Commit | Line | Data |
---|---|---|
826d496d MD |
1 | /* |
2 | * Copyright (c) 2011 David Goulet <david.goulet@polymtl.ca> | |
fac6795d DG |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify | |
d14d33bf AM |
5 | * it under the terms of the GNU General Public License, version 2 only, |
6 | * as published by the Free Software Foundation. | |
fac6795d DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along | |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
fac6795d | 19 | #include <getopt.h> |
f3ed775e | 20 | #include <signal.h> |
fac6795d DG |
21 | #include <stdio.h> |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
8db8d1dc DG |
24 | #include <sys/types.h> |
25 | #include <sys/wait.h> | |
fac6795d | 26 | #include <unistd.h> |
3bd1e081 | 27 | #include <config.h> |
730389d9 | 28 | #include <ctype.h> |
fac6795d | 29 | |
5b97ec60 | 30 | #include <lttng/lttng.h> |
db758600 | 31 | #include <common/error.h> |
fac6795d | 32 | |
c399183f | 33 | #include "command.h" |
fac6795d DG |
34 | |
35 | /* Variables */ | |
36 | static char *progname; | |
f3ed775e DG |
37 | static int opt_no_sessiond; |
38 | static char *opt_sessiond_path; | |
8db8d1dc | 39 | static pid_t sessiond_pid; |
5a532b68 | 40 | static volatile int recv_child_signal; |
f3ed775e | 41 | |
ec31ed29 DG |
42 | char *opt_relayd_path; |
43 | ||
f3ed775e | 44 | enum { |
ec31ed29 | 45 | OPT_RELAYD_PATH, |
f3ed775e | 46 | OPT_SESSION_PATH, |
865abf65 SM |
47 | OPT_DUMP_OPTIONS, |
48 | OPT_DUMP_COMMANDS, | |
f3ed775e DG |
49 | }; |
50 | ||
51 | /* Getopt options. No first level command. */ | |
52 | static struct option long_options[] = { | |
70318c38 | 53 | {"version", 0, NULL, 'V'}, |
f3ed775e DG |
54 | {"help", 0, NULL, 'h'}, |
55 | {"group", 1, NULL, 'g'}, | |
56 | {"verbose", 0, NULL, 'v'}, | |
57 | {"quiet", 0, NULL, 'q'}, | |
8490ae7b | 58 | {"no-sessiond", 0, NULL, 'n'}, |
f3ed775e | 59 | {"sessiond-path", 1, NULL, OPT_SESSION_PATH}, |
ec31ed29 | 60 | {"relayd-path", 1, NULL, OPT_RELAYD_PATH}, |
865abf65 SM |
61 | {"list-options", 0, NULL, OPT_DUMP_OPTIONS}, |
62 | {"list-commands", 0, NULL, OPT_DUMP_COMMANDS}, | |
f3ed775e DG |
63 | {NULL, 0, NULL, 0} |
64 | }; | |
65 | ||
66 | /* First level command */ | |
67 | static struct cmd_struct commands[] = { | |
68 | { "list", cmd_list}, | |
69 | { "create", cmd_create}, | |
70 | { "destroy", cmd_destroy}, | |
f3ed775e DG |
71 | { "start", cmd_start}, |
72 | { "stop", cmd_stop}, | |
73 | { "enable-event", cmd_enable_events}, | |
e953ef25 | 74 | { "disable-event", cmd_disable_events}, |
d36b8583 | 75 | { "enable-channel", cmd_enable_channels}, |
26cc6b4e | 76 | { "disable-channel", cmd_disable_channels}, |
d65106b1 | 77 | { "add-context", cmd_add_context}, |
3087ef18 | 78 | { "set-session", cmd_set_session}, |
eb9cb8b7 | 79 | { "version", cmd_version}, |
d0254c7c | 80 | { "calibrate", cmd_calibrate}, |
0c95f5b2 | 81 | { "view", cmd_view}, |
57f272ed | 82 | { "snapshot", cmd_snapshot}, |
9c6bda17 DG |
83 | { "enable-consumer", cmd_enable_consumer}, /* OBSOLETE */ |
84 | { "disable-consumer", cmd_disable_consumer}, /* OBSOLETE */ | |
f3ed775e DG |
85 | { NULL, NULL} /* Array closure */ |
86 | }; | |
87 | ||
88 | static void usage(FILE *ofp) | |
8c0faa1d | 89 | { |
c6d4a597 | 90 | fprintf(ofp, "LTTng Trace Control " VERSION" - " VERSION_NAME"\n\n"); |
