Annotation of src/usr.bin/awk/FIXES, Revision 1.39
1.39 ! millert 1: /* $OpenBSD: FIXES,v 1.38 2020/08/11 16:57:05 millert Exp $ */
1.1 tholo 2: /****************************************************************
1.6 kstailey 3: Copyright (C) Lucent Technologies 1997
1.1 tholo 4: All Rights Reserved
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7: its documentation for any purpose and without fee is hereby
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1.6 kstailey 11: documentation, and that the name Lucent Technologies or any of
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1.1 tholo 24: ****************************************************************/
25:
26: This file lists all bug fixes, changes, etc., made since the AWK book
27: was sent to the printers in August, 1987.
1.39 ! millert 28:
! 29: December 8, 2020:
! 30: Merge PR #98: Disallow hex data. Allow only +nan, -nan,
! 31: +inf, -inf (case independent) to give NaN and infinity values.
! 32: Improve things so that string to double conversion is only
! 33: done once, yielding something of a speedup. This obviate
! 34: PR #95. Thanks to Arnold Robbins.
! 35:
! 36: December 3, 2020:
! 37: Fix to argument parsing to avoid printing spurious newlines.
! 38: Thanks to Todd Miller. Merges PR #97.
! 39:
! 40: October 13, 2020:
! 41: Add casts before all the calls to malloc/calloc/realloc in order
! 42: to get it to compile with g++. Thanks to Arnold Robbins.
! 43:
! 44: August 16, 2020:
! 45: Additional fixes for DJGPP. Thanks to Eli Zaretskii for
! 46: the testing.
1.38 millert 47:
48: August 7, 2020:
49: Merge PR #93, which adds casts to (void*) for debug prints
50: using the %p format specifier. Thanks to GitHub user YongHaoWu
51: ("Chris") for the fixes.
52:
53: August 4, 2020:
54: In run.c, use non-restartable multibyte routines to attain
55: portability to DJGPP. Should fix Issue 92. Thanks to Albert Wik
56: for the report and to Todd Miller for the suggested fix.
1.37 millert 57:
58: July 30, 2020:
59: Merge PRs 88-91 which fix small bugs. Thanks to Todd Miller and
60: Tim van der Molen for the fixes.
61:
62: In order to make life easier, we move exclusively to bison
63: as the parser generator.
1.36 millert 64:
65: July 2, 2020:
66: Merge PRs 85 and 86 which fix regressions. Thanks to
67: Tim van der Molen for the fixes.
1.35 millert 68:
69: June 25, 2020:
70: Merge PRs 82 and 84. The latter fixes issue #83. Thanks to
71: Todd Miller and awkfan77.
1.34 millert 72:
73: June 12, 2020:
74: Clear errno before calling errcheck to avoid any spurious errors
75: left over from previous calls that may have set it. Thanks to
76: Todd Miller for the fix, from PR #80.
77:
78: Fix Issue #78 by allowing \r to follow floating point numbers in
79: lib.c:is_number. Thanks to GitHub user ajcarr for the report
80: and to Arnold Robbins for the fix.
1.33 millert 81:
82: June 5, 2020:
83: In fldbld(), make sure that inputFS is set before trying to
84: use it. Thanks to Steffen Nurpmeso <steffen@sdaoden.eu>
85: for the report.
86:
87: May 5, 2020:
88: Fix checks for compilers that can handle noreturn. Thanks to
89: GitHub user enh-google for pointing it out. Closes Issue #79.
90:
91: April 16, 2020:
92: Handle old compilers that don't support C11 (for noreturn).
93: Thanks to Arnold Robbins.
94:
95: April 5, 2020:
96: Use <stdnoreturn.h> and noreturn instead of GCC attributes.
97: Thanks to GitHub user awkfan77. Closes PR #77.
1.30 millert 98:
1.32 millert 99: February 28, 2020:
100: More cleanups from Christos Zoulas: notably backslash continuation
101: inside strings removes the newline and a fix for RS = "^a".
102: Fix for address sanitizer-found problem. Thanks to GitHub user
103: enh-google.
104:
105: February 19, 2020:
106: More small cleanups from Christos Zoulas.
107:
108: February 18, 2020:
109: Additional cleanups from Christos Zoulas. It's no longer necessary
110: to use the -y flag to bison.
111:
112: February 6, 2020:
113: Additional small cleanups from Christos Zoulas. awk is now
114: a little more robust about reporting I/O errors upon exit.
115:
1.31 millert 116: January 31, 2020:
117: Merge PR #70, which avoids use of variable length arrays. Thanks
118: to GitHub user michaelforney. Fix issue #60 ({0} in interval
1.32 millert 119: expressions doesn't work). Also get all tests working again.
120: Thanks to Arnold Robbins.
1.31 millert 121:
122: January 24, 2020:
123: A number of small cleanups from Christos Zoulas. Add the close
124: on exec flag to files/pipes opened for redirection; courtesy of
125: Arnold Robbins.
126:
127: January 19, 2020:
128: If POSIXLY_CORRECT is set in the environment, then sub and gsub
129: use POSIX rules for multiple backslashes. This fixes Issue #66,
130: while maintaining backwards compatibility.
131:
132: January 9, 2020:
133: Input/output errors on closing files are now fatal instead of
134: mere warnings. Thanks to Martijn Dekker <martijn@inlv.org>.
135:
1.30 millert 136: January 5, 2020:
137: Fix a bug in the concatentation of two string constants into
138: one done in the grammar. Fixes GitHub issue #61. Thanks
139: to GitHub user awkfan77 for pointing out the direction for
140: the fix. New test T.concat added to the test suite.
141: Fix a few memory leaks reported by valgrind, as well.
142:
143: December 27, 2019:
144: Fix a bug whereby a{0,3} could match four a's. Thanks to
145: "Anonymous AWK fan" for the report.
146:
147: December 11, 2019:
148: Further printf-related fixes for 32 bit systems.
149: Thanks again to Christos Zoulas.
150:
151: December 8, 2019:
152: Fix the return value of sprintf("%d") on 32 bit systems.
153: Thanks to Jim Lowe for the report and to Christos Zoulas
154: for the fix.
1.29 millert 155:
156: November 10, 2019:
157: Convert a number of Boolean integer variables into
158: actual bools. Convert compile_time variable into an
159: enum and simplify some of the related code. Thanks
160: to Arnold Robbins.
161:
162: November 8, 2019:
163: Fix from Ori Bernstein to get UTF-8 characters instead of
164: bytes when FS = "". This is currently the only bit of
165: the One True Awk that understands multibyte characters.
166: From Arnold Robbins, apply some cleanups in the test suite.
1.28 millert 167:
168: October 25, 2019:
169: More fixes and cleanups from NetBSD, courtesy of Christos
170: Zoulas. Merges PRs 54 and 55.
171:
172: October 24, 2019:
173: Import second round of code cleanups from NetBSD. Much thanks
1.31 millert 174: to Christos Zoulas (GitHub user zoulasc). Merges PR 53.
1.28 millert 175: Add an optimization for string concatenation, also from
176: Christos.
1.27 millert 177:
178: October 17, 2019:
179: Import code cleanups from NetBSD. Much thanks to Christos
1.31 millert 180: Zoulas (GitHub user zoulasc). Merges PR 51.
