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Commit | Line | Data |
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bf9e1876 IM |
1 | /* |
2 | * perf.c | |
3 | * | |
4 | * Performance analysis utility. | |
5 | * | |
6 | * This is the main hub from which the sub-commands (perf stat, | |
7 | * perf top, perf record, perf report, etc.) are started. | |
8 | */ | |
07800601 | 9 | #include "builtin.h" |
bf9e1876 | 10 | |
aa36ddd7 | 11 | #include "util/env.h" |
4b6ab94e | 12 | #include <subcmd/exec-cmd.h> |
41840d21 | 13 | #include "util/config.h" |
148be2c1 | 14 | #include "util/quote.h" |
4b6ab94e | 15 | #include <subcmd/run-command.h> |
5beeded1 | 16 | #include "util/parse-events.h" |
4b6ab94e | 17 | #include <subcmd/parse-options.h> |
84c86ca1 | 18 | #include "util/bpf-loader.h" |
bbb2cea7 | 19 | #include "util/debug.h" |
4cb93446 | 20 | #include <api/fs/fs.h> |
592d5a6b | 21 | #include <api/fs/tracing_path.h> |
a43783ae | 22 | #include <errno.h> |
27683dc5 | 23 | #include <pthread.h> |
9607ad3a | 24 | #include <signal.h> |
14cbfbeb NK |
25 | #include <stdlib.h> |
26 | #include <time.h> | |
7a8ef4c4 ACM |
27 | #include <sys/types.h> |
28 | #include <sys/stat.h> | |
29 | #include <unistd.h> | |
877a7a11 | 30 | #include <linux/kernel.h> |
07800601 IM |
31 | |
32 | const char perf_usage_string[] = | |
78a1b503 | 33 | "perf [--version] [--help] [OPTIONS] COMMAND [ARGS]"; |
07800601 IM |
34 | |
35 | const char perf_more_info_string[] = | |
36 | "See 'perf help COMMAND' for more information on a specific command."; | |
37 | ||
38 | static int use_pager = -1; | |
70cb4e96 | 39 | const char *input_name; |
5d06e691 | 40 | |
98a4179c FW |
41 | struct cmd_struct { |
42 | const char *cmd; | |
b0ad8ea6 | 43 | int (*fn)(int, const char **); |
98a4179c FW |
44 | int option; |
45 | }; | |
46 | ||
47 | static struct cmd_struct commands[] = { | |
48 | { "buildid-cache", cmd_buildid_cache, 0 }, | |
49 | { "buildid-list", cmd_buildid_list, 0 }, | |
30862f2c | 50 | { "config", cmd_config, 0 }, |
7aef3bf3 | 51 | { "c2c", cmd_c2c, 0 }, |
98a4179c FW |
52 | { "diff", cmd_diff, 0 }, |
53 | { "evlist", cmd_evlist, 0 }, | |
54 | { "help", cmd_help, 0 }, | |
35563771 | 55 | { "kallsyms", cmd_kallsyms, 0 }, |
98a4179c FW |
56 | { "list", cmd_list, 0 }, |
57 | { "record", cmd_record, 0 }, | |
58 | { "report", cmd_report, 0 }, | |
59 | { "bench", cmd_bench, 0 }, | |
60 | { "stat", cmd_stat, 0 }, | |
61 | { "timechart", cmd_timechart, 0 }, | |
62 | { "top", cmd_top, 0 }, | |
63 | { "annotate", cmd_annotate, 0 }, | |
64 | { "version", cmd_version, 0 }, | |
65 | { "script", cmd_script, 0 }, | |
66 | { "sched", cmd_sched, 0 }, | |
89fe808a | 67 | #ifdef HAVE_LIBELF_SUPPORT |
98a4179c | 68 | { "probe", cmd_probe, 0 }, |
393be2e3 | 69 | #endif |
98a4179c FW |
70 | { "kmem", cmd_kmem, 0 }, |
71 | { "lock", cmd_lock, 0 }, | |
72 | { "kvm", cmd_kvm, 0 }, | |
73 | { "test", cmd_test, 0 }, | |
89fe808a | 74 | #ifdef HAVE_LIBAUDIT_SUPPORT |
514f1c67 | 75 | { "trace", cmd_trace, 0 }, |
4d29089c | 76 | #endif |
98a4179c | 77 | { "inject", cmd_inject, 0 }, |
028f12ee | 78 | { "mem", cmd_mem, 0 }, |
2245bf14 | 79 | { "data", cmd_data, 0 }, |
d01f4e8d | 80 | { "ftrace", cmd_ftrace, 0 }, |
98a4179c FW |
81 | }; |
82 | ||
