Switch to utimensat for newer POSIX versions

Some libcs like uClibc-ng can optionally disable deprecated functions.
utime is one of them. When done so, both the header and the function go
missing.

This fixes flac_utime to work in such a situation.

include/share/compat.h

@@ -112,9 +112,13 @@
 #include <sys/utime.h> /* for utime() */
 #endif
 #else
+#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L)
+#include <fcntl.h>
+#else
 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
 #include <utime.h> /* for utime() */
 #endif
+#endif
 
 #if defined _MSC_VER
 #  if _MSC_VER >= 1800
@@ -160,11 +164,15 @@
 
 #define flac_fopen fopen
 #define flac_chmod chmod
-#define flac_utime utime
 #define flac_unlink unlink
 #define flac_rename rename
 #define flac_stat stat
 
+#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L)
+#define flac_utime(a, b) utimensat (AT_FDCWD, a, *b, 0)
+#else
+#define flac_utime utime
+#endif
 #endif
 
 #ifdef _WIN32

src/libFLAC/metadata_iterators.c

@@ -3422,13 +3422,18 @@ FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats)
 
 void set_file_stats_(const char *filename, struct flac_stat_s *stats)
 {
-	struct utimbuf srctime;
-
 	FLAC__ASSERT(0 != filename);
 	FLAC__ASSERT(0 != stats);
 
+#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L)
+	struct timespec srctime[2] = {};
+	srctime[0].tv_sec = stats->st_atime;
+	srctime[1].tv_sec = stats->st_mtime;
+#else
+	struct utimbuf srctime;
 	srctime.actime = stats->st_atime;
 	srctime.modtime = stats->st_mtime;
+#endif
 	(void)flac_chmod(filename, stats->st_mode);
 	(void)flac_utime(filename, &srctime);
 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__

src/share/grabbag/file.c

@@ -27,7 +27,6 @@
 #include <fcntl.h> /* for _O_BINARY */
 #else
 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
-#include <utime.h> /* for utime() */
 #endif
 #if defined __EMX__
 #include <io.h> /* for setmode(), O_BINARY */
@@ -53,11 +52,17 @@
 void grabbag__file_copy_metadata(const char *srcpath, const char *destpath)
 {
 	struct flac_stat_s srcstat;
-	struct utimbuf srctime;
 
 	if(0 == flac_stat(srcpath, &srcstat)) {
+#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L)
+		struct timespec srctime[2] = {};
+		srctime[0].tv_sec = srcstat.st_atime;
+		srctime[1].tv_sec = srcstat.st_mtime;
+#else
+		struct utimbuf srctime;
 		srctime.actime = srcstat.st_atime;
 		srctime.modtime = srcstat.st_mtime;
+#endif
 		(void)flac_chmod(destpath, srcstat.st_mode);
 		(void)flac_utime(destpath, &srctime);
 	}

src/test_libFLAC++/metadata_manip.cpp

@@ -27,8 +27,6 @@
 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
 #ifdef _MSC_VER
 #include <sys/utime.h>
-#else
-#include <utime.h> /* for utime() */
 #endif
 #if !defined _MSC_VER && !defined __MINGW32__ && !defined __EMX__
 #include <unistd.h> /* for chown(), unlink() */
@@ -271,13 +269,18 @@ bool get_file_stats_(const char *filename, struct flac_stat_s *stats)
 
 void set_file_stats_(const char *filename, struct flac_stat_s *stats)
 {
-	struct utimbuf srctime;
-
 	FLAC__ASSERT(0 != filename);
 	FLAC__ASSERT(0 != stats);
 
+#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L)
+	struct timespec srctime[2] = {};
+	srctime[0].tv_sec = stats->st_atime;
+	srctime[1].tv_sec = stats->st_mtime;
+#else
+	struct utimbuf srctime;
 	srctime.actime = stats->st_atime;
 	srctime.modtime = stats->st_mtime;
+#endif
 	(void)flac_chmod(filename, stats->st_mode);
 	(void)flac_utime(filename, &srctime);
 #if !defined _MSC_VER && !defined __MINGW32__ && !defined __EMX__

src/test_libFLAC/metadata_manip.c

@@ -29,7 +29,6 @@
 #include <io.h> /* for chmod() */
 #else
 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
-#include <utime.h> /* for utime() */
 #include <unistd.h> /* for chown(), unlink() */
 #endif
 #include <sys/stat.h> /* for stat(), maybe chmod() */
@@ -256,13 +255,18 @@ static FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stat
 
 static void set_file_stats_(const char *filename, struct flac_stat_s *stats)
 {
-	struct utimbuf srctime;
-
 	FLAC__ASSERT(0 != filename);
 	FLAC__ASSERT(0 != stats);
 
+#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L)
+	struct timespec srctime[2] = {};
+	srctime[0].tv_sec = stats->st_atime;
+	srctime[1].tv_sec = stats->st_mtime;
+#else
+	struct utimbuf srctime;
 	srctime.actime = stats->st_atime;
 	srctime.modtime = stats->st_mtime;
+#endif
 	(void)flac_chmod(filename, stats->st_mode);
 	(void)flac_utime(filename, &srctime);
 #if !defined _MSC_VER && !defined __MINGW32__