Add utimensat and unlinkat syscalls. Corresponds to llvm-project-delu…

…ge/56b27ba17c6c

src/stat/utimensat.c

@@ -4,57 +4,7 @@
 #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);
+	return zsys_utimensat(fd, path, times, flags);
 }

src/unistd/unlinkat.c

@@ -3,5 +3,5 @@
 
 int unlinkat(int fd, const char *path, int flag)
 {
-	return syscall(SYS_unlinkat, fd, path, flag);
+	return zsys_unlinkat(fd, path, flag);
 }