[PATCH 38/63] perf config: Show the configuration when no arguments are provided

Arnaldo Carvalho de Melo
2018-12-18T22:13:22Z

More convenient thah having to recall what letter is about
showing/listing/dumping the configuration, i.e. no arguments means
-l/--list:

# perf config
llvm.dump-obj=true
trace.default_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o
trace.show_zeros=yes
trace.show_duration=no
# perf config -l
llvm.dump-obj=true
trace.default_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o
trace.show_zeros=yes
trace.show_duration=no
# perf config -h

Usage: perf config [<file-option>] [options] [section.name[=value] ...]

-l, --list show current config variables
--system use system config file
--user use user config file

#

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-z2n63avz6tliqb5gmu4l1dti@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-config.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index 514f70f95b57..d76f831f94c7 100644
--- a/tools/perf/builtin-config.c
+++ b/tools/perf/builtin-config.c
@@ -196,6 +196,7 @@ int cmd_config(int argc, const char **argv)
pr_err("Error: takes no arguments\n");
parse_options_usage(config_usage, config_options, "l", 1);
} else {
+do_action_list:
if (show_config(set) < 0) {
pr_err("Nothing configured, "
"please check your %s \n", config_filename);
@@ -204,10 +205,8 @@ int cmd_config(int argc, const char **argv)
}
break;
default:
- if (!argc) {
- usage_with_options(config_usage, config_options);
- break;
- }
+ if (!argc)
+ goto do_action_list;

for (i = 0; argv[i]; i++) {
char *var, *value;
--
2.19.2