#!/bin/sh
# makewhatis: create the whatis database
# Created: Sun Jun 14 10:49:37 1992
# Revised: Sat Jan  8 14:12:37 1994 by faith@cs.unc.edu
# Revised: Sat Mar 23 17:56:18 1996 by micheal@actrix.gen.nz
# Copyright 1992, 1993, 1994 Rickard E. Faith (faith@cs.unc.edu)
# May be freely distributed and modified as long as copyright is retained.
#
# Wed Dec 23 13:27:50 1992: Rik Faith (faith@cs.unc.edu) applied changes
# based on Mitchum DSouza (mitchum.dsouza@mrc-apu.cam.ac.uk) cat patches.
# Also, cleaned up code and make it work with NET-2 doc pages.
#
# makewhatis-1.4: aeb 940802, 941007, 950417
# Fixed so that the -c option works correctly for the cat pages
# on my machine. Fix for -u by Nan Zou (nan@ksu.ksu.edu).
# Many minor changes.
# The -s option is undocumented, and may well disappear again.
#
# Sat Mar 23 1996: Michael Hamilton (michael@actrix.gen.nz).
# I changed the script to invoke gawk only once for each directory tree.
# This speeds things up considerably (from 30 minutes down to 1.5 minutes
# on my 486DX66).
# 960401 - aeb: slight adaptation to work correctly with cat pages.
# 960510 - added fixes by brennan@raven.ca.boeing.com, author of mawk.
# 971012 - replaced "test -z" - it doesnt work on SunOS 4.1.3_U1.
# 980710 - be more careful with TMPFILE.
# 000323 - do not change PATH, better treatment of catpages - Bryan Henderson.
# 011117 - avoid suspicious filenames.
# 030310 - find files only; fix LAPACK cruft; no /usr/man default;
#	use /dev/stderr instead of /dev/tty; handle files with strange names;
#	add support for chinese, hungarian, indonesian, japanese, korean,
#	polish, russian (Thierry Vignaud).
#
# makewhatis 1.6: Federico Lucifredi
# 060608 - Corrected traps.
# 060719 - section choosing behavior to match man's (Mike frysinger).
#
# Note for Slackware users: "makewhatis -v -w -c" will work.
#
# makewhatis flc 060719 (from @version@)

program=`basename $0`

# In case both /usr/man and /usr/share/man exist, the former is local
# and should be first.
# It is a bug to add /var/cache/man to DEFCATPATH.
dm=
for d in /usr/man /usr/share/man /usr/X11R6/man /usr/local/man
do
    if [ -d $d ]; then
	if [ x$dm = x ]; then dm=$d; else dm=$dm:$d; fi
    fi
done
DEFMANPATH=$dm
dc=
for d in /usr/man/preformat /usr/man /usr/share/man/preformat /usr/share/man
do
    if [ -d $d ]; then
	if [ x$dc = x ]; then dc=$d; else dc=$dc:$d; fi
    fi
done
DEFCATPATH=$dc

# In case /usr is read-only, make /usr/foo/whatis (etc) a symlink to
# something like /var/cache/man/foo-whatis.
# Some distributions make a single big /var/cache/man/whatis file,
# but that leads to problems and bugs.

# AWK=/usr/bin/gawk
AWK=@awk@

# Find a place for our temporary files. If security is not a concern, use
#	TMPFILE=/tmp/whatis$$; TMPFILEDIR=none
# Of course makewhatis should only have the required permissions
# (for reading and writing directories like /usr/man).
# We try here to be careful (and avoid preconstructed symlinks)
# in case makewhatis is run as root, by creating a subdirectory of /tmp.

TMPFILEDIR=/tmp/whatis.tmp.dir.$$
rm -rf $TMPFILEDIR
if ! mkdir -m 0700 $TMPFILEDIR; then
    echo Could not create $TMPFILEDIR
    exit 1;
fi
TMPFILE=$TMPFILEDIR/w

# make sure TMPFILEDIR is deleted if program is killed or terminates
# (just delete this line if your shell doesnt know about trap)
trap "rm -rf $TMPFILEDIR" 0
trap "rm -rf $TMPFILEDIR; exit 255" 1 2 3 15

