aboutsummaryrefslogtreecommitdiffstats
path: root/doc
diff options
context:
space:
mode:
Diffstat (limited to 'doc')
-rw-r--r--doc/ChangeLog7
-rw-r--r--doc/gawk.18
-rw-r--r--doc/gawk.info804
-rw-r--r--doc/gawk.texi26
-rw-r--r--doc/gawktexi.in26
5 files changed, 455 insertions, 416 deletions
diff --git a/doc/ChangeLog b/doc/ChangeLog
index d047e041..79e49f7e 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -266,7 +266,7 @@
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>
@@ -340,6 +340,11 @@
* 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 2e30ad95..1ed56125 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -10078,10 +10078,18 @@ 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
@@ -31609,9 +31617,9 @@ 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)
@@ -31795,12 +31803,12 @@ 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)
@@ -31823,7 +31831,7 @@ 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)
@@ -31833,7 +31841,7 @@ 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.
@@ -31841,7 +31849,7 @@ 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.
@@ -31882,8 +31890,8 @@ 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)
@@ -31939,13 +31947,13 @@ 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)
@@ -31999,7 +32007,7 @@ 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)
@@ -32078,7 +32086,7 @@ 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)
@@ -32148,9 +32156,9 @@ 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.
@@ -32200,7 +32208,7 @@ Index
* FSF (Free Software Foundation): Manual History. (line 6)
* fts() extension function: Extension Sample File Functions.
(line 61)
-* 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)
@@ -32250,7 +32258,7 @@ 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)
@@ -32271,7 +32279,7 @@ 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)
@@ -32288,7 +32296,7 @@ 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.
@@ -32319,7 +32327,7 @@ Index
* gawk, OS/2 version of: PC Using. (line 16)
* gawk, PROCINFO array in <1>: Two-way I/O. (line 117)
* 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.
@@ -32327,14 +32335,14 @@ 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)
@@ -32421,7 +32429,7 @@ 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.
@@ -32718,7 +32726,7 @@ 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)
* McIlroy, Doug: Glossary. (line 149)
* McPhee, Patrick: Contributors. (line 100)
* message object files: Explaining gettext. (line 42)
@@ -32731,7 +32739,7 @@ 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 104)
@@ -32785,7 +32793,7 @@ 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.
@@ -32794,9 +32802,9 @@ 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.
@@ -32911,7 +32919,7 @@ Index
* p debugger command (alias for print): Viewing And Changing Data.
(line 36)
* Papadopoulos, Panos: Contributors. (line 129)
-* 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)
@@ -33076,24 +33084,24 @@ 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 117)
* 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.
@@ -33253,7 +33261,7 @@ Index
* right shift: Bitwise Functions. (line 52)
* right shift, bitwise: Bitwise Functions. (line 32)
* Ritchie, Dennis: Basic Data Typing. (line 54)
-* 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)
@@ -33282,9 +33290,9 @@ 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)
@@ -33304,7 +33312,7 @@ Index
* scanning arrays: Scanning an Array. (line 6)
* scanning multidimensional arrays: Multiscanning. (line 11)
* Schorr, Andrew <1>: Contributors. (line 134)
-* 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)
@@ -33392,7 +33400,7 @@ 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.
