From: Namhyung Kim <namhy...@kernel.org> It's annoying to see error or help message when command has many options like in perf record, report or top. So setup pager when print parser error or help message - it should be OK since no UI is enabled at the parsing time. The usage_with_options() already disables it by calling exit_browser() anyway.
Signed-off-by: Namhyung Kim <namhy...@kernel.org> Acked-by: Ingo Molnar <mi...@kernel.org> Tested-by: Arnaldo Carvalho de Melo <a...@redhat.com> Cc: David Ahern <dsah...@gmail.com> Cc: Jiri Olsa <jo...@redhat.com> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Link: http://lkml.kernel.org/r/1445701767-12731-3-git-send-email-namhy...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/parse-options.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c index b8d98229a8af..eeeed98eb26d 100644 --- a/tools/perf/util/parse-options.c +++ b/tools/perf/util/parse-options.c @@ -7,6 +7,8 @@ #define OPT_SHORT 1 #define OPT_UNSET 2 +static struct strbuf error_buf = STRBUF_INIT; + static int opterror(const struct option *opt, const char *reason, int flags) { if (flags & OPT_SHORT) @@ -540,9 +542,11 @@ int parse_options_subcommand(int argc, const char **argv, const struct option *o exit(130); default: /* PARSE_OPT_UNKNOWN */ if (ctx.argv[0][1] == '-') { - error("unknown option `%s'", ctx.argv[0] + 2); + strbuf_addf(&error_buf, "unknown option `%s'", + ctx.argv[0] + 2); } else { - error("unknown switch `%c'", *ctx.opt); + strbuf_addf(&error_buf, "unknown switch `%c'", + *ctx.opt); } usage_with_options(usagestr, options); } @@ -711,6 +715,13 @@ int usage_with_options_internal(const char * const *usagestr, if (!usagestr) return PARSE_OPT_HELP; + setup_pager(); + + if (strbuf_avail(&error_buf)) { + fprintf(stderr, " Error: %s\n", error_buf.buf); + strbuf_release(&error_buf); + } + fprintf(stderr, "\n Usage: %s\n", *usagestr++); while (*usagestr && **usagestr) fprintf(stderr, " or: %s\n", *usagestr++); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
