blob: b2a368ae295a1ecef1ae7c504784981a7df46003 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Ingo Molnar07800602009-04-20 15:00:56 +02002/*
3 * builtin-help.c
4 *
5 * Builtin help command
6 */
Arnaldo Carvalho de Melo8520a982019-08-29 16:18:59 -03007#include "util/cache.h"
Taeung Song41840d22016-06-23 17:55:17 +09008#include "util/config.h"
Arnaldo Carvalho de Melo8520a982019-08-29 16:18:59 -03009#include "util/strbuf.h"
Ingo Molnar07800602009-04-20 15:00:56 +020010#include "builtin.h"
Josh Poimboeuf4b6ab942015-12-15 09:39:39 -060011#include <subcmd/exec-cmd.h>
Ingo Molnar07800602009-04-20 15:00:56 +020012#include "common-cmds.h"
Josh Poimboeuf4b6ab942015-12-15 09:39:39 -060013#include <subcmd/parse-options.h>
14#include <subcmd/run-command.h>
15#include <subcmd/help.h>
Jiri Olsa84f5d362014-07-14 23:46:48 +020016#include "util/debug.h"
Ian Rogers0adea512023-04-10 09:25:07 -070017#include "util/util.h"
Arnaldo Carvalho de Melo877a7a12017-04-17 11:39:06 -030018#include <linux/kernel.h>
Arnaldo Carvalho de Melo8520a982019-08-29 16:18:59 -030019#include <linux/string.h>
Arnaldo Carvalho de Melo7f7c5362019-07-04 11:32:27 -030020#include <linux/zalloc.h>
Arnaldo Carvalho de Meloa43783a2017-04-18 10:46:11 -030021#include <errno.h>
Ian Rogers370ce162023-05-26 11:33:57 -070022#include <limits.h>
Arnaldo Carvalho de Melo7a8ef4c2017-04-19 20:57:47 -030023#include <stdio.h>
Arnaldo Carvalho de Melo215a0d32019-07-04 11:21:24 -030024#include <stdlib.h>
Arnaldo Carvalho de Melo8520a982019-08-29 16:18:59 -030025#include <string.h>
Arnaldo Carvalho de Melo7a8ef4c2017-04-19 20:57:47 -030026#include <sys/types.h>
27#include <sys/stat.h>
28#include <unistd.h>
Ingo Molnar07800602009-04-20 15:00:56 +020029
30static struct man_viewer_list {
31 struct man_viewer_list *next;
Arnaldo Carvalho de Melo79096752017-04-17 11:08:20 -030032 char name[0];
Ingo Molnar07800602009-04-20 15:00:56 +020033} *man_viewer_list;
34
35static struct man_viewer_info_list {
36 struct man_viewer_info_list *next;
37 const char *info;
Arnaldo Carvalho de Melo79096752017-04-17 11:08:20 -030038 char name[0];
Ingo Molnar07800602009-04-20 15:00:56 +020039} *man_viewer_info_list;
40
41enum help_format {
David Aherncc584822012-08-26 12:24:45 -060042 HELP_FORMAT_NONE,
Ingo Molnar07800602009-04-20 15:00:56 +020043 HELP_FORMAT_MAN,
44 HELP_FORMAT_INFO,
45 HELP_FORMAT_WEB,
46};
47
Ingo Molnar07800602009-04-20 15:00:56 +020048static enum help_format parse_help_format(const char *format)
49{
50 if (!strcmp(format, "man"))
51 return HELP_FORMAT_MAN;
52 if (!strcmp(format, "info"))
53 return HELP_FORMAT_INFO;
54 if (!strcmp(format, "web") || !strcmp(format, "html"))
55 return HELP_FORMAT_WEB;
David Aherncc584822012-08-26 12:24:45 -060056
57 pr_err("unrecognized help format '%s'", format);
58 return HELP_FORMAT_NONE;
Ingo Molnar07800602009-04-20 15:00:56 +020059}
60
61static const char *get_man_viewer_info(const char *name)
62{
63 struct man_viewer_info_list *viewer;
64
Thiago Farinac1e53012009-11-03 08:28:45 -050065 for (viewer = man_viewer_info_list; viewer; viewer = viewer->next) {