07800601 IM |
83 | struct pager_config { |
84 | const char *cmd; | |
85 | int val; | |
86 | }; | |
87 | ||
88 | static int pager_command_config(const char *var, const char *value, void *data) | |
89 | { | |
90 | struct pager_config *c = data; | |
91 | if (!prefixcmp(var, "pager.") && !strcmp(var + 6, c->cmd)) | |
92 | c->val = perf_config_bool(var, value); | |
93 | return 0; | |
94 | } | |
95 | ||
96 | /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */ | |
a3b70b3b | 97 | static int check_pager_config(const char *cmd) |
07800601 | 98 | { |
ecc4c561 | 99 | int err; |
07800601 IM |
100 | struct pager_config c; |
101 | c.cmd = cmd; | |
102 | c.val = -1; | |
ecc4c561 ACM |
103 | err = perf_config(pager_command_config, &c); |
104 | return err ?: c.val; | |
07800601 IM |
105 | } |
106 | ||
0020ce23 | 107 | static int browser_command_config(const char *var, const char *value, void *data) |
5d06e691 ACM |
108 | { |
109 | struct pager_config *c = data; | |
110 | if (!prefixcmp(var, "tui.") && !strcmp(var + 4, c->cmd)) | |
111 | c->val = perf_config_bool(var, value); | |
0020ce23 NK |
112 | if (!prefixcmp(var, "gtk.") && !strcmp(var + 4, c->cmd)) |
113 | c->val = perf_config_bool(var, value) ? 2 : 0; | |
5d06e691 ACM |
114 | return 0; |
115 | } | |
116 | ||
0020ce23 NK |
117 | /* |
118 | * returns 0 for "no tui", 1 for "use tui", 2 for "use gtk", | |
119 | * and -1 for "not specified" | |
120 | */ | |
121 | static int check_browser_config(const char *cmd) | |
5d06e691 | 122 | { |
ecc4c561 | 123 | int err; |
5d06e691 ACM |
124 | struct pager_config c; |
125 | c.cmd = cmd; | |
126 | c.val = -1; | |
ecc4c561 ACM |
127 | err = perf_config(browser_command_config, &c); |
128 | return err ?: c.val; | |
5d06e691 ACM |
129 | } |
130 | ||
4c574159 TF |
131 | static void commit_pager_choice(void) |
132 | { | |
07800601 IM |
133 | switch (use_pager) { |
134 | case 0: | |
096d3558 | 135 | setenv(PERF_PAGER_ENVIRONMENT, "cat", 1); |
07800601 IM |
136 | break; |
137 | case 1: | |
138 | /* setup_pager(); */ | |
139 | break; | |
140 | default: | |
141 | break; | |
142 | } | |
143 | } | |
144 | ||
7335399a YS |
145 | struct option options[] = { |
146 | OPT_ARGUMENT("help", "help"), | |
147 | OPT_ARGUMENT("version", "version"), | |
148 | OPT_ARGUMENT("exec-path", "exec-path"), | |
149 | OPT_ARGUMENT("html-path", "html-path"), | |
150 | OPT_ARGUMENT("paginate", "paginate"), | |
151 | OPT_ARGUMENT("no-pager", "no-pager"), | |
7335399a YS |
152 | OPT_ARGUMENT("debugfs-dir", "debugfs-dir"), |
153 | OPT_ARGUMENT("buildid-dir", "buildid-dir"), | |
154 | OPT_ARGUMENT("list-cmds", "list-cmds"), | |
155 | OPT_ARGUMENT("list-opts", "list-opts"), | |
156 | OPT_ARGUMENT("debug", "debug"), | |
157 | OPT_END() | |
158 | }; | |
159 | ||
4c574159 | 160 | static int handle_options(const char ***argv, int *argc, int *envchanged) |
07800601 IM |
161 | { |
162 | int handled = 0; | |
163 | ||
164 | while (*argc > 0) { | |
165 | const char *cmd = (*argv)[0]; | |
166 | if (cmd[0] != '-') | |
167 | break; | |
168 | ||
169 | /* | |
170 | * For legacy reasons, the "version" and "help" | |
171 | * commands can be written with "--" prepended | |
172 | * to make them look like flags. | |
173 | */ | |
174 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