1.26 millert 181:
182: October 6, 2019:
183: Import code from NetBSD awk that implements RS as a regular
184: expression.
1.23 millert 185:
1.25 millert 186: September 10, 2019:
187: Fixes for various array / memory overruns found via gcc's
1.31 millert 188: -fsanitize=unknown. Thanks to Alexander Richardson (GitHub
1.25 millert 189: user arichardson). Merges PRs 47 and 48.
190:
191: July 28, 2019:
192: Import grammar optimization from NetBSD: Two string constants
193: concatenated together get turned into a single string.
194:
195: July 26, 2019:
196: Support POSIX-specified C-style escape sequences "\a" (alarm)
197: and "\v" (vertical tab) in command line arguments and regular
198: expressions, further to the support for them in strings added on
199: Apr 9, 1989. These now no longer match as literal "a" and "v"
200: characters (as they don't on other awk implementations).
201: Thanks to Martijn Dekker.
202:
203: July 17, 2019:
204: Pull in a number of code cleanups and minor fixes from
205: Warner Losh's bsd-ota branch. The only user visible change
206: is the use of random(3) as the random number generator.
207: Thanks to Warner Losh for collecting all these fixes in
208: one easy place to get them from.
209:
210: July 16, 2019:
211: Fix field splitting to use FS value as of the time a record
212: was read or assigned to. Thanks to GitHub user Cody Mello (melloc)
213: for the fix. (Merged from his branch, via PR #42.) Updated
214: testdir/T.split per said PR as well.
215:
216: June 24, 2019:
217: Extract awktest.tar into testdir directory. Add some very
218: simple mechanics to the makefile for running the tests and
219: for cleaning up. No changes to awk itself.
220:
1.24 millert 221: June 17, 2019:
222: Disallow deleting SYMTAB and its elements, which creates
223: use-after-free bugs. Thanks to GitHub user Cody Mello (melloc)
224: for the fix. (Merged from PR #43.)
225:
226: June 5, 2019:
227: Allow unmatched right parenthesis in a regular expression to
228: be treated literally. Fixes Issue #40. Thanks to GitHub user
229: Warner Losh (bsdimp) for the report. Thanks to Arnold Robbins
230: for the fix.
231:
232: May 29,2019:
233: Fix check for command line arguments to no longer require that
234: first character after '=' not be another '='. Reverts change of
235: August 11, 1989. Thanks to GitHub user Jamie Landeg Jones for
236: pointing out the issue; from Issue #38.
237:
238: Apr 7, 2019:
239: Update awktest.tar(p.50) to use modern options to sort. Needed
240: for Android development. Thanks to GitHub user mohd-akram (Mohamed
241: Akram). From Issue #33.
242:
243: Mar 12, 2019:
244: Added very simplistic support for cross-compiling in the
245: makefile. We are NOT going to go in the direction of the
246: autotools, though. Thanks to GitHub user nee-san for
247: the basic change. (Merged from PR #34.)
248:
1.23 millert 249: Mar 5, 2019:
250: Added support for POSIX-standard interval expressions (a.k.a.
251: bounds, a.k.a. repetition expressions) in regular expressions,
252: backported (via NetBSD) from Apple awk-24 (20070501).
253: Thanks to Martijn Dekker <martijn@inlv.org> for the port.
254: (Merged from PR #30.)
255:
256: Mar 3, 2019:
257: Merge PRs as follows:
258: #12: Avoid undefined behaviour when using ctype(3) functions in
259: relex(). Thanks to GitHub user iamleot.
260: #31: Make getline handle numeric strings, and update FIXES. Thanks
1.24 millert 261: to GitHub user arnoldrobbins.
1.23 millert 262: #32: maketab: support build systems with read-only source. Thanks
263: to GitHub user enh.
1.22 millert 264:
265: Jan 25, 2019:
266: Make getline handle numeric strings properly in all cases.
267: (Thanks, Arnold.)
268:
269: Jan 21, 2019:
270: Merged a number of small fixes from GitHub pull requests.
271: Thanks to GitHub users Arnold Robbins (arnoldrobbins),
272: Cody Mello (melloc) and Christoph Junghans (junghans).
273: PR numbers: 13-21, 23, 24, 27.
1.21 millert 274:
275: Oct 25, 2018:
276: Added test in maketab.c to prevent generating a proctab entry
277: for YYSTYPE_IS_DEFINED. It was harmless but some gcc settings
278: generated a warning message. Thanks to Nan Xiao for report.
1.20 millert 279:
280: Aug 27, 2018:
281: Disallow '$' in printf formats; arguments evaluated in order
282: and printed in order.
283:
284: Added some casts to silence warnings on debugging printfs.
285: (Thanks, Arnold.)
1.18 millert 286:
1.19 millert 287: Aug 23, 2018:
288: A long list of fixes courtesy of Arnold Robbins,
289: to whom profound thanks.
290:
291: 1. ofs-rebuild: OFS value used to rebuild the record was incorrect.
292: Fixed August 19, 2014. Revised fix August 2018.
293:
294: 2. system-status: Instead of a floating-point division by 256, use
295: the wait(2) macros to create a reasonable exit status.
296: Fixed March 12, 2016.
297:
298: 3. space: Use provided xisblank() function instead of ispace() for
299: matching [[:blank:]].
300:
301: 4. a-format: Add POSIX standard %a and %A to supported formats. Check
302: at runtime that this format is available.
303:
304: 5. decr-NF: Decrementing NF did not change $0. This is a decades-old
305: bug. There are interactions with the old and new value of OFS as well.
306: Most of the fix came from the NetBSD awk.
307:
308: 6. string-conv: String conversions of scalars were sticky. Once a
309: conversion to string happened, even with OFMT, that value was used until
310: a new numeric value was assigned, even if OFMT differed from CONVFMT,
311: and also if CONVFMT changed.
312:
313: 7. unary-plus: Unary plus on a string constant returned the string.
314: Instead, it should convert the value to numeric and give that value.
315:
316: Also added Arnold's tests for these to awktest.tar as T.arnold.
317:
318: Aug 15, 2018:
319: fixed mangled awktest.tar (thanks, Arnold), posted all
320: current (very minor) fixes to github / onetrueawk
321:
1.18 millert 322: Jun 7, 2018:
323: (yes, a long layoff)
324: Updated some broken tests (beebe.tar, T.lilly)
325: [thanks to Arnold Robbins]
326:
327: Mar 26, 2015:
328: buffer overflow in error reporting; thanks to tobias ulmer
329: and john-mark gurney for spotting it and the fix.
330:
331: Feb 4, 2013:
332: cleaned up a handful of tests that didn't seem to actually
333: test for correct behavior: T.latin1, T.gawk.
334:
335: Jan 5, 2013:
336: added ,NULL initializer to static Cells in run.c; not really
337: needed but cleaner. Thanks to Michael Bombardieri.
1.17 millert 338:
339: Dec 20, 2012:
340: fiddled makefile to get correct yacc and bison flags. pick yacc
341: (linux) or bison (mac) as necessary.
342:
343: added __attribute__((__noreturn__)) to a couple of lines in
344: proto.h, to silence someone's enthusiastic checker.
345:
346: fixed obscure call by value bug in split(a[1],a) reported on
347: 9fans. the management of temporary values is just a mess; i
348: took a shortcut by making an extra string copy. thanks
349: to paul patience and arnold robbins for passing it on and for
350: proposed patches.