Ingo Molnar07800602009-04-20 15:00:56 +020066 if (!strcasecmp(name, viewer->name))
67 return viewer->info;
68 }
69 return NULL;
70}
71
72static int check_emacsclient_version(void)
73{
74 struct strbuf buffer = STRBUF_INIT;
75 struct child_process ec_process;
76 const char *argv_ec[] = { "emacsclient", "--version", NULL };
77 int version;
Masami Hiramatsub72ca402016-05-10 14:47:17 +090078 int ret = -1;
Ingo Molnar07800602009-04-20 15:00:56 +020079
80 /* emacsclient prints its version number on stderr */
81 memset(&ec_process, 0, sizeof(ec_process));
82 ec_process.argv = argv_ec;
83 ec_process.err = -1;
84 ec_process.stdout_to_stderr = 1;
85 if (start_command(&ec_process)) {
86 fprintf(stderr, "Failed to start emacsclient.\n");
87 return -1;
88 }
Masami Hiramatsub72ca402016-05-10 14:47:17 +090089 if (strbuf_read(&buffer, ec_process.err, 20) < 0) {
90 fprintf(stderr, "Failed to read emacsclient version\n");
91 goto out;
92 }
Ingo Molnar07800602009-04-20 15:00:56 +020093 close(ec_process.err);
94
95 /*
96 * Don't bother checking return value, because "emacsclient --version"
97 * seems to always exits with code 1.
98 */
99 finish_command(&ec_process);
100
Arnaldo Carvalho de Melo8e99b6d2017-07-20 15:27:39 -0300101 if (!strstarts(buffer.buf, "emacsclient")) {
Ingo Molnar07800602009-04-20 15:00:56 +0200102 fprintf(stderr, "Failed to parse emacsclient version.\n");
Masami Hiramatsub72ca402016-05-10 14:47:17 +0900103 goto out;
Ingo Molnar07800602009-04-20 15:00:56 +0200104 }
105
Arnaldo Carvalho de Melod1130682016-02-23 16:18:37 -0300106 version = atoi(buffer.buf + strlen("emacsclient"));
Ingo Molnar07800602009-04-20 15:00:56 +0200107
108 if (version < 22) {
109 fprintf(stderr,
110 "emacsclient version '%d' too old (< 22).\n",
111 version);
Masami Hiramatsub72ca402016-05-10 14:47:17 +0900112 } else
113 ret = 0;
114out:
Ingo Molnar07800602009-04-20 15:00:56 +0200115 strbuf_release(&buffer);
Masami Hiramatsub72ca402016-05-10 14:47:17 +0900116 return ret;
Ingo Molnar07800602009-04-20 15:00:56 +0200117}
118
Arnaldo Carvalho de Melo881c3622017-06-27 10:52:57 -0300119static void exec_failed(const char *cmd)
Ingo Molnar07800602009-04-20 15:00:56 +0200120{
Masami Hiramatsuede395d2014-08-14 02:22:53 +0000121 char sbuf[STRERR_BUFSIZE];
Arnaldo Carvalho de Melo881c3622017-06-27 10:52:57 -0300122 pr_warning("failed to exec '%s': %s", cmd, str_error_r(errno, sbuf, sizeof(sbuf)));
123}
Masami Hiramatsuede395d2014-08-14 02:22:53 +0000124
Arnaldo Carvalho de Melo881c3622017-06-27 10:52:57 -0300125static void exec_woman_emacs(const char *path, const char *page)
126{
Ingo Molnar07800602009-04-20 15:00:56 +0200127 if (!check_emacsclient_version()) {
128 /* This works only with emacsclient version >= 22. */
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300129 char *man_page;
Ingo Molnar07800602009-04-20 15:00:56 +0200130
131 if (!path)
132 path = "emacsclient";
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300133 if (asprintf(&man_page, "(woman \"%s\")", page) > 0) {
