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Diffstat (limited to 'sysdeps/unix/sysv/linux/sigaction.c')
-rw-r--r--sysdeps/unix/sysv/linux/sigaction.c27
1 files changed, 24 insertions, 3 deletions
diff --git a/sysdeps/unix/sysv/linux/sigaction.c b/sysdeps/unix/sysv/linux/sigaction.c
index a7b3e07dae..161f1b0529 100644
--- a/sysdeps/unix/sysv/linux/sigaction.c
+++ b/sysdeps/unix/sysv/linux/sigaction.c
@@ -25,6 +25,13 @@
extern int __syscall_sigaction (int, const struct kernel_sigaction *,
struct kernel_sigaction *);
+extern int __syscall_rt_signal (int, const struct sigaction *,
+ struct sigaction *, size_t);
+
+/* The variable is shared between all wrappers around signal handling
+ functions which have RT equivalents. It is defined in sigsuspend.c. */
+extern int __libc_have_rt_sigs;
+
/* If ACT is not NULL, change the action for SIG to *ACT.
If OACT is not NULL, put the old action for SIG in *OACT. */
@@ -34,12 +41,26 @@ __sigaction (sig, act, oact)
const struct sigaction *act;
struct sigaction *oact;
{
- struct kernel_sigaction k_sigact, k_osigact;
+ struct old_kernel_sigaction k_sigact, k_osigact;
int error;
+ /* 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_sigaction (sig, act, oact,
+ _NSIG / (8 * sizeof (long int)));
+
+ if (result >= 0 || errno != ENOSYS)
+ return result;
+
+ __libc_have_rt_sigs = 0;
+ }
+
if (act)
{
- k_sigact.sa_handler = act->sa_handler;
+ k_sigact.k_sa_handler = act->sa_handler;
k_sigact.sa_mask = act->sa_mask.__val[0];
k_sigact.sa_flags = act->sa_flags;
#ifdef HAVE_SA_RESTORER
@@ -50,7 +71,7 @@ __sigaction (sig, act, oact)
oact ? &k_osigact : 0);
if (oact && error >= 0)
{
- oact->sa_handler = k_osigact.sa_handler;
+ oact->sa_handler = k_osigact.k_sa_handler;
oact->sa_mask.__val[0] = k_osigact.sa_mask;
oact->sa_flags = k_osigact.sa_flags;
#ifdef HAVE_SA_RESTORER