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-rw-r--r--doc/ChangeLog7
-rw-r--r--doc/gawk.18
-rw-r--r--doc/gawk.info780
-rw-r--r--doc/gawk.texi26
-rw-r--r--doc/gawktexi.in26
5 files changed, 443 insertions, 404 deletions
diff --git a/doc/ChangeLog b/doc/ChangeLog
index ba4aa094..167bb9fe 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -189,7 +189,7 @@
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>
@@ -263,6 +263,11 @@
* gawktexi.in (FN, FFN, DF,DDF, PVERSION, CTL): Remove macros.
They have no alternate versions and are just in the way.
+2013-08-15 Arnold D. Robbins <arnold@skeeve.com>
+
+ * gawk.1: Document that ENVIRON updates affect the environment.
+ * gawktexi.in: Ditto.
+
2013-06-27 Arnold D. Robbins <arnold@skeeve.com>
* texinfo.tex: Update from Karl, fixes a formating problem.
diff --git a/doc/gawk.1 b/doc/gawk.1
index c7646557..e3275e87 100644
--- a/doc/gawk.1
+++ b/doc/gawk.1
@@ -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 d725b73e..4c824f32 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -9808,10 +9808,18 @@ 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
@@ -30986,9 +30994,9 @@ 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)
@@ -31172,12 +31180,12 @@ 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)
@@ -31200,7 +31208,7 @@ 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)
@@ -31210,7 +31218,7 @@ 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.
@@ -31218,7 +31226,7 @@ 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.
@@ -31259,8 +31267,8 @@ 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)
@@ -31315,13 +31323,13 @@ 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)
@@ -31375,7 +31383,7 @@ 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)
@@ -31454,7 +31462,7 @@ 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)
@@ -31524,9 +31532,9 @@ 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.
@@ -31576,7 +31584,7 @@ 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)
@@ -31626,7 +31634,7 @@ 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)
@@ -31647,7 +31655,7 @@ 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)
@@ -31664,7 +31672,7 @@ 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.
@@ -31695,7 +31703,7 @@ 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.
@@ -31703,14 +31711,14 @@ 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)
@@ -31797,7 +31805,7 @@ 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.
@@ -32092,7 +32100,7 @@ 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.
@@ -32104,7 +32112,7 @@ 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)
@@ -32158,7 +32166,7 @@ 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.
@@ -32167,9 +32175,9 @@ 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.
@@ -32284,7 +32292,7 @@ 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)
@@ -32449,24 +32457,24 @@ 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.
@@ -32626,7 +32634,7 @@ 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)
@@ -32655,9 +32663,9 @@ 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)
@@ -32677,7 +32685,7 @@ 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)
@@ -32765,7 +32773,7 @@ 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.
@@ -32927,9 +32935,9 @@ 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)
@@ -33107,10 +33115,10 @@ 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)
@@ -33389,342 +33397,342 @@ Node: Built-in Variables409253
Node: User-modified410349
Ref: User-modified-Footnote-1418034
Node: Auto-set418096
-Ref: Auto-set-Footnote-1430661
-Ref: Auto-set-Footnote-2430866
-Node: ARGC and ARGV430922
-Node: Arrays434776
-Node: Array Basics436274
-Node: Array Intro437100
-Ref: figure-array-elements439073
-Node: Reference to Elements441480
-Node: Assigning Elements443753
-Node: Array Example444244
-Node: Scanning an Array445976
-Node: Controlling Scanning448991
-Ref: Controlling Scanning-Footnote-1454164
-Node: Delete454480
-Ref: Delete-Footnote-1457245
-Node: Numeric Array Subscripts457302
-Node: Uninitialized Subscripts459485
-Node: Multidimensional461110
-Node: Multiscanning464203
-Node: Arrays of Arrays465792
-Node: Functions470432
-Node: Built-in471251
-Node: Calling Built-in472329
-Node: Numeric Functions474317
-Ref: Numeric Functions-Footnote-1478151
-Ref: Numeric Functions-Footnote-2478508
-Ref: Numeric Functions-Footnote-3478556
-Node: String Functions478825
-Ref: String Functions-Footnote-1501836
-Ref: String Functions-Footnote-2501965
-Ref: String Functions-Footnote-3502213
-Node: Gory Details502300
-Ref: table-sub-escapes503969
-Ref: table-sub-posix-92505323
-Ref: table-sub-proposed506674
-Ref: table-posix-sub508028
-Ref: table-gensub-escapes509573
-Ref: Gory Details-Footnote-1510749
-Ref: Gory Details-Footnote-2510800
-Node: I/O Functions510951
-Ref: I/O Functions-Footnote-1518074
-Node: Time Functions518221
-Ref: Time Functions-Footnote-1528685
-Ref: Time Functions-Footnote-2528753
-Ref: Time Functions-Footnote-3528911
-Ref: Time Functions-Footnote-4529022
-Ref: Time Functions-Footnote-5529134
-Ref: Time Functions-Footnote-6529361
-Node: Bitwise Functions529627
-Ref: table-bitwise-ops530189
-Ref: Bitwise Functions-Footnote-1534434
-Node: Type Functions534618
-Node: I18N Functions535760
-Node: User-defined537405
-Node: Definition Syntax538209
-Ref: Definition Syntax-Footnote-1543124
-Node: Function Example543193
-Ref: Function Example-Footnote-1545837
-Node: Function Caveats545859
-Node: Calling A Function546377
-Node: Variable Scope547332
-Node: Pass By Value/Reference550320
-Node: Return Statement553828
-Node: Dynamic Typing556810
-Node: Indirect Calls557739
-Node: Library Functions567426
-Ref: Library Functions-Footnote-1570939
-Ref: Library Functions-Footnote-2571082
-Node: Library Names571253
-Ref: Library Names-Footnote-1574726
-Ref: Library Names-Footnote-2574946
-Node: General Functions575032
-Node: Strtonum Function576060
-Node: Assert Function578990
-Node: Round Function582316
-Node: Cliff Random Function583857
-Node: Ordinal Functions584873
-Ref: Ordinal Functions-Footnote-1587950
-Ref: Ordinal Functions-Footnote-2588202
-Node: Join Function588413
-Ref: Join Function-Footnote-1590184
-Node: Getlocaltime Function590384
-Node: Readfile Function594125
-Node: Data File Management595964
-Node: Filetrans Function596596
-Node: Rewind Function600665
-Node: File Checking602052
-Node: Empty Files603146
-Node: Ignoring Assigns605376
-Node: Getopt Function606930
-Ref: Getopt Function-Footnote-1618233
-Node: Passwd Functions618436
-Ref: Passwd Functions-Footnote-1627414
-Node: Group Functions627502
-Node: Walking Arrays635586
-Node: Sample Programs637722
-Node: Running Examples638396
-Node: Clones639124
-Node: Cut Program640348
-Node: Egrep Program650199
-Ref: Egrep Program-Footnote-1657972
-Node: Id Program658082
-Node: Split Program661731
-Ref: Split Program-Footnote-1665250
-Node: Tee Program665378
-Node: Uniq Program668181
-Node: Wc Program675610
-Ref: Wc Program-Footnote-1679876
-Ref: Wc Program-Footnote-2680076
-Node: Miscellaneous Programs680168
-Node: Dupword Program681356
-Node: Alarm Program683387
-Node: Translate Program688194
-Ref: Translate Program-Footnote-1692581
-Ref: Translate Program-Footnote-2692829
-Node: Labels Program692963
-Ref: Labels Program-Footnote-1696334
-Node: Word Sorting696418
-Node: History Sorting700302
-Node: Extract Program702141
-Ref: Extract Program-Footnote-1709644
-Node: Simple Sed709772
-Node: Igawk Program712834
-Ref: Igawk Program-Footnote-1728005
-Ref: Igawk Program-Footnote-2728206
-Node: Anagram Program728344
-Node: Signature Program731412
-Node: Advanced Features732512
-Node: Nondecimal Data734398
-Node: Array Sorting735981
-Node: Controlling Array Traversal736678
