diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/ChangeLog | 7 | ||||
| -rw-r--r-- | doc/gawk.1 | 8 | ||||
| -rw-r--r-- | doc/gawk.info | 735 | ||||
| -rw-r--r-- | doc/gawk.texi | 26 | ||||
| -rw-r--r-- | doc/gawktexi.in | 26 |
5 files changed, 421 insertions, 381 deletions
diff --git a/doc/ChangeLog b/doc/ChangeLog index 7618db88..7841dc5e 100644 --- a/doc/ChangeLog +++ b/doc/ChangeLog @@ -35,7 +35,7 @@ 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> @@ -109,6 +109,11 @@ * 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. @@ -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 diff --git a/doc/gawk.info b/doc/gawk.info index defd9fed..440e9999 100644 --- a/doc/gawk.info +++ b/doc/gawk.info @@ -9713,9 +9713,18 @@ with a pound sign (`#'). 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. + 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 @@ -30722,9 +30731,9 @@ 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 93) +* dark corner, FILENAME variable <1>: Auto-set. (line 102) * dark corner, FILENAME variable: Getline Notes. (line 19) -* dark corner, FNR/NR variables: Auto-set. (line 314) +* dark corner, FNR/NR variables: Auto-set. (line 323) * dark corner, format-control characters: Control Letters. (line 18) * dark corner, FS as null string: Single Character Fields. (line 20) @@ -30893,12 +30902,12 @@ Index (line 23) * differences in awk and gawk, close() function: Close Files And Pipes. (line 81) -* differences in awk and gawk, ERRNO variable: Auto-set. (line 73) +* 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 35) * differences in awk and gawk, FPAT variable: User-modified. (line 45) -* differences in awk and gawk, FUNCTAB variable: Auto-set. (line 119) +* differences in awk and gawk, FUNCTAB variable: Auto-set. (line 128) * differences in awk and gawk, function arguments (gawk): Calling Built-in. (line 16) * differences in awk and gawk, getline command: Getline. (line 19) @@ -30921,14 +30930,14 @@ Index (line 256) * differences in awk and gawk, print/printf statements: Format Modifiers. (line 13) -* differences in awk and gawk, PROCINFO array: Auto-set. (line 133) +* differences in awk and gawk, PROCINFO array: Auto-set. (line 142) * differences in awk and gawk, record separators: Records. (line 117) * differences in awk and gawk, regexp constants: Using Constant Regexps. (line 43) * differences in awk and gawk, regular expressions: Case-sensitivity. (line 26) * differences in awk and gawk, RS/RT variables: Records. (line 172) -* differences in awk and gawk, RT variable: Auto-set. (line 266) +* differences in awk and gawk, RT variable: Auto-set. (line 275) * differences in awk and gawk, single-character fields: Single Character Fields. (line 6) * differences in awk and gawk, split() function: String Functions. @@ -30937,7 +30946,7 @@ Index * differences in awk and gawk, strings, storing: Records. (line 191) * differences in awk and gawk, strtonum() function (gawk): String Functions. (line 401) -* differences in awk and gawk, SYMTAB variable: Auto-set. (line 274) +* differences in awk and gawk, SYMTAB variable: Auto-set. (line 283) * differences in awk and gawk, TEXTDOMAIN variable: User-modified. (line 162) * differences in awk and gawk, trunc-mod operation: Arithmetic Ops. @@ -31018,13 +31027,13 @@ Index (line 11) * EREs (Extended Regular Expressions): Bracket Expressions. (line 24) * ERRNO variable <1>: TCP/IP Networking. (line 54) -* ERRNO variable <2>: Auto-set. (line 73) +* ERRNO variable <2>: Auto-set. (line 82) * ERRNO variable <3>: BEGINFILE/ENDFILE. (line 26) * ERRNO variable <4>: Close Files And Pipes. (line 138) * ERRNO variable: Getline. (line 