Line data    Source code

       1             : /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
       2             : 
       3             : /***
       4             :   This file is part of systemd.
       5             : 
       6             :   Copyright 2010 Lennart Poettering
       7             : 
       8             :   systemd is free software; you can redistribute it and/or modify it
       9             :   under the terms of the GNU Lesser General Public License as published by
      10             :   the Free Software Foundation; either version 2.1 of the License, or
      11             :   (at your option) any later version.
      12             : 
      13             :   systemd is distributed in the hope that it will be useful, but
      14             :   WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
      16             :   Lesser General Public License for more details.
      17             : 
      18             :   You should have received a copy of the GNU Lesser General Public License
      19             :   along with systemd; If not, see <http://www.gnu.org/licenses/>.
      20             : ***/
      21             : 
      22             : #include <string.h>
      23             : #include <errno.h>
      24             : 
      25             : #include "util.h"
      26             : #include "path-util.h"
      27             : #include "mkdir.h"
      28             : 
      29           1 : int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, mkdir_func_t _mkdir) {
      30             :         struct stat st;
      31             : 
      32           1 :         if (_mkdir(path, mode) >= 0)
      33           1 :                 if (chmod_and_chown(path, mode, uid, gid) < 0)
      34           0 :                         return -errno;
      35             : 
      36           1 :         if (lstat(path, &st) < 0)
      37           0 :                 return -errno;
      38             : 
      39           2 :         if ((st.st_mode & 0007) > (mode & 0007) ||
      40           2 :             (st.st_mode & 0070) > (mode & 0070) ||
      41           2 :             (st.st_mode & 0700) > (mode & 0700) ||
      42           1 :             (uid != UID_INVALID && st.st_uid != uid) ||
      43           2 :             (gid != GID_INVALID && st.st_gid != gid) ||
      44           1 :             !S_ISDIR(st.st_mode))
      45           0 :                 return -EEXIST;
      46             : 
      47           1 :         return 0;
      48             : }
      49             : 
      50           1 : int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid) {
      51           1 :         return mkdir_safe_internal(path, mode, uid, gid, mkdir);
      52             : }
      53             : 
      54          89 : int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
      55             :         const char *p, *e;
      56             :         int r;
      57             : 
      58          89 :         assert(path);
      59             : 
      60          89 :         if (prefix && !path_startswith(path, prefix))
      61           0 :                 return -ENOTDIR;
      62             : 
      63             :         /* return immediately if directory exists */
      64          89 :         e = strrchr(path, '/');
      65          89 :         if (!e)
      66           0 :                 return -EINVAL;
      67             : 
      68          89 :         if (e == path)
      69           1 :                 return 0;
      70             : 
      71          88 :         p = strndupa(path, e - path);
      72          88 :         r = is_dir(p, true);
      73          88 :         if (r > 0)
      74          63 :                 return 0;
      75          25 :         if (r == 0)
      76           0 :                 return -ENOTDIR;
      77             : 
      78             :         /* create every parent directory in the path, except the last component */
      79          25 :         p = path + strspn(path, "/");
      80         118 :         for (;;) {
      81         118 :                 char t[strlen(path) + 1];
      82             : 
      83         118 :                 e = p + strcspn(p, "/");
      84         118 :                 p = e + strspn(e, "/");
      85             : 
      86             :                 /* Is this the last component? If so, then we're
      87             :                  * done */
      88         118 :                 if (*p == 0)
      89          25 :                         return 0;
      90             : 
      91          93 :                 memcpy(t, path, e - path);
      92          93 :                 t[e-path] = 0;
      93             : 
      94          93 :                 if (prefix && path_startswith(prefix, t))
      95           0 :                         continue;
      96             : 
      97          93 :                 r = _mkdir(t, mode);
      98          93 :                 if (r < 0 && errno != EEXIST)
      99           0 :                         return -errno;
     100          93 :         }
     101             : }
     102             : 
     103          24 : int mkdir_parents(const char *path, mode_t mode) {
     104          24 :         return mkdir_parents_internal(NULL, path, mode, mkdir);
     105             : }
     106             : 
     107          13 : int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
     108             :         int r;
     109             : 
     110             :         /* Like mkdir -p */
     111             : 
     112          13 :         r = mkdir_parents_internal(prefix, path, mode, _mkdir);
     113          13 :         if (r < 0)
     114           0 :                 return r;
     115             : 
     116          13 :         r = _mkdir(path, mode);
     117          13 :         if (r < 0 && (errno != EEXIST || is_dir(path, true) <= 0))
     118           0 :                 return -errno;
     119             : 
     120          13 :         return 0;
     121             : }
     122             : 
     123           2 : int mkdir_p(const char *path, mode_t mode) {
     124           2 :         return mkdir_p_internal(NULL, path, mode, mkdir);
     125             : }