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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <sys/stat.h>
#include "fileio-label.h"
#include "fileio.h"
#include "selinux-util.h"
int write_string_file_full_label(int atfd, const char *fn, const char *line, WriteStringFileFlags flags, struct timespec *ts) {
int r;
r = mac_selinux_create_file_prepare_at(atfd, fn, S_IFREG);
if (r < 0)
return r;
r = write_string_file_full(atfd, fn, line, flags, ts);
mac_selinux_create_file_clear();
return r;
}
int create_shutdown_run_nologin_or_warn(void) {
int r;
/* This is used twice: once in systemd-user-sessions.service, in order to block logins when we
* actually go down, and once in systemd-logind.service when shutdowns are scheduled, and logins are
* to be turned off a bit in advance. We use the same wording of the message in both cases.
*
* Traditionally, there was only /etc/nologin, and we managed that. Then, in PAM 1.1
* support for /run/nologin was added as alternative
* (https://github.com/linux-pam/linux-pam/commit/e9e593f6ddeaf975b7fe8446d184e6bc387d450b).
* 13 years later we stopped managing /etc/nologin, leaving it for the administrator to manage.
*/
r = write_string_file_atomic_label("/run/nologin",
"System is going down. Unprivileged users are not permitted to log in anymore. "
"For technical details, see pam_nologin(8).");
if (r < 0)
return log_error_errno(r, "Failed to create /run/nologin: %m");
return 0;
}
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