19) * error handling: Special FD. (line 16) -* error handling, ERRNO variable and: Auto-set. (line 73) +* 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) @@ -31137,7 +31146,7 @@ Index * file names, distinguishing: Auto-set. (line 52) * 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 93) +* FILENAME variable <1>: Auto-set. (line 102) * FILENAME variable: Reading Files. (line 6) * FILENAME variable, getline, setting with: Getline Notes. (line 19) * filenames, assignments as: Ignoring Assigns. (line 6) @@ -31205,9 +31214,9 @@ Index * floating-point, VAX/VMS: VMS Running. (line 51) * fnmatch extension function: Extension Sample Fnmatch. (line 6) -* FNR variable <1>: Auto-set. (line 103) +* FNR variable <1>: Auto-set. (line 112) * FNR variable: Records. (line 6) -* FNR variable, changing: Auto-set. (line 314) +* FNR variable, changing: Auto-set. (line 323) * for statement: For Statement. (line 6) * for statement, looping over arrays: Scanning an Array. (line 20) * fork extension function: Extension Sample Fork. @@ -31254,7 +31263,7 @@ Index * FSF (Free Software Foundation): Manual History. (line 6) * fts extension function: Extension Sample File Functions. (line 77) -* FUNCTAB array: Auto-set. (line 119) +* FUNCTAB array: Auto-set. (line 128) * function calls: Function Calls. (line 6) * function calls, indirect: Indirect Calls. (line 6) * function pointers: Indirect Calls. (line 6) @@ -31323,7 +31332,7 @@ 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 73) +* 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 138) @@ -31340,7 +31349,7 @@ Index * gawk, FPAT variable in <1>: User-modified. (line 45) * gawk, FPAT variable in: Splitting By Content. (line 26) -* gawk, FUNCTAB array in: Auto-set. (line 119) +* gawk, FUNCTAB array in: Auto-set. (line 128) * 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. @@ -31371,7 +31380,7 @@ Index * gawk, OS/2 version of: PC Using. (line 11) * gawk, PROCINFO array in <1>: Two-way I/O. (line 116) * gawk, PROCINFO array in <2>: Time Functions. (line 47) -* gawk, PROCINFO array in: Auto-set. (line 133) +* gawk, PROCINFO array in: Auto-set. (line 142) * gawk, regexp constants and: Using Constant Regexps. (line 28) * gawk, regular expressions, case sensitivity: Case-sensitivity. @@ -31379,7 +31388,7 @@ Index * gawk, regular expressions, operators: GNU Regexp Operators. (line 6) * gawk, regular expressions, precedence: Regexp Operators. (line 161) -* gawk, RT variable in <1>: Auto-set. (line 266) +* gawk, RT variable in <1>: Auto-set. (line 275) * gawk, RT variable in <2>: Getline/Variable/File. (line 10) * gawk, RT variable in <3>: Multiple Line. (line 129) @@ -31388,7 +31397,7 @@ Index * gawk, source code, obtaining: Getting. (line 6) * gawk, splitting fields and: Constant Size. (line 87) * gawk, string-translation functions: I18N Functions. (line 6) -* gawk, SYMTAB array in: Auto-set. (line 274) +* gawk, SYMTAB array in: Auto-set. (line 283) * gawk, TEXTDOMAIN variable in: User-modified. (line 162) * gawk, timestamps: Time Functions. (line 6) * gawk, uses for: Preface. (line 36) @@ -31793,16 +31802,16 @@ Index (line 47) * nexti debugger command: Debugger Execution Control. (line 49) -* NF variable <1>: Auto-set. (line 108) +* NF variable <1>: Auto-set. (line 117) * NF variable: Fields. (line 33) * NF variable, decrementing: Changing Fields. (line 107) * ni debugger command (alias for nexti): Debugger Execution Control. (line 49) * noassign.awk program: Ignoring Assigns. (line 15) * not Boolean-logic operator: Boolean Ops. (line 6) -* NR variable <1>: Auto-set. (line 128) +* NR variable <1>: Auto-set. (line 137) * NR variable: Records. (line 6) -* NR