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-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 f81579ac..cd175516 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -261,7 +261,7 @@
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>
@@ -335,6 +335,11 @@
* 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 9033128e..33dc1f01 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -10074,10 +10074,18 @@ 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
@@ -31604,9 +31612,9 @@ 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 89)
+* dark corner, FILENAME variable <1>: Auto-set. (line 97)
* dark corner, FILENAME variable: Getline Notes. (line 19)
-* dark corner, FNR/NR variables: Auto-set. (line 300)
+* dark corner, FNR/NR variables: Auto-set. (line 308)
* dark corner, format-control characters: Control Letters. (line 18)
* dark corner, FS as null string: Single Character Fields.
(line 20)
@@ -31790,12 +31798,12 @@ 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 81)
* 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 114)
+* differences in awk and gawk, FUNCTAB variable: Auto-set. (line 122)
* differences in awk and gawk, function arguments (gawk): Calling Built-in.
(line 16)
* differences in awk and gawk, getline command: Getline. (line 19)
@@ -31818,7 +31826,7 @@ 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 127)
+* differences in awk and gawk, PROCINFO array: Auto-set. (line 135)
* differences in awk and gawk, read timeouts: Read Timeout. (line 6)
* differences in awk and gawk, record separators: awk split records.
(line 124)
@@ -31828,7 +31836,7 @@ 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 256)
+* differences in awk and gawk, RT variable: Auto-set. (line 264)
* differences in awk and gawk, single-character fields: Single Character Fields.
(line 6)
* differences in awk and gawk, split() function: String Functions.
@@ -31836,7 +31844,7 @@ 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 260)
+* differences in awk and gawk, SYMTAB variable: Auto-set. (line 268)
* differences in awk and gawk, TEXTDOMAIN variable: User-modified.
(line 152)
* differences in awk and gawk, trunc-mod operation: Arithmetic Ops.
@@ -31877,8 +31885,8 @@ 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 132)
-* effective user ID of gawk user: Auto-set. (line 136)
+* effective group ID of gawk user: Auto-set. (line 140)
+* effective user ID of gawk user: Auto-set. (line 144)
* egrep utility <1>: Egrep Program. (line 6)
* egrep utility: Bracket Expressions. (line 24)
* egrep.awk program: Egrep Program. (line 53)
@@ -31934,13 +31942,13 @@ Index
(line 11)
* EREs (Extended Regular Expressions): Bracket Expressions. (line 24)
* ERRNO variable <1>: TCP/IP Networking. (line 54)
-* ERRNO variable: Auto-set. (line 73)
+* ERRNO variable: Auto-set. (line 81)
* 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 73)
+* error handling, ERRNO variable and: Auto-set. (line 81)
* error output: Special FD. (line 6)
* escape processing, gsub()/gensub()/sub() functions: Gory Details.
(line 6)
@@ -31994,7 +32002,7 @@ Index
(line 6)
* extension API version: Extension Versioning.
(line 6)
-* extension API, version number: Auto-set. (line 223)
+* extension API, version number: Auto-set. (line 231)
* extension example: Extension Example. (line 6)
* extension registration: Registration Functions.
(line 6)
@@ -32073,7 +32081,7 @@ Index
* file names, distinguishing: Auto-set. (line 55)
* 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 89)
+* FILENAME variable <1>: Auto-set. (line 97)
* FILENAME variable: Reading Files. (line 6)
* FILENAME variable, getline, setting with: Getline Notes. (line 19)
* filenames, assignments as: Ignoring Assigns. (line 6)
@@ -32143,9 +32151,9 @@ Index
* flush buffered output: I/O Functions. (line 28)
* fnmatch() extension function: Extension Sample Fnmatch.
(line 12)
-* FNR variable <1>: Auto-set. (line 98)
+* FNR variable <1>: Auto-set. (line 106)
* FNR variable: Records. (line 6)
-* FNR variable, changing: Auto-set. (line 300)
+* FNR variable, changing: Auto-set. (line 308)
* for statement: For Statement. (line 6)
* for statement, looping over arrays: Scanning an Array. (line 20)
* fork() extension function: Extension Sample Fork.
@@ -32195,7 +32203,7 @@ Index
* FSF (Free Software Foundation): Manual History. (line 6)
* fts() extension function: Extension Sample File Functions.
(line 61)
-* FUNCTAB array: Auto-set. (line 114)
+* FUNCTAB array: Auto-set. (line 122)
* function calls: Function Calls. (line 6)
* function calls, indirect: Indirect Calls. (line 6)
* function definition example: Function Example. (line 6)
@@ -32245,7 +32253,7 @@ Index
* G-d: Acknowledgments. (line 78)
* Garfinkle, Scott: Contributors. (line 34)
* gawk program, dynamic profiling: Profiling. (line 179)
-* gawk version: Auto-set. (line 198)
+* gawk version: Auto-set. (line 206)
* gawk, ARGIND variable in: Other Arguments. (line 12)
* gawk, awk and <1>: This Manual. (line 14)
* gawk, awk and: Preface. (line 23)
@@ -32266,7 +32274,7 @@ 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 81)
* gawk, ERRNO variable in <3>: BEGINFILE/ENDFILE. (line 26)
* gawk, ERRNO variable in <4>: Close Files And Pipes.
