From: Jim Meyering <jim@meyering.net>
Date: Sun, 28 Nov 2004 20:50:26 +0000 (+0000)
Subject: *** empty log message ***
X-Git-Tag: v5.3.0~299
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=79e2f2c1f96756de494c3660cffab916517fe1d9;p=thirdparty%2Fcoreutils.git

*** empty log message ***
---

diff --git a/lib/openat.c b/lib/openat.c
new file mode 100644
index 0000000000..66da3c82af
--- /dev/null
+++ b/lib/openat.c
@@ -0,0 +1,75 @@
+/* provide a replacement openat function
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* written by Jim Meyering */
+
+#include <config.h>
+
+/* Disable the definition of openat to rpl_openat (from config.h) in this
+   file.  Otherwise, we'd get conflicting prototypes for rpl_openat on
+   most systems.  */
+#undef openat
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include "openat.h"
+
+#include "error.h"
+#include "save-cwd.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+// FIXME
+// int openat (int fildes, const char *path, int oflag, /* mode_t mode */...);
+
+/* Replacement for Solaris' openat function.
+   Simulate it by doing save_cwd/fchdir/open/restore_cwd.
+   If either the fchdir or the restore_cwd fails, then exit nonzero.  */
+int
+rpl_openat (int fd, char const *filename, int flags)
+{
+  struct saved_cwd saved_cwd;
+  int saved_errno = 0;
+  int new_fd;
+
+  if (fd == AT_FDCWD || *filename == '/')
+    return open (filename, flags);
+
+  if (save_cwd (&saved_cwd) != 0)
+    error (EXIT_FAILURE, errno,
+	   _("openat: unable to record current working directory"));
+  if (fchdir (fd) != 0)
+    {
+      free_cwd (&saved_cwd);
+      return -1;
+    }
+
+  new_fd = open (filename, flags);
+  if (new_fd < 0)
+    saved_errno = errno;
+
+  if (restore_cwd (&saved_cwd) != 0)
+    error (EXIT_FAILURE, errno,
+	   _("openat: unable to restore working directory"));
+  errno = saved_errno;
+
+  return new_fd;
+}