variable, changing: Auto-set. (line 314) +* NR variable, changing: Auto-set. (line 323) * null strings <1>: Basic Data Typing. (line 26) * null strings <2>: Truth Values. (line 6) * null strings <3>: Regexp Field Splitting. @@ -32082,7 +32091,7 @@ Index * PROCINFO array <3>: Group Functions. (line 6) * PROCINFO array <4>: Passwd Functions. (line 6) * PROCINFO array <5>: Time Functions. (line 47) -* PROCINFO array <6>: Auto-set. (line 133) +* PROCINFO array <6>: Auto-set. (line 142) * PROCINFO array: Obsolete. (line 11) * profiling awk programs: Profiling. (line 6) * profiling awk programs, dynamically: Profiling. (line 172) @@ -32236,7 +32245,7 @@ Index * right angle bracket (>), >> operator (I/O): Redirection. (line 50) * right shift, bitwise: Bitwise Functions. (line 32) * Ritchie, Dennis: Basic Data Typing. (line 55) -* RLENGTH variable: Auto-set. (line 253) +* RLENGTH variable: Auto-set. (line 262) * RLENGTH variable, match() function and: String Functions. (line 220) * Robbins, Arnold <1>: Future Extensions. (line 6) * Robbins, Arnold <2>: Bugs. (line 32) @@ -32263,9 +32272,9 @@ Index * RS variable: Records. (line 20) * RS variable, multiline records and: Multiple Line. (line 17) * rshift() function (gawk): Bitwise Functions. (line 52) -* RSTART variable: Auto-set. (line 259) +* RSTART variable: Auto-set. (line 268) * RSTART variable, match() function and: String Functions. (line 220) -* RT variable <1>: Auto-set. (line 266) +* RT variable <1>: Auto-set. (line 275) * RT variable <2>: Getline/Variable/File. (line 10) * RT variable <3>: Multiple Line. (line 129) @@ -32348,7 +32357,7 @@ Index (line 110) * sidebar, Changing FS Does Not Affect the Fields: Field Splitting Summary. (line 38) -* sidebar, Changing NR and FNR: Auto-set. (line 312) +* sidebar, Changing NR and FNR: Auto-set. (line 321) * sidebar, Controlling Output Buffering with system(): I/O Functions. (line 135) * sidebar, Escape Sequences for Metacharacters: Escape Sequences. @@ -32490,7 +32499,7 @@ Index * substr() function: String Functions. (line 478) * Sumner, Andrew: Other Versions. (line 64) * switch statement: Switch Statement. (line 6) -* SYMTAB array: Auto-set. (line 274) +* SYMTAB array: Auto-set. (line 283) * syntactic ambiguity: /= operator vs. /=.../ regexp constant: Assignment Ops. (line 147) * system() function: I/O Functions. (line 72) @@ -32933,338 +32942,338 @@ Node: Built-in Variables404544 Node: User-modified405639 Ref: User-modified-Footnote-1413997 Node: Auto-set414059 -Ref: Auto-set-Footnote-1427137 -Ref: Auto-set-Footnote-2427342 -Node: ARGC and ARGV427398 -Node: Arrays431249 -Node: Array Basics432754 -Node: Array Intro433580 -Node: Reference to Elements437897 -Node: Assigning Elements440167 -Node: Array Example440658 -Node: Scanning an Array442390 -Node: Controlling Scanning444704 -Ref: Controlling Scanning-Footnote-1449791 -Node: Delete450107 -Ref: Delete-Footnote-1452872 -Node: Numeric Array Subscripts452929 -Node: Uninitialized Subscripts455112 -Node: Multidimensional456739 -Node: Multiscanning459832 -Node: Arrays of Arrays461421 -Node: Functions466061 -Node: Built-in466880 -Node: Calling Built-in467958 -Node: Numeric Functions469946 -Ref: Numeric Functions-Footnote-1473778 -Ref: Numeric Functions-Footnote-2474135 -Ref: Numeric Functions-Footnote-3474183 -Node: String Functions474452 -Ref: String Functions-Footnote-1497372 -Ref: String Functions-Footnote-2497501 -Ref: String Functions-Footnote-3497749 -Node: Gory Details497836 -Ref: table-sub-escapes499515 -Ref: table-sub-posix-92500869 -Ref: table-sub-proposed502220 -Ref: table-posix-sub503574 -Ref: table-gensub-escapes505119 -Ref: Gory Details-Footnote-1506295 -Ref: