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authorJim Meyering <jim@meyering.net>2005-09-19 15:45:05 +0000
committerJim Meyering <jim@meyering.net>2005-09-19 15:45:05 +0000
commitee8931ea8eae960a9f3224627a16a5e5c3ad7a82 (patch)
treef4058db22ef0f59095f70f8eba70c1d65378fc8f
parenta1052bb3d9473a3d459c379daac3a923b2f9dc0f (diff)
downloadcoreutils-ee8931ea8eae960a9f3224627a16a5e5c3ad7a82.tar.xz
(unlinkat): New function.
-rw-r--r--lib/openat.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/lib/openat.c b/lib/openat.c
index 8908931b2..3e3251ba1 100644
--- a/lib/openat.c
+++ b/lib/openat.c
@@ -170,3 +170,43 @@ fstatat (int fd, char const *file, struct stat *st, int flag)
errno = saved_errno;
return err;
}
+
+/* Replacement for Solaris' function by the same name.
+ <http://www.google.com/search?q=unlinkat+site:docs.sun.com>
+ Simulate it by doing save_cwd/fchdir/(unlink|rmdir)/restore_cwd.
+ If either the save_cwd or the restore_cwd fails (relatively unlikely,
+ and usually indicative of a problem that deserves close attention),
+ then give a diagnostic and exit nonzero.
+ Otherwise, this function works just like Solaris' unlinkat. */
+int
+unlinkat (int fd, char const *file, int flag)
+{
+ struct saved_cwd saved_cwd;
+ int saved_errno;
+ int err;
+
+ if (fd == AT_FDCWD)
+ return (flag == AT_REMOVEDIR ? rmdir (file) : unlink (file));
+
+ if (save_cwd (&saved_cwd) != 0)
+ openat_save_fail (errno);
+
+ if (fchdir (fd) != 0)
+ {
+ saved_errno = errno;
+ free_cwd (&saved_cwd);
+ errno = saved_errno;
+ return -1;
+ }
+
+ err = (flag == AT_REMOVEDIR ? rmdir (file) : unlink (file));
+ saved_errno = errno;
+
+ if (restore_cwd (&saved_cwd) != 0)
+ openat_restore_fail (errno);
+
+ free_cwd (&saved_cwd);
+
+ errno = saved_errno;
+ return err;
+}