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 | 741 | ||||
| -rw-r--r-- | doc/gawk.texi | 26 | ||||
| -rw-r--r-- | doc/gawktexi.in | 26 |
5 files changed, 424 insertions, 384 deletions
diff --git a/doc/ChangeLog b/doc/ChangeLog index 99b81306..ac48a973 100644 --- a/doc/ChangeLog +++ b/doc/ChangeLog @@ -89,7 +89,7 @@ 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> @@ -163,6 +163,11 @@ * 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 9a569829..74773fcb 100644 --- a/doc/gawk.info +++ b/doc/gawk.info @@ -9716,9 +9716,18 @@ 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 @@ -30801,9 +30810,9 @@ 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) @@ -30974,12 +30983,12 @@ 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 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) @@ -31002,21 +31011,21 @@ 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. (line 346) * differences in awk and gawk, strings: Scalar Constants. (line 20) * differences in awk and gawk, strings, storing: Records. (line 191) -* 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. @@ -31097,13 +31106,13 @@ 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) @@ -31217,7 +31226,7 @@ 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) @@ -31285,9 +31294,9 @@ Index * floating-point, VAX/VMS: VMS Running. (line 51) * fnmatch() extension function: Extension Sample Fnmatch. (line 12) -* 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. @@ -31334,7 +31343,7 @@ 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) @@ -31403,7 +31412,7 @@ 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) @@ -31420,7 +31429,7 @@ Index * gawk, FPAT variable in <1>: User-modified. (line 45) * gawk, FPAT variable in: Splitting By Content. (line 27) -* 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. @@ -31451,7 +31460,7 @@ Index * gawk, OS/2 version of: PC Using. (line 10) * 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. @@ -31459,7 +31468,7 @@ 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) @@ -31468,7 +31477,7 @@ Index * 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 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) @@ -31880,16 +31889,16 @@ 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. @@ -32170,7 +32179,7 @@ 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 179) @@ -32327,7 +32336,7 @@ 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) @@ -32355,9 +32364,9 @@ 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) @@ -32442,7 +32451,7 @@ 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. @@ -32585,7 +32594,7 @@ 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) @@ -33029,341 +33038,341 @@ Node: Built-in Variables404414 Node: User-modified405509 Ref: User-modified-Footnote-1413867 Node: Auto-set413929 -Ref: Auto-set-Footnote-1427007 -Ref: Auto-set-Footnote-2427212 -Node: ARGC and ARGV427268 -Node: Arrays431119 -Node: Array Basics432624 -Node: Array Intro433450 -Node: Reference to Elements437767 -Node: Assigning Elements440037 -Node: Array Example440528 -Node: Scanning an Array442260 -Node: Controlling Scanning444574 -Ref: Controlling Scanning-Footnote-1449661 -Node: Delete449977 -Ref: Delete-Footnote-1452742 -Node: Numeric Array Subscripts452799 -Node: Uninitialized Subscripts454982 -Node: Multidimensional456609 -Node: Multiscanning459702 -Node: Arrays of Arrays461291 -Node: Functions465931 -Node: Built-in466750 -Node: Calling Built-in467828 -Node: Numeric Functions469816 -Ref: Numeric Functions-Footnote-1473648 -Ref: Numeric Functions-Footnote-2474005 -Ref: Numeric Functions-Footnote-3474053 -Node: String Functions474322 -Ref: String Functions-Footnote-1497242 -Ref: String