diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sigsuspend.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sigsuspend.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/sigsuspend.c b/sysdeps/unix/sysv/linux/sigsuspend.c index 723f7629ec..faea1c35e1 100644 --- a/sysdeps/unix/sysv/linux/sigsuspend.c +++ b/sysdeps/unix/sysv/linux/sigsuspend.c @@ -16,11 +16,18 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <errno.h> #include <signal.h> -#include <stddef.h> #include <unistd.h> extern int __syscall_sigsuspend (int, unsigned long int, unsigned long int); +extern int __syscall_rt_sigsuspend (sigset_t *, size_t); + + +/* The variable is shared between all wrappers around signal handling + functions which have RT equivalents. */ +int __libc_have_rt_sigs = 1; + /* Change the set of blocked signals to SET, wait until a signal arrives, and restore the set of blocked signals. */ @@ -28,10 +35,20 @@ int __sigsuspend (set) const sigset_t *set; { - /* XXX This will have to be changed once the kernel knows about - larger sigsets. */ - unsigned long int word = set->__val[0]; + /* First try the RT signals. */ + if (__libc_have_rt_sigs) + { + /* XXX The size argument hopefully will have to be changed to the + real size of the user-level sigset_t. */ + int result = __syscall_rt_sigsuspend (set, + _NSIG / (8 * sizeof (long int))); + + if (result >= 0 || errno != ENOSYS) + return result; + + __libc_have_rt_sigs = 0; + } - return __syscall_sigsuspend (0, 0, word); + return __syscall_sigsuspend (0, 0, set->__val[0]); } weak_alias (__sigsuspend, sigsuspend) |