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 DG |
41 | |
42 | enum { | |
f3ed775e | 43 | OPT_SESSION_PATH, |
865abf65 SM |
44 | OPT_DUMP_OPTIONS, |
45 | OPT_DUMP_COMMANDS, | |
f3ed775e DG |
46 | }; |
47 | ||
48 | /* Getopt options. No first level command. */ | |
49 | static struct option long_options[] = { | |
70318c38 | 50 | {"version", 0, NULL, 'V'}, |
f3ed775e DG |
51 | {"help", 0, NULL, 'h'}, |
52 | {"group", 1, NULL, 'g'}, | |
53 | {"verbose", 0, NULL, 'v'}, | |
54 | {"quiet", 0, NULL, 'q'}, | |
8490ae7b | 55 | {"no-sessiond", 0, NULL, 'n'}, |
f3ed775e | 56 | {"sessiond-path", 1, NULL, OPT_SESSION_PATH}, |
865abf65 SM |
57 | {"list-options", 0, NULL, OPT_DUMP_OPTIONS}, |
58 | {"list-commands", 0, NULL, OPT_DUMP_COMMANDS}, | |
f3ed775e DG |
59 | {NULL, 0, NULL, 0} |
60 | }; | |
61 | ||
62 | /* First level command */ | |
63 | static struct cmd_struct commands[] = { | |
64 | { "list", cmd_list}, | |
65 | { "create", cmd_create}, | |
66 | { "destroy", cmd_destroy}, | |
f3ed775e DG |
67 | { "start", cmd_start}, |
68 | { "stop", cmd_stop}, | |
69 | { "enable-event", cmd_enable_events}, | |
e953ef25 | 70 | { "disable-event", cmd_disable_events}, |
d36b8583 | 71 | { "enable-channel", cmd_enable_channels}, |
26cc6b4e | 72 | { "disable-channel", cmd_disable_channels}, |
d65106b1 | 73 | { "add-context", cmd_add_context}, |
3087ef18 | 74 | { "set-session", cmd_set_session}, |
eb9cb8b7 | 75 | { "version", cmd_version}, |
d0254c7c | 76 | { "calibrate", cmd_calibrate}, |
0c95f5b2 | 77 | { "view", cmd_view}, |
57f272ed | 78 | { "snapshot", cmd_snapshot}, |
9c6bda17 DG |
79 | { "enable-consumer", cmd_enable_consumer}, /* OBSOLETE */ |
80 | { "disable-consumer", cmd_disable_consumer}, /* OBSOLETE */ | |
f3ed775e DG |
81 | { NULL, NULL} /* Array closure */ |
82 | }; | |
83 | ||
84 | static void usage(FILE *ofp) | |
8c0faa1d | 85 | { |
c6d4a597 | 86 | fprintf(ofp, "LTTng Trace Control " VERSION" - " VERSION_NAME"\n\n"); |
32a6298d | 87 | fprintf(ofp, "usage: lttng [OPTIONS] <COMMAND> [<ARGS>]\n"); |
f3ed775e DG |
88 | fprintf(ofp, "\n"); |
89 | fprintf(ofp, "Options:\n"); | |
70318c38 | 90 | fprintf(ofp, " -V, --version Show version\n"); |
99bab54f TD |
91 | fprintf(ofp, " -h, --help Show this help\n"); |
92 | fprintf(ofp, " --list-options Simple listing of lttng options\n"); | |
93 | fprintf(ofp, " --list-commands Simple listing of lttng commands\n"); | |
94 | fprintf(ofp, " -v, --verbose Increase verbosity\n"); | |
95 | fprintf(ofp, " -q, --quiet Quiet mode\n"); | |
96 | fprintf(ofp, " -g, --group NAME Unix tracing group name. (default: tracing)\n"); | |
97 | fprintf(ofp, " -n, --no-sessiond Don't spawn a session daemon\n"); | |
98 | fprintf(ofp, " --sessiond-path PATH Session daemon full path\n"); | |
f3ed775e DG |
99 | fprintf(ofp, "\n"); |
100 | fprintf(ofp, "Commands:\n"); | |
00e2e675 DG |
101 | fprintf(ofp, " add-context Add context to event and/or channel\n"); |
102 | fprintf(ofp, " calibrate Quantify LTTng overhead\n"); | |
103 | fprintf(ofp, " create Create tracing session\n"); | |
104 | fprintf(ofp, " destroy Tear down tracing session\n"); | |