# default find arg: no directories, no empty files
findarg0="-type f -size +0"

topath=manpath

defmanpath=$DEFMANPATH
defcatpath=

if [ -n "$MANSECT" ]; then
	sections=$MANSECT
else
	sections=`$AWK '($1 == "MANSECT") { print $2 }' @man_config_file@`
	if [ x"$sections" = x ]; then
		sections="@sections@"
	fi
fi
sections=`echo $sections | sed -e 's/:/ /g'`

for name in "$@"
do
if [ -n "$setsections" ]; then
	setsections=
	sections=$name
	continue
fi
case $name in
    --version|-V)
	echo "$program from @version@"
	exit 0;;
    -c) topath=catpath
	defmanpath=
	defcatpath=$DEFCATPATH
	continue;;
    -s) setsections=1
	continue;;
    -u) findarg="-ctime 0"
	update=1
	continue;;
    -v) verbose=1
	continue;;
    -w) manpath=`man --path`
	catpath=$manpath
	continue;;
    -*) echo "Usage: makewhatis [-s sections] [-u] [-v] [-w] [manpath] [-c [catpath]]"
	echo "       This will build the whatis database for the man pages"
	echo "       found in manpath and the cat pages found in catpath."
        echo "       -s: sections (default: $sections)"
	echo "       -u: update database with new pages"
	echo "       -v: verbose"
	echo "       -w: use manpath obtained from \`man --path\`"
	echo "       [manpath]: man directories (default: $DEFMANPATH)"
	echo "       [catpath]: cat directories (default: the first existing"
	echo "           directory in $DEFCATPATH)"
	exit;;
     *) if [ -d $name ]
	then
	    eval $topath="\$$topath":$name
	else
	    echo "No such directory $name"
	    exit
	fi;;
esac
done

manpath=`echo ${manpath-$defmanpath} | tr : ' '`
if [ x"$catpath" = x ]; then
   for d in `echo $defcatpath | tr : ' '`
   do
      if [ -d $d ]; then catpath=$d; break; fi
   done
fi
catpath=`echo ${catpath} | tr : ' '`

# first truncate all the whatis files that will be created new,
# then only update - we might visit the same directory twice
if [ x$update = x ]; then
   for pages in man cat
   do
      eval path="\$$pages"path
      for mandir in $path
      do
	 cp /dev/null $mandir/whatis
      done
   done
fi

for pages in man cat
do
   export pages
   eval path="\$$pages"path
   for mandir in $path
   do
     if [ x$verbose != x ]; then
	echo "about to enter $mandir" > /dev/stderr
     fi

     # kludge for Slackware's /usr/man/preformat
     if [ $mandir = /usr/man/preformat ]
     then
	mandir1=/usr/man
     else
	mandir1=$mandir
     fi

     # if $mandir is on a readonly partition, and the whatis file
     # is not a symlink, then let's skip trying to update it
     if [ ! -L ${mandir1}/whatis ]
     then
	if [ -e ${mandir1}/whatis ] && [ ! -w ${mandir1}/whatis ]
	then
	   if [ x$verbose != x ]; then
	      echo skipping $mandir - whatis file is readonly > /dev/stderr
	   fi
	   continue
	elif [ ! -e ${mandir1}/whatis ] && [ ! -w ${mandir1} ]
	then
	   if [ x$verbose != x ]; then
	      echo skipping $mandir - directory is readonly > /dev/stderr
	   fi
	   continue
	fi
     fi

     if [ -s ${mandir}/whatis -a $pages = man -a x$update = x ]; then
	if [ x$verbose != x ]; then
	   echo skipping $mandir - we did it already > /dev/stderr
	fi
     else      
       here=`pwd`
       cd $mandir
       for i in $sections
       do
	 if [ -d ${pages}$i ]
	 then
	    cd ${pages}$i
	    section=$i
	    curdir=$mandir/${pages}$i
	    export section verbose curdir
	    find $mandir/${pages}$i/. -name '*' $findarg0 $findarg -print | $AWK '

	    function readline() {
              if (use_zcat || use_bzcat || use_lzcat) {
		result = (pipe_cmd | getline);
		if (result < 0) {
		  print "Pipe error: " pipe_cmd " " ERRNO > "/dev/stderr";
		}
	      } else {
		result = (getline < filename);
		if (result < 0) {
		  print "Read file error: " filename " " ERRNO > "/dev/stderr";
		}
	      }
	      return result;
	    }
	    
	    function closeline() {
              if (use_zcat || use_bzcat || use_lzcat) {
		return close(pipe_cmd);
	      } else {
		return close(filename);
	      }
	    }
	    
	    function do_one() {
	      insh = 0; thisjoin = 1; done = 0;
	      entire_line = "";

