hostname-util: add relax parameter to hostname_is_valid

Tests are modified to check behaviour with relax and without relax.
New tests are added for hostname_cleanup().
Tests are moved a new file (test-hostname-util) because there's
now a bunch of them.

New parameter is not used anywhere, except in tests, so there should
be no observable change.

1 files changed, 163 insertions, 0 deletions

diff --git a/src/test/test-hostname-util.c b/src/test/test-hostname-util.c
new file mode 100644
index 0000000000..2357ab5758
--- /dev/null
+++ b/src/test/test-hostname-util.c
@@ -0,0 +1,163 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+  Copyright 2013 Thomas H.P. Andersen
+  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 "util.h"
+#include "fileio.h"
+#include "hostname-util.h"
+
+static void test_hostname_is_valid(void) {
+        assert_se(hostname_is_valid("foobar", false));
+        assert_se(hostname_is_valid("foobar.com", false));
+        assert_se(!hostname_is_valid("foobar.com.", false));
+        assert_se(hostname_is_valid("fooBAR", false));
+        assert_se(hostname_is_valid("fooBAR.com", false));
+        assert_se(!hostname_is_valid("fooBAR.", false));
+        assert_se(!hostname_is_valid("fooBAR.com.", false));
+        assert_se(!hostname_is_valid("fööbar", false));
+        assert_se(!hostname_is_valid("", false));
+        assert_se(!hostname_is_valid(".", false));
+        assert_se(!hostname_is_valid("..", false));
+        assert_se(!hostname_is_valid("foobar.", false));
+        assert_se(!hostname_is_valid(".foobar", false));
+        assert_se(!hostname_is_valid("foo..bar", false));
+        assert_se(!hostname_is_valid("foo.bar..", false));
+        assert_se(!hostname_is_valid("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", false));
+
+        assert_se(hostname_is_valid("foobar", true));
+        assert_se(hostname_is_valid("foobar.com", true));
+        assert_se(hostname_is_valid("foobar.com.", true));
+        assert_se(hostname_is_valid("fooBAR", true));
+        assert_se(hostname_is_valid("fooBAR.com", true));
+        assert_se(!hostname_is_valid("fooBAR.", true));
+        assert_se(hostname_is_valid("fooBAR.com.", true));
+        assert_se(!hostname_is_valid("fööbar", true));
+        assert_se(!hostname_is_valid("", true));
+        assert_se(!hostname_is_valid(".", true));
+        assert_se(!hostname_is_valid("..", true));
+        assert_se(!hostname_is_valid("foobar.", true));
+        assert_se(!hostname_is_valid(".foobar", true));
+        assert_se(!hostname_is_valid("foo..bar", true));
+        assert_se(!hostname_is_valid("foo.bar..", true));
+        assert_se(!hostname_is_valid("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", true));
+}
+
+static void test_hostname_cleanup(void) {
+        char *s;
+
+        s = strdupa("foobar");
+        assert_se(streq(hostname_cleanup(s, false), "foobar"));
+        s = strdupa("foobar.com");
+        assert_se(streq(hostname_cleanup(s, false), "foobar.com"));
+        s = strdupa("foobar.com.");
+        assert_se(streq(hostname_cleanup(s, false), "foobar.com"));
+        s = strdupa("fooBAR");
+        assert_se(streq(hostname_cleanup(s, false), "fooBAR"));
+        s = strdupa("fooBAR.com");
+        assert_se(streq(hostname_cleanup(s, false), "fooBAR.com"));
+        s = strdupa("fooBAR.");
+        assert_se(streq(hostname_cleanup(s, false), "fooBAR"));
+        s = strdupa("fooBAR.com.");
+        assert_se(streq(hostname_cleanup(s, false), "fooBAR.com"));
+        s = strdupa("fööbar");
+        assert_se(streq(hostname_cleanup(s, false), "fbar"));
+        s = strdupa("");
+        assert_se(isempty(hostname_cleanup(s, false)));
+        s = strdupa(".");
+        assert_se(isempty(hostname_cleanup(s, false)));
+        s = strdupa("..");
+        assert_se(isempty(hostname_cleanup(s, false)));
+        s = strdupa("foobar.");
+        assert_se(streq(hostname_cleanup(s, false), "foobar"));
+        s = strdupa(".foobar");
+        assert_se(streq(hostname_cleanup(s, false), "foobar"));
+        s = strdupa("foo..bar");
+        assert_se(streq(hostname_cleanup(s, false), "foo.bar"));
+        s = strdupa("foo.bar..");
+        assert_se(streq(hostname_cleanup(s, false), "foo.bar"));
+        s = strdupa("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
+        assert_se(streq(hostname_cleanup(s, false), "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"));
+}
+
+static void test_read_hostname_config(void) {
+        char path[] = "/tmp/hostname.XXXXXX";
+        char *hostname;
+        int fd;
+
+        fd = mkostemp_safe(path, O_RDWR|O_CLOEXEC);
+        assert(fd > 0);
+        close(fd);
+
+        /* simple hostname */
+        write_string_file(path, "foo", WRITE_STRING_FILE_CREATE);
+        assert_se(read_hostname_config(path, &hostname) == 0);
+        assert_se(streq(hostname, "foo"));
+        free(hostname);
+        hostname = NULL;
+
+        /* with comment */
+        write_string_file(path, "# comment\nfoo", WRITE_STRING_FILE_CREATE);
+        assert_se(read_hostname_config(path, &hostname) == 0);
+        assert_se(hostname);
+        assert_se(streq(hostname, "foo"));
+        free(hostname);
+        hostname = NULL;
+
+        /* with comment and extra whitespace */
+        write_string_file(path, "# comment\n\n foo ", WRITE_STRING_FILE_CREATE);
+        assert_se(read_hostname_config(path, &hostname) == 0);
+        assert_se(hostname);
+        assert_se(streq(hostname, "foo"));
+        free(hostname);
+        hostname = NULL;
+
+        /* cleans up name */
+        write_string_file(path, "!foo/bar.com", WRITE_STRING_FILE_CREATE);
+        assert_se(read_hostname_config(path, &hostname) == 0);
+        assert_se(hostname);
+        assert_se(streq(hostname, "foobar.com"));
+        free(hostname);
+        hostname = NULL;
+
+        /* no value set */
+        hostname = (char*) 0x1234;
+        write_string_file(path, "# nothing here\n", WRITE_STRING_FILE_CREATE);
+        assert_se(read_hostname_config(path, &hostname) == -ENOENT);
+        assert_se(hostname == (char*) 0x1234);  /* does not touch argument on error */
+
+        /* nonexisting file */
+        assert_se(read_hostname_config("/non/existing", &hostname) == -ENOENT);
+        assert_se(hostname == (char*) 0x1234);  /* does not touch argument on error */
+
+        unlink(path);
+}
+
+int main(int argc, char *argv[]) {
+        log_parse_environment();
+        log_open();
+
+        test_hostname_is_valid();
+        test_hostname_cleanup();
+        test_read_hostname_config();
+
+        return 0;
+}