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