Imported Upstream version 4.1.5upstream/4.1.5

1 files changed, 133 insertions, 0 deletions

diff --git a/libmisc/remove_tree.c b/libmisc/remove_tree.c
new file mode 100644
index 0000000..1e527e3
--- /dev/null
+++ b/libmisc/remove_tree.c
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 1991 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2001, Marek Michałkiewicz
+ * Copyright (c) 2003 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2010, Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not 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
+ * HOLDERS 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.
+ */
+
+#include <config.h>
+
+#ident "$Id: remove_tree.c 3283 2010-09-05 15:34:42Z nekral-guest $"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <unistd.h>
+#include "prototypes.h"
+#include "defines.h"
+
+/*
+ * remove_tree - delete a directory tree
+ *
+ *	remove_tree() walks a directory tree and deletes all the files
+ *	and directories.
+ *	At the end, it deletes the root directory itself.
+ */
+
+int remove_tree (const char *root, bool remove_root)
+{
+	char *new_name = NULL;
+	int err = 0;
+	struct DIRECT *ent;
+	struct stat sb;
+	DIR *dir;
+
+	/*
+	 * Open the source directory and read each entry.  Every file
+	 * entry in the directory is copied with the UID and GID set
+	 * to the provided values.  As an added security feature only
+	 * regular files (and directories ...) are copied, and no file
+	 * is made set-ID.
+	 */
+	dir = opendir (root);
+	if (NULL == dir) {
+		return -1;
+	}
+
+	while ((ent = readdir (dir))) {
+		size_t new_len = strlen (root) + strlen (ent->d_name) + 2;
+
+		/*
+		 * Skip the "." and ".." entries
+		 */
+
+		if (strcmp (ent->d_name, ".") == 0 ||
+		    strcmp (ent->d_name, "..") == 0) {
+			continue;
+		}
+
+		/*
+		 * Make the filename for the current entry.
+		 */
+
+		free (new_name);
+		new_name = (char *) malloc (new_len);
+		if (NULL == new_name) {
+			err = -1;
+			break;
+		}
+		(void) snprintf (new_name, new_len, "%s/%s", root, ent->d_name);
+		if (LSTAT (new_name, &sb) == -1) {
+			continue;
+		}
+
+		if (S_ISDIR (sb.st_mode)) {
+			/*
+			 * Recursively delete this directory.
+			 */
+			if (remove_tree (new_name, true) != 0) {
+				err = -1;
+				break;
+			}
+		} else {
+			/*
+			 * Delete the file.
+			 */
+			if (unlink (new_name) != 0) {
+				err = -1;
+				break;
+			}
+		}
+	}
+	if (NULL != new_name) {
+		free (new_name);
+	}
+	(void) closedir (dir);
+
+	if (remove_root && (0 == err)) {
+		if (rmdir (root) != 0) {
+			err = -1;
+		}
+	}
+
+	return err;
+}
+