diff options
Diffstat (limited to 'src/libbasic/src/mkdir.c')
-rw-r--r-- | src/libbasic/src/mkdir.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/libbasic/src/mkdir.c b/src/libbasic/src/mkdir.c new file mode 100644 index 0000000000..6b1a98402c --- /dev/null +++ b/src/libbasic/src/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); +} |