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Carlos O'Donell a39208bd7f CVE-2014-7817: wordexp fails to honour WRDE_NOCMD. 
The function wordexp() fails to properly handle the WRDE_NOCMD
flag when processing arithmetic inputs in the form of "$((... ``))"
where "..." can be anything valid. The backticks in the arithmetic
epxression are evaluated by in a shell even if WRDE_NOCMD forbade
command substitution. This allows an attacker to attempt to pass
dangerous commands via constructs of the above form, and bypass
the WRDE_NOCMD flag. This patch fixes this by checking for WRDE_NOCMD
in exec_comm(), the only place that can execute a shell. All other
checks for WRDE_NOCMD are superfluous and removed.

We expand the testsuite and add 3 new regression tests of roughly
the same form but with a couple of nested levels.

On top of the 3 new tests we add fork validation to the WRDE_NOCMD
testing. If any forks are detected during the execution of a wordexp()
call with WRDE_NOCMD, the test is marked as failed. This is slightly
heuristic since vfork might be used in the future, but it provides a
higher level of assurance that no shells were executed as part of
command substitution with WRDE_NOCMD in effect. In addition it doesn't
require libpthread or libdl, instead we use the public implementation
namespace function __register_atfork (already part of the public ABI
for libpthread).

Tested on x86_64 with no regressions.
2014-11-19 14:35:03 -05:00
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bits
Complete _BSD_SOURCE / _SVID_source followup cleanup.
2014-02-21 21:45:26 +00:00
rxspencer
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sys
Complete _BSD_SOURCE / _SVID_source followup cleanup.
2014-02-21 21:45:26 +00:00
_exit.c
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2014-01-01 22:00:23 +10:00
alarm.c
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2014-01-01 22:00:23 +10:00
annexc.c
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2014-01-01 22:00:23 +10:00
BOOST.tests
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bsd-getpgrp.c
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2014-01-01 22:00:23 +10:00
bug-ga1.c
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bug-ga2.c
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bug-getopt1.c
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bug-getopt2.c
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bug-getopt3.c
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bug-getopt4.c
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bug-getopt5.c
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bug-glob1.c
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bug-glob2.c
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2014-01-01 22:00:23 +10:00
bug-glob3.c
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bug-regex1.c
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bug-regex2.c
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2014-01-01 22:00:23 +10:00
bug-regex3.c
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2014-01-01 22:00:23 +10:00
bug-regex4.c
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2014-01-01 22:00:23 +10:00
bug-regex5.c
Add #include <stdint.h> for uint[32|64]_t usage (except installed headers).
2013-05-16 11:32:54 -05:00
bug-regex6.c
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2014-01-01 22:00:23 +10:00
bug-regex7.c
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bug-regex8.c
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bug-regex9.c
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bug-regex10.c
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bug-regex11.c
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bug-regex12.c
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bug-regex13.c
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bug-regex14.c
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2014-01-01 22:00:23 +10:00
bug-regex15.c
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bug-regex16.c
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bug-regex17.c
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bug-regex18.c
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bug-regex19.c
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bug-regex20.c
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bug-regex21.c
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bug-regex22.c
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bug-regex23.c
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bug-regex24.c
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bug-regex25.c
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bug-regex26.c
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bug-regex27.c
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bug-regex28.c
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bug-regex29.c
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bug-regex30.c
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bug-regex31.c
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bug-regex31.input
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bug-regex32.c
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bug-regex33.c
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2014-01-01 22:00:23 +10:00
bug-regex34.c
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2014-01-01 22:00:23 +10:00
bug-regex35.c
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2014-01-01 22:00:23 +10:00
bug-regex36.c
Fix another memory leak in regexp compiler (BZ #17069)
2014-06-20 14:03:40 +02:00
confstr.c
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2014-01-01 22:00:23 +10:00
cpio.h
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2014-01-01 22:00:23 +10:00
Depend
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environ.c
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execl.c
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execle.c
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execlp.c
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execv.c
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execve.c
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execvp.c
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execvpe.c
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fexecve.c
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2014-01-01 22:00:23 +10:00
fnmatch_loop.c
Move findidx nested functions to top-level.
2014-09-11 16:02:17 -07:00
fnmatch.c
Move findidx nested functions to top-level.
2014-09-11 16:02:17 -07:00
fnmatch.h
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2014-01-01 22:00:23 +10:00
fork.c
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fpathconf.c
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2014-01-01 22:00:23 +10:00
gai_strerror.c
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2014-01-01 22:00:23 +10:00
gai.conf
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get_child_max.c
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2014-01-01 22:00:23 +10:00
getaddrinfo.c
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2014-01-01 22:00:23 +10:00
getconf-speclist.c
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2014-01-01 22:00:23 +10:00
getconf.c
Assume that all _[PS]C_* and _CS_* macros are always defined
2014-09-16 22:18:20 +05:30
getegid.c
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2014-01-01 22:00:23 +10:00
geteuid.c
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getgid.c
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getgroups.c
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getopt1.c
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getopt_init.c
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getopt_int.h
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getopt.c
Use glibc_likely instead __builtin_expect.
2014-02-10 15:07:12 +01:00
getopt.h
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2014-01-01 22:00:23 +10:00
getpgid.c
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2014-01-01 22:00:23 +10:00
getpgrp.c
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2014-01-01 22:00:23 +10:00
getpid.c
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getppid.c
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getresgid.c
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getresuid.c
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getsid.c
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getuid.c
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glob64.c
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2014-01-01 22:00:23 +10:00
glob.c
Use glibc_likely instead __builtin_expect.
2014-02-10 15:07:12 +01:00
glob.h
Complete _BSD_SOURCE / _SVID_source followup cleanup.
2014-02-21 21:45:26 +00:00
globtest.c
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2014-01-01 22:00:23 +10:00
globtest.sh
Remove redundant C locale settings.
2014-06-07 19:58:36 +00:00
group_member.c
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2014-01-01 22:00:23 +10:00
init-posix.c
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Makefile
Fix memory leak in regexp compiler (BZ #17069)
2014-06-19 19:00:03 +02:00
nanosleep.c
Remove __libc_nanosleep function name.
2014-11-01 12:26:09 +00:00
pathconf.c
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2014-01-01 22:00:23 +10:00
pause.c
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2014-01-01 22:00:23 +10:00
PCRE.tests
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posix_madvise.c
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2014-01-01 22:00:23 +10:00
posix-envs.def
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pread64.c
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pread.c
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ptestcases.h
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PTESTS
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PTESTS2C.sed
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pwrite64.c
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2014-01-01 22:00:23 +10:00
pwrite.c
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2014-01-01 22:00:23 +10:00
re_comp.h
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2014-01-01 22:00:23 +10:00
regcomp.c
Move findidx nested functions to top-level.
2014-09-11 16:02:17 -07:00
regex_internal.c
Check if DEBUG is defined in regex_internal.c
2014-08-01 14:24:41 +05:30
regex_internal.h
Remove unused include
2014-11-04 15:32:07 +01:00
regex.c
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2014-01-01 22:00:23 +10:00
regex.h
Combine __USE_BSD and __USE_SVID into __USE_MISC.
2014-02-12 23:41:01 +00:00
regexbug1.c
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regexec.c
Move findidx nested functions to top-level.
2014-09-11 16:02:17 -07:00
runptests.c
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runtests.c
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sched_cpualloc.c
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sched_cpucount.c
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sched_cpufree.c
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sched_getaffinity.c
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sched_getp.c
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sched_gets.c
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sched_primax.c
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sched_primin.c
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sched_rr_gi.c
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sched_setaffinity.c
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sched_setp.c
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sched_sets.c
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2014-01-01 22:00:23 +10:00
sched_yield.c
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2014-01-01 22:00:23 +10:00
sched.h
Include all of <time.h> from <sched.h> for older standards (bug 16670).
