Add ‘nofollow’ flag to set-file-times

This is a companion to the recent set-file-modes patch.
It adds support for a ‘nofollow’ flag to set-file-times (Bug#39773).
Like the set-file-modes patch, it needs work in the w32 port.
* admin/merge-gnulib (GNULIB_MODULES): Add futimens, utimensat.
Remove utimens.
* doc/lispref/files.texi (Changing Files):
* etc/NEWS: Mention the change.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
* lisp/files.el (copy-directory):
* lisp/gnus/gnus-cloud.el (gnus-cloud-replace-file):
* lisp/net/tramp-adb.el (tramp-adb-handle-copy-file):
* lisp/net/tramp-smb.el (tramp-smb-handle-copy-file):
* lisp/tar-mode.el (tar-copy):
* test/lisp/filenotify-tests.el (file-notify-test03-events):
* test/lisp/files-tests.el:
(files-tests-file-name-non-special-set-file-times):
* test/lisp/net/tramp-tests.el (tramp-test22-file-times):
When setting file times, avoid following symbolic links
when the file is not supposed to be a symbolic link.
* lib/futimens.c, lib/utimensat.c, m4/futimens.m4, m4/utimensat.m4:
New files, copied from Gnulib.
* lisp/gnus/gnus-cloud.el (gnus-cloud-replace-file):
When creating a file that is not supposed to exist already,
use the excl flag to check this.
* lisp/net/tramp-adb.el (tramp-adb-handle-set-file-times):
* lisp/net/tramp-sh.el (tramp-sh-handle-set-file-times):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-handle-set-file-times):
Accept an optional FLAG arg that is currently ignored,
and add a FIXME comment for it.
* lisp/net/tramp-gvfs.el (tramp-gvfs-handle-set-file-times):
* src/fileio.c (Fset_file_times):
Support an optional FLAG arg.
* src/fileio.c (Fcopy_file): Use futimens instead of set_file_times,
as it’s simpler and is a POSIX API.
* src/sysdep.c (set_file_times): Move from here ...
* src/w32.c (set_file_times): ... to here, and make it static,
since it is now used only in w32.c.  Presumably w32.c should also
add support for futimens and utimensat (the POSIX APIs, which
Emacs now uses) and it can remove fdutimens (the Gnulib API,
which Emacs no longer uses).

1 files changed, 0 insertions, 15 deletions

diff --git a/src/sysdep.c b/src/sysdep.c
index e8e8bbfb502..149d80f19ec 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -2752,21 +2752,6 @@ emacs_perror (char const *message)
   errno = err;
 }
 
-/* Set the access and modification time stamps of FD (a.k.a. FILE) to be
-   ATIME and MTIME, respectively.
-   FD must be either negative -- in which case it is ignored --
-   or a file descriptor that is open on FILE.
-   If FD is nonnegative, then FILE can be NULL.  */
-int
-set_file_times (int fd, const char *filename,
-		struct timespec atime, struct timespec mtime)
-{
-  struct timespec timespec[2];
-  timespec[0] = atime;
-  timespec[1] = mtime;
-  return fdutimens (fd, filename, timespec);
-}
-
 /* Rename directory SRCFD's entry SRC to directory DSTFD's entry DST.
    This is like renameat except that it fails if DST already exists,
    or if this operation is not supported atomically.  Return 0 if