Gory Details-Footnote-2506346 -Node: I/O Functions506497 -Ref: I/O Functions-Footnote-1513482 -Node: Time Functions513629 -Ref: Time Functions-Footnote-1524562 -Ref: Time Functions-Footnote-2524630 -Ref: Time Functions-Footnote-3524788 -Ref: Time Functions-Footnote-4524899 -Ref: Time Functions-Footnote-5525011 -Ref: Time Functions-Footnote-6525238 -Node: Bitwise Functions525504 -Ref: table-bitwise-ops526066 -Ref: Bitwise Functions-Footnote-1530287 -Node: Type Functions530471 -Node: I18N Functions531622 -Node: User-defined533249 -Node: Definition Syntax534053 -Ref: Definition Syntax-Footnote-1538963 -Node: Function Example539032 -Node: Function Caveats541626 -Node: Calling A Function542047 -Node: Variable Scope543162 -Node: Pass By Value/Reference546125 -Node: Return Statement549633 -Node: Dynamic Typing552614 -Node: Indirect Calls553545 -Node: Library Functions563230 -Ref: Library Functions-Footnote-1566743 -Ref: Library Functions-Footnote-2566886 -Node: Library Names567057 -Ref: Library Names-Footnote-1570528 -Ref: Library Names-Footnote-2570748 -Node: General Functions570834 -Node: Strtonum Function571862 -Node: Assert Function574792 -Node: Round Function578118 -Node: Cliff Random Function579661 -Node: Ordinal Functions580677 -Ref: Ordinal Functions-Footnote-1583747 -Ref: Ordinal Functions-Footnote-2583999 -Node: Join Function584208 -Ref: Join Function-Footnote-1585979 -Node: Getlocaltime Function586179 -Node: Readfile Function589920 -Node: Data File Management591759 -Node: Filetrans Function592391 -Node: Rewind Function596460 -Node: File Checking597847 -Node: Empty Files598941 -Node: Ignoring Assigns601171 -Node: Getopt Function602724 -Ref: Getopt Function-Footnote-1614027 -Node: Passwd Functions614230 -Ref: Passwd Functions-Footnote-1623205 -Node: Group Functions623293 -Node: Walking Arrays631377 -Node: Sample Programs633514 -Node: Running Examples634188 -Node: Clones634916 -Node: Cut Program636140 -Node: Egrep Program645985 -Ref: Egrep Program-Footnote-1653758 -Node: Id Program653868 -Node: Split Program657484 -Ref: Split Program-Footnote-1661003 -Node: Tee Program661131 -Node: Uniq Program663934 -Node: Wc Program671363 -Ref: Wc Program-Footnote-1675629 -Ref: Wc Program-Footnote-2675829 -Node: Miscellaneous Programs675921 -Node: Dupword Program677109 -Node: Alarm Program679140 -Node: Translate Program683893 -Ref: Translate Program-Footnote-1688280 -Ref: Translate Program-Footnote-2688528 -Node: Labels Program688662 -Ref: Labels Program-Footnote-1692033 -Node: Word Sorting692117 -Node: History Sorting696001 -Node: Extract Program697840 -Ref: Extract Program-Footnote-1705343 -Node: Simple Sed705471 -Node: Igawk Program708533 -Ref: Igawk Program-Footnote-1723690 -Ref: Igawk Program-Footnote-2723891 -Node: Anagram Program724029 -Node: Signature Program727097 -Node: Advanced Features728197 -Node: Nondecimal Data730083 -Node: Array Sorting731666 -Node: Controlling Array Traversal732363 -Node: Array Sorting Functions740647 -Ref: Array Sorting Functions-Footnote-1744516 -Node: Two-way I/O744710 -Ref: Two-way I/O-Footnote-1750142 -Node: TCP/IP Networking750212 -Node: Profiling753056 -Node: Internationalization760553 -Node: I18N and L10N761978 -Node: Explaining gettext762664 -Ref: Explaining gettext-Footnote-1767732 -Ref: Explaining gettext-Footnote-2767916 -Node: Programmer i18n768081 -Node: Translator i18n772283 -Node: String Extraction773076 -Ref: String Extraction-Footnote-1774037 -Node: Printf Ordering774123 -Ref: Printf Ordering-Footnote-1776907 -Node: I18N Portability776971 -Ref: I18N Portability-Footnote-1779420 -Node: I18N Example779483 -Ref: I18N Example-Footnote-1782121 -Node: Gawk I18N782193 -Node: Debugger782814 -Node: Debugging783785 -Node: Debugging Concepts784218 -Node: Debugging Terms786074 -Node: Awk Debugging788671 -Node: Sample Debugging Session789563 -Node: Debugger Invocation790083 -Node: Finding The Bug791415 -Node: List of Debugger Commands797903 -Node: Breakpoint Control799237 -Node: Debugger Execution Control802901 -Node: Viewing And Changing Data806261 -Node: Execution Stack809617 -Node: Debugger Info811084 -Node: Miscellaneous Debugger Commands815066 -Node: Readline Support820242 -Node: Limitations821073 -Node: Arbitrary Precision Arithmetic823325 -Ref: Arbitrary Precision Arithmetic-Footnote-1824974 -Node: General Arithmetic825122 -Node: Floating Point Issues826842 -Node: String Conversion Precision827723 -Ref: String Conversion Precision-Footnote-1829428 -Node: Unexpected Results829537 -Node: POSIX Floating Point Problems831690 -Ref: POSIX Floating Point Problems-Footnote-1835515 -Node: Integer Programming835553 -Node: Floating-point Programming837292 -Ref: Floating-point Programming-Footnote-1843623 -Ref: Floating-point Programming-Footnote-2843893 -Node: Floating-point Representation844157 -Node: Floating-point Context845322 -Ref: table-ieee-formats846161 -Node: Rounding Mode847545 -Ref: table-rounding-modes848024 -Ref: Rounding Mode-Footnote-1851039 -Node: Gawk and MPFR851218 -Node: Arbitrary Precision Floats852473 -Ref: Arbitrary Precision Floats-Footnote-1854916 -Node: Setting Precision855232 -Ref: table-predefined-precision-strings855918 -Node: Setting Rounding Mode858063 -Ref: table-gawk-rounding-modes858467 -Node: Floating-point Constants859654 -Node: Changing Precision861083 -Ref: Changing Precision-Footnote-1862480 -Node: Exact Arithmetic862654 -Node: Arbitrary Precision Integers865792 -Ref: Arbitrary Precision Integers-Footnote-1868810 -Node: Dynamic Extensions868957 -Node: Extension Intro870415 -Node: Plugin License871680 -Node: Extension Mechanism Outline872365 -Ref: load-extension872782 -Ref: load-new-function874260 -Ref: call-new-function875255 -Node: Extension API Description877270 -Node: Extension API Functions Introduction878483 -Node: General Data Types883349 -Ref: General Data Types-Footnote-1888954 -Node: Requesting Values889253 -Ref: table-value-types-returned889984 -Node: Constructor Functions890938 -Node: Registration Functions893958 -Node: Extension Functions894643 -Node: Exit Callback Functions896868 -Node: Extension Version String898117 -Node: Input Parsers898767 -Node: Output Wrappers908524 -Node: Two-way processors913034 -Node: Printing Messages915242 -Ref: Printing Messages-Footnote-1916319 -Node: Updating `ERRNO'916471 -Node: Accessing Parameters917210 -Node: Symbol Table Access918440 -Node: Symbol table by name918952 -Node: Symbol table by cookie920699 -Ref: Symbol table by cookie-Footnote-1924829 -Node: Cached values924892 -Ref: Cached values-Footnote-1928341 -Node: Array Manipulation928432 -Ref: Array Manipulation-Footnote-1929530 -Node: Array Data 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Sample API Tests995865 -Node: Extension Sample Time996390 -Node: gawkextlib997754 -Node: Language History1000535 -Node: V7/SVR3.11002128 -Node: SVR41004448 -Node: POSIX1005890 -Node: BTL1007276 -Node: POSIX/GNU1008010 -Node: Feature History1013609 -Node: Common Extensions1026573 -Node: Ranges and Locales1027885 -Ref: Ranges and Locales-Footnote-11032503 -Ref: Ranges and Locales-Footnote-21032530 -Ref: Ranges and Locales-Footnote-31032790 -Node: Contributors1033011 -Node: Installation1038156 -Node: Gawk Distribution1039050 -Node: Getting1039534 -Node: Extracting1040360 -Node: Distribution contents1042052 -Node: Unix Installation1047757 -Node: Quick Installation1048374 -Node: Additional Configuration Options1050818 -Node: Configuration Philosophy1052554 -Node: Non-Unix Installation1054908 -Node: PC Installation1055366 -Node: PC Binary Installation1056665 -Node: PC Compiling1058513 -Node: PC Testing1061457 -Node: PC Using1062633 -Node: Cygwin1066818 -Node: MSYS1067818 -Node: VMS Installation1068332 -Node: VMS Compilation1069096 -Ref: VMS Compilation-Footnote-11070711 -Node: VMS Dynamic Extensions1070769 -Node: VMS Installation Details1072142 -Node: VMS Running1074389 -Node: VMS GNV1077223 -Node: VMS Old Gawk1077946 -Node: Bugs1078416 -Node: Other Versions1082334 -Node: Notes1088418 -Node: Compatibility Mode1089218 -Node: Additions1090001 -Node: Accessing The Source1090928 -Node: Adding Code1092368 -Node: New Ports1098413 -Node: Derived Files1102548 -Ref: Derived Files-Footnote-11107869 -Ref: Derived Files-Footnote-21107903 -Ref: Derived Files-Footnote-31108503 -Node: Future Extensions1108601 -Node: Implementation Limitations1109184 -Node: Extension Design1110436 -Node: Old Extension Problems1111590 -Ref: Old Extension Problems-Footnote-11113098 -Node: Extension New Mechanism Goals1113155 -Ref: Extension New Mechanism Goals-Footnote-11116520 -Node: Extension Other Design Decisions1116706 -Node: Extension Future Growth1118812 -Node: Old Extension Mechanism1119648 -Node: Basic Concepts1121388 -Node: Basic High Level1122069 -Ref: figure-general-flow1122340 -Ref: figure-process-flow1122939 -Ref: Basic High Level-Footnote-11126168 -Node: Basic Data Typing1126353 -Node: Glossary1129708 -Node: Copying1155170 -Node: GNU Free Documentation License1192727 -Node: Index1217864 +Ref: Auto-set-Footnote-1427529 +Ref: Auto-set-Footnote-2427734 +Node: ARGC and ARGV427790 +Node: Arrays431641 +Node: Array Basics433146 +Node: Array Intro433972 +Node: Reference to Elements438289 +Node: Assigning Elements440559 +Node: Array Example441050 +Node: Scanning an Array442782 +Node: Controlling Scanning445096 +Ref: Controlling Scanning-Footnote-1450183 +Node: Delete450499 +Ref: Delete-Footnote-1453264 +Node: Numeric Array Subscripts453321 +Node: Uninitialized Subscripts455504 +Node: Multidimensional457131 +Node: Multiscanning460224 +Node: Arrays of Arrays461813 +Node: Functions466453 +Node: Built-in467272 +Node: Calling Built-in468350 +Node: Numeric Functions470338 +Ref: Numeric Functions-Footnote-1474170 +Ref: Numeric Functions-Footnote-2474527 +Ref: Numeric Functions-Footnote-3474575 +Node: String Functions474844 +Ref: String Functions-Footnote-1497764 +Ref: String Functions-Footnote-2497893 +Ref: String Functions-Footnote-3498141 +Node: Gory Details498228 +Ref: table-sub-escapes499907 +Ref: table-sub-posix-92501261 +Ref: table-sub-proposed502612 +Ref: table-posix-sub503966 +Ref: table-gensub-escapes505511 +Ref: Gory Details-Footnote-1506687 +Ref: Gory Details-Footnote-2506738 +Node: I/O Functions506889 +Ref: I/O Functions-Footnote-1513874 +Node: Time Functions514021 +Ref: Time Functions-Footnote-1524954 +Ref: Time Functions-Footnote-2525022 +Ref: Time Functions-Footnote-3525180 +Ref: Time Functions-Footnote-4525291 +Ref: Time Functions-Footnote-5525403 +Ref: Time Functions-Footnote-6525630 +Node: Bitwise Functions525896 +Ref: table-bitwise-ops526458 +Ref: Bitwise Functions-Footnote-1530679 +Node: Type Functions530863 +Node: I18N Functions532014 +Node: User-defined533641 +Node: Definition Syntax534445 +Ref: Definition Syntax-Footnote-1539355 +Node: Function Example539424 +Node: Function Caveats542018 +Node: Calling A Function542439 +Node: Variable Scope543554 +Node: Pass By Value/Reference546517 +Node: Return Statement550025 +Node: Dynamic Typing553006 +Node: Indirect