Functions-Footnote-2497371 -Ref: String Functions-Footnote-3497619 -Node: Gory Details497706 -Ref: table-sub-escapes499385 -Ref: table-sub-posix-92500739 -Ref: table-sub-proposed502090 -Ref: table-posix-sub503444 -Ref: table-gensub-escapes504989 -Ref: Gory Details-Footnote-1506165 -Ref: Gory Details-Footnote-2506216 -Node: I/O Functions506367 -Ref: I/O Functions-Footnote-1513357 -Node: Time Functions513504 -Ref: Time Functions-Footnote-1524437 -Ref: Time Functions-Footnote-2524505 -Ref: Time Functions-Footnote-3524663 -Ref: Time Functions-Footnote-4524774 -Ref: Time Functions-Footnote-5524886 -Ref: Time Functions-Footnote-6525113 -Node: Bitwise Functions525379 -Ref: table-bitwise-ops525941 -Ref: Bitwise Functions-Footnote-1530162 -Node: Type Functions530346 -Node: I18N Functions531497 -Node: User-defined533124 -Node: Definition Syntax533928 -Ref: Definition Syntax-Footnote-1538842 -Node: Function Example538911 -Ref: Function Example-Footnote-1541560 -Node: Function Caveats541582 -Node: Calling A Function542100 -Node: Variable Scope543055 -Node: Pass By Value/Reference546018 -Node: Return Statement549526 -Node: Dynamic Typing552507 -Node: Indirect Calls553438 -Node: Library Functions563125 -Ref: Library Functions-Footnote-1566638 -Ref: Library Functions-Footnote-2566781 -Node: Library Names566952 -Ref: Library Names-Footnote-1570425 -Ref: Library Names-Footnote-2570645 -Node: General Functions570731 -Node: Strtonum Function571759 -Node: Assert Function574689 -Node: Round Function578015 -Node: Cliff Random Function579556 -Node: Ordinal Functions580572 -Ref: Ordinal Functions-Footnote-1583649 -Ref: Ordinal Functions-Footnote-2583901 -Node: Join Function584112 -Ref: Join Function-Footnote-1585883 -Node: Getlocaltime Function586083 -Node: Readfile Function589824 -Node: Data File Management591663 -Node: Filetrans Function592295 -Node: Rewind Function596364 -Node: File Checking597751 -Node: Empty Files598845 -Node: Ignoring Assigns601075 -Node: Getopt Function602629 -Ref: Getopt Function-Footnote-1613932 -Node: Passwd Functions614135 -Ref: Passwd Functions-Footnote-1623113 -Node: Group Functions623201 -Node: Walking Arrays631285 -Node: Sample Programs633421 -Node: Running Examples634095 -Node: Clones634823 -Node: Cut Program636047 -Node: Egrep Program645898 -Ref: Egrep Program-Footnote-1653671 -Node: Id Program653781 -Node: Split Program657397 -Ref: Split Program-Footnote-1660916 -Node: Tee Program661044 -Node: Uniq Program663847 -Node: Wc Program671276 -Ref: Wc Program-Footnote-1675542 -Ref: Wc Program-Footnote-2675742 -Node: Miscellaneous Programs675834 -Node: Dupword Program677022 -Node: Alarm Program679053 -Node: Translate Program683860 -Ref: Translate Program-Footnote-1688247 -Ref: Translate Program-Footnote-2688495 -Node: Labels Program688629 -Ref: Labels Program-Footnote-1692000 -Node: Word Sorting692084 -Node: History Sorting695968 -Node: Extract Program697807 -Ref: Extract Program-Footnote-1705310 -Node: Simple Sed705438 -Node: Igawk Program708500 -Ref: Igawk Program-Footnote-1723657 -Ref: Igawk Program-Footnote-2723858 -Node: Anagram Program723996 -Node: Signature Program727064 -Node: Advanced Features728164 -Node: Nondecimal Data730050 -Node: Array Sorting731633 -Node: Controlling Array Traversal732330 -Node: Array Sorting Functions740614 -Ref: Array Sorting Functions-Footnote-1744483 -Node: Two-way I/O744677 -Ref: Two-way I/O-Footnote-1750109 -Node: TCP/IP Networking750191 -Node: Profiling753035 -Node: Internationalization760538 -Node: I18N and L10N761963 -Node: Explaining gettext762649 -Ref: Explaining gettext-Footnote-1767717 -Ref: Explaining gettext-Footnote-2767901 -Node: Programmer i18n768066 -Node: Translator i18n772268 -Node: String Extraction773062 -Ref: String Extraction-Footnote-1774023 -Node: Printf Ordering774109 -Ref: Printf Ordering-Footnote-1776891 -Node: I18N Portability776955 -Ref: I18N Portability-Footnote-1779404 -Node: I18N Example779467 -Ref: I18N Example-Footnote-1782105 -Node: Gawk I18N782177 -Node: Debugger782798 -Node: Debugging783769 -Node: Debugging Concepts784202 -Node: Debugging Terms786058 -Node: Awk Debugging788655 -Node: Sample Debugging Session789547 -Node: Debugger Invocation790067 -Node: Finding The Bug791400 -Node: List of Debugger Commands797887 -Node: Breakpoint Control799221 -Node: Debugger Execution Control802885 -Node: Viewing And Changing Data806245 -Node: Execution Stack809601 -Node: Debugger Info811068 -Node: Miscellaneous Debugger Commands815050 -Node: Readline Support820226 -Node: Limitations821057 -Node: Arbitrary Precision Arithmetic823309 -Ref: Arbitrary Precision Arithmetic-Footnote-1824958 -Node: General Arithmetic825106 -Node: Floating Point Issues826826 -Node: String Conversion Precision827707 -Ref: String Conversion Precision-Footnote-1829412 -Node: Unexpected Results829521 -Node: POSIX Floating Point Problems831674 -Ref: POSIX Floating Point Problems-Footnote-1835499 -Node: Integer Programming835537 -Node: Floating-point Programming837276 -Ref: Floating-point Programming-Footnote-1843607 -Ref: Floating-point Programming-Footnote-2843877 -Node: Floating-point Representation844141 -Node: Floating-point Context845306 -Ref: table-ieee-formats846145 -Node: Rounding Mode847529 -Ref: table-rounding-modes848008 -Ref: Rounding Mode-Footnote-1851023 -Node: Gawk and MPFR851202 -Node: Arbitrary Precision Floats852457 -Ref: Arbitrary Precision Floats-Footnote-1854900 -Node: Setting Precision855216 -Ref: table-predefined-precision-strings855902 -Node: Setting Rounding Mode858047 -Ref: table-gawk-rounding-modes858451 -Node: Floating-point Constants859638 -Node: Changing Precision861067 -Ref: Changing Precision-Footnote-1862464 -Node: Exact Arithmetic862638 -Node: Arbitrary Precision Integers865776 -Ref: Arbitrary Precision Integers-Footnote-1868791 -Node: Dynamic Extensions868938 -Node: Extension Intro870396 -Node: Plugin License871661 -Node: Extension Mechanism Outline872346 -Ref: load-extension872763 -Ref: load-new-function874241 -Ref: call-new-function875236 -Node: Extension API Description877251 -Node: Extension API Functions Introduction878538 -Node: General Data Types883465 -Ref: General Data Types-Footnote-1889160 -Node: Requesting Values889459 -Ref: table-value-types-returned890196 -Node: Memory Allocation Functions891150 -Ref: Memory Allocation Functions-Footnote-1893896 -Node: Constructor Functions893992 -Node: Registration Functions895750 -Node: Extension Functions896435 -Node: Exit Callback Functions898737 -Node: Extension Version String899986 -Node: Input Parsers900636 -Node: Output Wrappers910393 -Node: Two-way processors914903 -Node: Printing Messages917111 -Ref: Printing Messages-Footnote-1918188 -Node: Updating `ERRNO'918340 -Node: Accessing Parameters919079 -Node: Symbol Table Access920309 -Node: Symbol table by name920823 -Node: Symbol table by cookie922572 -Ref: Symbol table by cookie-Footnote-1926704 -Node: Cached values926767 -Ref: Cached values-Footnote-1930257 -Node: Array Manipulation930348 -Ref: Array Manipulation-Footnote-1931446 -Node: Array Data Types931485 -Ref: Array Data Types-Footnote-1934188 -Node: Array Functions934280 -Node: Flattening Arrays938116 -Node: Creating Arrays944968 -Node: Extension API Variables949693 -Node: Extension Versioning950329 -Node: Extension API Informational Variables952230 -Node: Extension API Boilerplate953316 -Node: Finding Extensions957120 -Node: Extension