Annotation of src/usr.bin/awk/FIXES.1e, Revision 1.1
1.1 ! millert 1: /****************************************************************
! 2: Copyright (C) Lucent Technologies 1997
! 3: All Rights Reserved
! 4:
! 5: Permission to use, copy, modify, and distribute this software and
! 6: its documentation for any purpose and without fee is hereby
! 7: granted, provided that the above copyright notice appear in all
! 8: copies and that both that the copyright notice and this
! 9: permission notice and warranty disclaimer appear in supporting
! 10: documentation, and that the name Lucent Technologies or any of
! 11: its entities not be used in advertising or publicity pertaining
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! 14:
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! 17: IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
! 18: SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 19: WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
! 20: IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
! 21: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
! 22: THIS SOFTWARE.
! 23: ****************************************************************/
! 24:
! 25: This file lists all bug fixes, changes, etc., made since the AWK book
! 26: was sent to the printers in August 1987.
! 27:
! 28: Sep 06, 2023:
! 29: Fix edge case where FS is changed on commandline. Thanks to
! 30: Gordon Shephard and Miguel Pineiro Jr.
! 31:
! 32: Fix regular expression clobbering in the lexer, where lexer does
! 33: not make a copy of regexp literals. also makedfa memory leaks have
! 34: been plugged. Thanks to Miguel Pineiro Jr.
! 35:
! 36: Dec 15, 2022:
! 37: Force hex escapes in strings to be no more than two characters,
! 38: as they already are in regular expressions. This brings internal
! 39: consistency, as well as consistency with gawk. Thanks to
! 40: Arnold Robbins.
! 41:
! 42: Sep 12, 2022:
! 43: adjbuf minlen error (cannot be 0) in cat, resulting in NULL pbuf.
! 44: discovered by todd miller. also use-after-free issue with
! 45: tempfree in cat, thanks to Miguel Pineiro Jr and valgrind.
! 46:
! 47: Aug 30, 2022:
! 48: Various leaks and use-after-free issues plugged/fixed.
! 49: Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>.
! 50:
! 51: May 23, 2022:
! 52: Memory leak when assigning a string to some of the built-in
! 53: variables. allocated string erroneously marked DONTFREE.
! 54: Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>.
! 55:
! 56: Mar 14, 2022:
! 57: Historic bug: command-line "name=value" assignment had been
! 58: truncating its entry in ARGV. (circa 1989) Thanks to
! 59: Miguel Pineiro Jr. <mpj@pineiro.cc>.
! 60:
! 61: Mar 3, 2022:
! 62: Fixed file management memory leak that appears to have been
! 63: there since the files array was first initialized with stdin,
! 64: stdout, and stderr (circa 1992). Thanks to Miguel Pineiro Jr.
! 65: <mpj@pineiro.cc>.
! 66:
! 67: December 8, 2021:
! 68: The error handling in closefile and closeall was mangled. Long
! 69: standing warnings had been made fatal and some fatal errors went
! 70: undetected. Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>.
! 71:
! 72: Nov 03, 2021:
! 73: getline accesses uninitialized data after getrec()
! 74: returns 0 on EOF and leaves the contents of buf unchanged.
! 75: Thanks to Volodymyr Gubarkov, and Todd C Miller.
! 76:
! 77: Oct 12, 2021:
! 78: The fix for #83 changed the code to insert 2 chars, but the
! 79: call to adjbuf just above it only allows for 1 char. This can
! 80: cause a heap buffer overflow.
! 81:
! 82: July 27, 2021:
! 83: As per IEEE Std 1003.1-2008, -F "str" is now consistent with
! 84: -v FS="str" when str is null. Thanks to Warner Losh.
! 85:
! 86: July 24, 2021:
! 87: Fix readrec's definition of a record. This fixes an issue
! 88: with NetBSD's RS regular expression support that can cause
! 89: an infinite read loop. Thanks to Miguel Pineiro Jr.
! 90:
! 91: Fix regular expression RS ^-anchoring. RS ^-anchoring needs to
! 92: know if it is reading the first record of a file. This change
! 93: restores a missing line that was overlooked when porting NetBSD's
! 94: RS regex functionality. Thanks to Miguel Pineiro Jr.
! 95:
! 96: Fix size computation in replace_repeat() for special case
! 97: REPEAT_WITH_Q. Thanks to Todd C. Miller.
! 98:
! 99: February 15, 2021:
! 100: Small fix so that awk will compile again with g++. Thanks to
! 101: Arnold Robbins.
! 102:
! 103: January 06, 2021:
! 104: Fix a decision bug with trailing stuff in lib.c:is_valid_number
! 105: after recent changes. Thanks to Ozan Yigit.
! 106:
! 107: December 18, 2020:
! 108: Fix problems converting inf and NaN values in lib.c:is_valid_number.
! 109: Enhance number to string conversion to do the right thing for
! 110: NaN and inf values. Things are now pretty much the same as in
! 111: gawk. (Found a gawk bug while we're at it.) Added a torture
! 112: test for these values. Thanks to Arnold Robbins. Allows closing
! 113: of PR #101.
! 114:
! 115: December 15, 2020:
! 116: Merge PR #99, which gets the right header for strcasecmp.
! 117: Thanks to GitHub user michaelforney.
! 118:
! 119: December 8, 2020:
! 120: Merge PR #98: Disallow hex data. Allow only +nan, -nan,
! 121: +inf, -inf (case independent) to give NaN and infinity values.
! 122: Improve things so that string to double conversion is only
! 123: done once, yielding something of a speedup. This obviate
! 124: PR #95. Thanks to Arnold Robbins.
! 125:
! 126: December 3, 2020:
! 127: Fix to argument parsing to avoid printing spurious newlines.
! 128: Thanks to Todd Miller. Merges PR #97.
! 129:
! 130: October 13, 2020:
! 131: Add casts before all the calls to malloc/calloc/realloc in order
! 132: to get it to compile with g++. Thanks to Arnold Robbins.
! 133:
! 134: August 16, 2020:
! 135: Additional fixes for DJGPP. Thanks to Eli Zaretskii for
! 136: the testing.
! 137:
! 138: August 7, 2020:
! 139: Merge PR #93, which adds casts to (void*) for debug prints
! 140: using the %p format specifier. Thanks to GitHub user YongHaoWu
! 141: ("Chris") for the fixes.
! 142:
! 143: August 4, 2020:
! 144: In run.c, use non-restartable multibyte routines to attain
! 145: portability to DJGPP. Should fix Issue 92. Thanks to Albert Wik
! 146: for the report and to Todd Miller for the suggested fix.
! 147:
! 148: July 30, 2020:
! 149: Merge PRs 88-91 which fix small bugs. Thanks to Todd Miller and
! 150: Tim van der Molen for the fixes.
! 151:
! 152: In order to make life easier, we move exclusively to bison
! 153: as the parser generator.
! 154:
! 155: July 2, 2020:
! 156: Merge PRs 85 and 86 which fix regressions. Thanks to
! 157: Tim van der Molen for the fixes.
! 158:
! 159: June 25, 2020:
! 160: Merge PRs 82 and 84. The latter fixes issue #83. Thanks to
! 161: Todd Miller and awkfan77.
! 162:
! 163: June 12, 2020:
! 164: Clear errno before calling errcheck to avoid any spurious errors
! 165: left over from previous calls that may have set it. Thanks to
! 166: Todd Miller for the fix, from PR #80.
! 167:
! 168: Fix Issue #78 by allowing \r to follow floating point numbers in
! 169: lib.c:is_number. Thanks to GitHub user ajcarr for the report
! 170: and to Arnold Robbins for the fix.
! 171:
! 172: June 5, 2020:
! 173: In fldbld(), make sure that inputFS is set before trying to
! 174: use it. Thanks to Steffen Nurpmeso <steffen@sdaoden.eu>
! 175: for the report.
