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-rw-r--r--src/libbasic/mkdir.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/src/libbasic/mkdir.c b/src/libbasic/mkdir.c
new file mode 100644
index 0000000000..6b1a98402c
--- /dev/null
+++ b/src/libbasic/mkdir.c
@@ -0,0 +1,128 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <stdbool.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include "fs-util.h"
+#include "macro.h"
+#include "mkdir.h"
+#include "path-util.h"
+#include "stat-util.h"
+#include "user-util.h"
+
+int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, mkdir_func_t _mkdir) {
+ struct stat st;
+
+ if (_mkdir(path, mode) >= 0)
+ if (chmod_and_chown(path, mode, uid, gid) < 0)
+ return -errno;
+
+ if (lstat(path, &st) < 0)
+ return -errno;
+
+ if ((st.st_mode & 0007) > (mode & 0007) ||
+ (st.st_mode & 0070) > (mode & 0070) ||
+ (st.st_mode & 0700) > (mode & 0700) ||
+ (uid != UID_INVALID && st.st_uid != uid) ||
+ (gid != GID_INVALID && st.st_gid != gid) ||
+ !S_ISDIR(st.st_mode))
+ return -EEXIST;
+
+ return 0;
+}
+
+int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid) {
+ return mkdir_safe_internal(path, mode, uid, gid, mkdir);
+}
+
+int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
+ const char *p, *e;
+ int r;
+
+ assert(path);
+
+ if (prefix && !path_startswith(path, prefix))
+ return -ENOTDIR;
+
+ /* return immediately if directory exists */
+ e = strrchr(path, '/');
+ if (!e)
+ return -EINVAL;
+
+ if (e == path)
+ return 0;
+
+ p = strndupa(path, e - path);
+ r = is_dir(p, true);
+ if (r > 0)
+ return 0;
+ if (r == 0)
+ return -ENOTDIR;
+
+ /* create every parent directory in the path, except the last component */
+ p = path + strspn(path, "/");
+ for (;;) {
+ char t[strlen(path) + 1];
+
+ e = p + strcspn(p, "/");
+ p = e + strspn(e, "/");
+
+ /* Is this the last component? If so, then we're
+ * done */
+ if (*p == 0)
+ return 0;
+
+ memcpy(t, path, e - path);
+ t[e-path] = 0;
+
+ if (prefix && path_startswith(prefix, t))
+ continue;
+
+ r = _mkdir(t, mode);
+ if (r < 0 && errno != EEXIST)
+ return -errno;
+ }
+}
+
+int mkdir_parents(const char *path, mode_t mode) {
+ return mkdir_parents_internal(NULL, path, mode, mkdir);
+}
+
+int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
+ int r;
+
+ /* Like mkdir -p */
+
+ r = mkdir_parents_internal(prefix, path, mode, _mkdir);
+ if (r < 0)
+ return r;
+
+ r = _mkdir(path, mode);
+ if (r < 0 && (errno != EEXIST || is_dir(path, true) <= 0))
+ return -errno;
+
+ return 0;
+}
+
+int mkdir_p(const char *path, mode_t mode) {
+ return mkdir_p_internal(NULL, path, mode, mkdir);
+}