351:
352: tiny fiddle in setfval to eliminate -0 results in T.expr, which
353: has irritated me for 20+ years.
1.16 millert 354:
355: Aug 10, 2011:
356: another fix to avoid core dump with delete(ARGV); again, many thanks
357: to ruslan ermilov.
358:
359: Aug 7, 2011:
360: split(s, a, //) now behaves the same as split(s, a, "")
361:
362: Jun 12, 2011:
363: /pat/, \n /pat/ {...} is now legal, though bad style to use.
364:
365: added checks to new -v code that permits -vnospace; thanks to
1.25 millert 366: ruslan ermilov for spotting this and providing the patch.
1.16 millert 367:
368: removed fixed limit on number of open files; thanks to aleksey
1.25 millert 369: cheusov and christos zoulos.
1.16 millert 370:
371: fixed day 1 bug that resurrected deleted elements of ARGV when
372: used as filenames (in lib.c).
373:
374: minor type fiddles to make gcc -Wall -pedantic happier (but not
375: totally so); turned on -fno-strict-aliasing in makefile.
376:
377: May 6, 2011:
378: added #ifdef for isblank.
379: now allows -ffoo as well as -f foo arguments.
380: (thanks, ruslan)
381:
382: May 1, 2011:
383: after advice from todd miller, kevin lo, ruslan ermilov,
384: and arnold robbins, changed srand() to return the previous
385: seed (which is 1 on the first call of srand). the seed is
386: an Awkfloat internally though converted to unsigned int to
1.25 millert 387: pass to the library srand(). thanks, everyone.
1.16 millert 388:
389: fixed a subtle (and i hope low-probability) overflow error
1.25 millert 390: in fldbld, by adding space for one extra \0. thanks to
1.16 millert 391: robert bassett for spotting this one and providing a fix.
392:
393: removed the files related to compilation on windows. i no
394: longer have anything like a current windows environment, so
395: i can't test any of it.
1.15 millert 396:
397: May 23, 2010:
398: fixed long-standing overflow bug in run.c; many thanks to
399: nelson beebe for spotting it and providing the fix.
400:
401: fixed bug that didn't parse -vd=1 properly; thanks to santiago
402: vila for spotting it.
403:
404: Feb 8, 2010:
405: i give up. replaced isblank with isspace in b.c; there are
406: no consistent header files.
407:
408: Nov 26, 2009:
409: fixed a long-standing issue with when FS takes effect. a
410: change to FS is now noticed immediately for subsequent splits.
411:
412: changed the name getline() to awkgetline() to avoid yet another
413: name conflict somewhere.
414:
415: Feb 11, 2009:
416: temporarily for now defined HAS_ISBLANK, since that seems to
417: be the best way through the thicket. isblank arrived in C99,
418: but seems to be arriving at different systems at different
419: times.
420:
421: Oct 8, 2008:
422: fixed typo in b.c that set tmpvec wrongly. no one had ever
423: run into the problem, apparently. thanks to alistair crooks.
1.14 millert 424:
425: Oct 23, 2007:
426: minor fix in lib.c: increase inputFS to 100, change malloc
1.25 millert 427: for fields to n+1.
1.14 millert 428:
429: fixed memory fault caused by out of order test in setsval.
430:
431: thanks to david o'brien, freebsd, for both fixes.
432:
433: May 1, 2007:
434: fiddle in makefile to fix for BSD make; thanks to igor sobrado.
435:
436: Mar 31, 2007:
437: fixed some null pointer refs calling adjbuf.
438:
439: Feb 21, 2007:
440: fixed a bug in matching the null RE in sub and gsub. thanks to al aho
441: who actually did the fix (in b.c), and to wolfgang seeberg for finding
442: it and providing a very compact test case.
443:
444: fixed quotation in b.c; thanks to Hal Pratt and the Princeton Dante
445: Project.
446:
447: removed some no-effect asserts in run.c.
448:
449: fiddled maketab.c to not complain about bison-generated values.
450:
451: removed the obsolete -V argument; fixed --version to print the
452: version and exit.
453:
454: fixed wording and an outright error in the usage message; thanks to igor
455: sobrado and jason mcintyre.
456:
457: fixed a bug in -d that caused core dump if no program followed.
458:
459: Jan 1, 2007:
460: dropped mac.code from makefile; there are few non-MacOSX
461: mac's these days.
462:
463: Jan 17, 2006:
464: system() not flagged as unsafe in the unadvertised -safe option.
465: found it while enhancing tests before shipping the ;login: article.
466: practice what you preach.
467:
468: removed the 9-years-obsolete -mr and -mf flags.
469:
470: added -version and --version options.
471:
472: core dump on linux with BEGIN {nextfile}, now fixed.
473:
1.25 millert 474: removed some #ifdef's in run.c and lex.c that appear to no
1.14 millert 475: longer be necessary.
476:
477: Apr 24, 2005:
478: modified lib.c so that values of $0 et al are preserved in the END
479: block, apparently as required by posix. thanks to havard eidnes
480: for the report and code.
481:
482: Jan 14, 2005:
483: fixed infinite loop in parsing, originally found by brian tsang.
484: thanks to arnold robbins for a suggestion that started me
485: rethinking it.
486:
487: Dec 31, 2004:
1.25 millert 488: prevent overflow of -f array in main, head off potential error in
489: call of SYNTAX(), test malloc return in lib.c, all with thanks to
1.14 millert 490: todd miller.
1.13 millert 491:
492: Dec 22, 2004:
493: cranked up size of NCHARS; coverity thinks it can be overrun with
494: smaller size, and i think that's right. added some assertions to b.c
495: to catch places where it might overrun. the RE code is still fragile.
496:
497: Dec 5, 2004:
498: fixed a couple of overflow problems with ridiculous field numbers:
499: e.g., print $(2^32-1). thanks to ruslan ermilov, giorgos keramidas
500: and david o'brien at freebsd.org for patches. this really should
501: be re-done from scratch.
502:
503: Nov 21, 2004:
504: fixed another 25-year-old RE bug, in split. it's another failure
505: to (re-)initialize. thanks to steve fisher for spotting this and
506: providing a good test case.
507:
508: Nov 22, 2003:
509: fixed a bug in regular expressions that dates (so help me) from 1977;
510: it's been there from the beginning. an anchored longest match that
511: was longer than the number of states triggered a failure to initialize
512: the machine properly. many thanks to moinak ghosh for not only finding
513: this one but for providing a fix, in some of the most mysterious
514: code known to man.
515:
516: fixed a storage leak in call() that appears to have been there since
1.25 millert 517: 1983 or so -- a function without an explicit return that assigns a
518: string to a parameter leaked a Cell. thanks to moinak ghosh for
1.13 millert 519: spotting this very subtle one.
520:
521: Jul 31, 2003:
522: fixed, thanks to andrey chernov and ruslan ermilov, a bug in lex.c
523: that mis-handled the character 255 in input. (it was being compared
524: to EOF with a signed comparison.)
525:
526: Jul 29, 2003:
527: fixed (i think) the long-standing botch that included the beginning of
528: line state ^ for RE's in the set of valid characters; this led to a
529: variety of odd problems, including failure to properly match certain
530: regular expressions in non-US locales. thanks to ruslan for keeping
531: at this one.
