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 | |
8960e9cd DG |
42 | char *opt_relayd_path; |
43 | ||
f3ed775e | 44 | enum { |
8960e9cd | 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}, |
8960e9cd | 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}, |
c864d6d7 | 83 | { "save", cmd_save}, |
9c6bda17 DG |
84 | { "enable-consumer", cmd_enable_consumer}, /* OBSOLETE */ |
85 | { "disable-consumer", cmd_disable_consumer}, /* OBSOLETE */ | |
f3ed775e DG |
86 | { NULL, NULL} /* Array closure */ |
87 | }; | |
88 | ||
89 | static void usage(FILE *ofp) | |
8c0faa1d | 90 | { |
c6d4a597 | 91 | fprintf(ofp, "LTTng Trace Control " VERSION" - " VERSION_NAME"\n\n"); |
32a6298d | 92 | fprintf(ofp, "usage: lttng [OPTIONS] <COMMAND> [<ARGS>]\n"); |
f3ed775e DG |
93 | fprintf(ofp, "\n"); |
94 | fprintf(ofp, "Options:\n"); | |
70318c38 | 95 | fprintf(ofp, " -V, --version Show version\n"); |
99bab54f TD |
96 | fprintf(ofp, " -h, --help Show this help\n"); |
97 | fprintf(ofp, " --list-options Simple listing of lttng options\n"); | |
98 | fprintf(ofp, " --list-commands Simple listing of lttng commands\n"); | |
99 | fprintf(ofp, " -v, --verbose Increase verbosity\n"); | |
100 | fprintf(ofp, " -q, --quiet Quiet mode\n"); | |
101 | fprintf(ofp, " -g, --group NAME Unix tracing group name. (default: tracing)\n"); | |
102 | fprintf(ofp, " -n, --no-sessiond Don't spawn a session daemon\n"); | |
103 | fprintf(ofp, " --sessiond-path PATH Session daemon full path\n"); | |
8960e9cd | 104 | fprintf(ofp, " --relayd-path PATH Relayd daemon full path\n"); |
f3ed775e DG |
105 | fprintf(ofp, "\n"); |
106 | fprintf(ofp, "Commands:\n"); | |
00e2e675 DG |
107 | fprintf(ofp, " add-context Add context to event and/or channel\n"); |
108 | fprintf(ofp, " calibrate Quantify LTTng overhead\n"); | |
109 | fprintf(ofp, " create Create tracing session\n"); | |
110 | fprintf(ofp, " destroy Tear down tracing session\n"); | |
111 | fprintf(ofp, " enable-channel Enable tracing channel\n"); | |
112 | fprintf(ofp, " enable-event Enable tracing event\n"); | |
113 | fprintf(ofp, " disable-channel Disable tracing channel\n"); | |
114 | fprintf(ofp, " disable-event Disable tracing event\n"); | |
00e2e675 DG |
115 | fprintf(ofp, " list List possible tracing options\n"); |
116 | fprintf(ofp, " set-session Set current session name\n"); | |
57f272ed | 117 | fprintf(ofp, " snapshot Snapshot buffers of current session name\n"); |
00e2e675 DG |
118 | fprintf(ofp, " start Start tracing\n"); |
119 | fprintf(ofp, " stop Stop tracing\n"); | |
120 | fprintf(ofp, " version Show version information\n"); | |
121 | fprintf(ofp, " view Start trace viewer\n"); | |
c864d6d7 | 122 | fprintf(ofp, " save Save session configuration\n"); |
f3ed775e | 123 | fprintf(ofp, "\n"); |
99bab54f TD |
124 | fprintf(ofp, "Each command also has its own -h, --help option.\n"); |
125 | fprintf(ofp, "\n"); | |
f3ed775e DG |
126 | fprintf(ofp, "Please see the lttng(1) man page for full documentation.\n"); |
127 | fprintf(ofp, "See http://lttng.org for updates, bug reports and news.\n"); | |
8c0faa1d DG |
128 | } |
129 | ||
70318c38 SS |
130 | static void version(FILE *ofp) |
131 | { | |
132 | fprintf(ofp, "%s (LTTng Trace Control) " VERSION" - " VERSION_NAME"\n", | |
133 | progname); | |
134 | } | |
135 | ||
865abf65 SM |
136 | /* |
137 | * list_options | |
138 | * | |
139 | * List options line by line. This is mostly for bash auto completion and to | |
