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'}, | |
c7e35b03 | 58 | {"mi", 1, NULL, 'm'}, |
8490ae7b | 59 | {"no-sessiond", 0, NULL, 'n'}, |
f3ed775e | 60 | {"sessiond-path", 1, NULL, OPT_SESSION_PATH}, |
8960e9cd | 61 | {"relayd-path", 1, NULL, OPT_RELAYD_PATH}, |
865abf65 SM |
62 | {"list-options", 0, NULL, OPT_DUMP_OPTIONS}, |
63 | {"list-commands", 0, NULL, OPT_DUMP_COMMANDS}, | |
f3ed775e DG |
64 | {NULL, 0, NULL, 0} |
65 | }; | |
66 | ||
67 | /* First level command */ | |
68 | static struct cmd_struct commands[] = { | |
69 | { "list", cmd_list}, | |
70 | { "create", cmd_create}, | |
71 | { "destroy", cmd_destroy}, | |
f3ed775e DG |
72 | { "start", cmd_start}, |
73 | { "stop", cmd_stop}, | |
74 | { "enable-event", cmd_enable_events}, | |
e953ef25 | 75 | { "disable-event", cmd_disable_events}, |
d36b8583 | 76 | { "enable-channel", cmd_enable_channels}, |
26cc6b4e | 77 | { "disable-channel", cmd_disable_channels}, |
d65106b1 | 78 | { "add-context", cmd_add_context}, |
3087ef18 | 79 | { "set-session", cmd_set_session}, |
eb9cb8b7 | 80 | { "version", cmd_version}, |
d0254c7c | 81 | { "calibrate", cmd_calibrate}, |
0c95f5b2 | 82 | { "view", cmd_view}, |
57f272ed | 83 | { "snapshot", cmd_snapshot}, |
c864d6d7 | 84 | { "save", cmd_save}, |
8c42d845 | 85 | { "load", cmd_load}, |
f3ed775e DG |
86 | { NULL, NULL} /* Array closure */ |
87 | }; | |
88 | ||
89 | static void usage(FILE *ofp) | |
8c0faa1d | 90 | { |
4c6ac053 MD |
91 | fprintf(ofp, "LTTng Trace Control " VERSION " - " VERSION_NAME "%s\n\n", |
92 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION); | |
32a6298d | 93 | fprintf(ofp, "usage: lttng [OPTIONS] <COMMAND> [<ARGS>]\n"); |
f3ed775e DG |
94 | fprintf(ofp, "\n"); |
95 | fprintf(ofp, "Options:\n"); | |
70318c38 | 96 | fprintf(ofp, " -V, --version Show version\n"); |
99bab54f TD |
97 | fprintf(ofp, " -h, --help Show this help\n"); |
98 | fprintf(ofp, " --list-options Simple listing of lttng options\n"); | |
99 | fprintf(ofp, " --list-commands Simple listing of lttng commands\n"); | |
100 | fprintf(ofp, " -v, --verbose Increase verbosity\n"); | |
101 | fprintf(ofp, " -q, --quiet Quiet mode\n"); | |
c7e35b03 JR |
102 | fprintf(ofp, " -m, --mi TYPE Machine Interface mode.\n"); |
103 | fprintf(ofp, " Type: xml\n"); | |
99bab54f TD |
104 | fprintf(ofp, " -g, --group NAME Unix tracing group name. (default: tracing)\n"); |
105 | fprintf(ofp, " -n, --no-sessiond Don't spawn a session daemon\n"); | |
106 | fprintf(ofp, " --sessiond-path PATH Session daemon full path\n"); | |
8960e9cd | 107 | fprintf(ofp, " --relayd-path PATH Relayd daemon full path\n"); |
f3ed775e DG |
108 | fprintf(ofp, "\n"); |
109 | fprintf(ofp, "Commands:\n"); | |
00e2e675 DG |
110 | fprintf(ofp, " add-context Add context to event and/or channel\n"); |
111 | fprintf(ofp, " calibrate Quantify LTTng overhead\n"); | |
112 | fprintf(ofp, " create Create tracing session\n"); | |
113 | fprintf(ofp, " destroy Tear down tracing session\n"); | |
114 | fprintf(ofp, " enable-channel Enable tracing channel\n"); | |
115 | fprintf(ofp, " enable-event Enable tracing event\n"); | |
116 | fprintf(ofp, " disable-channel Disable tracing channel\n"); | |