@@ -33554,9 +33562,9 @@ 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)
@@ -33734,10 +33742,10 @@ 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)
@@ -34022,354 +34030,354 @@ Node: Built-in Variables420634
Node: User-modified421761
Ref: User-modified-Footnote-1429446
Node: Auto-set429508
-Ref: Auto-set-Footnote-1442073
-Ref: Auto-set-Footnote-2442278
-Node: ARGC and ARGV442334
-Node: Pattern Action Summary446188
-Node: Arrays448411
-Node: Array Basics449960
-Node: Array Intro450786
-Ref: figure-array-elements452759
-Node: Reference to Elements455166
-Node: Assigning Elements457439
-Node: Array Example457930
-Node: Scanning an Array459662
-Node: Controlling Scanning462677
-Ref: Controlling Scanning-Footnote-1467850
-Node: Delete468166
-Ref: Delete-Footnote-1470931
-Node: Numeric Array Subscripts470988
-Node: Uninitialized Subscripts473171
-Node: Multidimensional474796
-Node: Multiscanning477889
-Node: Arrays of Arrays479478
-Node: Arrays Summary484141
-Node: Functions486246
-Node: Built-in487119
-Node: Calling Built-in488197
-Node: Numeric Functions490185
-Ref: Numeric Functions-Footnote-1494019
-Ref: Numeric Functions-Footnote-2494376
-Ref: Numeric Functions-Footnote-3494424
-Node: String Functions494693
-Ref: String Functions-Footnote-1517704
-Ref: String Functions-Footnote-2517833
-Ref: String Functions-Footnote-3518081
-Node: Gory Details518168
-Ref: table-sub-escapes519837
-Ref: table-sub-posix-92521191
-Ref: table-sub-proposed522542
-Ref: table-posix-sub523896
-Ref: table-gensub-escapes525441
-Ref: Gory Details-Footnote-1526617
-Ref: Gory Details-Footnote-2526668
-Node: I/O Functions526819
-Ref: I/O Functions-Footnote-1533942
-Node: Time Functions534089
-Ref: Time Functions-Footnote-1544553
-Ref: Time Functions-Footnote-2544621
-Ref: Time Functions-Footnote-3544779
-Ref: Time Functions-Footnote-4544890
-Ref: Time Functions-Footnote-5545002
-Ref: Time Functions-Footnote-6545229
-Node: Bitwise Functions545495
-Ref: table-bitwise-ops546057
-Ref: Bitwise Functions-Footnote-1550302
-Node: Type Functions550486
-Node: I18N Functions551628
-Node: User-defined553273
-Node: Definition Syntax554077
-Ref: Definition Syntax-Footnote-1559002
-Node: Function Example559071
-Ref: Function Example-Footnote-1561715
-Node: Function Caveats561737
-Node: Calling A Function562255
-Node: Variable Scope563210
-Node: Pass By Value/Reference566198
-Node: Return Statement569706
-Node: Dynamic Typing572690
-Node: Indirect Calls573619
-Node: Functions Summary583332
-Node: Library Functions585871
-Ref: Library Functions-Footnote-1589446
-Ref: Library Functions-Footnote-2589589
-Node: Library Names589760
-Ref: Library Names-Footnote-1593233
-Ref: Library Names-Footnote-2593453
-Node: General Functions593539
-Node: Strtonum Function594567
-Node: Assert Function597497
-Node: Round Function600823
-Node: Cliff Random Function602364
-Node: Ordinal Functions603380
-Ref: Ordinal Functions-Footnote-1606457
-Ref: Ordinal Functions-Footnote-2606709
-Node: Join Function606920
-Ref: Join Function-Footnote-1608691
-Node: Getlocaltime Function608891
-Node: Readfile Function612627
-Node: Data File Management614466
-Node: Filetrans Function615098
-Node: Rewind Function619167
-Node: File Checking620554
-Ref: File Checking-Footnote-1621686
-Node: Empty Files621887
-Node: Ignoring Assigns624117
-Node: Getopt Function625671
-Ref: Getopt Function-Footnote-1636974
-Node: Passwd Functions637177
-Ref: Passwd Functions-Footnote-1646156
-Node: Group Functions646244
