1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
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 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
30 #include <selinux/selinux.h>
31 #include <selinux/label.h>
33 static struct selabel_handle *label_hnd = NULL;
35 static inline bool use_selinux(void) {
36 static int use_selinux_ind = -1;
38 if (use_selinux_ind < 0)
39 use_selinux_ind = is_selinux_enabled() > 0;
41 return use_selinux_ind;
46 int label_init(void) {
57 label_hnd = selabel_open(SELABEL_CTX_FILE, NULL, 0);
59 log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
60 "Failed to initialize SELinux context: %m");
61 r = security_getenforce() == 1 ? -errno : 0;
68 int label_fix(const char *path) {
73 security_context_t fcon;
75 if (!use_selinux() || !label_hnd)
80 r = selabel_lookup_raw(label_hnd, &fcon, path, st.st_mode);
82 /* If there's no label to set, then exit without warning */
83 if (r < 0 && errno == ENOENT)
87 r = setfilecon(path, fcon);
90 /* If the FS doesn't support labels, then exit without warning */
91 if (r < 0 && errno == ENOTSUP)
97 log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
98 "Unable to fix label of %s: %m", path);
99 r = security_getenforce() == 1 ? -errno : 0;
106 void label_finish(void) {
109 if (use_selinux() && label_hnd)
110 selabel_close(label_hnd);
114 int label_get_socket_label_from_exe(const char *exe, char **label) {
119 security_context_t mycon = NULL, fcon = NULL;
120 security_class_t sclass;
122 if (!use_selinux()) {
131 r = getfilecon(exe, &fcon);
135 sclass = string_to_security_class("process");
136 r = security_compute_create(mycon, fcon, sclass, (security_context_t *) label);
138 log_debug("SELinux Socket context for %s will be set to %s", exe, *label);
141 if (r < 0 && security_getenforce() == 1)
151 int label_fifofile_set(const char *path) {
155 security_context_t filecon = NULL;
157 if (!use_selinux() || !label_hnd)
160 if ((r = selabel_lookup_raw(label_hnd, &filecon, path, S_IFIFO)) == 0) {
161 if ((r = setfscreatecon(filecon)) < 0) {
162 log_error("Failed to set SELinux file context on %s: %m", path);
169 if (r < 0 && security_getenforce() == 0)
176 int label_symlinkfile_set(const char *path) {
180 security_context_t filecon = NULL;
182 if (!use_selinux() || !label_hnd)
185 if ((r = selabel_lookup_raw(label_hnd, &filecon, path, S_IFLNK)) == 0) {
186 if ((r = setfscreatecon(filecon)) < 0) {
187 log_error("Failed to set SELinux file context on %s: %m", path);
194 if (r < 0 && security_getenforce() == 0)
201 int label_socket_set(const char *label) {
207 if (setsockcreatecon((security_context_t) label) < 0) {
208 log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
209 "Failed to set SELinux context (%s) on socket: %m", label);
211 if (security_getenforce() == 1)
219 void label_file_clear(void) {
225 setfscreatecon(NULL);
229 void label_socket_clear(void) {
235 setsockcreatecon(NULL);
239 void label_free(const char *label) {
245 freecon((security_context_t) label);
253 /* Creates a directory and labels it according to the SELinux policy */
257 security_context_t fcon = NULL;
259 if (use_selinux() && label_hnd) {
261 if (path_is_absolute(path))
262 r = selabel_lookup_raw(label_hnd, &fcon, path, mode);
264 char *newpath = NULL;
266 if (!(newpath = path_make_absolute_cwd(path)))
269 r = selabel_lookup_raw(label_hnd, &fcon, newpath, mode);
274 r = setfscreatecon(fcon);
276 if (r < 0 && errno != ENOENT) {
277 log_error("Failed to set security context %s for %s: %m", fcon, path);
280 if (security_getenforce() == 1)
285 if ((r = mkdir(path, mode)) < 0)
289 if (use_selinux() && label_hnd) {
290 setfscreatecon(NULL);
296 return mkdir(path, mode);