(line 139)
@@ -32283,7 +32291,7 @@ 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 114)
+* gawk, FUNCTAB array in: Auto-set. (line 122)
* 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.
@@ -32314,7 +32322,7 @@ 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 127)
+* gawk, PROCINFO array in: Auto-set. (line 135)
* gawk, regexp constants and: Using Constant Regexps.
(line 28)
* gawk, regular expressions, case sensitivity: Case-sensitivity.
@@ -32322,14 +32330,14 @@ 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 256)
+* gawk, RT variable in <1>: Auto-set. (line 264)
* 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 260)
+* gawk, SYMTAB array in: Auto-set. (line 268)
* gawk, TEXTDOMAIN variable in: User-modified. (line 152)
* gawk, timestamps: Time Functions. (line 6)
* gawk, uses for: Preface. (line 36)
@@ -32416,7 +32424,7 @@ 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 171)
+* group ID of gawk user: Auto-set. (line 179)
* groups, information about: Group Functions. (line 6)
* gsub <1>: String Functions. (line 139)
* gsub: Using Constant Regexps.
@@ -32713,7 +32721,7 @@ 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 212)
+* maximum precision supported by MPFR library: Auto-set. (line 220)
* McIlroy, Doug: Glossary. (line 149)
* McPhee, Patrick: Contributors. (line 100)
* message object files: Explaining gettext. (line 42)
@@ -32726,7 +32734,7 @@ 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 215)
+* minimum precision supported by MPFR library: Auto-set. (line 223)
* mktime: Time Functions. (line 25)
* modifiers, in format specifiers: Format Modifiers. (line 6)
* monetary information, localization: Explaining gettext. (line 104)
@@ -32780,7 +32788,7 @@ Index
(line 47)
* nexti debugger command: Debugger Execution Control.
(line 49)
-* NF variable <1>: Auto-set. (line 103)
+* NF variable <1>: Auto-set. (line 111)
* NF variable: Fields. (line 33)
* NF variable, decrementing: Changing Fields. (line 107)
* ni debugger command (alias for nexti): Debugger Execution Control.
@@ -32789,9 +32797,9 @@ Index
* non-existent array elements: Reference to Elements.
(line 23)
* not Boolean-logic operator: Boolean Ops. (line 6)
-* NR variable <1>: Auto-set. (line 122)
+* NR variable <1>: Auto-set. (line 130)
* NR variable: Records. (line 6)
-* NR variable, changing: Auto-set. (line 300)
+* NR variable, changing: Auto-set. (line 308)
* null strings <1>: Basic Data Typing. (line 26)
* null strings <2>: Truth Values. (line 6)
* null strings <3>: Regexp Field Splitting.
@@ -32906,7 +32914,7 @@ 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 180)
+* parent process ID of gawk process: Auto-set. (line 188)
* parentheses (), in a profile: Profiling. (line 146)
* parentheses (), regexp operator: Regexp Operators. (line 80)
* password file: Passwd Functions. (line 16)
@@ -33071,24 +33079,24 @@ 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 174)
-* process ID of gawk process: Auto-set. (line 177)
+* process group idIDof gawk process: Auto-set. (line 182)
+* process ID of gawk process: Auto-set. (line 185)
* 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 127)
+* PROCINFO array: Auto-set. (line 135)
* 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 233)
+* PROCINFO array, uses: Auto-set. (line 241)
* 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 145)
+* program identifiers: Auto-set. (line 153)
* program, definition of: Getting Started. (line 21)
* programmers, attractiveness of: Two-way I/O. (line 6)
* programming conventions, --non-decimal-data option: Nondecimal Data.
@@ -33248,7 +33256,7 @@ 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 243)
+* RLENGTH variable: Auto-set. (line 251)
* RLENGTH variable, match() function and: String Functions. (line 224)
* Robbins, Arnold <1>: Future Extensions. (line 6)
* Robbins, Arnold <2>: Bugs. (line 32)
@@ -33277,9 +33285,9 @@ 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 249)
+* RSTART variable: Auto-set. (line 257)
* RSTART variable, match() function and: String Functions. (line 224)
-* RT variable <1>: Auto-set. (line 256)
+* RT variable <1>: Auto-set. (line 264)
* RT variable <2>: Multiple Line. (line 129)
* RT variable: awk split records. (line 124)
* Rubin, Paul <1>: Contributors. (line 15)
@@ -33299,7 +33307,7 @@ 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 283)
+* Schorr, Andrew <2>: Auto-set. (line 291)
* Schorr, Andrew: Acknowledgments. (line 60)
* Schreiber, Bert: Acknowledgments. (line 38)
* Schreiber, Rita: Acknowledgments. (line 38)
@@ -33387,7 +33395,7 @@ Index
(line 110)
* sidebar, Changing FS Does Not Affect the Fields: Field Splitting Summary.
