linux-kernel - [PATCH 4/5] trace-cmd: fix argument parsing minor BUG

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Message-Id: <20170423102258.21609-5-federico.vaga@vaga.pv.it>
Date:   Sun, 23 Apr 2017 12:22:57 +0200
From:   Federico Vaga <federico.vaga@...a.pv.it>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Federico Vaga <federico.vaga@...a.pv.it>
Subject: [PATCH 4/5] trace-cmd: fix argument parsing minor BUG

For some reason the list command does not use anymore `getopt()`
to parse the arguments, instead it uses a custum implementation.

During this change [5da0eff trace-cmd: Add regex for listing of events]
the variable `optind` has been forgotten.

To reproduce the problem try to use invalid arguments. The application
will not report the correct invalid argument

$ ./trace-cmd list -a
list: invalid option -- 'i'

Signed-off-by: Federico Vaga <federico.vaga@...a.pv.it>
---
 trace-cmd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/trace-cmd.c b/trace-cmd.c
index 1a62faa..a05df92 100644
--- a/trace-cmd.c
+++ b/trace-cmd.c
@@ -706,7 +706,7 @@ int main (int argc, char **argv)
 					break;
 				default:
 					fprintf(stderr, "list: invalid option -- '%c'\n",
-						argv[optind][1]);
+						argv[i][1]);
 					usage(argv);
 				}
 			}
-- 
2.9.3