134 execlp(path, "emacsclient", "-e", man_page, NULL);
135 free(man_page);
136 }
Arnaldo Carvalho de Melo881c3622017-06-27 10:52:57 -0300137 exec_failed(path);
Ingo Molnar07800602009-04-20 15:00:56 +0200138 }
139}
140
Thiago Farinac1e53012009-11-03 08:28:45 -0500141static void exec_man_konqueror(const char *path, const char *page)
Ingo Molnar07800602009-04-20 15:00:56 +0200142{
143 const char *display = getenv("DISPLAY");
Masami Hiramatsuede395d2014-08-14 02:22:53 +0000144
Ingo Molnar07800602009-04-20 15:00:56 +0200145 if (display && *display) {
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300146 char *man_page;
Ingo Molnar07800602009-04-20 15:00:56 +0200147 const char *filename = "kfmclient";
148
149 /* It's simpler to launch konqueror using kfmclient. */
150 if (path) {
151 const char *file = strrchr(path, '/');
152 if (file && !strcmp(file + 1, "konqueror")) {
153 char *new = strdup(path);
154 char *dest = strrchr(new, '/');
155
156 /* strlen("konqueror") == strlen("kfmclient") */
157 strcpy(dest + 1, "kfmclient");
158 path = new;
159 }
160 if (file)
161 filename = file;
162 } else
163 path = "kfmclient";
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300164 if (asprintf(&man_page, "man:%s(1)", page) > 0) {
165 execlp(path, filename, "newTab", man_page, NULL);
166 free(man_page);
167 }
Arnaldo Carvalho de Melo881c3622017-06-27 10:52:57 -0300168 exec_failed(path);
Ingo Molnar07800602009-04-20 15:00:56 +0200169 }
170}
171
Thiago Farinac1e53012009-11-03 08:28:45 -0500172static void exec_man_man(const char *path, const char *page)
Ingo Molnar07800602009-04-20 15:00:56 +0200173{
174 if (!path)
175 path = "man";
176 execlp(path, "man", page, NULL);
Arnaldo Carvalho de Melo881c3622017-06-27 10:52:57 -0300177 exec_failed(path);
Ingo Molnar07800602009-04-20 15:00:56 +0200178}
179
180static void exec_man_cmd(const char *cmd, const char *page)
181{
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300182 char *shell_cmd;
Masami Hiramatsuede395d2014-08-14 02:22:53 +0000183
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300184 if (asprintf(&shell_cmd, "%s %s", cmd, page) > 0) {
185 execl("/bin/sh", "sh", "-c", shell_cmd, NULL);
186 free(shell_cmd);
187 }
Arnaldo Carvalho de Melo881c3622017-06-27 10:52:57 -0300188 exec_failed(cmd);
Ingo Molnar07800602009-04-20 15:00:56 +0200189}
190
191static void add_man_viewer(const char *name)
192{
193 struct man_viewer_list **p = &man_viewer_list;
194 size_t len = strlen(name);
195
196 while (*p)
197 p = &((*p)->next);
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200198 *p = zalloc(sizeof(**p) + len + 1);
Arnaldo Carvalho de Melob6313892018-12-06 11:20:21 -0300199 strcpy((*p)->name, name);
Ingo Molnar07800602009-04-20 15:00:56 +0200200}
201
202static int supported_man_viewer(const char *name, size_t len)
203{
204 return (!strncasecmp("man", name, len) ||
205 !strncasecmp("woman", name, len) ||
206 !strncasecmp("konqueror", name, len));
207}
208
209static void do_add_man_viewer_info(const char *name,
210 size_t len,
