test: add test case for sysctl-util.[ch]

diff --git a/src/test/test-sysctl-util.c b/src/test/test-sysctl-util.c
index 991a1e336300dd8754f920945257286193c878e2..17ec04e732b13178c9dfe03fb169793358ce57f1 100644 (file)
--- a/src/test/test-sysctl-util.c
+++ b/src/test/test-sysctl-util.c
@@ -1,5 +1,9 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include "sd-id128.h"
+
+#include "errno-util.h"
+#include "hostname-util.h"
 #include "strv.h"
 #include "sysctl-util.h"
 #include "tests.h"
@@ -35,10 +39,44 @@ static void test_sysctl_normalize(void) {
         }
 }
 
+static void test_sysctl_read(void) {
+        _cleanup_free_ char *s = NULL, *h = NULL;
+        sd_id128_t a, b;
+        int r;
+
+        assert_se(sysctl_read("kernel/random/boot_id", &s) >= 0);
+        assert_se(sd_id128_from_string(s, &a) >= 0);
+        assert_se(sd_id128_get_boot(&b) >= 0);
+        assert_se(sd_id128_equal(a, b));
+        s = mfree(s);
+
+        assert_se(sysctl_read_ip_property(AF_INET, "lo", "forwarding", &s));
+        assert_se(STR_IN_SET(s, "0", "1"));
+
+        r = sysctl_write_ip_property(AF_INET, "lo", "forwarding", s);
+        assert_se(r >= 0 || ERRNO_IS_PRIVILEGE(r) || r == -EROFS);
+        s = mfree(s);
+
+        assert_se(sysctl_read_ip_property(AF_INET, NULL, "ip_forward", &s));
+        assert_se(STR_IN_SET(s, "0", "1"));
+
+        r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", s);
+        assert_se(r >= 0 || ERRNO_IS_PRIVILEGE(r) || r == -EROFS);
+        s = mfree(s);
+
+        assert_se(sysctl_read("kernel/hostname", &s) >= 0);
+        assert_se(gethostname_full(GET_HOSTNAME_ALLOW_NONE|GET_HOSTNAME_ALLOW_LOCALHOST, &h) >= 0);
+        assert_se(streq(s, h));
+
+        r = sysctl_write("kernel/hostname", s);
+        assert_se(r >= 0 || ERRNO_IS_PRIVILEGE(r) || r == -EROFS);
+}
+
 int main(int argc, char *argv[]) {
         test_setup_logging(LOG_INFO);
 
         test_sysctl_normalize();
+        test_sysctl_read();
 
         return 0;
 }