140 | * avoid difficult parsing. | |
141 | */ | |
142 | static void list_options(FILE *ofp) | |
143 | { | |
144 | int i = 0; | |
145 | struct option *option = NULL; | |
146 | ||
147 | option = &long_options[i]; | |
148 | while (option->name != NULL) { | |
149 | fprintf(ofp, "--%s\n", option->name); | |
150 | ||
151 | if (isprint(option->val)) { | |
152 | fprintf(ofp, "-%c\n", option->val); | |
153 | } | |
154 | ||
155 | i++; | |
156 | option = &long_options[i]; | |
157 | } | |
158 | } | |
159 | ||
7442b2ba | 160 | /* |
f3ed775e | 161 | * clean_exit |
96243366 | 162 | */ |
f3ed775e | 163 | static void clean_exit(int code) |
96243366 | 164 | { |
f3ed775e DG |
165 | DBG("Clean exit"); |
166 | exit(code); | |
894be886 | 167 | } |
96243366 | 168 | |
894be886 | 169 | /* |
f3ed775e | 170 | * sighandler |
2ef84c95 | 171 | * |
f3ed775e | 172 | * Signal handler for the daemon |
2ef84c95 | 173 | */ |
f3ed775e | 174 | static void sighandler(int sig) |
2ef84c95 | 175 | { |
8db8d1dc DG |
176 | int status; |
177 | ||
f3ed775e DG |
178 | switch (sig) { |
179 | case SIGTERM: | |
99bab54f | 180 | DBG("SIGTERM caught"); |
f3ed775e DG |
181 | clean_exit(EXIT_FAILURE); |
182 | break; | |
183 | case SIGCHLD: | |
99bab54f | 184 | DBG("SIGCHLD caught"); |
8db8d1dc | 185 | waitpid(sessiond_pid, &status, 0); |
5a532b68 | 186 | recv_child_signal = 1; |
8db8d1dc DG |
187 | /* Indicate that the session daemon died */ |
188 | sessiond_pid = 0; | |
189 | ERR("Session daemon died (exit status %d)", WEXITSTATUS(status)); | |
190 | break; | |
191 | case SIGUSR1: | |
192 | /* Notify is done */ | |
5a532b68 | 193 | recv_child_signal = 1; |
99bab54f | 194 | DBG("SIGUSR1 caught"); |
f3ed775e DG |
195 | break; |
196 | default: | |
99bab54f | 197 | DBG("Unknown signal %d caught", sig); |
f3ed775e | 198 | break; |
2ef84c95 DG |
199 | } |
200 | ||
f3ed775e | 201 | return; |
2ef84c95 DG |
202 | } |
203 | ||
204 | /* | |
f3ed775e | 205 | * set_signal_handler |
894be886 | 206 | * |
f3ed775e | 207 | * Setup signal handler for SIGCHLD and SIGTERM. |
894be886 | 208 | */ |
f3ed775e | 209 | static int set_signal_handler(void) |
894be886 | 210 | { |
f3ed775e DG |
211 | int ret = 0; |
212 | struct sigaction sa; | |
213 | sigset_t sigset; | |
33a2b854 | 214 | |
f3ed775e DG |
215 | if ((ret = sigemptyset(&sigset)) < 0) { |
216 | perror("sigemptyset"); | |
33a2b854 DG |
217 | goto end; |
218 | } | |
219 | ||
f3ed775e DG |
220 | sa.sa_handler = sighandler; |
221 | sa.sa_mask = sigset; | |
222 | sa.sa_flags = 0; | |
8db8d1dc | 223 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
f3ed775e | 224 | perror("sigaction"); |
96243366 DG |
225 | goto end; |
226 | } | |
227 | ||
f3ed775e DG |
228 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
229 | perror("sigaction"); | |
230 | goto end; | |
894be886 DG |
231 | } |
232 | ||
8db8d1dc DG |
233 | if ((ret = sigaction(SIGCHLD, &sa, NULL)) < 0) { |
234 | perror("sigaction"); | |
235 | goto end; | |
236 | } | |
237 | ||
96243366 | 238 | end: |
57167058 DG |
239 | return ret; |
240 | } | |
241 | ||
fac6795d | 242 | /* |
f3ed775e | 243 | * handle_command |
fac6795d | 244 | * |
f3ed775e DG |
245 | * Handle the full argv list of a first level command. Will find the command |
246 | * in the global commands array and call the function callback associated. | |
1c9f7941 | 247 | * |
f3ed775e DG |
248 | * If command not found, return -1 |
249 | * else, return function command error code. | |