Calls553937 +Node: Library Functions563622 +Ref: Library Functions-Footnote-1567135 +Ref: Library Functions-Footnote-2567278 +Node: Library Names567449 +Ref: Library Names-Footnote-1570920 +Ref: Library Names-Footnote-2571140 +Node: General Functions571226 +Node: Strtonum Function572254 +Node: Assert Function575184 +Node: Round Function578510 +Node: Cliff Random Function580053 +Node: Ordinal Functions581069 +Ref: Ordinal Functions-Footnote-1584139 +Ref: Ordinal Functions-Footnote-2584391 +Node: Join Function584600 +Ref: Join Function-Footnote-1586371 +Node: Getlocaltime Function586571 +Node: Readfile Function590312 +Node: Data File 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Unexpected Results829929 +Node: POSIX Floating Point Problems832082 +Ref: POSIX Floating Point Problems-Footnote-1835907 +Node: Integer Programming835945 +Node: Floating-point Programming837684 +Ref: Floating-point Programming-Footnote-1844015 +Ref: Floating-point Programming-Footnote-2844285 +Node: Floating-point Representation844549 +Node: Floating-point Context845714 +Ref: table-ieee-formats846553 +Node: Rounding Mode847937 +Ref: table-rounding-modes848416 +Ref: Rounding Mode-Footnote-1851431 +Node: Gawk and MPFR851610 +Node: Arbitrary Precision Floats852865 +Ref: Arbitrary Precision Floats-Footnote-1855308 +Node: Setting Precision855624 +Ref: table-predefined-precision-strings856310 +Node: Setting Rounding Mode858455 +Ref: table-gawk-rounding-modes858859 +Node: Floating-point Constants860046 +Node: Changing Precision861475 +Ref: Changing Precision-Footnote-1862872 +Node: Exact Arithmetic863046 +Node: Arbitrary Precision Integers866184 +Ref: Arbitrary Precision Integers-Footnote-1869202 +Node: Dynamic Extensions869349 +Node: Extension Intro870807 +Node: Plugin License872072 +Node: Extension Mechanism Outline872757 +Ref: load-extension873174 +Ref: load-new-function874652 +Ref: call-new-function875647 +Node: Extension API Description877662 +Node: Extension API Functions Introduction878875 +Node: General Data Types883741 +Ref: General Data Types-Footnote-1889346 +Node: Requesting Values889645 +Ref: table-value-types-returned890376 +Node: Constructor Functions891330 +Node: Registration Functions894350 +Node: Extension Functions895035 +Node: Exit Callback Functions897260 +Node: Extension Version String898509 +Node: Input Parsers899159 +Node: Output Wrappers908916 +Node: Two-way processors913426 +Node: Printing Messages915634 +Ref: Printing Messages-Footnote-1916711 +Node: Updating `ERRNO'916863 +Node: Accessing Parameters917602 +Node: Symbol Table Access918832 +Node: Symbol table by name919344 +Node: Symbol table by cookie921091 +Ref: Symbol table by cookie-Footnote-1925221 +Node: Cached values925284 +Ref: Cached values-Footnote-1928733 +Node: Array Manipulation928824 +Ref: Array Manipulation-Footnote-1929922 +Node: Array Data Types929961 +Ref: Array Data Types-Footnote-1932664 +Node: Array Functions932756 +Node: Flattening Arrays936522 +Node: Creating Arrays943374 +Node: Extension API Variables948099 +Node: Extension Versioning948735 +Node: Extension API Informational Variables950636 +Node: Extension API Boilerplate951722 +Node: Finding Extensions955526 +Node: Extension Example956086 +Node: Internal File Description956816 +Node: Internal File Ops960907 +Ref: Internal File Ops-Footnote-1972415 +Node: Using Internal File Ops972555 +Ref: Using Internal File Ops-Footnote-1974908 +Node: Extension Samples975174 +Node: Extension Sample File Functions976698 +Node: Extension Sample Fnmatch985183 +Node: Extension Sample Fork986909 +Node: Extension Sample Inplace988127 +Node: Extension Sample Ord989905 +Node: Extension Sample Readdir990741 +Node: Extension Sample Revout992273 +Node: Extension Sample Rev2way992866 +Node: Extension Sample Read write array993556 +Node: Extension Sample Readfile995439 +Node: Extension Sample API Tests996257 +Node: Extension Sample Time996782 +Node: gawkextlib998146 +Node: Language History1000927 +Node: V7/SVR3.11002520 +Node: SVR41004840 +Node: POSIX1006282 +Node: BTL1007668 +Node: POSIX/GNU1008402 +Node: Feature History1014001 +Node: Common Extensions1026965 +Node: Ranges and Locales1028277 +Ref: Ranges and Locales-Footnote-11032895 +Ref: Ranges and Locales-Footnote-21032922 +Ref: Ranges and Locales-Footnote-31033182 +Node: Contributors1033403 +Node: Installation1038548 +Node: Gawk Distribution1039442 +Node: Getting1039926 +Node: Extracting1040752 +Node: Distribution contents1042444 +Node: Unix Installation1048149 +Node: Quick Installation1048766 +Node: Additional Configuration Options1051210 +Node: Configuration Philosophy1052946 +Node: Non-Unix Installation1055300 +Node: PC Installation1055758 +Node: PC Binary Installation1057057 +Node: PC Compiling1058905 +Node: PC Testing1061849 +Node: PC Using1063025 +Node: Cygwin1067210 +Node: MSYS1068210 +Node: VMS Installation1068724 +Node: VMS Compilation1069488 +Ref: VMS Compilation-Footnote-11071103 +Node: VMS Dynamic Extensions1071161 +Node: VMS Installation Details1072534 +Node: VMS Running1074781 +Node: VMS GNV1077615 +Node: VMS Old Gawk1078338 +Node: Bugs1078808 +Node: Other Versions1082726 +Node: Notes1088810 +Node: Compatibility Mode1089610 +Node: Additions1090393 +Node: Accessing The Source1091320 +Node: Adding Code1092760 +Node: New Ports1098805 +Node: Derived Files1102940 +Ref: Derived Files-Footnote-11108261 +Ref: Derived Files-Footnote-21108295 +Ref: Derived Files-Footnote-31108895 +Node: Future Extensions1108993 +Node: Implementation Limitations1109576 +Node: Extension Design1110828 +Node: Old Extension Problems1111982 +Ref: Old Extension Problems-Footnote-11113490 +Node: Extension New Mechanism Goals1113547 +Ref: Extension New Mechanism Goals-Footnote-11116912 +Node: Extension Other Design Decisions1117098 +Node: Extension Future Growth1119204 +Node: Old Extension Mechanism1120040 +Node: Basic Concepts1121780 +Node: Basic High Level1122461 +Ref: figure-general-flow1122732 +Ref: figure-process-flow1123331 +Ref: Basic High Level-Footnote-11126560 +Node: Basic Data Typing1126745 +Node: Glossary1130100 +Node: Copying1155562 +Node: GNU Free Documentation License1193119 +Node: Index1218256 End Tag Table diff --git a/doc/gawk.texi b/doc/gawk.texi index b396f9e0..c7eb3988 100644 --- a/doc/gawk.texi +++ b/doc/gawk.texi @@ -13700,10 +13700,18 @@ it is 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, -@code{ENVIRON["HOME"]} might be @file{/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. -@c (In a future version of @command{gawk}, it may do so.) +@code{ENVIRON["HOME"]} might be @file{/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 @@ -35908,9 +35916,10 @@ 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: @@ -35935,7 +35944,8 @@ 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 2e6928e0..2ef3d077 100644 --- a/doc/gawktexi.in +++ b/doc/gawktexi.in @@ -13085,10 +13085,18 @@ it is 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, -@code{ENVIRON["HOME"]} might be @file{/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. -@c (In a future version of @command{gawk}, it may do so.) +@code{ENVIRON["HOME"]} might be @file{/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 @@ -35057,9 +35065,10 @@ 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: @@ -35084,7 +35093,8 @@ 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 |