install: When preserving timestamps, also copy the nanoseconds part.

Now that we have utimensat in -legacy, install(1) can use it.

This is a revert of r299942 which is itself a revert of r299850.

usr.bin/xinstall/tests/install_test.sh

@@ -64,6 +64,12 @@ copy_to_nonexistent_backup_safe_body() {
 	copy_to_nonexistent_with_opts -b -B.bak -S
 }
 
+atf_test_case copy_to_nonexistent_preserving
+copy_to_nonexistent_preserving_body() {
+	copy_to_nonexistent_with_opts -p
+	[ ! testf -ot copyf ] || atf_fail "bad timestamp 2"
+}
+
 copy_self_with_opts() {
 	printf 'test\n123\r456\r\n789\0z' >testf
 	printf 'test\n123\r456\r\n789\0z' >testf2
@@ -307,6 +313,7 @@ atf_init_test_cases() {
 	atf_add_test_case copy_to_nonexistent_safe_comparing
 	atf_add_test_case copy_to_nonexistent_backup
 	atf_add_test_case copy_to_nonexistent_backup_safe
+	atf_add_test_case copy_to_nonexistent_preserving
 	atf_add_test_case copy_self
 	atf_add_test_case copy_self_safe
 	atf_add_test_case copy_self_comparing

usr.bin/xinstall/xinstall.c

@@ -131,7 +131,7 @@ static void	do_symlink(const char *, const char *, const struct stat *);
 static void	makelink(const char *, const char *, const struct stat *);
 static void	install(const char *, const char *, u_long, u_int);
 static void	install_dir(char *);
-static void	metadata_log(const char *, const char *, struct timeval *,
+static void	metadata_log(const char *, const char *, struct timespec *,
 		    const char *, const char *, off_t);
 static int	parseid(const char *, id_t *);
 static void	strip(const char *);
@@ -722,7 +722,7 @@ static void
 install(const char *from_name, const char *to_name, u_long fset, u_int flags)
 {
 	struct stat from_sb, temp_sb, to_sb;
-	struct timeval tvb[2];
+	struct timespec tsb[2];
 	int devnull, files_match, from_fd, serrno, target;
 	int tempcopy, temp_fd, to_fd;
 	char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
@@ -857,11 +857,9 @@ install(const char *from_name, const char *to_name, u_long fset, u_int flags)
 			 * Need to preserve target file times, though.
 			 */
 			if (to_sb.st_nlink != 1) {
-				tvb[0].tv_sec = to_sb.st_atime;
+				tsb[0] = to_sb.st_atim;
-				tvb[0].tv_usec = 0;
+				tsb[1] = to_sb.st_mtim;
-				tvb[1].tv_sec = to_sb.st_mtime;
+				(void)utimensat(AT_FDCWD, tempfile, tsb, 0);
-				tvb[1].tv_usec = 0;
-				(void)utimes(tempfile, tvb);
 			} else {
 				files_match = 1;
 				(void)unlink(tempfile);
@@ -916,11 +914,9 @@ install(const char *from_name, const char *to_name, u_long fset, u_int flags)
 	 * Preserve the timestamp of the source file if necessary.
 	 */
 	if (dopreserve && !files_match && !devnull) {
-		tvb[0].tv_sec = from_sb.st_atime;
+		tsb[0] = from_sb.st_atim;
-		tvb[0].tv_usec = 0;
+		tsb[1] = from_sb.st_mtim;
-		tvb[1].tv_sec = from_sb.st_mtime;
+		(void)utimensat(AT_FDCWD, to_name, tsb, 0);
-		tvb[1].tv_usec = 0;
-		(void)utimes(to_name, tvb);
 	}
 
 	if (fstat(to_fd, &to_sb) == -1) {
@@ -989,7 +985,7 @@ install(const char *from_name, const char *to_name, u_long fset, u_int flags)
 	if (!devnull)
 		(void)close(from_fd);
 
-	metadata_log(to_name, "file", tvb, NULL, digestresult, to_sb.st_size);
+	metadata_log(to_name, "file", tsb, NULL, digestresult, to_sb.st_size);
 	free(digestresult);
 }
 
@@ -1301,7 +1297,7 @@ install_dir(char *path)
  *	or to allow integrity checks to be performed.
  */
 static void
-metadata_log(const char *path, const char *type, struct timeval *tv,
+metadata_log(const char *path, const char *type, struct timespec *ts,
 	const char *slink, const char *digestresult, off_t size)
 {
 	static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' };
@@ -1355,9 +1351,9 @@ metadata_log(const char *path, const char *type, struct timeval *tv,
 	}
 	if (*type == 'f') /* type=file */
 		fprintf(metafp, " size=%lld", (long long)size);
-	if (tv != NULL && dopreserve)
+	if (ts != NULL && dopreserve)
-		fprintf(metafp, " time=%lld.%ld",
+		fprintf(metafp, " time=%lld.%09ld",
-			(long long)tv[1].tv_sec, (long)tv[1].tv_usec);
+			(long long)ts[1].tv_sec, ts[1].tv_nsec);
 	if (digestresult && digest)
 		fprintf(metafp, " %s=%s", digest, digestresult);
 	if (fflags)