105 | fprintf(ofp, " enable-channel Enable tracing channel\n"); | |
106 | fprintf(ofp, " enable-event Enable tracing event\n"); | |
107 | fprintf(ofp, " disable-channel Disable tracing channel\n"); | |
108 | fprintf(ofp, " disable-event Disable tracing event\n"); | |
00e2e675 DG |
109 | fprintf(ofp, " list List possible tracing options\n"); |
110 | fprintf(ofp, " set-session Set current session name\n"); | |
57f272ed | 111 | fprintf(ofp, " snapshot Snapshot buffers of current session name\n"); |
00e2e675 DG |
112 | fprintf(ofp, " start Start tracing\n"); |
113 | fprintf(ofp, " stop Stop tracing\n"); | |
114 | fprintf(ofp, " version Show version information\n"); | |
115 | fprintf(ofp, " view Start trace viewer\n"); | |
f3ed775e | 116 | fprintf(ofp, "\n"); |
99bab54f TD |
117 | fprintf(ofp, "Each command also has its own -h, --help option.\n"); |
118 | fprintf(ofp, "\n"); | |
f3ed775e DG |
119 | fprintf(ofp, "Please see the lttng(1) man page for full documentation.\n"); |
120 | fprintf(ofp, "See http://lttng.org for updates, bug reports and news.\n"); | |
8c0faa1d DG |
121 | } |
122 | ||
70318c38 SS |
123 | static void version(FILE *ofp) |
124 | { | |
125 | fprintf(ofp, "%s (LTTng Trace Control) " VERSION" - " VERSION_NAME"\n", | |
126 | progname); | |
127 | } | |
128 | ||
865abf65 SM |
129 | /* |
130 | * list_options | |
131 | * | |
132 | * List options line by line. This is mostly for bash auto completion and to | |
133 | * avoid difficult parsing. | |
134 | */ | |
135 | static void list_options(FILE *ofp) | |
136 | { | |
137 | int i = 0; | |
138 | struct option *option = NULL; | |
139 | ||
140 | option = &long_options[i]; | |
141 | while (option->name != NULL) { | |
142 | fprintf(ofp, "--%s\n", option->name); | |
143 | ||
144 | if (isprint(option->val)) { | |
145 | fprintf(ofp, "-%c\n", option->val); | |
146 | } | |
147 | ||
148 | i++; | |
149 | option = &long_options[i]; | |
150 | } | |
151 | } | |
152 | ||
153 | /* | |
154 | * list_commands | |
155 | * | |
156 | * List commands line by line. This is mostly for bash auto completion and to | |
157 | * avoid difficult parsing. | |
158 | */ | |
159 | static void list_commands(FILE *ofp) | |
160 | { | |
161 | int i = 0; | |
162 | struct cmd_struct *cmd = NULL; | |
163 | ||
164 | cmd = &commands[i]; | |
165 | while (cmd->name != NULL) { | |
166 | fprintf(ofp, "%s\n", cmd->name); | |
167 | i++; | |
168 | cmd = &commands[i]; | |
169 | } | |
170 | } | |
171 | ||
7442b2ba | 172 | /* |
f3ed775e | 173 | * clean_exit |
96243366 | 174 | */ |
f3ed775e | 175 | static void clean_exit(int code) |
96243366 | 176 | { |
f3ed775e DG |
177 | DBG("Clean exit"); |
178 | exit(code); | |
894be886 | 179 | } |
96243366 | 180 | |
894be886 | 181 | /* |
f3ed775e | 182 | * sighandler |
2ef84c95 | 183 | * |
f3ed775e | 184 | * Signal handler for the daemon |
2ef84c95 | 185 | */ |
f3ed775e | 186 | static void sighandler(int sig) |
2ef84c95 | 187 | { |
8db8d1dc DG |
188 | int status; |
189 | ||
f3ed775e DG |
190 | switch (sig) { |
191 | case SIGTERM: | |
99bab54f | 192 | DBG("SIGTERM caught"); |
f3ed775e DG |
193 | clean_exit(EXIT_FAILURE); |