! 176:
! 177: May 5, 2020:
! 178: Fix checks for compilers that can handle noreturn. Thanks to
! 179: GitHub user enh-google for pointing it out. Closes Issue #79.
! 180:
! 181: April 16, 2020:
! 182: Handle old compilers that don't support C11 (for noreturn).
! 183: Thanks to Arnold Robbins.
! 184:
! 185: April 5, 2020:
! 186: Use <stdnoreturn.h> and noreturn instead of GCC attributes.
! 187: Thanks to GitHub user awkfan77. Closes PR #77.
! 188:
! 189: February 28, 2020:
! 190: More cleanups from Christos Zoulas: notably backslash continuation
! 191: inside strings removes the newline and a fix for RS = "^a".
! 192: Fix for address sanitizer-found problem. Thanks to GitHub user
! 193: enh-google.
! 194:
! 195: February 19, 2020:
! 196: More small cleanups from Christos Zoulas.
! 197:
! 198: February 18, 2020:
! 199: Additional cleanups from Christos Zoulas. It's no longer necessary
! 200: to use the -y flag to bison.
! 201:
! 202: February 6, 2020:
! 203: Additional small cleanups from Christos Zoulas. awk is now
! 204: a little more robust about reporting I/O errors upon exit.
! 205:
! 206: January 31, 2020:
! 207: Merge PR #70, which avoids use of variable length arrays. Thanks
! 208: to GitHub user michaelforney. Fix issue #60 ({0} in interval
! 209: expressions doesn't work). Also get all tests working again.
! 210: Thanks to Arnold Robbins.
! 211:
! 212: January 24, 2020:
! 213: A number of small cleanups from Christos Zoulas. Add the close
! 214: on exec flag to files/pipes opened for redirection; courtesy of
! 215: Arnold Robbins.
! 216:
! 217: January 19, 2020:
! 218: If POSIXLY_CORRECT is set in the environment, then sub and gsub
! 219: use POSIX rules for multiple backslashes. This fixes Issue #66,
! 220: while maintaining backwards compatibility.
! 221:
! 222: January 9, 2020:
! 223: Input/output errors on closing files are now fatal instead of
! 224: mere warnings. Thanks to Martijn Dekker <martijn@inlv.org>.
! 225:
! 226: January 5, 2020:
! 227: Fix a bug in the concatentation of two string constants into
! 228: one done in the grammar. Fixes GitHub issue #61. Thanks
! 229: to GitHub user awkfan77 for pointing out the direction for
! 230: the fix. New test T.concat added to the test suite.
! 231: Fix a few memory leaks reported by valgrind, as well.
! 232:
! 233: December 27, 2019:
! 234: Fix a bug whereby a{0,3} could match four a's. Thanks to
! 235: "Anonymous AWK fan" for the report.
! 236:
! 237: December 11, 2019:
! 238: Further printf-related fixes for 32 bit systems.
! 239: Thanks again to Christos Zoulas.
! 240:
! 241: December 8, 2019:
! 242: Fix the return value of sprintf("%d") on 32 bit systems.
! 243: Thanks to Jim Lowe for the report and to Christos Zoulas
! 244: for the fix.
! 245:
! 246: November 10, 2019:
! 247: Convert a number of Boolean integer variables into
! 248: actual bools. Convert compile_time variable into an
! 249: enum and simplify some of the related code. Thanks
! 250: to Arnold Robbins.
! 251:
! 252: November 8, 2019:
! 253: Fix from Ori Bernstein to get UTF-8 characters instead of
! 254: bytes when FS = "". This is currently the only bit of
! 255: the One True Awk that understands multibyte characters.
! 256: From Arnold Robbins, apply some cleanups in the test suite.
! 257:
! 258: October 25, 2019:
! 259: More fixes and cleanups from NetBSD, courtesy of Christos
! 260: Zoulas. Merges PRs 54 and 55.
! 261:
! 262: October 24, 2019:
! 263: Import second round of code cleanups from NetBSD. Much thanks
! 264: to Christos Zoulas (GitHub user zoulasc). Merges PR 53.
! 265: Add an optimization for string concatenation, also from
! 266: Christos.
! 267:
! 268: October 17, 2019:
! 269: Import code cleanups from NetBSD. Much thanks to Christos
! 270: Zoulas (GitHub user zoulasc). Merges PR 51.
! 271:
! 272: October 6, 2019:
! 273: Import code from NetBSD awk that implements RS as a regular
! 274: expression.
! 275:
! 276: September 10, 2019:
! 277: Fixes for various array / memory overruns found via gcc's
! 278: -fsanitize=unknown. Thanks to Alexander Richardson (GitHub
! 279: user arichardson). Merges PRs 47 and 48.
! 280:
! 281: July 28, 2019:
! 282: Import grammar optimization from NetBSD: Two string constants
! 283: concatenated together get turned into a single string.
! 284:
! 285: July 26, 2019:
! 286: Support POSIX-specified C-style escape sequences "\a" (alarm)
! 287: and "\v" (vertical tab) in command line arguments and regular
! 288: expressions, further to the support for them in strings added on
! 289: Apr 9, 1989. These now no longer match as literal "a" and "v"
! 290: characters (as they don't on other awk implementations).
! 291: Thanks to Martijn Dekker.
! 292:
! 293: July 17, 2019:
! 294: Pull in a number of code cleanups and minor fixes from
! 295: Warner Losh's bsd-ota branch. The only user visible change
! 296: is the use of random(3) as the random number generator.
! 297: Thanks to Warner Losh for collecting all these fixes in
! 298: one easy place to get them from.
! 299:
! 300: July 16, 2019:
! 301: Fix field splitting to use FS value as of the time a record
! 302: was read or assigned to. Thanks to GitHub user Cody Mello (melloc)
! 303: for the fix. (Merged from his branch, via PR #42.) Updated
! 304: testdir/T.split per said PR as well.
! 305:
! 306: June 24, 2019:
! 307: Extract awktest.tar into testdir directory. Add some very
! 308: simple mechanics to the makefile for running the tests and
! 309: for cleaning up. No changes to awk itself.
! 310:
! 311: June 17, 2019:
! 312: Disallow deleting SYMTAB and its elements, which creates
! 313: use-after-free bugs. Thanks to GitHub user Cody Mello (melloc)
! 314: for the fix. (Merged from PR #43.)
! 315:
! 316: June 5, 2019:
! 317: Allow unmatched right parenthesis in a regular expression to
! 318: be treated literally. Fixes Issue #40. Thanks to GitHub user
! 319: Warner Losh (bsdimp) for the report. Thanks to Arnold Robbins
! 320: for the fix.
! 321:
! 322: May 29,2019:
! 323: Fix check for command line arguments to no longer require that
! 324: first character after '=' not be another '='. Reverts change of
! 325: August 11, 1989. Thanks to GitHub user Jamie Landeg Jones for
! 326: pointing out the issue; from Issue #38.
! 327:
! 328: Apr 7, 2019:
! 329: Update awktest.tar(p.50) to use modern options to sort. Needed
! 330: for Android development. Thanks to GitHub user mohd-akram (Mohamed
! 331: Akram). From Issue #33.
! 332:
! 333: Mar 12, 2019:
! 334: Added very simplistic support for cross-compiling in the
! 335: makefile. We are NOT going to go in the direction of the
! 336: autotools, though. Thanks to GitHub user nee-san for
! 337: the basic change. (Merged from PR #34.)
! 338:
! 339: Mar 5, 2019:
! 340: Added support for POSIX-standard interval expressions (a.k.a.
! 341: bounds, a.k.a. repetition expressions) in regular expressions,
! 342: backported (via NetBSD) from Apple awk-24 (20070501).
! 343: Thanks to Martijn Dekker <martijn@inlv.org> for the port.
! 344: (Merged from PR #30.)
! 345:
! 346: Mar 3, 2019:
! 347: Merge PRs as follows:
! 348: #12: Avoid undefined behaviour when using ctype(3) functions in
! 349: relex(). Thanks to GitHub user iamleot.