-Ref: Group Functions-Footnote-1654186
-Node: Walking Arrays654399
-Node: Library Functions Summary656569
-Node: Sample Programs657931
-Node: Running Examples658658
-Node: Clones659386
-Node: Cut Program660610
-Node: Egrep Program670478
-Ref: Egrep Program-Footnote-1678449
-Node: Id Program678559
-Node: Split Program682223
-Ref: Split Program-Footnote-1685761
-Node: Tee Program685889
-Node: Uniq Program688696
-Node: Wc Program696126
-Ref: Wc Program-Footnote-1700394
-Ref: Wc Program-Footnote-2700594
-Node: Miscellaneous Programs700686
-Node: Dupword Program701899
-Node: Alarm Program703930
-Node: Translate Program708744
-Ref: Translate Program-Footnote-1713135
-Ref: Translate Program-Footnote-2713405
-Node: Labels Program713539
-Ref: Labels Program-Footnote-1716910
-Node: Word Sorting716994
-Node: History Sorting721037
-Node: Extract Program722873
-Ref: Extract Program-Footnote-1730448
-Node: Simple Sed730577
-Node: Igawk Program733639
-Ref: Igawk Program-Footnote-1748815
-Ref: Igawk Program-Footnote-2749016
-Node: Anagram Program749154
-Node: Signature Program752222
-Node: Programs Summary753469
-Node: Advanced Features754657
-Node: Nondecimal Data756605
-Node: Array Sorting758182
-Node: Controlling Array Traversal758879
-Node: Array Sorting Functions767159
-Ref: Array Sorting Functions-Footnote-1771066
-Node: Two-way I/O771260
-Ref: Two-way I/O-Footnote-1776776
-Node: TCP/IP Networking776858
-Node: Profiling779702
-Node: Advanced Features Summary787244
-Node: Internationalization789108
-Node: I18N and L10N790588
-Node: Explaining gettext791274
-Ref: Explaining gettext-Footnote-1796414
-Ref: Explaining gettext-Footnote-2796598
-Node: Programmer i18n796763
-Node: Translator i18n800988
-Node: String Extraction801782
-Ref: String Extraction-Footnote-1802743
-Node: Printf Ordering802829
-Ref: Printf Ordering-Footnote-1805611
-Node: I18N Portability805675
-Ref: I18N Portability-Footnote-1808124
-Node: I18N Example808187
-Ref: I18N Example-Footnote-1810909
-Node: Gawk I18N810981
-Node: I18N Summary811619
-Node: Debugger812958
-Node: Debugging813980
-Node: Debugging Concepts814421
-Node: Debugging Terms816277
-Node: Awk Debugging818874
-Node: Sample Debugging Session819766
-Node: Debugger Invocation820286
-Node: Finding The Bug821619
-Node: List of Debugger Commands828101
-Node: Breakpoint Control829433
-Node: Debugger Execution Control833097
-Node: Viewing And Changing Data836457
-Node: Execution Stack839815
-Node: Debugger Info841328
-Node: Miscellaneous Debugger Commands845322
-Node: Readline Support850506
-Node: Limitations851398
-Node: Debugging Summary853672
-Node: Arbitrary Precision Arithmetic854836
-Ref: Arbitrary Precision Arithmetic-Footnote-1856485
-Node: General Arithmetic856633
-Node: Floating Point Issues858353
-Node: String Conversion Precision859234
-Ref: String Conversion Precision-Footnote-1860939
-Node: Unexpected Results861048
-Node: POSIX Floating Point Problems863201
-Ref: POSIX Floating Point Problems-Footnote-1867022
-Node: Integer Programming867060
-Node: Floating-point Programming868871
-Ref: Floating-point Programming-Footnote-1875199
-Ref: Floating-point Programming-Footnote-2875469
-Node: Floating-point Representation875733
-Node: Floating-point Context876898
-Ref: table-ieee-formats877737
-Node: Rounding Mode879121
-Ref: table-rounding-modes879600
-Ref: Rounding Mode-Footnote-1882615
-Node: Gawk and MPFR882794
-Node: Arbitrary Precision Floats884203
-Ref: Arbitrary Precision Floats-Footnote-1886646