194 | break; | |
195 | case SIGCHLD: | |
99bab54f | 196 | DBG("SIGCHLD caught"); |
8db8d1dc | 197 | waitpid(sessiond_pid, &status, 0); |
5a532b68 | 198 | recv_child_signal = 1; |
8db8d1dc DG |
199 | /* Indicate that the session daemon died */ |
200 | sessiond_pid = 0; | |
201 | ERR("Session daemon died (exit status %d)", WEXITSTATUS(status)); | |
202 | break; | |
203 | case SIGUSR1: | |
204 | /* Notify is done */ | |
5a532b68 | 205 | recv_child_signal = 1; |
99bab54f | 206 | DBG("SIGUSR1 caught"); |
f3ed775e DG |
207 | break; |
208 | default: | |
99bab54f | 209 | DBG("Unknown signal %d caught", sig); |
f3ed775e | 210 | break; |
2ef84c95 DG |
211 | } |
212 | ||
f3ed775e | 213 | return; |
2ef84c95 DG |
214 | } |
215 | ||
216 | /* | |
f3ed775e | 217 | * set_signal_handler |
894be886 | 218 | * |
f3ed775e | 219 | * Setup signal handler for SIGCHLD and SIGTERM. |
894be886 | 220 | */ |
f3ed775e | 221 | static int set_signal_handler(void) |
894be886 | 222 | { |
f3ed775e DG |
223 | int ret = 0; |
224 | struct sigaction sa; | |
225 | sigset_t sigset; | |
33a2b854 | 226 | |
f3ed775e DG |
227 | if ((ret = sigemptyset(&sigset)) < 0) { |
228 | perror("sigemptyset"); | |
33a2b854 DG |
229 | goto end; |
230 | } | |
231 | ||
f3ed775e DG |
232 | sa.sa_handler = sighandler; |
233 | sa.sa_mask = sigset; | |
234 | sa.sa_flags = 0; | |
8db8d1dc | 235 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
f3ed775e | 236 | perror("sigaction"); |
96243366 DG |
237 | goto end; |
238 | } | |
239 | ||
f3ed775e DG |
240 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
241 | perror("sigaction"); | |
242 | goto end; | |
894be886 DG |
243 | } |
244 | ||
8db8d1dc DG |
245 | if ((ret = sigaction(SIGCHLD, &sa, NULL)) < 0) { |
246 | perror("sigaction"); | |
247 | goto end; | |
248 | } | |
249 | ||
96243366 | 250 | end: |
57167058 DG |
251 | return ret; |
252 | } | |
253 | ||
fac6795d | 254 | /* |
f3ed775e | 255 | * handle_command |
fac6795d | 256 | * |
f3ed775e DG |
257 | * Handle the full argv list of a first level command. Will find the command |
258 | * in the global commands array and call the function callback associated. | |
1c9f7941 | 259 | * |
f3ed775e DG |
260 | * If command not found, return -1 |
261 | * else, return function command error code. | |
1c9f7941 | 262 | */ |
f3ed775e | 263 | static int handle_command(int argc, char **argv) |
1c9f7941 | 264 | { |
f3ed775e DG |
265 | int i = 0, ret; |
266 | struct cmd_struct *cmd; | |
1c9f7941 | 267 | |
f3ed775e DG |
268 | if (*argv == NULL) { |
269 | ret = CMD_SUCCESS; | |
47b74d63 | 270 | goto end; |
1c9f7941 DG |
271 | } |
272 | ||
f3ed775e DG |
273 | cmd = &commands[i]; |
274 | while (cmd->func != NULL) { | |
275 | /* Find command */ | |
276 | if (strcmp(argv[0], cmd->name) == 0) { | |
277 | ret = cmd->func(argc, (const char**) argv); | |
f3ed775e | 278 | goto end; |
894be886 | 279 | } |
f3ed775e DG |
280 | i++; |
281 | cmd = &commands[i]; | |
894be886 DG |
282 | } |
283 | ||
f3ed775e | 284 | /* Command not found */ |
4ce78777 | 285 | ret = CMD_UNDEFINED; |
894be886 DG |
286 | |
287 | end: | |
