31 files changed, 1665 insertions, 832 deletions

diff --git a/ChangeLog b/ChangeLog
index 8a616f47..ced3cdca 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -31,6 +31,21 @@
 
 2014-07-10         Arnold D. Robbins     <arnold@skeeve.com>
 
+	New `div()' function to do integer division and remainder;
+	mainly useful for use with GMP integers. Thanks to
+	Katie Wasserman <katie@wass.net> for the suggestion.
+
+	* awk.h (do_div, do_mpfr_div): Declare new functions.
+	* builtin.c (do_div): New function.
+	* mpfr.c (do_mpfr_div): New function.
+	* awkgram.y (tokentab): New entry.
+	(snode): Add check for do_div/do_mpfr_div to make 3rd arg
+	be an array.
+	* NEWS: Updated.
+	* TODO: Updated.
+
+2014-07-10         Arnold D. Robbins     <arnold@skeeve.com>
+
 	* awkgram.y (check_for_bad): New routine to do the fatal message,
 	with smarter checking.
 	(nextc): Call it as appropriate.
@@ -45,6 +60,13 @@
 	for bad characters in the source program.
 	(yylex): Adjust calls.
 
+2014-06-24         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* main.c (main): The --pretty-print option no longer runs the
+	program.  This removes the need for the GAWK_NO_PP_RUN environment var.
+	* NEWS: Updated.
+	* TODO: Updated.
+
 2014-06-22         Paul Eggert          <eggert@penguin.cs.ucla.edu>
 
 	Bring in from GNULIB:
@@ -165,6 +187,13 @@
 	been moved into the inetfile() function.
 	(two_way_open): Update args to inetfile().
 
+2014-04-20         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* builtin.c (do_rand): Make calls to random() in predictable
+	order to avoid order of evaluation differences amongst compilers.
+	Thanks to Anders Magnusson <ragge@ludd.ltu.se> (of the PCC team)
+	for the suggestion.
+
 2014-04-18         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* configure.ac: Change adding of -export-dynamic for GCC to be
@@ -531,6 +560,11 @@
 	* main.c (main): Ignore SIGPIPE. See the comment in the code.
 	Thanks to Alan Broder for reporting the issue.
 
+	Unrelated:
+
+	* rand.c (do_rand): Fix computation and loop checking against
+	1.0 to use do..while.
+
 2013-10-16         Arnold D. Robbins     <arnold@skeeve.com>
 
 	Make -O work again.  Turns out that C99 bool variables
@@ -548,6 +582,11 @@
 
 	* re.c (resetup): Add a comment about the joy of syntax bits.
 
+	Unrelated:
+
+	* builtin.c (do_rand): If result is exactly 1.0, keep trying.
+	Thanks to Nelson Beebe.
+
 2013-10-10         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* dfa.c (lex): Sync with GNU grep. Handle multibyte \s and \S.
@@ -567,6 +606,13 @@
 
 	* dfa.c: Sync with GNU grep.
 
+2013-09-25         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* builtin.c (do_rand): Make the result more random by calling
+	random() twice. See the comment in the code. Thanks to
+	Bob Jewett <jewett@bill.scs.agilent.com> for the report and
+	the fix.
+
 2013-09-24         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* debug.c (find_rule): Handle case where lineno is zero. Can happen
@@ -648,6 +694,12 @@
 
 	* regcomp.c, regex.h, regex_internal.h: Sync with GLIBC.
 
+2013-08-22         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* str_array.c (env_store): If the new value being stored is NULL,
+	pass in "" instead. Avoids core dump on Mac OS X.
+	Thanks to Hermann Peifer for the bug report.
+
 2013-08-20         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* nonposix.h: New file. Contains FAKE_FD_VALUE.
@@ -656,6 +708,16 @@
 
 2013-08-18         Arnold D. Robbins     <arnold@skeeve.com>
 
+	Reflect updates to ENVIRON into the real environment.
+
+	* awk.h (init_env_array): Add declaration.
+	* main.c (load_environ): Call init_env_array.
+	* str_array.c (env_remove, env_store, env_clear, init_env_array):
+	New functions.
+	(env_array_func): New array vtable.
+
+2013-08-18         Arnold D. Robbins     <arnold@skeeve.com>
+
 	* array.c (force_array): Set symbol->xarray to NULL before
 	initing the array if it was Node_var_new.
 	(null_array): Restore assert, undoing change of 2013-05-27.
diff --git a/Makefile.in b/Makefile.in
index d243df5b..2abf5b46 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -107,7 +107,7 @@ DIST_COMMON = INSTALL NEWS README AUTHORS ChangeLog \
 	$(srcdir)/Makefile.in $(srcdir)/Makefile.am \
 	$(top_srcdir)/configure $(am__configure_deps) \
 	$(srcdir)/configh.in mkinstalldirs ABOUT-NLS awkgram.c \
-	command.c depcomp ylwrap $(include_HEADERS) COPYING \
+	command.c depcomp ylwrap $(include_HEADERS) COPYING TODO \
 	config.guess config.rpath config.sub install-sh missing
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/m4/arch.m4 \
diff --git a/NEWS b/NEWS
index ac921ab0..c2cf63ac 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,27 @@
    are permitted in any medium without royalty provided the copyright
    notice and this notice are preserved.
 
+Changes from 4.1.x to 4.2.0
+---------------------------
+
+1. If not in POSIX mode, changes to ENVIRON are reflected into
+   gawk's environment, affecting any programs run by system()
+   or for piped redirections.
+
+2. The series of numbers returned by rand() should now be "more
+   random" than previously.  Gawk's rand() remains repeatable; you will
+   get the same series of numbers each time you call rand() repeatedly,
+   but this will be a different series than previously.
+
+3. The --pretty-print option no longer runs the program too.
+
+4. The igawk script and igawk.1 man page are no longer installed by
+   `make install'.  They have been obsolete since gawk 4.0.0.
+
+5. Gawk now has a `div()' function to perform integer division; this is
+   primarily useful for the -M option to avoid MPFR division when all
+   values involved are integers.
+
 Changes from 4.1.1 to 4.1.2
 ---------------------------
 
diff --git a/TODO b/TODO
new file mode 100644
index 00000000..35b327bc
--- /dev/null
+++ b/TODO
@@ -0,0 +1,199 @@
+Wed Jun 25 22:28:05 IDT 2014
+============================
+
+There were too many files tracking different thoughts and ideas for
+things to do, or consider doing.  This file merges them into one. As
+tasks are completed, they should be moved to the DONE section, below,
+or simply removed.
+
+Upon creation of a release (major or patch release), items from the
+previous release should be removed.
+
+This file should exist only in the master branch or branches based off
+of it for development, but not in the stable branch. This may require some
+careful work with Git.
+
+TODO
+====
+
+Minor Cleanups and Code Improvements
+------------------------------------
+
+	Review the bash source script for working with shared libraries in
+	order to nuke the use of libtool. [ Partially started in the
+	nolibtool branch. ]
+
+	Enhance profiling to save comments in a byte-code that does nothing
+	but that can be used when pretty printing the program.
+
+	API:
+		??? #if !defined(GAWK) && !defined(GAWK_OMIT_CONVENIENCE_MACROS)
+
+	?? Add debugger commands to reference card
+
+	Look at function order within files.
+
+	regex.h - remove underscores in param names
+
+	Consider removing use of and/or need for the protos.h file.
+
+	Recheck if gnulib regex can be dropped in
+
+	Fully synchronize whitespace tests (for \s, \S in Unicode
+	environment) with those of GNU grep.
+
+Minor New Features
+------------------
+
+	Enhance extension/fork.c waitpid to allow the caller to specify
+	the options.  And add an optional array argument to wait and
+	waitpid in which to return exit status information.
+
+	Consider relaxing the strictness of --posix.
+
+	Make it possible to put print/printf + redirections into
+	an expression.
+
+	? Add an optional base to strtonum, allowing 2-36.
+
+	? Optional third argument for index indicating where to start the
+	search.
+
+Major New Features
+------------------
+
+	Think about how to generalize indirect access. Manuel Collado
+	suggests things like
+
+		foo = 5
+		@"foo" += 4
+
+	Also needed:
+
+		Indirect calls of built-ins
+		Indirect calls of extension functions
+		Indirect through array elements, not just scalar variables
+
+	Some way to make regexp constants first class citizens:
+		- Assign to variables
+		- Pass to functions
+	Tawk has this and it would also make indirect calling of builtins
+	work more reasonably.  Probably would use a special syntax like
+	@/.../ for such objects.
+
+	Consider a typeof() function that returns a string (scalar, array,
+	regexp).
+
+	Add ability to do decimal arithmetic.
+
+	Rework management of array index storage. (Partially DONE.)
+
+	Consider using an atom table for all string array indices.
+
+	DBM storage of awk arrays. Try to allow multiple dbm packages.
+
+	?? A RECLEN variable for fixed-length record input. PROCINFO["RS"]
+	would be "RS" or "RECLEN" depending upon what's in use.
+	*** Could this be done as an extension?
+
+	?? Use a new or improved dfa and/or regex library.
+
+	Rewrite in C++.
+
+Things To Think About That May Never Happen
+-------------------------------------------
+
+	Consider making shadowed variables a warning and not
+	a fatal warning when --lint=fatal.
+
+	Similar for extra parameters in a function call.
+
+	Look at code coverage tools, like S2E: https://s2e.epfl.ch/
+	
+	Try running with diehard. See http://www.diehard-software.org,
+	https://github.com/emeryberger/DieHard
+
+	Implement namespaces.  Arnold suggested the following in an email:
+	- Extend the definition of an 'identifier' to include "." as a valid
+	  character although an identifier can't start with it.
+	- Extension libraries install functions and global variables with names
+	  that have a "." in them:  XML.parse(), XML.name, whatever.
+	- Awk code can read/write such variables and call such functions,
+	  but they cannot define such functions
+	 function XML.foo() { .. }	# error
+	  or create a variable with such a name if it doesn't exist. This would
+	  be a run-time error, not a parse-time error.
+	- This last rule may be too restrictive.
+	I don't want to get into fancy rules a la perl and file-scope visibility
+	etc, I'd like to keep things simple.  But how we design this is going
+	to be very important.
+
+	Include a sample rpm spec file in a new packaging subdirectory.
+	(Really needed?)
+
+	Patch lexer for @include and @load to make quotes optional.
+	(Really needed?)
+
+	? Have strftime() pay attention to the value of ENVIRON["TZ"]
+
+	Add a lint check if the return value of a function is used but
+	the function did not supply a value.
+
+	Consider making gawk output +nan for NaN values so that it
+	will accept its own output as input.
+		NOTE: Investigated this.  GLIBC formats NaN as '-nan'
+		and -NaN as 'nan'.  Dealing with this is not simple.
+
+	Enhance FIELDWIDTHS with some way to indicate "the rest of the record".
+	E.g., a length of 0 or -1 or something.  Maybe "n"?
+
+
+DONE
+====
+
+Minor Cleanups and Code Improvements
+------------------------------------
+
+Minor New Features
+------------------
+
+Major New Features
+------------------
+
+Things That We Decided We Will Never Do
+=======================================
+
+	Consider moving var_value info into Node_var itself to reduce
+	memory usage. This would break all uses of get_lhs in the
+	code. It's too sweeping a change.
+
+	Add macros for working with flags instead of using & and |
+	directly.
+
+	FIX regular field splitting to use FPAT algorithm.
+		Note: Looked at this. Not sure it's with the trouble:
+		If it ain't broke...
+
+	Scope IDs for IPv6 addresses
+
+	Gnulib
+
+	Make FIELDWIDTHS be an array?
+
+	"Do an optimization pass over parse tree?"
+	This isn't relevant now that we are using a byte code engine.
+
+	"Consider integrating Fred Fish's DBUG library into gawk."
+	I did this once as an experiment. But I don't see a lot of value
+	to this at this stage of the development. Stepping through things
+	in a debugger is generally enough. Also, I would have to try to
+	track down the latest version of this.
+
+	"Make 	awk '/foo/' files...	run at egrep speeds (how?)"
+	This has been on the list since the early days (gawk 1.x or early
+	2.x).  But I am not sure how to really do this, nor have I done
+	timings, nor does there seem to be any real demand for this.
+
+	Change from dlopen to using the libltdl library (i.e. lt_dlopen).
+	This may support more platforms.  If we move off of libtool
+	then this is the wrong direction.
diff --git a/awk.h b/awk.h
index 2370a9b2..c964ad19 100644
--- a/awk.h
+++ b/awk.h
@@ -1361,6 +1361,7 @@ extern NODE *do_aoption(int nargs);
 extern NODE *do_asort(int nargs);
 extern NODE *do_asorti(int nargs);
 extern unsigned long (*hash)(const char *s, size_t len, unsigned long hsize, size_t *code);
+extern void init_env_array(NODE *env_node);
 /* awkgram.c */
 extern NODE *variable(int location, char *name, NODETYPE type);
 extern int parse_program(INSTRUCTION **pcode);
@@ -1418,6 +1419,7 @@ extern AWKNUM nondec2awknum(char *str, size_t len);
 extern NODE *do_dcgettext(int nargs);
 extern NODE *do_dcngettext(int nargs);
 extern NODE *do_bindtextdomain(int nargs);
+extern NODE *do_div(int nargs);
 #if MBS_SUPPORT
 extern int strncasecmpmbs(const unsigned char *,
 			  const unsigned char *, size_t);
@@ -1554,6 +1556,7 @@ extern NODE *do_mpfr_and(int);
 extern NODE *do_mpfr_atan2(int);
 extern NODE *do_mpfr_compl(int);
 extern NODE *do_mpfr_cos(int);
+extern NODE *do_mpfr_div(int);
 extern NODE *do_mpfr_exp(int);
 extern NODE *do_mpfr_int(int);
 extern NODE *do_mpfr_log(int);
diff --git a/awkgram.c b/awkgram.c
index 711c2e37..28776494 100644
--- a/awkgram.c
+++ b/awkgram.c
@@ -4199,6 +4199,7 @@ static const struct token tokentab[] = {
 {"dcngettext",	Op_builtin,	 LEX_BUILTIN,	GAWKX|A(1)|A(2)|A(3)|A(4)|A(5),	do_dcngettext,	0},
 {"default",	Op_K_default,	 LEX_DEFAULT,	GAWKX,		0,	0},
 {"delete",	Op_K_delete,	 LEX_DELETE,	NOT_OLD,	0,	0},
+{"div",		Op_builtin,	 LEX_BUILTIN,	GAWKX|A(3),	do_div,	MPF(div)},
 {"do",		Op_K_do,	 LEX_DO,	NOT_OLD|BREAK|CONTINUE,	0,	0},
 {"else",	Op_K_else,	 LEX_ELSE,	0,		0,	0},
 {"eval",	Op_symbol,	 LEX_EVAL,	0,		0,	0},
@@ -6244,7 +6245,7 @@ snode(INSTRUCTION *subn, INSTRUCTION *r)
 	}
 
 #ifdef HAVE_MPFR
-	/* N.B.: There isn't any special processing for an alternate function below */
+	/* N.B.: If necessary, add special processing for alternate builtin, below */
 	if (do_mpfr && tokentab[idx].ptr2)
 		r->builtin =  tokentab[idx].ptr2;
 	else
@@ -6273,6 +6274,15 @@ snode(INSTRUCTION *subn, INSTRUCTION *r)
 		arg = subn->nexti;
 		if (arg->nexti == arg->lasti && arg->nexti->opcode == Op_push)
 			arg->nexti->opcode = Op_push_arg;	/* argument may be array */
+	} else if (r->builtin == do_div
+#ifdef HAVE_MPFR
+		   || r->builtin == MPF(div)
+#endif
+			) {
+		arg = subn->nexti->lasti->nexti->lasti->nexti;	/* 3rd arg list */
+		ip = arg->lasti;
+		if (ip->opcode == Op_push)
+			ip->opcode = Op_push_array;
 	} else if (r->builtin == do_match) {
 		static bool warned = false;
 
diff --git a/awkgram.y b/awkgram.y
index 1a199469..9e4f82b3 100644
--- a/awkgram.y
+++ b/awkgram.y
@@ -1860,6 +1860,7 @@ static const struct token tokentab[] = {
 {"dcngettext",	Op_builtin,	 LEX_BUILTIN,	GAWKX|A(1)|A(2)|A(3)|A(4)|A(5),	do_dcngettext,	0},
 {"default",	Op_K_default,	 LEX_DEFAULT,	GAWKX,		0,	0},
 {"delete",	Op_K_delete,	 LEX_DELETE,	NOT_OLD,	0,	0},
+{"div",		Op_builtin,	 LEX_BUILTIN,	GAWKX|A(3),	do_div,	MPF(div)},
 {"do",		Op_K_do,	 LEX_DO,	NOT_OLD|BREAK|CONTINUE,	0,	0},
 {"else",	Op_K_else,	 LEX_ELSE,	0,		0,	0},
 {"eval",	Op_symbol,	 LEX_EVAL,	0,		0,	0},
@@ -3905,7 +3906,7 @@ snode(INSTRUCTION *subn, INSTRUCTION *r)
 	}
 
 #ifdef HAVE_MPFR
-	/* N.B.: There isn't any special processing for an alternate function below */
+	/* N.B.: If necessary, add special processing for alternate builtin, below */
 	if (do_mpfr && tokentab[idx].ptr2)
 		r->builtin =  tokentab[idx].ptr2;
 	else
@@ -3934,6 +3935,15 @@ snode(INSTRUCTION *subn, INSTRUCTION *r)
 		arg = subn->nexti;
 		if (arg->nexti == arg->lasti && arg->nexti->opcode == Op_push)
 			arg->nexti->opcode = Op_push_arg;	/* argument may be array */
+	} else if (r->builtin == do_div
+#ifdef HAVE_MPFR
+		   || r->builtin == MPF(div)
+#endif
+			) {
+		arg = subn->nexti->lasti->nexti->lasti->nexti;	/* 3rd arg list */
+		ip = arg->lasti;
+		if (ip->opcode == Op_push)
+			ip->opcode = Op_push_array;
 	} else if (r->builtin == do_match) {
 		static bool warned = false;
 
diff --git a/awklib/Makefile.am b/awklib/Makefile.am
index 6ffbea81..87ee96b8 100644
--- a/awklib/Makefile.am
+++ b/awklib/Makefile.am
@@ -39,13 +39,12 @@ AM_CPPFLAGS = -I$(top_builddir) -I$(top_srcdir)
 pkgdatadir = $(datadir)/awk
 pkglibexecdir = $(libexecdir)/awk
 