211 const char *value)
212{
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200213 struct man_viewer_info_list *new = zalloc(sizeof(*new) + len + 1);
Ingo Molnar07800602009-04-20 15:00:56 +0200214
215 strncpy(new->name, name, len);
216 new->info = strdup(value);
217 new->next = man_viewer_info_list;
218 man_viewer_info_list = new;
219}
220
Arnaldo Carvalho de Melo86e474f2017-06-27 10:59:28 -0300221static void unsupported_man_viewer(const char *name, const char *var)
222{
223 pr_warning("'%s': path for unsupported man viewer.\n"
224 "Please consider using 'man.<tool>.%s' instead.", name, var);
225}
226
Ingo Molnar07800602009-04-20 15:00:56 +0200227static int add_man_viewer_path(const char *name,
228 size_t len,
229 const char *value)
230{
231 if (supported_man_viewer(name, len))
232 do_add_man_viewer_info(name, len, value);
233 else
Arnaldo Carvalho de Melo86e474f2017-06-27 10:59:28 -0300234 unsupported_man_viewer(name, "cmd");
Ingo Molnar07800602009-04-20 15:00:56 +0200235
236 return 0;
237}
238
239static int add_man_viewer_cmd(const char *name,
240 size_t len,
241 const char *value)
242{
243 if (supported_man_viewer(name, len))
Arnaldo Carvalho de Melo86e474f2017-06-27 10:59:28 -0300244 unsupported_man_viewer(name, "path");
Ingo Molnar07800602009-04-20 15:00:56 +0200245 else
246 do_add_man_viewer_info(name, len, value);
247
248 return 0;
249}
250
251static int add_man_viewer_info(const char *var, const char *value)
252{
253 const char *name = var + 4;
254 const char *subkey = strrchr(name, '.');
255
Arnaldo Carvalho de Melo62d94b02017-06-27 11:22:31 -0300256 if (!subkey) {
257 pr_err("Config with no key for man viewer: %s", name);
258 return -1;
259 }
Ingo Molnar07800602009-04-20 15:00:56 +0200260
261 if (!strcmp(subkey, ".path")) {
262 if (!value)
263 return config_error_nonbool(var);
264 return add_man_viewer_path(name, subkey - name, value);
265 }
266 if (!strcmp(subkey, ".cmd")) {
267 if (!value)
268 return config_error_nonbool(var);
269 return add_man_viewer_cmd(name, subkey - name, value);
270 }
271
Arnaldo Carvalho de Melo59913aab2017-06-27 11:01:17 -0300272 pr_warning("'%s': unsupported man viewer sub key.", subkey);
Ingo Molnar07800602009-04-20 15:00:56 +0200273 return 0;
274}
275
276static int perf_help_config(const char *var, const char *value, void *cb)
277{
Arnaldo Carvalho de Melo2bae1d12012-10-01 15:20:58 -0300278 enum help_format *help_formatp = cb;
279
Ingo Molnar07800602009-04-20 15:00:56 +0200280 if (!strcmp(var, "help.format")) {
281 if (!value)
282 return config_error_nonbool(var);
Arnaldo Carvalho de Melo2bae1d12012-10-01 15:20:58 -0300283 *help_formatp = parse_help_format(value);
284 if (*help_formatp == HELP_FORMAT_NONE)
David Aherncc584822012-08-26 12:24:45 -0600285 return -1;
Ingo Molnar07800602009-04-20 15:00:56 +0200286 return 0;
287 }
288 if (!strcmp(var, "man.viewer")) {
289 if (!value)
290 return config_error_nonbool(var);
291 add_man_viewer(value);
292 return 0;
293 }
Namhyung Kim2f0af862017-11-14 09:15:42 +0900294 if (strstarts(var, "man."))
