bus: handle env vars safely

Make sure that our library is safe for usage in SUID programs when it
comes to env var handling

1 files changed, 64 insertions, 12 deletions

diff --git a/src/test/test-cgroup-util.c b/src/test/test-cgroup-util.c
index b30bf23a80..8e24d1ceca 100644
--- a/src/test/test-cgroup-util.c
+++ b/src/test/test-cgroup-util.c
@@ -1,27 +1,79 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  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 <assert.h>
 
 #include "util.h"
 #include "cgroup-util.h"
 
-#define check_c_t_u(path, code, result) \
-{ \
-   char a[] = path; \
-   char *unit = NULL; \
-   assert_se(cgroup_to_unit(a, &unit) == code); \
-   assert(code < 0 || streq(unit, result));                 \
-}
+static void check_c_t_u(const char *path, int code, const char *result) {
+        _cleanup_free_ char *unit = NULL;
 
+        assert_se(cg_cgroup_to_unit(path, &unit) == code);
+        assert_se(streq_ptr(unit, result));
+}
 
 static void test_cgroup_to_unit(void) {
-        check_c_t_u("/system/getty@.service/tty2", 0, "getty@tty2.service");
-        check_c_t_u("/system/getty@.service/", -EINVAL, "getty@tty2.service");
-        check_c_t_u("/system/getty@.service", -EINVAL, "getty@tty2.service");
-        check_c_t_u("/system/getty.service", 0, "getty.service");
-        check_c_t_u("/system/getty", -EINVAL, "getty.service");
+        check_c_t_u("getty@.service/tty2", 0, "getty@tty2.service");
+        check_c_t_u("getty@.service/tty2/xxx", 0, "getty@tty2.service");
+        check_c_t_u("getty@.service/", -EINVAL, NULL);
+        check_c_t_u("getty@.service", -EINVAL, NULL);
+        check_c_t_u("getty.service", 0, "getty.service");
+        check_c_t_u("getty", -EINVAL, NULL);
+}
+
+static void check_p_g_u(const char *path, int code, const char *result) {
+        _cleanup_free_ char *unit = NULL;
+
+        assert_se(cg_path_get_unit(path, &unit) == code);
+        assert_se(streq_ptr(unit, result));
+}
+
+static void check_p_g_u_u(const char *path, int code, const char *result) {
+        _cleanup_free_ char *unit = NULL;
+
+        assert_se(cg_path_get_user_unit(path, &unit) == code);
+        assert_se(streq_ptr(unit, result));
+}
+
+static void test_path_get_unit(void) {
+        check_p_g_u("/system/foobar.service/sdfdsaf", 0, "foobar.service");
+        check_p_g_u("/system/getty@.service/tty5", 0, "getty@tty5.service");
+        check_p_g_u("/system/getty@.service/tty5/aaa/bbb", 0, "getty@tty5.service");
+        check_p_g_u("/system/getty@.service/tty5/", 0, "getty@tty5.service");
+        check_p_g_u("/system/getty@tty6.service/tty5", 0, "getty@tty6.service");
+        check_p_g_u("sadfdsafsda", -ENOENT, NULL);
+        check_p_g_u("/system/getty####@tty6.service/tty5", -EINVAL, NULL);
+
+        check_p_g_u_u("/user/lennart/2/systemd-21548/foobar.service", 0, "foobar.service");
+        check_p_g_u_u("/user/lennart/2/systemd-21548/foobar.service/waldo", 0, "foobar.service");
+        check_p_g_u_u("/user/lennart/2/systemd-21548/foobar.service/waldo/uuuux", 0, "foobar.service");
+        check_p_g_u_u("/user/lennart/2/systemd-21548/waldo/waldo/uuuux", -EINVAL, NULL);
+        check_p_g_u_u("/user/lennart/2/foobar.service", -ENOENT, NULL);
+        check_p_g_u_u("/user/lennart/2/systemd-21548/foobar@.service/pie/pa/po", 0, "foobar@pie.service");
 }
 
 int main(void) {
         test_cgroup_to_unit();
+        test_path_get_unit();
 
         return 0;
 }