Example957680 -Node: Internal File Description958410 -Node: Internal File Ops962501 -Ref: Internal File Ops-Footnote-1974010 -Node: Using Internal File Ops974150 -Ref: Using Internal File Ops-Footnote-1976503 -Node: Extension Samples976769 -Node: Extension Sample File Functions978293 -Node: Extension Sample Fnmatch986778 -Node: Extension Sample Fork988547 -Node: Extension Sample Inplace989760 -Node: Extension Sample Ord991538 -Node: Extension Sample Readdir992374 -Node: Extension Sample Revout993906 -Node: Extension Sample Rev2way994499 -Node: Extension Sample Read write array995189 -Node: Extension Sample Readfile997072 -Node: Extension Sample API Tests997890 -Node: Extension Sample Time998415 -Node: gawkextlib999779 -Node: Language History1002560 -Node: V7/SVR3.11004153 -Node: SVR41006473 -Node: POSIX1007915 -Node: BTL1009301 -Node: POSIX/GNU1010035 -Node: Feature History1015634 -Node: Common Extensions1028610 -Node: Ranges and Locales1029922 -Ref: Ranges and Locales-Footnote-11034539 -Ref: Ranges and Locales-Footnote-21034566 -Ref: Ranges and Locales-Footnote-31034800 -Node: Contributors1035021 -Node: Installation1040166 -Node: Gawk Distribution1041060 -Node: Getting1041544 -Node: Extracting1042370 -Node: Distribution contents1044062 -Node: Unix Installation1049767 -Node: Quick Installation1050384 -Node: Additional Configuration Options1052830 -Node: Configuration Philosophy1054566 -Node: Non-Unix Installation1056920 -Node: PC Installation1057378 -Node: PC Binary Installation1058677 -Node: PC Compiling1060525 -Node: PC Testing1063469 -Node: PC Using1064645 -Node: Cygwin1068813 -Node: MSYS1069622 -Node: VMS Installation1070136 -Node: VMS Compilation1070900 -Ref: VMS Compilation-Footnote-11072152 -Node: VMS Dynamic Extensions1072210 -Node: VMS Installation Details1073583 -Node: VMS Running1075834 -Node: VMS GNV1078668 -Node: VMS Old Gawk1079391 -Node: Bugs1079861 -Node: Other Versions1083779 -Node: Notes1089863 -Node: Compatibility Mode1090663 -Node: Additions1091446 -Node: Accessing The Source1092373 -Node: Adding Code1093813 -Node: New Ports1099858 -Node: Derived Files1103993 -Ref: Derived Files-Footnote-11109314 -Ref: Derived Files-Footnote-21109348 -Ref: Derived Files-Footnote-31109948 -Node: Future Extensions1110046 -Node: Implementation Limitations1110629 -Node: Extension Design1111881 -Node: Old Extension Problems1113035 -Ref: Old Extension Problems-Footnote-11114543 -Node: Extension New Mechanism Goals1114600 -Ref: Extension New Mechanism Goals-Footnote-11117965 -Node: Extension Other Design Decisions1118151 -Node: Extension Future Growth1120257 -Node: Old Extension Mechanism1121093 -Node: Basic Concepts1122833 -Node: Basic High Level1123514 -Ref: figure-general-flow1123785 -Ref: figure-process-flow1124384 -Ref: Basic High Level-Footnote-11127613 -Node: Basic Data Typing1127798 -Node: Glossary1131153 -Node: Copying1156615 -Node: GNU Free Documentation License1194172 -Node: Index1219309 +Ref: Auto-set-Footnote-1427399 +Ref: Auto-set-Footnote-2427604 +Node: ARGC and ARGV427660 +Node: Arrays431511 +Node: Array Basics433016 +Node: Array Intro433842 +Node: Reference to Elements438159 +Node: Assigning Elements440429 +Node: Array Example440920 +Node: Scanning an Array442652 +Node: Controlling Scanning444966 +Ref: Controlling Scanning-Footnote-1450053 +Node: Delete450369 +Ref: Delete-Footnote-1453134 +Node: Numeric Array Subscripts453191 +Node: Uninitialized Subscripts455374 +Node: Multidimensional457001 +Node: Multiscanning460094 +Node: Arrays of Arrays461683 +Node: Functions466323 +Node: Built-in467142 +Node: Calling Built-in468220 +Node: Numeric Functions470208 +Ref: Numeric Functions-Footnote-1474040 +Ref: Numeric