08c849815c
This reworks the SELinux and SMACK label fixing calls in a number of ways: 1. The two separate boolean arguments of these functions are converted into a flags type LabelFixFlags. 2. The operations are now implemented based on O_PATH. This should resolve TTOCTTOU races between determining the label for the file system object and applying it, as it it allows to pin the object while we are operating on it. 3. When changing a label fails we'll query the label previously set, and if matches what we want to set anyway we'll suppress the error. Also, all calls to label_fix() are now (void)ified, when we ignore the return values. Fixes: #8566
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2013 Intel Corporation
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Author: Auke Kok <auke-jan.h.kok@intel.com>
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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 <stdbool.h>
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#include <sys/types.h>
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#include "label.h"
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#include "macro.h"
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#define SMACK_FLOOR_LABEL "_"
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#define SMACK_STAR_LABEL "*"
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typedef enum SmackAttr {
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SMACK_ATTR_ACCESS,
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SMACK_ATTR_EXEC,
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SMACK_ATTR_MMAP,
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SMACK_ATTR_TRANSMUTE,
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SMACK_ATTR_IPIN,
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SMACK_ATTR_IPOUT,
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_SMACK_ATTR_MAX,
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_SMACK_ATTR_INVALID = -1,
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} SmackAttr;
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bool mac_smack_use(void);
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int mac_smack_fix(const char *path, LabelFixFlags flags);
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const char* smack_attr_to_string(SmackAttr i) _const_;
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SmackAttr smack_attr_from_string(const char *s) _pure_;
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int mac_smack_read(const char *path, SmackAttr attr, char **label);
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int mac_smack_read_fd(int fd, SmackAttr attr, char **label);
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int mac_smack_apply(const char *path, SmackAttr attr, const char *label);
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int mac_smack_apply_fd(int fd, SmackAttr attr, const char *label);
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int mac_smack_apply_pid(pid_t pid, const char *label);
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int mac_smack_copy(const char *dest, const char *src);
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