-Node: Array Sorting Functions744962
-Ref: Array Sorting Functions-Footnote-1748831
-Node: Two-way I/O749025
-Ref: Two-way I/O-Footnote-1754457
-Node: TCP/IP Networking754539
-Node: Profiling757383
-Node: Internationalization764886
-Node: I18N and L10N766311
-Node: Explaining gettext766997
-Ref: Explaining gettext-Footnote-1772065
-Ref: Explaining gettext-Footnote-2772249
-Node: Programmer i18n772414
-Node: Translator i18n776641
-Node: String Extraction777435
-Ref: String Extraction-Footnote-1778396
-Node: Printf Ordering778482
-Ref: Printf Ordering-Footnote-1781264
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-Node: Flattening Arrays942884
-Node: Creating Arrays949736
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-Node: Extension Sample Fork993311
-Node: Extension Sample Inplace994524
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-Node: Extension Sample Readdir997138
-Node: Extension Sample Revout998670
-Node: Extension Sample Rev2way999263
-Node: Extension Sample Read write array999953
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-Node: Extension Sample API Tests1002936
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-Node: gawkextlib1004825
-Node: Language History1007606
-Node: V7/SVR3.11009199
-Node: SVR41011519
-Node: POSIX1012961
-Node: BTL1014347
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-Node: Feature History1020680
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-Node: Ranges and Locales1034968
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-Ref: Ranges and Locales-Footnote-21039612
-Ref: Ranges and Locales-Footnote-31039846
-Node: Contributors1040067
-Node: Installation1045448
-Node: Gawk Distribution1046342
-Node: Getting1046826
-Node: Extracting1047652
-Node: Distribution contents1049344
-Node: Unix Installation1055065
-Node: Quick Installation1055682
-Node: Additional Configuration Options1058128
-Node: Configuration Philosophy1059864
-Node: Non-Unix Installation1062218
-Node: PC Installation1062676
-Node: PC Binary Installation1063987
-Node: PC Compiling1065835
-Node: PC Testing1068795
-Node: PC Using1069971
-Node: Cygwin1074139
-Node: MSYS1074948
-Node: VMS Installation1075462
-Node: VMS Compilation1076258
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-Node: VMS Dynamic Extensions1077568
-Node: VMS Installation Details1078941
-Node: VMS Running1081192
-Node: VMS GNV1084026
-Node: VMS Old Gawk1084749
-Node: Bugs1085219
-Node: Other Versions1089137
-Node: Notes1095221
-Node: Compatibility Mode1096021
-Node: Additions1096804
-Node: Accessing The Source1097731
-Node: Adding Code1099171
-Node: New Ports1105216
-Node: Derived Files1109351
-Ref: Derived Files-Footnote-11114672
-Ref: Derived Files-Footnote-21114706
-Ref: Derived Files-Footnote-31115306
-Node: Future Extensions1115404
-Node: Implementation Limitations1115987
-Node: Extension Design1117235
-Node: Old Extension Problems1118389
-Ref: Old Extension Problems-Footnote-11119897
-Node: Extension New Mechanism Goals1119954
-Ref: Extension New Mechanism Goals-Footnote-11123319
-Node: Extension Other Design Decisions1123505
-Node: Extension Future Growth1125611
-Node: Old Extension Mechanism1126447
-Node: Basic Concepts1128187
-Node: Basic High Level1128868
-Ref: figure-general-flow1129140
-Ref: figure-process-flow1129739
-Ref: Basic High Level-Footnote-11132968
-Node: Basic Data Typing1133153
-Node: Glossary1136508
-Node: Copying1161739
-Node: GNU Free Documentation License1199295
-Node: Index1224431
+Ref: Auto-set-Footnote-1430998
+Ref: Auto-set-Footnote-2431203
+Node: ARGC and ARGV431259
+Node: Arrays435113
+Node: Array Basics436611
+Node: Array Intro437437
+Ref: figure-array-elements439410
+Node: Reference to Elements441817
+Node: Assigning Elements444090
+Node: Array Example444581
+Node: Scanning an Array446313
+Node: Controlling Scanning449328
+Ref: Controlling Scanning-Footnote-1454501