175 | break; | |
176 | ||
a1853e2c JO |
177 | /* |
178 | * Shortcut for '-h' and '-v' options to invoke help | |
179 | * and version command. | |
180 | */ | |
181 | if (!strcmp(cmd, "-h")) { | |
182 | (*argv)[0] = "--help"; | |
183 | break; | |
184 | } | |
185 | ||
186 | if (!strcmp(cmd, "-v")) { | |
187 | (*argv)[0] = "--version"; | |
188 | break; | |
189 | } | |
190 | ||
07800601 IM |
191 | /* |
192 | * Check remaining flags. | |
193 | */ | |
cfed95a6 VL |
194 | if (!prefixcmp(cmd, CMD_EXEC_PATH)) { |
195 | cmd += strlen(CMD_EXEC_PATH); | |
07800601 | 196 | if (*cmd == '=') |
46113a54 | 197 | set_argv_exec_path(cmd + 1); |
07800601 | 198 | else { |
46113a54 | 199 | puts(get_argv_exec_path()); |
07800601 IM |
200 | exit(0); |
201 | } | |
202 | } else if (!strcmp(cmd, "--html-path")) { | |
203 | puts(system_path(PERF_HTML_PATH)); | |
204 | exit(0); | |
205 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { | |
206 | use_pager = 1; | |
207 | } else if (!strcmp(cmd, "--no-pager")) { | |
208 | use_pager = 0; | |
209 | if (envchanged) | |
210 | *envchanged = 1; | |
5beeded1 JB |
211 | } else if (!strcmp(cmd, "--debugfs-dir")) { |
212 | if (*argc < 2) { | |
213 | fprintf(stderr, "No directory given for --debugfs-dir.\n"); | |
214 | usage(perf_usage_string); | |
215 | } | |
65d4b265 | 216 | tracing_path_set((*argv)[1]); |
5beeded1 JB |
217 | if (envchanged) |
218 | *envchanged = 1; | |
219 | (*argv)++; | |
220 | (*argc)--; | |
99ce8e9f JO |
221 | } else if (!strcmp(cmd, "--buildid-dir")) { |
222 | if (*argc < 2) { | |
223 | fprintf(stderr, "No directory given for --buildid-dir.\n"); | |
224 | usage(perf_usage_string); | |
225 | } | |
226 | set_buildid_dir((*argv)[1]); | |
227 | if (envchanged) | |
228 | *envchanged = 1; | |
229 | (*argv)++; | |
230 | (*argc)--; | |
cfed95a6 | 231 | } else if (!prefixcmp(cmd, CMD_DEBUGFS_DIR)) { |
65d4b265 | 232 | tracing_path_set(cmd + strlen(CMD_DEBUGFS_DIR)); |
9f30fffc | 233 | fprintf(stderr, "dir: %s\n", tracing_path); |
5beeded1 JB |
234 | if (envchanged) |
235 | *envchanged = 1; | |
98a4179c FW |
236 | } else if (!strcmp(cmd, "--list-cmds")) { |
237 | unsigned int i; | |
238 | ||
239 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
240 | struct cmd_struct *p = commands+i; | |
241 | printf("%s ", p->cmd); | |
242 | } | |
ed457520 | 243 | putchar('\n'); |
98a4179c | 244 | exit(0); |
7335399a YS |
245 | } else if (!strcmp(cmd, "--list-opts")) { |
246 | unsigned int i; | |
247 | ||
248 | for (i = 0; i < ARRAY_SIZE(options)-1; i++) { | |
249 | struct option *p = options+i; | |
250 | printf("--%s ", p->long_name); | |
251 | } | |
252 | putchar('\n'); | |
253 | exit(0); | |
bbb2cea7 JO |
254 | } else if (!strcmp(cmd, "--debug")) { |
255 | if (*argc < 2) { | |
256 | fprintf(stderr, "No variable specified for --debug.\n"); | |
257 | usage(perf_usage_string); | |
258 | } | |
259 | if (perf_debug_option((*argv)[1])) | |
260 | usage(perf_usage_string); | |
261 | ||
262 | (*argv)++; | |
263 | (*argc)--; | |
07800601 IM |
264 | } else { |
265 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
266 | usage(perf_usage_string); | |
267 | } | |
268 | ||
269 | (*argv)++; | |
270 | (*argc)--; | |
271 | handled++; | |
272 | } | |
273 | return handled; | |