Ingo Molnar07800602009-04-20 15:00:56 +0200295 return add_man_viewer_info(var, value);
296
Wang Nanb8cbb342016-02-26 09:31:51 +0000297 return 0;
Ingo Molnar07800602009-04-20 15:00:56 +0200298}
299
300static struct cmdnames main_cmds, other_cmds;
301
302void list_common_cmds_help(void)
303{
Ingo Molnarf37a2912009-07-01 12:37:06 +0200304 unsigned int i, longest = 0;
Ingo Molnar07800602009-04-20 15:00:56 +0200305
306 for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
307 if (longest < strlen(common_cmds[i].name))
308 longest = strlen(common_cmds[i].name);
309 }
310
Ingo Molnar502fc5c2009-03-13 03:20:49 +0100311 puts(" The most commonly used perf commands are:");
Ingo Molnar07800602009-04-20 15:00:56 +0200312 for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
Amerigo Wang3912f2a2009-12-14 03:23:56 -0500313 printf(" %-*s ", longest, common_cmds[i].name);
Ingo Molnar07800602009-04-20 15:00:56 +0200314 puts(common_cmds[i].help);
315 }
316}
317
Ingo Molnar07800602009-04-20 15:00:56 +0200318static const char *cmd_to_page(const char *perf_cmd)
319{
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300320 char *s;
321
Ingo Molnar07800602009-04-20 15:00:56 +0200322 if (!perf_cmd)
323 return "perf";
Namhyung Kim2f0af862017-11-14 09:15:42 +0900324 else if (strstarts(perf_cmd, "perf"))
Ingo Molnar07800602009-04-20 15:00:56 +0200325 return perf_cmd;
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300326
327 return asprintf(&s, "perf-%s", perf_cmd) < 0 ? NULL : s;
Ingo Molnar07800602009-04-20 15:00:56 +0200328}
329
330static void setup_man_path(void)
331{
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300332 char *new_path;
Ingo Molnar07800602009-04-20 15:00:56 +0200333 const char *old_path = getenv("MANPATH");
334
335 /* We should always put ':' after our path. If there is no
336 * old_path, the ':' at the end will let 'man' to try
337 * system-wide paths after ours to find the manual page. If
338 * there is old_path, we need ':' as delimiter. */
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300339 if (asprintf(&new_path, "%s:%s", system_path(PERF_MAN_PATH), old_path ?: "") > 0) {
340 setenv("MANPATH", new_path, 1);
341 free(new_path);
342 } else {
Arnaldo Carvalho de Melo62d94b02017-06-27 11:22:31 -0300343 pr_err("Unable to setup man path");
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300344 }
Ingo Molnar07800602009-04-20 15:00:56 +0200345}
346
347static void exec_viewer(const char *name, const char *page)
348{
349 const char *info = get_man_viewer_info(name);
350
351 if (!strcasecmp(name, "man"))
352 exec_man_man(info, page);
353 else if (!strcasecmp(name, "woman"))
354 exec_woman_emacs(info, page);
355 else if (!strcasecmp(name, "konqueror"))
356 exec_man_konqueror(info, page);
357 else if (info)
358 exec_man_cmd(info, page);
359 else
Arnaldo Carvalho de Melo59913aab2017-06-27 11:01:17 -0300360 pr_warning("'%s': unknown man viewer.", name);
Ingo Molnar07800602009-04-20 15:00:56 +0200361}
362
David Aherncc584822012-08-26 12:24:45 -0600363static int show_man_page(const char *perf_cmd)
Ingo Molnar07800602009-04-20 15:00:56 +0200364{
365 struct man_viewer_list *viewer;
366 const char *page = cmd_to_page(perf_cmd);
367 const char *fallback = getenv("PERF_MAN_VIEWER");
368
369 setup_man_path();
370 for (viewer = man_viewer_list; viewer; viewer = viewer->next)