! 350: #31: Make getline handle numeric strings, and update FIXES. Thanks
! 351: to GitHub user Arnold Robbins (arnoldrobbins)
! 352: #32: maketab: support build systems with read-only source. Thanks
! 353: to GitHub user enh.
! 354:
! 355: Jan 25, 2019:
! 356: Make getline handle numeric strings properly in all cases.
! 357: (Thanks, Arnold.)
! 358:
! 359: Jan 21, 2019:
! 360: Merged a number of small fixes from GitHub pull requests.
! 361: Thanks to GitHub users Arnold Robbins (arnoldrobbins),
! 362: Cody Mello (melloc) and Christoph Junghans (junghans).
! 363: PR numbers: 13-21, 23, 24, 27.
! 364:
! 365: Oct 25, 2018:
! 366: Added test in maketab.c to prevent generating a proctab entry
! 367: for YYSTYPE_IS_DEFINED. It was harmless but some gcc settings
! 368: generated a warning message. Thanks to Nan Xiao for report.
! 369:
! 370: Aug 27, 2018:
! 371: Disallow '$' in printf formats; arguments evaluated in order
! 372: and printed in order.
! 373:
! 374: Added some casts to silence warnings on debugging printfs.
! 375: (Thanks, Arnold.)
! 376:
! 377: Aug 23, 2018:
! 378: A long list of fixes courtesy of Arnold Robbins,
! 379: to whom profound thanks.
! 380:
! 381: 1. ofs-rebuild: OFS value used to rebuild the record was incorrect.
! 382: Fixed August 19, 2014. Revised fix August 2018.
! 383:
! 384: 2. system-status: Instead of a floating-point division by 256, use
! 385: the wait(2) macros to create a reasonable exit status.
! 386: Fixed March 12, 2016.
! 387:
! 388: 3. space: Use provided xisblank() function instead of ispace() for
! 389: matching [[:blank:]].
! 390:
! 391: 4. a-format: Add POSIX standard %a and %A to supported formats. Check
! 392: at runtime that this format is available.
! 393:
! 394: 5. decr-NF: Decrementing NF did not change $0. This is a decades-old
! 395: bug. There are interactions with the old and new value of OFS as well.
! 396: Most of the fix came from the NetBSD awk.
! 397:
! 398: 6. string-conv: String conversions of scalars were sticky. Once a
! 399: conversion to string happened, even with OFMT, that value was used until
! 400: a new numeric value was assigned, even if OFMT differed from CONVFMT,
! 401: and also if CONVFMT changed.
! 402:
! 403: 7. unary-plus: Unary plus on a string constant returned the string.
! 404: Instead, it should convert the value to numeric and give that value.
! 405:
! 406: Also added Arnold's tests for these to awktest.tar as T.arnold.
! 407:
! 408: Aug 15, 2018:
! 409: fixed mangled awktest.tar (thanks, Arnold), posted all
! 410: current (very minor) fixes to github / onetrueawk
! 411:
! 412: Jun 7, 2018:
! 413: (yes, a long layoff)
! 414: Updated some broken tests (beebe.tar, T.lilly)
! 415: [thanks to Arnold Robbins]
! 416:
! 417: Mar 26, 2015:
! 418: buffer overflow in error reporting; thanks to tobias ulmer
! 419: and john-mark gurney for spotting it and the fix.
! 420:
! 421: Feb 4, 2013:
! 422: cleaned up a handful of tests that didn't seem to actually
! 423: test for correct behavior: T.latin1, T.gawk.
! 424:
! 425: Jan 5, 2013:
! 426: added ,NULL initializer to static Cells in run.c; not really
! 427: needed but cleaner. Thanks to Michael Bombardieri.
! 428:
! 429: Dec 20, 2012:
! 430: fiddled makefile to get correct yacc and bison flags. pick yacc
! 431: (linux) or bison (mac) as necessary.
! 432:
! 433: added __attribute__((__noreturn__)) to a couple of lines in
! 434: proto.h, to silence someone's enthusiastic checker.
! 435:
! 436: fixed obscure call by value bug in split(a[1],a) reported on
! 437: 9fans. the management of temporary values is just a mess; i
! 438: took a shortcut by making an extra string copy. thanks
! 439: to paul patience and arnold robbins for passing it on and for
! 440: proposed patches.
! 441:
! 442: tiny fiddle in setfval to eliminate -0 results in T.expr, which
! 443: has irritated me for 20+ years.
! 444:
! 445: Aug 10, 2011:
! 446: another fix to avoid core dump with delete(ARGV); again, many thanks
! 447: to ruslan ermilov.
! 448:
! 449: Aug 7, 2011:
! 450: split(s, a, //) now behaves the same as split(s, a, "")
! 451:
! 452: Jun 12, 2011:
! 453: /pat/, \n /pat/ {...} is now legal, though bad style to use.
! 454:
! 455: added checks to new -v code that permits -vnospace; thanks to
! 456: ruslan ermilov for spotting this and providing the patch.
! 457:
! 458: removed fixed limit on number of open files; thanks to aleksey
! 459: cheusov and christos zoulos.
! 460:
! 461: fixed day 1 bug that resurrected deleted elements of ARGV when
! 462: used as filenames (in lib.c).
! 463:
! 464: minor type fiddles to make gcc -Wall -pedantic happier (but not
! 465: totally so); turned on -fno-strict-aliasing in makefile.
! 466:
! 467: May 6, 2011:
! 468: added #ifdef for isblank.
! 469: now allows -ffoo as well as -f foo arguments.
! 470: (thanks, ruslan)
! 471:
! 472: May 1, 2011:
! 473: after advice from todd miller, kevin lo, ruslan ermilov,
! 474: and arnold robbins, changed srand() to return the previous
! 475: seed (which is 1 on the first call of srand). the seed is
! 476: an Awkfloat internally though converted to unsigned int to
! 477: pass to the library srand(). thanks, everyone.
! 478:
! 479: fixed a subtle (and i hope low-probability) overflow error
! 480: in fldbld, by adding space for one extra \0. thanks to
! 481: robert bassett for spotting this one and providing a fix.
! 482:
! 483: removed the files related to compilation on windows. i no
! 484: longer have anything like a current windows environment, so
! 485: i can't test any of it.
! 486:
! 487: May 23, 2010:
! 488: fixed long-standing overflow bug in run.c; many thanks to
! 489: nelson beebe for spotting it and providing the fix.
! 490:
! 491: fixed bug that didn't parse -vd=1 properly; thanks to santiago
! 492: vila for spotting it.
! 493:
! 494: Feb 8, 2010:
! 495: i give up. replaced isblank with isspace in b.c; there are
! 496: no consistent header files.
! 497:
! 498: Nov 26, 2009:
! 499: fixed a long-standing issue with when FS takes effect. a
! 500: change to FS is now noticed immediately for subsequent splits.
! 501:
! 502: changed the name getline() to awkgetline() to avoid yet another
! 503: name conflict somewhere.
! 504:
! 505: Feb 11, 2009:
! 506: temporarily for now defined HAS_ISBLANK, since that seems to
! 507: be the best way through the thicket. isblank arrived in C99,
! 508: but seems to be arriving at different systems at different
! 509: times.
! 510:
! 511: Oct 8, 2008:
! 512: fixed typo in b.c that set tmpvec wrongly. no one had ever
! 513: run into the problem, apparently. thanks to alistair crooks.
! 514:
! 515: Oct 23, 2007:
! 516: minor fix in lib.c: increase inputFS to 100, change malloc
! 517: for fields to n+1.
! 518:
! 519: fixed memory fault caused by out of order test in setsval.
! 520:
! 521: thanks to david o'brien, freebsd, for both fixes.
! 522:
! 523: May 1, 2007:
! 524: fiddle in makefile to fix for BSD make; thanks to igor sobrado.
