92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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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 <errno.h>
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#include <string.h>
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#include <systemd/sd-daemon.h>
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#include <systemd/sd-login.h>
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#include "logind-acl.h"
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#include "util.h"
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#include "log.h"
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int main(int argc, char *argv[]) {
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int r;
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const char *path = NULL, *seat;
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bool changed_acl = false;
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uid_t uid;
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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umask(0022);
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if (argc < 2 || argc > 3) {
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log_error("This program expects one or two arguments.");
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r = -EINVAL;
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goto finish;
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}
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/* Make sure we don't muck around with ACLs the system is not
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* running systemd. */
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if (!sd_booted())
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return 0;
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path = argv[1];
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seat = argc < 3 || isempty(argv[2]) ? "seat0" : argv[2];
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r = sd_seat_get_active(seat, NULL, &uid);
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if (r == -ENOENT) {
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/* No active session on this seat */
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r = 0;
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goto finish;
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} else if (r < 0) {
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log_error("Failed to determine active user on seat %s.", seat);
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goto finish;
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}
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r = devnode_acl(path, true, false, 0, true, uid);
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if (r < 0) {
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log_error("Failed to apply ACL on %s: %s", path, strerror(-r));
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goto finish;
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}
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changed_acl = true;
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r = 0;
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finish:
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if (path && !changed_acl) {
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int k;
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/* Better be safe that sorry and reset ACL */
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k = devnode_acl(path, true, false, 0, false, 0);
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if (k < 0) {
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log_error("Failed to apply ACL on %s: %s", path, strerror(-k));
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if (r >= 0)
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r = k;
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}
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}
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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