-Node: Setting Precision886967
-Ref: table-predefined-precision-strings887651
-Node: Setting Rounding Mode889796
-Ref: table-gawk-rounding-modes890200
-Node: Floating-point Constants891387
-Node: Changing Precision892839
-Ref: Changing Precision-Footnote-1894231
-Node: Exact Arithmetic894405
-Node: Arbitrary Precision Integers897539
-Ref: Arbitrary Precision Integers-Footnote-1900554
-Node: Dynamic Extensions900701
-Node: Extension Intro902159
-Node: Plugin License903424
-Node: Extension Mechanism Outline904109
-Ref: figure-load-extension904533
-Ref: figure-load-new-function906018
-Ref: figure-call-new-function907020
-Node: Extension API Description909004
-Node: Extension API Functions Introduction910454
-Node: General Data Types915320
-Ref: General Data Types-Footnote-1921013
-Node: Requesting Values921312
-Ref: table-value-types-returned922049
-Node: Memory Allocation Functions923007
-Ref: Memory Allocation Functions-Footnote-1925754
-Node: Constructor Functions925850
-Node: Registration Functions927608
-Node: Extension Functions928293
-Node: Exit Callback Functions930595
-Node: Extension Version String931844
-Node: Input Parsers932494
-Node: Output Wrappers942297
-Node: Two-way processors946813
-Node: Printing Messages949017
-Ref: Printing Messages-Footnote-1950094
-Node: Updating `ERRNO'950246
-Node: Accessing Parameters950985
-Node: Symbol Table Access952215
-Node: Symbol table by name952729
-Node: Symbol table by cookie954705
-Ref: Symbol table by cookie-Footnote-1958838
-Node: Cached values958901
-Ref: Cached values-Footnote-1962405
-Node: Array Manipulation962496
-Ref: Array Manipulation-Footnote-1963594
-Node: Array Data Types963633
-Ref: Array Data Types-Footnote-1966336
-Node: Array Functions966428
-Node: Flattening Arrays970302
-Node: Creating Arrays977154
-Node: Extension API Variables981885
-Node: Extension Versioning982521
-Node: Extension API Informational Variables984422
-Node: Extension API Boilerplate985508
-Node: Finding Extensions989312
-Node: Extension Example989872
-Node: Internal File Description990602
-Node: Internal File Ops994693
-Ref: Internal File Ops-Footnote-11006239
-Node: Using Internal File Ops1006379
-Ref: Using Internal File Ops-Footnote-11008726
-Node: Extension Samples1008994
-Node: Extension Sample File Functions1010518
-Node: Extension Sample Fnmatch1018086
-Node: Extension Sample Fork1019567
-Node: Extension Sample Inplace1020780
-Node: Extension Sample Ord1022560
-Node: Extension Sample Readdir1023396
-Ref: table-readdir-file-types1024252
-Node: Extension Sample Revout1025051
-Node: Extension Sample Rev2way1025642
-Node: Extension Sample Read write array1026383
-Node: Extension Sample Readfile1028262
-Node: Extension Sample API Tests1029362
-Node: Extension Sample Time1029887
-Node: gawkextlib1031202
-Node: Language History1033989
-Node: V7/SVR3.11035583
-Node: SVR41037903
-Node: POSIX1039345
-Node: BTL1040731
-Node: POSIX/GNU1041465
-Node: Feature History1047064
-Node: Common Extensions1060176
-Node: Ranges and Locales1061488
-Ref: Ranges and Locales-Footnote-11066105
-Ref: Ranges and Locales-Footnote-21066132
-Ref: Ranges and Locales-Footnote-31066366
-Node: Contributors1066587
-Node: Installation1072025
-Node: Gawk Distribution1072919
-Node: Getting1073403
-Node: Extracting1074229
-Node: Distribution contents1075871
-Node: Unix Installation1081588
-Node: Quick Installation1082205
-Node: Additional Configuration Options1084647
-Node: Configuration Philosophy1086385
-Node: Non-Unix Installation1088736
