win32: add utime()

1 files changed, 29 insertions, 0 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index e4ff14357..0fcaeb313 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -290,6 +290,35 @@ int mingw_fstat(int fd, struct stat *buf)
         return -1;
 }
 
+static inline void time_t_to_filetime(time_t t, FILETIME *ft)
+{
+        long long winTime = t * 10000000LL + 116444736000000000LL;
+        ft->dwLowDateTime = winTime;
+        ft->dwHighDateTime = winTime >> 32;
+}
+
+int mingw_utime (const char *file_name, const struct utimbuf *times)
+{
+        FILETIME mft, aft;
+        int fh, rc;
+
+        /* must have write permission */
+        if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
+                return -1;
+
+        if (times) {
+                time_t_to_filetime(times->modtime, &mft);
+                time_t_to_filetime(times->actime, &aft);
+        }
+        if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
+                errno = EINVAL;
+                rc = -1;
+        } else
+                rc = 0;
+        close(fh);
+        return rc;
+}
+
 unsigned int sleep (unsigned int seconds)
 {
         Sleep(seconds*1000);