Ingo Molnar07800602009-04-20 15:00:56 +0200371 exec_viewer(viewer->name, page); /* will return when unable */
Thiago Farinac1e53012009-11-03 08:28:45 -0500372
Ingo Molnar07800602009-04-20 15:00:56 +0200373 if (fallback)
374 exec_viewer(fallback, page);
375 exec_viewer("man", page);
David Aherncc584822012-08-26 12:24:45 -0600376
377 pr_err("no man viewer handled the request");
378 return -1;
Ingo Molnar07800602009-04-20 15:00:56 +0200379}
380
David Aherncc584822012-08-26 12:24:45 -0600381static int show_info_page(const char *perf_cmd)
Ingo Molnar07800602009-04-20 15:00:56 +0200382{
383 const char *page = cmd_to_page(perf_cmd);
384 setenv("INFOPATH", system_path(PERF_INFO_PATH), 1);
385 execlp("info", "info", "perfman", page, NULL);
David Aherncc584822012-08-26 12:24:45 -0600386 return -1;
Ingo Molnar07800602009-04-20 15:00:56 +0200387}
388
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300389static int get_html_page_path(char **page_path, const char *page)
Ingo Molnar07800602009-04-20 15:00:56 +0200390{
391 struct stat st;
392 const char *html_path = system_path(PERF_HTML_PATH);
Ian Rogers370ce162023-05-26 11:33:57 -0700393 char path[PATH_MAX];
Ingo Molnar07800602009-04-20 15:00:56 +0200394
395 /* Check that we have a perf documentation directory. */
Ian Rogers370ce162023-05-26 11:33:57 -0700396 if (stat(mkpath(path, sizeof(path), "%s/perf.html", html_path), &st)
David Aherncc584822012-08-26 12:24:45 -0600397 || !S_ISREG(st.st_mode)) {
398 pr_err("'%s': not a documentation directory.", html_path);
399 return -1;
400 }
Ingo Molnar07800602009-04-20 15:00:56 +0200401
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300402 return asprintf(page_path, "%s/%s.html", html_path, page);
Ingo Molnar07800602009-04-20 15:00:56 +0200403}
404
405/*
406 * If open_html is not defined in a platform-specific way (see for
407 * example compat/mingw.h), we use the script web--browse to display
408 * HTML.
409 */
410#ifndef open_html
Ingo Molnar16f762a2009-05-27 09:10:38 +0200411static void open_html(const char *path)
Ingo Molnar07800602009-04-20 15:00:56 +0200412{
Josh Poimboeuf46113a52015-12-15 09:39:37 -0600413 execl_cmd("web--browse", "-c", "help.browser", path, NULL);
Ingo Molnar07800602009-04-20 15:00:56 +0200414}
415#endif
416
David Aherncc584822012-08-26 12:24:45 -0600417static int show_html_page(const char *perf_cmd)
Ingo Molnar07800602009-04-20 15:00:56 +0200418{
419 const char *page = cmd_to_page(perf_cmd);
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300420 char *page_path; /* it leaks but we exec bellow */
Ingo Molnar07800602009-04-20 15:00:56 +0200421
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300422 if (get_html_page_path(&page_path, page) < 0)
David Aherncc584822012-08-26 12:24:45 -0600423 return -1;
Ingo Molnar07800602009-04-20 15:00:56 +0200424
Arnaldo Carvalho de Meloa610f5c2016-03-23 15:44:09 -0300425 open_html(page_path);
David Aherncc584822012-08-26 12:24:45 -0600426
427 return 0;
Ingo Molnar07800602009-04-20 15:00:56 +0200428}
429
Arnaldo Carvalho de Melob0ad8ea2017-03-27 11:47:20 -0300430int cmd_help(int argc, const char **argv)
Ingo Molnar07800602009-04-20 15:00:56 +0200431{
Arnaldo Carvalho de Melo2bae1d12012-10-01 15:20:58 -0300432 bool show_all = false;
Namhyung Kim670ab5d2012-10-22 16:12:23 +0900433 enum help_format help_format = HELP_FORMAT_MAN;
Arnaldo Carvalho de Melo2bae1d12012-10-01 15:20:58 -0300434 struct option builtin_help_options[] = {