f3ed775e | 288 | return ret; |
8548ff30 DG |
289 | } |
290 | ||
5b8719f5 DG |
291 | /* |
292 | * spawn_sessiond | |
293 | * | |
294 | * Spawn a session daemon by forking and execv. | |
295 | */ | |
296 | static int spawn_sessiond(char *pathname) | |
297 | { | |
298 | int ret = 0; | |
299 | pid_t pid; | |
300 | ||
f3ed775e | 301 | MSG("Spawning a session daemon"); |
5a532b68 | 302 | recv_child_signal = 0; |
5b8719f5 DG |
303 | pid = fork(); |
304 | if (pid == 0) { | |
5e16da05 MD |
305 | /* |
306 | * Spawn session daemon and tell | |
5b8719f5 DG |
307 | * it to signal us when ready. |
308 | */ | |
32258573 | 309 | execlp(pathname, "lttng-sessiond", "--sig-parent", "--quiet", NULL); |
5e16da05 MD |
310 | /* execlp only returns if error happened */ |
311 | if (errno == ENOENT) { | |
312 | ERR("No session daemon found. Use --sessiond-path."); | |
313 | } else { | |
314 | perror("execlp"); | |
5b8719f5 | 315 | } |
5a532b68 | 316 | kill(getppid(), SIGTERM); /* wake parent */ |
5e16da05 | 317 | exit(EXIT_FAILURE); |
5b8719f5 | 318 | } else if (pid > 0) { |
8db8d1dc | 319 | sessiond_pid = pid; |
5a532b68 | 320 | /* |
af87c45a DG |
321 | * Wait for lttng-sessiond to start. We need to use a flag to check if |
322 | * the signal has been sent to us, because the child can be scheduled | |
323 | * before the parent, and thus send the signal before this check. In | |
324 | * the signal handler, we set the recv_child_signal flag, so anytime we | |
325 | * check it after the fork is fine. Note that sleep() is interrupted | |
326 | * before the 1 second delay as soon as the signal is received, so it | |
327 | * will not cause visible delay for the user. | |
5a532b68 MD |
328 | */ |
329 | while (!recv_child_signal) { | |
330 | sleep(1); | |
331 | } | |
af87c45a DG |
332 | /* |
333 | * The signal handler will nullify sessiond_pid on SIGCHLD | |
334 | */ | |
8db8d1dc DG |
335 | if (!sessiond_pid) { |
336 | exit(EXIT_FAILURE); | |
337 | } | |
5b8719f5 DG |
338 | goto end; |
339 | } else { | |
340 | perror("fork"); | |
341 | ret = -1; | |
342 | goto end; | |
343 | } | |
344 | ||
345 | end: | |
346 | return ret; | |
347 | } | |
348 | ||
fac6795d | 349 | /* |
f3ed775e | 350 | * check_sessiond |
fac6795d DG |
351 | * |
352 | * Check if the session daemon is available using | |
5b8719f5 DG |
353 | * the liblttngctl API for the check. If not, try to |
354 | * spawn a daemon. | |
fac6795d | 355 | */ |
f3ed775e | 356 | static int check_sessiond(void) |
fac6795d DG |
357 | { |
358 | int ret; | |
b8ec3da8 | 359 | char *pathname = NULL; |
fac6795d | 360 | |
947308c4 DG |
361 | ret = lttng_session_daemon_alive(); |
362 | if (ret == 0) { /* not alive */ | |
5b8719f5 | 363 | /* Try command line option path */ |
b8ec3da8 SM |
364 | pathname = opt_sessiond_path; |
365 | ||
366 | /* Try LTTNG_SESSIOND_PATH env variable */ | |
367 | if (pathname == NULL) { | |
bbccc3d2 | 368 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); |
5b8719f5 DG |
369 | } |
370 | ||
b8ec3da8 | 371 | /* Try with configured path */ |
5b8719f5 | 372 | if (pathname == NULL) { |
b8ec3da8 SM |
373 | if (CONFIG_SESSIOND_BIN[0] != '\0') { |