117 | fprintf(ofp, " disable-event Disable tracing event\n"); | |
00e2e675 DG |
118 | fprintf(ofp, " list List possible tracing options\n"); |
119 | fprintf(ofp, " set-session Set current session name\n"); | |
57f272ed | 120 | fprintf(ofp, " snapshot Snapshot buffers of current session name\n"); |
00e2e675 DG |
121 | fprintf(ofp, " start Start tracing\n"); |
122 | fprintf(ofp, " stop Stop tracing\n"); | |
123 | fprintf(ofp, " version Show version information\n"); | |
124 | fprintf(ofp, " view Start trace viewer\n"); | |
c864d6d7 | 125 | fprintf(ofp, " save Save session configuration\n"); |
8c42d845 | 126 | fprintf(ofp, " load Load session configuration\n"); |
f3ed775e | 127 | fprintf(ofp, "\n"); |
99bab54f TD |
128 | fprintf(ofp, "Each command also has its own -h, --help option.\n"); |
129 | fprintf(ofp, "\n"); | |
f3ed775e DG |
130 | fprintf(ofp, "Please see the lttng(1) man page for full documentation.\n"); |
131 | fprintf(ofp, "See http://lttng.org for updates, bug reports and news.\n"); | |
8c0faa1d DG |
132 | } |
133 | ||
70318c38 SS |
134 | static void version(FILE *ofp) |
135 | { | |
4c6ac053 MD |
136 | fprintf(ofp, "%s (LTTng Trace Control) " VERSION" - " VERSION_NAME "%s\n", |
137 | progname, | |
138 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION); | |
70318c38 SS |
139 | } |
140 | ||
c7e35b03 JR |
141 | /* |
142 | * Find the MI output type enum from a string. This function is for the support | |
143 | * of machine interface output. | |
144 | */ | |
145 | static int mi_output_type(const char *output_type) | |
146 | { | |
147 | int ret = 0; | |
148 | ||
149 | if (!strncasecmp("xml", output_type, 3)) { | |
150 | ret = LTTNG_MI_XML; | |
151 | } else { | |
152 | /* Invalid output format */ | |
153 | ERR("MI output format not supported"); | |
154 | ret = -LTTNG_ERR_MI_OUTPUT_TYPE; | |
155 | } | |
156 | ||
157 | return ret; | |
158 | } | |
159 | ||
865abf65 SM |
160 | /* |
161 | * list_options | |
162 | * | |
163 | * List options line by line. This is mostly for bash auto completion and to | |
164 | * avoid difficult parsing. | |
165 | */ | |
166 | static void list_options(FILE *ofp) | |
167 | { | |
168 | int i = 0; | |
169 | struct option *option = NULL; | |
170 | ||
171 | option = &long_options[i]; | |
172 | while (option->name != NULL) { | |
173 | fprintf(ofp, "--%s\n", option->name); | |
174 | ||
175 | if (isprint(option->val)) { | |
176 | fprintf(ofp, "-%c\n", option->val); | |
177 | } | |
178 | ||
179 | i++; | |
180 | option = &long_options[i]; | |
181 | } | |
182 | } | |
183 | ||
7442b2ba | 184 | /* |
f3ed775e | 185 | * clean_exit |
96243366 | 186 | */ |
f3ed775e | 187 | static void clean_exit(int code) |
96243366 | 188 | { |
f3ed775e DG |
189 | DBG("Clean exit"); |
190 | exit(code); | |
894be886 | 191 | } |
96243366 | 192 | |
894be886 | 193 | /* |
f3ed775e | 194 | * sighandler |
2ef84c95 | 195 | * |
f3ed775e | 196 | * Signal handler for the daemon |
2ef84c95 | 197 | */ |
f3ed775e | 198 | static void sighandler(int sig) |
2ef84c95 | 199 | { |
8db8d1dc DG |
200 | int status; |
201 | ||
f3ed775e DG |
202 | switch (sig) { |
203 | case SIGTERM: | |
99bab54f | 204 | DBG("SIGTERM caught"); |
f3ed775e DG |
205 | clean_exit(EXIT_FAILURE); |