435 OPT_BOOLEAN('a', "all", &show_all, "print all available commands"),
436 OPT_SET_UINT('m', "man", &help_format, "show man page", HELP_FORMAT_MAN),
437 OPT_SET_UINT('w', "web", &help_format, "show manual in web browser",
438 HELP_FORMAT_WEB),
439 OPT_SET_UINT('i', "info", &help_format, "show info page",
440 HELP_FORMAT_INFO),
441 OPT_END(),
442 };
Yunlong Songe24a1102015-03-18 21:35:53 +0800443 const char * const builtin_help_subcommands[] = {
444 "buildid-cache", "buildid-list", "diff", "evlist", "help", "list",
445 "record", "report", "bench", "stat", "timechart", "top", "annotate",
Arnaldo Carvalho de Melo35563772017-01-05 15:33:32 -0300446 "script", "sched", "kallsyms", "kmem", "lock", "kvm", "test", "inject", "mem", "data",
Yunlong Songe24a1102015-03-18 21:35:53 +0800447#ifdef HAVE_LIBELF_SUPPORT
448 "probe",
449#endif
Jin Yao22e9af42018-04-09 18:26:48 +0800450#if defined(HAVE_LIBAUDIT_SUPPORT) || defined(HAVE_SYSCALL_TABLE_SUPPORT)
Yunlong Songe24a1102015-03-18 21:35:53 +0800451 "trace",
452#endif
453 NULL };
454 const char *builtin_help_usage[] = {
Arnaldo Carvalho de Melo2bae1d12012-10-01 15:20:58 -0300455 "perf help [--all] [--man|--web|--info] [command]",
456 NULL
457 };
Arnaldo Carvalho de Meloecc4c562017-01-24 13:44:10 -0300458 int rc;
Ingo Molnarf37a2912009-07-01 12:37:06 +0200459
Ingo Molnar07800602009-04-20 15:00:56 +0200460 load_command_list("perf-", &main_cmds, &other_cmds);
461
Arnaldo Carvalho de Meloecc4c562017-01-24 13:44:10 -0300462 rc = perf_config(perf_help_config, &help_format);
463 if (rc)
464 return rc;
Ingo Molnar07800602009-04-20 15:00:56 +0200465
Yunlong Songe24a1102015-03-18 21:35:53 +0800466 argc = parse_options_subcommand(argc, argv, builtin_help_options,
467 builtin_help_subcommands, builtin_help_usage, 0);
Ingo Molnar07800602009-04-20 15:00:56 +0200468
469 if (show_all) {
Yunlong Song3a134ae2015-10-15 15:39:51 +0800470 printf("\n Usage: %s\n\n", perf_usage_string);
Ingo Molnar07800602009-04-20 15:00:56 +0200471 list_commands("perf commands", &main_cmds, &other_cmds);
Ingo Molnar502fc5c2009-03-13 03:20:49 +0100472 printf(" %s\n\n", perf_more_info_string);
Ingo Molnar07800602009-04-20 15:00:56 +0200473 return 0;
474 }
475
476 if (!argv[0]) {
Ingo Molnar502fc5c2009-03-13 03:20:49 +0100477 printf("\n usage: %s\n\n", perf_usage_string);
Ingo Molnar07800602009-04-20 15:00:56 +0200478 list_common_cmds_help();
Ingo Molnar502fc5c2009-03-13 03:20:49 +0100479 printf("\n %s\n\n", perf_more_info_string);
Ingo Molnar07800602009-04-20 15:00:56 +0200480 return 0;
481 }
482
Ingo Molnar07800602009-04-20 15:00:56 +0200483 switch (help_format) {
484 case HELP_FORMAT_MAN:
David Aherncc584822012-08-26 12:24:45 -0600485 rc = show_man_page(argv[0]);
Ingo Molnar07800602009-04-20 15:00:56 +0200486 break;
487 case HELP_FORMAT_INFO:
David Aherncc584822012-08-26 12:24:45 -0600488 rc = show_info_page(argv[0]);
Ingo Molnar07800602009-04-20 15:00:56 +0200489 break;
490 case HELP_FORMAT_WEB:
David Aherncc584822012-08-26 12:24:45 -0600491 rc = show_html_page(argv[0]);
492 break;
493 case HELP_FORMAT_NONE:
494 /* fall-through */
Ingo Molnar83a09442009-08-15 12:26:57 +0200495 default:
David Aherncc584822012-08-26 12:24:45 -0600496 rc = -1;
Ingo Molnar07800602009-04-20 15:00:56 +0200497 break;
498 }
499
David Aherncc584822012-08-26 12:24:45 -0600500 return rc;
Ingo Molnar07800602009-04-20 15:00:56 +0200501}