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-rw-r--r--libc/unistd/usleep.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/libc/unistd/usleep.c b/libc/unistd/usleep.c
index 75458b1..19e8ee8 100644
--- a/libc/unistd/usleep.c
+++ b/libc/unistd/usleep.c
@@ -28,7 +28,7 @@
#include <time.h>
#include <errno.h>
-void usleep(unsigned long usec)
+int usleep(unsigned long usec)
{
struct timespec ts;
@@ -43,10 +43,13 @@ void usleep(unsigned long usec)
for (;;)
{
- if ( nanosleep( &ts, &ts ) >= 0 )
- break;
+ if ( nanosleep( &ts, &ts ) == 0 )
+ return 0;
+ // We try again if the nanosleep failure is EINTR.
+ // The other possible failures are EINVAL (which we should pass through),
+ // and ENOSYS, which doesn't happen.
if ( errno != EINTR )
- break;
+ return -1;
}
}