-Node: PC Installation1089194
-Node: PC Binary Installation1090505
-Node: PC Compiling1092353
-Ref: PC Compiling-Footnote-11095352
-Node: PC Testing1095457
-Node: PC Using1096633
-Node: Cygwin1100791
-Node: MSYS1101600
-Node: VMS Installation1102114
-Node: VMS Compilation1102910
-Ref: VMS Compilation-Footnote-11104132
-Node: VMS Dynamic Extensions1104190
-Node: VMS Installation Details1105563
-Node: VMS Running1107815
-Node: VMS GNV1110649
-Node: VMS Old Gawk1111372
-Node: Bugs1111842
-Node: Other Versions1115846
-Node: Notes1122071
-Node: Compatibility Mode1122871
-Node: Additions1123653
-Node: Accessing The Source1124578
-Node: Adding Code1126014
-Node: New Ports1132192
-Node: Derived Files1136673
-Ref: Derived Files-Footnote-11141754
-Ref: Derived Files-Footnote-21141788
-Ref: Derived Files-Footnote-31142384
-Node: Future Extensions1142498
-Node: Implementation Limitations1143104
-Node: Extension Design1144352
-Node: Old Extension Problems1145506
-Ref: Old Extension Problems-Footnote-11147023
-Node: Extension New Mechanism Goals1147080
-Ref: Extension New Mechanism Goals-Footnote-11150440
-Node: Extension Other Design Decisions1150629
-Node: Extension Future Growth1152735
-Node: Old Extension Mechanism1153571
-Node: Basic Concepts1155311
-Node: Basic High Level1155992
-Ref: figure-general-flow1156264
-Ref: figure-process-flow1156863
-Ref: Basic High Level-Footnote-11160092
-Node: Basic Data Typing1160277
-Node: Glossary1163604
-Node: Copying1188756
-Node: GNU Free Documentation License1226312
-Node: Index1251448
+Ref: Auto-set-Footnote-1442410
+Ref: Auto-set-Footnote-2442615
+Node: ARGC and ARGV442671
+Node: Pattern Action Summary446525
+Node: Arrays448748
+Node: Array Basics450297
+Node: Array Intro451123
+Ref: figure-array-elements453096
+Node: Reference to Elements455503
+Node: Assigning Elements457776
+Node: Array Example458267
+Node: Scanning an Array459999
+Node: Controlling Scanning463014
+Ref: Controlling Scanning-Footnote-1468187
+Node: Delete468503
+Ref: Delete-Footnote-1471268
+Node: Numeric Array Subscripts471325
+Node: Uninitialized Subscripts473508
+Node: Multidimensional475133
+Node: Multiscanning478226
+Node: Arrays of Arrays479815
+Node: Arrays Summary484478
+Node: Functions486583
+Node: Built-in487456
+Node: Calling Built-in488534
+Node: Numeric Functions490522
+Ref: Numeric Functions-Footnote-1494356
+Ref: Numeric Functions-Footnote-2494713
+Ref: Numeric Functions-Footnote-3494761
+Node: String Functions495030
+Ref: String Functions-Footnote-1518041
+Ref: String Functions-Footnote-2518170
+Ref: String Functions-Footnote-3518418
+Node: Gory Details518505
+Ref: table-sub-escapes520174
+Ref: table-sub-posix-92521528
+Ref: table-sub-proposed522879
+Ref: table-posix-sub524233
+Ref: table-gensub-escapes525778
+Ref: Gory Details-Footnote-1526954
+Ref: Gory Details-Footnote-2527005
+Node: I/O Functions527156
+Ref: I/O Functions-Footnote-1534279
+Node: Time Functions534426
+Ref: Time Functions-Footnote-1544890
+Ref: Time Functions-Footnote-2544958
+Ref: Time Functions-Footnote-3545116
+Ref: Time Functions-Footnote-4545227
+Ref: Time Functions-Footnote-5545339
+Ref: Time Functions-Footnote-6545566
+Node: Bitwise Functions545832
+Ref: table-bitwise-ops546394
+Ref: Bitwise Functions-Footnote-1550639
+Node: Type Functions550823
+Node: I18N Functions551965
+Node: User-defined553610
+Node: Definition Syntax554414
+Ref: Definition Syntax-Footnote-1559339
+Node: Function Example559408
+Ref: Function Example-Footnote-1562052
