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Diffstat (limited to 'sysdeps/unix/sysv/linux/sigsuspend.c')
-rw-r--r--sysdeps/unix/sysv/linux/sigsuspend.c27
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)