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 | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
fac6795d | 20 | #include <getopt.h> |
f3ed775e | 21 | #include <signal.h> |
fac6795d DG |
22 | #include <stdio.h> |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
8db8d1dc DG |
25 | #include <sys/types.h> |
26 | #include <sys/wait.h> | |
fac6795d | 27 | #include <unistd.h> |
3bd1e081 | 28 | #include <config.h> |
730389d9 | 29 | #include <ctype.h> |
fac6795d | 30 | |
5b97ec60 | 31 | #include <lttng/lttng.h> |
db758600 | 32 | #include <common/error.h> |
fac6795d | 33 | |
c399183f | 34 | #include "command.h" |
fac6795d DG |
35 | |
36 | /* Variables */ | |
37 | static char *progname; | |
f3ed775e DG |
38 | static int opt_no_sessiond; |
39 | static char *opt_sessiond_path; | |
8db8d1dc | 40 | static pid_t sessiond_pid; |
5a532b68 | 41 | static volatile int recv_child_signal; |
f3ed775e | 42 | |
8960e9cd DG |
43 | char *opt_relayd_path; |
44 | ||
f3ed775e | 45 | enum { |
8960e9cd | 46 | OPT_RELAYD_PATH, |
f3ed775e | 47 | OPT_SESSION_PATH, |
865abf65 SM |
48 | OPT_DUMP_OPTIONS, |
49 | OPT_DUMP_COMMANDS, | |
f3ed775e DG |
50 | }; |
51 | ||
52 | /* Getopt options. No first level command. */ | |
53 | static struct option long_options[] = { | |
70318c38 | 54 | {"version", 0, NULL, 'V'}, |
f3ed775e DG |
55 | {"help", 0, NULL, 'h'}, |
56 | {"group", 1, NULL, 'g'}, | |
57 | {"verbose", 0, NULL, 'v'}, | |
58 | {"quiet", 0, NULL, 'q'}, | |
c7e35b03 | 59 | {"mi", 1, NULL, 'm'}, |
8490ae7b | 60 | {"no-sessiond", 0, NULL, 'n'}, |
f3ed775e | 61 | {"sessiond-path", 1, NULL, OPT_SESSION_PATH}, |
8960e9cd | 62 | {"relayd-path", 1, NULL, OPT_RELAYD_PATH}, |
865abf65 SM |
63 | {"list-options", 0, NULL, OPT_DUMP_OPTIONS}, |
64 | {"list-commands", 0, NULL, OPT_DUMP_COMMANDS}, | |
f3ed775e DG |
65 | {NULL, 0, NULL, 0} |
66 | }; | |
67 | ||
68 | /* First level command */ | |
69 | static struct cmd_struct commands[] = { | |
70 | { "list", cmd_list}, | |
71 | { "create", cmd_create}, | |
72 | { "destroy", cmd_destroy}, | |
f3ed775e DG |
73 | { "start", cmd_start}, |
74 | { "stop", cmd_stop}, | |
75 | { "enable-event", cmd_enable_events}, | |
e953ef25 | 76 | { "disable-event", cmd_disable_events}, |
d36b8583 | 77 | { "enable-channel", cmd_enable_channels}, |
26cc6b4e | 78 | { "disable-channel", cmd_disable_channels}, |
d65106b1 | 79 | { "add-context", cmd_add_context}, |
3087ef18 | 80 | { "set-session", cmd_set_session}, |
eb9cb8b7 | 81 | { "version", cmd_version}, |
d0254c7c | 82 | { "calibrate", cmd_calibrate}, |
0c95f5b2 | 83 | { "view", cmd_view}, |
57f272ed | 84 | { "snapshot", cmd_snapshot}, |
c864d6d7 | 85 | { "save", cmd_save}, |
8c42d845 | 86 | { "load", cmd_load}, |
f3ed775e DG |
87 | { NULL, NULL} /* Array closure */ |
88 | }; | |
89 | ||
90 | static void usage(FILE *ofp) | |
8c0faa1d | 91 | { |
4c6ac053 MD |
92 | fprintf(ofp, "LTTng Trace Control " VERSION " - " VERSION_NAME "%s\n\n", |
93 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION); | |
32a6298d | 94 | fprintf(ofp, "usage: lttng [OPTIONS] <COMMAND> [<ARGS>]\n"); |
f3ed775e DG |
95 | fprintf(ofp, "\n"); |
96 | fprintf(ofp, "Options:\n"); | |
70318c38 | 97 | fprintf(ofp, " -V, --version Show version\n"); |
99bab54f TD |
98 | fprintf(ofp, " -h, --help Show this help\n"); |
99 | fprintf(ofp, " --list-options Simple listing of lttng options\n"); | |
100 | fprintf(ofp, " --list-commands Simple listing of lttng commands\n"); | |