+Node: Delete454817
+Ref: Delete-Footnote-1457582
+Node: Numeric Array Subscripts457639
+Node: Uninitialized Subscripts459822
+Node: Multidimensional461447
+Node: Multiscanning464540
+Node: Arrays of Arrays466129
+Node: Functions470769
+Node: Built-in471588
+Node: Calling Built-in472666
+Node: Numeric Functions474654
+Ref: Numeric Functions-Footnote-1478488
+Ref: Numeric Functions-Footnote-2478845
+Ref: Numeric Functions-Footnote-3478893
+Node: String Functions479162
+Ref: String Functions-Footnote-1502173
+Ref: String Functions-Footnote-2502302
+Ref: String Functions-Footnote-3502550
+Node: Gory Details502637
+Ref: table-sub-escapes504306
+Ref: table-sub-posix-92505660
+Ref: table-sub-proposed507011
+Ref: table-posix-sub508365
+Ref: table-gensub-escapes509910
+Ref: Gory Details-Footnote-1511086
+Ref: Gory Details-Footnote-2511137
+Node: I/O Functions511288
+Ref: I/O Functions-Footnote-1518411
+Node: Time Functions518558
+Ref: Time Functions-Footnote-1529022
+Ref: Time Functions-Footnote-2529090
+Ref: Time Functions-Footnote-3529248
+Ref: Time Functions-Footnote-4529359
+Ref: Time Functions-Footnote-5529471
+Ref: Time Functions-Footnote-6529698
+Node: Bitwise Functions529964
+Ref: table-bitwise-ops530526
+Ref: Bitwise Functions-Footnote-1534771
+Node: Type Functions534955
+Node: I18N Functions536097
+Node: User-defined537742
+Node: Definition Syntax538546
+Ref: Definition Syntax-Footnote-1543461
+Node: Function Example543530
+Ref: Function Example-Footnote-1546174
+Node: Function Caveats546196
+Node: Calling A Function546714
+Node: Variable Scope547669
+Node: Pass By Value/Reference550657
+Node: Return Statement554165
+Node: Dynamic Typing557147
+Node: Indirect Calls558076
+Node: Library Functions567763
+Ref: Library Functions-Footnote-1571276
+Ref: Library Functions-Footnote-2571419
+Node: Library Names571590
+Ref: Library Names-Footnote-1575063
+Ref: Library Names-Footnote-2575283
+Node: General Functions575369
+Node: Strtonum Function576397
+Node: Assert Function579327
+Node: Round Function582653
+Node: Cliff Random Function584194
+Node: Ordinal Functions585210
+Ref: Ordinal Functions-Footnote-1588287
+Ref: Ordinal Functions-Footnote-2588539
+Node: Join Function588750
+Ref: Join Function-Footnote-1590521
+Node: Getlocaltime Function590721
+Node: Readfile Function594462
+Node: Data File Management596301
+Node: Filetrans Function596933
+Node: Rewind Function601002
+Node: File Checking602389
+Node: Empty Files603483
+Node: Ignoring Assigns605713
+Node: Getopt Function607267
+Ref: Getopt Function-Footnote-1618570
+Node: Passwd Functions618773
+Ref: Passwd Functions-Footnote-1627751
+Node: Group Functions627839
+Node: Walking Arrays635923
+Node: Sample Programs638059
+Node: Running Examples638733
+Node: Clones639461
+Node: Cut Program640685
+Node: Egrep Program650536
+Ref: Egrep Program-Footnote-1658309
+Node: Id Program658419
+Node: Split Program662068
+Ref: Split Program-Footnote-1665587
+Node: Tee Program665715
+Node: Uniq Program668518
+Node: Wc Program675947
+Ref: Wc Program-Footnote-1680213
+Ref: Wc Program-Footnote-2680413
+Node: Miscellaneous Programs680505
+Node: Dupword Program681693
+Node: Alarm Program683724
+Node: Translate Program688531
+Ref: Translate Program-Footnote-1692918
+Ref: Translate Program-Footnote-2693166
+Node: Labels Program693300
+Ref: Labels Program-Footnote-1696671
+Node: Word Sorting696755
+Node: History Sorting700639
+Node: Extract Program702478
+Ref: Extract Program-Footnote-1709981
+Node: Simple Sed710109
+Node: Igawk Program713171
+Ref: Igawk Program-Footnote-1728342
+Ref: Igawk Program-Footnote-2728543
+Node: Anagram Program728681
+Node: Signature Program731749
+Node: Advanced Features732849
+Node: Nondecimal Data734735
+Node: Array Sorting736318
+Node: Controlling Array Traversal737015
+Node: Array Sorting Functions745299
+Ref: Array Sorting Functions-Footnote-1749168