	      if (verbose) {
		print "adding " filename > "/dev/stderr"
	      }
	      
	      use_zcat = match(filename,"\\.Z$") ||
			 match(filename,"\\.z$") || match(filename,"\\.gz$");
	      if (!use_zcat)
		use_bzcat = match(filename,"\\.bz2");
              if(!use_bzcat)
                use_lzcat = match(filename,"\\.lzma");
              if (use_zcat || use_bzcat || use_lzcat ) {
		filename_no_gz = substr(filename, 0, RSTART - 1);
	      } else {
		filename_no_gz = filename;
	      }
	      match(filename_no_gz, "/[^/]+$");
	      progname = substr(filename, RSTART + 1, RLENGTH - 1);
	      if (match(progname, "\\." section "[A-Za-z]+")) {
		actual_section = substr(progname, RSTART + 1, RLENGTH - 1);
	      } else {
		actual_section = section;
	      }
	      sub(/\..*/, "", progname);
              if (use_zcat || use_bzcat || use_lzcat) {
		if (use_zcat) {
		  pipe_cmd = "zcat \"" filename "\"";
                } else if (use_bzcat) {
		  pipe_cmd = "bzcat \"" filename "\"";
                } else {
                  pipe_cmd = "lzcat \"" filename "\"";
                }
		# try to avoid suspicious stuff
		if (filename ~ /[;&|`$(]/) {
		  print "ignored strange file name " filename " in " curdir > "/dev/stderr";
		  return;
		}
	      }
	    
	      while (!done && readline() > 0) {
		gsub(/.\b/, "");
		if (($1 ~ /^\.[Ss][Hh]/ &&
		  ($2 ~ /[Nn][Aa][Mm][Ee]/ ||
		   $2 ~ /^JMÉNO/ || $2 ~ /^NAVN/ || $2 ~ /^NUME/ ||
		   $2 ~ /^BEZEICHNUNG/ || $2 ~ /^NOMBRE/ ||
		   $2 ~ /^NIMI/ || $2 ~ /^NOM/ || $2 ~ /^IME/ ||
		   $2 ~ /^N[ÉE]V/ || $2 ~ /^NAMA/ || $2 ~ /^̾Á°/ ||
		   $2 ~ /^̾¾Î/ || $2 ~ /^À̸§/ || $2 ~ /^NAZWA/ ||
		   $2 ~ /^îáú÷áîéå/ || $2 ~ /^Ãû³Æ/ || $2 ~ /^¦WºÙ/ ||
		   $2 ~ /^NOME/ || $2 ~ /^NAAM/ || $2 ~ /^ÈÌÅ/)) ||
		  (pages == "cat" && $1 ~ /^NAME/)) {
		    if (!insh) {
		      insh = 1;
		    } else {
		      done = 1;
		    }
		} else if (insh) {
		  if ($1 ~ /^\.[Ss][HhYS]/ ||
		    (pages == "cat" &&
		    ($1 ~ /^S[yYeE]/ || $1 ~ /^DESCRIPTION/ ||
		     $1 ~ /^COMMAND/ || $1 ~ /^OVERVIEW/ ||
		     $1 ~ /^STRUCTURES/ || $1 ~ /^INTRODUCTION/ ||
		     $0 ~ /^[^ ]/))) {
		      # end insh for Synopsis, Syntax, but also for
		      # DESCRIPTION (e.g., XFree86.1x),
		      # COMMAND (e.g., xspread.1)
		      # OVERVIEW (e.g., TclCommandWriting.3)
		      # STRUCTURES (e.g., XEvent.3x)
		      # INTRODUCTION (e.g., TclX.n)
		      # and anything at all that begins in Column 1, so 
		      # is probably a section header.
		    done = 1;
		  } else {
		    if ($0 ~ progname"-") {  # Fix old cat pages
			sub(progname"-", progname" - ");
		    }
		    if ($0 ~ /[^ \\]-$/) {
		      sub(/-$/, "");	  # Handle Hyphenations
		      nextjoin = 1;
		    } else if ($0 ~ /\\c$/) {
		      sub(/\\c$/, "");	  # Handle Continuations
		      nextjoin = 1;
		    } else
		      nextjoin = 0;