274 | } | |
275 | ||
07800601 IM |
276 | #define RUN_SETUP (1<<0) |
277 | #define USE_PAGER (1<<1) | |
07800601 | 278 | |
07800601 IM |
279 | static int run_builtin(struct cmd_struct *p, int argc, const char **argv) |
280 | { | |
281 | int status; | |
282 | struct stat st; | |
b2348e1d | 283 | char sbuf[STRERR_BUFSIZE]; |
07800601 | 284 | |
5d06e691 | 285 | if (use_browser == -1) |
0020ce23 | 286 | use_browser = check_browser_config(p->cmd); |
5d06e691 | 287 | |
07800601 IM |
288 | if (use_pager == -1 && p->option & RUN_SETUP) |
289 | use_pager = check_pager_config(p->cmd); | |
290 | if (use_pager == -1 && p->option & USE_PAGER) | |
291 | use_pager = 1; | |
292 | commit_pager_choice(); | |
293 | ||
2bdb2c27 | 294 | perf_env__set_cmdline(&perf_env, argc, argv); |
b0ad8ea6 | 295 | status = p->fn(argc, argv); |
8a0a9c7e | 296 | perf_config__exit(); |
f3a1f0ea | 297 | exit_browser(status); |
aa36ddd7 | 298 | perf_env__exit(&perf_env); |
84c86ca1 | 299 | bpf__clear(); |
f3a1f0ea | 300 | |
07800601 IM |
301 | if (status) |
302 | return status & 0xff; | |
303 | ||
304 | /* Somebody closed stdout? */ | |
305 | if (fstat(fileno(stdout), &st)) | |
306 | return 0; | |
307 | /* Ignore write errors for pipes and sockets.. */ | |
308 | if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) | |
309 | return 0; | |
310 | ||
2a16bf8c | 311 | status = 1; |
07800601 | 312 | /* Check for ENOSPC and EIO errors.. */ |
2a16bf8c | 313 | if (fflush(stdout)) { |
b2348e1d | 314 | fprintf(stderr, "write failure on standard output: %s", |
c8b5f2c9 | 315 | str_error_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c ACM |
316 | goto out; |
317 | } | |
318 | if (ferror(stdout)) { | |
319 | fprintf(stderr, "unknown write failure on standard output"); | |
320 | goto out; | |
321 | } | |
322 | if (fclose(stdout)) { | |
b2348e1d | 323 | fprintf(stderr, "close failed on standard output: %s", |
c8b5f2c9 | 324 | str_error_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c ACM |
325 | goto out; |
326 | } | |
327 | status = 0; | |
328 | out: | |
329 | return status; | |
07800601 IM |
330 | } |
331 | ||
332 | static void handle_internal_command(int argc, const char **argv) | |
333 | { | |
334 | const char *cmd = argv[0]; | |
f37a291c | 335 | unsigned int i; |
07800601 IM |
336 | |
337 | /* Turn "perf cmd --help" into "perf help cmd" */ | |
338 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
339 | argv[1] = argv[0]; | |
340 | argv[0] = cmd = "help"; | |
341 | } | |
342 | ||
343 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
344 | struct cmd_struct *p = commands+i; | |
345 | if (strcmp(p->cmd, cmd)) | |
346 | continue; | |
347 | exit(run_builtin(p, argc, argv)); | |
348 | } | |
349 | } | |
350 | ||
351 | static void execv_dashed_external(const char **argv) | |
352 | { | |
5104ffb2 | 353 | char *cmd; |
07800601 IM |
354 | const char *tmp; |
355 | int status; | |
356 | ||
5104ffb2 ACM |
357 | if (asprintf(&cmd, "perf-%s", argv[0]) < 0) |
358 | goto do_die; | |
07800601 IM |
359 | |
360 | /* | |
361 | * argv[0] must be the perf command, but the argv array | |
362 | * belongs to the caller, and may be reused in | |
363 | * subsequent loop iterations. Save argv[0] and | |
364 | * restore it on error. | |
365 | */ | |