-bin_SCRIPTS = igawk
 pkglibexec_PROGRAMS = pwcat grcat
 AUXAWK = passwd.awk group.awk
 nodist_grcat_SOURCES = grcat.c
 nodist_pwcat_SOURCES = pwcat.c
 
-all: $(srcdir)/stamp-eg $(AUXPROGS) igawk $(AUXAWK)
+all: $(srcdir)/stamp-eg $(AUXPROGS) $(AUXAWK)
 
 install-exec-hook: $(AUXAWK)
 	$(mkinstalldirs) $(DESTDIR)$(pkgdatadir)
@@ -57,10 +56,9 @@ install-exec-hook: $(AUXAWK)
 # pkglibexecdir and pkgdatadir are removed in the top level Makefile's uninstall
 uninstall-local:
 	rm -fr $(DESTDIR)$(pkglibexecdir)/* $(DESTDIR)$(pkgdatadir)/*
-	rm -f $(DESTDIR)$(bindir)/igawk
 
 clean-local:
-	rm -f $(AUXAWK) igawk *.exe
+	rm -f $(AUXAWK) *.exe
 	rm -fr eg.old
 	rm -fr grcat.dSYM pwcat.dSYM
 
@@ -72,7 +70,7 @@ $(srcdir)/stamp-eg: $(srcdir)/../doc/gawk.texi $(srcdir)/../doc/gawkinet.texi
 	@echo 'some makes are stupid and will not check a directory' > $(srcdir)/stamp-eg
 	@echo 'against a file, so this file is a place holder. gack.' >> $(srcdir)/stamp-eg
 
-$(srcdir)/eg/lib/pwcat.c $(srcdir)/eg/lib/grcat.c $(srcdir)/eg/prog/igawk.sh \
+$(srcdir)/eg/lib/pwcat.c $(srcdir)/eg/lib/grcat.c \
 $(srcdir)/eg/lib/passwdawk.in $(srcdir)/eg/lib/groupawk.in: stamp-eg; @:
 
 pwcat$(EXEEXT): $(srcdir)/eg/lib/pwcat.c
@@ -81,9 +79,6 @@ pwcat$(EXEEXT): $(srcdir)/eg/lib/pwcat.c
 grcat$(EXEEXT): $(srcdir)/eg/lib/grcat.c
 	$(COMPILE) $(srcdir)/eg/lib/grcat.c $(LDFLAGS) -o $@
 
-igawk: $(srcdir)/eg/prog/igawk.sh
-	cp $(srcdir)/eg/prog/igawk.sh $@ ; chmod 755 $@
-
 passwd.awk: $(srcdir)/eg/lib/passwdawk.in
 	sed 's;/usr/local/libexec/awk;$(pkglibexecdir);' < $(srcdir)/eg/lib/passwdawk.in > passwd.awk
 
diff --git a/awklib/Makefile.in b/awklib/Makefile.in
index d32ae04a..38124fad 100644
--- a/awklib/Makefile.in
+++ b/awklib/Makefile.in
@@ -37,7 +37,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 #
 
-
 VPATH = @srcdir@
 am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)'
 am__make_running_with_option = \
@@ -122,7 +121,7 @@ mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
 CONFIG_HEADER = $(top_builddir)/config.h
 CONFIG_CLEAN_FILES =
 CONFIG_CLEAN_VPATH_FILES =
-am__installdirs = "$(DESTDIR)$(pkglibexecdir)" "$(DESTDIR)$(bindir)"
+am__installdirs = "$(DESTDIR)$(pkglibexecdir)"
 PROGRAMS = $(pkglibexec_PROGRAMS)
 nodist_grcat_OBJECTS = grcat.$(OBJEXT)
 grcat_OBJECTS = $(nodist_grcat_OBJECTS)
@@ -130,34 +129,6 @@ grcat_LDADD = $(LDADD)
 nodist_pwcat_OBJECTS = pwcat.$(OBJEXT)
 pwcat_OBJECTS = $(nodist_pwcat_OBJECTS)
 pwcat_LDADD = $(LDADD)
-am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
-am__vpath_adj = case $$p in \
-    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
-    *) f=$$p;; \
-  esac;
-am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
-am__install_max = 40
-am__nobase_strip_setup = \
-  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
-am__nobase_strip = \
-  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
-am__nobase_list = $(am__nobase_strip_setup); \
-  for p in $$list; do echo "$$p $$p"; done | \
-  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
-  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
-    if (++n[$$2] == $(am__install_max)) \
-      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
-    END { for (dir in files) print dir, files[dir] }'
-am__base_list = \
-  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
-  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
-am__uninstall_files_from_dir = { \
-  test -z "$$files" \
-    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
-    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
-         $(am__cd) "$$dir" && rm -f $$files; }; \
-  }
-SCRIPTS = $(bin_SCRIPTS)
 AM_V_P = $(am__v_P_@AM_V@)
 am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
 am__v_P_0 = false
@@ -349,7 +320,6 @@ EXTRA_DIST = ChangeLog ChangeLog.0 extract.awk eg $(srcdir)/stamp-eg
 
 # Get config.h from the build directory and custom.h from the source directory.
 AM_CPPFLAGS = -I$(top_builddir) -I$(top_srcdir)
-bin_SCRIPTS = igawk
 AUXAWK = passwd.awk group.awk
 nodist_grcat_SOURCES = grcat.c
 nodist_pwcat_SOURCES = pwcat.c
@@ -429,41 +399,6 @@ uninstall-pkglibexecPROGRAMS:
 
 clean-pkglibexecPROGRAMS:
 	-test -z "$(pkglibexec_PROGRAMS)" || rm -f $(pkglibexec_PROGRAMS)
-install-binSCRIPTS: $(bin_SCRIPTS)
-	@$(NORMAL_INSTALL)
-	@list='$(bin_SCRIPTS)'; test -n "$(bindir)" || list=; \
-	if test -n "$$list"; then \
-	  echo " $(MKDIR_P) '$(DESTDIR)$(bindir)'"; \
-	  $(MKDIR_P) "$(DESTDIR)$(bindir)" || exit 1; \
-	fi; \
-	for p in $$list; do \
-	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
-	  if test -f "$$d$$p"; then echo "$$d$$p"; echo "$$p"; else :; fi; \
-	done | \
-	sed -e 'p;s,.*/,,;n' \
-	    -e 'h;s|.*|.|' \
-	    -e 'p;x;s,.*/,,;$(transform)' | sed 'N;N;N;s,\n, ,g' | \
-	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1; } \
-	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
-	    if ($$2 == $$4) { files[d] = files[d] " " $$1; \
-	      if (++n[d] == $(am__install_max)) { \
-		print "f", d, files[d]; n[d] = 0; files[d] = "" } } \
-	    else { print "f", d "/" $$4, $$1 } } \
-	  END { for (d in files) print "f", d, files[d] }' | \
-	while read type dir files; do \
-	     if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
-	     test -z "$$files" || { \
-	       echo " $(INSTALL_SCRIPT) $$files '$(DESTDIR)$(bindir)$$dir'"; \
-	       $(INSTALL_SCRIPT) $$files "$(DESTDIR)$(bindir)$$dir" || exit $$?; \
-	     } \
-	; done
-
-uninstall-binSCRIPTS:
-	@$(NORMAL_UNINSTALL)
-	@list='$(bin_SCRIPTS)'; test -n "$(bindir)" || exit 0; \
-	files=`for p in $$list; do echo "$$p"; done | \
-	       sed -e 's,.*/,,;$(transform)'`; \
-	dir='$(DESTDIR)$(bindir)'; $(am__uninstall_files_from_dir)
 
 mostlyclean-compile:
 	-rm -f *.$(OBJEXT)
@@ -572,9 +507,9 @@ distdir: $(DISTFILES)
 	done
 check-am: all-am
 check: check-am
-all-am: Makefile $(PROGRAMS) $(SCRIPTS)
+all-am: Makefile $(PROGRAMS)
 installdirs:
-	for dir in "$(DESTDIR)$(pkglibexecdir)" "$(DESTDIR)$(bindir)"; do \
+	for dir in "$(DESTDIR)$(pkglibexecdir)"; do \
 	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
 	done
 install: install-am
@@ -636,7 +571,7 @@ install-dvi: install-dvi-am
 
 install-dvi-am:
 
-install-exec-am: install-binSCRIPTS install-pkglibexecPROGRAMS
+install-exec-am: install-pkglibexecPROGRAMS
 	@$(NORMAL_INSTALL)
 	$(MAKE) $(AM_MAKEFLAGS) install-exec-hook
 install-html: install-html-am
@@ -676,8 +611,7 @@ ps: ps-am
 
 ps-am:
 
-uninstall-am: uninstall-binSCRIPTS uninstall-local \
-	uninstall-pkglibexecPROGRAMS
+uninstall-am: uninstall-local uninstall-pkglibexecPROGRAMS
 
 .MAKE: install-am install-exec-am install-strip
 
@@ -685,20 +619,19 @@ uninstall-am: uninstall-binSCRIPTS uninstall-local \
 	clean-local clean-pkglibexecPROGRAMS cscopelist-am ctags \
 	ctags-am distclean distclean-compile distclean-generic \
 	distclean-tags distdir dvi dvi-am html html-am info info-am \
-	install install-am install-binSCRIPTS install-data \
-	install-data-am install-dvi install-dvi-am install-exec \
-	install-exec-am install-exec-hook install-html install-html-am \
-	install-info install-info-am install-man install-pdf \
-	install-pdf-am install-pkglibexecPROGRAMS install-ps \
-	install-ps-am install-strip installcheck installcheck-am \
-	installdirs maintainer-clean maintainer-clean-generic \
-	mostlyclean mostlyclean-compile mostlyclean-generic pdf pdf-am \
-	ps ps-am tags tags-am uninstall uninstall-am \
-	uninstall-binSCRIPTS uninstall-local \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-exec-hook \
+	install-html install-html-am install-info install-info-am \
+	install-man install-pdf install-pdf-am \
+	install-pkglibexecPROGRAMS install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am uninstall-local \
 	uninstall-pkglibexecPROGRAMS
 
 
-all: $(srcdir)/stamp-eg $(AUXPROGS) igawk $(AUXAWK)
+all: $(srcdir)/stamp-eg $(AUXPROGS) $(AUXAWK)
 
 install-exec-hook: $(AUXAWK)
 	$(mkinstalldirs) $(DESTDIR)$(pkgdatadir)
@@ -710,10 +643,9 @@ install-exec-hook: $(AUXAWK)
 # pkglibexecdir and pkgdatadir are removed in the top level Makefile's uninstall
 uninstall-local:
 	rm -fr $(DESTDIR)$(pkglibexecdir)/* $(DESTDIR)$(pkgdatadir)/*
-	rm -f $(DESTDIR)$(bindir)/igawk
 
 clean-local:
-	rm -f $(AUXAWK) igawk *.exe
+	rm -f $(AUXAWK) *.exe
 	rm -fr eg.old
 	rm -fr grcat.dSYM pwcat.dSYM
 
@@ -725,7 +657,7 @@ $(srcdir)/stamp-eg: $(srcdir)/../doc/gawk.texi $(srcdir)/../doc/gawkinet.texi
 	@echo 'some makes are stupid and will not check a directory' > $(srcdir)/stamp-eg
 	@echo 'against a file, so this file is a place holder. gack.' >> $(srcdir)/stamp-eg
 
-$(srcdir)/eg/lib/pwcat.c $(srcdir)/eg/lib/grcat.c $(srcdir)/eg/prog/igawk.sh \
+$(srcdir)/eg/lib/pwcat.c $(srcdir)/eg/lib/grcat.c \
 $(srcdir)/eg/lib/passwdawk.in $(srcdir)/eg/lib/groupawk.in: stamp-eg; @:
 
 pwcat$(EXEEXT): $(srcdir)/eg/lib/pwcat.c
@@ -734,9 +666,6 @@ pwcat$(EXEEXT): $(srcdir)/eg/lib/pwcat.c
 grcat$(EXEEXT): $(srcdir)/eg/lib/grcat.c
 	$(COMPILE) $(srcdir)/eg/lib/grcat.c $(LDFLAGS) -o $@
 
-igawk: $(srcdir)/eg/prog/igawk.sh
-	cp $(srcdir)/eg/prog/igawk.sh $@ ; chmod 755 $@
-
 passwd.awk: $(srcdir)/eg/lib/passwdawk.in
 	sed 's;/usr/local/libexec/awk;$(pkglibexecdir);' < $(srcdir)/eg/lib/passwdawk.in > passwd.awk
 
diff --git a/builtin.c b/builtin.c
index 7523d6c9..6f8aeb36 100644
--- a/builtin.c
+++ b/builtin.c
@@ -2393,6 +2393,8 @@ static char *const state = (char *const) istate;
 NODE *
 do_rand(int nargs ATTRIBUTE_UNUSED)
 {
+	double tmprand;
+#define RAND_DIVISOR ((double)GAWK_RANDOM_MAX+1.0)
 	if (firstrand) {
 		(void) initstate((unsigned) 1, state, SIZEOF_STATE);
 		/* don't need to srandom(1), initstate() does it for us. */
@@ -2404,7 +2406,66 @@ do_rand(int nargs ATTRIBUTE_UNUSED)
 	 *
 	 * 	0 <= n < 1
 	 */
-	return make_number((AWKNUM) (random() % GAWK_RANDOM_MAX) / GAWK_RANDOM_MAX);
+ 	/*
+	 * Date: Wed, 28 Aug 2013 17:52:46 -0700
+	 * From: Bob Jewett <jewett@bill.scs.agilent.com>
+	 *
+ 	 * Call random() twice to fill in more bits in the value
+ 	 * of the double.  Also, there is a bug in random() such
+ 	 * that when the values of successive values are combined
+ 	 * like (rand1*rand2)^2, (rand3*rand4)^2,  ...  the
+ 	 * resulting time series is not white noise.  The
+ 	 * following also seems to fix that bug. 
+ 	 *
+ 	 * The add/subtract 0.5 keeps small bits from filling
+ 	 * below 2^-53 in the double, not that anyone should be
+ 	 * looking down there. 
+	 *
+	 * Date: Wed, 25 Sep 2013 10:45:38 -0600 (MDT)
+	 * From: "Nelson H. F. Beebe" <beebe@math.utah.edu>
+	 * (4) The code is typical of many published fragments for converting
+	 *     from integer to floating-point, and I discuss the serious pitfalls
+	 *     in my book, because it leads to platform-dependent behavior at the
+	 *     end points of the interval [0,1]
+	 * 
+	 * (5) the documentation in the gawk info node says
+	 * 
+	 *     `rand()'
+	 * 	 Return a random number.  The values of `rand()' are uniformly
+	 * 	 distributed between zero and one.  The value could be zero but is
+	 * 	 never one.(1)
+	 * 
+	 *     The division by RAND_DIVISOR may not guarantee that 1.0 is never
+	 *     returned: the programmer forgot the platform-dependent issue of
+	 *     rounding.
+	 * 
+	 * For points 4 and 5, the safe way is a loop:
+	 * 
+	 *         double 
+	 * 	   rand(void)		// return value in [0.0, 1.0)
+	 *         {
+	 * 	    value = internal_rand();
+	 *
+	 * 	    while (value == 1.0) 
+	 *                 value = internal_rand();
+	 * 
+	 * 	    return (value);
+	 *         }
+ 	 */
+ 
+	do {
+		long d1, d2;
+		/*
+		 * Do the calls in predictable order to avoid
+		 * compiler differences in order of evaluation.
+		 */
+		d1 = random();
+		d2 = random();
+	 	tmprand = 0.5 + ( (d1/RAND_DIVISOR + d2) / RAND_DIVISOR );
+		tmprand -= 0.5;
+	} while (tmprand == 1.0);
+
+ 	return make_number((AWKNUM) tmprand);
 }
 
 /* do_srand --- seed the random number generator */
@@ -3551,6 +3612,72 @@ do_bindtextdomain(int nargs)
 	return make_string(the_result, strlen(the_result));
 }
 
+/* do_div --- do integer division, return quotient and remainder in dest array */
+
+/*
+ * We define the semantics as:
+ * 	numerator = int(numerator)
+ *	denominator = int(denonmator)
+ *	quotient = int(numerator / denomator)
+ *	remainder = int(numerator % denomator)
+ */
+
+NODE *
+do_div(int nargs)
+{
+	NODE *numerator, *denominator, *result;
+	double num, denom, quotient, remainder;
+	NODE *sub, **lhs;
+
+	result = POP_PARAM();
+	if (result->type != Node_var_array)
+		fatal(_("div: third argument is not an array"));
+	assoc_clear(result);
+
+	denominator = POP_SCALAR();
+	numerator = POP_SCALAR();
+
+	if (do_lint) {
+		if ((numerator->flags & (NUMCUR|NUMBER)) == 0)
+			lintwarn(_("div: received non-numeric first argument"));
+		if ((denominator->flags & (NUMCUR|NUMBER)) == 0)
+			lintwarn(_("div: received non-numeric second argument"));
+	}
+
+	(void) force_number(numerator);
+	(void) force_number(denominator);
+	num = double_to_int(get_number_d(numerator));
+	denom = double_to_int(get_number_d(denominator));
+
+	if (denom == 0.0)
+		fatal(_("div: division by zero attempted"));
+
+	quotient = double_to_int(num / denom);
+	/*
+	 * FIXME: This code is duplicated, factor it out to a
+	 * separate function.
+	 */
+#ifdef HAVE_FMOD
+	remainder = fmod(num, denom);
+#else	/* ! HAVE_FMOD */
+	(void) modf(num / denom, & remainder);
+	remainder = num - remainder * denom;
+#endif	/* ! HAVE_FMOD */
+	remainder = double_to_int(remainder);
+
+	sub = make_string("quotient", 8);
+	lhs = assoc_lookup(result, sub);
+	unref(*lhs);
+	*lhs = make_number((AWKNUM) quotient);
+
+	sub = make_string("remainder", 9);
+	lhs = assoc_lookup(result, sub);
+	unref(*lhs);
+	*lhs = make_number((AWKNUM) remainder);
+
+	return make_number((AWKNUM) 0.0);
+}
+
 