! 525:
! 526: Mar 31, 2007:
! 527: fixed some null pointer refs calling adjbuf.
! 528:
! 529: Feb 21, 2007:
! 530: fixed a bug in matching the null RE in sub and gsub. thanks to al aho
! 531: who actually did the fix (in b.c), and to wolfgang seeberg for finding
! 532: it and providing a very compact test case.
! 533:
! 534: fixed quotation in b.c; thanks to Hal Pratt and the Princeton Dante
! 535: Project.
! 536:
! 537: removed some no-effect asserts in run.c.
! 538:
! 539: fiddled maketab.c to not complain about bison-generated values.
! 540:
! 541: removed the obsolete -V argument; fixed --version to print the
! 542: version and exit.
! 543:
! 544: fixed wording and an outright error in the usage message; thanks to igor
! 545: sobrado and jason mcintyre.
! 546:
! 547: fixed a bug in -d that caused core dump if no program followed.
! 548:
! 549: Jan 1, 2007:
! 550: dropped mac.code from makefile; there are few non-MacOSX
! 551: mac's these days.
! 552:
! 553: Jan 17, 2006:
! 554: system() not flagged as unsafe in the unadvertised -safe option.
! 555: found it while enhancing tests before shipping the ;login: article.
! 556: practice what you preach.
! 557:
! 558: removed the 9-years-obsolete -mr and -mf flags.
! 559:
! 560: added -version and --version options.
! 561:
! 562: core dump on linux with BEGIN {nextfile}, now fixed.
! 563:
! 564: removed some #ifdef's in run.c and lex.c that appear to no
! 565: longer be necessary.
! 566:
! 567: Apr 24, 2005:
! 568: modified lib.c so that values of $0 et al are preserved in the END
! 569: block, apparently as required by posix. thanks to havard eidnes
! 570: for the report and code.
! 571:
! 572: Jan 14, 2005:
! 573: fixed infinite loop in parsing, originally found by brian tsang.
! 574: thanks to arnold robbins for a suggestion that started me
! 575: rethinking it.
! 576:
! 577: Dec 31, 2004:
! 578: prevent overflow of -f array in main, head off potential error in
! 579: call of SYNTAX(), test malloc return in lib.c, all with thanks to
! 580: todd miller.
! 581:
! 582: Dec 22, 2004:
! 583: cranked up size of NCHARS; coverity thinks it can be overrun with
! 584: smaller size, and i think that's right. added some assertions to b.c
! 585: to catch places where it might overrun. the RE code is still fragile.
! 586:
! 587: Dec 5, 2004:
! 588: fixed a couple of overflow problems with ridiculous field numbers:
! 589: e.g., print $(2^32-1). thanks to ruslan ermilov, giorgos keramidas
! 590: and david o'brien at freebsd.org for patches. this really should
! 591: be re-done from scratch.
! 592:
! 593: Nov 21, 2004:
! 594: fixed another 25-year-old RE bug, in split. it's another failure
! 595: to (re-)initialize. thanks to steve fisher for spotting this and
! 596: providing a good test case.
! 597:
! 598: Nov 22, 2003:
! 599: fixed a bug in regular expressions that dates (so help me) from 1977;
! 600: it's been there from the beginning. an anchored longest match that
! 601: was longer than the number of states triggered a failure to initialize
! 602: the machine properly. many thanks to moinak ghosh for not only finding
! 603: this one but for providing a fix, in some of the most mysterious
! 604: code known to man.
! 605:
! 606: fixed a storage leak in call() that appears to have been there since
! 607: 1983 or so -- a function without an explicit return that assigns a
! 608: string to a parameter leaked a Cell. thanks to moinak ghosh for
! 609: spotting this very subtle one.
! 610:
! 611: Jul 31, 2003:
! 612: fixed, thanks to andrey chernov and ruslan ermilov, a bug in lex.c
! 613: that mis-handled the character 255 in input. (it was being compared
! 614: to EOF with a signed comparison.)
! 615:
! 616: Jul 29, 2003:
! 617: fixed (i think) the long-standing botch that included the beginning of
! 618: line state ^ for RE's in the set of valid characters; this led to a
! 619: variety of odd problems, including failure to properly match certain
! 620: regular expressions in non-US locales. thanks to ruslan for keeping
! 621: at this one.
! 622:
! 623: Jul 28, 2003:
! 624: n-th try at getting internationalization right, with thanks to volker
! 625: kiefel, arnold robbins and ruslan ermilov for advice, though they
! 626: should not be blamed for the outcome. according to posix, "." is the
! 627: radix character in programs and command line arguments regardless of
! 628: the locale; otherwise, the locale should prevail for input and output
! 629: of numbers. so it's intended to work that way.
! 630:
! 631: i have rescinded the attempt to use strcoll in expanding shorthands in
! 632: regular expressions (cclenter). its properties are much too
! 633: surprising; for example [a-c] matches aAbBc in locale en_US but abBcC
! 634: in locale fr_CA. i can see how this might arise by implementation
! 635: but i cannot explain it to a human user. (this behavior can be seen
! 636: in gawk as well; we're leaning on the same library.)
! 637:
! 638: the issue appears to be that strcoll is meant for sorting, where
! 639: merging upper and lower case may make sense (though note that unix
! 640: sort does not do this by default either). it is not appropriate
! 641: for regular expressions, where the goal is to match specific
! 642: patterns of characters. in any case, the notations [:lower:], etc.,
! 643: are available in awk, and they are more likely to work correctly in
! 644: most locales.
! 645:
! 646: a moratorium is hereby declared on internationalization changes.
! 647: i apologize to friends and colleagues in other parts of the world.
! 648: i would truly like to get this "right", but i don't know what
! 649: that is, and i do not want to keep making changes until it's clear.
! 650:
! 651: Jul 4, 2003:
! 652: fixed bug that permitted non-terminated RE, as in "awk /x".
! 653:
! 654: Jun 1, 2003:
! 655: subtle change to split: if source is empty, number of elems
! 656: is always 0 and the array is not set.
! 657:
! 658: Mar 21, 2003:
! 659: added some parens to isblank, in another attempt to make things
! 660: internationally portable.
! 661:
! 662: Mar 14, 2003:
! 663: the internationalization changes, somewhat modified, are now
! 664: reinstated. in theory awk will now do character comparisons
! 665: and case conversions in national language, but "." will always
! 666: be the decimal point separator on input and output regardless
! 667: of national language. isblank(){} has an #ifndef.
! 668:
! 669: this no longer compiles on windows: LC_MESSAGES isn't defined
! 670: in vc6++.
! 671:
! 672: fixed subtle behavior in field and record splitting: if FS is
! 673: a single character and RS is not empty, \n is NOT a separator.
! 674: this tortuous reading is found in the awk book; behavior now
! 675: matches gawk and mawk.
! 676:
! 677: Dec 13, 2002:
! 678: for the moment, the internationalization changes of nov 29 are
! 679: rolled back -- programs like x = 1.2 don't work in some locales,
! 680: because the parser is expecting x = 1,2. until i understand this
! 681: better, this will have to wait.
! 682:
! 683: Nov 29, 2002:
! 684: modified b.c (with tiny changes in main and run) to support
! 685: locales, using strcoll and iswhatever tests for posix character
! 686: classes. thanks to ruslan ermilov (ru@freebsd.org) for code.
! 687: the function isblank doesn't seem to have propagated to any
! 688: header file near me, so it's there explicitly. not properly
! 689: tested on non-ascii character sets by me.
! 690:
! 691: Jun 28, 2002:
! 692: modified run/format() and tran/getsval() to do a slightly better
! 693: job on using OFMT for output from print and CONVFMT for other
! 694: number->string conversions, as promised by posix and done by
! 695: gawk and mawk. there are still places where it doesn't work
! 696: right if CONVFMT is changed; by then the STR attribute of the
! 697: variable has been irrevocably set. thanks to arnold robbins for
! 698: code and examples.
