diff options
author | Namhyung Kim <namhyung@kernel.org> | 2015-10-24 15:49:27 (GMT) |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-10-27 12:28:44 (GMT) |
commit | c71183697250b356be6c7c1abc2e9a74073e1dca (patch) | |
tree | 704044c1c38f9f0da738712b807fb01f201d3e59 | |
parent | 01b19455c08cc37d1c3ef174524278e84c92fec1 (diff) | |
download | linux-c71183697250b356be6c7c1abc2e9a74073e1dca.tar.xz |
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>
-rw-r--r-- | tools/perf/builtin-evlist.c | 4 | ||||
-rw-r--r-- | tools/perf/builtin-probe.c | 20 | ||||
-rw-r--r-- | tools/perf/builtin-record.c | 11 | ||||
-rw-r--r-- | tools/perf/builtin-sched.c | 4 | ||||
-rw-r--r-- | tools/perf/builtin-script.c | 8 | ||||
-rw-r--r-- | tools/perf/util/parse-options.c | 15 | ||||
-rw-r--r-- | tools/perf/util/parse-options.h | 4 | ||||
-rw-r--r-- | tools/perf/util/strbuf.c | 22 | ||||
-rw-r--r-- | tools/perf/util/strbuf.h | 2 |
9 files changed, 62 insertions, 28 deletions
diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c index 695ec5a..f4d6251 100644 --- a/tools/perf/builtin-evlist.c +++ b/tools/perf/builtin-evlist.c @@ -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); diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 530c3a2..132afc9 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -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); diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 2740d7a..de02267 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -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) { diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index 3396261..0ee6d90 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -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); } } diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 2653c02..278acb2 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -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); } } diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c index eeeed98..230e771 100644 --- a/tools/perf/util/parse-options.c +++ b/tools/perf/util/parse-options.c @@ -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) diff --git a/tools/perf/util/parse-options.h b/tools/perf/util/parse-options.h index 182c860..a8e407b 100644 --- a/tools/perf/util/parse-options.h +++ b/tools/perf/util/parse-options.h @@ -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 -----*/ diff --git a/tools/perf/util/strbuf.c b/tools/perf/util/strbuf.c index 4abe235..25671fa 100644 --- a/tools/perf/util/strbuf.c +++ b/tools/perf/util/strbuf.c @@ -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; diff --git a/tools/perf/util/strbuf.h b/tools/perf/util/strbuf.h index 436ac31..529f2f0 100644 --- a/tools/perf/util/strbuf.h +++ b/tools/perf/util/strbuf.h @@ -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); |