 /* mbc_byte_count --- return number of bytes for corresponding numchars multibyte characters */
 
diff --git a/configure b/configure
index 0cd8ff22..4dc9ce8d 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for GNU Awk 4.1.1a.
+# Generated by GNU Autoconf 2.69 for GNU Awk 4.1.60.
 #
 # Report bugs to <bug-gawk@gnu.org>.
 #
@@ -580,8 +580,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='GNU Awk'
 PACKAGE_TARNAME='gawk'
-PACKAGE_VERSION='4.1.1a'
-PACKAGE_STRING='GNU Awk 4.1.1a'
+PACKAGE_VERSION='4.1.60'
+PACKAGE_STRING='GNU Awk 4.1.60'
 PACKAGE_BUGREPORT='bug-gawk@gnu.org'
 PACKAGE_URL='http://www.gnu.org/software/gawk/'
 
@@ -1324,7 +1324,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures GNU Awk 4.1.1a to adapt to many kinds of systems.
+\`configure' configures GNU Awk 4.1.60 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1394,7 +1394,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of GNU Awk 4.1.1a:";;
+     short | recursive ) echo "Configuration of GNU Awk 4.1.60:";;
    esac
   cat <<\_ACEOF
 
@@ -1512,7 +1512,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-GNU Awk configure 4.1.1a
+GNU Awk configure 4.1.60
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -2221,7 +2221,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by GNU Awk $as_me 4.1.1a, which was
+It was created by GNU Awk $as_me 4.1.60, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -3104,7 +3104,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='gawk'
- VERSION='4.1.1a'
+ VERSION='4.1.60'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -11506,7 +11506,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by GNU Awk $as_me 4.1.1a, which was
+This file was extended by GNU Awk $as_me 4.1.60, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -11574,7 +11574,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-GNU Awk config.status 4.1.1a
+GNU Awk config.status 4.1.60
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index b0817ba3..e7e2d5f6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,7 +23,7 @@ dnl
 
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT([GNU Awk], 4.1.1a, bug-gawk@gnu.org, gawk)
+AC_INIT([GNU Awk], 4.1.60, bug-gawk@gnu.org, gawk)
 
 # This is a hack. Different versions of install on different systems
 # are just too different. Chuck it and use install-sh.
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 43646426..9bf0b156 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,15 @@
+2014-07-24         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* gawktexi.in (Numeric Functions): For `div()', clarify
+	truncation is towards zero.  Thanks to Michal Jaegermann
+	for pointing out the need to clarify this.
+
+2014-07-10         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* gawktexi.in (Numeric Functions): Document new `div()' function.
+	(Arbitrary Precision Integers): Document raison d'etre for div().
+	* gawk.1, awkcard.in: Document `div()'.
+
 2014-07-04         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* gawktexi.in (Bracket Expressions): Add a note about how to
@@ -8,6 +20,11 @@
 	* gawktexi.in: Update permissions on copyright page per
 	latest maintain.texi. Add GPL to print version of book.
 
+2014-06-24         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* gawktexi.in: Document that --pretty-print no longer runs the
+	program. Remove mention of GAWK_NO_PP_RUN env var.
+
 2014-06-22         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* gawktexi.in: Typo fixes and minor corrections.
@@ -304,7 +321,7 @@
 2013-12-26         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* gawktexi.in: More minor additions / fixes.
-	(Bugs): Add John Malmberg for VMS.
+	(Bugs): Add John Malmberg for VMS. Other minor edits.
 
 2013-12-25         Arnold D. Robbins     <arnold@skeeve.com>
 
@@ -378,6 +395,11 @@
 	* gawktexi.in (FN, FFN, DF,DDF, PVERSION, CTL): Remove macros.
 	They have no alternate versions and are just in the way.
 
+2013-08-15         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* gawk.1: Document that ENVIRON updates affect the environment.
+	* gawktexi.in: Ditto.
+
 2013-06-27         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* texinfo.tex: Update from Karl, fixes a formating problem.
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 86321bbc..8a0442a7 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -26,7 +26,7 @@
 
 info_TEXINFOS = gawk.texi gawkinet.texi
 
-man_MANS = gawk.1 igawk.1
+man_MANS = gawk.1
 
 EXTRA_DIST = ChangeLog ChangeLog.0 README.card ad.block setter.outline \
 	awkcard.in awkforai.txt texinfo.tex cardfonts \
@@ -50,7 +50,7 @@ EXTRA_DIST = ChangeLog ChangeLog.0 README.card ad.block setter.outline \
 	bc_notes
 
 # Get rid of generated files when cleaning
-CLEANFILES = *.ps *.html *.dvi *~ awkcard.nc awkcard.tr gawk.pdf gawkinet.pdf awkcard.pdf gawk.1.pdf igawk.1.pdf
+CLEANFILES = *.ps *.html *.dvi *~ awkcard.nc awkcard.tr gawk.pdf gawkinet.pdf awkcard.pdf gawk.1.pdf
 
 MAKEINFO = @MAKEINFO@ --no-split --force
 
@@ -75,9 +75,9 @@ AWKCARD = awkcard.ps
 gawk.texi: $(srcdir)/gawktexi.in $(srcdir)/sidebar.awk
 	awk -f $(srcdir)/sidebar.awk < $(srcdir)/gawktexi.in > gawk.texi
 
-postscript: gawk.ps gawkinet.ps gawk.1.ps igawk.1.ps $(AWKCARD)
+postscript: gawk.ps gawkinet.ps gawk.1.ps $(AWKCARD)
 
-pdf: postscript gawk.pdf gawkinet.pdf awkcard.pdf gawk.1.pdf igawk.1.pdf
+pdf: postscript gawk.pdf gawkinet.pdf awkcard.pdf gawk.1.pdf
 
 gawk.ps: gawk.dvi
 	TEXINPUTS=$(srcdir): dvips -o gawk.ps gawk.dvi
@@ -91,12 +91,6 @@ gawk.1.ps: gawk.1
 gawk.1.pdf: gawk.1.ps
 	ps2pdf gawk.1.ps gawk.1.pdf
 
-igawk.1.ps: igawk.1
-	-groff -man $(srcdir)/igawk.1 > igawk.1.ps
-
-igawk.1.pdf: igawk.1.ps
-	ps2pdf igawk.1.ps igawk.1.pdf
-
 awkcard.tr: awkcard.in
 	sed 's:SRCDIR:$(srcdir):' < $(srcdir)/awkcard.in > awkcard.tr
 
diff --git a/doc/Makefile.in b/doc/Makefile.in
index abaf5601..d89beffd 100644
--- a/doc/Makefile.in
+++ b/doc/Makefile.in
@@ -341,7 +341,7 @@ top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 info_TEXINFOS = gawk.texi gawkinet.texi
-man_MANS = gawk.1 igawk.1
+man_MANS = gawk.1
 EXTRA_DIST = ChangeLog ChangeLog.0 README.card ad.block setter.outline \
 	awkcard.in awkforai.txt texinfo.tex cardfonts \
 	api-figure1.eps api-figure1.fig api-figure1.pdf \
@@ -365,7 +365,7 @@ EXTRA_DIST = ChangeLog ChangeLog.0 README.card ad.block setter.outline \
 
 
 # Get rid of generated files when cleaning
-CLEANFILES = *.ps *.html *.dvi *~ awkcard.nc awkcard.tr gawk.pdf gawkinet.pdf awkcard.pdf gawk.1.pdf igawk.1.pdf
+CLEANFILES = *.ps *.html *.dvi *~ awkcard.nc awkcard.tr gawk.pdf gawkinet.pdf awkcard.pdf gawk.1.pdf
 TROFF = groff -t -Tps -U
 SEDME = sed -e "s/^level0 restore/level0 restore flashme 100 72 moveto (Copyright `date '+%m-%d-%y %T'`, FSF, Inc. (all)) show/" \
 		-e "s/^\/level0 save def/\/level0 save def 30 -48 translate/"
@@ -869,9 +869,9 @@ uninstall-man: uninstall-man1
 gawk.texi: $(srcdir)/gawktexi.in $(srcdir)/sidebar.awk
 	awk -f $(srcdir)/sidebar.awk < $(srcdir)/gawktexi.in > gawk.texi
 
-postscript: gawk.ps gawkinet.ps gawk.1.ps igawk.1.ps $(AWKCARD)
+postscript: gawk.ps gawkinet.ps gawk.1.ps $(AWKCARD)
 
-pdf: postscript gawk.pdf gawkinet.pdf awkcard.pdf gawk.1.pdf igawk.1.pdf
+pdf: postscript gawk.pdf gawkinet.pdf awkcard.pdf gawk.1.pdf
 
 gawk.ps: gawk.dvi
 	TEXINPUTS=$(srcdir): dvips -o gawk.ps gawk.dvi
@@ -885,12 +885,6 @@ gawk.1.ps: gawk.1
 gawk.1.pdf: gawk.1.ps
 	ps2pdf gawk.1.ps gawk.1.pdf
 
-igawk.1.ps: igawk.1
-	-groff -man $(srcdir)/igawk.1 > igawk.1.ps
-
-igawk.1.pdf: igawk.1.ps
-	ps2pdf igawk.1.ps igawk.1.pdf
-
 awkcard.tr: awkcard.in
 	sed 's:SRCDIR:$(srcdir):' < $(srcdir)/awkcard.in > awkcard.tr
 
diff --git a/doc/awkcard.in b/doc/awkcard.in
index ca28f0a7..556bdc1e 100644
--- a/doc/awkcard.in
+++ b/doc/awkcard.in
@@ -1609,6 +1609,9 @@ expand;
 l lw(2i).
 \*(CD\*(FCatan2(\*(FIy\*(FC, \*(FIx\*(FC)\*(FR	The arctangent of \*(FIy/x\fP in radians.
 \*(FCcos(\*(FIexpr\*(FC)\*(FR	The cosine of \*(FIexpr\fP, which is in radians.
+\*(CB\*(FCdiv(\*(FIn\*(FR\*(FC,\*(FI d\*(FR\*(FC,\*(FI res\*(FR\*(FC)\*(FR	T{
+Return the result of integer division in \*(FIres\*(FR.\*(CD
+T}
 \*(FCexp(\*(FIexpr\*(FC)\*(FR	The exponential function (\*(FIe \*(FC^ \*(FIx\*(FR).
 \*(FCint(\*(FIexpr\*(FC)\*(FR	Truncate to integer.
 \*(FClog(\*(FIexpr\*(FC)\*(FR	The natural logarithm function (base \*(FIe\^\*(FR).
diff --git a/doc/gawk.1 b/doc/gawk.1
index c7646557..d5756f08 100644
--- a/doc/gawk.1
+++ b/doc/gawk.1
@@ -13,7 +13,7 @@
 .		if \w'\(rq' .ds rq "\(rq
 .	\}
 .\}
-.TH GAWK 1 "Apr 17 2014" "Free Software Foundation" "Utility Commands"
+.TH GAWK 1 "Jul 10 2014" "Free Software Foundation" "Utility Commands"
 .SH NAME
 gawk \- pattern scanning and processing language
 .SH SYNOPSIS
@@ -917,11 +917,17 @@ An array containing the values of the current environment.
 The array is indexed by the environment variables, each element being
 the value of that variable (e.g., \fBENVIRON["HOME"]\fP might be
 \fB"/home/arnold"\fR).
-Changing this array does not affect the environment seen by programs which
+.sp
+In POSIX mode,
+changing this array does not affect the environment seen by programs which
 .I gawk
 spawns via redirection or the
 .B system()
 function.
+Otherwise,
+.I gawk
+updates its real environment so that programs it spawns see
+the changes.
 .TP
 .B ERRNO
 If a system error occurs either doing a redirection for
@@ -2623,6 +2629,23 @@ Return the cosine of
 .IR expr ,
 which is in radians.
 .TP
+.BI div( num ", " denom ", " result )
+Truncate
+.I num
+and
+.I denom
+to integers. Return the quotient of
+.I num
+divided by
+.I denom
+in \fIresult\fB["quotient"]\fR
+and the remainder in
+in \fIresult\fB["remainder"]\fR.
+This is a
+.I gawk
+extension, primarily of value when working with
+arbitrarily large integers.
+.TP
 .BI exp( expr )
 The exponential function.
 .TP
diff --git a/doc/gawk.info b/doc/gawk.info
index 8b5e572f..e6c9a5d4 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -2563,10 +2563,8 @@ The following list describes options mandated by the POSIX standard:
      different file name for the output.  No space is allowed between
      the `-o' and FILE, if FILE is supplied.
 
-          NOTE: Due to the way `gawk' has evolved, with this option
-          your program is still executed.  This will change in the next
-          major release such that `gawk' will only pretty-print the
-          program and not run it.
+          NOTE: In the past, this option would also execute your
+          program.  This is no longer the case.
 
 `-O'
 `--optimize'
@@ -2950,11 +2948,6 @@ change. The variables are:
      supposed to be differences, but occasionally theory and practice
      don't coordinate with each other.)
 
-`GAWK_NO_PP_RUN'
-     If this variable exists, then when invoked with the
-     `--pretty-print' option, `gawk' skips running the program.  This
-     variable will not survive into the next major release.
-
 `GAWK_STACKSIZE'
      This specifies the amount by which `gawk' should grow its internal
      evaluation stack, when needed.
@@ -10163,10 +10156,18 @@ Options::), they are not special.
      An associative array containing the values of the environment.
      The array indices are the environment variable names; the elements
      are the values of the particular environment variables.  For
-     example, `ENVIRON["HOME"]' might be `"/home/arnold"'.  Changing
-     this array does not affect the environment passed on to any
-     programs that `awk' may spawn via redirection or the `system()'
-     function.  (In a future version of `gawk', it may do so.)
+     example, `ENVIRON["HOME"]' might be `/home/arnold'.
+
+     For POSIX `awk', changing this array does not affect the
+     environment passed on to any programs that `awk' may spawn via
+     redirection or the `system()' function.
+
+     However, beginning with version 4.2, if not in POSIX compatibility
+     mode, `gawk' does update its own environment when `ENVIRON' is
+     changed, thus changing the environment seen by programs that it
+     creates.  You should therefore be especially careful if you modify
+     `ENVIRON["PATH"]"', which is the search path for finding
+     executable programs.
 
      Some operating systems may not have environment variables.  On
      such systems, the `ENVIRON' array is empty (except for
@@ -11679,6 +11680,21 @@ brackets ([ ]):
 `cos(X)'
      Return the cosine of X, with X in radians.
 
+`div(NUMERATOR, DENOMINATOR, RESULT)'
+     Perform integer division, similar to the standard C function of the
+     same name.  First, truncate `numerator' and `denominator' towards
+     zero, creating integer values.  Clear the `result' array, and then
+     set `result["quotient"]' to the result of `numerator /
+     denominator', truncated towards zero to an integer, and set
+     `result["remainder"]' to the result of `numerator % denominator',
+     truncated towards zero to an integer.  This function is primarily
+     intended for use with arbitrary length integers; it avoids
+     creating MPFR arbitrary precision floating-point values (*note
+     Arbitrary Precision Integers::).
+
+     This function is a `gawk' extension.  It is not available in
+     compatibility mode (*note Options::).
+
 `exp(X)'
      Return the exponential of X (`e ^ X') or report an error if X is
      out of range.  The range of values X can have depends on your
@@ -19635,8 +19651,8 @@ by the `Ctrl-<\>' key.
 called this way, `gawk' "pretty prints" the program into `awkprof.out',
 without any execution counts.
 
-     NOTE: The `--pretty-print' option still runs your program.  This
-     will change in the next major release.
+     NOTE: Once upon a time, the `--pretty-print' option would also run
+     your program.  This is is no longer the case.
 
 
 File: gawk.info,  Node: Advanced Features Summary,  Prev: Profiling,  Up: Advanced Features
@@ -22081,6 +22097,29 @@ just use the following:
 
      gawk -M 'BEGIN { n = 13; print n % 2 }'
 
+   When dividing two arbitrary precision integers with either `/' or
+`%', the result is typically an arbitrary precision floating point
+value (unless the denominator evenly divides into the numerator).  In
+order to do integer division or remainder with arbitrary precision
+integers, use the built-in `div()' function (*note Numeric Functions::).
+
+   You can simulate the `div()' function in standard `awk' using this
+user-defined function:
+
+     # div --- do integer division
+
+     function div(numerator, denominator, result,    i)
+     {
+         split("", result)
+
+         numerator = int(numerator)
+         denominator = int(denominator)
+         result["quotient"] = int(numerator / denominator)
+         result["remainder"] = int(numerator % denominator)
+
+         return 0.0
+     }
+
    ---------- Footnotes ----------
 
    (1) Weisstein, Eric W.  `Sylvester's Sequence'. From MathWorld--A
@@ -27005,7 +27044,9 @@ Various `.c', `.y', and `.h' files
 
 `doc/igawk.1'
      The `troff' source for a manual page describing the `igawk'
-     program presented in *note Igawk Program::.
+     program presented in *note Igawk Program::.  (Since `gawk' can do
+     its own `@include' processing, neither `igawk' nor `igawk.1' are
+     installed.)
 