! 699:
! 700: fixed subtle bug in format that could get core dump. thanks to
! 701: Jaromir Dolecek <jdolecek@NetBSD.org> for finding and fixing.
! 702: minor cleanup in run.c / format() at the same time.
! 703:
! 704: added some tests for null pointers to debugging printf's, which
! 705: were never intended for external consumption. thanks to dave
! 706: kerns (dkerns@lucent.com) for pointing this out.
! 707:
! 708: GNU compatibility: an empty regexp matches anything (thanks to
! 709: dag-erling smorgrav, des@ofug.org). subject to reversion if
! 710: this does more harm than good.
! 711:
! 712: pervasive small changes to make things more const-correct, as
! 713: reported by gcc's -Wwrite-strings. as it says in the gcc manual,
! 714: this may be more nuisance than useful. provoked by a suggestion
! 715: and code from arnaud desitter, arnaud@nimbus.geog.ox.ac.uk
! 716:
! 717: minor documentation changes to note that this now compiles out
! 718: of the box on Mac OS X.
! 719:
! 720: Feb 10, 2002:
! 721: changed types in posix chars structure to quiet solaris cc.
! 722:
! 723: Jan 1, 2002:
! 724: fflush() or fflush("") flushes all files and pipes.
! 725:
! 726: length(arrayname) returns number of elements; thanks to
! 727: arnold robbins for suggestion.
! 728:
! 729: added a makefile.win to make it easier to build on windows.
! 730: based on dan allen's buildwin.bat.
! 731:
! 732: Nov 16, 2001:
! 733: added support for posix character class names like [:digit:],
! 734: which are not exactly shorter than [0-9] and perhaps no more
! 735: portable. thanks to dag-erling smorgrav for code.
! 736:
! 737: Feb 16, 2001:
! 738: removed -m option; no longer needed, and it was actually
! 739: broken (noted thanks to volker kiefel).
! 740:
! 741: Feb 10, 2001:
! 742: fixed an appalling bug in gettok: any sequence of digits, +,-, E, e,
! 743: and period was accepted as a valid number if it started with a period.
! 744: this would never have happened with the lex version.
! 745:
! 746: other 1-character botches, now fixed, include a bare $ and a
! 747: bare " at the end of the input.
! 748:
! 749: Feb 7, 2001:
! 750: more (const char *) casts in b.c and tran.c to silence warnings.
! 751:
! 752: Nov 15, 2000:
! 753: fixed a bug introduced in august 1997 that caused expressions
! 754: like $f[1] to be syntax errors. thanks to arnold robbins for
! 755: noticing this and providing a fix.
! 756:
! 757: Oct 30, 2000:
! 758: fixed some nextfile bugs: not handling all cases. thanks to
! 759: arnold robbins for pointing this out. new regressions added.
! 760:
! 761: close() is now a function. it returns whatever the library
! 762: fclose returns, and -1 for closing a file or pipe that wasn't
! 763: opened.
! 764:
! 765: Sep 24, 2000:
! 766: permit \n explicitly in character classes; won't work right
! 767: if comes in as "[\n]" but ok as /[\n]/, because of multiple
! 768: processing of \'s. thanks to arnold robbins.
! 769:
! 770: July 5, 2000:
! 771: minor fiddles in tran.c to keep compilers happy about uschar.
! 772: thanks to norman wilson.
! 773:
! 774: May 25, 2000:
! 775: yet another attempt at making 8-bit input work, with another
! 776: band-aid in b.c (member()), and some (uschar) casts to head
! 777: off potential errors in subscripts (like isdigit). also
! 778: changed HAT to NCHARS-2. thanks again to santiago vila.
! 779:
! 780: changed maketab.c to ignore apparently out of range definitions
! 781: instead of halting; new freeBSD generates one. thanks to
! 782: jon snader <jsnader@ix.netcom.com> for pointing out the problem.
! 783:
! 784: May 2, 2000:
! 785: fixed an 8-bit problem in b.c by making several char*'s into
! 786: unsigned char*'s. not clear i have them all yet. thanks to
! 787: Santiago Vila <sanvila@unex.es> for the bug report.
! 788:
! 789: Apr 21, 2000:
! 790: finally found and fixed a memory leak in function call; it's
! 791: been there since functions were added ~1983. thanks to
! 792: jon bentley for the test case that found it.
! 793:
! 794: added test in envinit to catch environment "variables" with
! 795: names beginning with '='; thanks to Berend Hasselman.
! 796:
! 797: Jul 28, 1999:
! 798: added test in defn() to catch function foo(foo), which
! 799: otherwise recurses until core dump. thanks to arnold
! 800: robbins for noticing this.
! 801:
! 802: Jun 20, 1999:
! 803: added *bp in gettok in lex.c; appears possible to exit function
! 804: without terminating the string. thanks to russ cox.
! 805:
! 806: Jun 2, 1999:
! 807: added function stdinit() to run to initialize files[] array,
! 808: in case stdin, etc., are not constants; some compilers care.
! 809:
! 810: May 10, 1999:
! 811: replaced the ERROR ... FATAL, etc., macros with functions
! 812: based on vprintf, to avoid problems caused by overrunning
! 813: fixed-size errbuf array. thanks to ralph corderoy for the
! 814: impetus, and for pointing out a string termination bug in
! 815: qstring as well.
! 816:
! 817: Apr 21, 1999:
! 818: fixed bug that caused occasional core dumps with commandline
! 819: variable with value ending in \. (thanks to nelson beebe for
! 820: the test case.)
! 821:
! 822: Apr 16, 1999:
! 823: with code kindly provided by Bruce Lilly, awk now parses
! 824: /=/ and similar constructs more sensibly in more places.
! 825: Bruce also provided some helpful test cases.
! 826:
! 827: Apr 5, 1999:
! 828: changed true/false to True/False in run.c to make it
! 829: easier to compile with C++. Added some casts on malloc
! 830: and realloc to be honest about casts; ditto. changed
! 831: ltype int to long in struct rrow to reduce some 64-bit
! 832: complaints; other changes scattered throughout for the
! 833: same purpose. thanks to Nelson Beebe for these portability
! 834: improvements.
! 835:
! 836: removed some horrible pointer-int casting in b.c and elsewhere
! 837: by adding ptoi and itonp to localize the casts, which are
! 838: all benign. fixed one incipient bug that showed up on sgi
! 839: in 64-bit mode.
! 840:
! 841: reset lineno for new source file; include filename in error
! 842: message. also fixed line number error in continuation lines.
! 843: (thanks to Nelson Beebe for both of these.)
! 844:
! 845: Mar 24, 1999:
! 846: Nelson Beebe notes that irix 5.3 yacc dies with a bogus
! 847: error; use a newer version or switch to bison, since sgi
! 848: is unlikely to fix it.
! 849:
! 850: Mar 5, 1999:
! 851: changed isnumber to is_number to avoid the problem caused by
! 852: versions of ctype.h that include the name isnumber.
! 853:
! 854: distribution now includes a script for building on a Mac,
! 855: thanks to Dan Allen.
! 856:
! 857: Feb 20, 1999:
! 858: fixed memory leaks in run.c (call) and tran.c (setfval).
! 859: thanks to Stephen Nutt for finding these and providing the fixes.
! 860:
! 861: Jan 13, 1999:
! 862: replaced srand argument by (unsigned int) in run.c;
! 863: avoids problem on Mac and potentially on Unix & Windows.
! 864: thanks to Dan Allen.
! 865:
! 866: added a few (int) casts to silence useless compiler warnings.
! 867: e.g., errorflag= in run.c jump().
! 868:
! 869: added proctab.c to the bundle outout; one less thing
! 870: to have to compile out of the box.
! 871:
! 872: added calls to _popen and _pclose to the win95 stub for
! 873: pipes (thanks to Steve Adams for this helpful suggestion).
! 874: seems to work, though properties are not well understood
! 875: by me, and it appears that under some circumstances the
! 876: pipe output is truncated. Be careful.
