pgrep: distinguish between invalid commandline parameters and '-?'

A patch from Debian.

Bug-Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=413383
Backported-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/pgrep.c b/pgrep.c
index 7a2ffb807c7dec3d300fdb24643ee7789380b805..c8cd0cac3c8ae35c8cdb75ce49f9ae182b18bae6 100644 (file)
--- a/pgrep.c
+++ b/pgrep.c
@@ -684,7 +684,7 @@ static void parse_opts (int argc, char **argv)
 //             case 'z':   // Solaris: match by zone ID
 //                     break;
                case '?':
-                       usage (opt);
+                       usage (optopt ? optopt : opt);
                        break;
                }
        }