Systemd/src/basic/mkdir.h
Zbigniew Jędrzejewski-Szmek 37c1d5e97d tree-wide: warn when a directory path already exists but has bad mode/owner/type
When we are attempting to create directory somewhere in the bowels of /var/lib
and get an error that it already exists, it can be quite hard to diagnose what
is wrong (especially for a user who is not aware that the directory must have
the specified owner, and permissions not looser than what was requested). Let's
print a warning in most cases. A warning is appropriate, because such state is
usually a sign of borked installation and needs to be resolved by the adminstrator.

$ build/test-fs-util

Path "/tmp/test-readlink_and_make_absolute" already exists and is not a directory, refusing.
   (or)
Directory "/tmp/test-readlink_and_make_absolute" already exists, but has mode 0775 that is too permissive (0755 was requested), refusing.
   (or)
Directory "/tmp/test-readlink_and_make_absolute" already exists, but is owned by 1001:1000 (1000:1000 was requested), refusing.

Assertion 'mkdir_safe(tempdir, 0755, getuid(), getgid(), MKDIR_WARN_MODE) >= 0' failed at ../src/test/test-fs-util.c:320, function test_readlink_and_make_absolute(). Aborting.

No functional change except for the new log lines.
2018-03-23 10:26:38 +01:00

46 lines
1.8 KiB
C

/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
Copyright 2013 Kay Sievers
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 <sys/types.h>
typedef enum MkdirFlags {
MKDIR_FOLLOW_SYMLINK = 1 << 0,
MKDIR_WARN_MODE = 1 << 1,
} MkdirFlags;
int mkdir_errno_wrapper(const char *pathname, mode_t mode);
int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid, MkdirFlags flags);
int mkdir_parents(const char *path, mode_t mode);
int mkdir_p(const char *path, mode_t mode);
/* mandatory access control(MAC) versions */
int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid, MkdirFlags flags);
int mkdir_parents_label(const char *path, mode_t mode);
int mkdir_p_label(const char *path, mode_t mode);
/* internally used */
typedef int (*mkdir_func_t)(const char *pathname, mode_t mode);
int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, MkdirFlags flags, mkdir_func_t _mkdir);
int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir);
int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir);