diff options
Diffstat (limited to 'libc/sysdeps/linux/common/sigprocmask.c')
| -rw-r--r-- | libc/sysdeps/linux/common/sigprocmask.c | 50 |
1 files changed, 48 insertions, 2 deletions
diff --git a/libc/sysdeps/linux/common/sigprocmask.c b/libc/sysdeps/linux/common/sigprocmask.c index 70ff36606..3f42b09b8 100644 --- a/libc/sysdeps/linux/common/sigprocmask.c +++ b/libc/sysdeps/linux/common/sigprocmask.c @@ -18,8 +18,30 @@ _syscall4(int, __rt_sigprocmask, int, how, const sigset_t *, set, sigset_t *, oldset, size_t, size); -int sigprocmask(int how, const sigset_t * set, sigset_t * oldset) +int __sigprocmask(int how, const sigset_t * set, sigset_t * oldset) { +#ifdef SIGCANCEL + sigset_t local_newmask; + + /* + * The only thing we have to make sure here is that SIGCANCEL and + * SIGSETXID are not blocked. + */ + if (set != NULL && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) +# ifdef SIGSETXID + || __builtin_expect (__sigismember (set, SIGSETXID), 0) +# endif + )) + { + local_newmask = *set; + __sigdelset (&local_newmask, SIGCANCEL); +# ifdef SIGSETXID + __sigdelset (&local_newmask, SIGSETXID); +# endif + set = &local_newmask; + } +#endif + if (set && #if (SIG_BLOCK == 0) && (SIG_UNBLOCK == 1) && (SIG_SETMASK == 2) (((unsigned int) how) > 2) @@ -43,8 +65,30 @@ static inline _syscall3(int, __syscall_sigprocmask, int, how, const sigset_t *, set, sigset_t *, oldset); -int sigprocmask(int how, const sigset_t * set, sigset_t * oldset) +int __sigprocmask(int how, const sigset_t * set, sigset_t * oldset) { +#ifdef SIGCANCEL + sigset_t local_newmask; + + /* + * The only thing we have to make sure here is that SIGCANCEL and + * SIGSETXID are not blocked. + */ + if (set != NULL && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) +# ifdef SIGSETXID + || __builtin_expect (__sigismember (set, SIGSETXID), 0) +# endif + )) + { + local_newmask = *set; + __sigdelset (&local_newmask, SIGCANCEL); +# ifdef SIGSETXID + __sigdelset (&local_newmask, SIGSETXID); +# endif + set = &local_newmask; + } +#endif + if (set && #if (SIG_BLOCK == 0) && (SIG_UNBLOCK == 1) && (SIG_SETMASK == 2) (((unsigned int) how) > 2) @@ -60,3 +104,5 @@ int sigprocmask(int how, const sigset_t * set, sigset_t * oldset) return (__syscall_sigprocmask(how, set, oldset)); } #endif + +weak_alias (__sigprocmask, sigprocmask) |