(line 38)
-* sidebar, Changing NR and FNR: Auto-set. (line 298)
+* sidebar, Changing NR and FNR: Auto-set. (line 306)
* sidebar, Controlling Output Buffering with system(): I/O Functions.
(line 138)
* sidebar, Escape Sequences for Metacharacters: Escape Sequences.
@@ -33549,9 +33557,9 @@ 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 228)
+* supplementary groups of gawk process: Auto-set. (line 236)
* switch statement: Switch Statement. (line 6)
-* SYMTAB array: Auto-set. (line 260)
+* SYMTAB array: Auto-set. (line 268)
* syntactic ambiguity: /= operator vs. /=.../ regexp constant: Assignment Ops.
(line 148)
* system: I/O Functions. (line 75)
@@ -33729,10 +33737,10 @@ Index
* variables, uninitialized, as array subscripts: Uninitialized Subscripts.
(line 6)
* variables, user-defined: Variables. (line 6)
-* version of gawk: Auto-set. (line 198)
-* version of gawk extension API: Auto-set. (line 223)
-* version of GNU MP library: Auto-set. (line 209)
-* version of GNU MPFR library: Auto-set. (line 205)
+* version of gawk: Auto-set. (line 206)
+* version of gawk extension API: Auto-set. (line 231)
+* version of GNU MP library: Auto-set. (line 217)
+* version of GNU MPFR library: Auto-set. (line 213)
* vertical bar (|): Regexp Operators. (line 70)
* vertical bar (|), | operator (I/O) <1>: Precedence. (line 65)
* vertical bar (|), | operator (I/O): Getline/Pipe. (line 9)
@@ -34017,354 +34025,354 @@ Node: Built-in Variables420302
Node: User-modified421429
Ref: User-modified-Footnote-1429114
Node: Auto-set429176
-Ref: Auto-set-Footnote-1441722
-Ref: Auto-set-Footnote-2441927
-Node: ARGC and ARGV441983
-Node: Pattern Action Summary445822
-Node: Arrays448045
-Node: Array Basics449594
-Node: Array Intro450420
-Ref: figure-array-elements452393
-Node: Reference to Elements454800
-Node: Assigning Elements457073
-Node: Array Example457564
-Node: Scanning an Array459296
-Node: Controlling Scanning462311
-Ref: Controlling Scanning-Footnote-1467484
-Node: Delete467800
-Ref: Delete-Footnote-1470565
-Node: Numeric Array Subscripts470622
-Node: Uninitialized Subscripts472805
-Node: Multidimensional474430
-Node: Multiscanning477523
-Node: Arrays of Arrays479112
-Node: Arrays Summary483775
-Node: Functions485880
-Node: Built-in486753
-Node: Calling Built-in487831
-Node: Numeric Functions489819
-Ref: Numeric Functions-Footnote-1493653
-Ref: Numeric Functions-Footnote-2494010
-Ref: Numeric Functions-Footnote-3494058
-Node: String Functions494327
-Ref: String Functions-Footnote-1517338
-Ref: String Functions-Footnote-2517467
-Ref: String Functions-Footnote-3517715
-Node: Gory Details517802
-Ref: table-sub-escapes519471
-Ref: table-sub-posix-92520825
-Ref: table-sub-proposed522176
-Ref: table-posix-sub523530
-Ref: table-gensub-escapes525075
-Ref: Gory Details-Footnote-1526251
-Ref: Gory Details-Footnote-2526302
-Node: I/O Functions526453
-Ref: I/O Functions-Footnote-1533576
-Node: Time Functions533723
-Ref: Time Functions-Footnote-1544187
-Ref: Time Functions-Footnote-2544255
-Ref: Time Functions-Footnote-3544413
-Ref: Time Functions-Footnote-4544524
-Ref: Time Functions-Footnote-5544636
-Ref: Time Functions-Footnote-6544863
-Node: Bitwise Functions545129
-Ref: table-bitwise-ops545691
-Ref: Bitwise Functions-Footnote-1549936
-Node: Type Functions550120
-Node: I18N Functions551262
-Node: User-defined552907
-Node: Definition Syntax553711
-Ref: Definition Syntax-Footnote-1558636
-Node: Function Example558705
-Ref: Function Example-Footnote-1561349
-Node: Function Caveats561371
-Node: Calling A Function561889
-Node: Variable Scope562844
-Node: Pass By Value/Reference565832
-Node: Return Statement569340
-Node: Dynamic Typing572324
-Node: Indirect Calls573253
-Node: Functions Summary582966
-Node: Library Functions585505
-Ref: Library Functions-Footnote-1589080
-Ref: Library Functions-Footnote-2589223
-Node: Library Names589394
-Ref: Library Names-Footnote-1592867
-Ref: Library Names-Footnote-2593087
-Node: General Functions593173
-Node: Strtonum Function594201
-Node: Assert Function597131
-Node: Round Function600457
-Node: Cliff Random Function601998
-Node: Ordinal Functions603014
-Ref: Ordinal Functions-Footnote-1606091
-Ref: Ordinal Functions-Footnote-2606343
