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 | 780 | ||||
| -rw-r--r-- | doc/gawk.texi | 26 | ||||
| -rw-r--r-- | doc/gawktexi.in | 26 |
5 files changed, 443 insertions, 404 deletions
diff --git a/doc/ChangeLog b/doc/ChangeLog index 41671458..b9909498 100644 --- a/doc/ChangeLog +++ b/doc/ChangeLog @@ -185,7 +185,7 @@ 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> @@ -259,6 +259,11 @@ * 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 5587b9e8..1824c649 100644 --- a/doc/gawk.info +++ b/doc/gawk.info @@ -9814,10 +9814,18 @@ 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 @@ -30992,9 +31000,9 @@ 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) @@ -31178,12 +31186,12 @@ 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) @@ -31206,7 +31214,7 @@ 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) @@ -31216,7 +31224,7 @@ 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. @@ -31224,7 +31232,7 @@ 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. @@ -31265,8 +31273,8 @@ 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) @@ -31321,13 +31329,13 @@ 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) @@ -31381,7 +31389,7 @@ 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) @@ -31460,7 +31468,7 @@ 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) @@ -31530,9 +31538,9 @@ 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. @@ -31582,7 +31590,7 @@ Index * FSF (Free Software Foundation): Manual History. (line 6) * fts() extension function: Extension Sample File Functions. (line 77) -* 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) @@ -31632,7 +31640,7 @@ Index * G-d: Acknowledgments. (line 78) * 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) @@ -31653,7 +31661,7 @@ 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 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) @@ -31670,7 +31678,7 @@ 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. @@ -31701,7 +31709,7 @@ Index * gawk, OS/2 version of: PC Using. (line 16) * 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 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. @@ -31709,14 +31717,14 @@ 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) @@ -31803,7 +31811,7 @@ 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. @@ -32098,7 +32106,7 @@ 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) * McPhee, Patrick: Contributors. (line 100) * message object files: Explaining gettext. (line 41) * message object files, converting from portable object files: I18N Example. @@ -32110,7 +32118,7 @@ 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 103) @@ -32164,7 +32172,7 @@ 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. @@ -32173,9 +32181,9 @@ 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. @@ -32290,7 +32298,7 @@ Index * p debugger command (alias for print): Viewing And Changing Data. (line 36) * P1003.1 POSIX standard: Glossary. (line 454) -* 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) @@ -32455,24 +32463,24 @@ 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 116) * 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. @@ -32632,7 +32640,7 @@ Index * right shift: Bitwise Functions. (line 52) * right shift, bitwise: Bitwise Functions. (line 32) * Ritchie, Dennis: Basic Data Typing. (line 55) -* 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) @@ -32661,9 +32669,9 @@ 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) @@ -32683,7 +32691,7 @@ Index * scanning arrays: Scanning an Array. (line 6) * scanning multidimensional arrays: Multiscanning. (line 11) * Schorr, Andrew <1>: Contributors. (line 131) -* 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) @@ -32771,7 +32779,7 @@ 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. @@ -32933,9 +32941,9 @@ 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) @@ -33113,10 +33121,10 @@ 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) @@ -33395,342 +33403,342 @@ Node: Built-in Variables409298 Node: User-modified410394 Ref: User-modified-Footnote-1418079 Node: Auto-set418141 -Ref: Auto-set-Footnote-1430706 -Ref: Auto-set-Footnote-2430911 -Node: ARGC and