! 877:
! 878: Oct 19, 1998:
! 879: fixed a couple of bugs in getrec: could fail to update $0
! 880: after a getline var; because inputFS wasn't initialized,
! 881: could split $0 on every character, a misleading diversion.
! 882:
! 883: fixed caching bug in makedfa: LRU was actually removing
! 884: least often used.
! 885:
! 886: thanks to ross ridge for finding these, and for providing
! 887: great bug reports.
! 888:
! 889: May 12, 1998:
! 890: fixed potential bug in readrec: might fail to update record
! 891: pointer after growing. thanks to dan levy for spotting this
! 892: and suggesting the fix.
! 893:
! 894: Mar 12, 1998:
! 895: added -V to print version number and die.
! 896:
! 897: [notify dave kerns, dkerns@dacsoup.ih.lucent.com]
! 898:
! 899: Feb 11, 1998:
! 900: subtle silent bug in lex.c: if the program ended with a number
! 901: longer than 1 digit, part of the input would be pushed back and
! 902: parsed again because token buffer wasn't terminated right.
! 903: example: awk 'length($0) > 10'. blush. at least i found it
! 904: myself.
! 905:
! 906: Aug 31, 1997:
! 907: s/adelete/awkdelete/: SGI uses this in malloc.h.
! 908: thanks to nelson beebe for pointing this one out.
! 909:
! 910: Aug 21, 1997:
! 911: fixed some bugs in sub and gsub when replacement includes \\.
! 912: this is a dark, horrible corner, but at least now i believe that
! 913: the behavior is the same as gawk and the intended posix standard.
! 914: thanks to arnold robbins for advice here.
! 915:
! 916: Aug 9, 1997:
! 917: somewhat regretfully, replaced the ancient lex-based lexical
! 918: analyzer with one written in C. it's longer, generates less code,
! 919: and more portable; the old one depended too much on mysterious
! 920: properties of lex that were not preserved in other environments.
! 921: in theory these recognize the same language.
! 922:
! 923: now using strtod to test whether a string is a number, instead of
! 924: the convoluted original function. should be more portable and
! 925: reliable if strtod is implemented right.
! 926:
! 927: removed now-pointless optimization in makefile that tries to avoid
! 928: recompilation when awkgram.y is changed but symbols are not.
! 929:
! 930: removed most fixed-size arrays, though a handful remain, some
! 931: of which are unchecked. you have been warned.
! 932:
! 933: Aug 4, 1997:
! 934: with some trepidation, replaced the ancient code that managed
! 935: fields and $0 in fixed-size arrays with arrays that grow on
! 936: demand. there is still some tension between trying to make this
! 937: run fast and making it clean; not sure it's right yet.
! 938:
! 939: the ill-conceived -mr and -mf arguments are now useful only
! 940: for debugging. previous dynamic string code removed.
! 941:
! 942: numerous other minor cleanups along the way.
! 943:
! 944: Jul 30, 1997:
! 945: using code provided by dan levy (to whom profuse thanks), replaced
! 946: fixed-size arrays and awkward kludges by a fairly uniform mechanism
! 947: to grow arrays as needed for printf, sub, gsub, etc.
! 948:
! 949: Jul 23, 1997:
! 950: falling off the end of a function returns "" and 0, not 0.
! 951: thanks to arnold robbins.
! 952:
! 953: Jun 17, 1997:
! 954: replaced several fixed-size arrays by dynamically-created ones
! 955: in run.c; added overflow tests to some previously unchecked cases.
! 956: getline, toupper, tolower.
! 957:
! 958: getline code is still broken in that recursive calls may wind
! 959: up using the same space. [fixed later]
! 960:
! 961: increased RECSIZE to 8192 to push problems further over the horizon.
! 962:
! 963: added \r to \n as input line separator for programs, not data.
! 964: damn CRLFs.
! 965:
! 966: modified format() to permit explicit printf("%c", 0) to include
! 967: a null byte in output. thanks to ken stailey for the fix.
! 968:
! 969: added a "-safe" argument that disables file output (print >,
! 970: print >>), process creation (cmd|getline, print |, system), and
! 971: access to the environment (ENVIRON). this is a first approximation
! 972: to a "safe" version of awk, but don't rely on it too much. thanks
! 973: to joan feigenbaum and matt blaze for the inspiration long ago.
! 974:
! 975: Jul 8, 1996:
! 976: fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to
! 977: ralph corderoy.
! 978:
! 979: Jun 29, 1996:
! 980: fixed awful bug in new field splitting; didn't get all the places
! 981: where input was done.
! 982:
! 983: Jun 28, 1996:
! 984: changed field-splitting to conform to posix definition: fields are
! 985: split using the value of FS at the time of input; it used to be
! 986: the value when the field or NF was first referred to, a much less
! 987: predictable definition. thanks to arnold robbins for encouragement
! 988: to do the right thing.
! 989:
! 990: May 28, 1996:
! 991: fixed appalling but apparently unimportant bug in parsing octal
! 992: numbers in reg exprs.
! 993:
! 994: explicit hex in reg exprs now limited to 2 chars: \xa, \xaa.
! 995:
! 996: May 27, 1996:
! 997: cleaned up some declarations so gcc -Wall is now almost silent.
! 998:
! 999: makefile now includes backup copies of ytab.c and lexyy.c in case
! 1000: one makes before looking; it also avoids recreating lexyy.c unless
! 1001: really needed.
! 1002:
! 1003: s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes
! 1004: with unwisely-written header files.
! 1005:
! 1006: thanks to jeffrey friedl for several of these.
! 1007:
! 1008: May 26, 1996:
! 1009: an attempt to rationalize the (unsigned) char issue. almost all
! 1010: instances of unsigned char have been removed; the handful of places
! 1011: in b.c where chars are used as table indices have been hand-crafted.
! 1012: added some latin-1 tests to the regression, but i'm not confident;
! 1013: none of my compilers seem to care much. thanks to nelson beebe for
! 1014: pointing out some others that do care.
! 1015:
! 1016: May 2, 1996:
! 1017: removed all register declarations.
! 1018:
! 1019: enhanced split(), as in gawk, etc: split(s, a, "") splits s into
! 1020: a[1]...a[length(s)] with each character a single element.
! 1021:
! 1022: made the same changes for field-splitting if FS is "".
! 1023:
! 1024: added nextfile, as in gawk: causes immediate advance to next
! 1025: input file. (thanks to arnold robbins for inspiration and code).
! 1026:
! 1027: small fixes to regexpr code: can now handle []], [[], and
! 1028: variants; [] is now a syntax error, rather than matching
! 1029: everything; [z-a] is now empty, not z. far from complete
! 1030: or correct, however. (thanks to jeffrey friedl for pointing out
! 1031: some awful behaviors.)
! 1032:
! 1033: Apr 29, 1996:
! 1034: replaced uchar by uschar everywhere; apparently some compilers
! 1035: usurp this name and this causes conflicts.
! 1036:
! 1037: fixed call to time in run.c (bltin); arg is time_t *.
! 1038:
! 1039: replaced horrible pointer/long punning in b.c by a legitimate
! 1040: union. should be safer on 64-bit machines and cleaner everywhere.
! 1041: (thanks to nelson beebe for pointing out some of these problems.)
! 1042:
! 1043: replaced nested comments by #if 0...#endif in run.c, lib.c.
! 1044:
! 1045: removed getsval, setsval, execute macros from run.c and lib.c.
! 1046: machines are 100x faster than they were when these macros were
! 1047: first used.
! 1048:
! 1049: revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l,
! 1050: y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of
! 1051: portability to nameless systems.
! 1052:
! 1053: "make bundle" now includes yacc and lex output files for recipients
! 1054: who don't have yacc or lex.
! 1055:
! 1056: Aug 15, 1995:
! 1057: initialized Cells in setsymtab more carefully; some fields
! 1058: were not set. (thanks to purify, all of whose complaints i
! 1059: think i now understand.)
