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perf tools: Introduce usage_with_options_msg()

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Now usage_with_options() setup a pager before printing message so normal
printf() or pr_err() will not be shown.  The usage_with_options_msg()
can be used to print some help message before usage strings.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445701767-12731-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2015-10-25 00:49:27 +09:00
committed by Arnaldo Carvalho de Melo
parent 01b19455c0
commit c711836972
9 changed files with 62 additions and 28 deletions
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20
tools/perf/builtin-probe.c
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@@ -528,12 +528,12 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
PARSE_OPT_STOP_AT_NON_OPTION);
if (argc > 0) {
if (strcmp(argv[0], "-") == 0) {
pr_warning(" Error: '-' is not supported.\n");
usage_with_options(probe_usage, options);
usage_with_options_msg(probe_usage, options,
"'-' is not supported.\n");
}
if (params.command && params.command != 'a') {
pr_warning(" Error: another command except --add is set.\n");
usage_with_options(probe_usage, options);
usage_with_options_msg(probe_usage, options,
"another command except --add is set.\n");
}
ret = parse_probe_event_argv(argc, argv);
if (ret < 0) {
@@ -562,8 +562,10 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
switch (params.command) {
case 'l':
if (params.uprobes) {
pr_warning(" Error: Don't use --list with --exec.\n");
usage_with_options(probe_usage, options);
pr_err(" Error: Don't use --list with --exec.\n");
parse_options_usage(probe_usage, options, "l", true);
parse_options_usage(NULL, options, "x", true);
return -EINVAL;
}
ret = show_perf_probe_events(params.filter);
if (ret < 0)
@@ -603,8 +605,10 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
case 'a':
/* Ensure the last given target is used */
if (params.target && !params.target_used) {
pr_warning(" Error: -x/-m must follow the probe definitions.\n");
usage_with_options(probe_usage, options);
pr_err(" Error: -x/-m must follow the probe definitions.\n");
parse_options_usage(probe_usage, options, "m", true);
parse_options_usage(NULL, options, "x", true);
return -EINVAL;
}
ret = perf_add_probe_events(params.events, params.nevents);