+Node: Two-way I/O749362
+Ref: Two-way I/O-Footnote-1754794
+Node: TCP/IP Networking754876
+Node: Profiling757720
+Node: Internationalization765223
+Node: I18N and L10N766648
+Node: Explaining gettext767334
+Ref: Explaining gettext-Footnote-1772402
+Ref: Explaining gettext-Footnote-2772586
+Node: Programmer i18n772751
+Node: Translator i18n776978
+Node: String Extraction777772
+Ref: String Extraction-Footnote-1778733
+Node: Printf Ordering778819
+Ref: Printf Ordering-Footnote-1781601
+Node: I18N Portability781665
+Ref: I18N Portability-Footnote-1784114
+Node: I18N Example784177
+Ref: I18N Example-Footnote-1786815
+Node: Gawk I18N786887
+Node: Debugger787508
+Node: Debugging788479
+Node: Debugging Concepts788912
+Node: Debugging Terms790768
+Node: Awk Debugging793365
+Node: Sample Debugging Session794257
+Node: Debugger Invocation794777
+Node: Finding The Bug796110
+Node: List of Debugger Commands802597
+Node: Breakpoint Control803931
+Node: Debugger Execution Control807595
+Node: Viewing And Changing Data810955
+Node: Execution Stack814311
+Node: Debugger Info815778
+Node: Miscellaneous Debugger Commands819772
+Node: Readline Support824950
+Node: Limitations825781
+Node: Arbitrary Precision Arithmetic828033
+Ref: Arbitrary Precision Arithmetic-Footnote-1829682
+Node: General Arithmetic829830
+Node: Floating Point Issues831550
+Node: String Conversion Precision832431
+Ref: String Conversion Precision-Footnote-1834136
+Node: Unexpected Results834245
+Node: POSIX Floating Point Problems836398
+Ref: POSIX Floating Point Problems-Footnote-1840223
+Node: Integer Programming840261
+Node: Floating-point Programming842000
+Ref: Floating-point Programming-Footnote-1848331
+Ref: Floating-point Programming-Footnote-2848601
+Node: Floating-point Representation848865
+Node: Floating-point Context850030
+Ref: table-ieee-formats850869
+Node: Rounding Mode852253
+Ref: table-rounding-modes852732
+Ref: Rounding Mode-Footnote-1855747
+Node: Gawk and MPFR855926
+Node: Arbitrary Precision Floats857335
+Ref: Arbitrary Precision Floats-Footnote-1859778
+Node: Setting Precision860094
+Ref: table-predefined-precision-strings860780
+Node: Setting Rounding Mode862925
+Ref: table-gawk-rounding-modes863329
+Node: Floating-point Constants864516
+Node: Changing Precision865945
+Ref: Changing Precision-Footnote-1867342
+Node: Exact Arithmetic867516
+Node: Arbitrary Precision Integers870654
+Ref: Arbitrary Precision Integers-Footnote-1873669
+Node: Dynamic Extensions873816
+Node: Extension Intro875274
+Node: Plugin License876539
+Node: Extension Mechanism Outline877224
+Ref: load-extension877641
+Ref: load-new-function879119
+Ref: call-new-function880114
+Node: Extension API Description882129
+Node: Extension API Functions Introduction883416
+Node: General Data Types888343
+Ref: General Data Types-Footnote-1894038
+Node: Requesting Values894337
+Ref: table-value-types-returned895074
+Node: Memory Allocation Functions896028
+Ref: Memory Allocation Functions-Footnote-1898774
+Node: Constructor Functions898870
+Node: Registration Functions900628
+Node: Extension Functions901313
+Node: Exit Callback Functions903615
+Node: Extension Version String904864
+Node: Input Parsers905514
+Node: Output Wrappers915271
+Node: Two-way processors919781
+Node: Printing Messages921989
+Ref: Printing Messages-Footnote-1923066
+Node: Updating `ERRNO'923218
+Node: Accessing Parameters923957
+Node: Symbol Table Access925187
+Node: Symbol table by name925701
+Node: Symbol table by cookie927677
+Ref: Symbol table by cookie-Footnote-1931809
+Node: Cached values931872
+Ref: Cached values-Footnote-1935362
+Node: Array Manipulation935453
+Ref: Array Manipulation-Footnote-1936551
+Node: Array Data Types936590
+Ref: Array Data Types-Footnote-1939293
+Node: Array Functions939385
+Node: Flattening Arrays943221
+Node: Creating Arrays950073
+Node: Extension API Variables954798