101 | fprintf(ofp, " -v, --verbose Increase verbosity\n"); | |
102 | fprintf(ofp, " -q, --quiet Quiet mode\n"); | |
c7e35b03 JR |
103 | fprintf(ofp, " -m, --mi TYPE Machine Interface mode.\n"); |
104 | fprintf(ofp, " Type: xml\n"); | |
99bab54f TD |
105 | fprintf(ofp, " -g, --group NAME Unix tracing group name. (default: tracing)\n"); |
106 | fprintf(ofp, " -n, --no-sessiond Don't spawn a session daemon\n"); | |
107 | fprintf(ofp, " --sessiond-path PATH Session daemon full path\n"); | |
8960e9cd | 108 | fprintf(ofp, " --relayd-path PATH Relayd daemon full path\n"); |
f3ed775e DG |
109 | fprintf(ofp, "\n"); |
110 | fprintf(ofp, "Commands:\n"); | |
00e2e675 DG |
111 | fprintf(ofp, " add-context Add context to event and/or channel\n"); |
112 | fprintf(ofp, " calibrate Quantify LTTng overhead\n"); | |
113 | fprintf(ofp, " create Create tracing session\n"); | |
114 | fprintf(ofp, " destroy Tear down tracing session\n"); | |
115 | fprintf(ofp, " enable-channel Enable tracing channel\n"); | |
116 | fprintf(ofp, " enable-event Enable tracing event\n"); | |
117 | fprintf(ofp, " disable-channel Disable tracing channel\n"); | |
118 | fprintf(ofp, " disable-event Disable tracing event\n"); | |
00e2e675 DG |
119 | fprintf(ofp, " list List possible tracing options\n"); |
120 | fprintf(ofp, " set-session Set current session name\n"); | |
57f272ed | 121 | fprintf(ofp, " snapshot Snapshot buffers of current session name\n"); |
00e2e675 DG |
122 | fprintf(ofp, " start Start tracing\n"); |
123 | fprintf(ofp, " stop Stop tracing\n"); | |
124 | fprintf(ofp, " version Show version information\n"); | |
125 | fprintf(ofp, " view Start trace viewer\n"); | |
c864d6d7 | 126 | fprintf(ofp, " save Save session configuration\n"); |
8c42d845 | 127 | fprintf(ofp, " load Load session configuration\n"); |
f3ed775e | 128 | fprintf(ofp, "\n"); |
99bab54f TD |
129 | fprintf(ofp, "Each command also has its own -h, --help option.\n"); |
130 | fprintf(ofp, "\n"); | |
f3ed775e DG |
131 | fprintf(ofp, "Please see the lttng(1) man page for full documentation.\n"); |
132 | fprintf(ofp, "See http://lttng.org for updates, bug reports and news.\n"); | |
8c0faa1d DG |
133 | } |
134 | ||
70318c38 SS |
135 | static void version(FILE *ofp) |
136 | { | |
4c6ac053 MD |
137 | fprintf(ofp, "%s (LTTng Trace Control) " VERSION" - " VERSION_NAME "%s\n", |
138 | progname, | |
139 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION); | |
70318c38 SS |
140 | } |
141 | ||
c7e35b03 JR |
142 | /* |
143 | * Find the MI output type enum from a string. This function is for the support | |
144 | * of machine interface output. | |
145 | */ | |
146 | static int mi_output_type(const char *output_type) | |
147 | { | |
148 | int ret = 0; | |
149 | ||
150 | if (!strncasecmp("xml", output_type, 3)) { | |
151 | ret = LTTNG_MI_XML; | |
152 | } else { | |
153 | /* Invalid output format */ | |
154 | ERR("MI output format not supported"); | |
155 | ret = -LTTNG_ERR_MI_OUTPUT_TYPE; | |
156 | } | |
157 | ||
158 | return ret; | |
159 | } | |
160 | ||
865abf65 SM |
161 | /* |
162 | * list_options | |
163 | * | |
164 | * List options line by line. This is mostly for bash auto completion and to | |
165 | * avoid difficult parsing. | |
166 | */ | |
167 | static void list_options(FILE *ofp) | |
168 | { | |
169 | int i = 0; | |
170 | struct option *option = NULL; | |
171 | ||
172 | option = &long_options[i]; | |
