129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <string.h>
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#include <errno.h>
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#include "fs-util.h"
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#include "mkdir.h"
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#include "path-util.h"
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#include "stat-util.h"
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#include "user-util.h"
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#include "util.h"
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int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, mkdir_func_t _mkdir) {
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struct stat st;
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if (_mkdir(path, mode) >= 0)
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if (chmod_and_chown(path, mode, uid, gid) < 0)
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return -errno;
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if (lstat(path, &st) < 0)
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return -errno;
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if ((st.st_mode & 0007) > (mode & 0007) ||
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(st.st_mode & 0070) > (mode & 0070) ||
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(st.st_mode & 0700) > (mode & 0700) ||
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(uid != UID_INVALID && st.st_uid != uid) ||
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(gid != GID_INVALID && st.st_gid != gid) ||
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!S_ISDIR(st.st_mode))
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return -EEXIST;
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return 0;
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}
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int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid) {
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return mkdir_safe_internal(path, mode, uid, gid, mkdir);
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}
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int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
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const char *p, *e;
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int r;
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assert(path);
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if (prefix && !path_startswith(path, prefix))
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return -ENOTDIR;
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/* return immediately if directory exists */
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e = strrchr(path, '/');
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if (!e)
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return -EINVAL;
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if (e == path)
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return 0;
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p = strndupa(path, e - path);
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r = is_dir(p, true);
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if (r > 0)
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return 0;
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if (r == 0)
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return -ENOTDIR;
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/* create every parent directory in the path, except the last component */
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p = path + strspn(path, "/");
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for (;;) {
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char t[strlen(path) + 1];
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e = p + strcspn(p, "/");
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p = e + strspn(e, "/");
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/* Is this the last component? If so, then we're
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* done */
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if (*p == 0)
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return 0;
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memcpy(t, path, e - path);
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t[e-path] = 0;
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if (prefix && path_startswith(prefix, t))
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continue;
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r = _mkdir(t, mode);
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if (r < 0 && errno != EEXIST)
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return -errno;
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}
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}
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int mkdir_parents(const char *path, mode_t mode) {
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return mkdir_parents_internal(NULL, path, mode, mkdir);
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}
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int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
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int r;
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/* Like mkdir -p */
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r = mkdir_parents_internal(prefix, path, mode, _mkdir);
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if (r < 0)
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return r;
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r = _mkdir(path, mode);
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if (r < 0 && (errno != EEXIST || is_dir(path, true) <= 0))
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return -errno;
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return 0;
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}
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int mkdir_p(const char *path, mode_t mode) {
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return mkdir_p_internal(NULL, path, mode, mkdir);
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}
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