32a6298d | 91 | fprintf(ofp, "usage: lttng [OPTIONS] <COMMAND> [<ARGS>]\n"); |
f3ed775e DG |
92 | fprintf(ofp, "\n"); |
93 | fprintf(ofp, "Options:\n"); | |
70318c38 | 94 | fprintf(ofp, " -V, --version Show version\n"); |
99bab54f TD |
95 | fprintf(ofp, " -h, --help Show this help\n"); |
96 | fprintf(ofp, " --list-options Simple listing of lttng options\n"); | |
97 | fprintf(ofp, " --list-commands Simple listing of lttng commands\n"); | |
98 | fprintf(ofp, " -v, --verbose Increase verbosity\n"); | |
99 | fprintf(ofp, " -q, --quiet Quiet mode\n"); | |
100 | fprintf(ofp, " -g, --group NAME Unix tracing group name. (default: tracing)\n"); | |
101 | fprintf(ofp, " -n, --no-sessiond Don't spawn a session daemon\n"); | |
102 | fprintf(ofp, " --sessiond-path PATH Session daemon full path\n"); | |
ec31ed29 | 103 | fprintf(ofp, " --relayd-path PATH Relayd daemon full path\n"); |
f3ed775e DG |
104 | fprintf(ofp, "\n"); |
105 | fprintf(ofp, "Commands:\n"); | |
00e2e675 DG |
106 | fprintf(ofp, " add-context Add context to event and/or channel\n"); |
107 | fprintf(ofp, " calibrate Quantify LTTng overhead\n"); | |
108 | fprintf(ofp, " create Create tracing session\n"); | |
109 | fprintf(ofp, " destroy Tear down tracing session\n"); | |
110 | fprintf(ofp, " enable-channel Enable tracing channel\n"); | |
111 | fprintf(ofp, " enable-event Enable tracing event\n"); | |
112 | fprintf(ofp, " disable-channel Disable tracing channel\n"); | |
113 | fprintf(ofp, " disable-event Disable tracing event\n"); | |
00e2e675 DG |
114 | fprintf(ofp, " list List possible tracing options\n"); |
115 | fprintf(ofp, " set-session Set current session name\n"); | |
57f272ed | 116 | fprintf(ofp, " snapshot Snapshot buffers of current session name\n"); |
00e2e675 DG |
117 | fprintf(ofp, " start Start tracing\n"); |
118 | fprintf(ofp, " stop Stop tracing\n"); | |
119 | fprintf(ofp, " version Show version information\n"); | |
120 | fprintf(ofp, " view Start trace viewer\n"); | |
f3ed775e | 121 | fprintf(ofp, "\n"); |
99bab54f TD |
122 | fprintf(ofp, "Each command also has its own -h, --help option.\n"); |
123 | fprintf(ofp, "\n"); | |
f3ed775e DG |
124 | fprintf(ofp, "Please see the lttng(1) man page for full documentation.\n"); |
125 | fprintf(ofp, "See http://lttng.org for updates, bug reports and news.\n"); | |
8c0faa1d DG |
126 | } |
127 | ||
70318c38 SS |
128 | static void version(FILE *ofp) |
129 | { | |
130 | fprintf(ofp, "%s (LTTng Trace Control) " VERSION" - " VERSION_NAME"\n", | |
131 | progname); | |
132 | } | |
133 | ||
865abf65 SM |
134 | /* |
135 | * list_options | |
136 | * | |
137 | * List options line by line. This is mostly for bash auto completion and to | |
138 | * avoid difficult parsing. | |
139 | */ | |
140 | static void list_options(FILE *ofp) | |
141 | { | |
142 | int i = 0; | |
143 | struct option *option = NULL; | |
144 | ||
145 | option = &long_options[i]; | |
146 | while (option->name != NULL) { | |
147 | fprintf(ofp, "--%s\n", option->name); | |
148 | ||
149 | if (isprint(option->val)) { | |
150 | fprintf(ofp, "-%c\n", option->val); | |
151 | } | |
152 | ||
153 | i++; | |
154 | option = &long_options[i]; | |
155 | } | |
156 | } | |
157 | ||
7442b2ba | 158 | /* |
f3ed775e | 159 | * clean_exit |