-Node: Join Function606554
-Ref: Join Function-Footnote-1608325
-Node: Getlocaltime Function608525
-Node: Readfile Function612261
-Node: Data File Management614100
-Node: Filetrans Function614732
-Node: Rewind Function618787
-Node: File Checking620174
-Ref: File Checking-Footnote-1621306
-Node: Empty Files621507
-Node: Ignoring Assigns623730
-Node: Getopt Function625263
-Ref: Getopt Function-Footnote-1636559
-Node: Passwd Functions636762
-Ref: Passwd Functions-Footnote-1645741
-Node: Group Functions645829
-Ref: Group Functions-Footnote-1653771
-Node: Walking Arrays653984
-Node: Library Functions Summary656154
-Node: Sample Programs657516
-Node: Running Examples658243
-Node: Clones658971
-Node: Cut Program660195
-Node: Egrep Program670056
-Ref: Egrep Program-Footnote-1677985
-Node: Id Program678095
-Node: Split Program681759
-Ref: Split Program-Footnote-1685290
-Node: Tee Program685418
-Node: Uniq Program688225
-Node: Wc Program695655
-Ref: Wc Program-Footnote-1699923
-Ref: Wc Program-Footnote-2700123
-Node: Miscellaneous Programs700215
-Node: Dupword Program701428
-Node: Alarm Program703459
-Node: Translate Program708273
-Ref: Translate Program-Footnote-1712664
-Ref: Translate Program-Footnote-2712934
-Node: Labels Program713068
-Ref: Labels Program-Footnote-1716439
-Node: Word Sorting716523
-Node: History Sorting720566
-Node: Extract Program722402
-Ref: Extract Program-Footnote-1729977
-Node: Simple Sed730106
-Node: Igawk Program733168
-Ref: Igawk Program-Footnote-1748344
-Ref: Igawk Program-Footnote-2748545
-Node: Anagram Program748683
-Node: Signature Program751751
-Node: Programs Summary752998
-Node: Advanced Features754186
-Node: Nondecimal Data756134
-Node: Array Sorting757711
-Node: Controlling Array Traversal758408
-Node: Array Sorting Functions766688
-Ref: Array Sorting Functions-Footnote-1770595
-Node: Two-way I/O770789
-Ref: Two-way I/O-Footnote-1776305
-Node: TCP/IP Networking776387
-Node: Profiling779231
-Node: Advanced Features Summary786773
-Node: Internationalization788637
-Node: I18N and L10N790117
-Node: Explaining gettext790803
-Ref: Explaining gettext-Footnote-1795943
-Ref: Explaining gettext-Footnote-2796127
-Node: Programmer i18n796292
-Node: Translator i18n800517
-Node: String Extraction801311
-Ref: String Extraction-Footnote-1802272
-Node: Printf Ordering802358
-Ref: Printf Ordering-Footnote-1805140
-Node: I18N Portability805204
-Ref: I18N Portability-Footnote-1807653
-Node: I18N Example807716
-Ref: I18N Example-Footnote-1810438
-Node: Gawk I18N810510
-Node: I18N Summary811148
-Node: Debugger812487
-Node: Debugging813509
-Node: Debugging Concepts813950
-Node: Debugging Terms815806
-Node: Awk Debugging818403
-Node: Sample Debugging Session819295
-Node: Debugger Invocation819815
-Node: Finding The Bug821148
-Node: List of Debugger Commands827630
-Node: Breakpoint Control828962
-Node: Debugger Execution Control832626
-Node: Viewing And Changing Data835986
-Node: Execution Stack839344
-Node: Debugger Info840857
-Node: Miscellaneous Debugger Commands844851
-Node: Readline Support850035
-Node: Limitations850927
-Node: Debugging Summary853201
-Node: Arbitrary Precision Arithmetic854365
-Ref: Arbitrary Precision Arithmetic-Footnote-1856014
-Node: General Arithmetic856162
-Node: Floating Point Issues857882
-Node: String Conversion Precision858763
-Ref: String Conversion Precision-Footnote-1860468
-Node: Unexpected Results860577
-Node: POSIX Floating Point Problems862730
-Ref: POSIX Floating Point Problems-Footnote-1866551
-Node: Integer Programming866589
-Node: Floating-point Programming868400
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-Ref: Floating-point Programming-Footnote-2874998
-Node: Floating-point Representation875262
-Node: Floating-point Context876427
-Ref: table-ieee-formats877266
-Node: Rounding Mode878650
-Ref: table-rounding-modes879129
-Ref: Rounding Mode-Footnote-1882144
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-Node: Arbitrary Precision Floats883732
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-Node: Setting Precision886496
-Ref: table-predefined-precision-strings887180
-Node: Setting Rounding Mode889325
-Ref: table-gawk-rounding-modes889729
