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-rw-r--r--src/libbasic/login-util.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/src/libbasic/login-util.c b/src/libbasic/login-util.c
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+++ b/src/libbasic/login-util.c
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+/***
+ This file is part of systemd.
+
+ Copyright 2013 Zbigniew Jędrzejewski-Szmek
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <string.h>
+
+#include "login-util.h"
+#include "string-util.h"
+
+bool session_id_valid(const char *id) {
+
+ if (isempty(id))
+ return false;
+
+ return id[strspn(id, LETTERS DIGITS)] == '\0';
+}