Properly record mtime after insert-file-contents on Android

* src/fileio.c (write_region): Do not verify file identity after
retreiving file status for the second time if st_ino is 0.

1 files changed, 9 insertions, 1 deletions

diff --git a/src/fileio.c b/src/fileio.c
index a92da93ae48..483498fd879 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -5628,7 +5628,15 @@ write_region (Lisp_Object start, Lisp_Object end, Lisp_Object filename,
          changed to a call to `stat'.  */
 
       if (emacs_fstatat (AT_FDCWD, fn, &st1, 0) == 0
-          && st.st_dev == st1.st_dev && st.st_ino == st1.st_ino)
+          && st.st_dev == st1.st_dev
+          && (st.st_ino == st1.st_ino
+#if defined HAVE_ANDROID && !defined ANDROID_STUBIFY
+              /* `st1.st_ino' == 0 indicates that the inode number
+                 cannot be extracted from this document file, despite
+                 `st' potentially being backed by a real file.  */
+              || st1.st_ino == 0
+#endif /* defined HAVE_ANDROID && !defined ANDROID_STUBIFY */
+              ))
         {
           /* Use the heuristic if it appears to be valid.  With neither
              O_EXCL nor O_TRUNC, if Emacs happened to write nothing to the