 `doc/Makefile.in'
      The input file used during the configuration process to generate
@@ -27047,11 +27088,10 @@ Various `.c', `.y', and `.h' files
      contains a `Makefile.in' file, which `configure' uses to generate
      a `Makefile'.  `Makefile.am' is used by GNU Automake to create
      `Makefile.in'.  The library functions from *note Library
-     Functions::, and the `igawk' program from *note Igawk Program::,
-     are included as ready-to-use files in the `gawk' distribution.
-     They are installed as part of the installation process.  The rest
-     of the programs in this Info file are available in appropriate
-     subdirectories of `awklib/eg'.
+     Functions::, are included as ready-to-use files in the `gawk'
+     distribution.  They are installed as part of the installation
+     process.  The rest of the programs in this Info file are available
+     in appropriate subdirectories of `awklib/eg'.
 
 `extension/*'
      The source code, manual pages, and infrastructure files for the
@@ -30984,20 +31024,20 @@ Index
 * --include option:                      Options.             (line 159)
 * --lint option <1>:                     Options.             (line 185)
 * --lint option:                         Command Line.        (line  20)
-* --lint-old option:                     Options.             (line 295)
+* --lint-old option:                     Options.             (line 293)
 * --load option:                         Options.             (line 173)
 * --non-decimal-data option <1>:         Nondecimal Data.     (line   6)
 * --non-decimal-data option:             Options.             (line 211)
 * --non-decimal-data option, strtonum() function and: Nondecimal Data.
                                                               (line  36)
-* --optimize option:                     Options.             (line 237)
-* --posix option:                        Options.             (line 254)
-* --posix option, --traditional option and: Options.          (line 273)
+* --optimize option:                     Options.             (line 235)
+* --posix option:                        Options.             (line 252)
+* --posix option, --traditional option and: Options.          (line 271)
 * --pretty-print option:                 Options.             (line 224)
 * --profile option <1>:                  Profiling.           (line  12)
-* --profile option:                      Options.             (line 242)
-* --re-interval option:                  Options.             (line 279)
-* --sandbox option:                      Options.             (line 286)
+* --profile option:                      Options.             (line 240)
+* --re-interval option:                  Options.             (line 277)
+* --sandbox option:                      Options.             (line 284)
 * --sandbox option, disabling system() function: I/O Functions.
                                                               (line  97)
 * --sandbox option, input redirection with getline: Getline.  (line  19)
@@ -31005,9 +31045,9 @@ Index
                                                               (line   6)
 * --source option:                       Options.             (line 117)
 * --traditional option:                  Options.             (line  81)
-* --traditional option, --posix option and: Options.          (line 273)
+* --traditional option, --posix option and: Options.          (line 271)
 * --use-lc-numeric option:               Options.             (line 219)
-* --version option:                      Options.             (line 300)
+* --version option:                      Options.             (line 298)
 * --with-whiny-user-strftime configuration option: Additional Configuration Options.
                                                               (line  35)
 * -b option:                             Options.             (line  68)
@@ -31020,26 +31060,26 @@ Index
 * -f option:                             Options.             (line  25)
 * -F option:                             Options.             (line  21)
 * -f option:                             Long.                (line  12)
-* -F option, -Ft sets FS to TAB:         Options.             (line 308)
+* -F option, -Ft sets FS to TAB:         Options.             (line 306)
 * -F option, command line:               Command Line Field Separator.
                                                               (line   6)
-* -f option, multiple uses:              Options.             (line 313)
+* -f option, multiple uses:              Options.             (line 311)
 * -g option:                             Options.             (line 147)
 * -h option:                             Options.             (line 154)
 * -i option:                             Options.             (line 159)
-* -L option:                             Options.             (line 295)
+* -L option:                             Options.             (line 293)
 * -l option:                             Options.             (line 173)
 * -M option:                             Options.             (line 205)
 * -N option:                             Options.             (line 219)
 * -n option:                             Options.             (line 211)
-* -O option:                             Options.             (line 237)
+* -O option:                             Options.             (line 235)
 * -o option:                             Options.             (line 224)
-* -P option:                             Options.             (line 254)
-* -p option:                             Options.             (line 242)
-* -r option:                             Options.             (line 279)
-* -S option:                             Options.             (line 286)
+* -P option:                             Options.             (line 252)
+* -p option:                             Options.             (line 240)
+* -r option:                             Options.             (line 277)
+* -S option:                             Options.             (line 284)
 * -v option:                             Assignment Options.  (line  12)
-* -V option:                             Options.             (line 300)
+* -V option:                             Options.             (line 298)
 * -v option:                             Options.             (line  32)
 * -W option:                             Options.             (line  46)
 * . (period), regexp operator:           Regexp Operators.    (line  44)
@@ -31312,7 +31352,7 @@ Index
 * awf (amazingly workable formatter) program: Glossary.       (line  24)
 * awk debugging, enabling:               Options.             (line 108)
 * awk language, POSIX version:           Assignment Ops.      (line 137)
-* awk profiling, enabling:               Options.             (line 242)
+* awk profiling, enabling:               Options.             (line 240)
 * awk programs <1>:                      Two Rules.           (line   6)
 * awk programs <2>:                      Executable Scripts.  (line   6)
 * awk programs:                          Getting Started.     (line  12)
@@ -31719,7 +31759,7 @@ Index
 * cosine:                                Numeric Functions.   (line  15)
 * counting:                              Wc Program.          (line   6)
 * csh utility:                           Statements/Lines.    (line  44)
-* csh utility, POSIXLY_CORRECT environment variable: Options. (line 355)
+* csh utility, POSIXLY_CORRECT environment variable: Options. (line 353)
 * csh utility, |& operator, comparison with: Two-way I/O.     (line  44)
 * ctime() user-defined function:         Function Example.    (line  73)
 * currency symbols, localization:        Explaining gettext.  (line 104)
@@ -31754,9 +31794,9 @@ Index
 * dark corner, exit statement:           Exit Statement.      (line  30)
 * dark corner, field separators:         Field Splitting Summary.
                                                               (line  46)
-* dark corner, FILENAME variable <1>:    Auto-set.            (line  90)
+* dark corner, FILENAME variable <1>:    Auto-set.            (line  98)
 * dark corner, FILENAME variable:        Getline Notes.       (line  19)
-* dark corner, FNR/NR variables:         Auto-set.            (line 301)
+* dark corner, FNR/NR variables:         Auto-set.            (line 309)
 * dark corner, format-control characters: Control Letters.    (line  18)
 * dark corner, FS as null string:        Single Character Fields.
                                                               (line  20)
@@ -31902,7 +31942,7 @@ Index
 * debugger, read commands from a file:   Debugger Info.       (line  96)
 * debugging awk programs:                Debugger.            (line   6)
 * debugging gawk, bug reports:           Bugs.                (line   9)
-* decimal point character, locale specific: Options.          (line 270)
+* decimal point character, locale specific: Options.          (line 268)
 * decrement operators:                   Increment Ops.       (line  35)
 * default keyword:                       Switch Statement.    (line   6)
 * Deifik, Scott <1>:                     Bugs.                (line  71)
@@ -31941,12 +31981,12 @@ Index
                                                               (line  81)
 * differences in awk and gawk, command line directories: Command line directories.
                                                               (line   6)
-* differences in awk and gawk, ERRNO variable: Auto-set.      (line  74)
+* differences in awk and gawk, ERRNO variable: Auto-set.      (line  82)
 * differences in awk and gawk, error messages: Special FD.    (line  16)
 * differences in awk and gawk, FIELDWIDTHS variable: User-modified.
                                                               (line  37)
 * differences in awk and gawk, FPAT variable: User-modified.  (line  43)
-* differences in awk and gawk, FUNCTAB variable: Auto-set.    (line 115)
+* differences in awk and gawk, FUNCTAB variable: Auto-set.    (line 123)
 * differences in awk and gawk, function arguments (gawk): Calling Built-in.
                                                               (line  16)
 * differences in awk and gawk, getline command: Getline.      (line  19)
@@ -31969,7 +32009,7 @@ Index
                                                               (line 260)
 * differences in awk and gawk, print/printf statements: Format Modifiers.
                                                               (line  13)
-* differences in awk and gawk, PROCINFO array: Auto-set.      (line 128)
+* differences in awk and gawk, PROCINFO array: Auto-set.      (line 136)
 * differences in awk and gawk, read timeouts: Read Timeout.   (line   6)
 * differences in awk and gawk, record separators: awk split records.
                                                               (line 124)
@@ -31979,7 +32019,7 @@ Index
                                                               (line  26)
 * differences in awk and gawk, RS/RT variables: gawk split records.
                                                               (line  58)
-* differences in awk and gawk, RT variable: Auto-set.         (line 257)
+* differences in awk and gawk, RT variable: Auto-set.         (line 265)
 * differences in awk and gawk, single-character fields: Single Character Fields.
                                                               (line   6)
 * differences in awk and gawk, split() function: String Functions.
@@ -31987,7 +32027,7 @@ Index
 * differences in awk and gawk, strings:  Scalar Constants.    (line  20)
 * differences in awk and gawk, strings, storing: gawk split records.
                                                               (line  77)
-* differences in awk and gawk, SYMTAB variable: Auto-set.     (line 261)
+* differences in awk and gawk, SYMTAB variable: Auto-set.     (line 269)
 * differences in awk and gawk, TEXTDOMAIN variable: User-modified.
                                                               (line 152)
 * differences in awk and gawk, trunc-mod operation: Arithmetic Ops.
@@ -32003,6 +32043,7 @@ Index
 * display debugger command:              Viewing And Changing Data.
                                                               (line   8)
 * display debugger options:              Debugger Info.       (line  57)
+* div:                                   Numeric Functions.   (line  18)
 * division:                              Arithmetic Ops.      (line  44)
 * do-while statement:                    Do Statement.        (line   6)
 * do-while statement, use of regexps in: Regexp Usage.        (line  19)
@@ -32027,8 +32068,8 @@ Index
 * dynamically loaded extensions:         Dynamic Extensions.  (line   6)
 * e debugger command (alias for enable): Breakpoint Control.  (line  73)
 * EBCDIC:                                Ordinal Functions.   (line  45)
-* effective group ID of gawk user:       Auto-set.            (line 133)
-* effective user ID of gawk user:        Auto-set.            (line 137)
+* effective group ID of gawk user:       Auto-set.            (line 141)
+* effective user ID of gawk user:        Auto-set.            (line 145)
 * egrep utility <1>:                     Egrep Program.       (line   6)
 * egrep utility:                         Bracket Expressions. (line  24)
 * egrep.awk program:                     Egrep Program.       (line  54)
@@ -32084,13 +32125,13 @@ Index
                                                               (line  11)
 * EREs (Extended Regular Expressions):   Bracket Expressions. (line  24)
 * ERRNO variable <1>:                    TCP/IP Networking.   (line  54)
-* ERRNO variable:                        Auto-set.            (line  74)
+* ERRNO variable:                        Auto-set.            (line  82)
 * ERRNO variable, with BEGINFILE pattern: BEGINFILE/ENDFILE.  (line  26)
 * ERRNO variable, with close() function: Close Files And Pipes.
                                                               (line 139)
 * ERRNO variable, with getline command:  Getline.             (line  19)
 * error handling:                        Special FD.          (line  16)
-* error handling, ERRNO variable and:    Auto-set.            (line  74)
+* error handling, ERRNO variable and:    Auto-set.            (line  82)
 * error output:                          Special FD.          (line   6)
 * escape processing, gsub()/gensub()/sub() functions: Gory Details.
                                                               (line   6)
@@ -32123,10 +32164,10 @@ Index
 * exit status, of VMS:                   VMS Running.         (line  29)
 * exit the debugger:                     Miscellaneous Debugger Commands.
                                                               (line  99)
-* exp:                                   Numeric Functions.   (line  18)
+* exp:                                   Numeric Functions.   (line  33)
 * expand utility:                        Very Simple.         (line  69)
 * Expat XML parser library:              gawkextlib.          (line  35)
-* exponent:                              Numeric Functions.   (line  18)
+* exponent:                              Numeric Functions.   (line  33)
 * expressions:                           Expressions.         (line   6)
 * expressions, as patterns:              Expression Patterns. (line   6)
 * expressions, assignment:               Assignment Ops.      (line   6)
@@ -32144,7 +32185,7 @@ Index
                                                               (line   6)
 * extension API version:                 Extension Versioning.
                                                               (line   6)
-* extension API, version number:         Auto-set.            (line 224)
+* extension API, version number:         Auto-set.            (line 232)
 * extension example:                     Extension Example.   (line   6)
 * extension registration:                Registration Functions.
                                                               (line   6)
@@ -32223,7 +32264,7 @@ Index
 * file names, distinguishing:            Auto-set.            (line  56)
 * file names, in compatibility mode:     Special Caveats.     (line   9)
 * file names, standard streams in gawk:  Special FD.          (line  46)
-* FILENAME variable <1>:                 Auto-set.            (line  90)
+* FILENAME variable <1>:                 Auto-set.            (line  98)
 * FILENAME variable:                     Reading Files.       (line   6)
 * FILENAME variable, getline, setting with: Getline Notes.    (line  19)
 * filenames, assignments as:             Ignoring Assigns.    (line   6)
@@ -32291,9 +32332,9 @@ Index
 * flush buffered output:                 I/O Functions.       (line  28)
 * fnmatch() extension function:          Extension Sample Fnmatch.
                                                               (line  12)
-* FNR variable <1>:                      Auto-set.            (line  99)
+* FNR variable <1>:                      Auto-set.            (line 107)
 * FNR variable:                          Records.             (line   6)
-* FNR variable, changing:                Auto-set.            (line 301)
+* FNR variable, changing:                Auto-set.            (line 309)
 * for statement:                         For Statement.       (line   6)
 * for statement, looping over arrays:    Scanning an Array.   (line  20)
 * fork() extension function:             Extension Sample Fork.
@@ -32330,7 +32371,7 @@ Index
 * FS variable, --field-separator option and: Options.         (line  21)
 * FS variable, as null string:           Single Character Fields.
                                                               (line  20)
-* FS variable, as TAB character:         Options.             (line 266)
+* FS variable, as TAB character:         Options.             (line 264)
 * FS variable, changing value of:        Field Separators.    (line  35)
 * FS variable, running awk programs and: Cut Program.         (line  68)
 * FS variable, setting from command line: Command Line Field Separator.
@@ -32343,7 +32384,7 @@ Index
 * FSF (Free Software Foundation):        Manual History.      (line   6)
 * fts() extension function:              Extension Sample File Functions.
                                                               (line  61)
-* FUNCTAB array:                         Auto-set.            (line 115)
+* FUNCTAB array:                         Auto-set.            (line 123)
 * function calls:                        Function Calls.      (line   6)
 * function calls, indirect:              Indirect Calls.      (line   6)
 * function definition example:           Function Example.    (line   6)
@@ -32393,7 +32434,7 @@ Index
 * G-d:                                   Acknowledgments.     (line  82)
 * Garfinkle, Scott:                      Contributors.        (line  34)
 * gawk program, dynamic profiling:       Profiling.           (line 179)
-* gawk version:                          Auto-set.            (line 199)
+* gawk version:                          Auto-set.            (line 207)
 * gawk, ARGIND variable in:              Other Arguments.     (line  12)
 * gawk, awk and <1>:                     This Manual.         (line  14)
 * gawk, awk and:                         Preface.             (line  23)
@@ -32414,13 +32455,13 @@ Index
 * gawk, distribution:                    Distribution contents.
                                                               (line   6)
 * gawk, ERRNO variable in <1>:           TCP/IP Networking.   (line  54)
-* gawk, ERRNO variable in <2>:           Auto-set.            (line  74)
+* gawk, ERRNO variable in <2>:           Auto-set.            (line  82)
 * gawk, ERRNO variable in <3>:           BEGINFILE/ENDFILE.   (line  26)
 * gawk, ERRNO variable in <4>:           Close Files And Pipes.
                                                               (line 139)
 * gawk, ERRNO variable in:               Getline.             (line  19)
 * gawk, escape sequences:                Escape Sequences.    (line 124)
-* gawk, extensions, disabling:           Options.             (line 254)
+* gawk, extensions, disabling:           Options.             (line 252)
 * gawk, features, adding:                Adding Code.         (line   6)
 * gawk, features, advanced:              Advanced Features.   (line   6)
 * gawk, field separators and:            User-modified.       (line  71)
@@ -32431,7 +32472,7 @@ Index
 * gawk, FPAT variable in <1>:            User-modified.       (line  43)
 * gawk, FPAT variable in:                Splitting By Content.
                                                               (line  27)
-* gawk, FUNCTAB array in:                Auto-set.            (line 115)
+* gawk, FUNCTAB array in:                Auto-set.            (line 123)
 * gawk, function arguments and:          Calling Built-in.    (line  16)
 * gawk, hexadecimal numbers and:         Nondecimal-numbers.  (line  42)
 * gawk, IGNORECASE variable in <1>:      Array Sorting Functions.
@@ -32462,7 +32503,7 @@ Index
 * gawk, OS/2 version of:                 PC Using.            (line  16)
 * gawk, PROCINFO array in <1>:           Two-way I/O.         (line 117)
 * gawk, PROCINFO array in <2>:           Time Functions.      (line  47)
-* gawk, PROCINFO array in:               Auto-set.            (line 128)
+* gawk, PROCINFO array in:               Auto-set.            (line 136)
 * gawk, regexp constants and:            Using Constant Regexps.
                                                               (line  28)
 * gawk, regular expressions, case sensitivity: Case-sensitivity.
@@ -32470,18 +32511,18 @@ Index
 * gawk, regular expressions, operators:  GNU Regexp Operators.
                                                               (line   6)
 * gawk, regular expressions, precedence: Regexp Operators.    (line 162)
-* gawk, RT variable in <1>:              Auto-set.            (line 257)
+* gawk, RT variable in <1>:              Auto-set.            (line 265)
 * gawk, RT variable in <2>:              Multiple Line.       (line 129)
 * gawk, RT variable in:                  awk split records.   (line 124)
 * gawk, See Also awk:                    Preface.             (line  36)
 * gawk, source code, obtaining:          Getting.             (line   6)
 * gawk, splitting fields and:            Constant Size.       (line  88)
 * gawk, string-translation functions:    I18N Functions.      (line   6)
-* gawk, SYMTAB array in:                 Auto-set.            (line 261)
+* gawk, SYMTAB array in:                 Auto-set.            (line 269)
 * gawk, TEXTDOMAIN variable in:          User-modified.       (line 152)
 * gawk, timestamps:                      Time Functions.      (line   6)
 * gawk, uses for:                        Preface.             (line  36)
-* gawk, versions of, information about, printing: Options.    (line 300)
+* gawk, versions of, information about, printing: Options.    (line 298)
 * gawk, VMS version of:                  VMS Installation.    (line   6)
 * gawk, word-boundary operator:          GNU Regexp Operators.
                                                               (line  63)
@@ -32563,7 +32604,7 @@ Index
 * Grigera, Juan:                         Contributors.        (line  57)
 * group database, reading:               Group Functions.     (line   6)
 * group file:                            Group Functions.     (line   6)
-* group ID of gawk user:                 Auto-set.            (line 172)
+* group ID of gawk user:                 Auto-set.            (line 180)
 * groups, information about:             Group Functions.     (line   6)
 * gsub <1>:                              String Functions.    (line 139)
 * gsub:                                  Using Constant Regexps.
@@ -32662,7 +32703,7 @@ Index
 * installation, VMS:                     VMS Installation.    (line   6)
 * installing gawk:                       Installation.        (line   6)
 * instruction tracing, in debugger:      Debugger Info.       (line  89)
-* int:                                   Numeric Functions.   (line  23)
+* int:                                   Numeric Functions.   (line  38)
 * INT signal (MS-Windows):               Profiling.           (line 214)
 * integer array indices:                 Numeric Array Subscripts.
                                                               (line  31)
@@ -32792,7 +32833,7 @@ Index
 * lint checking, empty programs:         Command Line.        (line  16)
 * lint checking, issuing warnings:       Options.             (line 185)
 * lint checking, POSIXLY_CORRECT environment variable: Options.
-                                                              (line 340)
+                                                              (line 338)
 * lint checking, undefined functions:    Pass By Value/Reference.
                                                               (line  88)
 * LINT variable:                         User-modified.       (line  88)
@@ -32806,14 +32847,14 @@ Index
 * loading, extensions:                   Options.             (line 173)
 * local variables, in a function:        Variable Scope.      (line   6)
 * locale categories:                     Explaining gettext.  (line  81)
-* locale decimal point character:        Options.             (line 270)
+* locale decimal point character:        Options.             (line 268)
 * locale, definition of:                 Locales.             (line   6)
 * localization:                          I18N and L10N.       (line   6)
 * localization, See internationalization, localization: I18N and L10N.
                                                               (line   6)
-* log:                                   Numeric Functions.   (line  30)
+* log:                                   Numeric Functions.   (line  45)
 * log files, timestamps in:              Time Functions.      (line   6)
-* logarithm:                             Numeric Functions.   (line  30)
+* logarithm:                             Numeric Functions.   (line  45)
 * logical false/true:                    Truth Values.        (line   6)
 * logical operators, See Boolean expressions: Boolean Ops.    (line   6)
 * login information:                     Passwd Functions.    (line  16)
@@ -32854,7 +32895,7 @@ Index
 * mawk utility <3>:                      Concatenation.       (line  36)
 * mawk utility <4>:                      Getline/Pipe.        (line  62)
 * mawk utility:                          Escape Sequences.    (line 124)
-* maximum precision supported by MPFR library: Auto-set.      (line 213)
+* maximum precision supported by MPFR library: Auto-set.      (line 221)
 * McIlroy, Doug:                         Glossary.            (line 149)
 * McPhee, Patrick:                       Contributors.        (line 100)
 * message object files:                  Explaining gettext.  (line  42)
@@ -32867,7 +32908,7 @@ Index
 * messages from extensions:              Printing Messages.   (line   6)
 * metacharacters in regular expressions: Regexp Operators.    (line   6)
 * metacharacters, escape sequences for:  Escape Sequences.    (line 130)
-* minimum precision supported by MPFR library: Auto-set.      (line 216)
+* minimum precision supported by MPFR library: Auto-set.      (line 224)
 * mktime:                                Time Functions.      (line  25)
 * modifiers, in format specifiers:       Format Modifiers.    (line   6)
 * monetary information, localization:    Explaining gettext.  (line 104)
