socket-util: modernize socknameinfo_pretty() a bit

src/basic/socket-util.c

@@ -628,28 +628,33 @@ int getsockname_pretty(int fd, char **ret) {
         return sockaddr_pretty(&sa.sa, salen, false, true, ret);
 }
 
-int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret) {
+int socknameinfo_pretty(const struct sockaddr *sa, socklen_t salen, char **ret) {
+        char host[NI_MAXHOST];
         int r;
-        char host[NI_MAXHOST], *ret;
 
-        assert(_ret);
+        assert(sa);
+        assert(salen > sizeof(sa_family_t));
 
-        r = getnameinfo(&sa->sa, salen, host, sizeof(host), NULL, 0, IDN_FLAGS);
+        r = getnameinfo(sa, salen, host, sizeof(host), /* service= */ NULL, /* service_len= */ 0, IDN_FLAGS);
         if (r != 0) {
-                int saved_errno = errno;
+                if (r == EAI_MEMORY)
+                        return log_oom_debug();
+                if (r == EAI_SYSTEM)
+                        log_debug_errno(errno, "getnameinfo() failed, ignoring: %m");
+                else
+                        log_debug("getnameinfo() failed, ignoring: %s", gai_strerror(r));
 
-                r = sockaddr_pretty(&sa->sa, salen, true, true, &ret);
-                if (r < 0)
-                        return r;
+                return sockaddr_pretty(sa, salen, /* translate_ipv6= */ true, /* include_port= */ true, ret);
+        }
 
-                log_debug_errno(saved_errno, "getnameinfo(%s) failed: %m", ret);
-        } else {
-                ret = strdup(host);
-                if (!ret)
+        if (ret) {
+                char *copy = strdup(host);
+                if (!copy)
                         return -ENOMEM;
+
+                *ret = copy;
         }
 
-        *_ret = ret;
         return 0;
 }
 

src/basic/socket-util.h

@@ -113,7 +113,7 @@ int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_
 int getpeername_pretty(int fd, bool include_port, char **ret);
 int getsockname_pretty(int fd, char **ret);
 
-int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret);
+int socknameinfo_pretty(const struct sockaddr *sa, socklen_t salen, char **_ret);
 
 const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_;
 SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_;

src/journal-remote/journal-remote.c

@@ -525,7 +525,7 @@ static int accept_connection(
                 if (r < 0)
                         return log_error_errno(r, "socket_address_print(): %m");
 
-                r = socknameinfo_pretty(&addr->sockaddr, addr->size, &b);
+                r = socknameinfo_pretty(&addr->sockaddr.sa, addr->size, &b);
                 if (r < 0)
                         return log_error_errno(r, "Resolving hostname failed: %m");