1 files changed, 147 insertions, 0 deletions
diff --git a/src/shared/mkdir.c b/src/shared/mkdir.c
new file mode 100644
index 0000000000..0e51b64f69
--- /dev/null
+++ b/src/shared/mkdir.c
@@ -0,0 +1,147 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  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 <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "mkdir.h"
+#include "label.h"
+#include "util.h"
+
+int mkdir_label(const char *path, mode_t mode) {
+        return label_mkdir(path, mode, true);
+}
+
+static int makedir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid, bool apply) {
+        struct stat st;
+
+        if (label_mkdir(path, mode, apply) >= 0)
+                if (chmod_and_chown(path, mode, uid, gid) < 0)
+                        return -errno;
+
+        if (lstat(path, &st) < 0)
+                return -errno;
+
+        if ((st.st_mode & 0777) != mode ||
+            st.st_uid != uid ||
+            st.st_gid != gid ||
+            !S_ISDIR(st.st_mode)) {
+                errno = EEXIST;
+                return -errno;
+        }
+
+        return 0;
+}
+
+int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid) {
+        return makedir_safe(path, mode, uid, gid, false);
+}
+
+int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid) {
+        return makedir_safe(path, mode, uid, gid, true);
+}
+
+static int makedir_parents(const char *path, mode_t mode, bool apply) {
+        struct stat st;
+        const char *p, *e;
+
+        assert(path);
+
+        /* return immediately if directory exists */
+        e = strrchr(path, '/');
+        if (!e)
+                return -EINVAL;
+        p = strndupa(path, e - path);
+        if (stat(p, &st) >= 0) {
+                if ((st.st_mode & S_IFMT) == S_IFDIR)
+                        return 0;
+                else
+                        return -ENOTDIR;
+        }
+
+        /* create every parent directory in the path, except the last component */
+        p = path + strspn(path, "/");
+        for (;;) {
+                int r;
+                char *t;
+
+                e = p + strcspn(p, "/");
+                p = e + strspn(e, "/");
+
+                /* Is this the last component? If so, then we're
+                 * done */
+                if (*p == 0)
+                        return 0;
+
+                t = strndup(path, e - path);
+                if (!t)
+                        return -ENOMEM;
+
+                r = label_mkdir(t, mode, apply);
+                free(t);
+
+                if (r < 0 && errno != EEXIST)
+                        return -errno;
+        }
+}
+
+int mkdir_parents(const char *path, mode_t mode) {
+        return makedir_parents(path, mode, false);
+}
+
+int mkdir_parents_label(const char *path, mode_t mode) {
+        return makedir_parents(path, mode, true);
+}
+
+static int is_dir(const char* path) {
+        struct stat st;
+        if (stat(path, &st) < 0)
+                return -errno;
+        return S_ISDIR(st.st_mode);
+}
+
+static int makedir_p(const char *path, mode_t mode, bool apply) {
+        int r;
+
+        /* Like mkdir -p */
+
+        r = makedir_parents(path, mode, apply);
+        if (r < 0)
+                return r;
+
+        r = label_mkdir(path, mode, apply);
+        if (r < 0 && (errno != EEXIST || is_dir(path) <= 0))
+                return -errno;
+
+        return 0;
+}
+
+int mkdir_p(const char *path, mode_t mode) {
+        return makedir_p(path, mode, false);
+}
+
+int mkdir_p_label(const char *path, mode_t mode) {
+        return makedir_p(path, mode, true);
+}