374 | pathname = CONFIG_SESSIOND_BIN; | |
5b8719f5 | 375 | } |
b8ec3da8 SM |
376 | } |
377 | ||
378 | /* Let's rock and roll while trying the default path */ | |
379 | if (pathname == NULL) { | |
380 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; | |
381 | } | |
382 | ||
383 | DBG("Session daemon at: %s", pathname); | |
384 | ||
385 | /* Check existence and permissions */ | |
386 | ret = access(pathname, F_OK | X_OK); | |
387 | if (ret < 0) { | |
388 | ERR("No such file or access denied: %s", pathname); | |
389 | goto end; | |
5b8719f5 DG |
390 | } |
391 | ||
392 | ret = spawn_sessiond(pathname); | |
5b8719f5 | 393 | if (ret < 0) { |
3183dbb0 | 394 | ERR("Problem occurred when starting %s", pathname); |
5b8719f5 | 395 | } |
c2a79a67 | 396 | } |
5b8719f5 | 397 | end: |
fac6795d DG |
398 | return ret; |
399 | } | |
400 | ||
bcfa8a05 | 401 | /* |
679b4943 SM |
402 | * Check args for specific options that *must* not trigger a session daemon |
403 | * execution. | |
404 | * | |
405 | * Return 1 if match else 0. | |
bcfa8a05 | 406 | */ |
679b4943 | 407 | static int check_args_no_sessiond(int argc, char **argv) |
bcfa8a05 DG |
408 | { |
409 | int i; | |
410 | ||
411 | for (i = 0; i < argc; i++) { | |
ba2926ef MD |
412 | if ((strncmp(argv[i], "-h", sizeof("-h")) == 0) || |
413 | strncmp(argv[i], "--h", sizeof("--h")) == 0 || | |
3183dbb0 | 414 | strncmp(argv[i], "--list-options", sizeof("--list-options")) == 0 || |
4747a49b | 415 | strncmp(argv[i], "--list-commands", sizeof("--list-commands")) == 0 || |
0c95f5b2 DG |
416 | strncmp(argv[i], "version", sizeof("version")) == 0 || |
417 | strncmp(argv[i], "view", sizeof("view")) == 0) { | |
bcfa8a05 DG |
418 | return 1; |
419 | } | |
420 | } | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
5b8719f5 | 425 | /* |
3183dbb0 | 426 | * Parse command line arguments. |
5b8719f5 | 427 | * |
3183dbb0 | 428 | * Return 0 if OK, else -1 |
5b8719f5 | 429 | */ |
f3ed775e | 430 | static int parse_args(int argc, char **argv) |
5b8719f5 | 431 | { |
f3ed775e | 432 | int opt, ret; |
5b8719f5 | 433 | |
f3ed775e DG |
434 | if (argc < 2) { |
435 | usage(stderr); | |
436 | clean_exit(EXIT_FAILURE); | |
5b8719f5 DG |
437 | } |
438 | ||
70318c38 | 439 | while ((opt = getopt_long(argc, argv, "+Vhnvqg:", long_options, NULL)) != -1) { |
f3ed775e | 440 | switch (opt) { |
70318c38 SS |
441 | case 'V': |
442 | version(stdout); | |
443 | ret = 0; | |
444 | goto end; | |
f3ed775e | 445 | case 'h': |
3183dbb0 | 446 | usage(stdout); |
ae856491 | 447 | ret = 0; |
3183dbb0 | 448 | goto end; |
f3ed775e | 449 | case 'v': |
97e19046 | 450 | lttng_opt_verbose += 1; |
f3ed775e DG |
451 | break; |
452 | case 'q': | |
97e19046 | 453 | lttng_opt_quiet = 1; |
f3ed775e DG |
454 | break; |
455 | case 'g': | |
456 | lttng_set_tracing_group(optarg); | |
457 | break; | |
8490ae7b | 458 | case 'n': |
f3ed775e DG |
459 | opt_no_sessiond = 1; |
460 | break; | |
461 | case OPT_SESSION_PATH: | |
462 | opt_sessiond_path = strdup(optarg); | |
463 | break; | |
865abf65 SM |
464 | case OPT_DUMP_OPTIONS: |
465 | list_options(stdout); | |