-Node: Floating-point Constants890916
-Node: Changing Precision892368
-Ref: Changing Precision-Footnote-1893760
-Node: Exact Arithmetic893934
-Node: Arbitrary Precision Integers897068
-Ref: Arbitrary Precision Integers-Footnote-1900083
-Node: Dynamic Extensions900230
-Node: Extension Intro901688
-Node: Plugin License902953
-Node: Extension Mechanism Outline903638
-Ref: figure-load-extension904062
-Ref: figure-load-new-function905547
-Ref: figure-call-new-function906549
-Node: Extension API Description908533
-Node: Extension API Functions Introduction909983
-Node: General Data Types914849
-Ref: General Data Types-Footnote-1920542
-Node: Requesting Values920841
-Ref: table-value-types-returned921578
-Node: Memory Allocation Functions922536
-Ref: Memory Allocation Functions-Footnote-1925283
-Node: Constructor Functions925379
-Node: Registration Functions927137
-Node: Extension Functions927822
-Node: Exit Callback Functions930124
-Node: Extension Version String931374
-Node: Input Parsers932024
-Node: Output Wrappers941827
-Node: Two-way processors946343
-Node: Printing Messages948547
-Ref: Printing Messages-Footnote-1949624
-Node: Updating `ERRNO'949776
-Node: Accessing Parameters950515
-Node: Symbol Table Access951745
-Node: Symbol table by name952259
-Node: Symbol table by cookie954235
-Ref: Symbol table by cookie-Footnote-1958368
-Node: Cached values958431
-Ref: Cached values-Footnote-1961936
-Node: Array Manipulation962027
-Ref: Array Manipulation-Footnote-1963125
-Node: Array Data Types963164
-Ref: Array Data Types-Footnote-1965867
-Node: Array Functions965959
-Node: Flattening Arrays969833
-Node: Creating Arrays976685
-Node: Extension API Variables981416
-Node: Extension Versioning982052
-Node: Extension API Informational Variables983953
-Node: Extension API Boilerplate985039
-Node: Finding Extensions988843
-Node: Extension Example989403
-Node: Internal File Description990133
-Node: Internal File Ops994224
-Ref: Internal File Ops-Footnote-11005770
-Node: Using Internal File Ops1005910
-Ref: Using Internal File Ops-Footnote-11008257
-Node: Extension Samples1008525
-Node: Extension Sample File Functions1010049
-Node: Extension Sample Fnmatch1017617
-Node: Extension Sample Fork1019084
-Node: Extension Sample Inplace1020297
-Node: Extension Sample Ord1022063
-Node: Extension Sample Readdir1022899
-Ref: table-readdir-file-types1023748
-Node: Extension Sample Revout1024547
-Node: Extension Sample Rev2way1025138
-Node: Extension Sample Read write array1025879
-Node: Extension Sample Readfile1027758
-Node: Extension Sample API Tests1028858
-Node: Extension Sample Time1029383
-Node: gawkextlib1030698
-Node: Language History1033485
-Node: V7/SVR3.11035079
-Node: SVR41037399
-Node: POSIX1038841
-Node: BTL1040227
-Node: POSIX/GNU1040961
-Node: Feature History1046560
-Node: Common Extensions1059672
-Node: Ranges and Locales1060984
-Ref: Ranges and Locales-Footnote-11065601
-Ref: Ranges and Locales-Footnote-21065628
-Ref: Ranges and Locales-Footnote-31065862
-Node: Contributors1066083
-Node: Installation1071521
-Node: Gawk Distribution1072415
-Node: Getting1072899
-Node: Extracting1073725
-Node: Distribution contents1075367
-Node: Unix Installation1081084
-Node: Quick Installation1081701
-Node: Additional Configuration Options1084143
-Node: Configuration Philosophy1085881
-Node: Non-Unix Installation1088232
-Node: PC Installation1088690
-Node: PC Binary Installation1090001
-Node: PC Compiling1091849
-Ref: PC Compiling-Footnote-11094848
-Node: PC Testing1094953
-Node: PC Using1096129
-Node: Cygwin1100287
-Node: MSYS1101096
-Node: VMS Installation1101610
-Node: VMS Compilation1102406
-Ref: VMS Compilation-Footnote-11103621
-Node: VMS Dynamic Extensions1103679
-Node: VMS Installation Details1105052
-Node: VMS Running1107298
-Node: VMS GNV1110132
-Node: VMS Old Gawk1110855
-Node: Bugs1111325
-Node: Other Versions1115329
-Node: Notes1121554
-Node: Compatibility Mode1122354
-Node: Additions1123136
-Node: Accessing The Source1124061
-Node: Adding Code1125497
-Node: New Ports1131675
-Node: Derived Files1136156
-Ref: Derived Files-Footnote-11141237
-Ref: Derived Files-Footnote-21141271
-Ref: Derived Files-Footnote-31141867
-Node: Future Extensions1141981
