perf tools: Long option completion support for each subcommands
Add internal --list-opts option to print all of long option names to
stdout so that it can be used for bash completion engine.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1349191294-6926-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
index 443fc11..2bc9e70 100644
--- a/tools/perf/util/parse-options.c
+++ b/tools/perf/util/parse-options.c
@@ -384,6 +384,8 @@
return usage_with_options_internal(usagestr, options, 1);
if (internal_help && !strcmp(arg + 2, "help"))
return parse_options_usage(usagestr, options);
+ if (!strcmp(arg + 2, "list-opts"))
+ return PARSE_OPT_LIST;
switch (parse_long_opt(ctx, arg + 2, options)) {
case -1:
return parse_options_usage(usagestr, options);
@@ -422,6 +424,12 @@
exit(129);
case PARSE_OPT_DONE:
break;
+ case PARSE_OPT_LIST:
+ while (options->type != OPTION_END) {
+ printf("--%s ", options->long_name);
+ options++;
+ }
+ exit(130);
default: /* PARSE_OPT_UNKNOWN */
if (ctx.argv[0][1] == '-') {
error("unknown option `%s'", ctx.argv[0] + 2);