hostnamectl: allow trailing dot on fqdn

When the user requests to set hostname, and we are setting both
pretty and static hostnames, and the name is a valid FQDN, we
use it as the static hostname, and unset the pretty hostname.
The change is that a FQDN with a trailing dot is accepted and ignored.

https://bugzilla.redhat.com/show_bug.cgi?id=1238246

Lowercasing of the static name is not done anymore.

$ hostnamectl set-hostname Foobar.
=> static is "Foobar", pretty is "Foobar."
$ hostnamectl set-hostname Foobar.org.
=> static is "Foobar.org", pretty is unset
$ hostnamectl set-hostname Foobar.org..
=> static is "Foobar.org", pretty is "Foobar.org.."

1 files changed, 10 insertions, 11 deletions

diff --git a/src/hostname/hostnamectl.c b/src/hostname/hostnamectl.c
index c996fc04a0..d194e9b629 100644
--- a/src/hostname/hostnamectl.c
+++ b/src/hostname/hostnamectl.c
@@ -252,7 +252,7 @@ static int set_simple_string(sd_bus *bus, const char *method, const char *value)
 
 static int set_hostname(sd_bus *bus, char **args, unsigned n) {
         _cleanup_free_ char *h = NULL;
-        const char *hostname = args[1];
+        char *hostname = args[1];
         int r;
 
         assert(args);
@@ -270,17 +270,16 @@ static int set_hostname(sd_bus *bus, char **args, unsigned n) {
                  * just set the passed hostname as static/dynamic
                  * hostname. */
 
-                h = strdup(hostname);
-                if (!h)
-                        return log_oom();
-
-                hostname_cleanup(h, true);
-
-                if (arg_static && streq(h, hostname))
+                if (arg_static && hostname_is_valid(hostname, true)) {
                         p = "";
-                else {
-                        p = hostname;
-                        hostname = h;
+                        /* maybe get rid of trailing dot */
+                        hostname = hostname_cleanup(hostname, false);
+                } else {
+                        p = h = strdup(hostname);
+                        if (!p)
+                                return log_oom();
+
+                        hostname_cleanup(hostname, false);
                 }
 
                 r = set_simple_string(bus, "SetPrettyHostname", p);