-Node: Implementation Limitations1142587
-Node: Extension Design1143835
-Node: Old Extension Problems1144989
-Ref: Old Extension Problems-Footnote-11146506
-Node: Extension New Mechanism Goals1146563
-Ref: Extension New Mechanism Goals-Footnote-11149924
-Node: Extension Other Design Decisions1150113
-Node: Extension Future Growth1152219
-Node: Old Extension Mechanism1153055
-Node: Basic Concepts1154795
-Node: Basic High Level1155476
-Ref: figure-general-flow1155748
-Ref: figure-process-flow1156347
-Ref: Basic High Level-Footnote-11159576
-Node: Basic Data Typing1159761
-Node: Glossary1163088
-Node: Copying1188240
-Node: GNU Free Documentation License1225796
-Node: Index1250932
+Ref: Auto-set-Footnote-1442059
+Ref: Auto-set-Footnote-2442264
+Node: ARGC and ARGV442320
+Node: Pattern Action Summary446159
+Node: Arrays448382
+Node: Array Basics449931
+Node: Array Intro450757
+Ref: figure-array-elements452730
+Node: Reference to Elements455137
+Node: Assigning Elements457410
+Node: Array Example457901
+Node: Scanning an Array459633
+Node: Controlling Scanning462648
+Ref: Controlling Scanning-Footnote-1467821
+Node: Delete468137
+Ref: Delete-Footnote-1470902
+Node: Numeric Array Subscripts470959
+Node: Uninitialized Subscripts473142
+Node: Multidimensional474767
+Node: Multiscanning477860
+Node: Arrays of Arrays479449
+Node: Arrays Summary484112
+Node: Functions486217
+Node: Built-in487090
+Node: Calling Built-in488168
+Node: Numeric Functions490156
+Ref: Numeric Functions-Footnote-1493990
+Ref: Numeric Functions-Footnote-2494347
+Ref: Numeric Functions-Footnote-3494395
+Node: String Functions494664
+Ref: String Functions-Footnote-1517675
+Ref: String Functions-Footnote-2517804
+Ref: String Functions-Footnote-3518052
+Node: Gory Details518139
+Ref: table-sub-escapes519808
+Ref: table-sub-posix-92521162
+Ref: table-sub-proposed522513
+Ref: table-posix-sub523867
+Ref: table-gensub-escapes525412
+Ref: Gory Details-Footnote-1526588
+Ref: Gory Details-Footnote-2526639
+Node: I/O Functions526790
+Ref: I/O Functions-Footnote-1533913
+Node: Time Functions534060
+Ref: Time Functions-Footnote-1544524
+Ref: Time Functions-Footnote-2544592
+Ref: Time Functions-Footnote-3544750
+Ref: Time Functions-Footnote-4544861
+Ref: Time Functions-Footnote-5544973
+Ref: Time Functions-Footnote-6545200
+Node: Bitwise Functions545466
+Ref: table-bitwise-ops546028
+Ref: Bitwise Functions-Footnote-1550273
+Node: Type Functions550457
+Node: I18N Functions551599
+Node: User-defined553244
+Node: Definition Syntax554048
+Ref: Definition Syntax-Footnote-1558973
+Node: Function Example559042
+Ref: Function Example-Footnote-1561686
+Node: Function Caveats561708
+Node: Calling A Function562226
+Node: Variable Scope563181
+Node: Pass By Value/Reference566169
+Node: Return Statement569677
+Node: Dynamic Typing572661
+Node: Indirect Calls573590
+Node: Functions Summary583303
+Node: Library Functions585842
+Ref: Library Functions-Footnote-1589417
+Ref: Library Functions-Footnote-2589560
+Node: Library Names589731
+Ref: Library Names-Footnote-1593204
+Ref: Library Names-Footnote-2593424
+Node: General Functions593510
+Node: Strtonum Function594538
+Node: Assert Function597468
+Node: Round Function600794
+Node: Cliff Random Function602335
+Node: Ordinal Functions603351
+Ref: Ordinal Functions-Footnote-1606428
+Ref: Ordinal Functions-Footnote-2606680
+Node: Join Function606891
+Ref: Join Function-Footnote-1608662
+Node: Getlocaltime Function608862
+Node: Readfile Function612598
+Node: Data File Management614437
+Node: Filetrans Function615069
+Node: Rewind Function619124
+Node: File Checking620511
+Ref: File Checking-Footnote-1621643
+Node: Empty Files621844
+Node: Ignoring Assigns624067
+Node: Getopt Function625600
+Ref: Getopt Function-Footnote-1636896
+Node: Passwd Functions637099
+Ref: Passwd Functions-Footnote-1646078
+Node: Group Functions646166
+Ref: Group Functions-Footnote-1654108
+Node: Walking Arrays654321
+Node: Library Functions Summary656491
+Node: Sample Programs657853
+Node: Running Examples658580
+Node: Clones659308
+Node: Cut Program660532
+Node: Egrep Program670393
+Ref: Egrep Program-Footnote-1678322
+Node: Id Program678432
+Node: Split Program682096
+Ref: Split Program-Footnote-1685627