+Node: Function Caveats562074
+Node: Calling A Function562592
+Node: Variable Scope563547
+Node: Pass By Value/Reference566535
+Node: Return Statement570043
+Node: Dynamic Typing573027
+Node: Indirect Calls573956
+Node: Functions Summary583669
+Node: Library Functions586208
+Ref: Library Functions-Footnote-1589783
+Ref: Library Functions-Footnote-2589926
+Node: Library Names590097
+Ref: Library Names-Footnote-1593570
+Ref: Library Names-Footnote-2593790
+Node: General Functions593876
+Node: Strtonum Function594904
+Node: Assert Function597834
+Node: Round Function601160
+Node: Cliff Random Function602701
+Node: Ordinal Functions603717
+Ref: Ordinal Functions-Footnote-1606794
+Ref: Ordinal Functions-Footnote-2607046
+Node: Join Function607257
+Ref: Join Function-Footnote-1609028
+Node: Getlocaltime Function609228
+Node: Readfile Function612964
+Node: Data File Management614803
+Node: Filetrans Function615435
+Node: Rewind Function619504
+Node: File Checking620891
+Ref: File Checking-Footnote-1622023
+Node: Empty Files622224
+Node: Ignoring Assigns624454
+Node: Getopt Function626008
+Ref: Getopt Function-Footnote-1637311
+Node: Passwd Functions637514
+Ref: Passwd Functions-Footnote-1646493
+Node: Group Functions646581
+Ref: Group Functions-Footnote-1654523
+Node: Walking Arrays654736
+Node: Library Functions Summary656906
+Node: Sample Programs658268
+Node: Running Examples658995
+Node: Clones659723
+Node: Cut Program660947
+Node: Egrep Program670815
+Ref: Egrep Program-Footnote-1678786
+Node: Id Program678896
+Node: Split Program682560
+Ref: Split Program-Footnote-1686098
+Node: Tee Program686226
+Node: Uniq Program689033
+Node: Wc Program696463
+Ref: Wc Program-Footnote-1700731
+Ref: Wc Program-Footnote-2700931
+Node: Miscellaneous Programs701023
+Node: Dupword Program702236
+Node: Alarm Program704267
+Node: Translate Program709081
+Ref: Translate Program-Footnote-1713472
+Ref: Translate Program-Footnote-2713742
+Node: Labels Program713876
+Ref: Labels Program-Footnote-1717247
+Node: Word Sorting717331
+Node: History Sorting721374
+Node: Extract Program723210
+Ref: Extract Program-Footnote-1730785
+Node: Simple Sed730914
+Node: Igawk Program733976
+Ref: Igawk Program-Footnote-1749152
+Ref: Igawk Program-Footnote-2749353
+Node: Anagram Program749491
+Node: Signature Program752559
+Node: Programs Summary753806
+Node: Advanced Features754994
+Node: Nondecimal Data756942
+Node: Array Sorting758519
+Node: Controlling Array Traversal759216
+Node: Array Sorting Functions767496
+Ref: Array Sorting Functions-Footnote-1771403
+Node: Two-way I/O771597
+Ref: Two-way I/O-Footnote-1777113
+Node: TCP/IP Networking777195
+Node: Profiling780039
+Node: Advanced Features Summary787581
+Node: Internationalization789445
+Node: I18N and L10N790925
+Node: Explaining gettext791611
+Ref: Explaining gettext-Footnote-1796751
+Ref: Explaining gettext-Footnote-2796935
+Node: Programmer i18n797100
+Node: Translator i18n801325
+Node: String Extraction802119
+Ref: String Extraction-Footnote-1803080
+Node: Printf Ordering803166
+Ref: Printf Ordering-Footnote-1805948
+Node: I18N Portability806012
+Ref: I18N Portability-Footnote-1808461
+Node: I18N Example808524
+Ref: I18N Example-Footnote-1811246
+Node: Gawk I18N811318
+Node: I18N Summary811956
+Node: Debugger813295
+Node: Debugging814317
+Node: Debugging Concepts814758
+Node: Debugging Terms816614
+Node: Awk Debugging819211
+Node: Sample Debugging Session820103
+Node: Debugger Invocation820623
