Try to open client socket in fr_server_domain_socket_perm()

Just like in fr_server_domain_socket_peercred()

diff --git a/src/main/command.c b/src/main/command.c
index 8242e41c0558e43c4506e1de264b1ea13b1357a7..99fa117d950f2e96d2a62bc534d0b36ea2f60812 100644 (file)
--- a/src/main/command.c
+++ b/src/main/command.c
@@ -466,6 +466,7 @@ static int fr_server_domain_socket_perm(char const *path, uid_t uid, gid_t gid)
         */
        } else {
                int ret;
+               int client_fd;
 
                ret = fstat(dir_fd, &st);
                if (ret < 0) {
@@ -516,7 +517,19 @@ static int fr_server_domain_socket_perm(char const *path, uid_t uid, gid_t gid)
                                           "permissions are %s (%s)", str_need, oct_need, str_have, oct_have);
                        goto error;
                }
+
+               /*
+                *      Check if a server is already listening on the
+                *      socket?
+                */
+               client_fd = fr_socket_client_unix(path, false);
+               if (client_fd >= 0) {
+                       fr_strerror_printf("Control socket '%s' is already in use", path);
+                       close(client_fd);
+                       return -1;
+               }
        }
+
        name = strrchr(path, FR_DIR_SEP);
        if (!name) {
                fr_strerror_printf("Can't determine socket name");