Add check for statbuf.st_mtim if available and use statbuf.st_mtim to get nanosecond precision in modification date, also fix conversion of nanoseconds in creation date.

ChangeLog

@@ -1,3 +1,13 @@
+2021-02-02 Riccardo Mottola <rm@gnu.org>
+
+	* configure
+	* configure.ac
+	Add check for statbuf.st_mtim if available
+
+	* Source/NSFileManager.m
+	Use statbuf.st_mtim to get nanosecond precision in modification
+	date, also fix conversion of nanoseconds in creation date.
+
 2021-01-21 Fred Kiefer <fredkiefer@gmx.de>
 
 	* Tools/pl2link.m (main): Set key StartupWMClass and allow file

Headers/GNUstepBase/config.h.in

@@ -592,6 +592,9 @@
 /* Define to 1 if `st_birthtimespec' is a member of `struct stat'. */
 #undef HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC
 
+/* Define to 1 if `st_mtim' is a member of `struct stat'. */
+#undef HAVE_STRUCT_STAT_ST_MTIM
+
 /* Define to 1 if you have the `symlink' function. */
 #undef HAVE_SYMLINK
 

Source/NSFileManager.m

@@ -611,8 +611,8 @@ static NSStringEncoding	defaultEncoding;
           struct timespec ub[2];
 	  ub[0].tv_sec = 0;
 	  ub[0].tv_nsec = UTIME_OMIT; // we don't touch access time
-	  ub[1].tv_sec = truncl(ti);
+	  ub[1].tv_sec = (time_t)trunc(ti);
-	  ub[1].tv_nsec = (ti - (double)ub[1].tv_sec) * 1.0e6;
+	  ub[1].tv_nsec = (long)trunc((ti - trunc(ti)) * 1.0e9);
 
 	  ok = (utimensat(AT_FDCWD, lpath, ub, 0) == 0);
 #elif  defined(_POSIX_VERSION)
@@ -661,8 +661,8 @@ static NSStringEncoding	defaultEncoding;
           struct timespec ub[2];
 	  ub[0].tv_sec = 0;
 	  ub[0].tv_nsec = UTIME_OMIT; // we don't touch access time
-	  ub[1].tv_sec = truncl(ti);
+	  ub[1].tv_sec = (time_t)trunc(ti);
-	  ub[1].tv_nsec = (ti - (double)ub[1].tv_sec) * 1.0e6;
+	  ub[1].tv_nsec = (long)trunc((ti - trunc(ti)) * 1.0e9);
 
 	  ok = (utimensat(AT_FDCWD, lpath, ub, 0) == 0);
 #elif  defined(_WIN32) || defined(_POSIX_VERSION)
@@ -3874,7 +3874,15 @@ static NSSet	*fileKeys = nil;
 
 - (NSDate*) fileModificationDate
 {
-  return [NSDate dateWithTimeIntervalSince1970: statbuf.st_mtime];
+  NSTimeInterval ti;
+
+#if defined (HAVE_STRUCT_STAT_ST_MTIM)
+  ti = statbuf.st_mtim.tv_sec + (double)statbuf.st_mtim.tv_nsec / 1.0e9;
+#else
+  ti = (double)statbuf.st_mtime;
+#endif
+
+  return [NSDate dateWithTimeIntervalSince1970: ti];
 }
 
 - (NSUInteger) filePosixPermissions

configure

@@ -9492,7 +9492,17 @@ fi
 fi
 
 
-# Look for file creation date on NetBSD, FreeBSD, Darwin
+# Look for file creation and modification date on NetBSD, FreeBSD, Darwin
+ac_fn_c_check_member "$LINENO" "struct stat" "st_mtim" "ac_cv_member_struct_stat_st_mtim" "#include <sys/stat.h>
+"
+if test "x$ac_cv_member_struct_stat_st_mtim" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_STAT_ST_MTIM 1
+_ACEOF
+
+
+fi
 ac_fn_c_check_member "$LINENO" "struct stat" "st_birthtime" "ac_cv_member_struct_stat_st_birthtime" "#include <sys/stat.h>
 "
 if test "x$ac_cv_member_struct_stat_st_birthtime" = xyes; then :

configure.ac

@@ -2399,8 +2399,8 @@ fi
 AC_CHECK_FUNCS(getcwd)
 AC_HEADER_DIRENT
 
-# Look for file creation date on NetBSD, FreeBSD, Darwin
+# Look for file creation and modification date on NetBSD, FreeBSD, Darwin
-AC_CHECK_MEMBERS([struct stat.st_birthtime, struct stat.st_birthtimespec, struct stat.st_birthtim, struct stat64.st_birthtimespec],
+AC_CHECK_MEMBERS([struct stat.st_mtim, struct stat.st_birthtime, struct stat.st_birthtimespec, struct stat.st_birthtim, struct stat64.st_birthtimespec],
 		 ,,[#include <sys/stat.h>])
 
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