+Node: Finding The Bug821956
+Node: List of Debugger Commands828438
+Node: Breakpoint Control829770
+Node: Debugger Execution Control833434
+Node: Viewing And Changing Data836794
+Node: Execution Stack840152
+Node: Debugger Info841665
+Node: Miscellaneous Debugger Commands845659
+Node: Readline Support850843
+Node: Limitations851735
+Node: Debugging Summary854009
+Node: Arbitrary Precision Arithmetic855173
+Ref: Arbitrary Precision Arithmetic-Footnote-1856822
+Node: General Arithmetic856970
+Node: Floating Point Issues858690
+Node: String Conversion Precision859571
+Ref: String Conversion Precision-Footnote-1861276
+Node: Unexpected Results861385
+Node: POSIX Floating Point Problems863538
+Ref: POSIX Floating Point Problems-Footnote-1867359
+Node: Integer Programming867397
+Node: Floating-point Programming869208
+Ref: Floating-point Programming-Footnote-1875536
+Ref: Floating-point Programming-Footnote-2875806
+Node: Floating-point Representation876070
+Node: Floating-point Context877235
+Ref: table-ieee-formats878074
+Node: Rounding Mode879458
+Ref: table-rounding-modes879937
+Ref: Rounding Mode-Footnote-1882952
+Node: Gawk and MPFR883131
+Node: Arbitrary Precision Floats884540
+Ref: Arbitrary Precision Floats-Footnote-1886983
+Node: Setting Precision887304
+Ref: table-predefined-precision-strings887988
+Node: Setting Rounding Mode890133
+Ref: table-gawk-rounding-modes890537
+Node: Floating-point Constants891724
+Node: Changing Precision893176
+Ref: Changing Precision-Footnote-1894568
+Node: Exact Arithmetic894742
+Node: Arbitrary Precision Integers897876
+Ref: Arbitrary Precision Integers-Footnote-1900891
+Node: Dynamic Extensions901038
+Node: Extension Intro902496
+Node: Plugin License903761
+Node: Extension Mechanism Outline904446
+Ref: figure-load-extension904870
+Ref: figure-load-new-function906355
+Ref: figure-call-new-function907357
+Node: Extension API Description909341
+Node: Extension API Functions Introduction910791
+Node: General Data Types915657
+Ref: General Data Types-Footnote-1921350
+Node: Requesting Values921649
+Ref: table-value-types-returned922386
+Node: Memory Allocation Functions923344
+Ref: Memory Allocation Functions-Footnote-1926091
+Node: Constructor Functions926187
+Node: Registration Functions927945
+Node: Extension Functions928630
+Node: Exit Callback Functions930932
+Node: Extension Version String932181
+Node: Input Parsers932831
+Node: Output Wrappers942634
+Node: Two-way processors947150
+Node: Printing Messages949354
+Ref: Printing Messages-Footnote-1950431
+Node: Updating `ERRNO'950583
+Node: Accessing Parameters951322
+Node: Symbol Table Access952552
+Node: Symbol table by name953066
+Node: Symbol table by cookie955042
+Ref: Symbol table by cookie-Footnote-1959175
+Node: Cached values959238
+Ref: Cached values-Footnote-1962742
+Node: Array Manipulation962833
+Ref: Array Manipulation-Footnote-1963931
+Node: Array Data Types963970
+Ref: Array Data Types-Footnote-1966673
+Node: Array Functions966765
+Node: Flattening Arrays970639
+Node: Creating Arrays977491
+Node: Extension API Variables982222
+Node: Extension Versioning982858
+Node: Extension API Informational Variables984759
+Node: Extension API Boilerplate985845
+Node: Finding Extensions989649
+Node: Extension Example990209
+Node: Internal File Description990939
+Node: Internal File Ops995030
+Ref: Internal File Ops-Footnote-11006576
+Node: Using Internal File Ops1006716
+Ref: Using Internal File Ops-Footnote-11009063
+Node: Extension Samples1009331
