1 files changed, 60 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/stat/utimensat.c b/libc-top-half/musl/src/stat/utimensat.c
new file mode 100644
index 0000000..730723a
--- /dev/null
+++ b/libc-top-half/musl/src/stat/utimensat.c
@@ -0,0 +1,60 @@
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "syscall.h"
+
+#define IS32BIT(x) !((x)+0x80000000ULL>>32)
+#define NS_SPECIAL(ns) ((ns)==UTIME_NOW || (ns)==UTIME_OMIT)
+
+int utimensat(int fd, const char *path, const struct timespec times[2], int flags)
+{
+	int r;
+	if (times && times[0].tv_nsec==UTIME_NOW && times[1].tv_nsec==UTIME_NOW)
+		times = 0;
+#ifdef SYS_utimensat_time64
+	r = -ENOSYS;
+	time_t s0=0, s1=0;
+	long ns0=0, ns1=0;
+	if (times) {
+		ns0 = times[0].tv_nsec;
+		ns1 = times[1].tv_nsec;
+		if (!NS_SPECIAL(ns0)) s0 = times[0].tv_sec;
+		if (!NS_SPECIAL(ns1)) s1 = times[1].tv_sec;
+	}
+	if (SYS_utimensat == SYS_utimensat_time64 || !IS32BIT(s0) || !IS32BIT(s1))
+		r = __syscall(SYS_utimensat_time64, fd, path, times ?
+			((long long[]){s0, ns0, s1, ns1}) : 0, flags);
+	if (SYS_utimensat == SYS_utimensat_time64 || r!=-ENOSYS)
+		return __syscall_ret(r);
+	if (!IS32BIT(s0) || !IS32BIT(s1))
+		return __syscall_ret(-ENOTSUP);
+	r = __syscall(SYS_utimensat, fd, path,
+		times ? ((long[]){s0, ns0, s1, ns1}) : 0, flags);
+#else
+	r = __syscall(SYS_utimensat, fd, path, times, flags);
+#endif
+
+#ifdef SYS_futimesat
+	if (r != -ENOSYS || flags) return __syscall_ret(r);
+	long *tv=0, tmp[4];
+	if (times) {
+		int i;
+		tv = tmp;
+		for (i=0; i<2; i++) {
+			if (times[i].tv_nsec >= 1000000000ULL) {
+				if (NS_SPECIAL(times[i].tv_nsec))
+					return __syscall_ret(-ENOSYS);
+				return __syscall_ret(-EINVAL);
+			}
+			tmp[2*i+0] = times[i].tv_sec;
+			tmp[2*i+1] = times[i].tv_nsec / 1000;
+		}
+	}
+
+	r = __syscall(SYS_futimesat, fd, path, tv);
+	if (r != -ENOSYS || fd != AT_FDCWD) return __syscall_ret(r);
+	r = __syscall(SYS_utimes, path, tv);
+#endif
+	return __syscall_ret(r);
+}