532:
533: Jul 28, 2003:
534: n-th try at getting internationalization right, with thanks to volker
535: kiefel, arnold robbins and ruslan ermilov for advice, though they
536: should not be blamed for the outcome. according to posix, "." is the
537: radix character in programs and command line arguments regardless of
538: the locale; otherwise, the locale should prevail for input and output
539: of numbers. so it's intended to work that way.
1.25 millert 540:
1.13 millert 541: i have rescinded the attempt to use strcoll in expanding shorthands in
542: regular expressions (cclenter). its properties are much too
543: surprising; for example [a-c] matches aAbBc in locale en_US but abBcC
544: in locale fr_CA. i can see how this might arise by implementation
545: but i cannot explain it to a human user. (this behavior can be seen
546: in gawk as well; we're leaning on the same library.)
547:
548: the issue appears to be that strcoll is meant for sorting, where
549: merging upper and lower case may make sense (though note that unix
550: sort does not do this by default either). it is not appropriate
551: for regular expressions, where the goal is to match specific
552: patterns of characters. in any case, the notations [:lower:], etc.,
553: are available in awk, and they are more likely to work correctly in
554: most locales.
555:
556: a moratorium is hereby declared on internationalization changes.
557: i apologize to friends and colleagues in other parts of the world.
558: i would truly like to get this "right", but i don't know what
559: that is, and i do not want to keep making changes until it's clear.
560:
561: Jul 4, 2003:
562: fixed bug that permitted non-terminated RE, as in "awk /x".
563:
564: Jun 1, 2003:
565: subtle change to split: if source is empty, number of elems
566: is always 0 and the array is not set.
567:
568: Mar 21, 2003:
569: added some parens to isblank, in another attempt to make things
570: internationally portable.
571:
572: Mar 14, 2003:
573: the internationalization changes, somewhat modified, are now
574: reinstated. in theory awk will now do character comparisons
575: and case conversions in national language, but "." will always
576: be the decimal point separator on input and output regardless
577: of national language. isblank(){} has an #ifndef.
578:
579: this no longer compiles on windows: LC_MESSAGES isn't defined
580: in vc6++.
581:
582: fixed subtle behavior in field and record splitting: if FS is
583: a single character and RS is not empty, \n is NOT a separator.
584: this tortuous reading is found in the awk book; behavior now
585: matches gawk and mawk.
1.11 millert 586:
587: Dec 13, 2002:
588: for the moment, the internationalization changes of nov 29 are
589: rolled back -- programs like x = 1.2 don't work in some locales,
590: because the parser is expecting x = 1,2. until i understand this
591: better, this will have to wait.
592:
593: Nov 29, 2002:
594: modified b.c (with tiny changes in main and run) to support
595: locales, using strcoll and iswhatever tests for posix character
596: classes. thanks to ruslan ermilov (ru@freebsd.org) for code.
597: the function isblank doesn't seem to have propagated to any
598: header file near me, so it's there explicitly. not properly
599: tested on non-ascii character sets by me.
600:
601: Jun 28, 2002:
602: modified run/format() and tran/getsval() to do a slightly better
603: job on using OFMT for output from print and CONVFMT for other
1.25 millert 604: number->string conversions, as promised by posix and done by
1.11 millert 605: gawk and mawk. there are still places where it doesn't work
606: right if CONVFMT is changed; by then the STR attribute of the
607: variable has been irrevocably set. thanks to arnold robbins for
608: code and examples.
609:
610: fixed subtle bug in format that could get core dump. thanks to
611: Jaromir Dolecek <jdolecek@NetBSD.org> for finding and fixing.
612: minor cleanup in run.c / format() at the same time.
613:
614: added some tests for null pointers to debugging printf's, which
615: were never intended for external consumption. thanks to dave
616: kerns (dkerns@lucent.com) for pointing this out.
617:
618: GNU compatibility: an empty regexp matches anything (thanks to
619: dag-erling smorgrav, des@ofug.org). subject to reversion if
620: this does more harm than good.
621:
622: pervasive small changes to make things more const-correct, as
623: reported by gcc's -Wwrite-strings. as it says in the gcc manual,
624: this may be more nuisance than useful. provoked by a suggestion
625: and code from arnaud desitter, arnaud@nimbus.geog.ox.ac.uk
626:
627: minor documentation changes to note that this now compiles out
628: of the box on Mac OS X.
629:
630: Feb 10, 2002:
631: changed types in posix chars structure to quiet solaris cc.
632:
633: Jan 1, 2002:
634: fflush() or fflush("") flushes all files and pipes.
635:
1.25 millert 636: length(arrayname) returns number of elements; thanks to
1.11 millert 637: arnold robbins for suggestion.
638:
639: added a makefile.win to make it easier to build on windows.
640: based on dan allen's buildwin.bat.
641:
642: Nov 16, 2001:
643: added support for posix character class names like [:digit:],
644: which are not exactly shorter than [0-9] and perhaps no more
645: portable. thanks to dag-erling smorgrav for code.
646:
647: Feb 16, 2001:
648: removed -m option; no longer needed, and it was actually
649: broken (noted thanks to volker kiefel).
650:
651: Feb 10, 2001:
652: fixed an appalling bug in gettok: any sequence of digits, +,-, E, e,
653: and period was accepted as a valid number if it started with a period.
654: this would never have happened with the lex version.
655:
656: other 1-character botches, now fixed, include a bare $ and a
657: bare " at the end of the input.
658:
659: Feb 7, 2001:
660: more (const char *) casts in b.c and tran.c to silence warnings.
1.8 millert 661:
1.10 millert 662: Nov 15, 2000:
663: fixed a bug introduced in august 1997 that caused expressions
664: like $f[1] to be syntax errors. thanks to arnold robbins for
665: noticing this and providing a fix.
666:
667: Oct 30, 2000:
668: fixed some nextfile bugs: not handling all cases. thanks to
669: arnold robbins for pointing this out. new regressions added.
670:
671: close() is now a function. it returns whatever the library
672: fclose returns, and -1 for closing a file or pipe that wasn't
673: opened.
674:
675: Sep 24, 2000:
676: permit \n explicitly in character classes; won't work right
677: if comes in as "[\n]" but ok as /[\n]/, because of multiple
678: processing of \'s. thanks to arnold robbins.
679:
680: July 5, 2000:
681: minor fiddles in tran.c to keep compilers happy about uschar.
682: thanks to norman wilson.
683:
684: May 25, 2000:
685: yet another attempt at making 8-bit input work, with another
1.25 millert 686: band-aid in b.c (member()), and some (uschar) casts to head
1.10 millert 687: off potential errors in subscripts (like isdigit). also
688: changed HAT to NCHARS-2. thanks again to santiago vila.
689:
690: changed maketab.c to ignore apparently out of range definitions
691: instead of halting; new freeBSD generates one. thanks to
692: jon snader <jsnader@ix.netcom.com> for pointing out the problem.
693:
694: May 2, 2000:
695: fixed an 8-bit problem in b.c by making several char*'s into
696: unsigned char*'s. not clear i have them all yet. thanks to
697: Santiago Vila <sanvila@unex.es> for the bug report.
698:
699: Apr 21, 2000:
700: finally found and fixed a memory leak in function call; it's
701: been there since functions were added ~1983. thanks to
702: jon bentley for the test case that found it.