@@ -32890,7 +32931,7 @@ Index
 * networks, programming:                 TCP/IP Networking.   (line   6)
 * networks, support for:                 Special Network.     (line   6)
 * newlines <1>:                          Boolean Ops.         (line  67)
-* newlines <2>:                          Options.             (line 260)
+* newlines <2>:                          Options.             (line 258)
 * newlines:                              Statements/Lines.    (line   6)
 * newlines, as field separators:         Default Field Splitting.
                                                               (line   6)
@@ -32919,7 +32960,7 @@ Index
                                                               (line  47)
 * nexti debugger command:                Debugger Execution Control.
                                                               (line  49)
-* NF variable <1>:                       Auto-set.            (line 104)
+* NF variable <1>:                       Auto-set.            (line 112)
 * NF variable:                           Fields.              (line  33)
 * NF variable, decrementing:             Changing Fields.     (line 107)
 * ni debugger command (alias for nexti): Debugger Execution Control.
@@ -32928,9 +32969,9 @@ Index
 * non-existent array elements:           Reference to Elements.
                                                               (line  23)
 * not Boolean-logic operator:            Boolean Ops.         (line   6)
-* NR variable <1>:                       Auto-set.            (line 123)
+* NR variable <1>:                       Auto-set.            (line 131)
 * NR variable:                           Records.             (line   6)
-* NR variable, changing:                 Auto-set.            (line 301)
+* NR variable, changing:                 Auto-set.            (line 309)
 * null strings <1>:                      Basic Data Typing.   (line  26)
 * null strings <2>:                      Truth Values.        (line   6)
 * null strings <3>:                      Regexp Field Splitting.
@@ -33045,7 +33086,7 @@ Index
 * p debugger command (alias for print):  Viewing And Changing Data.
                                                               (line  36)
 * Papadopoulos, Panos:                   Contributors.        (line 128)
-* parent process ID of gawk process:     Auto-set.            (line 181)
+* parent process ID of gawk process:     Auto-set.            (line 189)
 * parentheses (), in a profile:          Profiling.           (line 146)
 * parentheses (), regexp operator:       Regexp Operators.    (line  80)
 * password file:                         Passwd Functions.    (line  16)
@@ -33112,7 +33153,7 @@ Index
 * portability, NF variable, decrementing: Changing Fields.    (line 115)
 * portability, operators:                Increment Ops.       (line  60)
 * portability, operators, not in POSIX awk: Precedence.       (line  98)
-* portability, POSIXLY_CORRECT environment variable: Options. (line 360)
+* portability, POSIXLY_CORRECT environment variable: Options. (line 358)
 * portability, substr() function:        String Functions.    (line 510)
 * portable object files <1>:             Translator i18n.     (line   6)
 * portable object files:                 Explaining gettext.  (line  37)
@@ -33161,11 +33202,11 @@ Index
 * POSIX awk, regular expressions and:    Regexp Operators.    (line 162)
 * POSIX awk, timestamps and:             Time Functions.      (line   6)
 * POSIX awk, | I/O operator and:         Getline/Pipe.        (line  55)
-* POSIX mode:                            Options.             (line 254)
+* POSIX mode:                            Options.             (line 252)
 * POSIX, awk and:                        Preface.             (line  23)
 * POSIX, gawk extensions not included in: POSIX/GNU.          (line   6)
 * POSIX, programs, implementing in awk:  Clones.              (line   6)
-* POSIXLY_CORRECT environment variable:  Options.             (line 340)
+* POSIXLY_CORRECT environment variable:  Options.             (line 338)
 * PREC variable:                         User-modified.       (line 124)
 * precedence <1>:                        Precedence.          (line   6)
 * precedence:                            Increment Ops.       (line  60)
@@ -33208,24 +33249,24 @@ Index
 * printing, unduplicated lines of text:  Uniq Program.        (line   6)
 * printing, user information:            Id Program.          (line   6)
 * private variables:                     Library Names.       (line  11)
-* process group idIDof gawk process:     Auto-set.            (line 175)
-* process ID of gawk process:            Auto-set.            (line 178)
+* process group idIDof gawk process:     Auto-set.            (line 183)
+* process ID of gawk process:            Auto-set.            (line 186)
 * processes, two-way communications with: Two-way I/O.        (line  23)
 * processing data:                       Basic High Level.    (line   6)
 * PROCINFO array <1>:                    Passwd Functions.    (line   6)
 * PROCINFO array <2>:                    Time Functions.      (line  47)
-* PROCINFO array:                        Auto-set.            (line 128)
+* PROCINFO array:                        Auto-set.            (line 136)
 * PROCINFO array, and communications via ptys: Two-way I/O.   (line 117)
 * PROCINFO array, and group membership:  Group Functions.     (line   6)
 * PROCINFO array, and user and group ID numbers: Id Program.  (line  15)
 * PROCINFO array, testing the field splitting: Passwd Functions.
                                                               (line 161)
-* PROCINFO array, uses:                  Auto-set.            (line 234)
+* PROCINFO array, uses:                  Auto-set.            (line 242)
 * PROCINFO, values of sorted_in:         Controlling Scanning.
                                                               (line  26)
 * profiling awk programs:                Profiling.           (line   6)
 * profiling awk programs, dynamically:   Profiling.           (line 179)
-* program identifiers:                   Auto-set.            (line 146)
+* program identifiers:                   Auto-set.            (line 154)
 * program, definition of:                Getting Started.     (line  21)
 * programmers, attractiveness of:        Two-way I/O.         (line   6)
 * programming conventions, --non-decimal-data option: Nondecimal Data.
@@ -33270,12 +33311,12 @@ Index
 * Rakitzis, Byron:                       History Sorting.     (line  25)
 * Ramey, Chet <1>:                       General Data Types.  (line   6)
 * Ramey, Chet:                           Acknowledgments.     (line  60)
-* rand:                                  Numeric Functions.   (line  34)
+* rand:                                  Numeric Functions.   (line  49)
 * random numbers, Cliff:                 Cliff Random Function.
                                                               (line   6)
 * random numbers, rand()/srand() functions: Numeric Functions.
-                                                              (line  34)
-* random numbers, seed of:               Numeric Functions.   (line  64)
+                                                              (line  49)
+* random numbers, seed of:               Numeric Functions.   (line  79)
 * range expressions (regexps):           Bracket Expressions. (line   6)
 * range patterns:                        Ranges.              (line   6)
 * range patterns, line continuation and: Ranges.              (line  65)
@@ -33345,7 +33386,7 @@ Index
                                                               (line  59)
 * regular expressions, gawk, command-line options: GNU Regexp Operators.
                                                               (line  70)
-* regular expressions, interval expressions and: Options.     (line 279)
+* regular expressions, interval expressions and: Options.     (line 277)
 * regular expressions, leftmost longest match: Leftmost Longest.
                                                               (line   6)
 * regular expressions, operators <1>:    Regexp Operators.    (line   6)
@@ -33385,7 +33426,7 @@ Index
 * right shift:                           Bitwise Functions.   (line  52)
 * right shift, bitwise:                  Bitwise Functions.   (line  32)
 * Ritchie, Dennis:                       Basic Data Typing.   (line  54)
-* RLENGTH variable:                      Auto-set.            (line 244)
+* RLENGTH variable:                      Auto-set.            (line 252)
 * RLENGTH variable, match() function and: String Functions.   (line 224)
 * Robbins, Arnold <1>:                   Future Extensions.   (line   6)
 * Robbins, Arnold <2>:                   Bugs.                (line  32)
@@ -33403,7 +33444,7 @@ Index
 * Robbins, Miriam <2>:                   Getline/Pipe.        (line  39)
 * Robbins, Miriam:                       Acknowledgments.     (line  82)
 * Rommel, Kai Uwe:                       Contributors.        (line  42)
-* round to nearest integer:              Numeric Functions.   (line  23)
+* round to nearest integer:              Numeric Functions.   (line  38)
 * round() user-defined function:         Round Function.      (line  16)
 * rounding numbers:                      Round Function.      (line   6)
 * ROUNDMODE variable:                    User-modified.       (line 128)
@@ -33411,9 +33452,9 @@ Index
 * RS variable:                           awk split records.   (line  12)
 * RS variable, multiline records and:    Multiple Line.       (line  17)
 * rshift:                                Bitwise Functions.   (line  52)
-* RSTART variable:                       Auto-set.            (line 250)
+* RSTART variable:                       Auto-set.            (line 258)
 * RSTART variable, match() function and: String Functions.    (line 224)
-* RT variable <1>:                       Auto-set.            (line 257)
+* RT variable <1>:                       Auto-set.            (line 265)
 * RT variable <2>:                       Multiple Line.       (line 129)
 * RT variable:                           awk split records.   (line 124)
 * Rubin, Paul <1>:                       Contributors.        (line  15)
@@ -33426,14 +33467,14 @@ Index
                                                               (line  68)
 * sample debugging session:              Sample Debugging Session.
                                                               (line   6)
-* sandbox mode:                          Options.             (line 286)
+* sandbox mode:                          Options.             (line 284)
 * save debugger options:                 Debugger Info.       (line  84)
 * scalar or array:                       Type Functions.      (line  11)
 * scalar values:                         Basic Data Typing.   (line  13)
 * scanning arrays:                       Scanning an Array.   (line   6)
 * scanning multidimensional arrays:      Multiscanning.       (line  11)
 * Schorr, Andrew <1>:                    Contributors.        (line 133)
-* Schorr, Andrew <2>:                    Auto-set.            (line 284)
+* Schorr, Andrew <2>:                    Auto-set.            (line 292)
 * Schorr, Andrew:                        Acknowledgments.     (line  60)
 * Schreiber, Bert:                       Acknowledgments.     (line  38)
 * Schreiber, Rita:                       Acknowledgments.     (line  38)
@@ -33453,7 +33494,7 @@ Index
 * sed utility <2>:                       Simple Sed.          (line   6)
 * sed utility:                           Field Splitting Summary.
                                                               (line  46)
-* seeding random number generator:       Numeric Functions.   (line  64)
+* seeding random number generator:       Numeric Functions.   (line  79)
 * semicolon (;), AWKPATH variable and:   PC Using.            (line  10)
 * semicolon (;), separating statements in actions <1>: Statements.
                                                               (line  10)
@@ -33518,7 +33559,7 @@ Index
                                                               (line 110)
 * sidebar, Changing FS Does Not Affect the Fields: Field Splitting Summary.
                                                               (line  38)
-* sidebar, Changing NR and FNR:          Auto-set.            (line 299)
+* sidebar, Changing NR and FNR:          Auto-set.            (line 307)
 * sidebar, Controlling Output Buffering with system(): I/O Functions.
                                                               (line 138)
 * sidebar, Escape Sequences for Metacharacters: Escape Sequences.
@@ -33555,8 +33596,8 @@ Index
 * SIGUSR1 signal, for dynamic profiling: Profiling.           (line 188)
 * silent debugger command:               Debugger Execution Control.
                                                               (line  10)
-* sin:                                   Numeric Functions.   (line  75)
-* sine:                                  Numeric Functions.   (line  75)
+* sin:                                   Numeric Functions.   (line  90)
+* sine:                                  Numeric Functions.   (line  90)
 * single quote ('):                      One-shot.            (line  15)
 * single quote (') in gawk command lines: Long.               (line  33)
 * single quote ('), in shell commands:   Quoting.             (line  48)
@@ -33606,10 +33647,10 @@ Index
 * sprintf() function, OFMT variable and: User-modified.       (line 114)
 * sprintf() function, print/printf statements and: Round Function.
                                                               (line   6)
-* sqrt:                                  Numeric Functions.   (line  78)
+* sqrt:                                  Numeric Functions.   (line  93)
 * square brackets ([]), regexp operator: Regexp Operators.    (line  56)
-* square root:                           Numeric Functions.   (line  78)
-* srand:                                 Numeric Functions.   (line  82)
+* square root:                           Numeric Functions.   (line  93)
+* srand:                                 Numeric Functions.   (line  97)
 * stack frame:                           Debugging Terms.     (line  10)
 * Stallman, Richard <1>:                 Glossary.            (line 296)
 * Stallman, Richard <2>:                 Contributors.        (line  23)
@@ -33681,9 +33722,9 @@ Index
 * substr:                                String Functions.    (line 479)
 * substring:                             String Functions.    (line 479)
 * Sumner, Andrew:                        Other Versions.      (line  64)
-* supplementary groups of gawk process:  Auto-set.            (line 229)
+* supplementary groups of gawk process:  Auto-set.            (line 237)
 * switch statement:                      Switch Statement.    (line   6)
-* SYMTAB array:                          Auto-set.            (line 261)
+* SYMTAB array:                          Auto-set.            (line 269)
 * syntactic ambiguity: /= operator vs. /=.../ regexp constant: Assignment Ops.
                                                               (line 148)
 * system:                                I/O Functions.       (line  75)
@@ -33861,10 +33902,10 @@ Index
 * variables, uninitialized, as array subscripts: Uninitialized Subscripts.
                                                               (line   6)
 * variables, user-defined:               Variables.           (line   6)
-* version of gawk:                       Auto-set.            (line 199)
-* version of gawk extension API:         Auto-set.            (line 224)
-* version of GNU MP library:             Auto-set.            (line 210)
-* version of GNU MPFR library:           Auto-set.            (line 206)
+* version of gawk:                       Auto-set.            (line 207)
+* version of gawk extension API:         Auto-set.            (line 232)
+* version of GNU MP library:             Auto-set.            (line 218)
+* version of GNU MPFR library:           Auto-set.            (line 214)
 * vertical bar (|):                      Regexp Operators.    (line  70)
 * vertical bar (|), | operator (I/O) <1>: Precedence.         (line  65)
 * vertical bar (|), | operator (I/O):    Getline/Pipe.        (line   9)
@@ -33898,7 +33939,7 @@ Index
 * whitespace, as field separators:       Default Field Splitting.
                                                               (line   6)
 * whitespace, functions, calling:        Calling Built-in.    (line  10)
-* whitespace, newlines as:               Options.             (line 260)
+* whitespace, newlines as:               Options.             (line 258)
 * Williams, Kent:                        Contributors.        (line  34)
 * Woehlke, Matthew:                      Contributors.        (line  79)
 * Woods, John:                           Contributors.        (line  27)
@@ -33992,511 +34033,511 @@ Node: Intro Summary109875
 Node: Invoking Gawk110641
 Node: Command Line112156
 Node: Options112947
-Ref: Options-Footnote-1128776
-Node: Other Arguments128801
-Node: Naming Standard Input131463
-Node: Environment Variables132557
-Node: AWKPATH Variable133115
-Ref: AWKPATH Variable-Footnote-1135987
-Ref: AWKPATH Variable-Footnote-2136032
-Node: AWKLIBPATH Variable136292
-Node: Other Environment Variables137051
-Node: Exit Status140706
-Node: Include Files141381
-Node: Loading Shared Libraries144959
-Node: Obsolete146343
-Node: Undocumented147040
-Node: Invoking Summary147307
-Node: Regexp148887
-Node: Regexp Usage150337
-Node: Escape Sequences152370
-Node: Regexp Operators158037
-Ref: Regexp Operators-Footnote-1165517
-Ref: Regexp Operators-Footnote-2165664
-Node: Bracket Expressions165762
-Ref: table-char-classes167652
-Node: GNU Regexp Operators170592
-Node: Case-sensitivity174315
-Ref: Case-sensitivity-Footnote-1177207
-Ref: Case-sensitivity-Footnote-2177442
-Node: Leftmost Longest177550
-Node: Computed Regexps178751
-Node: Regexp Summary182123
-Node: Reading Files183594
-Node: Records185686
-Node: awk split records186429
-Node: gawk split records191287
-Ref: gawk split records-Footnote-1195808
-Node: Fields195845
-Ref: Fields-Footnote-1198809
-Node: Nonconstant Fields198895
-Ref: Nonconstant Fields-Footnote-1201125
-Node: Changing Fields201327
-Node: Field Separators207281
-Node: Default Field Splitting209983
-Node: Regexp Field Splitting211100
-Node: Single Character Fields214441
-Node: Command Line Field Separator215500
-Node: Full Line Fields218842
-Ref: Full Line Fields-Footnote-1219350
-Node: Field Splitting Summary219396
-Ref: Field Splitting Summary-Footnote-1222495
-Node: Constant Size222596
-Node: Splitting By Content227203
-Ref: Splitting By Content-Footnote-1230953
-Node: Multiple Line230993
-Ref: Multiple Line-Footnote-1236849
-Node: Getline237028
-Node: Plain Getline239244
-Node: Getline/Variable241339
-Node: Getline/File242486
-Node: Getline/Variable/File243870
-Ref: Getline/Variable/File-Footnote-1245469
-Node: Getline/Pipe245556
-Node: Getline/Variable/Pipe248255
-Node: Getline/Coprocess249362
-Node: Getline/Variable/Coprocess250614
-Node: Getline Notes251351
-Node: Getline Summary254155
-Ref: table-getline-variants254563
-Node: Read Timeout255475
-Ref: Read Timeout-Footnote-1259302
-Node: Command line directories259360
-Node: Input Summary260264
-Node: Input Exercises263401
-Node: Printing264134
-Node: Print265856
-Node: Print Examples267197
-Node: Output Separators269976
-Node: OFMT271992
-Node: Printf273350
-Node: Basic Printf274256
-Node: Control Letters275795
-Node: Format Modifiers279647
-Node: Printf Examples285674
-Node: Redirection288138
-Node: Special Files295110
-Node: Special FD295641
-Ref: Special FD-Footnote-1299265
-Node: Special Network299339
-Node: Special Caveats300189
-Node: Close Files And Pipes300985
-Ref: Close Files And Pipes-Footnote-1308146
-Ref: Close Files And Pipes-Footnote-2308294
-Node: Output Summary308444
-Node: Output exercises309441
-Node: Expressions310121
-Node: Values311306
-Node: Constants311982
-Node: Scalar Constants312662
-Ref: Scalar Constants-Footnote-1313521
-Node: Nondecimal-numbers313771
-Node: Regexp Constants316771
-Node: Using Constant Regexps317246
-Node: Variables320316
-Node: Using Variables320971
-Node: Assignment Options322695
-Node: Conversion324570
-Node: Strings And Numbers325094
-Ref: Strings And Numbers-Footnote-1328156
-Node: Locale influences conversions328265
-Ref: table-locale-affects330982
-Node: All Operators331570
-Node: Arithmetic Ops332200
-Node: Concatenation334705
-Ref: Concatenation-Footnote-1337501
-Node: Assignment Ops337621
-Ref: table-assign-ops342604
-Node: Increment Ops343921
-Node: Truth Values and Conditions347359
-Node: Truth Values348442
-Node: Typing and Comparison349491
-Node: Variable Typing350284
-Ref: Variable Typing-Footnote-1354184
-Node: Comparison Operators354306
-Ref: table-relational-ops354716
-Node: POSIX String Comparison358266
-Ref: POSIX String Comparison-Footnote-1359350
-Node: Boolean Ops359488
-Ref: Boolean Ops-Footnote-1363558
-Node: Conditional Exp363649
-Node: Function Calls365376
-Node: Precedence369256
-Node: Locales372925
-Node: Expressions Summary374556
-Node: Patterns and Actions377097
-Node: Pattern Overview378213
-Node: Regexp Patterns379890
-Node: Expression Patterns380433
-Node: Ranges384214
-Node: BEGIN/END387320
-Node: Using BEGIN/END388082
-Ref: Using BEGIN/END-Footnote-1390818
-Node: I/O And BEGIN/END390924
-Node: BEGINFILE/ENDFILE393209
-Node: Empty396140
-Node: Using Shell Variables396457
-Node: Action Overview398740
-Node: Statements401067
-Node: If Statement402915
-Node: While Statement404413
-Node: Do Statement406457
-Node: For Statement407613
-Node: Switch Statement410765
-Node: Break Statement412868
-Node: Continue Statement414923
-Node: Next Statement416716
-Node: Nextfile Statement419106
-Node: Exit Statement421761
-Node: Built-in Variables424165
-Node: User-modified425292
-Ref: User-modified-Footnote-1432981
-Node: Auto-set433043
-Ref: Auto-set-Footnote-1445625
-Ref: Auto-set-Footnote-2445830
-Node: ARGC and ARGV445886
-Node: Pattern Action Summary449740
-Node: Arrays451963
-Node: Array Basics453512
-Node: Array Intro454338
-Ref: figure-array-elements456311
-Node: Reference to Elements458718
-Node: Assigning Elements460991
-Node: Array Example461482
-Node: Scanning an Array463214
-Node: Controlling Scanning466229
-Ref: Controlling Scanning-Footnote-1471402
-Node: Delete471718
-Ref: Delete-Footnote-1474483
-Node: Numeric Array Subscripts474540
-Node: Uninitialized Subscripts476723
-Node: Multidimensional478348
-Node: Multiscanning481441
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+Ref: POSIX Floating Point Problems-Footnote-1897084
+Node: Floating point summary897122
+Node: Dynamic Extensions899339
+Node: Extension Intro900891
+Node: Plugin License902156
+Node: Extension Mechanism Outline902841
+Ref: figure-load-extension903265
+Ref: figure-load-new-function904750
+Ref: figure-call-new-function905752
+Node: Extension API Description907736
+Node: Extension API Functions Introduction909186
+Node: General Data Types914051
+Ref: General Data Types-Footnote-1919744
+Node: Requesting Values920043
+Ref: table-value-types-returned920780
+Node: Memory Allocation Functions921738
+Ref: Memory Allocation Functions-Footnote-1924485
+Node: Constructor Functions924581
+Node: Registration Functions926339
+Node: Extension Functions927024
+Node: Exit Callback Functions929326
+Node: Extension Version String930575
+Node: Input Parsers931225
+Node: Output Wrappers941028
+Node: Two-way processors945544
+Node: Printing Messages947748
+Ref: Printing Messages-Footnote-1948825
+Node: Updating `ERRNO'948977
+Node: Accessing Parameters949716
+Node: Symbol Table Access950946
+Node: Symbol table by name951460
+Node: Symbol table by cookie953436
+Ref: Symbol table by cookie-Footnote-1957569
+Node: Cached values957632
+Ref: Cached values-Footnote-1961136
+Node: Array Manipulation961227
+Ref: Array Manipulation-Footnote-1962325
+Node: Array Data Types962364
+Ref: Array Data Types-Footnote-1965067
+Node: Array Functions965159
+Node: Flattening Arrays969033
+Node: Creating Arrays975885
+Node: Extension API Variables980616
+Node: Extension Versioning981252
+Node: Extension API Informational Variables983153
+Node: Extension API Boilerplate984239
+Node: Finding Extensions988043
+Node: Extension Example988603
+Node: Internal File Description989333
+Node: Internal File Ops993424
+Ref: Internal File Ops-Footnote-11004856
+Node: Using Internal File Ops1004996
+Ref: Using Internal File Ops-Footnote-11007343
+Node: Extension Samples1007611
+Node: Extension Sample File Functions1009135
+Node: Extension Sample Fnmatch1016703
+Node: Extension Sample Fork1018185
+Node: Extension Sample Inplace1019398
+Node: Extension Sample Ord1021073
+Node: Extension Sample Readdir1021909
+Ref: table-readdir-file-types1022765
+Node: Extension Sample Revout1023564
+Node: Extension Sample Rev2way1024155
+Node: Extension Sample Read write array1024896
+Node: Extension Sample Readfile1026775
+Node: Extension Sample API Tests1027875
+Node: Extension Sample Time1028400
+Node: gawkextlib1029715
+Node: Extension summary1032528
+Node: Extension Exercises1036221
+Node: Language History1036943
+Node: V7/SVR3.11038586
+Node: SVR41040906
+Node: POSIX1042348
+Node: BTL1043734
+Node: POSIX/GNU1044468
+Node: Feature History1050067
+Node: Common Extensions1063197
+Node: Ranges and Locales1064509
+Ref: Ranges and Locales-Footnote-11069126
+Ref: Ranges and Locales-Footnote-21069153
+Ref: Ranges and Locales-Footnote-31069387
+Node: Contributors1069608
+Node: History summary1075033
+Node: Installation1076402
+Node: Gawk Distribution1077353
+Node: Getting1077837
+Node: Extracting1078661
+Node: Distribution contents1080303
+Node: Unix Installation1086073
+Node: Quick Installation1086690
+Node: Additional Configuration Options1089132
+Node: Configuration Philosophy1090870
+Node: Non-Unix Installation1093221
+Node: PC Installation1093679
+Node: PC Binary Installation1094990
+Node: PC Compiling1096838
+Ref: PC Compiling-Footnote-11099837
+Node: PC Testing1099942
+Node: PC Using1101118
+Node: Cygwin1105276
+Node: MSYS1106085
+Node: VMS Installation1106599
+Node: VMS Compilation1107395
+Ref: VMS Compilation-Footnote-11108617
+Node: VMS Dynamic Extensions1108675
+Node: VMS Installation Details1110048
+Node: VMS Running1112300
+Node: VMS GNV1115134
+Node: VMS Old Gawk1115857
+Node: Bugs1116327
+Node: Other Versions1120331
+Node: Installation summary1126586
+Node: Notes1127642
+Node: Compatibility Mode1128507
+Node: Additions1129289
+Node: Accessing The Source1130214
+Node: Adding Code1131650
+Node: New Ports1137828
+Node: Derived Files1142309
+Ref: Derived Files-Footnote-11147390
+Ref: Derived Files-Footnote-21147424
+Ref: Derived Files-Footnote-31148020
+Node: Future Extensions1148134
+Node: Implementation Limitations1148740
+Node: Extension Design1149988
+Node: Old Extension Problems1151142
+Ref: Old Extension Problems-Footnote-11152659
+Node: Extension New Mechanism Goals1152716
+Ref: Extension New Mechanism Goals-Footnote-11156076
+Node: Extension Other Design Decisions1156265
+Node: Extension Future Growth1158371
+Node: Old Extension Mechanism1159207
+Node: Notes summary1160969
+Node: Basic Concepts1162155
+Node: Basic High Level1162836
+Ref: figure-general-flow1163108
+Ref: figure-process-flow1163707
+Ref: Basic High Level-Footnote-11166936
+Node: Basic Data Typing1167121
+Node: Glossary1170449
+Node: Copying1195601
+Node: GNU Free Documentation License1233157
+Node: Index1258293
 