96243366 | 160 | */ |
f3ed775e | 161 | static void clean_exit(int code) |
96243366 | 162 | { |
f3ed775e DG |
163 | DBG("Clean exit"); |
164 | exit(code); | |
894be886 | 165 | } |
96243366 | 166 | |
894be886 | 167 | /* |
f3ed775e | 168 | * sighandler |
2ef84c95 | 169 | * |
f3ed775e | 170 | * Signal handler for the daemon |
2ef84c95 | 171 | */ |
f3ed775e | 172 | static void sighandler(int sig) |
2ef84c95 | 173 | { |
8db8d1dc DG |
174 | int status; |
175 | ||
f3ed775e DG |
176 | switch (sig) { |
177 | case SIGTERM: | |
99bab54f | 178 | DBG("SIGTERM caught"); |
f3ed775e DG |
179 | clean_exit(EXIT_FAILURE); |
180 | break; | |
181 | case SIGCHLD: | |
99bab54f | 182 | DBG("SIGCHLD caught"); |
8db8d1dc | 183 | waitpid(sessiond_pid, &status, 0); |
5a532b68 | 184 | recv_child_signal = 1; |
8db8d1dc DG |
185 | /* Indicate that the session daemon died */ |
186 | sessiond_pid = 0; | |
187 | ERR("Session daemon died (exit status %d)", WEXITSTATUS(status)); | |
188 | break; | |
189 | case SIGUSR1: | |
190 | /* Notify is done */ | |
5a532b68 | 191 | recv_child_signal = 1; |
99bab54f | 192 | DBG("SIGUSR1 caught"); |
f3ed775e DG |
193 | break; |
194 | default: | |
99bab54f | 195 | DBG("Unknown signal %d caught", sig); |
f3ed775e | 196 | break; |
2ef84c95 DG |
197 | } |
198 | ||
f3ed775e | 199 | return; |
2ef84c95 DG |
200 | } |
201 | ||
202 | /* | |
f3ed775e | 203 | * set_signal_handler |
894be886 | 204 | * |
f3ed775e | 205 | * Setup signal handler for SIGCHLD and SIGTERM. |
894be886 | 206 | */ |
f3ed775e | 207 | static int set_signal_handler(void) |
894be886 | 208 | { |
f3ed775e DG |
209 | int ret = 0; |
210 | struct sigaction sa; | |
211 | sigset_t sigset; | |
33a2b854 | 212 | |
f3ed775e DG |
213 | if ((ret = sigemptyset(&sigset)) < 0) { |
214 | perror("sigemptyset"); | |
33a2b854 DG |
215 | goto end; |
216 | } | |
217 | ||
f3ed775e DG |
218 | sa.sa_handler = sighandler; |
219 | sa.sa_mask = sigset; | |
220 | sa.sa_flags = 0; | |
8db8d1dc | 221 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
f3ed775e | 222 | perror("sigaction"); |
96243366 DG |
223 | goto end; |
224 | } | |
225 | ||
f3ed775e DG |
226 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
227 | perror("sigaction"); | |
228 | goto end; | |
894be886 DG |
229 | } |
230 | ||
8db8d1dc DG |
231 | if ((ret = sigaction(SIGCHLD, &sa, NULL)) < 0) { |
232 | perror("sigaction"); | |
233 | goto end; | |
234 | } | |
235 | ||
96243366 | 236 | end: |
57167058 DG |
237 | return ret; |
238 | } | |
239 | ||
fac6795d | 240 | /* |
f3ed775e | 241 | * handle_command |
fac6795d | 242 | * |
f3ed775e DG |
243 | * Handle the full argv list of a first level command. Will find the command |
244 | * in the global commands array and call the function callback associated. | |
1c9f7941 | 245 | * |
f3ed775e DG |
246 | * If command not found, return -1 |
247 | * else, return function command error code. | |
1c9f7941 | 248 | */ |
f3ed775e | 249 | static int handle_command(int argc, char **argv) |
1c9f7941 | 250 | { |
f3ed775e DG |
251 | int i = 0, ret; |
252 | struct cmd_struct *cmd; | |
1c9f7941 | 253 | |
f3ed775e DG |
254 | if (*argv == NULL) { |
255 | ret = CMD_SUCCESS; | |
47b74d63 | 256 | goto end; |
1c9f7941 DG |
257 | } |
258 | ||
f3ed775e DG |
259 | cmd = &commands[i]; |
260 | while (cmd->func != NULL) { | |