703:
704: added test in envinit to catch environment "variables" with
1.12 otto 705: names beginning with '='; thanks to Berend Hasselman.
1.10 millert 706:
707: Jul 28, 1999:
708: added test in defn() to catch function foo(foo), which
709: otherwise recurses until core dump. thanks to arnold
710: robbins for noticing this.
711:
1.9 millert 712: Jun 20, 1999:
713: added *bp in gettok in lex.c; appears possible to exit function
714: without terminating the string. thanks to russ cox.
715:
716: Jun 2, 1999:
717: added function stdinit() to run to initialize files[] array,
718: in case stdin, etc., are not constants; some compilers care.
719:
720: May 10, 1999:
721: replaced the ERROR ... FATAL, etc., macros with functions
722: based on vprintf, to avoid problems caused by overrunning
723: fixed-size errbuf array. thanks to ralph corderoy for the
724: impetus, and for pointing out a string termination bug in
725: qstring as well.
726:
727: Apr 21, 1999:
728: fixed bug that caused occasional core dumps with commandline
729: variable with value ending in \. (thanks to nelson beebe for
730: the test case.)
731:
1.8 millert 732: Apr 16, 1999:
1.25 millert 733: with code kindly provided by Bruce Lilly, awk now parses
1.8 millert 734: /=/ and similar constructs more sensibly in more places.
1.10 millert 735: Bruce also provided some helpful test cases.
1.8 millert 736:
737: Apr 5, 1999:
738: changed true/false to True/False in run.c to make it
739: easier to compile with C++. Added some casts on malloc
740: and realloc to be honest about casts; ditto. changed
741: ltype int to long in struct rrow to reduce some 64-bit
742: complaints; other changes scattered throughout for the
743: same purpose. thanks to Nelson Beebe for these portability
744: improvements.
745:
746: removed some horrible pointer-int casting in b.c and elsewhere
747: by adding ptoi and itonp to localize the casts, which are
748: all benign. fixed one incipient bug that showed up on sgi
749: in 64-bit mode.
750:
751: reset lineno for new source file; include filename in error
752: message. also fixed line number error in continuation lines.
753: (thanks to Nelson Beebe for both of these.)
754:
755: Mar 24, 1999:
756: Nelson Beebe notes that irix 5.3 yacc dies with a bogus
757: error; use a newer version or switch to bison, since sgi
758: is unlikely to fix it.
1.1 tholo 759:
1.7 millert 760: Mar 5, 1999:
1.9 millert 761: changed isnumber to is_number to avoid the problem caused by
762: versions of ctype.h that include the name isnumber.
1.7 millert 763:
764: distribution now includes a script for building on a Mac,
765: thanks to Dan Allen.
766:
767: Feb 20, 1999:
768: fixed memory leaks in run.c (call) and tran.c (setfval).
769: thanks to Stephen Nutt for finding these and providing the fixes.
770:
771: Jan 13, 1999:
772: replaced srand argument by (unsigned int) in run.c;
773: avoids problem on Mac and potentially on Unix & Windows.
774: thanks to Dan Allen.
775:
776: added a few (int) casts to silence useless compiler warnings.
777: e.g., errorflag= in run.c jump().
778:
779: added proctab.c to the bundle outout; one less thing
780: to have to compile out of the box.
781:
782: added calls to _popen and _pclose to the win95 stub for
783: pipes (thanks to Steve Adams for this helpful suggestion).
784: seems to work, though properties are not well understood
785: by me, and it appears that under some circumstances the
786: pipe output is truncated. Be careful.
787:
788: Oct 19, 1998:
789: fixed a couple of bugs in getrec: could fail to update $0
1.25 millert 790: after a getline var; because inputFS wasn't initialized,
1.7 millert 791: could split $0 on every character, a misleading diversion.
792:
793: fixed caching bug in makedfa: LRU was actually removing
794: least often used.
795:
796: thanks to ross ridge for finding these, and for providing
797: great bug reports.
798:
799: May 12, 1998:
800: fixed potential bug in readrec: might fail to update record
801: pointer after growing. thanks to dan levy for spotting this
802: and suggesting the fix.
803:
804: Mar 12, 1998:
805: added -V to print version number and die.
1.19 millert 806:
807: [notify dave kerns, dkerns@dacsoup.ih.lucent.com]
1.7 millert 808:
809: Feb 11, 1998:
810: subtle silent bug in lex.c: if the program ended with a number
811: longer than 1 digit, part of the input would be pushed back and
812: parsed again because token buffer wasn't terminated right.
813: example: awk 'length($0) > 10'. blush. at least i found it
814: myself.
815:
816: Aug 31, 1997:
817: s/adelete/awkdelete/: SGI uses this in malloc.h.
818: thanks to nelson beebe for pointing this one out.
819:
820: Aug 21, 1997:
821: fixed some bugs in sub and gsub when replacement includes \\.
822: this is a dark, horrible corner, but at least now i believe that
823: the behavior is the same as gawk and the intended posix standard.
824: thanks to arnold robbins for advice here.
825:
826: Aug 9, 1997:
827: somewhat regretfully, replaced the ancient lex-based lexical
828: analyzer with one written in C. it's longer, generates less code,
829: and more portable; the old one depended too much on mysterious
830: properties of lex that were not preserved in other environments.
831: in theory these recognize the same language.
832:
833: now using strtod to test whether a string is a number, instead of
834: the convoluted original function. should be more portable and
835: reliable if strtod is implemented right.
836:
837: removed now-pointless optimization in makefile that tries to avoid
838: recompilation when awkgram.y is changed but symbols are not.
839:
840: removed most fixed-size arrays, though a handful remain, some
841: of which are unchecked. you have been warned.
842:
843: Aug 4, 1997:
844: with some trepidation, replaced the ancient code that managed
845: fields and $0 in fixed-size arrays with arrays that grow on
846: demand. there is still some tension between trying to make this
847: run fast and making it clean; not sure it's right yet.
848:
849: the ill-conceived -mr and -mf arguments are now useful only
850: for debugging. previous dynamic string code removed.
851:
852: numerous other minor cleanups along the way.
1.1 tholo 853:
1.7 millert 854: Jul 30, 1997:
855: using code provided by dan levy (to whom profuse thanks), replaced
856: fixed-size arrays and awkward kludges by a fairly uniform mechanism
857: to grow arrays as needed for printf, sub, gsub, etc.
1.1 tholo 858:
1.7 millert 859: Jul 23, 1997:
860: falling off the end of a function returns "" and 0, not 0.
861: thanks to arnold robbins.
1.1 tholo 862:
1.7 millert 863: Jun 17, 1997:
864: replaced several fixed-size arrays by dynamically-created ones
865: in run.c; added overflow tests to some previously unchecked cases.
866: getline, toupper, tolower.
1.1 tholo 867:
1.7 millert 868: getline code is still broken in that recursive calls may wind
869: up using the same space. [fixed later]
1.1 tholo 870:
1.7 millert 871: increased RECSIZE to 8192 to push problems further over the horizon.
1.1 tholo 872:
1.7 millert 873: added \r to \n as input line separator for programs, not data.
874: damn CRLFs.
1.1 tholo 875:
1.7 millert 876: modified format() to permit explicit printf("%c", 0) to include
877: a null byte in output. thanks to ken stailey for the fix.