ARGV430967 -Node: Arrays434821 -Node: Array Basics436319 -Node: Array Intro437145 -Ref: figure-array-elements439118 -Node: Reference to Elements441525 -Node: Assigning Elements443798 -Node: Array Example444289 -Node: Scanning an Array446021 -Node: Controlling Scanning449036 -Ref: Controlling Scanning-Footnote-1454209 -Node: Delete454525 -Ref: Delete-Footnote-1457290 -Node: Numeric Array Subscripts457347 -Node: Uninitialized Subscripts459530 -Node: Multidimensional461155 -Node: Multiscanning464248 -Node: Arrays of Arrays465837 -Node: Functions470477 -Node: Built-in471296 -Node: Calling Built-in472374 -Node: Numeric Functions474362 -Ref: Numeric Functions-Footnote-1478196 -Ref: Numeric Functions-Footnote-2478553 -Ref: Numeric Functions-Footnote-3478601 -Node: String Functions478870 -Ref: String Functions-Footnote-1501881 -Ref: String Functions-Footnote-2502010 -Ref: String Functions-Footnote-3502258 -Node: Gory Details502345 -Ref: table-sub-escapes504014 -Ref: table-sub-posix-92505368 -Ref: table-sub-proposed506719 -Ref: table-posix-sub508073 -Ref: table-gensub-escapes509618 -Ref: Gory Details-Footnote-1510794 -Ref: Gory Details-Footnote-2510845 -Node: I/O Functions510996 -Ref: I/O Functions-Footnote-1518119 -Node: Time Functions518266 -Ref: Time Functions-Footnote-1528730 -Ref: Time Functions-Footnote-2528798 -Ref: Time Functions-Footnote-3528956 -Ref: Time Functions-Footnote-4529067 -Ref: Time Functions-Footnote-5529179 -Ref: Time Functions-Footnote-6529406 -Node: Bitwise Functions529672 -Ref: table-bitwise-ops530234 -Ref: Bitwise Functions-Footnote-1534479 -Node: Type Functions534663 -Node: I18N Functions535805 -Node: User-defined537450 -Node: Definition Syntax538254 -Ref: Definition Syntax-Footnote-1543169 -Node: Function Example543238 -Ref: Function Example-Footnote-1545882 -Node: Function Caveats545904 -Node: Calling A Function546422 -Node: Variable Scope547377 -Node: Pass By Value/Reference550365 -Node: Return Statement553873 -Node: Dynamic Typing556855 -Node: Indirect Calls557784 -Node: Library Functions567471 -Ref: Library Functions-Footnote-1570984 -Ref: Library Functions-Footnote-2571127 -Node: Library Names571298 -Ref: Library Names-Footnote-1574771 -Ref: Library Names-Footnote-2574991 -Node: General Functions575077 -Node: Strtonum Function576105 -Node: Assert Function579035 -Node: Round Function582361 -Node: Cliff Random Function583902 -Node: Ordinal Functions584918 -Ref: Ordinal Functions-Footnote-1587995 -Ref: Ordinal Functions-Footnote-2588247 -Node: Join Function588458 -Ref: Join Function-Footnote-1590229 -Node: Getlocaltime Function590429 -Node: Readfile Function594170 -Node: Data File Management596009 -Node: Filetrans Function596641 -Node: Rewind Function600710 -Node: File Checking602097 -Node: Empty Files603191 -Node: Ignoring Assigns605421 -Node: Getopt Function606975 -Ref: Getopt Function-Footnote-1618278 -Node: Passwd Functions618481 -Ref: Passwd Functions-Footnote-1627459 -Node: Group Functions627547 -Node: Walking Arrays635631 -Node: Sample Programs637767 -Node: Running Examples638441 -Node: Clones639169 -Node: Cut Program640393 -Node: Egrep Program650244 -Ref: Egrep Program-Footnote-1658017 -Node: Id Program658127 -Node: Split Program661776 -Ref: Split Program-Footnote-1665295 -Node: Tee Program665423 -Node: Uniq Program668226 -Node: Wc Program675655 -Ref: Wc Program-Footnote-1679921 -Ref: Wc Program-Footnote-2680121 -Node: Miscellaneous Programs680213 -Node: Dupword Program681401 -Node: Alarm Program683432 -Node: Translate Program688239 -Ref: Translate Program-Footnote-1692626 -Ref: Translate Program-Footnote-2692874 -Node: Labels Program693008 -Ref: Labels Program-Footnote-1696379 -Node: Word Sorting696463 -Node: History Sorting700347 -Node: Extract Program702186 -Ref: Extract Program-Footnote-1709689 -Node: Simple Sed709817 -Node: Igawk Program712879 -Ref: Igawk Program-Footnote-1728050 -Ref: Igawk Program-Footnote-2728251 -Node: Anagram Program728389 -Node: Signature Program731457 -Node: Advanced Features732557 -Node: Nondecimal Data734443 -Node: Array Sorting736026 -Node: Controlling Array Traversal736723 -Node: Array Sorting Functions745007 -Ref: Array Sorting