2014-03-07 20:54:03 +00:00
setgid.c
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2014-01-01 22:00:23 +10:00
setpgid.c
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2014-01-01 22:00:23 +10:00
setpgrp.c
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setresgid.c
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2014-01-01 22:00:23 +10:00
setresuid.c
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setsid.c
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setuid.c
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2014-01-01 22:00:23 +10:00
sleep.c
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2014-01-01 22:00:23 +10:00
spawn_faction_addclose.c
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2014-01-01 22:00:23 +10:00
spawn_faction_adddup2.c
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2014-01-01 22:00:23 +10:00
spawn_faction_addopen.c
Add missing #include in spawn_faction_addopen.c
2014-06-26 13:21:58 -07:00
spawn_faction_destroy.c
posix_spawn_file_actions_addopen needs to copy the path argument (BZ 17048)
2014-06-11 23:13:42 +02:00
spawn_faction_init.c
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2014-01-01 22:00:23 +10:00
spawn_int.h
posix_spawn_file_actions_addopen needs to copy the path argument (BZ 17048)
2014-06-11 23:13:42 +02:00
spawn.c
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2014-01-01 22:00:23 +10:00
spawn.h
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2014-01-01 22:00:23 +10:00
spawnattr_destroy.c
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2014-01-01 22:00:23 +10:00
spawnattr_getdefault.c
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2014-01-01 22:00:23 +10:00
spawnattr_getflags.c
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2014-01-01 22:00:23 +10:00
spawnattr_getpgroup.c
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2014-01-01 22:00:23 +10:00
spawnattr_getschedparam.c
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2014-01-01 22:00:23 +10:00
spawnattr_getschedpolicy.c
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2014-01-01 22:00:23 +10:00
spawnattr_getsigmask.c
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2014-01-01 22:00:23 +10:00
spawnattr_init.c
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2014-01-01 22:00:23 +10:00
spawnattr_setdefault.c
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2014-01-01 22:00:23 +10:00
spawnattr_setflags.c
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spawnattr_setpgroup.c
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spawnattr_setschedparam.c
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spawnattr_setschedpolicy.c
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2014-01-01 22:00:23 +10:00
spawnattr_setsigmask.c
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2014-01-01 22:00:23 +10:00
spawni.c
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2014-01-01 22:00:23 +10:00
spawnp.c
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2014-01-01 22:00:23 +10:00
sysconf.c
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2014-01-01 22:00:23 +10:00
tar.h
Define TSVTX in tar.h for older POSIX (bug 16978).
2014-05-23 20:37:40 +00:00
test-vfork.c
Use (void) in no-arguments function definitions.
2013-06-08 00:22:23 +00:00
testcases.h
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testfnm.c
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TESTS
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TESTS2C.sed
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times.c
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2014-01-01 22:00:23 +10:00
transbug.c
Fix executable mode.
2013-06-06 02:15:33 +02:00
tst-boost.c
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2014-01-01 22:00:23 +10:00
tst-chmod.c
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2014-01-01 22:00:23 +10:00
tst-cpucount.c
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tst-cpuset.c
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tst-dir.c
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2014-01-01 22:00:23 +10:00
tst-exec-static.c
Support run tst-exec and tst-spawn directly
2013-01-10 14:14:55 -08:00
tst-exec.c
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2014-01-01 22:00:23 +10:00
tst-execl1.c
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tst-execl2.c
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tst-execle1.c
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tst-execle2.c
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tst-execlp1.c
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tst-execlp2.c
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tst-execv1.c
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tst-execv2.c
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tst-execve1.c
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tst-execve2.c
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tst-execvp1.c
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tst-execvp2.c
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tst-execvp3.c
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tst-execvp4.c
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tst-fnmatch2.c
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tst-fnmatch3.c
Don't read past end of pattern in fnmatch (BZ #17062)
2014-06-18 14:20:02 +02:00
tst-fnmatch.c
Modify several tests to use test-skeleton.c
2014-11-05 15:24:08 +05:30
tst-fnmatch.input
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2014-01-01 22:00:23 +10:00
tst-fork.c
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2014-01-01 22:00:23 +10:00
tst-getaddrinfo2.c
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tst-getaddrinfo3.c
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tst-getaddrinfo4.c
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2014-01-01 22:00:23 +10:00
tst-getaddrinfo.c
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2014-01-01 22:00:23 +10:00
tst-getconf.sh
Don't require test wrappers to preserve environment variables, use more consistent environment.