366 | tmp = argv[0]; | |
5104ffb2 | 367 | argv[0] = cmd; |
07800601 IM |
368 | |
369 | /* | |
370 | * if we fail because the command is not found, it is | |
371 | * OK to return. Otherwise, we just pass along the status code. | |
372 | */ | |
373 | status = run_command_v_opt(argv, 0); | |
374 | if (status != -ERR_RUN_COMMAND_EXEC) { | |
5104ffb2 ACM |
375 | if (IS_RUN_COMMAND_ERR(status)) { |
376 | do_die: | |
42774806 ACM |
377 | pr_err("FATAL: unable to run '%s'", argv[0]); |
378 | status = -128; | |
5104ffb2 | 379 | } |
07800601 IM |
380 | exit(-status); |
381 | } | |
382 | errno = ENOENT; /* as if we called execvp */ | |
383 | ||
384 | argv[0] = tmp; | |
5104ffb2 | 385 | zfree(&cmd); |
07800601 IM |
386 | } |
387 | ||
388 | static int run_argv(int *argcp, const char ***argv) | |
389 | { | |
c6867701 ACM |
390 | /* See if it's an internal command */ |
391 | handle_internal_command(*argcp, *argv); | |
07800601 | 392 | |
c6867701 ACM |
393 | /* .. then try the external ones */ |
394 | execv_dashed_external(*argv); | |
395 | return 0; | |
07800601 IM |
396 | } |
397 | ||
3af6e338 ACM |
398 | static void pthread__block_sigwinch(void) |
399 | { | |
400 | sigset_t set; | |
401 | ||
402 | sigemptyset(&set); | |
403 | sigaddset(&set, SIGWINCH); | |
404 | pthread_sigmask(SIG_BLOCK, &set, NULL); | |
405 | } | |
406 | ||
407 | void pthread__unblock_sigwinch(void) | |
408 | { | |
409 | sigset_t set; | |
410 | ||
411 | sigemptyset(&set); | |
412 | sigaddset(&set, SIGWINCH); | |
413 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
414 | } | |
415 | ||
9a3dc28b ACM |
416 | #ifdef _SC_LEVEL1_DCACHE_LINESIZE |
417 | #define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE) | |
418 | #else | |
419 | static void cache_line_size(int *cacheline_sizep) | |
420 | { | |
421 | if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep)) | |
8811e8ea | 422 | pr_debug("cannot determine cache line size"); |
9a3dc28b ACM |
423 | } |
424 | #endif | |
425 | ||
07800601 IM |
426 | int main(int argc, const char **argv) |
427 | { | |
ecc4c561 | 428 | int err; |
07800601 | 429 | const char *cmd; |
b2348e1d | 430 | char sbuf[STRERR_BUFSIZE]; |
4cb93446 | 431 | int value; |
07800601 | 432 | |
096d3558 JP |
433 | /* libsubcmd init */ |
434 | exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT); | |
435 | pager_init(PERF_PAGER_ENVIRONMENT); | |
436 | ||
918512b4 | 437 | /* The page_size is placed in util object. */ |
0c1fe6b2 | 438 | page_size = sysconf(_SC_PAGE_SIZE); |
9a3dc28b | 439 | cache_line_size(&cacheline_size); |
0c1fe6b2 | 440 | |
4cb93446 ACM |
441 | if (sysctl__read_int("kernel/perf_event_max_stack", &value) == 0) |
442 | sysctl_perf_event_max_stack = value; | |
443 | ||
a29d5c9b ACM |
444 | if (sysctl__read_int("kernel/perf_event_max_contexts_per_stack", &value) == 0) |
445 | sysctl_perf_event_max_contexts_per_stack = value; | |
446 | ||
46113a54 | 447 | cmd = extract_argv0_path(argv[0]); |
07800601 IM |
448 | if (!cmd) |
449 | cmd = "perf-help"; | |
65d4b265 | 450 | |
14cbfbeb NK |
451 | srandom(time(NULL)); |
452 | ||
8a0a9c7e | 453 | perf_config__init(); |
ecc4c561 ACM |
454 | err = perf_config(perf_default_config, NULL); |
455 | if (err) | |
456 | return err; | |
58cb9d65 | 457 | set_buildid_dir(NULL); |