1.1 tholo 878:
1.7 millert 879: added a "-safe" argument that disables file output (print >,
880: print >>), process creation (cmd|getline, print |, system), and
881: access to the environment (ENVIRON). this is a first approximation
882: to a "safe" version of awk, but don't rely on it too much. thanks
883: to joan feigenbaum and matt blaze for the inspiration long ago.
1.1 tholo 884:
1.7 millert 885: Jul 8, 1996:
886: fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to
887: ralph corderoy.
1.1 tholo 888:
1.7 millert 889: Jun 29, 1996:
890: fixed awful bug in new field splitting; didn't get all the places
891: where input was done.
1.1 tholo 892:
1.7 millert 893: Jun 28, 1996:
894: changed field-splitting to conform to posix definition: fields are
895: split using the value of FS at the time of input; it used to be
896: the value when the field or NF was first referred to, a much less
897: predictable definition. thanks to arnold robbins for encouragement
898: to do the right thing.
1.1 tholo 899:
1.7 millert 900: May 28, 1996:
901: fixed appalling but apparently unimportant bug in parsing octal
902: numbers in reg exprs.
1.1 tholo 903:
1.7 millert 904: explicit hex in reg exprs now limited to 2 chars: \xa, \xaa.
1.1 tholo 905:
1.7 millert 906: May 27, 1996:
907: cleaned up some declarations so gcc -Wall is now almost silent.
1.1 tholo 908:
1.7 millert 909: makefile now includes backup copies of ytab.c and lexyy.c in case
910: one makes before looking; it also avoids recreating lexyy.c unless
911: really needed.
1.1 tholo 912:
1.7 millert 913: s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes
914: with unwisely-written header files.
1.1 tholo 915:
1.7 millert 916: thanks to jeffrey friedl for several of these.
1.1 tholo 917:
1.7 millert 918: May 26, 1996:
919: an attempt to rationalize the (unsigned) char issue. almost all
920: instances of unsigned char have been removed; the handful of places
921: in b.c where chars are used as table indices have been hand-crafted.
922: added some latin-1 tests to the regression, but i'm not confident;
923: none of my compilers seem to care much. thanks to nelson beebe for
924: pointing out some others that do care.
1.1 tholo 925:
1.7 millert 926: May 2, 1996:
927: removed all register declarations.
1.1 tholo 928:
1.7 millert 929: enhanced split(), as in gawk, etc: split(s, a, "") splits s into
930: a[1]...a[length(s)] with each character a single element.
1.1 tholo 931:
1.7 millert 932: made the same changes for field-splitting if FS is "".
1.1 tholo 933:
1.7 millert 934: added nextfile, as in gawk: causes immediate advance to next
935: input file. (thanks to arnold robbins for inspiration and code).
1.1 tholo 936:
1.7 millert 937: small fixes to regexpr code: can now handle []], [[], and
1.25 millert 938: variants; [] is now a syntax error, rather than matching
1.7 millert 939: everything; [z-a] is now empty, not z. far from complete
940: or correct, however. (thanks to jeffrey friedl for pointing out
941: some awful behaviors.)
1.1 tholo 942:
1.7 millert 943: Apr 29, 1996:
1.12 otto 944: replaced uchar by uschar everywhere; apparently some compilers
1.7 millert 945: usurp this name and this causes conflicts.
1.1 tholo 946:
1.7 millert 947: fixed call to time in run.c (bltin); arg is time_t *.
1.1 tholo 948:
1.7 millert 949: replaced horrible pointer/long punning in b.c by a legitimate
950: union. should be safer on 64-bit machines and cleaner everywhere.
951: (thanks to nelson beebe for pointing out some of these problems.)
1.1 tholo 952:
1.7 millert 953: replaced nested comments by #if 0...#endif in run.c, lib.c.
1.1 tholo 954:
1.7 millert 955: removed getsval, setsval, execute macros from run.c and lib.c.
956: machines are 100x faster than they were when these macros were
957: first used.
1.1 tholo 958:
1.7 millert 959: revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l,
960: y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of
961: portability to nameless systems.
1.1 tholo 962:
1.7 millert 963: "make bundle" now includes yacc and lex output files for recipients
964: who don't have yacc or lex.
1.1 tholo 965:
1.7 millert 966: Aug 15, 1995:
967: initialized Cells in setsymtab more carefully; some fields
968: were not set. (thanks to purify, all of whose complaints i
969: think i now understand.)
1.1 tholo 970:
1.7 millert 971: fixed at least one error in gsub that looked at -1-th element
972: of an array when substituting for a null match (e.g., $).
1.1 tholo 973:
1.7 millert 974: delete arrayname is now legal; it clears the elements but leaves
975: the array, which may not be the right behavior.
1.1 tholo 976:
1.7 millert 977: modified makefile: my current make can't cope with the test used
978: to avoid unnecessary yacc invocations.
1.1 tholo 979:
1.7 millert 980: Jul 17, 1995:
981: added dynamically growing strings to awk.lx.l and b.c
982: to permit regular expressions to be much bigger.
983: the state arrays can still overflow.
1.1 tholo 984:
1.7 millert 985: Aug 24, 1994:
986: detect duplicate arguments in function definitions (mdm).
1.1 tholo 987:
1.7 millert 988: May 11, 1994:
989: trivial fix to printf to limit string size in sub().
1.1 tholo 990:
1.7 millert 991: Apr 22, 1994:
992: fixed yet another subtle self-assignment problem:
993: $1 = $2; $1 = $1 clobbered $1.
1.1 tholo 994:
1.7 millert 995: Regression tests now use private echo, to avoid quoting problems.
1.1 tholo 996:
1.7 millert 997: Feb 2, 1994:
998: changed error() to print line number as %d, not %g.
1.1 tholo 999:
1.7 millert 1000: Jul 23, 1993:
1001: cosmetic changes: increased sizes of some arrays,
1002: reworded some error messages.
1.1 tholo 1003:
1.7 millert 1004: added CONVFMT as in posix (just replaced OFMT in getsval)
1.1 tholo 1005:
1.7 millert 1006: FILENAME is now "" until the first thing that causes a file
1007: to be opened.
1.1 tholo 1008:
1.7 millert 1009: Nov 28, 1992:
1010: deleted yyunput and yyoutput from proto.h;
1011: different versions of lex give these different declarations.
1.1 tholo 1012:
1.7 millert 1013: May 31, 1992:
1014: added -mr N and -mf N options: more record and fields.
1015: these really ought to adjust automatically.
1.1 tholo 1016:
1.7 millert 1017: cleaned up some error messages; "out of space" now means
1018: malloc returned NULL in all cases.
1.1 tholo 1019:
1.7 millert 1020: changed rehash so that if it runs out, it just returns;
1021: things will continue to run slow, but maybe a bit longer.
1.1 tholo 1022:
1.7 millert 1023: Apr 24, 1992:
1024: remove redundant close of stdin when using -f -.
1.1 tholo 1025:
1.7 millert 1026: got rid of core dump with -d; awk -d just prints date.
1.1 tholo 1027:
1.7 millert 1028: Apr 12, 1992:
1029: added explicit check for /dev/std(in,out,err) in redirection.
1030: unlike gawk, no /dev/fd/n yet.