Functions-Footnote-1748876 -Node: Two-way I/O749070 -Ref: Two-way I/O-Footnote-1754502 -Node: TCP/IP Networking754584 -Node: Profiling757428 -Node: Internationalization764931 -Node: I18N and L10N766356 -Node: Explaining gettext767042 -Ref: Explaining gettext-Footnote-1772110 -Ref: Explaining gettext-Footnote-2772294 -Node: Programmer i18n772459 -Node: Translator i18n776686 -Node: String Extraction777480 -Ref: String Extraction-Footnote-1778441 -Node: Printf Ordering778527 -Ref: Printf Ordering-Footnote-1781309 -Node: I18N Portability781373 -Ref: I18N Portability-Footnote-1783822 -Node: I18N Example783885 -Ref: I18N Example-Footnote-1786523 -Node: Gawk I18N786595 -Node: Debugger787216 -Node: Debugging788187 -Node: Debugging Concepts788620 -Node: Debugging Terms790476 -Node: Awk Debugging793073 -Node: Sample Debugging Session793965 -Node: Debugger Invocation794485 -Node: Finding The Bug795818 -Node: List of Debugger Commands802305 -Node: Breakpoint Control803639 -Node: Debugger Execution Control807303 -Node: Viewing And Changing Data810663 -Node: Execution Stack814019 -Node: Debugger Info815486 -Node: Miscellaneous Debugger Commands819480 -Node: Readline Support824658 -Node: Limitations825489 -Node: Arbitrary Precision Arithmetic827741 -Ref: Arbitrary Precision Arithmetic-Footnote-1829390 -Node: General Arithmetic829538 -Node: Floating Point Issues831258 -Node: String Conversion Precision832139 -Ref: String Conversion Precision-Footnote-1833844 -Node: Unexpected Results833953 -Node: POSIX Floating Point Problems836106 -Ref: POSIX Floating Point Problems-Footnote-1839931 -Node: Integer Programming839969 -Node: Floating-point Programming841708 -Ref: Floating-point Programming-Footnote-1848039 -Ref: Floating-point Programming-Footnote-2848309 -Node: Floating-point Representation848573 -Node: Floating-point Context849738 -Ref: table-ieee-formats850577 -Node: Rounding Mode851961 -Ref: table-rounding-modes852440 -Ref: Rounding Mode-Footnote-1855455 -Node: Gawk and MPFR855634 -Node: Arbitrary Precision Floats857043 -Ref: Arbitrary Precision Floats-Footnote-1859486 -Node: Setting Precision859802 -Ref: table-predefined-precision-strings860488 -Node: Setting Rounding Mode862633 -Ref: table-gawk-rounding-modes863037 -Node: Floating-point Constants864224 -Node: Changing Precision865653 -Ref: Changing Precision-Footnote-1867050 -Node: Exact Arithmetic867224 -Node: Arbitrary Precision Integers870362 -Ref: Arbitrary Precision Integers-Footnote-1873377 -Node: Dynamic Extensions873524 -Node: Extension Intro874982 -Node: Plugin License876247 -Node: Extension Mechanism Outline876932 -Ref: load-extension877349 -Ref: load-new-function878827 -Ref: call-new-function879822 -Node: Extension API Description881837 -Node: Extension API Functions Introduction883124 -Node: General Data Types888051 -Ref: General Data Types-Footnote-1893746 -Node: Requesting Values894045 -Ref: table-value-types-returned894782 -Node: Memory Allocation Functions895736 -Ref: Memory Allocation Functions-Footnote-1898482 -Node: Constructor Functions898578 -Node: Registration Functions900336 -Node: Extension Functions901021 -Node: Exit Callback Functions903323 -Node: Extension Version String904572 -Node: Input Parsers905222 -Node: Output Wrappers914979 -Node: Two-way processors919489 -Node: Printing Messages921697 -Ref: Printing Messages-Footnote-1922774 -Node: Updating `ERRNO'922926 -Node: Accessing Parameters923665 -Node: Symbol Table Access924895 -Node: Symbol table by name925409 -Node: Symbol table by cookie927385 -Ref: Symbol table by cookie-Footnote-1931517 -Node: Cached 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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 @@ -36990,9 +36998,10 @@ 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: @@ -37020,7 +37029,8 @@ 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 f54748e6..d45cae06 100644 --- a/doc/gawktexi.in +++ b/doc/gawktexi.in @@ -13447,10 +13447,18 @@ 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 @@ -36134,9 +36142,10 @@ 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: @@ -36164,7 +36173,8 @@ 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 |