 End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index c6520ba3..1fb343de 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -51,7 +51,7 @@
 @c applies to and all the info about who's publishing this edition
 
 @c These apply across the board.
-@set UPDATE-MONTH June, 2014
+@set UPDATE-MONTH July, 2014
 @set VERSION 4.1
 @set PATCHLEVEL 1
 
@@ -3858,10 +3858,8 @@ No space is allowed between the @option{-o} and @var{file}, if
 @var{file} is supplied.
 
 @quotation NOTE
-Due to the way @command{gawk} has evolved, with this option
-your program is still executed.  This will change in the
-next major release such that @command{gawk} will only
-pretty-print the program and not run it.
+In the past, this option would also execute your program.
+This is no longer the case.
 @end quotation
 
 @item @option{-O}
@@ -4347,11 +4345,6 @@ two regexp matchers that @command{gawk} uses internally. (There aren't
 supposed to be differences, but occasionally theory and practice don't
 coordinate with each other.)
 
-@item GAWK_NO_PP_RUN
-If this variable exists, then when invoked with the @option{--pretty-print}
-option, @command{gawk} skips running the program.  This variable will
-not survive into the next major release.
-
 @item GAWK_STACKSIZE
 This specifies the amount by which @command{gawk} should grow its
 internal evaluation stack, when needed.
@@ -14524,10 +14517,18 @@ next file is opened.
 An associative array containing the values of the environment.  The array
 indices are the environment variable names; the elements are the values of
 the particular environment variables.  For example,
-@code{ENVIRON["HOME"]} might be @code{"/home/arnold"}.  Changing this array
-does not affect the environment passed on to any programs that
-@command{awk} may spawn via redirection or the @code{system()} function.
-(In a future version of @command{gawk}, it may do so.)
+@code{ENVIRON["HOME"]} might be @code{/home/arnold}.
+
+For POSIX @command{awk}, changing this array does not affect the
+environment passed on to any programs that @command{awk} may spawn via
+redirection or the @code{system()} function.
+
+However, beginning with version 4.2, if not in POSIX
+compatibility mode, @command{gawk} does update its own environment when
+@code{ENVIRON} is changed, thus changing the environment seen by programs
+that it creates.  You should therefore be especially careful if you
+modify @code{ENVIRON["PATH"]"}, which is the search path for finding
+executable programs.
 
 Some operating systems may not have environment variables.
 On such systems, the @code{ENVIRON} array is empty (except for
@@ -16613,6 +16614,23 @@ You can use @samp{pi = atan2(0, -1)} to retrieve the value of
 @cindex cosine
 Return the cosine of @var{x}, with @var{x} in radians.
 
+@item @code{div(@var{numerator}, @var{denominator}, @var{result})}
+@cindexawkfunc{div}
+@cindex div
+Perform integer division, similar to the standard C function of the
+same name.  First, truncate @code{numerator} and @code{denominator}
+towards zero, creating integer values.  Clear the @code{result}
+array, and then set @code{result["quotient"]} to the result of
+@samp{numerator / denominator}, truncated towards zero to an integer,
+and set @code{result["remainder"]} to the result of @samp{numerator %
+denominator}, truncated towards zero to an integer.  This function is
+primarily intended for use with arbitrary length integers; it avoids
+creating MPFR arbitrary precision floating-point values (@pxref{Arbitrary
+Precision Integers}).
+
+This function is a @code{gawk} extension.  It is not available in
+compatibility mode (@pxref{Options}).
+
 @item @code{exp(@var{x})}
 @cindexawkfunc{exp}
 @cindex exponent
@@ -27522,8 +27540,8 @@ When called this way, @command{gawk} ``pretty prints'' the program into
 @file{awkprof.out}, without any execution counts.
 