1.1 tholo 1031:
1.7 millert 1032: added (file/pipe) builtin. hard to test satisfactorily.
1033: not posix.
1.1 tholo 1034:
1.7 millert 1035: Feb 20, 1992:
1036: recompile after abortive changes; should be unchanged.
1.1 tholo 1037:
1.7 millert 1038: Dec 2, 1991:
1039: die-casting time: converted to ansi C, installed that.
1.1 tholo 1040:
1.7 millert 1041: Nov 30, 1991:
1042: fixed storage leak in freefa, failing to recover [N]CCL.
1043: thanks to Bill Jones (jones@cs.usask.ca)
1.1 tholo 1044:
1.7 millert 1045: Nov 19, 1991:
1046: use RAND_MAX instead of literal in builtin().
1.1 tholo 1047:
1.7 millert 1048: Nov 12, 1991:
1049: cranked up some fixed-size arrays in b.c, and added a test for
1050: overflow in penter. thanks to mark larsen.
1.1 tholo 1051:
1.7 millert 1052: Sep 24, 1991:
1053: increased buffer in gsub. a very crude fix to a general problem.
1054: and again on Sep 26.
1.1 tholo 1055:
1.7 millert 1056: Aug 18, 1991:
1057: enforce variable name syntax for commandline variables: has to
1058: start with letter or _.
1.1 tholo 1059:
1.7 millert 1060: Jul 27, 1991:
1061: allow newline after ; in for statements.
1.1 tholo 1062:
1.7 millert 1063: Jul 21, 1991:
1064: fixed so that in self-assignment like $1=$1, side effects
1065: like recomputing $0 take place. (this is getting subtle.)
1.1 tholo 1066:
1.7 millert 1067: Jun 30, 1991:
1068: better test for detecting too-long output record.
1.1 tholo 1069:
1.7 millert 1070: Jun 2, 1991:
1071: better defense against very long printf strings.
1072: made break and continue illegal outside of loops.
1.1 tholo 1073:
1.7 millert 1074: May 13, 1991:
1075: removed extra arg on gettemp, tempfree. minor error message rewording.
1.1 tholo 1076:
1077: May 6, 1991:
1078: fixed silly bug in hex parsing in hexstr().
1079: removed an apparently unnecessary test in isnumber().
1080: warn about weird printf conversions.
1081: fixed unchecked array overwrite in relex().
1082:
1083: changed for (i in array) to access elements in sorted order.
1084: then unchanged it -- it really does run slower in too many cases.
1085: left the code in place, commented out.
1086:
1.7 millert 1087: Feb 10, 1991:
1088: check error status on all writes, to avoid banging on full disks.
1.1 tholo 1089:
1.7 millert 1090: Jan 28, 1991:
1091: awk -f - reads the program from stdin.
1.1 tholo 1092:
1.7 millert 1093: Jan 11, 1991:
1094: failed to set numeric state on $0 in cmd|getline context in run.c.
1.1 tholo 1095:
1.7 millert 1096: Nov 2, 1990:
1097: fixed sleazy test for integrality in getsval; use modf.
1.1 tholo 1098:
1.7 millert 1099: Oct 29, 1990:
1100: fixed sleazy buggy code in lib.c that looked (incorrectly) for
1101: too long input lines.
1.1 tholo 1102:
1.7 millert 1103: Oct 14, 1990:
1104: fixed the bug on p. 198 in which it couldn't deduce that an
1105: argument was an array in some contexts. replaced the error
1106: message in intest() by code that damn well makes it an array.
1.1 tholo 1107:
1.7 millert 1108: Oct 8, 1990:
1109: fixed horrible bug: types and values were not preserved in
1110: some kinds of self-assignment. (in assign().)
1.1 tholo 1111:
1.7 millert 1112: Aug 24, 1990:
1113: changed NCHARS to 256 to handle 8-bit characters in strings
1114: presented to match(), etc.
1.1 tholo 1115:
1.7 millert 1116: Jun 26, 1990:
1117: changed struct rrow (awk.h) to use long instead of int for lval,
1118: since cfoll() stores a pointer in it. now works better when int's
1119: are smaller than pointers!
1.1 tholo 1120:
1.7 millert 1121: May 6, 1990:
1122: AVA fixed the grammar so that ! is uniformly of the same precedence as
1123: unary + and -. This renders illegal some constructs like !x=y, which
1124: now has to be parenthesized as !(x=y), and makes others work properly:
1125: !x+y is (!x)+y, and x!y is x !y, not two pattern-action statements.
1126: (These problems were pointed out by Bob Lenk of Posix.)
1.1 tholo 1127:
1.7 millert 1128: Added \x to regular expressions (already in strings).
1129: Limited octal to octal digits; \8 and \9 are not octal.
1130: Centralized the code for parsing escapes in regular expressions.
1131: Added a bunch of tests to T.re and T.sub to verify some of this.
1.1 tholo 1132:
1.7 millert 1133: Feb 9, 1990:
1134: fixed null pointer dereference bug in main.c: -F[nothing]. sigh.
1.1 tholo 1135:
1.7 millert 1136: restored srand behavior: it returns the current seed.
1.1 tholo 1137:
1.7 millert 1138: Jan 18, 1990:
1139: srand now returns previous seed value (0 to start).
1.1 tholo 1140:
1.7 millert 1141: Jan 5, 1990:
1142: fix potential problem in tran.c -- something was freed,
1143: then used in freesymtab.
1.1 tholo 1144:
1.7 millert 1145: Oct 18, 1989:
1146: another try to get the max number of open files set with
1147: relatively machine-independent code.
1.1 tholo 1148:
1.7 millert 1149: small fix to input() in case of multiple reads after EOF.
1.1 tholo 1150:
1.7 millert 1151: Oct 11, 1989:
1152: FILENAME is now defined in the BEGIN block -- too many old
1153: programs broke.
1.1 tholo 1154:
1.7 millert 1155: "-" means stdin in getline as well as on the commandline.
1.1 tholo 1156:
1.7 millert 1157: added a bunch of casts to the code to tell the truth about
1158: char * vs. unsigned char *, a right royal pain. added a
1159: setlocale call to the front of main, though probably no one
1160: has it usefully implemented yet.
1.1 tholo 1161:
1.7 millert 1162: Aug 24, 1989:
1163: removed redundant relational tests against nullnode if parse
1164: tree already had a relational at that point.
1.1 tholo 1165:
1.7 millert 1166: Aug 11, 1989:
1167: fixed bug: commandline variable assignment has to look like
1168: var=something. (consider the man page for =, in file =.1)
1.1 tholo 1169:
1.7 millert 1170: changed number of arguments to functions to static arrays
1171: to avoid repeated malloc calls.
1.1 tholo 1172:
1.7 millert 1173: Aug 2, 1989:
1174: restored -F (space) separator
1.1 tholo 1175:
1.7 millert 1176: Jul 30, 1989:
1177: added -v x=1 y=2 ... for immediate commandline variable assignment;
1178: done before the BEGIN block for sure. they have to precede the
1179: program if the program is on the commandline.
1180: Modified Aug 2 to require a separate -v for each assignment.
1.1 tholo 1181:
1.7 millert 1182: Jul 10, 1989:
1183: fixed ref-thru-zero bug in environment code in tran.c
1.1 tholo 1184:
1.7 millert 1185: Jun 23, 1989:
1186: add newline to usage message.
