check_pgsql: Allow UNIX socket directories as hostname as well.

PostgreSQL accepts the directory name of its UNIX socket as hostname as well,
e.g. /var/run/postgresql/.

1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/check_pgsql.c b/plugins/check_pgsql.c
index cf526a6e..c20c9914 100644
--- a/plugins/check_pgsql.c
+++ b/plugins/check_pgsql.c
@@ -321,7 +321,7 @@ process_arguments (int argc, char **argv)
                         query_warning = optarg;
                         break;
                 case 'H':     /* host */
-                        if (!is_host (optarg))
+                        if ((*optarg != '/') && (!is_host (optarg)))
                                 usage2 (_("Invalid hostname/address"), optarg);
                         else
                                 pghost = optarg;