+Node: Tee Program685755
+Node: Uniq Program688562
+Node: Wc Program695992
+Ref: Wc Program-Footnote-1700260
+Ref: Wc Program-Footnote-2700460
+Node: Miscellaneous Programs700552
+Node: Dupword Program701765
+Node: Alarm Program703796
+Node: Translate Program708610
+Ref: Translate Program-Footnote-1713001
+Ref: Translate Program-Footnote-2713271
+Node: Labels Program713405
+Ref: Labels Program-Footnote-1716776
+Node: Word Sorting716860
+Node: History Sorting720903
+Node: Extract Program722739
+Ref: Extract Program-Footnote-1730314
+Node: Simple Sed730443
+Node: Igawk Program733505
+Ref: Igawk Program-Footnote-1748681
+Ref: Igawk Program-Footnote-2748882
+Node: Anagram Program749020
+Node: Signature Program752088
+Node: Programs Summary753335
+Node: Advanced Features754523
+Node: Nondecimal Data756471
+Node: Array Sorting758048
+Node: Controlling Array Traversal758745
+Node: Array Sorting Functions767025
+Ref: Array Sorting Functions-Footnote-1770932
+Node: Two-way I/O771126
+Ref: Two-way I/O-Footnote-1776642
+Node: TCP/IP Networking776724
+Node: Profiling779568
+Node: Advanced Features Summary787110
+Node: Internationalization788974
+Node: I18N and L10N790454
+Node: Explaining gettext791140
+Ref: Explaining gettext-Footnote-1796280
+Ref: Explaining gettext-Footnote-2796464
+Node: Programmer i18n796629
+Node: Translator i18n800854
+Node: String Extraction801648
+Ref: String Extraction-Footnote-1802609
+Node: Printf Ordering802695
+Ref: Printf Ordering-Footnote-1805477
+Node: I18N Portability805541
+Ref: I18N Portability-Footnote-1807990
+Node: I18N Example808053
+Ref: I18N Example-Footnote-1810775
+Node: Gawk I18N810847
+Node: I18N Summary811485
+Node: Debugger812824
+Node: Debugging813846
+Node: Debugging Concepts814287
+Node: Debugging Terms816143
+Node: Awk Debugging818740
+Node: Sample Debugging Session819632
+Node: Debugger Invocation820152
+Node: Finding The Bug821485
+Node: List of Debugger Commands827967
+Node: Breakpoint Control829299
+Node: Debugger Execution Control832963
+Node: Viewing And Changing Data836323
+Node: Execution Stack839681
+Node: Debugger Info841194
+Node: Miscellaneous Debugger Commands845188
+Node: Readline Support850372
+Node: Limitations851264
+Node: Debugging Summary853538
+Node: Arbitrary Precision Arithmetic854702
+Ref: Arbitrary Precision Arithmetic-Footnote-1856351
+Node: General Arithmetic856499
+Node: Floating Point Issues858219
+Node: String Conversion Precision859100
+Ref: String Conversion Precision-Footnote-1860805
+Node: Unexpected Results860914
+Node: POSIX Floating Point Problems863067
+Ref: POSIX Floating Point Problems-Footnote-1866888
+Node: Integer Programming866926
+Node: Floating-point Programming868737
+Ref: Floating-point Programming-Footnote-1875065
+Ref: Floating-point Programming-Footnote-2875335
+Node: Floating-point Representation875599
+Node: Floating-point Context876764
+Ref: table-ieee-formats877603
+Node: Rounding Mode878987
+Ref: table-rounding-modes879466
+Ref: Rounding Mode-Footnote-1882481
+Node: Gawk and MPFR882660
+Node: Arbitrary Precision Floats884069
+Ref: Arbitrary Precision Floats-Footnote-1886512
+Node: Setting Precision886833
+Ref: table-predefined-precision-strings887517
+Node: Setting Rounding Mode889662
+Ref: table-gawk-rounding-modes890066
+Node: Floating-point Constants891253
+Node: Changing Precision892705
+Ref: Changing Precision-Footnote-1894097
+Node: Exact Arithmetic894271
+Node: Arbitrary Precision Integers897405
+Ref: Arbitrary Precision Integers-Footnote-1900420
+Node: Dynamic Extensions900567
+Node: Extension Intro902025
+Node: Plugin License903290
+Node: Extension Mechanism Outline903975
+Ref: figure-load-extension904399
+Ref: figure-load-new-function905884
+Ref: figure-call-new-function906886
+Node: Extension API Description908870
+Node: Extension API Functions Introduction910320
+Node: General Data Types915186
+Ref: General Data Types-Footnote-1920879
+Node: Requesting Values921178
+Ref: table-value-types-returned921915
+Node: Memory Allocation Functions922873
+Ref: Memory Allocation Functions-Footnote-1925620
+Node: Constructor Functions925716
+Node: Registration Functions927474
+Node: Extension Functions928159