1.1 tholo 1187:
1.7 millert 1188: Jun 14, 1989:
1189: added some missing ansi printf conversion letters: %i %X %E %G.
1190: no sensible meaning for h or L, so they may not do what one expects.
1.1 tholo 1191:
1.7 millert 1192: made %* conversions work.
1.1 tholo 1193:
1.7 millert 1194: changed x^y so that if n is a positive integer, it's done
1195: by explicit multiplication, thus achieving maximum accuracy.
1196: (this should be done by pow() but it seems not to be locally.)
1197: done to x ^= y as well.
1.1 tholo 1198:
1.7 millert 1199: Jun 4, 1989:
1200: ENVIRON array contains environment: if shell variable V=thing,
1201: ENVIRON["V"] is "thing"
1.1 tholo 1202:
1.7 millert 1203: multiple -f arguments permitted. error reporting is naive.
1204: (they were permitted before, but only the last was used.)
1.1 tholo 1205:
1.7 millert 1206: fixed a really stupid botch in the debugging macro dprintf
1.1 tholo 1207:
1.7 millert 1208: fixed order of evaluation of commandline assignments to match
1209: what the book claims: an argument of the form x=e is evaluated
1210: at the time it would have been opened if it were a filename (p 63).
1211: this invalidates the suggested answer to ex 4-1 (p 195).
1.1 tholo 1212:
1.7 millert 1213: removed some code that permitted -F (space) fieldseparator,
1214: since it didn't quite work right anyway. (restored aug 2)
1.1 tholo 1215:
1.7 millert 1216: Apr 27, 1989:
1217: Line number now accumulated correctly for comment lines.
1.1 tholo 1218:
1.7 millert 1219: Apr 26, 1989:
1220: Debugging output now includes a version date,
1221: if one compiles it into the source each time.
1.1 tholo 1222:
1.7 millert 1223: Apr 9, 1989:
1224: Changed grammar to prohibit constants as 3rd arg of sub and gsub;
1225: prevents class of overwriting-a-constant errors. (Last one?)
1226: This invalidates the "banana" example on page 43 of the book.
1.1 tholo 1227:
1.7 millert 1228: Added \a ("alert"), \v (vertical tab), \xhhh (hexadecimal),
1229: as in ANSI, for strings. Rescinded the sloppiness that permitted
1230: non-octal digits in \ooo. Warning: not all compilers and libraries
1231: will be able to deal with \x correctly.
1.1 tholo 1232:
1.7 millert 1233: Jan 9, 1989:
1234: Fixed bug that caused tempcell list to contain a duplicate.
1235: The fix is kludgy.
1.1 tholo 1236:
1.7 millert 1237: Dec 17, 1988:
1238: Catches some more commandline errors in main.
1239: Removed redundant decl of modf in run.c (confuses some compilers).
1240: Warning: there's no single declaration of malloc, etc., in awk.h
1241: that seems to satisfy all compilers.
1.1 tholo 1242:
1.7 millert 1243: Dec 7, 1988:
1244: Added a bit of code to error printing to avoid printing nulls.
1245: (Not clear that it actually would.)
1.1 tholo 1246:
1.7 millert 1247: Nov 27, 1988:
1248: With fear and trembling, modified the grammar to permit
1249: multiple pattern-action statements on one line without
1250: an explicit separator. By definition, this capitulation
1251: to the ghost of ancient implementations remains undefined
1252: and thus subject to change without notice or apology.
1253: DO NOT COUNT ON IT.
1.1 tholo 1254:
1.7 millert 1255: Oct 30, 1988:
1256: Fixed bug in call() that failed to recover storage.
1.1 tholo 1257:
1.7 millert 1258: A warning is now generated if there are more arguments
1259: in the call than in the definition (in lieu of fixing
1260: another storage leak).
1.2 millert 1261:
1.7 millert 1262: Oct 20, 1988:
1263: Fixed %c: if expr is numeric, use numeric value;
1264: otherwise print 1st char of string value. still
1265: doesn't work if the value is 0 -- won't print \0.
1.2 millert 1266:
1.7 millert 1267: Added a few more checks for running out of malloc.
1.2 millert 1268:
1.7 millert 1269: Oct 12, 1988:
1270: Fixed bug in call() that freed local arrays twice.
1.5 kstailey 1271:
1.7 millert 1272: Fixed to handle deletion of non-existent array right;
1273: complains about attempt to delete non-array element.
1.6 kstailey 1274:
1.7 millert 1275: Sep 30, 1988:
1276: Now guarantees to evaluate all arguments of built-in
1277: functions, as in C; the appearance is that arguments
1278: are evaluated before the function is called. Places
1279: affected are sub (gsub was ok), substr, printf, and
1280: all the built-in arithmetic functions in bltin().
1281: A warning is generated if a bltin() is called with
1282: the wrong number of arguments.
1.6 kstailey 1283:
1.7 millert 1284: This requires changing makeprof on p167 of the book.
1.6 kstailey 1285:
1.7 millert 1286: Aug 23, 1988:
1287: setting FILENAME in BEGIN caused core dump, apparently
1288: because it was freeing space not allocated by malloc.
1.6 kstailey 1289:
1.7 millert 1290: July 24, 1988:
1291: fixed egregious error in toupper/tolower functions.
1292: still subject to rescinding, however.
1.6 kstailey 1293:
1.7 millert 1294: July 2, 1988:
1295: flush stdout before opening file or pipe
1.6 kstailey 1296:
1.7 millert 1297: July 2, 1988:
1298: performance bug in b.c/cgoto(): not freeing some sets of states.
1299: partial fix only right now, and the number of states increased
1300: to make it less obvious.
1.6 kstailey 1301:
1.7 millert 1302: June 1, 1988:
1303: check error status on close
1.6 kstailey 1304:
1.7 millert 1305: May 28, 1988:
1306: srand returns seed value it's using.
1307: see 1/18/90
1.6 kstailey 1308:
1.7 millert 1309: May 22, 1988:
1310: Removed limit on depth of function calls.
1.6 kstailey 1311:
1.7 millert 1312: May 10, 1988:
1313: Fixed lib.c to permit _ in commandline variable names.
1.6 kstailey 1314:
1.7 millert 1315: Mar 25, 1988:
1316: main.c fixed to recognize -- as terminator of command-
1317: line options. Illegal options flagged.
1318: Error reporting slightly cleaned up.
1.6 kstailey 1319:
1.7 millert 1320: Dec 2, 1987:
1321: Newer C compilers apply a strict scope rule to extern
1322: declarations within functions. Two extern declarations in
1323: lib.c and tran.c have been moved to obviate this problem.
1.6 kstailey 1324:
1.7 millert 1325: Oct xx, 1987:
1326: Reluctantly added toupper and tolower functions.
1327: Subject to rescinding without notice.
1.6 kstailey 1328:
1.7 millert 1329: Sep 17, 1987:
1330: Error-message printer had printf(s) instead of
1331: printf("%s",s); got core dumps when the message
1332: included a %.
1.6 kstailey 1333:
1.7 millert 1334: Sep 12, 1987:
1335: Very long printf strings caused core dump;
1336: fixed aprintf, asprintf, format to catch them.
1337: Can still get a core dump in printf itself.
1.6 kstailey 1338:
1339:
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