206 | break; | |
207 | case SIGCHLD: | |
99bab54f | 208 | DBG("SIGCHLD caught"); |
8db8d1dc | 209 | waitpid(sessiond_pid, &status, 0); |
5a532b68 | 210 | recv_child_signal = 1; |
8db8d1dc DG |
211 | /* Indicate that the session daemon died */ |
212 | sessiond_pid = 0; | |
213 | ERR("Session daemon died (exit status %d)", WEXITSTATUS(status)); | |
214 | break; | |
215 | case SIGUSR1: | |
216 | /* Notify is done */ | |
5a532b68 | 217 | recv_child_signal = 1; |
99bab54f | 218 | DBG("SIGUSR1 caught"); |
f3ed775e DG |
219 | break; |
220 | default: | |
99bab54f | 221 | DBG("Unknown signal %d caught", sig); |
f3ed775e | 222 | break; |
2ef84c95 DG |
223 | } |
224 | ||
f3ed775e | 225 | return; |
2ef84c95 DG |
226 | } |
227 | ||
228 | /* | |
f3ed775e | 229 | * set_signal_handler |
894be886 | 230 | * |
f3ed775e | 231 | * Setup signal handler for SIGCHLD and SIGTERM. |
894be886 | 232 | */ |
f3ed775e | 233 | static int set_signal_handler(void) |
894be886 | 234 | { |
f3ed775e DG |
235 | int ret = 0; |
236 | struct sigaction sa; | |
237 | sigset_t sigset; | |
33a2b854 | 238 | |
f3ed775e DG |
239 | if ((ret = sigemptyset(&sigset)) < 0) { |
240 | perror("sigemptyset"); | |
33a2b854 DG |
241 | goto end; |
242 | } | |
243 | ||
f3ed775e DG |
244 | sa.sa_handler = sighandler; |
245 | sa.sa_mask = sigset; | |
246 | sa.sa_flags = 0; | |
8db8d1dc | 247 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
f3ed775e | 248 | perror("sigaction"); |
96243366 DG |
249 | goto end; |
250 | } | |
251 | ||
f3ed775e DG |
252 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
253 | perror("sigaction"); | |
254 | goto end; | |
894be886 DG |
255 | } |
256 | ||
8db8d1dc DG |
257 | if ((ret = sigaction(SIGCHLD, &sa, NULL)) < 0) { |
258 | perror("sigaction"); | |
259 | goto end; | |
260 | } | |
261 | ||
96243366 | 262 | end: |
57167058 DG |
263 | return ret; |
264 | } | |
265 | ||
fac6795d | 266 | /* |
f3ed775e | 267 | * handle_command |
fac6795d | 268 | * |
f3ed775e DG |
269 | * Handle the full argv list of a first level command. Will find the command |
270 | * in the global commands array and call the function callback associated. | |
1c9f7941 | 271 | * |
f3ed775e DG |
272 | * If command not found, return -1 |
273 | * else, return function command error code. | |
1c9f7941 | 274 | */ |
f3ed775e | 275 | static int handle_command(int argc, char **argv) |
1c9f7941 | 276 | { |
f3ed775e DG |
277 | int i = 0, ret; |
278 | struct cmd_struct *cmd; | |
1c9f7941 | 279 | |
f3ed775e DG |
280 | if (*argv == NULL) { |
281 | ret = CMD_SUCCESS; | |
47b74d63 | 282 | goto end; |
1c9f7941 DG |
283 | } |
284 | ||
f3ed775e DG |
285 | cmd = &commands[i]; |
286 | while (cmd->func != NULL) { | |
287 | /* Find command */ | |
288 | if (strcmp(argv[0], cmd->name) == 0) { | |
289 | ret = cmd->func(argc, (const char**) argv); | |
f3ed775e | 290 | goto end; |
894be886 | 291 | } |
f3ed775e DG |
292 | i++; |
293 | cmd = &commands[i]; | |
894be886 DG |
294 | } |
295 | ||
f3ed775e | 296 | /* Command not found */ |
4ce78777 | 297 | ret = CMD_UNDEFINED; |
894be886 DG |
298 | |
299 | end: | |
f3ed775e | 300 | return ret; |
8548ff30 DG |
301 | } |
302 | ||
5b8719f5 DG |
303 | /* |
304 | * spawn_sessiond | |
305 | * | |