+Node: Exit Callback Functions930461
+Node: Extension Version String931711
+Node: Input Parsers932361
+Node: Output Wrappers942164
+Node: Two-way processors946680
+Node: Printing Messages948884
+Ref: Printing Messages-Footnote-1949961
+Node: Updating `ERRNO'950113
+Node: Accessing Parameters950852
+Node: Symbol Table Access952082
+Node: Symbol table by name952596
+Node: Symbol table by cookie954572
+Ref: Symbol table by cookie-Footnote-1958705
+Node: Cached values958768
+Ref: Cached values-Footnote-1962273
+Node: Array Manipulation962364
+Ref: Array Manipulation-Footnote-1963462
+Node: Array Data Types963501
+Ref: Array Data Types-Footnote-1966204
+Node: Array Functions966296
+Node: Flattening Arrays970170
+Node: Creating Arrays977022
+Node: Extension API Variables981753
+Node: Extension Versioning982389
+Node: Extension API Informational Variables984290
+Node: Extension API Boilerplate985376
+Node: Finding Extensions989180
+Node: Extension Example989740
+Node: Internal File Description990470
+Node: Internal File Ops994561
+Ref: Internal File Ops-Footnote-11006107
+Node: Using Internal File Ops1006247
+Ref: Using Internal File Ops-Footnote-11008594
+Node: Extension Samples1008862
+Node: Extension Sample File Functions1010386
+Node: Extension Sample Fnmatch1017954
+Node: Extension Sample Fork1019421
+Node: Extension Sample Inplace1020634
+Node: Extension Sample Ord1022400
+Node: Extension Sample Readdir1023236
+Ref: table-readdir-file-types1024085
+Node: Extension Sample Revout1024884
+Node: Extension Sample Rev2way1025475
+Node: Extension Sample Read write array1026216
+Node: Extension Sample Readfile1028095
+Node: Extension Sample API Tests1029195
+Node: Extension Sample Time1029720
+Node: gawkextlib1031035
+Node: Language History1033822
+Node: V7/SVR3.11035416
+Node: SVR41037736
+Node: POSIX1039178
+Node: BTL1040564
+Node: POSIX/GNU1041298
+Node: Feature History1046897
+Node: Common Extensions1060009
+Node: Ranges and Locales1061321
+Ref: Ranges and Locales-Footnote-11065938
+Ref: Ranges and Locales-Footnote-21065965
+Ref: Ranges and Locales-Footnote-31066199
+Node: Contributors1066420
+Node: Installation1071858
+Node: Gawk Distribution1072752
+Node: Getting1073236
+Node: Extracting1074062
+Node: Distribution contents1075704
+Node: Unix Installation1081421
+Node: Quick Installation1082038
+Node: Additional Configuration Options1084480
+Node: Configuration Philosophy1086218
+Node: Non-Unix Installation1088569
+Node: PC Installation1089027
+Node: PC Binary Installation1090338
+Node: PC Compiling1092186
+Ref: PC Compiling-Footnote-11095185
+Node: PC Testing1095290
+Node: PC Using1096466
+Node: Cygwin1100624
+Node: MSYS1101433
+Node: VMS Installation1101947
+Node: VMS Compilation1102743
+Ref: VMS Compilation-Footnote-11103958
+Node: VMS Dynamic Extensions1104016
+Node: VMS Installation Details1105389
+Node: VMS Running1107635
+Node: VMS GNV1110469
+Node: VMS Old Gawk1111192
+Node: Bugs1111662
+Node: Other Versions1115666
+Node: Notes1121891
+Node: Compatibility Mode1122691
+Node: Additions1123473
+Node: Accessing The Source1124398
+Node: Adding Code1125834
+Node: New Ports1132012
+Node: Derived Files1136493
+Ref: Derived Files-Footnote-11141574
+Ref: Derived Files-Footnote-21141608
+Ref: Derived Files-Footnote-31142204
+Node: Future Extensions1142318
+Node: Implementation Limitations1142924
+Node: Extension Design1144172
+Node: Old Extension Problems1145326
+Ref: Old Extension Problems-Footnote-11146843
+Node: Extension New Mechanism Goals1146900
+Ref: Extension New Mechanism Goals-Footnote-11150261
+Node: Extension Other Design Decisions1150450
+Node: Extension Future Growth1152556
+Node: Old Extension Mechanism1153392
+Node: Basic Concepts1155132
+Node: Basic High Level1155813
+Ref: figure-general-flow1156085
+Ref: figure-process-flow1156684
+Ref: Basic High Level-Footnote-11159913
+Node: Basic Data Typing1160098
+Node: Glossary1163425
+Node: Copying1188577
+Node: GNU Free Documentation License1226133
+Node: Index1251269

End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index d6453c8b..ba6be294 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 c91820af..4efad7eb 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 23:11:18 +0000