261 | /* Find command */ | |
262 | if (strcmp(argv[0], cmd->name) == 0) { | |
263 | ret = cmd->func(argc, (const char**) argv); | |
f3ed775e | 264 | goto end; |
894be886 | 265 | } |
f3ed775e DG |
266 | i++; |
267 | cmd = &commands[i]; | |
894be886 DG |
268 | } |
269 | ||
f3ed775e | 270 | /* Command not found */ |
4ce78777 | 271 | ret = CMD_UNDEFINED; |
894be886 DG |
272 | |
273 | end: | |
f3ed775e | 274 | return ret; |
8548ff30 DG |
275 | } |
276 | ||
5b8719f5 DG |
277 | /* |
278 | * spawn_sessiond | |
279 | * | |
280 | * Spawn a session daemon by forking and execv. | |
281 | */ | |
282 | static int spawn_sessiond(char *pathname) | |
283 | { | |
284 | int ret = 0; | |
285 | pid_t pid; | |
286 | ||
f3ed775e | 287 | MSG("Spawning a session daemon"); |
5a532b68 | 288 | recv_child_signal = 0; |
5b8719f5 DG |
289 | pid = fork(); |
290 | if (pid == 0) { | |
5e16da05 MD |
291 | /* |
292 | * Spawn session daemon and tell | |
5b8719f5 DG |
293 | * it to signal us when ready. |
294 | */ | |
32258573 | 295 | execlp(pathname, "lttng-sessiond", "--sig-parent", "--quiet", NULL); |
5e16da05 MD |
296 | /* execlp only returns if error happened */ |
297 | if (errno == ENOENT) { | |
298 | ERR("No session daemon found. Use --sessiond-path."); | |
299 | } else { | |
300 | perror("execlp"); | |
5b8719f5 | 301 | } |
5a532b68 | 302 | kill(getppid(), SIGTERM); /* wake parent */ |
5e16da05 | 303 | exit(EXIT_FAILURE); |
5b8719f5 | 304 | } else if (pid > 0) { |
8db8d1dc | 305 | sessiond_pid = pid; |
5a532b68 | 306 | /* |
af87c45a DG |
307 | * Wait for lttng-sessiond to start. We need to use a flag to check if |
308 | * the signal has been sent to us, because the child can be scheduled | |
309 | * before the parent, and thus send the signal before this check. In | |
310 | * the signal handler, we set the recv_child_signal flag, so anytime we | |
311 | * check it after the fork is fine. Note that sleep() is interrupted | |
312 | * before the 1 second delay as soon as the signal is received, so it | |
313 | * will not cause visible delay for the user. | |
5a532b68 MD |
314 | */ |
315 | while (!recv_child_signal) { | |
316 | sleep(1); | |
317 | } | |
af87c45a DG |
318 | /* |
319 | * The signal handler will nullify sessiond_pid on SIGCHLD | |
320 | */ | |
8db8d1dc DG |
321 | if (!sessiond_pid) { |
322 | exit(EXIT_FAILURE); | |
323 | } | |
5b8719f5 DG |
324 | goto end; |
325 | } else { | |
326 | perror("fork"); | |
327 | ret = -1; | |
328 | goto end; | |
329 | } | |
330 | ||
331 | end: | |
332 | return ret; | |
333 | } | |
334 | ||
fac6795d | 335 | /* |
f3ed775e | 336 | * check_sessiond |
fac6795d DG |
337 | * |
338 | * Check if the session daemon is available using | |
5b8719f5 DG |
339 | * the liblttngctl API for the check. If not, try to |
340 | * spawn a daemon. | |
fac6795d | 341 | */ |
f3ed775e | 342 | static int check_sessiond(void) |
fac6795d DG |
343 | { |
344 | int ret; | |
b8ec3da8 | 345 | char *pathname = NULL; |
fac6795d | 346 | |
947308c4 DG |
347 | ret = lttng_session_daemon_alive(); |
348 | if (ret == 0) { /* not alive */ | |
5b8719f5 | 349 | /* Try command line option path */ |
b8ec3da8 SM |
350 | pathname = opt_sessiond_path; |
351 | ||
352 | /* Try LTTNG_SESSIOND_PATH env variable */ | |
353 | if (pathname == NULL) { | |
