1 files changed, 41 insertions, 0 deletions
diff --git a/src/nologin.c b/src/nologin.c
new file mode 100644
index 0000000..a744281
--- /dev/null
+++ b/src/nologin.c
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2004 The FreeBSD Project.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <unistd.h>
+
+int main (void)
+{
+	const char *user, *tty;
+	uid_t uid;
+
+	tty = ttyname (0);
+	if (NULL == tty) {
+		tty = "UNKNOWN";
+	}
+	user = getlogin ();
+	if (NULL == user) {
+		user = "UNKNOWN";
+	}
+
+	char *ssh_origcmd = getenv("SSH_ORIGINAL_COMMAND");
+	uid = getuid (); /* getuid() is always successful */
+	openlog ("nologin", LOG_CONS, LOG_AUTH);
+	syslog (LOG_CRIT, "Attempted login by %s (UID: %d) on %s%s%s",
+	        user, uid, tty,
+		(ssh_origcmd ? " SSH_ORIGINAL_COMMAND=" : ""),
+		(ssh_origcmd ? ssh_origcmd : ""));
+	closelog ();
+
+	printf ("%s", "This account is currently not available.\n");
+
+	return EXIT_FAILURE;
+}