Functions-Footnote-2474397 +Ref: Numeric Functions-Footnote-3474445 +Node: String Functions474714 +Ref: String Functions-Footnote-1497634 +Ref: String Functions-Footnote-2497763 +Ref: String Functions-Footnote-3498011 +Node: Gory Details498098 +Ref: table-sub-escapes499777 +Ref: table-sub-posix-92501131 +Ref: table-sub-proposed502482 +Ref: table-posix-sub503836 +Ref: table-gensub-escapes505381 +Ref: Gory Details-Footnote-1506557 +Ref: Gory Details-Footnote-2506608 +Node: I/O Functions506759 +Ref: I/O Functions-Footnote-1513749 +Node: Time Functions513896 +Ref: Time Functions-Footnote-1524829 +Ref: Time Functions-Footnote-2524897 +Ref: Time Functions-Footnote-3525055 +Ref: Time Functions-Footnote-4525166 +Ref: Time Functions-Footnote-5525278 +Ref: Time Functions-Footnote-6525505 +Node: Bitwise Functions525771 +Ref: table-bitwise-ops526333 +Ref: Bitwise Functions-Footnote-1530554 +Node: Type Functions530738 +Node: I18N Functions531889 +Node: User-defined533516 +Node: Definition Syntax534320 +Ref: Definition Syntax-Footnote-1539234 +Node: Function Example539303 +Ref: Function Example-Footnote-1541952 +Node: Function Caveats541974 +Node: Calling A Function542492 +Node: Variable Scope543447 +Node: Pass By Value/Reference546410 +Node: Return Statement549918 +Node: Dynamic Typing552899 +Node: Indirect Calls553830 +Node: Library Functions563517 +Ref: Library Functions-Footnote-1567030 +Ref: Library Functions-Footnote-2567173 +Node: Library Names567344 +Ref: Library Names-Footnote-1570817 +Ref: Library Names-Footnote-2571037 +Node: General Functions571123 +Node: Strtonum Function572151 +Node: Assert Function575081 +Node: Round Function578407 +Node: Cliff Random Function579948 +Node: Ordinal Functions580964 +Ref: Ordinal Functions-Footnote-1584041 +Ref: Ordinal Functions-Footnote-2584293 +Node: Join Function584504 +Ref: Join Function-Footnote-1586275 +Node: Getlocaltime Function586475 +Node: Readfile Function590216 +Node: Data File Management592055 +Node: Filetrans Function592687 +Node: Rewind Function596756 +Node: File Checking598143 +Node: Empty Files599237 +Node: Ignoring Assigns601467 +Node: Getopt Function603021 +Ref: Getopt Function-Footnote-1614324 +Node: Passwd Functions614527 +Ref: Passwd Functions-Footnote-1623505 +Node: Group Functions623593 +Node: Walking Arrays631677 +Node: Sample Programs633813 +Node: Running Examples634487 +Node: Clones635215 +Node: Cut Program636439 +Node: Egrep Program646290 +Ref: Egrep Program-Footnote-1654063 +Node: Id Program654173 +Node: Split Program657789 +Ref: Split Program-Footnote-1661308 +Node: Tee Program661436 +Node: Uniq Program664239 +Node: Wc Program671668 +Ref: Wc Program-Footnote-1675934 +Ref: Wc Program-Footnote-2676134 +Node: Miscellaneous Programs676226 +Node: Dupword Program677414 +Node: Alarm Program679445 +Node: Translate Program684252 +Ref: Translate Program-Footnote-1688639 +Ref: Translate Program-Footnote-2688887 +Node: Labels Program689021 +Ref: Labels Program-Footnote-1692392 +Node: Word Sorting692476 +Node: History Sorting696360 +Node: Extract Program698199 +Ref: Extract Program-Footnote-1705702 +Node: Simple Sed705830 +Node: Igawk Program708892 +Ref: Igawk Program-Footnote-1724049 +Ref: Igawk Program-Footnote-2724250 +Node: Anagram Program724388 +Node: Signature Program727456 +Node: Advanced Features728556 +Node: Nondecimal Data730442 +Node: Array Sorting732025 +Node: Controlling Array Traversal732722 +Node: Array Sorting Functions741006 +Ref: Array Sorting Functions-Footnote-1744875 +Node: Two-way I/O745069 +Ref: Two-way I/O-Footnote-1750501 +Node: TCP/IP Networking750583 +Node: Profiling753427 +Node: Internationalization760930 +Node: I18N and L10N762355 +Node: Explaining gettext763041 +Ref: Explaining gettext-Footnote-1768109 +Ref: Explaining gettext-Footnote-2768293 +Node: Programmer i18n768458 +Node: Translator i18n772660 +Node: String Extraction773454 +Ref: String Extraction-Footnote-1774415 +Node: Printf Ordering774501 +Ref: Printf Ordering-Footnote-1777283 +Node: I18N Portability777347 +Ref: I18N Portability-Footnote-1779796 +Node: I18N Example779859 +Ref: I18N Example-Footnote-1782497 +Node: Gawk I18N782569 +Node: Debugger783190 +Node: Debugging784161 +Node: Debugging Concepts784594 +Node: Debugging Terms786450 +Node: Awk Debugging789047 +Node: Sample Debugging Session789939 +Node: Debugger Invocation790459 +Node: Finding The Bug791792 +Node: List of Debugger Commands798279 +Node: Breakpoint Control799613 +Node: Debugger Execution Control803277 +Node: Viewing And Changing Data806637 +Node: Execution Stack809993 +Node: Debugger Info811460 +Node: Miscellaneous Debugger Commands815442 +Node: Readline Support820618 +Node: Limitations821449 +Node: Arbitrary Precision Arithmetic823701 +Ref: Arbitrary Precision Arithmetic-Footnote-1825350 +Node: General Arithmetic825498 +Node: Floating Point Issues827218 +Node: String Conversion Precision828099 +Ref: String Conversion Precision-Footnote-1829804 +Node: Unexpected Results829913 +Node: POSIX Floating Point Problems832066 +Ref: POSIX Floating Point Problems-Footnote-1835891 +Node: Integer Programming835929 +Node: Floating-point Programming837668 +Ref: Floating-point Programming-Footnote-1843999 +Ref: Floating-point Programming-Footnote-2844269 +Node: Floating-point Representation844533 +Node: Floating-point Context845698 +Ref: table-ieee-formats846537 +Node: Rounding Mode847921 +Ref: table-rounding-modes848400 +Ref: Rounding Mode-Footnote-1851415 +Node: Gawk and MPFR851594 +Node: Arbitrary Precision Floats852849 +Ref: Arbitrary Precision Floats-Footnote-1855292 +Node: Setting Precision855608 +Ref: table-predefined-precision-strings856294 +Node: Setting Rounding Mode858439 +Ref: table-gawk-rounding-modes858843 +Node: Floating-point Constants860030 +Node: Changing Precision861459 +Ref: Changing Precision-Footnote-1862856 +Node: Exact Arithmetic863030 +Node: Arbitrary Precision Integers866168 +Ref: Arbitrary Precision Integers-Footnote-1869183 +Node: Dynamic Extensions869330 +Node: Extension Intro870788 +Node: Plugin License872053 +Node: Extension Mechanism Outline872738 +Ref: load-extension873155 +Ref: load-new-function874633 +Ref: call-new-function875628 +Node: Extension API Description877643 +Node: Extension API Functions Introduction878930 +Node: General Data Types883857 +Ref: General Data Types-Footnote-1889552 +Node: Requesting Values889851 +Ref: table-value-types-returned890588 +Node: Memory Allocation Functions891542 +Ref: Memory Allocation Functions-Footnote-1894288 +Node: Constructor Functions894384 +Node: Registration Functions896142 +Node: Extension Functions896827 +Node: Exit Callback Functions899129 +Node: Extension Version String900378 +Node: Input Parsers901028 +Node: Output Wrappers910785 +Node: Two-way processors915295 +Node: Printing Messages917503 +Ref: Printing Messages-Footnote-1918580 +Node: Updating `ERRNO'918732 +Node: Accessing Parameters919471 +Node: Symbol Table Access920701 +Node: Symbol table by name921215 +Node: Symbol table by cookie922964 +Ref: Symbol table by cookie-Footnote-1927096 +Node: Cached values927159 +Ref: Cached values-Footnote-1930649 +Node: Array Manipulation930740 +Ref: Array Manipulation-Footnote-1931838 +Node: Array Data Types931877 +Ref: Array Data Types-Footnote-1934580 +Node: Array Functions934672 +Node: Flattening Arrays938508 +Node: Creating Arrays945360 +Node: Extension API Variables950085 +Node: Extension