test-acl-util: add new test

For now, only add_acls_for_user is tested. When run under root, it
actually sets the acls. When run under non-root, it sets the acls for
the user, which does nothing, but at least calls the functions.

.gitignore

@@ -133,6 +133,7 @@
 /systemd-vconsole-setup
 /tags
 /test-acd
+/test-acl-util
 /test-af-list
 /test-architecture
 /test-arphrd-list

Makefile.am

@@ -1499,6 +1499,11 @@ tests += \
 	test-dns-domain \
 	test-install-root
 
+if HAVE_ACL
+tests += \
+	test-acl-util
+endif
+
 EXTRA_DIST += \
 	test/a.service \
 	test/basic.target \
@@ -1846,6 +1851,12 @@ test_install_root_SOURCES = \
 test_install_root_LDADD = \
 	libshared.la
 
+test_acl_util_SOURCES = \
+	src/test/test-acl-util.c
+
+test_acl_util_LDADD = \
+	libshared.la
+
 test_namespace_LDADD = \
 	libcore.la
 

src/test/test-acl-util.c

@@ -0,0 +1,85 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2015 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 <fcntl.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "acl-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "string-util.h"
+#include "user-util.h"
+
+static void test_add_acls_for_user(void) {
+        char fn[] = "/tmp/test-empty.XXXXXX";
+        _cleanup_close_ int fd = -1;
+        char *cmd;
+        uid_t uid;
+        int r;
+
+        fd = mkostemp_safe(fn, O_RDWR|O_CLOEXEC);
+        assert_se(fd >= 0);
+
+        /* Use the mode that user journal files use */
+        assert(fchmod(fd, 0640) == 0);
+
+        cmd = strjoina("ls -l ", fn);
+        assert_se(system(cmd) == 0);
+
+        cmd = strjoina("getfacl -p ", fn);
+        assert_se(system(cmd) == 0);
+
+        if (getuid() == 0) {
+                const char *nobody = "nobody";
+                r = get_user_creds(&nobody, &uid, NULL, NULL, NULL);
+                if (r < 0)
+                        uid = 0;
+        } else
+                uid = getuid();
+
+        r = add_acls_for_user(fd, uid);
+        assert_se(r >= 0);
+
+        cmd = strjoina("ls -l ", fn);
+        assert_se(system(cmd) == 0);
+
+        cmd = strjoina("getfacl -p ", fn);
+        assert_se(system(cmd) == 0);
+
+        /* set the acls again */
+
+        r = add_acls_for_user(fd, uid);
+        assert_se(r >= 0);
+
+        cmd = strjoina("ls -l ", fn);
+        assert_se(system(cmd) == 0);
+
+        cmd = strjoina("getfacl -p ", fn);
+        assert_se(system(cmd) == 0);
+
+        unlink(fn);
+}
+
+int main(int argc, char **argv) {
+        test_add_acls_for_user();
+}