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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
..
atf Update Makefile.depend files 2019-12-11 17:37:53 +00:00
clang Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp 2020-07-21 17:34:05 +00:00
csu Include ABI note tag in shared libraries. 2020-07-16 21:58:43 +00:00
geom geli(8): Add missing commands in the EXAMPLES section 2020-07-22 13:00:56 +00:00
googletest Another round of attempting to squelch -Wdeprecated-declarations, which 2019-09-17 06:07:08 +00:00
kyua Install expected kyua docs. 2020-03-26 17:34:17 +00:00
lib80211 Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libalias libalias: retire cuseeme support 2020-05-16 02:29:10 +00:00
libarchive MFV r361280: 2020-05-20 20:58:48 +00:00
libauditd libauditd: make it a PRIVATELIB 2020-04-19 02:20:39 +00:00
libbe libbe: annotate lbh as __unused in be_is_auto_snapshot_name 2020-07-22 02:09:10 +00:00
libbearssl Revert that! 2020-07-19 23:56:19 +00:00
libbegemot Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libblacklist Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libblocksruntime Move all sources from the llvm project into contrib/llvm-project. 2019-12-20 19:53:05 +00:00
libbluetooth Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libbsdstat Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libbsm libbsm: fix some MLINKS 2020-04-19 02:18:40 +00:00
libbsnmp Merge release 1.14 of bsnmp. 2020-04-01 15:25:16 +00:00
libbz2 Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libc regex(3): Interpret many escaped ordinary characters as EESCAPE 2020-07-29 23:21:56 +00:00
libc_nonshared
libc++ Remove -mlong-calls vhen building arm libraries and llvm. 2020-03-10 06:49:43 +00:00
libc++experimental Move all sources from the llvm project into contrib/llvm-project. 2019-12-20 19:53:05 +00:00
libcalendar Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libcam Clean up cam.3 2020-07-06 09:53:00 +00:00
libcapsicum capsicum_helpers: split stream cap bits out of caph_limit_stream() 2020-01-02 23:07:45 +00:00
libcasper Fix trailing-comma-related typos in the tree when the Xr macro is used 2020-06-27 11:13:45 +00:00
libclang_rt Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp 2020-05-23 10:32:18 +00:00
libcom_err Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libcompat ftime appeared in 7th Edition Unix to replace gtime. 2018-10-28 02:58:15 +00:00
libcompiler_rt Merge ^/head r357662 through r357854. 2020-02-13 12:52:24 +00:00
libcrypt Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libcuse Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libcxxrt Revert r353140: Re-add ALLOW_MIPS_SHARED_TEXTREL, sprinkle it around 2020-01-14 17:50:13 +00:00
libdevctl Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libdevdctl libdevdctl: Force full match of "timestamp" field name 2020-06-23 16:29:59 +00:00
libdevinfo Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libdevstat Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libdl
libdpv Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libdwarf Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libedit Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libefivar libefivar: define MDE_CPU_RISCV64 2020-07-06 17:47:29 +00:00
libelf Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libelftc Update ELF Tool Chain to upstream r3769 2019-12-05 13:20:15 +00:00
libevent1 rename in-tree libevent v1 to libevent1 2020-05-28 22:05:50 +00:00
libexecinfo Move all sources from the llvm project into contrib/llvm-project. 2019-12-20 19:53:05 +00:00
libexpat Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libfetch fetch(3): plug some leaks 2020-02-21 18:21:57 +00:00
libfigpar Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libgcc_eh Revert r353140: Re-add ALLOW_MIPS_SHARED_TEXTREL, sprinkle it around 2020-01-14 17:50:13 +00:00
libgcc_s Remove the SYMVER build option. 2020-04-30 22:08:40 +00:00
libgeom Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libgpio Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libgssapi Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libiconv_modules libiconv: correct undefined behavior. 2018-07-08 23:22:04 +00:00
libifconfig libifconfig: Add function to get bridge status 2020-07-01 02:32:41 +00:00
libipsec Refer to AES-CBC as "aes-cbc" rather than "rijndael-cbc" for IPsec. 2020-06-04 22:58:37 +00:00
libipt Update Intel Processor Trace decoder library. 2019-10-10 12:46:34 +00:00
libjail libjail: Handle an error from reallocarray() when trimming the buffer. 2020-01-07 21:44:27 +00:00
libkiconv pkgbase: Put a lot of binaries and lib in FreeBSD-runtime 2019-09-05 14:13:08 +00:00
libkvm test: add libkvm read test 2020-07-08 18:58:44 +00:00
libldns Update Makefile.depend files 2019-12-11 17:37:53 +00:00
liblua liblua: ensure that "require" will fail in bootstrap flua 2020-04-29 13:41:32 +00:00
liblutok Add liblutok a lightweight C++ API for lua. 2020-03-23 18:26:23 +00:00
