Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935925AbcKNIWF (ORCPT ); Mon, 14 Nov 2016 03:22:05 -0500 Received: from mail-pf0-f193.google.com ([209.85.192.193]:33634 "EHLO mail-pf0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932705AbcKNIWC (ORCPT ); Mon, 14 Nov 2016 03:22:02 -0500 From: Taeung Song To: Arnaldo Carvalho de Melo Cc: linux-kernel@vger.kernel.org, Jiri Olsa , Namhyung Kim , Ingo Molnar , Peter Zijlstra , Wang Nan , Taeung Song Subject: [PATCH v2 3/7] perf config: Parse arguments before getting functionality Date: Mon, 14 Nov 2016 17:21:38 +0900 Message-Id: <1479111702-5989-4-git-send-email-treeze.taeung@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1479111702-5989-1-git-send-email-treeze.taeung@gmail.com> References: <1479111702-5989-1-git-send-email-treeze.taeung@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2066 Lines: 79 You can get several config items as below, # perf config report.queue-size call-graph.record-mode but it would be needed to more precisely check arguments, before show_spec_config() takes over the arguments. The function would be also used for config write functionality in the near future. Cc: Namhyung Kim Cc: Jiri Olsa Cc: Wang Nan Signed-off-by: Taeung Song --- tools/perf/builtin-config.c | 42 ++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c index 7b24789..02def73 100644 --- a/tools/perf/builtin-config.c +++ b/tools/perf/builtin-config.c @@ -82,6 +82,38 @@ static int show_config(struct perf_config_set *set) return 0; } +static int parse_config_arg(const char *arg, char **var) +{ + const char *last_dot; + char *key; + + key = strdup(arg); + if (!key) { + pr_err("%s: strdup failed\n", __func__); + return -1; + } + + last_dot = strchr(key, '.'); + /* + * Since "key" actually contains the section name and the real + * config variable name separated by a dot, we have to know where the dot is. + */ + if (last_dot == NULL || last_dot == key) { + pr_err("The config variable does not contain a section: %s\n", arg); + goto out_err; + } + if (!last_dot[1]) { + pr_err("The config varible does not contain variable name: %s\n", arg); + goto out_err; + } + + *var = key; + return 0; +out_err: + free(key); + return -1; +} + int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused) { int i, ret = 0; @@ -135,8 +167,14 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused) break; } - for (i = 0; argv[i]; i++) - ret = show_spec_config(set, argv[i]); + for (i = 0; argv[i]; i++) { + char *var = NULL; + + if (parse_config_arg(argv[i], &var) < 0) + break; + ret = show_spec_config(set, var); + free(var); + } } perf_config_set__delete(set); -- 2.7.4