+Node: Extension Versioning955434
+Node: Extension API Informational Variables957335
+Node: Extension API Boilerplate958421
+Node: Finding Extensions962225
+Node: Extension Example962785
+Node: Internal File Description963515
+Node: Internal File Ops967606
+Ref: Internal File Ops-Footnote-1979115
+Node: Using Internal File Ops979255
+Ref: Using Internal File Ops-Footnote-1981602
+Node: Extension Samples981868
+Node: Extension Sample File Functions983392
+Node: Extension Sample Fnmatch991879
+Node: Extension Sample Fork993648
+Node: Extension Sample Inplace994861
+Node: Extension Sample Ord996639
+Node: Extension Sample Readdir997475
+Node: Extension Sample Revout999007
+Node: Extension Sample Rev2way999600
+Node: Extension Sample Read write array1000290
+Node: Extension Sample Readfile1002173
+Node: Extension Sample API Tests1003273
+Node: Extension Sample Time1003798
+Node: gawkextlib1005162
+Node: Language History1007943
+Node: V7/SVR3.11009536
+Node: SVR41011856
+Node: POSIX1013298
+Node: BTL1014684
+Node: POSIX/GNU1015418
+Node: Feature History1021017
+Node: Common Extensions1033993
+Node: Ranges and Locales1035305
+Ref: Ranges and Locales-Footnote-11039922
+Ref: Ranges and Locales-Footnote-21039949
+Ref: Ranges and Locales-Footnote-31040183
+Node: Contributors1040404
+Node: Installation1045785
+Node: Gawk Distribution1046679
+Node: Getting1047163
+Node: Extracting1047989
+Node: Distribution contents1049681
+Node: Unix Installation1055402
+Node: Quick Installation1056019
+Node: Additional Configuration Options1058465
+Node: Configuration Philosophy1060201
+Node: Non-Unix Installation1062555
+Node: PC Installation1063013
+Node: PC Binary Installation1064324
+Node: PC Compiling1066172
+Node: PC Testing1069132
+Node: PC Using1070308
+Node: Cygwin1074476
+Node: MSYS1075285
+Node: VMS Installation1075799
+Node: VMS Compilation1076595
+Ref: VMS Compilation-Footnote-11077847
+Node: VMS Dynamic Extensions1077905
+Node: VMS Installation Details1079278
+Node: VMS Running1081529
+Node: VMS GNV1084363
+Node: VMS Old Gawk1085086
+Node: Bugs1085556
+Node: Other Versions1089474
+Node: Notes1095558
+Node: Compatibility Mode1096358
+Node: Additions1097141
+Node: Accessing The Source1098068
+Node: Adding Code1099508
+Node: New Ports1105553
+Node: Derived Files1109688
+Ref: Derived Files-Footnote-11115009
+Ref: Derived Files-Footnote-21115043
+Ref: Derived Files-Footnote-31115643
+Node: Future Extensions1115741
+Node: Implementation Limitations1116324
+Node: Extension Design1117572
+Node: Old Extension Problems1118726
+Ref: Old Extension Problems-Footnote-11120234
+Node: Extension New Mechanism Goals1120291
+Ref: Extension New Mechanism Goals-Footnote-11123656
+Node: Extension Other Design Decisions1123842
+Node: Extension Future Growth1125948
+Node: Old Extension Mechanism1126784
+Node: Basic Concepts1128524
+Node: Basic High Level1129205
+Ref: figure-general-flow1129477
+Ref: figure-process-flow1130076
+Ref: Basic High Level-Footnote-11133305
+Node: Basic Data Typing1133490
+Node: Glossary1136845
+Node: Copying1162076
+Node: GNU Free Documentation License1199632
+Node: Index1224768

End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index 470b2822..9422f43b 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -14084,10 +14084,18 @@ 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
@@ -37007,9 +37015,10 @@ 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:
@@ -37037,7 +37046,8 @@ 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 af323c1b..2edeacc8 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -13464,10 +13464,18 @@ 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
@@ -36151,9 +36159,10 @@ 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:
@@ -36181,7 +36190,8 @@ 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
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-12 16:33:34 +0000