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-rw-r--r--lib/remove_tree.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/lib/remove_tree.c b/lib/remove_tree.c
new file mode 100644
index 0000000..3d76b95
--- /dev/null
+++ b/lib/remove_tree.c
@@ -0,0 +1,101 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2001, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <fcntl.h>
+#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"
+
+static int remove_tree_at (int at_fd, const char *path, bool remove_root)
+{
+ DIR *dir;
+ const struct dirent *ent;
+ int dir_fd, rc = 0;
+
+ dir_fd = openat (at_fd, path, O_RDONLY | O_DIRECTORY | O_NOFOLLOW | O_CLOEXEC);
+ if (dir_fd < 0) {
+ return -1;
+ }
+
+ dir = fdopendir (dir_fd);
+ if (!dir) {
+ (void) close (dir_fd);
+ return -1;
+ }
+
+ /*
+ * Open the source directory and delete each entry.
+ */
+ while ((ent = readdir (dir))) {
+ struct stat ent_sb;
+
+ /*
+ * Skip the "." and ".." entries
+ */
+ if (strcmp (ent->d_name, ".") == 0 ||
+ strcmp (ent->d_name, "..") == 0) {
+ continue;
+ }
+
+ rc = fstatat (dirfd(dir), ent->d_name, &ent_sb, AT_SYMLINK_NOFOLLOW);
+ if (rc < 0) {
+ break;
+ }
+
+ if (S_ISDIR (ent_sb.st_mode)) {
+ /*
+ * Recursively delete this directory.
+ */
+ if (remove_tree_at (dirfd(dir), ent->d_name, true) != 0) {
+ rc = -1;
+ break;
+ }
+ } else {
+ /*
+ * Delete the file.
+ */
+ if (unlinkat (dirfd(dir), ent->d_name, 0) != 0) {
+ rc = -1;
+ break;
+ }
+ }
+ }
+
+ (void) closedir (dir);
+
+ if (remove_root && (0 == rc)) {
+ if (unlinkat (at_fd, path, AT_REMOVEDIR) != 0) {
+ rc = -1;
+ }
+ }
+
+ return rc;
+}
+
+/*
+ * 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)
+{
+ return remove_tree_at (AT_FDCWD, root, remove_root);
+}