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authorRich Felker <dalias@aerifal.cx>2019-08-05 19:55:42 -0400
committerRich Felker <dalias@aerifal.cx>2019-08-05 21:16:30 -0400
commitf522de81ac88dddb58266c15bcfaa044c4065e19 (patch)
tree10897524ab4ccb86b729adaba8363df914b531c2 /src
parent6818c31c9bc4bbad5357f1de14bedf781e5b349e (diff)
downloadmusl-f522de81ac88dddb58266c15bcfaa044c4065e19.tar.gz
use setitimer function rather than syscall to implement alarm
otherwise alarm will break on 32-bit archs when time_t is changed to 64-bit. a second itimerval object is introduced for retrieving the old value, since the setitimer function has restrict-qualified arguments.
Diffstat (limited to 'src')
-rw-r--r--src/unistd/alarm.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/unistd/alarm.c b/src/unistd/alarm.c
index 2e3263ac..a5e0c822 100644
--- a/src/unistd/alarm.c
+++ b/src/unistd/alarm.c
@@ -4,7 +4,7 @@
unsigned alarm(unsigned seconds)
{
- struct itimerval it = { .it_value.tv_sec = seconds };
- __syscall(SYS_setitimer, ITIMER_REAL, &it, &it);
- return it.it_value.tv_sec + !!it.it_value.tv_usec;
+ struct itimerval it = { .it_value.tv_sec = seconds }, old = { 0 };
+ setitimer(ITIMER_REAL, &it, &old);
+ return old.it_value.tv_sec + !!old.it_value.tv_usec;
}