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/*-*- 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 General Public License as published by
the Free Software Foundation; either version 2 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#ifdef HAVE_SELINUX
#include <selinux/selinux.h>
#endif
#include "selinux-setup.h"
#include "macro.h"
#include "util.h"
#include "log.h"
int selinux_setup(char *const argv[]) {
#ifdef HAVE_SELINUX
int enforce = 0;
usec_t n;
security_context_t con;
/* Already initialized? */
if (getcon_raw(&con) == 0) {
bool initialized;
initialized = !streq(con, "kernel");
freecon(con);
if (initialized)
return 0;
}
/* Before we load the policy we create a flag file to ensure
* that after the reexec we iterate through /run and /dev to
* relabel things. */
touch("/dev/.systemd-relabel-run-dev");
n = now(CLOCK_MONOTONIC);
if (selinux_init_load_policy(&enforce) == 0) {
char buf[FORMAT_TIMESPAN_MAX];
n = now(CLOCK_MONOTONIC) - n;
log_info("Successfully loaded SELinux policy in %s, reexecuting.",
format_timespan(buf, sizeof(buf), n));
/* FIXME: Ideally we'd just call setcon() here instead
* of having to reexecute ourselves here. */
execv(SYSTEMD_BINARY_PATH, argv);
log_error("Failed to reexecute: %m");
return -errno;
} else {
log_full(enforce > 0 ? LOG_ERR : LOG_WARNING, "Failed to load SELinux policy.");
unlink("/dev/.systemd-relabel-run-dev");
if (enforce > 0)
return -EIO;
}
#endif
return 0;
}
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