c.lib 1.177 (29.9.2004)

- Moved the locale initialization/cleanup code into constructors
  and destructors.

- The socket cleanup function is now a destructor.

- The math cleanup function is now a destructor.

- The wildcard cleanup function is now a destructor.

- The stdio cleanup function is now a destructor.

- The stack extension cleanup function is now a destructor.

- The code that cleans up after the program's current directory
  was changed is now a destructor function.

- Moved the initialization/cleanup code for unlink() into constructors
  and destructors.

- Moved the initialization/cleanup code for usergroup.library into
  constructors and destructors.

- Added usleep(), and created wrapper code that both sleep() and
  usleep() can use.

- Added strtoll() and strtoull(), with further changes to <limits.h>
  and <stdlib.h>.


git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14737 87f5fb63-7c3d-0410-a384-fd976d0f7a62

library/unistd_chdir_exit.c

@@ -0,0 +1,74 @@
+/*
+ * $Id: unistd_chdir_exit.c,v 1.1 2004-09-29 14:17:44 obarthel Exp $
+ *
+ * :ts=4
+ *
+ * Portable ISO 'C' (1994) runtime library for the Amiga computer
+ * Copyright (c) 2002-2004 by Olaf Barthel <olsen@sourcery.han.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Neither the name of Olaf Barthel nor the names of contributors
+ *     may be used to endorse or promote products derived from this
+ *     software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _UNISTD_HEADERS_H
+#include "unistd_headers.h"
+#endif /* _UNISTD_HEADERS_H */
+
+/****************************************************************************/
+
+/* The following is not part of the ISO 'C' (1994) standard. */
+
+/****************************************************************************/
+
+/* If the program's current directory was changed, here is where
+   we find out about it. */
+BPTR __original_current_directory;
+BOOL __current_directory_changed;
+BOOL __unlock_current_directory;
+
+/****************************************************************************/
+
+CLIB_DESTRUCTOR(__chdir_exit)
+{
+	ENTER();
+
+	if(__current_directory_changed)
+	{
+		BPTR old_dir;
+
+		old_dir = CurrentDir(__original_current_directory);
+		__original_current_directory = ZERO;
+
+		if(__unlock_current_directory)
+		{
+			UnLock(old_dir);
+
+			__unlock_current_directory = FALSE;
+		}
+
+		__current_directory_changed = FALSE;
+	}
+
+	LEAVE();
+}