1c9f7941 | 250 | */ |
f3ed775e | 251 | static int handle_command(int argc, char **argv) |
1c9f7941 | 252 | { |
f3ed775e DG |
253 | int i = 0, ret; |
254 | struct cmd_struct *cmd; | |
1c9f7941 | 255 | |
f3ed775e DG |
256 | if (*argv == NULL) { |
257 | ret = CMD_SUCCESS; | |
47b74d63 | 258 | goto end; |
1c9f7941 DG |
259 | } |
260 | ||
f3ed775e DG |
261 | cmd = &commands[i]; |
262 | while (cmd->func != NULL) { | |
263 | /* Find command */ | |
264 | if (strcmp(argv[0], cmd->name) == 0) { | |
265 | ret = cmd->func(argc, (const char**) argv); | |
f3ed775e | 266 | goto end; |
894be886 | 267 | } |
f3ed775e DG |
268 | i++; |
269 | cmd = &commands[i]; | |
894be886 DG |
270 | } |
271 | ||
f3ed775e | 272 | /* Command not found */ |
4ce78777 | 273 | ret = CMD_UNDEFINED; |
894be886 DG |
274 | |
275 | end: | |
f3ed775e | 276 | return ret; |
8548ff30 DG |
277 | } |
278 | ||
5b8719f5 DG |
279 | /* |
280 | * spawn_sessiond | |
281 | * | |
282 | * Spawn a session daemon by forking and execv. | |
283 | */ | |
284 | static int spawn_sessiond(char *pathname) | |
285 | { | |
286 | int ret = 0; | |
287 | pid_t pid; | |
288 | ||
f3ed775e | 289 | MSG("Spawning a session daemon"); |
5a532b68 | 290 | recv_child_signal = 0; |
5b8719f5 DG |
291 | pid = fork(); |
292 | if (pid == 0) { | |
5e16da05 MD |
293 | /* |
294 | * Spawn session daemon and tell | |
5b8719f5 DG |
295 | * it to signal us when ready. |
296 | */ | |
32258573 | 297 | execlp(pathname, "lttng-sessiond", "--sig-parent", "--quiet", NULL); |
5e16da05 MD |
298 | /* execlp only returns if error happened */ |
299 | if (errno == ENOENT) { | |
300 | ERR("No session daemon found. Use --sessiond-path."); | |
301 | } else { | |
302 | perror("execlp"); | |
5b8719f5 | 303 | } |
5a532b68 | 304 | kill(getppid(), SIGTERM); /* wake parent */ |
5e16da05 | 305 | exit(EXIT_FAILURE); |
5b8719f5 | 306 | } else if (pid > 0) { |
8db8d1dc | 307 | sessiond_pid = pid; |
5a532b68 | 308 | /* |
af87c45a DG |
309 | * Wait for lttng-sessiond to start. We need to use a flag to check if |
310 | * the signal has been sent to us, because the child can be scheduled | |
311 | * before the parent, and thus send the signal before this check. In | |
312 | * the signal handler, we set the recv_child_signal flag, so anytime we | |
313 | * check it after the fork is fine. Note that sleep() is interrupted | |
314 | * before the 1 second delay as soon as the signal is received, so it | |
315 | * will not cause visible delay for the user. | |
5a532b68 MD |
316 | */ |
317 | while (!recv_child_signal) { | |
318 | sleep(1); | |
319 | } | |
af87c45a DG |
320 | /* |
321 | * The signal handler will nullify sessiond_pid on SIGCHLD | |
322 | */ | |
8db8d1dc DG |
323 | if (!sessiond_pid) { |
324 | exit(EXIT_FAILURE); | |
325 | } | |
5b8719f5 DG |
326 | goto end; |
327 | } else { | |
328 | perror("fork"); | |
329 | ret = -1; | |
330 | goto end; | |
331 | } | |
332 | ||
333 | end: | |
334 | return ret; | |
335 | } | |
336 | ||
fac6795d | 337 | /* |
f3ed775e | 338 | * check_sessiond |
fac6795d DG |
339 | * |
340 | * Check if the session daemon is available using | |
5b8719f5 DG |
341 | * the liblttngctl API for the check. If not, try to |
342 | * spawn a daemon. | |
fac6795d | 343 | */ |
f3ed775e | 344 | static int check_sessiond(void) |
fac6795d DG |
345 | { |
346 | int ret; | |
b8ec3da8 | 347 | char *pathname = NULL; |
fac6795d | 348 | |
947308c4 DG |
