Revert "Don’t assume openat"

This reverts commit 3cccf0a9107d585173e527550bbc45253624ca2e.

This is a change with far-reaching effects on MS-Windows at the least,
where file-related APIs are shadowed to support transparent support
for UTF-8 encoded file names.  Making such changes on a stable branch
for the benefit of a proprietary platform with a 13-year old OS is a
tail wagging the dog.  Please don't do that without discussing first.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c
index 217a38bc07f..57a5eff3bf6 100644
--- a/lib-src/emacsclient.c
+++ b/lib-src/emacsclient.c
@@ -1412,7 +1412,8 @@ local_sockname (int s, char sockname[socknamesize], int tmpdirlen,
   char *emacsdirend = sockname + tmpdirlen + suffixlen -
     strlen(server_name) - 1;
   *emacsdirend = '\0';
-  int dir = open (sockname, O_PATH | O_DIRECTORY | O_NOFOLLOW | O_CLOEXEC);
+  int dir = openat (AT_FDCWD, sockname,
+                    O_PATH | O_DIRECTORY | O_NOFOLLOW | O_CLOEXEC);
   *emacsdirend = '/';
   if (dir < 0)
     return errno;