lsmem: cleanup for --summary=only

* don't fill scols table
* check for collision with raw,pairs and json options

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/sys-utils/lsmem.c b/sys-utils/lsmem.c
index 3ac1fd3bea3a13c91a928534f468d17f14d3402f..8ffd40975d99a46f27ecd1db15ed267f4f27ea81 100644 (file)
--- a/sys-utils/lsmem.c
+++ b/sys-utils/lsmem.c
@@ -493,6 +493,17 @@ int main(int argc, char **argv)
        if (argc != optind)
                lsmem_usage(stderr);
 
+       if (lsmem->want_table + lsmem->want_summary == 0)
+               errx(EXIT_FAILURE, _("options --{raw,json,pairs} and --summary=only are mutually exclusive"));
+
+       /* Shortcut to avoid scols machinery on --summary=only */
+       if (lsmem->want_table == 0 && lsmem->want_summary) {
+               read_basic_info(lsmem);
+               read_info(lsmem);
+               print_summary(lsmem);
+               return EXIT_SUCCESS;
+       }
+
        /*
         * Default columns
         */