349 | ret = lttng_session_daemon_alive(); |
350 | if (ret == 0) { /* not alive */ | |
5b8719f5 | 351 | /* Try command line option path */ |
b8ec3da8 SM |
352 | pathname = opt_sessiond_path; |
353 | ||
354 | /* Try LTTNG_SESSIOND_PATH env variable */ | |
355 | if (pathname == NULL) { | |
bbccc3d2 | 356 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); |
5b8719f5 DG |
357 | } |
358 | ||
b8ec3da8 | 359 | /* Try with configured path */ |
5b8719f5 | 360 | if (pathname == NULL) { |
b8ec3da8 SM |
361 | if (CONFIG_SESSIOND_BIN[0] != '\0') { |
362 | pathname = CONFIG_SESSIOND_BIN; | |
5b8719f5 | 363 | } |
b8ec3da8 SM |
364 | } |
365 | ||
366 | /* Let's rock and roll while trying the default path */ | |
367 | if (pathname == NULL) { | |
368 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; | |
369 | } | |
370 | ||
371 | DBG("Session daemon at: %s", pathname); | |
372 | ||
373 | /* Check existence and permissions */ | |
374 | ret = access(pathname, F_OK | X_OK); | |
375 | if (ret < 0) { | |
376 | ERR("No such file or access denied: %s", pathname); | |
377 | goto end; | |
5b8719f5 DG |
378 | } |
379 | ||
380 | ret = spawn_sessiond(pathname); | |
5b8719f5 | 381 | if (ret < 0) { |
3183dbb0 | 382 | ERR("Problem occurred when starting %s", pathname); |
5b8719f5 | 383 | } |
c2a79a67 | 384 | } |
5b8719f5 | 385 | end: |
fac6795d DG |
386 | return ret; |
387 | } | |
388 | ||
bcfa8a05 | 389 | /* |
679b4943 SM |
390 | * Check args for specific options that *must* not trigger a session daemon |
391 | * execution. | |
392 | * | |
393 | * Return 1 if match else 0. | |
bcfa8a05 | 394 | */ |
679b4943 | 395 | static int check_args_no_sessiond(int argc, char **argv) |
bcfa8a05 DG |
396 | { |
397 | int i; | |
398 | ||
399 | for (i = 0; i < argc; i++) { | |
ba2926ef MD |
400 | if ((strncmp(argv[i], "-h", sizeof("-h")) == 0) || |
401 | strncmp(argv[i], "--h", sizeof("--h")) == 0 || | |
3183dbb0 | 402 | strncmp(argv[i], "--list-options", sizeof("--list-options")) == 0 || |
4747a49b | 403 | strncmp(argv[i], "--list-commands", sizeof("--list-commands")) == 0 || |
0c95f5b2 DG |
404 | strncmp(argv[i], "version", sizeof("version")) == 0 || |
405 | strncmp(argv[i], "view", sizeof("view")) == 0) { | |
bcfa8a05 DG |
406 | return 1; |
407 | } | |
408 | } | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
5b8719f5 | 413 | /* |
3183dbb0 | 414 | * Parse command line arguments. |
5b8719f5 | 415 | * |
3183dbb0 | 416 | * Return 0 if OK, else -1 |
5b8719f5 | 417 | */ |
f3ed775e | 418 | static int parse_args(int argc, char **argv) |
5b8719f5 | 419 | { |
f3ed775e | 420 | int opt, ret; |
5b8719f5 | 421 | |
f3ed775e DG |
422 | if (argc < 2) { |
423 | usage(stderr); | |
424 | clean_exit(EXIT_FAILURE); | |
5b8719f5 DG |
425 | } |
426 | ||
70318c38 | 427 | while ((opt = getopt_long(argc, argv, "+Vhnvqg:", long_options, NULL)) != -1) { |
f3ed775e | 428 | switch (opt) { |
70318c38 SS |
429 | case 'V': |
430 | version(stdout); | |
431 | ret = 0; | |
432 | goto end; | |
f3ed775e | 433 | case 'h': |
3183dbb0 | 434 | usage(stdout); |
ae856491 | 435 | ret = 0; |
3183dbb0 | 436 | goto end; |
f3ed775e | 437 | case 'v': |
97e19046 | 438 | lttng_opt_verbose += 1; |
f3ed775e DG |
439 | break; |
440 | case 'q': | |
97e19046 | 441 | lttng_opt_quiet = 1; |
f3ed775e DG |
442 | break; |
443 | case 'g': | |
444 | lttng_set_tracing_group(optarg); | |
445 | break; | |
8490ae7b | 446 | case 'n': |
f3ed775e DG |
447 | opt_no_sessiond = 1; |
