[tip:perf/urgent] perf probe: Check hyphen only argument

[tip-bot for Masami Hiramatsu]

Commit-ID:  ce11a603ae40e0ad32aeb378cff81e3fdaec390d
Gitweb:     http://git.kernel.org/tip/ce11a603ae40e0ad32aeb378cff81e3fdaec390d
Author:     Masami Hiramatsu <mhiramat@xxxxxxxxxx>
AuthorDate: Tue, 15 Dec 2009 10:31:28 -0500
Committer:  Ingo Molnar <mingo@xxxxxxx>
CommitDate: Tue, 15 Dec 2009 20:22:00 +0100

perf probe: Check hyphen only argument

Check hyphen only command argument, because perf-probe doesn't
support event recording feature yet.

e.g.

 # perf probe -
  Error: '-' is not supported.

Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Jim Keniston <jkenisto@xxxxxxxxxx>
Cc: Ananth N Mavinakayanahalli <ananth@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Frank Ch. Eigler <fche@xxxxxxxxxx>
Cc: Jason Baron <jbaron@xxxxxxxxxx>
Cc: K.Prasad <prasad@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Cc: systemtap <systemtap@xxxxxxxxxxxxxxxxxx>
Cc: DLE <dle-develop@xxxxxxxxxxxxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
LKML-Reference: <20091215153128.17436.9266.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 tools/perf/builtin-probe.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 559eeb4..919037b 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -205,8 +205,13 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
 
 	argc = parse_options(argc, argv, options, probe_usage,
 			     PARSE_OPT_STOP_AT_NON_OPTION);
-	if (argc > 0)
+	if (argc > 0) {
+		if (strcmp(argv[0], "-") == 0) {
+			pr_warning("  Error: '-' is not supported.\n");
+			usage_with_options(probe_usage, options);
+		}
 		parse_probe_event_argv(argc, argv);
+	}
 
 	if ((!session.nr_probe && !session.dellist && !session.list_events))
 		usage_with_options(probe_usage, options);
--
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