466 | ret = 0; | |
3183dbb0 | 467 | goto end; |
865abf65 SM |
468 | case OPT_DUMP_COMMANDS: |
469 | list_commands(stdout); | |
470 | ret = 0; | |
3183dbb0 | 471 | goto end; |
f3ed775e DG |
472 | default: |
473 | usage(stderr); | |
ae856491 | 474 | ret = 1; |
f3ed775e DG |
475 | goto error; |
476 | } | |
5b8719f5 | 477 | } |
fac6795d | 478 | |
f3ed775e | 479 | /* If both options are specified, quiet wins */ |
97e19046 DG |
480 | if (lttng_opt_verbose && lttng_opt_quiet) { |
481 | lttng_opt_verbose = 0; | |
5b8719f5 DG |
482 | } |
483 | ||
f3ed775e | 484 | /* Spawn session daemon if needed */ |
679b4943 | 485 | if (opt_no_sessiond == 0 && check_args_no_sessiond(argc, argv) == 0 && |
bcfa8a05 | 486 | (check_sessiond() < 0)) { |
8005f29a | 487 | ret = 1; |
f3ed775e | 488 | goto error; |
5b8719f5 DG |
489 | } |
490 | ||
f3ed775e DG |
491 | /* No leftovers, print usage and quit */ |
492 | if ((argc - optind) == 0) { | |
493 | usage(stderr); | |
8005f29a | 494 | ret = 1; |
f3ed775e DG |
495 | goto error; |
496 | } | |
7442b2ba | 497 | |
f3ed775e DG |
498 | /* |
499 | * Handle leftovers which is a first level command with the trailing | |
500 | * options. | |
501 | */ | |
502 | ret = handle_command(argc - optind, argv + optind); | |
ae856491 DG |
503 | switch (ret) { |
504 | case CMD_WARNING: | |
505 | WARN("Some command(s) went wrong"); | |
506 | break; | |
507 | case CMD_ERROR: | |
508 | ERR("Command error"); | |
509 | break; | |
510 | case CMD_UNDEFINED: | |
511 | ERR("Undefined command"); | |
512 | break; | |
513 | case CMD_FATAL: | |
514 | ERR("Fatal error"); | |
515 | break; | |
4ce78777 DG |
516 | case CMD_UNSUPPORTED: |
517 | ERR("Unsupported command"); | |
518 | break; | |
ae856491 DG |
519 | case -1: |
520 | usage(stderr); | |
521 | ret = 1; | |
522 | break; | |
523 | case 0: | |
524 | break; | |
525 | default: | |
42224349 DG |
526 | if (ret < 0) { |
527 | ret = -ret; | |
528 | } | |
ae856491 | 529 | break; |
96243366 DG |
530 | } |
531 | ||
3183dbb0 | 532 | end: |
f3ed775e | 533 | error: |
ae856491 | 534 | return ret; |
fac6795d DG |
535 | } |
536 | ||
f3ed775e | 537 | |
fac6795d | 538 | /* |
5b8719f5 | 539 | * main |
fac6795d DG |
540 | */ |
541 | int main(int argc, char *argv[]) | |
542 | { | |
543 | int ret; | |
cbbb813a | 544 | char *user; |
fac6795d DG |
545 | |
546 | progname = argv[0] ? argv[0] : "lttng"; | |
547 | ||
99bab54f | 548 | /* For Mathieu Desnoyers a.k.a. Dr. Tracing */ |
cbbb813a DG |
549 | user = getenv("USER"); |
550 | if (user != NULL && ((strncmp(progname, "drtrace", 7) == 0 || | |
551 | strncmp("compudj", user, 7) == 0))) { | |
4666e71c | 552 | MSG("%c[%d;%dmWelcome back Dr Tracing!%c[%dm\n", 27,1,33,27,0); |
fac6795d | 553 | } |
cbbb813a | 554 | /* Thanks Mathieu */ |
fac6795d | 555 | |
5b8719f5 DG |
556 | ret = set_signal_handler(); |
557 | if (ret < 0) { | |
87378cf5 | 558 | clean_exit(ret); |
5b8719f5 DG |
559 | } |
560 | ||
f3ed775e | 561 | ret = parse_args(argc, argv); |
ae856491 DG |
562 | if (ret != 0) { |
563 | clean_exit(ret); | |
1fff1faa | 564 | } |
87378cf5 | 565 | |
fac6795d DG |
566 | return 0; |
567 | } |