306 | * Spawn a session daemon by forking and execv. | |
307 | */ | |
308 | static int spawn_sessiond(char *pathname) | |
309 | { | |
310 | int ret = 0; | |
311 | pid_t pid; | |
312 | ||
f3ed775e | 313 | MSG("Spawning a session daemon"); |
5a532b68 | 314 | recv_child_signal = 0; |
5b8719f5 DG |
315 | pid = fork(); |
316 | if (pid == 0) { | |
5e16da05 MD |
317 | /* |
318 | * Spawn session daemon and tell | |
5b8719f5 DG |
319 | * it to signal us when ready. |
320 | */ | |
32258573 | 321 | execlp(pathname, "lttng-sessiond", "--sig-parent", "--quiet", NULL); |
5e16da05 MD |
322 | /* execlp only returns if error happened */ |
323 | if (errno == ENOENT) { | |
324 | ERR("No session daemon found. Use --sessiond-path."); | |
325 | } else { | |
326 | perror("execlp"); | |
5b8719f5 | 327 | } |
5a532b68 | 328 | kill(getppid(), SIGTERM); /* wake parent */ |
5e16da05 | 329 | exit(EXIT_FAILURE); |
5b8719f5 | 330 | } else if (pid > 0) { |
8db8d1dc | 331 | sessiond_pid = pid; |
5a532b68 | 332 | /* |
af87c45a DG |
333 | * Wait for lttng-sessiond to start. We need to use a flag to check if |
334 | * the signal has been sent to us, because the child can be scheduled | |
335 | * before the parent, and thus send the signal before this check. In | |
336 | * the signal handler, we set the recv_child_signal flag, so anytime we | |
337 | * check it after the fork is fine. Note that sleep() is interrupted | |
338 | * before the 1 second delay as soon as the signal is received, so it | |
339 | * will not cause visible delay for the user. | |
5a532b68 MD |
340 | */ |
341 | while (!recv_child_signal) { | |
342 | sleep(1); | |
343 | } | |
af87c45a DG |
344 | /* |
345 | * The signal handler will nullify sessiond_pid on SIGCHLD | |
346 | */ | |
8db8d1dc DG |
347 | if (!sessiond_pid) { |
348 | exit(EXIT_FAILURE); | |
349 | } | |
5b8719f5 DG |
350 | goto end; |
351 | } else { | |
352 | perror("fork"); | |
353 | ret = -1; | |
354 | goto end; | |
355 | } | |
356 | ||
357 | end: | |
358 | return ret; | |
359 | } | |
360 | ||
fac6795d | 361 | /* |
f3ed775e | 362 | * check_sessiond |
fac6795d DG |
363 | * |
364 | * Check if the session daemon is available using | |
5b8719f5 DG |
365 | * the liblttngctl API for the check. If not, try to |
366 | * spawn a daemon. | |
fac6795d | 367 | */ |
f3ed775e | 368 | static int check_sessiond(void) |
fac6795d DG |
369 | { |
370 | int ret; | |
b8ec3da8 | 371 | char *pathname = NULL; |
fac6795d | 372 | |
947308c4 DG |
373 | ret = lttng_session_daemon_alive(); |
374 | if (ret == 0) { /* not alive */ | |
5b8719f5 | 375 | /* Try command line option path */ |
b8ec3da8 SM |
376 | pathname = opt_sessiond_path; |
377 | ||
378 | /* Try LTTNG_SESSIOND_PATH env variable */ | |
379 | if (pathname == NULL) { | |
bbccc3d2 | 380 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); |
5b8719f5 DG |
381 | } |
382 | ||
b8ec3da8 | 383 | /* Try with configured path */ |
5b8719f5 | 384 | if (pathname == NULL) { |
b8ec3da8 SM |
385 | if (CONFIG_SESSIOND_BIN[0] != '\0') { |
386 | pathname = CONFIG_SESSIOND_BIN; | |
5b8719f5 | 387 | } |
b8ec3da8 SM |
388 | } |
389 | ||
390 | /* Let's rock and roll while trying the default path */ | |
391 | if (pathname == NULL) { | |