448 | break; | |
449 | case OPT_SESSION_PATH: | |
450 | opt_sessiond_path = strdup(optarg); | |
451 | break; | |
8960e9cd DG |
452 | case OPT_RELAYD_PATH: |
453 | opt_relayd_path = strdup(optarg); | |
454 | break; | |
865abf65 SM |
455 | case OPT_DUMP_OPTIONS: |
456 | list_options(stdout); | |
457 | ret = 0; | |
3183dbb0 | 458 | goto end; |
865abf65 | 459 | case OPT_DUMP_COMMANDS: |
3c9bd23c | 460 | list_commands(commands, stdout); |
865abf65 | 461 | ret = 0; |
3183dbb0 | 462 | goto end; |
f3ed775e DG |
463 | default: |
464 | usage(stderr); | |
ae856491 | 465 | ret = 1; |
f3ed775e DG |
466 | goto error; |
467 | } | |
5b8719f5 | 468 | } |
fac6795d | 469 | |
f3ed775e | 470 | /* If both options are specified, quiet wins */ |
97e19046 DG |
471 | if (lttng_opt_verbose && lttng_opt_quiet) { |
472 | lttng_opt_verbose = 0; | |
5b8719f5 DG |
473 | } |
474 | ||
f3ed775e | 475 | /* Spawn session daemon if needed */ |
679b4943 | 476 | if (opt_no_sessiond == 0 && check_args_no_sessiond(argc, argv) == 0 && |
bcfa8a05 | 477 | (check_sessiond() < 0)) { |
8005f29a | 478 | ret = 1; |
f3ed775e | 479 | goto error; |
5b8719f5 DG |
480 | } |
481 | ||
f3ed775e DG |
482 | /* No leftovers, print usage and quit */ |
483 | if ((argc - optind) == 0) { | |
484 | usage(stderr); | |
8005f29a | 485 | ret = 1; |
f3ed775e DG |
486 | goto error; |
487 | } | |
7442b2ba | 488 | |
f3ed775e DG |
489 | /* |
490 | * Handle leftovers which is a first level command with the trailing | |
491 | * options. | |
492 | */ | |
493 | ret = handle_command(argc - optind, argv + optind); | |
ae856491 DG |
494 | switch (ret) { |
495 | case CMD_WARNING: | |
496 | WARN("Some command(s) went wrong"); | |
497 | break; | |
498 | case CMD_ERROR: | |
499 | ERR("Command error"); | |
500 | break; | |
501 | case CMD_UNDEFINED: | |
502 | ERR("Undefined command"); | |
503 | break; | |
504 | case CMD_FATAL: | |
505 | ERR("Fatal error"); | |
506 | break; | |
4ce78777 DG |
507 | case CMD_UNSUPPORTED: |
508 | ERR("Unsupported command"); | |
509 | break; | |
ae856491 DG |
510 | case -1: |
511 | usage(stderr); | |
512 | ret = 1; | |
513 | break; | |
514 | case 0: | |
515 | break; | |
516 | default: | |
42224349 DG |
517 | if (ret < 0) { |
518 | ret = -ret; | |
519 | } | |
ae856491 | 520 | break; |
96243366 DG |
521 | } |
522 | ||
3183dbb0 | 523 | end: |
f3ed775e | 524 | error: |
ae856491 | 525 | return ret; |
fac6795d DG |
526 | } |
527 | ||
f3ed775e | 528 | |
fac6795d | 529 | /* |
5b8719f5 | 530 | * main |
fac6795d DG |
531 | */ |
532 | int main(int argc, char *argv[]) | |
533 | { | |
534 | int ret; | |
cbbb813a | 535 | char *user; |
fac6795d DG |
536 | |
537 | progname = argv[0] ? argv[0] : "lttng"; | |
538 | ||
99bab54f | 539 | /* For Mathieu Desnoyers a.k.a. Dr. Tracing */ |
cbbb813a DG |
540 | user = getenv("USER"); |
541 | if (user != NULL && ((strncmp(progname, "drtrace", 7) == 0 || | |
542 | strncmp("compudj", user, 7) == 0))) { | |
4666e71c | 543 | MSG("%c[%d;%dmWelcome back Dr Tracing!%c[%dm\n", 27,1,33,27,0); |
fac6795d | 544 | } |
cbbb813a | 545 | /* Thanks Mathieu */ |
fac6795d | 546 | |
5b8719f5 DG |
547 | ret = set_signal_handler(); |
548 | if (ret < 0) { | |
87378cf5 | 549 | clean_exit(ret); |
5b8719f5 DG |
550 | } |
551 | ||
f3ed775e | 552 | ret = parse_args(argc, argv); |
ae856491 DG |
553 | if (ret != 0) { |
554 | clean_exit(ret); | |
1fff1faa | 555 | } |
87378cf5 | 556 | |
fac6795d DG |
557 | return 0; |
558 | } |