bbccc3d2 | 354 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); |
5b8719f5 DG |
355 | } |
356 | ||
b8ec3da8 | 357 | /* Try with configured path */ |
5b8719f5 | 358 | if (pathname == NULL) { |
b8ec3da8 SM |
359 | if (CONFIG_SESSIOND_BIN[0] != '\0') { |
360 | pathname = CONFIG_SESSIOND_BIN; | |
5b8719f5 | 361 | } |
b8ec3da8 SM |
362 | } |
363 | ||
364 | /* Let's rock and roll while trying the default path */ | |
365 | if (pathname == NULL) { | |
366 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; | |
367 | } | |
368 | ||
369 | DBG("Session daemon at: %s", pathname); | |
370 | ||
371 | /* Check existence and permissions */ | |
372 | ret = access(pathname, F_OK | X_OK); | |
373 | if (ret < 0) { | |
374 | ERR("No such file or access denied: %s", pathname); | |
375 | goto end; | |
5b8719f5 DG |
376 | } |
377 | ||
378 | ret = spawn_sessiond(pathname); | |
5b8719f5 | 379 | if (ret < 0) { |
3183dbb0 | 380 | ERR("Problem occurred when starting %s", pathname); |
5b8719f5 | 381 | } |
c2a79a67 | 382 | } |
5b8719f5 | 383 | end: |
fac6795d DG |
384 | return ret; |
385 | } | |
386 | ||
bcfa8a05 | 387 | /* |
679b4943 SM |
388 | * Check args for specific options that *must* not trigger a session daemon |
389 | * execution. | |
390 | * | |
391 | * Return 1 if match else 0. | |
bcfa8a05 | 392 | */ |
679b4943 | 393 | static int check_args_no_sessiond(int argc, char **argv) |
bcfa8a05 DG |
394 | { |
395 | int i; | |
396 | ||
397 | for (i = 0; i < argc; i++) { | |
ba2926ef MD |
398 | if ((strncmp(argv[i], "-h", sizeof("-h")) == 0) || |
399 | strncmp(argv[i], "--h", sizeof("--h")) == 0 || | |
3183dbb0 | 400 | strncmp(argv[i], "--list-options", sizeof("--list-options")) == 0 || |
4747a49b | 401 | strncmp(argv[i], "--list-commands", sizeof("--list-commands")) == 0 || |
0c95f5b2 DG |
402 | strncmp(argv[i], "version", sizeof("version")) == 0 || |
403 | strncmp(argv[i], "view", sizeof("view")) == 0) { | |
bcfa8a05 DG |
404 | return 1; |
405 | } | |
406 | } | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
5b8719f5 | 411 | /* |
3183dbb0 | 412 | * Parse command line arguments. |
5b8719f5 | 413 | * |
3183dbb0 | 414 | * Return 0 if OK, else -1 |
5b8719f5 | 415 | */ |
f3ed775e | 416 | static int parse_args(int argc, char **argv) |
5b8719f5 | 417 | { |
f3ed775e | 418 | int opt, ret; |
5b8719f5 | 419 | |
f3ed775e DG |
420 | if (argc < 2) { |
421 | usage(stderr); | |
422 | clean_exit(EXIT_FAILURE); | |
5b8719f5 DG |
423 | } |
424 | ||
70318c38 | 425 | while ((opt = getopt_long(argc, argv, "+Vhnvqg:", long_options, NULL)) != -1) { |
f3ed775e | 426 | switch (opt) { |
70318c38 SS |
427 | case 'V': |
428 | version(stdout); | |
429 | ret = 0; | |
430 | goto end; | |
f3ed775e | 431 | case 'h': |
3183dbb0 | 432 | usage(stdout); |
ae856491 | 433 | ret = 0; |
3183dbb0 | 434 | goto end; |
f3ed775e | 435 | case 'v': |
97e19046 | 436 | lttng_opt_verbose += 1; |
f3ed775e DG |
437 | break; |
438 | case 'q': | |
97e19046 | 439 | lttng_opt_quiet = 1; |
f3ed775e DG |
440 | break; |
441 | case 'g': | |
442 | lttng_set_tracing_group(optarg); | |
443 | break; | |
8490ae7b | 444 | case 'n': |
f3ed775e DG |
445 | opt_no_sessiond = 1; |
446 | break; | |
447 | case OPT_SESSION_PATH: | |
448 | opt_sessiond_path = strdup(optarg); | |
449 | break; | |
ec31ed29 DG |