Versioning950721 +Node: Extension API Informational Variables952622 +Node: Extension API Boilerplate953708 +Node: Finding Extensions957512 +Node: Extension Example958072 +Node: Internal File Description958802 +Node: Internal File Ops962893 +Ref: Internal File Ops-Footnote-1974402 +Node: Using Internal File Ops974542 +Ref: Using Internal File Ops-Footnote-1976895 +Node: Extension Samples977161 +Node: Extension Sample File Functions978685 +Node: Extension Sample Fnmatch987170 +Node: Extension Sample Fork988939 +Node: Extension Sample Inplace990152 +Node: Extension Sample Ord991930 +Node: Extension Sample Readdir992766 +Node: Extension Sample Revout994298 +Node: Extension Sample Rev2way994891 +Node: Extension Sample Read write array995581 +Node: Extension Sample Readfile997464 +Node: Extension Sample API Tests998282 +Node: Extension Sample Time998807 +Node: gawkextlib1000171 +Node: Language History1002952 +Node: V7/SVR3.11004545 +Node: SVR41006865 +Node: POSIX1008307 +Node: BTL1009693 +Node: POSIX/GNU1010427 +Node: Feature History1016026 +Node: Common Extensions1029002 +Node: Ranges and Locales1030314 +Ref: Ranges and Locales-Footnote-11034931 +Ref: Ranges and Locales-Footnote-21034958 +Ref: Ranges and Locales-Footnote-31035192 +Node: Contributors1035413 +Node: Installation1040558 +Node: Gawk Distribution1041452 +Node: Getting1041936 +Node: Extracting1042762 +Node: Distribution contents1044454 +Node: Unix Installation1050159 +Node: Quick Installation1050776 +Node: Additional Configuration Options1053222 +Node: Configuration Philosophy1054958 +Node: Non-Unix Installation1057312 +Node: PC Installation1057770 +Node: PC Binary Installation1059069 +Node: PC Compiling1060917 +Node: PC Testing1063861 +Node: PC Using1065037 +Node: Cygwin1069205 +Node: MSYS1070014 +Node: VMS Installation1070528 +Node: VMS Compilation1071292 +Ref: VMS Compilation-Footnote-11072544 +Node: VMS Dynamic Extensions1072602 +Node: VMS Installation Details1073975 +Node: VMS Running1076226 +Node: VMS GNV1079060 +Node: VMS Old Gawk1079783 +Node: Bugs1080253 +Node: Other Versions1084171 +Node: Notes1090255 +Node: Compatibility Mode1091055 +Node: Additions1091838 +Node: Accessing The Source1092765 +Node: Adding Code1094205 +Node: New Ports1100250 +Node: Derived Files1104385 +Ref: Derived Files-Footnote-11109706 +Ref: Derived Files-Footnote-21109740 +Ref: Derived Files-Footnote-31110340 +Node: Future Extensions1110438 +Node: Implementation Limitations1111021 +Node: Extension Design1112273 +Node: Old Extension Problems1113427 +Ref: Old Extension Problems-Footnote-11114935 +Node: Extension New Mechanism Goals1114992 +Ref: Extension New Mechanism Goals-Footnote-11118357 +Node: Extension Other Design Decisions1118543 +Node: Extension Future Growth1120649 +Node: Old Extension Mechanism1121485 +Node: Basic Concepts1123225 +Node: Basic High Level1123906 +Ref: figure-general-flow1124177 +Ref: figure-process-flow1124776 +Ref: Basic High Level-Footnote-11128005 +Node: Basic Data Typing1128190 +Node: Glossary1131545 +Node: Copying1157007 +Node: GNU Free Documentation License1194564 +Node: Index1219701 End Tag Table diff --git a/doc/gawk.texi b/doc/gawk.texi index 09beef82..b9bf2170 100644 --- a/doc/gawk.texi +++ b/doc/gawk.texi @@ -13708,10 +13708,18 @@ 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 @@ -36024,9 +36032,10 @@ 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: @@ -36051,7 +36060,8 @@ 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 6d7c5055..6054ed40 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 @@ -35165,9 +35173,10 @@ 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: @@ -35192,7 +35201,8 @@ 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 |