liblzma liblzma: Make liblzma use libmd implementation of SHA256. 2020-06-20 21:32:07 +00:00
libmagic Fix installation of magic file. 2020-06-17 15:57:59 +00:00
libmd libmd: temporarily disable optimized assembly skein1024 implementation 2020-07-23 18:55:47 +00:00
libmemstat Use per-domain locks for the bucket cache. 2020-02-19 18:48:46 +00:00
libmilter Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libmp Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libmt Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libnetbsd Make timespecadd(3) and friends public 2018-07-30 15:46:40 +00:00
libnetgraph Fix SYNPOSIS section to point to the proper include directive. 2020-05-15 12:04:39 +00:00
libngatm Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libnv Fix libnv build post rename 2020-06-27 02:17:04 +00:00
libomp Update build glue for libomp. 2020-01-27 18:04:28 +00:00
libopenbsd Allow bootstrapping libopenbsd on Linux 2018-12-05 10:58:02 +00:00
libopencsd Update opencsd to 0.14.2 2020-06-17 10:42:20 +00:00
libopie Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libpam pkgbase: Move telnetd and ftpd pam file to the utilities package 2020-03-24 01:08:06 +00:00
libpathconv
libpcap MFV r353141 (by phillip): 2019-12-21 21:01:03 +00:00
libpe
libpjdlog pkgbase: Create a FreeBSD-utilities package and make it the default one 2019-09-05 14:15:47 +00:00
libpmc libpmc: Use known pmc_cpuid buffer size 2020-07-28 02:56:26 +00:00
libpmcstat pmc: Add include path for libpmcstat as it is an internallib 2020-03-25 01:32:16 +00:00
libproc Re-enable proc_test:symbol_lookup after r360979. 2020-05-12 17:05:55 +00:00
libprocstat libprocstat: fix kvm filedesc access after introduction of fdescenttbl 2020-07-15 10:13:23 +00:00
libradius libradius: Rip out dubious use of srandomdev(3)+random(3) 2019-12-13 04:55:17 +00:00
libregex Further normalize copyright notices 2019-09-26 16:19:22 +00:00
librpcsec_gss
librpcsvc Update Makefile.depend files 2019-12-11 17:37:53 +00:00
librss Update Makefile.depend files 2019-12-11 17:37:53 +00:00
librt pkgbase: Create a FreeBSD-utilities package and make it the default one 2019-09-05 14:15:47 +00:00
librtld_db librtld_db: Handle anonymous mappings below the first file mapping. 2020-06-05 18:44:14 +00:00
libsbuf Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libsdp Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libsecureboot Revert that! 2020-07-19 23:56:19 +00:00
libsm Merge sendmail 8.16.1 to HEAD: See contrib/sendmail/RELEASE_NOTES for details 2020-07-15 18:28:54 +00:00
libsmb Move nsmb.conf to lib/libsmb/ 2018-09-20 09:31:27 +00:00
libsmdb Merge sendmail 8.16.1 to HEAD: See contrib/sendmail/RELEASE_NOTES for details 2020-07-15 18:28:54 +00:00
libsmutil
libsqlite3 Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libssp libssp: don't compile with -fstack-protector* 2020-03-14 15:15:27 +00:00
libssp_nonshared Provide libssp based on libc 2020-01-04 20:19:25 +00:00
libstats Make use of the stats(3) framework in the TCP stack. 2019-12-02 20:58:04 +00:00
libstdbuf
libstdthreads Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libsysdecode Retire procfs-based process debugging. 2020-04-01 19:22:09 +00:00
libtacplus libtacplus: Remove bogus srandomdev+random 2019-12-13 05:11:34 +00:00
libtelnet
libthr Add pthread_getname_np() and pthread_setname_np() aliases for 2020-06-10 22:13:24 +00:00
libthread_db Remove libthr, csu, libthread_db and testfloat sparc64 specific directories. 2020-02-27 04:44:58 +00:00
libucl Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libufs Correctly describe the return values for the libufs library sbget() 2020-06-23 21:37:12 +00:00
libugidfw Deduplicate fsid comparisons 2020-05-21 01:55:35 +00:00
libulog Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libunbound MFV r361322: 2020-05-21 21:00:46 +00:00
libusb libusb: improve compatibility 2020-06-09 17:17:43 +00:00
libusbhid USB HID descriptors may push/pop the current state to allow 2020-06-05 07:57:16 +00:00
libutil Add CAP_EVENT to pidfiles. 2020-06-25 21:34:43 +00:00
libveriexec Do not claim libbearssl et al are INTERNALLIB 2020-04-01 05:45:12 +00:00
libvgl Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libvmmapi vmm(4), bhyve(8): Expose kernel-emulated special devices to userspace 2020-05-15 15:54:22 +00:00
libwrap Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libxo Fix installation of libxo encoder modules. 2020-05-31 17:20:17 +00:00
liby liby: rewrite yyerror.h 2018-06-17 18:05:27 +00:00
libypclnt Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libz Generate zlib.pc from source. 2020-05-12 01:47:33 +00:00
libzstd Update to Zstandard 1.4.5 2020-05-23 21:23:46 +00:00
msun Enable long double tests on RISC-V 2020-06-24 13:11:19 +00:00
ncurses ncurses: bump shlib number to version 9 2020-02-20 09:12:07 +00:00
ofed Update Makefile.depend files 2019-12-11 17:37:53 +00:00
tests
Makefile rename in-tree libevent v1 to libevent1 2020-05-28 22:05:50 +00:00
Makefile.inc