! 1060:
! 1061: fixed at least one error in gsub that looked at -1-th element
! 1062: of an array when substituting for a null match (e.g., $).
! 1063:
! 1064: delete arrayname is now legal; it clears the elements but leaves
! 1065: the array, which may not be the right behavior.
! 1066:
! 1067: modified makefile: my current make can't cope with the test used
! 1068: to avoid unnecessary yacc invocations.
! 1069:
! 1070: Jul 17, 1995:
! 1071: added dynamically growing strings to awk.lx.l and b.c
! 1072: to permit regular expressions to be much bigger.
! 1073: the state arrays can still overflow.
! 1074:
! 1075: Aug 24, 1994:
! 1076: detect duplicate arguments in function definitions (mdm).
! 1077:
! 1078: May 11, 1994:
! 1079: trivial fix to printf to limit string size in sub().
! 1080:
! 1081: Apr 22, 1994:
! 1082: fixed yet another subtle self-assignment problem:
! 1083: $1 = $2; $1 = $1 clobbered $1.
! 1084:
! 1085: Regression tests now use private echo, to avoid quoting problems.
! 1086:
! 1087: Feb 2, 1994:
! 1088: changed error() to print line number as %d, not %g.
! 1089:
! 1090: Jul 23, 1993:
! 1091: cosmetic changes: increased sizes of some arrays,
! 1092: reworded some error messages.
! 1093:
! 1094: added CONVFMT as in posix (just replaced OFMT in getsval)
! 1095:
! 1096: FILENAME is now "" until the first thing that causes a file
! 1097: to be opened.
! 1098:
! 1099: Nov 28, 1992:
! 1100: deleted yyunput and yyoutput from proto.h;
! 1101: different versions of lex give these different declarations.
! 1102:
! 1103: May 31, 1992:
! 1104: added -mr N and -mf N options: more record and fields.
! 1105: these really ought to adjust automatically.
! 1106:
! 1107: cleaned up some error messages; "out of space" now means
! 1108: malloc returned NULL in all cases.
! 1109:
! 1110: changed rehash so that if it runs out, it just returns;
! 1111: things will continue to run slow, but maybe a bit longer.
! 1112:
! 1113: Apr 24, 1992:
! 1114: remove redundant close of stdin when using -f -.
! 1115:
! 1116: got rid of core dump with -d; awk -d just prints date.
! 1117:
! 1118: Apr 12, 1992:
! 1119: added explicit check for /dev/std(in,out,err) in redirection.
! 1120: unlike gawk, no /dev/fd/n yet.
! 1121:
! 1122: added (file/pipe) builtin. hard to test satisfactorily.
! 1123: not posix.
! 1124:
! 1125: Feb 20, 1992:
! 1126: recompile after abortive changes; should be unchanged.
! 1127:
! 1128: Dec 2, 1991:
! 1129: die-casting time: converted to ansi C, installed that.
! 1130:
! 1131: Nov 30, 1991:
! 1132: fixed storage leak in freefa, failing to recover [N]CCL.
! 1133: thanks to Bill Jones (jones@cs.usask.ca)
! 1134:
! 1135: Nov 19, 1991:
! 1136: use RAND_MAX instead of literal in builtin().
! 1137:
! 1138: Nov 12, 1991:
! 1139: cranked up some fixed-size arrays in b.c, and added a test for
! 1140: overflow in penter. thanks to mark larsen.
! 1141:
! 1142: Sep 24, 1991:
! 1143: increased buffer in gsub. a very crude fix to a general problem.
! 1144: and again on Sep 26.
! 1145:
! 1146: Aug 18, 1991:
! 1147: enforce variable name syntax for commandline variables: has to
! 1148: start with letter or _.
! 1149:
! 1150: Jul 27, 1991:
! 1151: allow newline after ; in for statements.
! 1152:
! 1153: Jul 21, 1991:
! 1154: fixed so that in self-assignment like $1=$1, side effects
! 1155: like recomputing $0 take place. (this is getting subtle.)
! 1156:
! 1157: Jun 30, 1991:
! 1158: better test for detecting too-long output record.
! 1159:
! 1160: Jun 2, 1991:
! 1161: better defense against very long printf strings.
! 1162: made break and continue illegal outside of loops.
! 1163:
! 1164: May 13, 1991:
! 1165: removed extra arg on gettemp, tempfree. minor error message rewording.
! 1166:
! 1167: May 6, 1991:
! 1168: fixed silly bug in hex parsing in hexstr().
! 1169: removed an apparently unnecessary test in isnumber().
! 1170: warn about weird printf conversions.
! 1171: fixed unchecked array overwrite in relex().
! 1172:
! 1173: changed for (i in array) to access elements in sorted order.
! 1174: then unchanged it -- it really does run slower in too many cases.
! 1175: left the code in place, commented out.
! 1176:
! 1177: Feb 10, 1991:
! 1178: check error status on all writes, to avoid banging on full disks.
! 1179:
! 1180: Jan 28, 1991:
! 1181: awk -f - reads the program from stdin.
! 1182:
! 1183: Jan 11, 1991:
! 1184: failed to set numeric state on $0 in cmd|getline context in run.c.
! 1185:
! 1186: Nov 2, 1990:
! 1187: fixed sleazy test for integrality in getsval; use modf.
! 1188:
! 1189: Oct 29, 1990:
! 1190: fixed sleazy buggy code in lib.c that looked (incorrectly) for
! 1191: too long input lines.
! 1192:
! 1193: Oct 14, 1990:
! 1194: fixed the bug on p. 198 in which it couldn't deduce that an
! 1195: argument was an array in some contexts. replaced the error
! 1196: message in intest() by code that damn well makes it an array.
! 1197:
! 1198: Oct 8, 1990:
! 1199: fixed horrible bug: types and values were not preserved in
! 1200: some kinds of self-assignment. (in assign().)
! 1201:
! 1202: Aug 24, 1990:
! 1203: changed NCHARS to 256 to handle 8-bit characters in strings
! 1204: presented to match(), etc.
! 1205:
! 1206: Jun 26, 1990:
! 1207: changed struct rrow (awk.h) to use long instead of int for lval,
! 1208: since cfoll() stores a pointer in it. now works better when int's
! 1209: are smaller than pointers!
! 1210:
! 1211: May 6, 1990:
! 1212: AVA fixed the grammar so that ! is uniformly of the same precedence as
! 1213: unary + and -. This renders illegal some constructs like !x=y, which
! 1214: now has to be parenthesized as !(x=y), and makes others work properly:
! 1215: !x+y is (!x)+y, and x!y is x !y, not two pattern-action statements.
! 1216: (These problems were pointed out by Bob Lenk of Posix.)
! 1217:
! 1218: Added \x to regular expressions (already in strings).
! 1219: Limited octal to octal digits; \8 and \9 are not octal.
! 1220: Centralized the code for parsing escapes in regular expressions.
! 1221: Added a bunch of tests to T.re and T.sub to verify some of this.
! 1222:
! 1223: Feb 9, 1990:
! 1224: fixed null pointer dereference bug in main.c: -F[nothing]. sigh.
! 1225:
! 1226: restored srand behavior: it returns the current seed.
! 1227:
! 1228: Jan 18, 1990:
! 1229: srand now returns previous seed value (0 to start).
! 1230:
! 1231: Jan 5, 1990:
! 1232: fix potential problem in tran.c -- something was freed,
! 1233: then used in freesymtab.
! 1234:
! 1235: Oct 18, 1989:
! 1236: another try to get the max number of open files set with
! 1237: relatively machine-independent code.
! 1238:
! 1239: small fix to input() in case of multiple reads after EOF.
! 1240:
! 1241: Oct 11, 1989:
! 1242: FILENAME is now defined in the BEGIN block -- too many old
! 1243: programs broke.
! 1244:
! 1245: "-" means stdin in getline as well as on the commandline.