450 | case OPT_RELAYD_PATH: |
451 | opt_relayd_path = strdup(optarg); | |
452 | break; | |
865abf65 SM |
453 | case OPT_DUMP_OPTIONS: |
454 | list_options(stdout); | |
455 | ret = 0; | |
3183dbb0 | 456 | goto end; |
865abf65 | 457 | case OPT_DUMP_COMMANDS: |
3c9bd23c | 458 | list_commands(commands, stdout); |
865abf65 | 459 | ret = 0; |
3183dbb0 | 460 | goto end; |
f3ed775e DG |
461 | default: |
462 | usage(stderr); | |
ae856491 | 463 | ret = 1; |
f3ed775e DG |
464 | goto error; |
465 | } | |
5b8719f5 | 466 | } |
fac6795d | 467 | |
f3ed775e | 468 | /* If both options are specified, quiet wins */ |
97e19046 DG |
469 | if (lttng_opt_verbose && lttng_opt_quiet) { |
470 | lttng_opt_verbose = 0; | |
5b8719f5 DG |
471 | } |
472 | ||
f3ed775e | 473 | /* Spawn session daemon if needed */ |
679b4943 | 474 | if (opt_no_sessiond == 0 && check_args_no_sessiond(argc, argv) == 0 && |
bcfa8a05 | 475 | (check_sessiond() < 0)) { |
8005f29a | 476 | ret = 1; |
f3ed775e | 477 | goto error; |
5b8719f5 DG |
478 | } |
479 | ||
f3ed775e DG |
480 | /* No leftovers, print usage and quit */ |
481 | if ((argc - optind) == 0) { | |
482 | usage(stderr); | |
8005f29a | 483 | ret = 1; |
f3ed775e DG |
484 | goto error; |
485 | } | |
7442b2ba | 486 | |
f3ed775e DG |
487 | /* |
488 | * Handle leftovers which is a first level command with the trailing | |
489 | * options. | |
490 | */ | |
491 | ret = handle_command(argc - optind, argv + optind); | |
ae856491 DG |
492 | switch (ret) { |
493 | case CMD_WARNING: | |
494 | WARN("Some command(s) went wrong"); | |
495 | break; | |
496 | case CMD_ERROR: | |
497 | ERR("Command error"); | |
498 | break; | |
499 | case CMD_UNDEFINED: | |
500 | ERR("Undefined command"); | |
501 | break; | |
502 | case CMD_FATAL: | |
503 | ERR("Fatal error"); | |
504 | break; | |
4ce78777 DG |
505 | case CMD_UNSUPPORTED: |
506 | ERR("Unsupported command"); | |
507 | break; | |
ae856491 DG |
508 | case -1: |
509 | usage(stderr); | |
510 | ret = 1; | |
511 | break; | |
512 | case 0: | |
513 | break; | |
514 | default: | |
42224349 DG |
515 | if (ret < 0) { |
516 | ret = -ret; | |
517 | } | |
ae856491 | 518 | break; |
96243366 DG |
519 | } |
520 | ||
3183dbb0 | 521 | end: |
f3ed775e | 522 | error: |
ae856491 | 523 | return ret; |
fac6795d DG |
524 | } |
525 | ||
f3ed775e | 526 | |
fac6795d | 527 | /* |
5b8719f5 | 528 | * main |
fac6795d DG |
529 | */ |
530 | int main(int argc, char *argv[]) | |
531 | { | |
532 | int ret; | |
cbbb813a | 533 | char *user; |
fac6795d DG |
534 | |
535 | progname = argv[0] ? argv[0] : "lttng"; | |
536 | ||
99bab54f | 537 | /* For Mathieu Desnoyers a.k.a. Dr. Tracing */ |
cbbb813a DG |
538 | user = getenv("USER"); |
539 | if (user != NULL && ((strncmp(progname, "drtrace", 7) == 0 || | |
540 | strncmp("compudj", user, 7) == 0))) { | |
4666e71c | 541 | MSG("%c[%d;%dmWelcome back Dr Tracing!%c[%dm\n", 27,1,33,27,0); |
fac6795d | 542 | } |
cbbb813a | 543 | /* Thanks Mathieu */ |
fac6795d | 544 | |
5b8719f5 DG |
545 | ret = set_signal_handler(); |
546 | if (ret < 0) { | |
87378cf5 | 547 | clean_exit(ret); |
5b8719f5 DG |
548 | } |
549 | ||
f3ed775e | 550 | ret = parse_args(argc, argv); |
ae856491 DG |
551 | if (ret != 0) { |
552 | clean_exit(ret); | |
1fff1faa | 553 | } |
87378cf5 | 554 | |
fac6795d DG |
555 | return 0; |
556 | } |