 @quotation NOTE
-The @option{--pretty-print} option still runs your program.
-This will change in the next major release.
+Once upon a time, the @option{--pretty-print} option would also run
+your program.  This is is no longer the case.
 @end quotation
 @c ENDOFRANGE awkp
 @c ENDOFRANGE proawk
@@ -30522,6 +30540,32 @@ to just use the following:
 gawk -M 'BEGIN @{ n = 13; print n % 2 @}'
 @end example
 
+When dividing two arbitrary precision integers with either
+@samp{/} or @samp{%}, the result is typically an arbitrary
+precision floating point value (unless the denominator evenly
+divides into the numerator).  In order to do integer division
+or remainder with arbitrary precision integers, use the built-in
+@code{div()} function (@pxref{Numeric Functions}).
+
+You can simulate the @code{div()} function in standard @command{awk}
+using this user-defined function:
+
+@example
+# div --- do integer division
+
+function div(numerator, denominator, result,    i)
+@{
+    split("", result)
+
+    numerator = int(numerator)
+    denominator = int(denominator)
+    result["quotient"] = int(numerator / denominator)
+    result["remainder"] = int(numerator % denominator)
+
+    return 0.0
+@}
+@end example
+
 @node POSIX Floating Point Problems
 @section Standards Versus Existing Practice
 
@@ -36615,6 +36659,8 @@ The generated Info file for
 The @command{troff} source for a manual page describing the @command{igawk}
 program presented in
 @ref{Igawk Program}.
+(Since @command{gawk} can do its own @code{@@include} processing,
+neither @command{igawk} nor @file{igawk.1} are installed.)
 
 @item doc/Makefile.in
 The input file used during the configuration process to generate the
@@ -36659,8 +36705,6 @@ source file for this @value{DOCUMENT}. It also contains a @file{Makefile.in} fil
 @file{Makefile.am} is used by GNU Automake to create @file{Makefile.in}.
 The library functions from
 @ref{Library Functions},
-and the @command{igawk} program from
-@ref{Igawk Program},
 are included as ready-to-use files in the @command{gawk} distribution.
 They are installed as part of the installation process.
 The rest of the programs in this @value{DOCUMENT} are available in appropriate
@@ -37706,9 +37750,10 @@ mail at the Internet address noted previously.
 
 If you find bugs in one of the non-Unix ports of @command{gawk}, please send
 an electronic mail message to the person who maintains that port.  They
-are named in the following list, as well as in the @file{README} file in the @command{gawk}
-distribution.  Information in the @file{README} file should be considered
-authoritative if it conflicts with this @value{DOCUMENT}.
+are named in the following list, as well as in the @file{README} file
+in the @command{gawk} distribution.  Information in the @file{README}
+file should be considered authoritative if it conflicts with this
+@value{DOCUMENT}.
 
 The people maintaining the non-Unix ports of @command{gawk} are
 as follows:
@@ -37736,7 +37781,8 @@ John Malmberg, @EMAIL{wb8tyw@@qsl.net,wb8tyw at qsl.net}.
 @end multitable
 
 If your bug is also reproducible under Unix, please send a copy of your
-report to the @EMAIL{bug-gawk@@gnu.org,bug-gawk at gnu dot org} email list as well.
+report to the @EMAIL{bug-gawk@@gnu.org,bug-gawk at gnu dot org} email
+list as well.
 @c ENDOFRANGE dbugg
 @c ENDOFRANGE tblgawb
 
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index d485a50d..93139a04 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -46,7 +46,7 @@
 @c applies to and all the info about who's publishing this edition
 
 @c These apply across the board.
-@set UPDATE-MONTH June, 2014
+@set UPDATE-MONTH July, 2014
 @set VERSION 4.1
 @set PATCHLEVEL 1
 
@@ -3786,10 +3786,8 @@ No space is allowed between the @option{-o} and @var{file}, if
 @var{file} is supplied.
 
 @quotation NOTE
-Due to the way @command{gawk} has evolved, with this option
-your program is still executed.  This will change in the
-next major release such that @command{gawk} will only
-pretty-print the program and not run it.
+In the past, this option would also execute your program.
+This is no longer the case.
 @end quotation
 
 @item @option{-O}
@@ -4275,11 +4273,6 @@ two regexp matchers that @command{gawk} uses internally. (There aren't
 supposed to be differences, but occasionally theory and practice don't
 coordinate with each other.)
 
-@item GAWK_NO_PP_RUN
-If this variable exists, then when invoked with the @option{--pretty-print}
-option, @command{gawk} skips running the program.  This variable will
-not survive into the next major release.
-
 @item GAWK_STACKSIZE
 This specifies the amount by which @command{gawk} should grow its
 internal evaluation stack, when needed.
@@ -13875,10 +13868,18 @@ next file is opened.
 An associative array containing the values of the environment.  The array
 indices are the environment variable names; the elements are the values of
 the particular environment variables.  For example,
-@code{ENVIRON["HOME"]} might be @code{"/home/arnold"}.  Changing this array
-does not affect the environment passed on to any programs that
-@command{awk} may spawn via redirection or the @code{system()} function.
-(In a future version of @command{gawk}, it may do so.)
+@code{ENVIRON["HOME"]} might be @code{/home/arnold}.
+
+For POSIX @command{awk}, changing this array does not affect the
+environment passed on to any programs that @command{awk} may spawn via
+redirection or the @code{system()} function.
+
+However, beginning with version 4.2, if not in POSIX
+compatibility mode, @command{gawk} does update its own environment when
+@code{ENVIRON} is changed, thus changing the environment seen by programs
+that it creates.  You should therefore be especially careful if you
+modify @code{ENVIRON["PATH"]"}, which is the search path for finding
+executable programs.
 
 Some operating systems may not have environment variables.
 On such systems, the @code{ENVIRON} array is empty (except for
@@ -15918,6 +15919,23 @@ You can use @samp{pi = atan2(0, -1)} to retrieve the value of
 @cindex cosine
 Return the cosine of @var{x}, with @var{x} in radians.
 
+@item @code{div(@var{numerator}, @var{denominator}, @var{result})}
+@cindexawkfunc{div}
+@cindex div
+Perform integer division, similar to the standard C function of the
+same name.  First, truncate @code{numerator} and @code{denominator}
+towards zero, creating integer values.  Clear the @code{result}
+array, and then set @code{result["quotient"]} to the result of
+@samp{numerator / denominator}, truncated towards zero to an integer,
+and set @code{result["remainder"]} to the result of @samp{numerator %
+denominator}, truncated towards zero to an integer.  This function is
+primarily intended for use with arbitrary length integers; it avoids
+creating MPFR arbitrary precision floating-point values (@pxref{Arbitrary
+Precision Integers}).
+
+This function is a @code{gawk} extension.  It is not available in
+compatibility mode (@pxref{Options}).
+
 @item @code{exp(@var{x})}
 @cindexawkfunc{exp}
 @cindex exponent
@@ -26637,8 +26655,8 @@ When called this way, @command{gawk} ``pretty prints'' the program into
 @file{awkprof.out}, without any execution counts.
 
 @quotation NOTE
-The @option{--pretty-print} option still runs your program.
-This will change in the next major release.
+Once upon a time, the @option{--pretty-print} option would also run
+your program.  This is is no longer the case.
 @end quotation
 @c ENDOFRANGE awkp
 @c ENDOFRANGE proawk
@@ -29637,6 +29655,32 @@ to just use the following:
 gawk -M 'BEGIN @{ n = 13; print n % 2 @}'
 @end example
 
+When dividing two arbitrary precision integers with either
+@samp{/} or @samp{%}, the result is typically an arbitrary
+precision floating point value (unless the denominator evenly
+divides into the numerator).  In order to do integer division
+or remainder with arbitrary precision integers, use the built-in
+@code{div()} function (@pxref{Numeric Functions}).
+
+You can simulate the @code{div()} function in standard @command{awk}
+using this user-defined function:
+
+@example
+# div --- do integer division
+
+function div(numerator, denominator, result,    i)
+@{
+    split("", result)
+
+    numerator = int(numerator)
+    denominator = int(denominator)
+    result["quotient"] = int(numerator / denominator)
+    result["remainder"] = int(numerator % denominator)
+
+    return 0.0
+@}
+@end example
+
 @node POSIX Floating Point Problems
 @section Standards Versus Existing Practice
 
@@ -35730,6 +35774,8 @@ The generated Info file for
 The @command{troff} source for a manual page describing the @command{igawk}
 program presented in
 @ref{Igawk Program}.
+(Since @command{gawk} can do its own @code{@@include} processing,
+neither @command{igawk} nor @file{igawk.1} are installed.)
 
 @item doc/Makefile.in
 The input file used during the configuration process to generate the
@@ -35774,8 +35820,6 @@ source file for this @value{DOCUMENT}. It also contains a @file{Makefile.in} fil
 @file{Makefile.am} is used by GNU Automake to create @file{Makefile.in}.
 The library functions from
 @ref{Library Functions},
-and the @command{igawk} program from
-@ref{Igawk Program},
 are included as ready-to-use files in the @command{gawk} distribution.
 They are installed as part of the installation process.
 The rest of the programs in this @value{DOCUMENT} are available in appropriate
@@ -36821,9 +36865,10 @@ mail at the Internet address noted previously.
 
 If you find bugs in one of the non-Unix ports of @command{gawk}, please send
 an electronic mail message to the person who maintains that port.  They
-are named in the following list, as well as in the @file{README} file in the @command{gawk}
-distribution.  Information in the @file{README} file should be considered
-authoritative if it conflicts with this @value{DOCUMENT}.
+are named in the following list, as well as in the @file{README} file
+in the @command{gawk} distribution.  Information in the @file{README}
+file should be considered authoritative if it conflicts with this
+@value{DOCUMENT}.
 
 The people maintaining the non-Unix ports of @command{gawk} are
 as follows:
@@ -36851,7 +36896,8 @@ John Malmberg, @EMAIL{wb8tyw@@qsl.net,wb8tyw at qsl.net}.
 @end multitable
 
 If your bug is also reproducible under Unix, please send a copy of your
-report to the @EMAIL{bug-gawk@@gnu.org,bug-gawk at gnu dot org} email list as well.
+report to the @EMAIL{bug-gawk@@gnu.org,bug-gawk at gnu dot org} email
+list as well.
 @c ENDOFRANGE dbugg
 @c ENDOFRANGE tblgawb
 
diff --git a/main.c b/main.c
index f76608c9..7f1595b8 100644
--- a/main.c
+++ b/main.c
@@ -741,9 +741,8 @@ out:
 
 	if (do_debug)
 		debug_prog(code_block);
-	else if (do_pretty_print && ! do_debug && getenv("GAWK_NO_PP_RUN") != NULL)
-		/* hack to run pretty printer only. need a better solution */
-		;
+	else if (do_pretty_print && ! do_profile)
+		;	/* run pretty printer only. */
 	else
 		interpret(code_block);
 
@@ -1127,6 +1126,10 @@ load_environ()
 	 */
 	path_environ("AWKPATH", defpath);
 	path_environ("AWKLIBPATH", deflibpath);
+
+	/* set up array functions */
+	init_env_array(ENVIRON_node);
+
 	return ENVIRON_node;
 }
 
diff --git a/mpfr.c b/mpfr.c
index cdd64b51..3c7cb5d8 100644
--- a/mpfr.c
+++ b/mpfr.c
@@ -1175,6 +1175,93 @@ do_mpfr_srand(int nargs)
 	return res;
 }
 
+/* do_mpfr_div --- do integer division, return quotient and remainder in dest array */
+
+/*
+ * We define the semantics as:
+ * 	numerator = int(numerator)
+ *	denominator = int(denonmator)
+ *	quotient = int(numerator / denomator)
+ *	remainder = int(numerator % denomator)
+ */
+
+NODE *
+do_mpfr_div(int nargs)
+{
+	NODE *numerator, *denominator, *result;
+	NODE *num, *denom;
+	NODE *quotient, *remainder;
+	NODE *sub, **lhs;
+
+	result = POP_PARAM();
+	if (result->type != Node_var_array)
+		fatal(_("div: third argument is not an array"));
+	assoc_clear(result);
+
+	denominator = POP_SCALAR();
+	numerator = POP_SCALAR();
+
+	if (do_lint) {
+		if ((numerator->flags & (NUMCUR|NUMBER)) == 0)
+			lintwarn(_("div: received non-numeric first argument"));
+		if ((denominator->flags & (NUMCUR|NUMBER)) == 0)
+			lintwarn(_("div: received non-numeric second argument"));
+	}
+
+	(void) force_number(numerator);
+	(void) force_number(denominator);
+
+	/* convert numerator and denominator to integer */
+	if (is_mpg_integer(numerator)) {
+		num = mpg_integer();
+		mpz_set(num->mpg_i, numerator->mpg_i);
+	} else {
+		if (! mpfr_number_p(numerator->mpg_numbr)) {
+			/* [+-]inf or NaN */
+			return numerator;
+		}
+
+		num = mpg_integer();
+		mpfr_get_z(num->mpg_i, numerator->mpg_numbr, MPFR_RNDZ);
+	}
+
+	if (is_mpg_integer(denominator)) {
+		denom = mpg_integer();
+		mpz_set(denom->mpg_i, denominator->mpg_i);
+	} else {
+		if (! mpfr_number_p(denominator->mpg_numbr)) {
+			/* [+-]inf or NaN */
+			return denominator;
+		}
+
+		denom = mpg_integer();
+		mpfr_get_z(denom->mpg_i, denominator->mpg_numbr, MPFR_RNDZ);
+	}
+
+	if (mpz_sgn(denom->mpg_i) == 0)
+		fatal(_("div: division by zero attempted"));
+
+	quotient = mpg_integer();
+	remainder = mpg_integer();
+
+	/* do the division */
+	mpz_tdiv_qr(quotient->mpg_i, remainder->mpg_i, num->mpg_i, denom->mpg_i);
+	unref(num);
+	unref(denom);
+
+	sub = make_string("quotient", 8);
+	lhs = assoc_lookup(result, sub);
+	unref(*lhs);
+	*lhs = quotient;
+
+	sub = make_string("remainder", 9);
+	lhs = assoc_lookup(result, sub);
+	unref(*lhs);
+	*lhs = remainder;
+
+	return make_number((AWKNUM) 0.0);
+}
+
 /*
  * mpg_tofloat --- convert an arbitrary-precision integer operand to
  *	a float without loss of precision. It is assumed that the
diff --git a/pc/config.h b/pc/config.h
index 85389eb2..c5d78a96 100644
--- a/pc/config.h
+++ b/pc/config.h
@@ -423,7 +423,7 @@
 #define PACKAGE_NAME "GNU Awk"
 
 /* Define to the full name and version of this package. */
-#define PACKAGE_STRING "GNU Awk 4.1.1a"
+#define PACKAGE_STRING "GNU Awk 4.1.60"
 
 /* Define to the one symbol short name of this package. */
 #define PACKAGE_TARNAME "gawk"
@@ -432,7 +432,7 @@
 #define PACKAGE_URL "http://www.gnu.org/software/gawk/"
 
 /* Define to the version of this package. */
-#define PACKAGE_VERSION "4.1.1a"
+#define PACKAGE_VERSION "4.1.60"
 
 /* Define to 1 if *printf supports %F format */
 #undef PRINTF_HAS_F_FORMAT
@@ -494,7 +494,7 @@
 
 
 /* Version number of package */
-#define VERSION "4.1.1a"
+#define VERSION "4.1.60"
 
 /* Enable large inode numbers on Mac OS X 10.5.  */
 #ifndef _DARWIN_USE_64_BIT_INODE
diff --git a/po/it.po b/po/it.po
index 68f2d7f0..a5578723 100644
--- a/po/it.po
+++ b/po/it.po
@@ -1,5 +1,5 @@
 # Italian messages for GNU Awk
-# Copyright (C) 2002-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002-2014 Free Software Foundation, Inc.
 # Antonio Colombo <azc100@gmail.com>.
 #
 msgid ""
@@ -7,7 +7,7 @@ msgstr ""
 "Project-Id-Version: GNU Awk 4.0.73, API: 0.0\n"
 "Report-Msgid-Bugs-To: arnold@skeeve.com\n"
 "POT-Creation-Date: 2014-04-08 19:23+0300\n"
-"PO-Revision-Date: 2014-01-15 10:39+0100\n"
+"PO-Revision-Date: 2014-06-14 17:50+0100\n"
 "Last-Translator: Antonio Colombo <azc100@gmail.com>\n"
 "Language-Team: Italian <it@li.org>\n"
 "Language: it\n"
@@ -211,7 +211,7 @@ msgstr "`getline' invalida all'interno della regola `%s'"
 
 #: awkgram.y:1425
 msgid "non-redirected `getline' undefined inside END action"
-msgstr "`getline' non re-diretta indefinita dentro `azione' END"
+msgstr "`getline' non ri-diretta indefinita dentro `azione' END"
 
 #: awkgram.y:1444
 msgid "old awk does not support multidimensional arrays"
@@ -1141,7 +1141,7 @@ msgstr ""
 #: command.y:855
 msgid "list [-|+|[filename:]lineno|function|range] - list specified line(s)."
 msgstr ""
-"list [-|+|[nome-file:]num_linea|funzione|intervallo] - elenca riga/he "
+"list [-|+|[nome-file:]num_riga|funzione|intervallo] - elenca riga/he "
 "richiesta/e."
 
 #: command.y:857
@@ -1229,7 +1229,7 @@ msgid ""
 "line or line N within current frame."
 msgstr ""
 "until [[nome-file:]N|funzione] - esegui finché il programma arriva una "
-"rigadifferente, o alla riga N nell'elemento di stack corrente."
+"riga differente, o alla riga N nell'elemento di stack corrente."
 