! 1246:
! 1247: added a bunch of casts to the code to tell the truth about
! 1248: char * vs. unsigned char *, a right royal pain. added a
! 1249: setlocale call to the front of main, though probably no one
! 1250: has it usefully implemented yet.
! 1251:
! 1252: Aug 24, 1989:
! 1253: removed redundant relational tests against nullnode if parse
! 1254: tree already had a relational at that point.
! 1255:
! 1256: Aug 11, 1989:
! 1257: fixed bug: commandline variable assignment has to look like
! 1258: var=something. (consider the man page for =, in file =.1)
! 1259:
! 1260: changed number of arguments to functions to static arrays
! 1261: to avoid repeated malloc calls.
! 1262:
! 1263: Aug 2, 1989:
! 1264: restored -F (space) separator
! 1265:
! 1266: Jul 30, 1989:
! 1267: added -v x=1 y=2 ... for immediate commandline variable assignment;
! 1268: done before the BEGIN block for sure. they have to precede the
! 1269: program if the program is on the commandline.
! 1270: Modified Aug 2 to require a separate -v for each assignment.
! 1271:
! 1272: Jul 10, 1989:
! 1273: fixed ref-thru-zero bug in environment code in tran.c
! 1274:
! 1275: Jun 23, 1989:
! 1276: add newline to usage message.
! 1277:
! 1278: Jun 14, 1989:
! 1279: added some missing ansi printf conversion letters: %i %X %E %G.
! 1280: no sensible meaning for h or L, so they may not do what one expects.
! 1281:
! 1282: made %* conversions work.
! 1283:
! 1284: changed x^y so that if n is a positive integer, it's done
! 1285: by explicit multiplication, thus achieving maximum accuracy.
! 1286: (this should be done by pow() but it seems not to be locally.)
! 1287: done to x ^= y as well.
! 1288:
! 1289: Jun 4, 1989:
! 1290: ENVIRON array contains environment: if shell variable V=thing,
! 1291: ENVIRON["V"] is "thing"
! 1292:
! 1293: multiple -f arguments permitted. error reporting is naive.
! 1294: (they were permitted before, but only the last was used.)
! 1295:
! 1296: fixed a really stupid botch in the debugging macro dprintf
! 1297:
! 1298: fixed order of evaluation of commandline assignments to match
! 1299: what the book claims: an argument of the form x=e is evaluated
! 1300: at the time it would have been opened if it were a filename (p 63).
! 1301: this invalidates the suggested answer to ex 4-1 (p 195).
! 1302:
! 1303: removed some code that permitted -F (space) fieldseparator,
! 1304: since it didn't quite work right anyway. (restored aug 2)
! 1305:
! 1306: Apr 27, 1989:
! 1307: Line number now accumulated correctly for comment lines.
! 1308:
! 1309: Apr 26, 1989:
! 1310: Debugging output now includes a version date,
! 1311: if one compiles it into the source each time.
! 1312:
! 1313: Apr 9, 1989:
! 1314: Changed grammar to prohibit constants as 3rd arg of sub and gsub;
! 1315: prevents class of overwriting-a-constant errors. (Last one?)
! 1316: This invalidates the "banana" example on page 43 of the book.
! 1317:
! 1318: Added \a ("alert"), \v (vertical tab), \xhhh (hexadecimal),
! 1319: as in ANSI, for strings. Rescinded the sloppiness that permitted
! 1320: non-octal digits in \ooo. Warning: not all compilers and libraries
! 1321: will be able to deal with \x correctly.
! 1322:
! 1323: Jan 9, 1989:
! 1324: Fixed bug that caused tempcell list to contain a duplicate.
! 1325: The fix is kludgy.
! 1326:
! 1327: Dec 17, 1988:
! 1328: Catches some more commandline errors in main.
! 1329: Removed redundant decl of modf in run.c (confuses some compilers).
! 1330: Warning: there's no single declaration of malloc, etc., in awk.h
! 1331: that seems to satisfy all compilers.
! 1332:
! 1333: Dec 7, 1988:
! 1334: Added a bit of code to error printing to avoid printing nulls.
! 1335: (Not clear that it actually would.)
! 1336:
! 1337: Nov 27, 1988:
! 1338: With fear and trembling, modified the grammar to permit
! 1339: multiple pattern-action statements on one line without
! 1340: an explicit separator. By definition, this capitulation
! 1341: to the ghost of ancient implementations remains undefined
! 1342: and thus subject to change without notice or apology.
! 1343: DO NOT COUNT ON IT.
! 1344:
! 1345: Oct 30, 1988:
! 1346: Fixed bug in call() that failed to recover storage.
! 1347:
! 1348: A warning is now generated if there are more arguments
! 1349: in the call than in the definition (in lieu of fixing
! 1350: another storage leak).
! 1351:
! 1352: Oct 20, 1988:
! 1353: Fixed %c: if expr is numeric, use numeric value;
! 1354: otherwise print 1st char of string value. still
! 1355: doesn't work if the value is 0 -- won't print \0.
! 1356:
! 1357: Added a few more checks for running out of malloc.
! 1358:
! 1359: Oct 12, 1988:
! 1360: Fixed bug in call() that freed local arrays twice.
! 1361:
! 1362: Fixed to handle deletion of non-existent array right;
! 1363: complains about attempt to delete non-array element.
! 1364:
! 1365: Sep 30, 1988:
! 1366: Now guarantees to evaluate all arguments of built-in
! 1367: functions, as in C; the appearance is that arguments
! 1368: are evaluated before the function is called. Places
! 1369: affected are sub (gsub was ok), substr, printf, and
! 1370: all the built-in arithmetic functions in bltin().
! 1371: A warning is generated if a bltin() is called with
! 1372: the wrong number of arguments.
! 1373:
! 1374: This requires changing makeprof on p167 of the book.
! 1375:
! 1376: Aug 23, 1988:
! 1377: setting FILENAME in BEGIN caused core dump, apparently
! 1378: because it was freeing space not allocated by malloc.
! 1379:
! 1380: July 24, 1988:
! 1381: fixed egregious error in toupper/tolower functions.
! 1382: still subject to rescinding, however.
! 1383:
! 1384: July 2, 1988:
! 1385: flush stdout before opening file or pipe
! 1386:
! 1387: July 2, 1988:
! 1388: performance bug in b.c/cgoto(): not freeing some sets of states.
! 1389: partial fix only right now, and the number of states increased
! 1390: to make it less obvious.
! 1391:
! 1392: June 1, 1988:
! 1393: check error status on close
! 1394:
! 1395: May 28, 1988:
! 1396: srand returns seed value it's using.
! 1397: see 1/18/90
! 1398:
! 1399: May 22, 1988:
! 1400: Removed limit on depth of function calls.
! 1401:
! 1402: May 10, 1988:
! 1403: Fixed lib.c to permit _ in commandline variable names.
! 1404:
! 1405: Mar 25, 1988:
! 1406: main.c fixed to recognize -- as terminator of command-
! 1407: line options. Illegal options flagged.
! 1408: Error reporting slightly cleaned up.
! 1409:
! 1410: Dec 2, 1987:
! 1411: Newer C compilers apply a strict scope rule to extern
! 1412: declarations within functions. Two extern declarations in
! 1413: lib.c and tran.c have been moved to obviate this problem.
! 1414:
! 1415: Oct xx, 1987:
! 1416: Reluctantly added toupper and tolower functions.
! 1417: Subject to rescinding without notice.
! 1418:
! 1419: Sep 17, 1987:
! 1420: Error-message printer had printf(s) instead of
! 1421: printf("%s",s); got core dumps when the message
! 1422: included a %.
! 1423:
! 1424: Sep 12, 1987:
! 1425: Very long printf strings caused core dump;
! 1426: fixed aprintf, asprintf, format to catch them.
! 1427: Can still get a core dump in printf itself.
! 1428:
! 1429:
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