1 files changed, 26 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/signal/setitimer.c b/libc-top-half/musl/src/signal/setitimer.c
new file mode 100644
index 0000000..0dfbeb4
--- /dev/null
+++ b/libc-top-half/musl/src/signal/setitimer.c
@@ -0,0 +1,26 @@
+#include <sys/time.h>
+#include <errno.h>
+#include "syscall.h"
+
+#define IS32BIT(x) !((x)+0x80000000ULL>>32)
+
+int setitimer(int which, const struct itimerval *restrict new, struct itimerval *restrict old)
+{
+	if (sizeof(time_t) > sizeof(long)) {
+		time_t is = new->it_interval.tv_sec, vs = new->it_value.tv_sec;
+		long ius = new->it_interval.tv_usec, vus = new->it_value.tv_usec;
+		if (!IS32BIT(is) || !IS32BIT(vs))
+			return __syscall_ret(-ENOTSUP);
+		long old32[4];
+		int r = __syscall(SYS_setitimer, which,
+			((long[]){is, ius, vs, vus}), old32);
+		if (!r && old) {
+			old->it_interval.tv_sec = old32[0];
+			old->it_interval.tv_usec = old32[1];
+			old->it_value.tv_sec = old32[2];
+			old->it_value.tv_usec = old32[3];
+		}
+		return __syscall_ret(r);
+	}
+	return syscall(SYS_setitimer, which, new, old);
+}