 #: command.y:895
 msgid "unwatch [N] - remove variable(s) from watch list."
@@ -2615,23 +2615,23 @@ msgstr "chiusura di fd %d (`%s') non riuscita (%s)"
 
 #: io.c:716
 msgid "redirection not allowed in sandbox mode"
-msgstr "re-direzione non consentita in modo `sandbox'"
+msgstr "ri-direzione non consentita in modo `sandbox'"
 
 #: io.c:750
 #, c-format
 msgid "expression in `%s' redirection only has numeric value"
-msgstr "espressione nella re-direzione `%s' ha solo un valore numerico"
+msgstr "espressione nella ri-direzione `%s' ha solo un valore numerico"
 
 #: io.c:756
 #, c-format
 msgid "expression for `%s' redirection has null string value"
-msgstr "espressione nella re-direzione `%s' ha per valore la stringa nulla"
+msgstr "espressione nella ri-direzione `%s' ha per valore la stringa nulla"
 
 #: io.c:761
 #, c-format
 msgid "filename `%s' for `%s' redirection may be result of logical expression"
 msgstr ""
-"nome-file `%s' per la re-direzione `%s' può essere il risultato di una "
+"nome-file `%s' per la ri-direzione `%s' può essere il risultato di una "
 "espressione logica"
 
 #: io.c:809
@@ -2658,12 +2658,12 @@ msgstr ""
 #: io.c:986
 #, c-format
 msgid "can't redirect from `%s' (%s)"
-msgstr "non riesco a re-dirigere da `%s' (%s)"
+msgstr "non riesco a ri-dirigere da `%s' (%s)"
 
 #: io.c:989
 #, c-format
 msgid "can't redirect to `%s' (%s)"
-msgstr "non riesco a re-dirigere a `%s' (%s)"
+msgstr "non riesco a ri-dirigere a `%s' (%s)"
 
 #: io.c:1040
 msgid ""
@@ -2692,12 +2692,12 @@ msgstr "close: `%.*s' non è un file aperto, una `pipe' o un co-processo"
 
 #: io.c:1108
 msgid "close of redirection that was never opened"
-msgstr "chiusura di una re-direzione mai aperta"
+msgstr "chiusura di una ri-direzione mai aperta"
 
 #: io.c:1205
 #, c-format
 msgid "close: redirection `%s' not opened with `|&', second argument ignored"
-msgstr "close: re-direzione `%s' non aperta con `|&', ignoro secondo argomento"
+msgstr "close: ri-direzione `%s' non aperta con `|&', ignoro secondo argomento"
 
 #: io.c:1222
 #, c-format
@@ -3313,7 +3313,7 @@ msgstr "%s: argomento #%d con valore negativo %Zd, darà risultati strani"
 #: msg.c:68
 #, c-format
 msgid "cmd. line:"
-msgstr "linea com.:"
+msgstr "riga com.:"
 
 #: node.c:421
 msgid "backslash at end of string"
@@ -3427,7 +3427,7 @@ msgstr ""
 #: profile.c:1513
 #, c-format
 msgid "redir2str: unknown redirection type %d"
-msgstr "redir2str: tipo di re-direzione non noto %d"
+msgstr "redir2str: tipo di ri-direzione non noto %d"
 
 #: re.c:607
 #, c-format
@@ -3503,5 +3503,3 @@ msgstr "Nessuna espressione regolare precedente"
 msgid "can not pop main context"
 msgstr "non posso salire più in alto nello stack"
 
-#~ msgid "range of the form `[%c-%c]' is locale dependent"
-#~ msgstr "intervallo della forma `[%c-%c]' dipende da `locale'"
diff --git a/str_array.c b/str_array.c
index aa82d71b..33c9ddcc 100644
--- a/str_array.c
+++ b/str_array.c
@@ -69,6 +69,25 @@ afunc_t str_array_func[] = {
 	(afunc_t) 0,
 };
 
+static NODE **env_remove(NODE *symbol, NODE *subs);
+static NODE **env_store(NODE *symbol, NODE *subs);
+static NODE **env_clear(NODE *symbol, NODE *subs);
+
+/* special case for ENVIRON */
+afunc_t env_array_func[] = {
+	str_array_init,
+	(afunc_t) 0,
+	null_length,
+	str_lookup,
+	str_exists,
+	env_clear,
+	env_remove,
+	str_list,
+	str_copy,
+	str_dump,
+	env_store,
+};
+
 static inline NODE **str_find(NODE *symbol, NODE *s1, size_t code1, unsigned long hash1);
 static void grow_table(NODE *symbol);
 
@@ -737,3 +756,63 @@ scramble(unsigned long x)
 
 	return x;
 }
+
+/* env_remove --- for ENVIRON, remove value from real environment */
+
+static NODE **
+env_remove(NODE *symbol, NODE *subs)
+{
+	NODE **val = str_remove(symbol, subs);
+
+	if (val != NULL)
+		(void) unsetenv(subs->stptr);
+
+	return val;
+}
+
+/* env_clear --- clear out the environment when ENVIRON is deleted */
+
+static NODE **
+env_clear(NODE *symbol, NODE *subs)
+{
+	extern char **environ;
+	NODE **val = str_clear(symbol, subs);
+
+	environ = NULL;	/* ZAP! */
+
+	/* str_clear zaps the vtable, reset it */
+	symbol->array_funcs = env_array_func;
+
+	return val;
+}
+
+/* env_store --- post assign function for ENVIRON, put new value into env */
+
+static NODE **
+env_store(NODE *symbol, NODE *subs)
+{
+	NODE **val = str_exists(symbol, subs);
+	const char *newval;
+
+	assert(val != NULL);
+
+	newval = (*val)->stptr;
+	if (newval == NULL)
+		newval = "";
+
+	(void) setenv(subs->stptr, newval, 1);
+
+	return val;
+}
+
+/* init_env_array --- set up the pointers for ENVIRON. A bit hacky. */
+
+void
+init_env_array(NODE *env_node)
+{
+	/* If POSIX simply don't reset the vtable and things work as before */
+	if (do_posix)
+		return;
+
+	env_node->array_funcs = env_array_func;
+}
diff --git a/test/ChangeLog b/test/ChangeLog
index 4f72280b..ed673d8c 100644
--- a/test/ChangeLog
+++ b/test/ChangeLog
@@ -13,6 +13,11 @@
 	* printhuge.awk, printhuge.ok: New files.
 	Test from mail.green.fox@gmail.com.
 
+2014-06-24         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* Makefile.am (profile1, profile4, profile5): Adjust for change to
+	--pretty-print option.
+
 2014-06-19         Michael Forney       <forney@google.com>
 
 	* Makefile.am (poundbang): Fix relative path of AWKPROG.
@@ -229,6 +234,12 @@
 	* Makefile.am (badassign1): New test.
 	* badassign1.awk, badassign1.ok: New files.
 
+2013-09-25         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* Makfile.am (randtest): New test.
+	* randtest.sh, randtest.ok: New files.
+	* rand.ok: Updated to reflect new results based on code change.
+
 2013-09-13         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* Makefile.am: Fix quoting for generation of Maketests file so
diff --git a/test/Makefile.am b/test/Makefile.am
index c822163a..d4ef501c 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -707,6 +707,8 @@ EXTRA_DIST = \
 	rand-mpfr.ok \
 	rand.awk \
 	rand.ok \
+	randtest.sh \
+	randtest.ok \
 	range1.awk \
 	range1.in \
 	range1.ok \
@@ -981,7 +983,7 @@ BASIC_TESTS = \
 	paramdup paramres paramtyp paramuninitglobal parse1 parsefld parseme \
 	pcntplus posix2008sub prdupval prec printf0 printf1 prmarscl prmreuse \
 	prt1eval prtoeval \
-	rand range1 rebt8b1 redfilnm regeq regexprange regrange reindops \
+	rand randtest range1 rebt8b1 redfilnm regeq regexprange regrange reindops \
 	reparse resplit rri1 rs rsnul1nl rsnulbig rsnulbig2 rstest1 rstest2 \
 	rstest3 rstest4 rstest5 rswhite \
 	scalar sclforin sclifin sortempty splitargv splitarr splitdef \
@@ -1659,10 +1661,11 @@ dumpvars::
 
 profile1:
 	@echo $@
-	@$(AWK) --pretty-print=ap-$@.out -f "$(srcdir)"/xref.awk "$(srcdir)"/dtdgport.awk > _$@.out1
+	@$(AWK) -f "$(srcdir)"/xref.awk "$(srcdir)"/dtdgport.awk > _$@.out1
+	@$(AWK) --pretty-print=ap-$@.out -f "$(srcdir)"/xref.awk
 	@$(AWK) -f ap-$@.out "$(srcdir)"/dtdgport.awk > _$@.out2 ; rm ap-$@.out
 	@$(CMP) _$@.out1 _$@.out2 && rm _$@.out[12] || { echo EXIT CODE: $$? >>_$@ ; \
-	cp "$(srcdir)"/dtdgport.awk > $@.ok ; }
+	cp "$(srcdir)"/dtdgport.awk $@.ok ; }
 	
 
 profile2:
@@ -1679,13 +1682,13 @@ profile3:
 
 profile4:
 	@echo $@
-	@GAWK_NO_PP_RUN=1 $(AWK) --profile=ap-$@.out -f "$(srcdir)"/$@.awk > /dev/null
+	@$(AWK) --pretty-print=ap-$@.out -f "$(srcdir)"/$@.awk > /dev/null
 	@sed 1,2d < ap-$@.out > _$@; rm ap-$@.out
 	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
 
 profile5:
 	@echo $@
-	@GAWK_NO_PP_RUN=1 $(AWK) --profile=ap-$@.out -f "$(srcdir)"/$@.awk > /dev/null
+	@$(AWK) --pretty-print=ap-$@.out -f "$(srcdir)"/$@.awk > /dev/null
 	@sed 1,2d < ap-$@.out > _$@; rm ap-$@.out
 	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
 
@@ -1918,6 +1921,12 @@ dfamb1:
 	AWKPATH="$(srcdir)" $(AWK) -f $@.awk "$(srcdir)"/$@.in >_$@ 2>&1 || echo EXIT CODE: $$? >>_$@
 	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
 
+
+randtest::
+	@echo $@
+	@GAWK="$(AWKPROG)" "$(srcdir)"/randtest.sh >_$@
+	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
+
 backbigs1:
 	@echo $@
 	@[ -z "$$GAWKLOCALE" ] && GAWKLOCALE=en_US.UTF-8; \
diff --git a/test/Makefile.in b/test/Makefile.in
index 1660ab8f..449ff46b 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -953,6 +953,8 @@ EXTRA_DIST = \
 	rand-mpfr.ok \
 	rand.awk \
 	rand.ok \
+	randtest.sh \
+	randtest.ok \
 	range1.awk \
 	range1.in \
 	range1.ok \
@@ -1226,7 +1228,7 @@ BASIC_TESTS = \
 	paramdup paramres paramtyp paramuninitglobal parse1 parsefld parseme \
 	pcntplus posix2008sub prdupval prec printf0 printf1 prmarscl prmreuse \
 	prt1eval prtoeval \
-	rand range1 rebt8b1 redfilnm regeq regexprange regrange reindops \
+	rand randtest range1 rebt8b1 redfilnm regeq regexprange regrange reindops \
 	reparse resplit rri1 rs rsnul1nl rsnulbig rsnulbig2 rstest1 rstest2 \
 	rstest3 rstest4 rstest5 rswhite \
 	scalar sclforin sclifin sortempty splitargv splitarr splitdef \
@@ -2084,10 +2086,11 @@ dumpvars::
 
 profile1:
 	@echo $@
-	@$(AWK) --pretty-print=ap-$@.out -f "$(srcdir)"/xref.awk "$(srcdir)"/dtdgport.awk > _$@.out1
+	@$(AWK) -f "$(srcdir)"/xref.awk "$(srcdir)"/dtdgport.awk > _$@.out1
+	@$(AWK) --pretty-print=ap-$@.out -f "$(srcdir)"/xref.awk
 	@$(AWK) -f ap-$@.out "$(srcdir)"/dtdgport.awk > _$@.out2 ; rm ap-$@.out
 	@$(CMP) _$@.out1 _$@.out2 && rm _$@.out[12] || { echo EXIT CODE: $$? >>_$@ ; \
-	cp "$(srcdir)"/dtdgport.awk > $@.ok ; }
+	cp "$(srcdir)"/dtdgport.awk $@.ok ; }
 
 profile2:
 	@echo $@
@@ -2103,13 +2106,13 @@ profile3:
 
 profile4:
 	@echo $@
-	@GAWK_NO_PP_RUN=1 $(AWK) --profile=ap-$@.out -f "$(srcdir)"/$@.awk > /dev/null
+	@$(AWK) --pretty-print=ap-$@.out -f "$(srcdir)"/$@.awk > /dev/null
 	@sed 1,2d < ap-$@.out > _$@; rm ap-$@.out
 	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
 
 profile5:
 	@echo $@
-	@GAWK_NO_PP_RUN=1 $(AWK) --profile=ap-$@.out -f "$(srcdir)"/$@.awk > /dev/null
+	@$(AWK) --pretty-print=ap-$@.out -f "$(srcdir)"/$@.awk > /dev/null
 	@sed 1,2d < ap-$@.out > _$@; rm ap-$@.out
 	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
 
@@ -2342,6 +2345,11 @@ dfamb1:
 	AWKPATH="$(srcdir)" $(AWK) -f $@.awk "$(srcdir)"/$@.in >_$@ 2>&1 || echo EXIT CODE: $$? >>_$@
 	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
 
+randtest::
+	@echo $@
+	@GAWK="$(AWKPROG)" "$(srcdir)"/randtest.sh >_$@
+	@-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@
+
 backbigs1:
 	@echo $@
 	@[ -z "$$GAWKLOCALE" ] && GAWKLOCALE=en_US.UTF-8; \
diff --git a/test/rand.ok b/test/rand.ok
index 60432b95..1df4ba39 100644
--- a/test/rand.ok
+++ b/test/rand.ok
@@ -1 +1 @@
- 62  67  88   6  35  77   3  68  30  96  90  26  35   8  88  93  49  53  37 
+ 67   6  77  68  96  26   8  93  53  74  53  95  78  74  96  77  33  58  91 
diff --git a/test/randtest.ok b/test/randtest.ok
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/test/randtest.ok
diff --git a/test/randtest.sh b/test/randtest.sh
new file mode 100755
index 00000000..b17fda73
--- /dev/null
+++ b/test/randtest.sh
@@ -0,0 +1,113 @@
+# THIS PURPOSELY DOES NOT HAVE A !# LINE !!!!
+#
+# Date: Mon, 9 Sep 2013 14:49:43 -0700
+# From: Bob Jewett <jewett@bill.scs.agilent.com>
+# Message-Id: <201309092149.r89Lnh94010909@bill.scs.agilent.com>
+# To: arnold@skeeve.com
+# Subject: Re: [bug-gawk] Bug in random() in builtin.c
+# 
+# Hi Arnold,
+# 
+# Attached below is a script that tests gawk for this particular
+# rand() problem.  The pair-wise combinations show a strong
+# autocorrelation for a delay of 31 pairs of rand() samples. 
+# 
+# The script prints out the measured autocorrelation for a record
+# of NSAMPLES pairs.  It also prints a fail message at the end if
+# it fails. 
+# 
+# If you want to see the autocorrelation values, there is a print
+# statement that if uncommented will save them to a file.
+# 
+# Please let me know if the mailer screws up the transfer or
+# if you have any questions about the test.
+# 
+# Best regards,
+# Bob
+# 
+# -------------- test_pair_power_autocorrelation -----------------------
+# 
+#!/bin/ksh
+
+#GAWK=/bin/gawk
+
+# ADR: Get GAWK from the environment.
+# Additional note: This wants ksh/bash for the use of $RANDOM below to
+# seed the generator. However, shells that don't provide it won't be
+# a problem since gawk will then seed the generator with the time of day,
+# as srand() will be called without an argument.
+
+# large NSAMPLES and NRUNS will bring any correlation out of the noise better
+NSAMPLES=1024; MAX_ALLOWED_SIGMA=5; NRUNS=50;
+
+$GAWK 'BEGIN{ 
+    srand('$RANDOM');
+    nsamples=('$NSAMPLES');
+    max_allowed_sigma=('$MAX_ALLOWED_SIGMA');
+    nruns=('$NRUNS');
+    for(tau=0;tau<nsamples/2;tau++) corr[tau]=0;
+
+    for(run=0;run<nruns;run++) {
+	sum=0;
+
+	# Fill an array with a sequence of samples that are a
+	# function of pairs of rand() values.
+
+	for(i=0;i<nsamples;i++) {
+	   samp[i]=((rand()-0.5)*(rand()-0.5))^2;
+	   sum=sum+samp[i];
+	   }
+
+	# Subtract off the mean of the sequence:
+
+	mean=sum/nsamples;
+	for(i=0;i<nsamples;i++) samp[i]=samp[i]-mean;
+
+	# Calculate an autocorrelation function on the sequence.
+	# Because the values of rand() should be independent, there
+	# should be no peaks in the autocorrelation.
+
+	for(tau=0;tau<nsamples/2;tau++) {
+	    sum=0;
+	    for(i=0;i<nsamples/2;i++) sum=sum+samp[i]*samp[i+tau];
+	    corr[tau]=corr[tau]+sum;
+	    }
+
+	}
+    # Normalize the autocorrelation to the tau=0 value.
+
+    max_corr=corr[0];
+    for(tau=0;tau<nsamples/2;tau++) corr[tau]=corr[tau]/max_corr;
+
+    # OPTIONALLY Print out the autocorrelation values:
+
+    # for(tau=0;tau<nsamples/2;tau++) print tau, corr[tau] > "pairpower_corr.data";
+
+    # Calculate the sigma for the non-zero tau values: 
+
+    power_sum=0;
+
+    for(tau=1;tau<nsamples/2;tau++) power_sum=power_sum+(corr[tau])^2;
+
+    sigma=sqrt(power_sum/(nsamples/2-1));
+
+    # See if any of the correlations exceed a reasonable number of sigma:
+
+    passed=1;
+    for(tau=1;tau<nsamples/2;tau++) {
+	if ( abs(corr[tau])/sigma > max_allowed_sigma ) {
+	    print "Tau=", tau ", Autocorr=", corr[tau]/sigma, "sigma";
+	    passed=0;
+	    }
+        }
+    if(!passed) {
+	print "Test failed."
+	exit(1);
+        }
+    else exit (0);
+    }
+
+function abs(abs_input) { return(sqrt(abs_input^2)) ; }
+'
+
+exit 0