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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
commitb750101eb236130cf056c675997decbac904cc49 (patch)
treea5df1a06754bdd014cb975c051c83b01c9a97532 /src/shared/fileio-label.c
parentInitial commit. (diff)
downloadsystemd-b750101eb236130cf056c675997decbac904cc49.tar.xz
systemd-b750101eb236130cf056c675997decbac904cc49.zip
Adding upstream version 252.22.upstream/252.22
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/shared/fileio-label.c')
-rw-r--r--src/shared/fileio-label.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/shared/fileio-label.c b/src/shared/fileio-label.c
new file mode 100644
index 0000000..d03b054
--- /dev/null
+++ b/src/shared/fileio-label.c
@@ -0,0 +1,37 @@
+/* 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_atomic_label_ts(const char *fn, const char *line, struct timespec *ts) {
+ int r;
+
+ r = mac_selinux_create_file_prepare(fn, S_IFREG);
+ if (r < 0)
+ return r;
+
+ r = write_string_file_ts(fn, line, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC, 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. */
+
+ 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;
+}