Documentation/accounting/getdelays.c: fix endless loop
Marcus Meissner [Thu, 15 Jan 2009 21:51:00 +0000 (13:51 -0800)]
When no option is passed to getdelays it just hangs, waiting
for a reply which will never come.

This patch prints usage() when no output marker is specified.

Signed-off-by: Marcus Meissner <meissner@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/accounting/getdelays.c

index cc49400..7ea2311 100644 (file)
@@ -392,6 +392,10 @@ int main(int argc, char *argv[])
                        goto err;
                }
        }
+       if (!maskset && !tid && !containerset) {
+               usage();
+               goto err;
+       }
 
        do {
                int i;