[Dle-develop] [PATCH -tip 03/14] perf probe: Check hyphen only argument

[Masami H. <mhi...@re...>]

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 <mhi...@re...>
Cc: Ingo Molnar <mi...@el...>
Cc: Paul Mackerras <pa...@sa...>
Cc: Arnaldo Carvalho de Melo <ac...@re...>
Cc: Steven Rostedt <ro...@go...>
Cc: Jim Keniston <jke...@us...>
Cc: Ananth N Mavinakayanahalli <an...@in...>
Cc: Christoph Hellwig <hc...@in...>
Cc: Frank Ch. Eigler <fc...@re...>
Cc: Frederic Weisbecker <fwe...@gm...>
Cc: Jason Baron <jb...@re...>
Cc: K.Prasad <pr...@li...>
Cc: Peter Zijlstra <pe...@in...>
Cc: Srikar Dronamraju <sr...@li...>
---

 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);


-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhi...@re...