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perf tools: Introduce usage_with_options_msg() 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
tools/perf/builtin-evlist.c
View File

@ -61,8 +61,8 @@ int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
usage_with_options(evlist_usage, options);
if (details.event_group && (details.verbose || details.freq)) {
pr_err("--group option is not compatible with other options\n");
usage_with_options(evlist_usage, options);
usage_with_options_msg(evlist_usage, options,
"--group option is not compatible with other options\n");
}
return __cmd_evlist(input_name, &details);

20
tools/perf/builtin-probe.c
View File

@ -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);

11
tools/perf/builtin-record.c
View File

@ -1135,14 +1135,15 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
usage_with_options(record_usage, record_options);
if (nr_cgroups && !rec->opts.target.system_wide) {
ui__error("cgroup monitoring only available in"
" system-wide mode\n");
usage_with_options(record_usage, record_options);
usage_with_options_msg(record_usage, record_options,
"cgroup monitoring only available in system-wide mode");
}
if (rec->opts.record_switch_events &&
!perf_can_record_switch_events()) {
ui__error("kernel does not support recording context switch events (--switch-events option)\n");
usage_with_options(record_usage, record_options);
ui__error("kernel does not support recording context switch events\n");
parse_options_usage(record_usage, record_options, "switch-events", 0);
return -EINVAL;
}
if (!rec->itr) {

4
tools/perf/builtin-sched.c
View File

@ -1728,8 +1728,8 @@ static void setup_sorting(struct perf_sched *sched, const struct option *options
for (tok = strtok_r(str, ", ", &tmp);
tok; tok = strtok_r(NULL, ", ", &tmp)) {
if (sort_dimension__add(tok, &sched->sort_list) < 0) {
error("Unknown --sort key: `%s'", tok);
usage_with_options(usage_msg, options);
usage_with_options_msg(usage_msg, options,
"Unknown --sort key: `%s'", tok);
}
}

8
tools/perf/builtin-script.c
View File

@ -1767,9 +1767,9 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
if (!rec_script_path && !rep_script_path) {
fprintf(stderr, " Couldn't find script %s\n\n See perf"
usage_with_options_msg(script_usage, options,
"Couldn't find script `%s'\n\n See perf"
" script -l for available scripts.\n", argv[0]);
usage_with_options(script_usage, options);
}
if (is_top_script(argv[0])) {
@ -1780,10 +1780,10 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
rep_args = has_required_arg(rep_script_path);
rec_args = (argc - 1) - rep_args;
if (rec_args < 0) {
fprintf(stderr, " %s script requires options."
usage_with_options_msg(script_usage, options,
"`%s' script requires options."
"\n\n See perf script -l for available "
"scripts and options.\n", argv[0]);
usage_with_options(script_usage, options);
}
}

15
tools/perf/util/parse-options.c
View File

@ -760,6 +760,21 @@ void usage_with_options(const char * const *usagestr,
exit(129);
}
void usage_with_options_msg(const char * const *usagestr,
const struct option *opts, const char *fmt, ...)
{
va_list ap;
exit_browser(false);
va_start(ap, fmt);
strbuf_addv(&error_buf, fmt, ap);
va_end(ap);
usage_with_options_internal(usagestr, opts, 0, NULL);
exit(129);
}
int parse_options_usage(const char * const *usagestr,
const struct option *opts,
const char *optstr, bool short_opt)

4
tools/perf/util/parse-options.h
View File

@ -161,6 +161,10 @@ extern int parse_options_subcommand(int argc, const char **argv,
extern NORETURN void usage_with_options(const char * const *usagestr,
const struct option *options);
extern NORETURN __attribute__((format(printf,3,4)))
void usage_with_options_msg(const char * const *usagestr,
const struct option *options,
const char *fmt, ...);
/*----- incremantal advanced APIs -----*/

22
tools/perf/util/strbuf.c
View File

@ -82,23 +82,22 @@ void strbuf_add(struct strbuf *sb, const void *data, size_t len)
strbuf_setlen(sb, sb->len + len);
}
void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
void strbuf_addv(struct strbuf *sb, const char *fmt, va_list ap)
{
int len;
va_list ap;
va_list ap_saved;
if (!strbuf_avail(sb))
strbuf_grow(sb, 64);
va_start(ap, fmt);
va_copy(ap_saved, ap);
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
va_end(ap);
if (len < 0)
die("your vsnprintf is broken");
if (len > strbuf_avail(sb)) {
strbuf_grow(sb, len);
va_start(ap, fmt);
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
va_end(ap);
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap_saved);
va_end(ap_saved);
if (len > strbuf_avail(sb)) {
die("this should not happen, your vsnprintf is broken");
}
@ -106,6 +105,15 @@ void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
strbuf_setlen(sb, sb->len + len);
}
void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
strbuf_addv(sb, fmt, ap);
va_end(ap);
}
ssize_t strbuf_read(struct strbuf *sb, int fd, ssize_t hint)
{
size_t oldlen = sb->len;

2
tools/perf/util/strbuf.h
View File

@ -39,6 +39,7 @@
*/
#include <assert.h>
#include <stdarg.h>
extern char strbuf_slopbuf[];
struct strbuf {
@ -85,6 +86,7 @@ static inline void strbuf_addstr(struct strbuf *sb, const char *s) {
__attribute__((format(printf,2,3)))
extern void strbuf_addf(struct strbuf *sb, const char *fmt, ...);
extern void strbuf_addv(struct strbuf *sb, const char *fmt, va_list ap);
/* XXX: if read fails, any partial read is undone */
extern ssize_t strbuf_read(struct strbuf *, int fd, ssize_t hint);