		    sub(/^.[IB] /, "");       # Kill bold and italics
		    sub(/^.BI /, "");         #
		    sub(/^.SM /, "");         # Kill small
		    sub(/^.Nm /, "");         # Kill bold
		    sub(/^.Tn /, "");         # Kill normal
	            sub(/^.Li /, "");         # Kill .Li
	            sub(/^.Dq /, "");         # Kill .Dq
	            sub(/^.Nd */, "- ");      # Convert .Nd to dash
		    sub(/\\\".*/, "");        # Trim pending comments
		    sub(/  *$/, "");          # Trim pending spaces
		    sub(/^\.$/, "");          # Kill blank comments
		    sub(/^'"'"'.*/, "");      # Kill comment/troff lines
		    sub(/^.in .*/, "");       # Kill various macros
		    sub(/^.ti .*/, "");
		    sub(/^.ta .*/, "");
		    sub(/^.Vb .*/, "");
		    sub(/^.[PLTH]P$/, "");    # .PP/.LP/.TP/.HP
		    sub(/^.Pp$/, "");
		    sub(/^.[iI]X .*$/, "");
		    sub(/^.nolinks$/, "");
		    sub(/^.B$/, "");
		    sub(/^.nf$/, "");

		    if (($1 ~ /^\.../ || $1 == "") &&
		        (entire_line ~ / - / || entire_line ~ / \\- /)) {
		      # Assume that this ends the description of one line
		      # Sometimes there are several descriptions in one page,
		      # as in outb(2).
		      handle_entire_line();
		      entire_line = "";
		      thisjoin = 1;
		    } else {
		      if (thisjoin) {
			entire_line = entire_line $0;
		      } else {
			entire_line = entire_line " " $0;
		      }
		      thisjoin = nextjoin;
		    }
		  }
		}
	      }
	      handle_entire_line();
	      closeline();
	    }

	    function handle_entire_line() {
	      x = entire_line;             # Keep it short

	      gsub(/\015/, "", x);         # Kill DOS remains
	      gsub(/	/, " ", x);        # Translate tabs to spaces
	      gsub(/  +/, " ", x);         # Collapse spaces
	      gsub(/ *, */, ", ", x);      # Fix comma spacings
	      sub(/^ /, "", x);            # Kill initial spaces
	      sub(/ $/, "", x);            # Kill trailing spaces
	      sub(/__+/, "_", x);          # Collapse underscores

	      gsub(/\\f\(../, "", x);         # Kill font changes
	      gsub(/\\f[PRIB0123]/, "", x);   # Kill font changes
	      gsub(/\\s[-+0-9]*/, "", x);     # Kill size changes
	      gsub(/\\&/, "", x);             # Kill \&
	      gsub(/\\\|/, "", x);            # Kill \|
	      gsub(/\\\((ru|ul)/, "_", x);    # Translate
	      gsub(/\\\((mi|hy|em)/, "-", x); # Translate
	      gsub(/\\\*\(../, "", x);        # Kill troff strings
	      gsub(/\\/, "", x);              # Kill all backslashes
	      gsub(/"/, "", x);               # Kill quotes (from .Nd "foo bar")
	      sub(/<h1 align=center>/, "", x);# Yuk! HTML cruft
	      gsub(/\000.*/, "X", x);         # Binary cruft in LAPACK pages
	      gsub(/  +/, " ", x);            # Collapse spaces (again)
	      sub(/^ /, "", x);               # Kill initial spaces (again)
	      sub(/ $/, "", x);               # Kill trailing spaces (again)
	      sub(/\.$/, "", x);              # Kill trailing period

	      if (!match(x, / - /))
		return;

	      after_dash = substr(x, RSTART);
	      head = substr(x, 1, RSTART-1) ", ";
	      while (match(head, /, /)) {
		prog = substr(head, 1, RSTART-1);
		head = substr(head, RSTART+2);
		if (prog != progname)
		  prog = prog " [" progname "]";
		printf "%-*s (%s) %s\n", 20, prog, actual_section, after_dash;
	      }
	    }

	    {			# Main action - process each filename read in.
	      filename = $0;
	      do_one();
	    }
	    ' pages=$pages section=$section verbose=$verbose curdir=$curdir
	    cd ..
	 fi
       done > $TMPFILE

       cd "$here"

       if [ -f ${mandir1}/whatis ]
       then
	 cat ${mandir1}/whatis >> $TMPFILE
       fi
       tr -s '\n' < $TMPFILE | sort -u > ${mandir1}/whatis

       chmod 644 ${mandir1}/whatis
       rm $TMPFILE
     fi
   done
done

# remove tempdir
rm -rf $TMPFILEDIR