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Merge from gnulib.

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2012-07-15 pthread_sigmask: fix bug on FreeBSD 9 (Bug#11884)
2012-07-11 gettext: do not assume '#define ... defined ...' behavior
This commit is contained in:
Paul Eggert 2012-07-15 11:18:37 -07:00
parent ce811ad975
commit b6e9e0ffac
3 changed files with 37 additions and 5 deletions
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27
lib/pthread_sigmask.c
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@ -22,6 +22,10 @@
#include <errno.h>
#include <stddef.h>
#if PTHREAD_SIGMASK_INEFFECTIVE
# include <string.h>
#endif
#if PTHREAD_SIGMASK_UNBLOCK_BUG
# include <unistd.h>
#endif
@ -31,7 +35,22 @@ pthread_sigmask (int how, const sigset_t *new_mask, sigset_t *old_mask)
#undef pthread_sigmask
{
#if HAVE_PTHREAD_SIGMASK
int ret = pthread_sigmask (how, new_mask, old_mask);
int ret;
# if PTHREAD_SIGMASK_INEFFECTIVE
sigset_t omask, omask_copy;
sigset_t *old_mask_ptr = &omask;
sigemptyset (&omask);
/* Add a signal unlikely to be blocked, so that OMASK_COPY
is unlikely to match the actual mask. */
sigaddset (&omask, SIGILL);
memcpy (&omask_copy, &omask, sizeof omask);
# else
sigset_t *old_mask_ptr = old_mask;
# endif
ret = pthread_sigmask (how, new_mask, old_mask_ptr);
# if PTHREAD_SIGMASK_INEFFECTIVE
if (ret == 0)
{
@ -39,12 +58,16 @@ pthread_sigmask (int how, const sigset_t *new_mask, sigset_t *old_mask)
Don't cache the information: libpthread.so could be dynamically
loaded after the program started and after pthread_sigmask was
called for the first time. */
if (pthread_sigmask (1729, NULL, NULL) == 0)
if (memcmp (&omask_copy, &omask, sizeof omask) == 0
&& pthread_sigmask (1729, &omask_copy, NULL) == 0)
{
/* pthread_sigmask is currently ineffective. The program is not
linked to -lpthread. So use sigprocmask instead. */
return (sigprocmask (how, new_mask, old_mask) < 0 ? errno : 0);
}
if (old_mask)
memcpy (old_mask, &omask, sizeof omask);
}
# endif
# if PTHREAD_SIGMASK_FAILS_WITH_ERRNO