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Diff for /src/usr.bin/awk/FIXES between version 1.24 and 1.25

version 1.24, 2020/06/10 21:02:19

version 1.25, 2020/06/10 21:02:33

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This file lists all bug fixes, changes, etc., made since the AWK book

was sent to the printers in August, 1987.

September 10, 2019:

Fixes for various array / memory overruns found via gcc's

-fsanitize=unknown. Thanks to Alexander Richardson (Github

user arichardson). Merges PRs 47 and 48.

July 28, 2019:

Import grammar optimization from NetBSD: Two string constants

concatenated together get turned into a single string.

July 26, 2019:

Support POSIX-specified C-style escape sequences "\a" (alarm)

and "\v" (vertical tab) in command line arguments and regular

expressions, further to the support for them in strings added on

Apr 9, 1989. These now no longer match as literal "a" and "v"

characters (as they don't on other awk implementations).

Thanks to Martijn Dekker.

July 17, 2019:

Pull in a number of code cleanups and minor fixes from

Warner Losh's bsd-ota branch. The only user visible change

is the use of random(3) as the random number generator.

Thanks to Warner Losh for collecting all these fixes in

one easy place to get them from.

July 16, 2019:

Fix field splitting to use FS value as of the time a record

was read or assigned to. Thanks to GitHub user Cody Mello (melloc)

for the fix. (Merged from his branch, via PR #42.) Updated

testdir/T.split per said PR as well.

June 24, 2019:

Extract awktest.tar into testdir directory. Add some very

simple mechanics to the makefile for running the tests and

for cleaning up. No changes to awk itself.

June 17, 2019:

Disallow deleting SYMTAB and its elements, which creates

use-after-free bugs. Thanks to GitHub user Cody Mello (melloc)

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/pat/, \n /pat/ {...} is now legal, though bad style to use.

added checks to new -v code that permits -vnospace; thanks to

ruslan ermilov for spotting this and providing the patch.

removed fixed limit on number of open files; thanks to aleksey

cheusov and christos zoulos.

fixed day 1 bug that resurrected deleted elements of ARGV when

used as filenames (in lib.c).

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and arnold robbins, changed srand() to return the previous

seed (which is 1 on the first call of srand). the seed is

an Awkfloat internally though converted to unsigned int to

pass to the library srand(). thanks, everyone.

fixed a subtle (and i hope low-probability) overflow error

in fldbld, by adding space for one extra \0. thanks to

robert bassett for spotting this one and providing a fix.

removed the files related to compilation on windows. i no

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Oct 23, 2007:

minor fix in lib.c: increase inputFS to 100, change malloc

for fields to n+1.

fixed memory fault caused by out of order test in setsval.

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core dump on linux with BEGIN {nextfile}, now fixed.

removed some #ifdef's in run.c and lex.c that appear to no

longer be necessary.

Apr 24, 2005:

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rethinking it.

Dec 31, 2004:

prevent overflow of -f array in main, head off potential error in

call of SYNTAX(), test malloc return in lib.c, all with thanks to

todd miller.

Dec 22, 2004:

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code known to man.

fixed a storage leak in call() that appears to have been there since

1983 or so -- a function without an explicit return that assigns a

string to a parameter leaked a Cell. thanks to moinak ghosh for

spotting this very subtle one.

Jul 31, 2003:

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radix character in programs and command line arguments regardless of

the locale; otherwise, the locale should prevail for input and output

of numbers. so it's intended to work that way.

i have rescinded the attempt to use strcoll in expanding shorthands in

regular expressions (cclenter). its properties are much too

surprising; for example [a-c] matches aAbBc in locale en_US but abBcC

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Jun 28, 2002:

modified run/format() and tran/getsval() to do a slightly better

job on using OFMT for output from print and CONVFMT for other

number->string conversions, as promised by posix and done by

gawk and mawk. there are still places where it doesn't work

right if CONVFMT is changed; by then the STR attribute of the

variable has been irrevocably set. thanks to arnold robbins for

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Jan 1, 2002:

fflush() or fflush("") flushes all files and pipes.

length(arrayname) returns number of elements; thanks to

arnold robbins for suggestion.

added a makefile.win to make it easier to build on windows.

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May 25, 2000:

yet another attempt at making 8-bit input work, with another

band-aid in b.c (member()), and some (uschar) casts to head

off potential errors in subscripts (like isdigit). also

changed HAT to NCHARS-2. thanks again to santiago vila.

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the test case.)

Apr 16, 1999:

with code kindly provided by Bruce Lilly, awk now parses

/=/ and similar constructs more sensibly in more places.

Bruce also provided some helpful test cases.

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Oct 19, 1998:

fixed a couple of bugs in getrec: could fail to update $0

after a getline var; because inputFS wasn't initialized,

could split $0 on every character, a misleading diversion.

fixed caching bug in makedfa: LRU was actually removing

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input file. (thanks to arnold robbins for inspiration and code).

small fixes to regexpr code: can now handle []], [[], and

variants; [] is now a syntax error, rather than matching

everything; [z-a] is now empty, not z. far from complete

or correct, however. (thanks to jeffrey friedl for pointing out

some awful behaviors.)