freebsd-nq/contrib/netbsd-tests/lib
Kyle Evans adeebf4cd4 regex(3): Interpret many escaped ordinary characters as EESCAPE
In IEEE 1003.1-2008 [1] and earlier revisions, BRE/ERE grammar allows for
any character to be escaped, but "ORD_CHAR preceded by an unescaped
<backslash> character [gives undefined results]".

Historically, we've interpreted an escaped ordinary character as the
ordinary character itself. This becomes problematic when some extensions
give special meanings to an otherwise ordinary character
(e.g. GNU's \b, \s, \w), meaning we may have two different valid
interpretations of the same sequence.

To make this easier to deal with and given that the standard calls this
undefined, we should throw an error (EESCAPE) if we run into this scenario
to ease transition into a state where some escaped ordinaries are blessed
with a special meaning -- it will either error out or have extended
behavior, rather than have two entirely different versions of undefined
behavior that leave the consumer of regex(3) guessing as to what behavior
will be used or leaving them with false impressions.

This change bumps the symbol version of regcomp to FBSD_1.6 and provides the
old escape semantics for legacy applications, just in case one has an older
application that would immediately turn into a pumpkin because of an
extraneous escape that's embedded or otherwise critical to its operation.

This is the final piece needed before enhancing libregex with GNU extensions
and flipping the switch on bsdgrep.

[1] http://pubs.opengroup.org/onlinepubs/9699919799.2016edition/

PR:		229925 (exp-run, courtesy of antoine)
Differential Revision:	https://reviews.freebsd.org/D10510
2020-07-29 23:21:56 +00:00
..
csu
libbluetooth
libbpfjit Checkpoint initial integration work 2016-08-12 08:50:05 +00:00
libc regex(3): Interpret many escaped ordinary characters as EESCAPE 2020-07-29 23:21:56 +00:00
libcrypt
libcurses Checkpoint initial integration work 2016-08-12 08:50:05 +00:00
libdes
libevent
libexecinfo Temporarily disable failing case in CI of amd64: 2020-05-18 12:36:28 +00:00
libm Amend r343442, by only expecting the lib.msun.cbrt_test.cbrtl_powl and 2019-02-08 18:31:54 +00:00
libobjc
libposix Merge content currently under test from ^/vendor/NetBSD/tests/dist/@r312123 2017-01-14 06:49:17 +00:00
libppath
libprop
libpthread Update pthread_cond_timedwait() test to current NetBSD 2019-08-16 13:10:08 +00:00
libpthread_dbg Merge content currently under test from ^/vendor/NetBSD/tests/dist/@r312123 2017-01-14 06:49:17 +00:00
librefuse Merge content currently under test from ^/vendor/NetBSD/tests/dist/@r312123 2017-01-14 06:49:17 +00:00
librt Add sem_clockwait_np() 2017-02-23 19:36:38 +00:00
librumpclient Merge content currently under test from ^/vendor/NetBSD/tests/dist/@r312123 2017-01-14 06:49:17 +00:00
librumphijack Upgrade NetBSD tests to 01.11.2017_23.20 snapshot 2017-01-13 03:33:57 +00:00
libskey
libsljit
libusbhid Upgrade NetBSD tests to 01.11.2017_23.20 snapshot 2017-01-13 03:33:57 +00:00
libutil Checkpoint initial integration work 2016-08-12 08:50:05 +00:00
semaphore Merge content currently under test from ^/vendor/NetBSD/tests/dist/@r312123 2017-01-14 06:49:17 +00:00