2014-06-06 22:19:27 +00:00
tst-getlogin.c
Modify several tests to use test-skeleton.c
2014-11-05 15:24:08 +05:30
tst-getopt_long1.c
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tst-gnuglob.c
Modify several tests to use test-skeleton.c
2014-11-05 15:24:08 +05:30
tst-mmap.c
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2014-11-05 15:24:08 +05:30
tst-nanosleep.c
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2014-01-01 22:00:23 +10:00
tst-nice.c
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2014-01-01 22:00:23 +10:00
tst-pathconf.c
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2014-01-01 22:00:23 +10:00
tst-pcre.c
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2014-01-01 22:00:23 +10:00
tst-preadwrite64.c
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2014-01-01 22:00:23 +10:00
tst-preadwrite.c
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2014-01-01 22:00:23 +10:00
tst-regex2.c
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tst-regex.c
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2014-01-01 22:00:23 +10:00
tst-regexloc.c
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2014-01-01 22:00:23 +10:00
tst-rfc3484-2.c
Fix qsort_r namespace (bug 17571).
2014-11-12 22:33:41 +00:00
tst-rfc3484-3.c
Fix qsort_r namespace (bug 17571).
2014-11-12 22:33:41 +00:00
tst-rfc3484.c
Fix qsort_r namespace (bug 17571).
2014-11-12 22:33:41 +00:00
tst-rxspencer-no-utf8.c
Split up rules for tests using mtrace and something else.
2014-02-14 13:45:14 +00:00
tst-rxspencer.c
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2014-01-01 22:00:23 +10:00
tst-spawn-static.c
Support run tst-exec and tst-spawn directly
2013-01-10 14:14:55 -08:00
tst-spawn.c
posix_spawn_file_actions_addopen needs to copy the path argument (BZ 17048)
2014-06-11 23:13:42 +02:00
tst-sysconf.c
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tst-truncate64.c
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tst-truncate.c
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2014-01-01 22:00:23 +10:00
tst-vfork1.c
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2014-01-01 22:00:23 +10:00
tst-vfork2.c
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2014-01-01 22:00:23 +10:00
tst-vfork3.c
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2014-01-01 22:00:23 +10:00
tst-waitid.c
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2014-01-01 22:00:23 +10:00
tstgetopt.c
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uname.c
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2014-01-01 22:00:23 +10:00
unistd.h
Complete _BSD_SOURCE / _SVID_source followup cleanup.
2014-02-21 21:45:26 +00:00
Versions
Move getlogin, getlogin_r, setlogin to login/ subdir.
2013-05-06 15:10:09 -07:00
vfork.c
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2014-01-01 22:00:23 +10:00
wait3.c
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2014-01-01 22:00:23 +10:00
wait4.c
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2014-01-01 22:00:23 +10:00
wait.c
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2014-01-01 22:00:23 +10:00
wait.h
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waitid.c
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2014-01-01 22:00:23 +10:00
waitpid.c
Remove __libc_waitpid function name.
2014-11-07 01:27:16 +00:00
wordexp-test.c
CVE-2014-7817: wordexp fails to honour WRDE_NOCMD.
2014-11-19 14:35:03 -05:00
wordexp-tst.sh
Don't require test wrappers to preserve environment variables, use more consistent environment.
2014-06-06 22:19:27 +00:00
wordexp.c
CVE-2014-7817: wordexp fails to honour WRDE_NOCMD.
2014-11-19 14:35:03 -05:00
wordexp.h
Update copyright notices with scripts/update-copyrights
2014-01-01 22:00:23 +10:00