392 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; | |
393 | } | |
394 | ||
395 | DBG("Session daemon at: %s", pathname); | |
396 | ||
397 | /* Check existence and permissions */ | |
398 | ret = access(pathname, F_OK | X_OK); | |
399 | if (ret < 0) { | |
400 | ERR("No such file or access denied: %s", pathname); | |
401 | goto end; | |
5b8719f5 DG |
402 | } |
403 | ||
404 | ret = spawn_sessiond(pathname); | |
5b8719f5 | 405 | if (ret < 0) { |
3183dbb0 | 406 | ERR("Problem occurred when starting %s", pathname); |
5b8719f5 | 407 | } |
c2a79a67 | 408 | } |
5b8719f5 | 409 | end: |
fac6795d DG |
410 | return ret; |
411 | } | |
412 | ||
bcfa8a05 | 413 | /* |
679b4943 SM |
414 | * Check args for specific options that *must* not trigger a session daemon |
415 | * execution. | |
416 | * | |
417 | * Return 1 if match else 0. | |
bcfa8a05 | 418 | */ |
679b4943 | 419 | static int check_args_no_sessiond(int argc, char **argv) |
bcfa8a05 DG |
420 | { |
421 | int i; | |
422 | ||
423 | for (i = 0; i < argc; i++) { | |
ba2926ef MD |
424 | if ((strncmp(argv[i], "-h", sizeof("-h")) == 0) || |
425 | strncmp(argv[i], "--h", sizeof("--h")) == 0 || | |
3183dbb0 | 426 | strncmp(argv[i], "--list-options", sizeof("--list-options")) == 0 || |
4747a49b | 427 | strncmp(argv[i], "--list-commands", sizeof("--list-commands")) == 0 || |
0c95f5b2 DG |
428 | strncmp(argv[i], "version", sizeof("version")) == 0 || |
429 | strncmp(argv[i], "view", sizeof("view")) == 0) { | |
bcfa8a05 DG |
430 | return 1; |
431 | } | |
432 | } | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
5b8719f5 | 437 | /* |
3183dbb0 | 438 | * Parse command line arguments. |
5b8719f5 | 439 | * |
3183dbb0 | 440 | * Return 0 if OK, else -1 |
5b8719f5 | 441 | */ |
f3ed775e | 442 | static int parse_args(int argc, char **argv) |
5b8719f5 | 443 | { |
f3ed775e | 444 | int opt, ret; |
883d80f9 | 445 | char *user; |
5b8719f5 | 446 | |
f3ed775e DG |
447 | if (argc < 2) { |
448 | usage(stderr); | |
449 | clean_exit(EXIT_FAILURE); | |
5b8719f5 DG |
450 | } |
451 | ||
c7e35b03 | 452 | while ((opt = getopt_long(argc, argv, "+Vhnvqg:m:", long_options, NULL)) != -1) { |
f3ed775e | 453 | switch (opt) { |
70318c38 SS |
454 | case 'V': |
455 | version(stdout); | |
456 | ret = 0; | |
457 | goto end; | |
f3ed775e | 458 | case 'h': |
3183dbb0 | 459 | usage(stdout); |
ae856491 | 460 | ret = 0; |
3183dbb0 | 461 | goto end; |
f3ed775e | 462 | case 'v': |
849e5b7b DG |
463 | /* There is only 3 possible level of verbosity. (-vvv) */ |
464 | if (lttng_opt_verbose < 3) { | |
465 | lttng_opt_verbose += 1; | |
466 | } | |
f3ed775e DG |
467 | break; |
468 | case 'q': | |
97e19046 | 469 | lttng_opt_quiet = 1; |
f3ed775e | 470 | break; |
c7e35b03 JR |
471 | case 'm': |
472 | lttng_opt_mi = mi_output_type(optarg); | |
473 | if (lttng_opt_mi < 0) { | |
474 | ret = lttng_opt_mi; | |
475 | goto error; | |
476 | } | |
477 | break; | |
f3ed775e DG |
478 | case 'g': |
479 | lttng_set_tracing_group(optarg); | |
480 | break; | |
8490ae7b | 481 | case 'n': |
f3ed775e DG |
482 | opt_no_sessiond = 1; |
483 | break; | |
484 | case OPT_SESSION_PATH: | |
485 | opt_sessiond_path = strdup(optarg); | |
486 | break; | |
8960e9cd DG |