+Node: Extension Sample File Functions1010855
+Node: Extension Sample Fnmatch1018423
+Node: Extension Sample Fork1019904
+Node: Extension Sample Inplace1021117
+Node: Extension Sample Ord1022897
+Node: Extension Sample Readdir1023733
+Ref: table-readdir-file-types1024589
+Node: Extension Sample Revout1025388
+Node: Extension Sample Rev2way1025979
+Node: Extension Sample Read write array1026720
+Node: Extension Sample Readfile1028599
+Node: Extension Sample API Tests1029699
+Node: Extension Sample Time1030224
+Node: gawkextlib1031539
+Node: Language History1034326
+Node: V7/SVR3.11035920
+Node: SVR41038240
+Node: POSIX1039682
+Node: BTL1041068
+Node: POSIX/GNU1041802
+Node: Feature History1047401
+Node: Common Extensions1060513
+Node: Ranges and Locales1061825
+Ref: Ranges and Locales-Footnote-11066442
+Ref: Ranges and Locales-Footnote-21066469
+Ref: Ranges and Locales-Footnote-31066703
+Node: Contributors1066924
+Node: Installation1072362
+Node: Gawk Distribution1073256
+Node: Getting1073740
+Node: Extracting1074566
+Node: Distribution contents1076208
+Node: Unix Installation1081925
+Node: Quick Installation1082542
+Node: Additional Configuration Options1084984
+Node: Configuration Philosophy1086722
+Node: Non-Unix Installation1089073
+Node: PC Installation1089531
+Node: PC Binary Installation1090842
+Node: PC Compiling1092690
+Ref: PC Compiling-Footnote-11095689
+Node: PC Testing1095794
+Node: PC Using1096970
+Node: Cygwin1101128
+Node: MSYS1101937
+Node: VMS Installation1102451
+Node: VMS Compilation1103247
+Ref: VMS Compilation-Footnote-11104469
+Node: VMS Dynamic Extensions1104527
+Node: VMS Installation Details1105900
+Node: VMS Running1108152
+Node: VMS GNV1110986
+Node: VMS Old Gawk1111709
+Node: Bugs1112179
+Node: Other Versions1116183
+Node: Notes1122408
+Node: Compatibility Mode1123208
+Node: Additions1123990
+Node: Accessing The Source1124915
+Node: Adding Code1126351
+Node: New Ports1132529
+Node: Derived Files1137010
+Ref: Derived Files-Footnote-11142091
+Ref: Derived Files-Footnote-21142125
+Ref: Derived Files-Footnote-31142721
+Node: Future Extensions1142835
+Node: Implementation Limitations1143441
+Node: Extension Design1144689
+Node: Old Extension Problems1145843
+Ref: Old Extension Problems-Footnote-11147360
+Node: Extension New Mechanism Goals1147417
+Ref: Extension New Mechanism Goals-Footnote-11150777
+Node: Extension Other Design Decisions1150966
+Node: Extension Future Growth1153072
+Node: Old Extension Mechanism1153908
+Node: Basic Concepts1155648
+Node: Basic High Level1156329
+Ref: figure-general-flow1156601
+Ref: figure-process-flow1157200
+Ref: Basic High Level-Footnote-11160429
+Node: Basic Data Typing1160614
+Node: Glossary1163941
+Node: Copying1189093
+Node: GNU Free Documentation License1226649
+Node: Index1251785

End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index 5aaacef8..9a1868a8 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -14405,10 +14405,18 @@ 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
@@ -37688,9 +37696,10 @@ 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:
@@ -37718,7 +37727,8 @@ 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 ef793fbd..446fb2c8 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -13785,10 +13785,18 @@ 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
@@ -36832,9 +36840,10 @@ 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:
@@ -36862,7 +36871,8 @@ 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 2025-05-10 19:09:02 +0000