summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/signal/sigtimedwait.c28
1 files changed, 24 insertions, 4 deletions
diff --git a/src/signal/sigtimedwait.c b/src/signal/sigtimedwait.c
index 7bcfe720..1287174e 100644
--- a/src/signal/sigtimedwait.c
+++ b/src/signal/sigtimedwait.c
@@ -2,11 +2,31 @@
#include <errno.h>
#include "syscall.h"
+#define IS32BIT(x) !((x)+0x80000000ULL>>32)
+#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
+
+static int do_sigtimedwait(const sigset_t *restrict mask, siginfo_t *restrict si, const struct timespec *restrict ts)
+{
+#ifdef SYS_rt_sigtimedwait_time64
+ time_t s = ts ? ts->tv_sec : 0;
+ long ns = ts ? ts->tv_nsec : 0;
+ int r = -ENOSYS;
+ if (SYS_rt_sigtimedwait == SYS_rt_sigtimedwait_time64 || !IS32BIT(s))
+ r = __syscall_cp(SYS_rt_sigtimedwait_time64, mask, si,
+ ts ? ((long long[]){s, ns}) : 0, _NSIG/8);
+ if (SYS_rt_sigtimedwait == SYS_rt_sigtimedwait_time64 || r!=-ENOSYS)
+ return r;
+ return __syscall_cp(SYS_rt_sigtimedwait, mask, si,
+ ts ? ((long[]){CLAMP(s), ns}) : 0, _NSIG/8);;
+#else
+ return __syscall_cp(SYS_rt_sigtimedwait, mask, si, ts, _NSIG/8);
+#endif
+}
+
int sigtimedwait(const sigset_t *restrict mask, siginfo_t *restrict si, const struct timespec *restrict timeout)
{
int ret;
- do ret = syscall_cp(SYS_rt_sigtimedwait, mask,
- si, timeout, _NSIG/8);
- while (ret<0 && errno==EINTR);
- return ret;
+ do ret = do_sigtimedwait(mask, si, timeout);
+ while (ret==-EINTR);
+ return __syscall_ret(ret);
}