b8cbb349 | 458 | |
65d4b265 JO |
459 | /* get debugfs/tracefs mount point from /proc/mounts */ |
460 | tracing_path_mount(); | |
461 | ||
07800601 IM |
462 | /* |
463 | * "perf-xxxx" is the same as "perf xxxx", but we obviously: | |
464 | * | |
465 | * - cannot take flags in between the "perf" and the "xxxx". | |
466 | * - cannot execute it externally (since it would just do | |
467 | * the same thing over again) | |
468 | * | |
469 | * So we just directly call the internal command handler, and | |
470 | * die if that one cannot handle it. | |
471 | */ | |
472 | if (!prefixcmp(cmd, "perf-")) { | |
266dfb0b | 473 | cmd += 5; |
07800601 IM |
474 | argv[0] = cmd; |
475 | handle_internal_command(argc, argv); | |
2a16bf8c ACM |
476 | fprintf(stderr, "cannot handle %s internally", cmd); |
477 | goto out; | |
07800601 | 478 | } |
b52bc234 | 479 | if (!prefixcmp(cmd, "trace")) { |
1b572622 | 480 | #ifdef HAVE_LIBAUDIT_SUPPORT |
b52bc234 ACM |
481 | setup_path(); |
482 | argv[0] = "trace"; | |
b0ad8ea6 | 483 | return cmd_trace(argc, argv); |
1b572622 ACM |
484 | #else |
485 | fprintf(stderr, | |
486 | "trace command not available: missing audit-libs devel package at build time.\n"); | |
487 | goto out; | |
b52bc234 | 488 | #endif |
1b572622 | 489 | } |
07800601 IM |
490 | /* Look for flags.. */ |
491 | argv++; | |
492 | argc--; | |
493 | handle_options(&argv, &argc, NULL); | |
494 | commit_pager_choice(); | |
45de34bb | 495 | |
07800601 IM |
496 | if (argc > 0) { |
497 | if (!prefixcmp(argv[0], "--")) | |
498 | argv[0] += 2; | |
499 | } else { | |
500 | /* The user didn't specify a command; give them help */ | |
502fc5c7 | 501 | printf("\n usage: %s\n\n", perf_usage_string); |
07800601 | 502 | list_common_cmds_help(); |
502fc5c7 | 503 | printf("\n %s\n\n", perf_more_info_string); |
2a16bf8c | 504 | goto out; |
07800601 IM |
505 | } |
506 | cmd = argv[0]; | |
507 | ||
52502bf2 JO |
508 | test_attr__init(); |
509 | ||
07800601 IM |
510 | /* |
511 | * We use PATH to find perf commands, but we prepend some higher | |
659431fc | 512 | * precedence paths: the "--exec-path" option, the PERF_EXEC_PATH |
07800601 IM |
513 | * environment, and the $(perfexecdir) from the Makefile at build |
514 | * time. | |
515 | */ | |
516 | setup_path(); | |
3af6e338 ACM |
517 | /* |
518 | * Block SIGWINCH notifications so that the thread that wants it can | |
519 | * unblock and get syscalls like select interrupted instead of waiting | |
520 | * forever while the signal goes to some other non interested thread. | |
521 | */ | |
522 | pthread__block_sigwinch(); | |
07800601 | 523 | |
dd629cc0 JO |
524 | perf_debug_setup(); |
525 | ||
07800601 | 526 | while (1) { |
4c574159 | 527 | static int done_help; |
c6867701 ACM |
528 | |
529 | run_argv(&argc, &argv); | |
8035e428 | 530 | |
07800601 IM |
531 | if (errno != ENOENT) |
532 | break; | |
8035e428 | 533 | |
07800601 IM |
534 | if (!done_help) { |
535 | cmd = argv[0] = help_unknown_cmd(cmd); | |
536 | done_help = 1; | |
537 | } else | |
538 | break; | |
539 | } | |
540 | ||
541 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
c8b5f2c9 | 542 | cmd, str_error_r(errno, sbuf, sizeof(sbuf))); |
2a16bf8c | 543 | out: |
07800601 IM |
544 | return 1; |
545 | } |