/*-*- 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); }