487 | case OPT_RELAYD_PATH: |
488 | opt_relayd_path = strdup(optarg); | |
489 | break; | |
865abf65 SM |
490 | case OPT_DUMP_OPTIONS: |
491 | list_options(stdout); | |
492 | ret = 0; | |
3183dbb0 | 493 | goto end; |
865abf65 | 494 | case OPT_DUMP_COMMANDS: |
3c9bd23c | 495 | list_commands(commands, stdout); |
865abf65 | 496 | ret = 0; |
3183dbb0 | 497 | goto end; |
f3ed775e DG |
498 | default: |
499 | usage(stderr); | |
ae856491 | 500 | ret = 1; |
f3ed775e DG |
501 | goto error; |
502 | } | |
5b8719f5 | 503 | } |
fac6795d | 504 | |
f3ed775e | 505 | /* If both options are specified, quiet wins */ |
97e19046 DG |
506 | if (lttng_opt_verbose && lttng_opt_quiet) { |
507 | lttng_opt_verbose = 0; | |
5b8719f5 DG |
508 | } |
509 | ||
f3ed775e | 510 | /* Spawn session daemon if needed */ |
679b4943 | 511 | if (opt_no_sessiond == 0 && check_args_no_sessiond(argc, argv) == 0 && |
bcfa8a05 | 512 | (check_sessiond() < 0)) { |
8005f29a | 513 | ret = 1; |
f3ed775e | 514 | goto error; |
5b8719f5 DG |
515 | } |
516 | ||
f3ed775e DG |
517 | /* No leftovers, print usage and quit */ |
518 | if ((argc - optind) == 0) { | |
519 | usage(stderr); | |
8005f29a | 520 | ret = 1; |
f3ed775e DG |
521 | goto error; |
522 | } | |
7442b2ba | 523 | |
883d80f9 DG |
524 | /* For Mathieu Desnoyers a.k.a. Dr. Tracing */ |
525 | user = getenv("USER"); | |
526 | if (user != NULL && ((strncmp(progname, "drtrace", 7) == 0 || | |
527 | strncmp("compudj", user, 7) == 0))) { | |
528 | MSG("%c[%d;%dmWelcome back Dr Tracing!%c[%dm\n", 27,1,33,27,0); | |
529 | } | |
530 | /* Thanks Mathieu */ | |
531 | ||
f3ed775e DG |
532 | /* |
533 | * Handle leftovers which is a first level command with the trailing | |
534 | * options. | |
535 | */ | |
536 | ret = handle_command(argc - optind, argv + optind); | |
ae856491 DG |
537 | switch (ret) { |
538 | case CMD_WARNING: | |
539 | WARN("Some command(s) went wrong"); | |
540 | break; | |
541 | case CMD_ERROR: | |
542 | ERR("Command error"); | |
543 | break; | |
544 | case CMD_UNDEFINED: | |
545 | ERR("Undefined command"); | |
546 | break; | |
547 | case CMD_FATAL: | |
548 | ERR("Fatal error"); | |
549 | break; | |
4ce78777 DG |
550 | case CMD_UNSUPPORTED: |
551 | ERR("Unsupported command"); | |
552 | break; | |
ae856491 DG |
553 | case -1: |
554 | usage(stderr); | |
555 | ret = 1; | |
556 | break; | |
557 | case 0: | |
558 | break; | |
559 | default: | |
42224349 DG |
560 | if (ret < 0) { |
561 | ret = -ret; | |
562 | } | |
ae856491 | 563 | break; |
96243366 DG |
564 | } |
565 | ||
3183dbb0 | 566 | end: |
f3ed775e | 567 | error: |
ae856491 | 568 | return ret; |
fac6795d DG |
569 | } |
570 | ||
f3ed775e | 571 | |
fac6795d | 572 | /* |
5b8719f5 | 573 | * main |
fac6795d DG |
574 | */ |
575 | int main(int argc, char *argv[]) | |
576 | { | |
577 | int ret; | |
578 | ||
579 | progname = argv[0] ? argv[0] : "lttng"; | |
580 | ||
5b8719f5 DG |
581 | ret = set_signal_handler(); |
582 | if (ret < 0) { | |
87378cf5 | 583 | clean_exit(ret); |
5b8719f5 DG |
584 | } |
585 | ||
f3ed775e | 586 | ret = parse_args(argc, argv); |
ae856491 DG |
587 | if (ret != 0) { |
588 | clean_exit(ret); | |
1fff1faa | 589 | } |
87378cf5 | 590 | |
fac6795d DG |
591 | return 0; |
592 | } |