173 | while (option->name != NULL) { | |
174 | fprintf(ofp, "--%s\n", option->name); | |
175 | ||
176 | if (isprint(option->val)) { | |
177 | fprintf(ofp, "-%c\n", option->val); | |
178 | } | |
179 | ||
180 | i++; | |
181 | option = &long_options[i]; | |
182 | } | |
183 | } | |
184 | ||
7442b2ba | 185 | /* |
f3ed775e | 186 | * clean_exit |
96243366 | 187 | */ |
f3ed775e | 188 | static void clean_exit(int code) |
96243366 | 189 | { |
f3ed775e DG |
190 | DBG("Clean exit"); |
191 | exit(code); | |
894be886 | 192 | } |
96243366 | 193 | |
894be886 | 194 | /* |
f3ed775e | 195 | * sighandler |
2ef84c95 | 196 | * |
f3ed775e | 197 | * Signal handler for the daemon |
2ef84c95 | 198 | */ |
f3ed775e | 199 | static void sighandler(int sig) |
2ef84c95 | 200 | { |
8db8d1dc DG |
201 | int status; |
202 | ||
f3ed775e DG |
203 | switch (sig) { |
204 | case SIGTERM: | |
99bab54f | 205 | DBG("SIGTERM caught"); |
f3ed775e DG |
206 | clean_exit(EXIT_FAILURE); |
207 | break; | |
208 | case SIGCHLD: | |
99bab54f | 209 | DBG("SIGCHLD caught"); |
8db8d1dc | 210 | waitpid(sessiond_pid, &status, 0); |
5a532b68 | 211 | recv_child_signal = 1; |
8db8d1dc DG |
212 | /* Indicate that the session daemon died */ |
213 | sessiond_pid = 0; | |
214 | ERR("Session daemon died (exit status %d)", WEXITSTATUS(status)); | |
215 | break; | |
216 | case SIGUSR1: | |
217 | /* Notify is done */ | |
5a532b68 | 218 | recv_child_signal = 1; |
99bab54f | 219 | DBG("SIGUSR1 caught"); |
f3ed775e DG |
220 | break; |
221 | default: | |
99bab54f | 222 | DBG("Unknown signal %d caught", sig); |
f3ed775e | 223 | break; |
2ef84c95 DG |
224 | } |
225 | ||
f3ed775e | 226 | return; |
2ef84c95 DG |
227 | } |
228 | ||
229 | /* | |
f3ed775e | 230 | * set_signal_handler |
894be886 | 231 | * |
f3ed775e | 232 | * Setup signal handler for SIGCHLD and SIGTERM. |
894be886 | 233 | */ |
f3ed775e | 234 | static int set_signal_handler(void) |
894be886 | 235 | { |
f3ed775e DG |
236 | int ret = 0; |
237 | struct sigaction sa; | |
238 | sigset_t sigset; | |
33a2b854 | 239 | |
f3ed775e DG |
240 | if ((ret = sigemptyset(&sigset)) < 0) { |
241 | perror("sigemptyset"); | |
33a2b854 DG |
242 | goto end; |
243 | } | |
244 | ||
f3ed775e DG |
245 | sa.sa_handler = sighandler; |
246 | sa.sa_mask = sigset; | |
247 | sa.sa_flags = 0; | |
8db8d1dc | 248 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
f3ed775e | 249 | perror("sigaction"); |
96243366 DG |
250 | goto end; |
251 | } | |
252 | ||
f3ed775e DG |
253 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
254 | perror("sigaction"); | |
255 | goto end; | |
894be886 DG |
256 | } |
257 | ||
8db8d1dc DG |
258 | if ((ret = sigaction(SIGCHLD, &sa, NULL)) < 0) { |
259 | perror("sigaction"); | |
260 | goto end; | |
261 | } | |
262 | ||
96243366 | 263 | end: |
57167058 DG |
264 | return ret; |
265 | } | |
266 | ||
fac6795d | 267 | /* |
f3ed775e | 268 | * handle_command |
fac6795d | 269 | * |
f3ed775e DG |
270 | * Handle the full argv list of a first level command. Will find the command |
271 | * in the global commands array and call the function callback associated. | |
1c9f7941 | 272 | * |
f3ed775e DG |
273 | * If command not found, return -1 |
274 | * else, return function command error code. | |
1c9f7941 | 275 | */ |
f3ed775e | 276 | static int handle_command(int argc, char **argv) |
1c9f7941 | 277 | { |
f3ed775e DG |
278 | int i = 0, ret; |
279 | struct cmd_struct *cmd; | |
1c9f7941 | 280 | |
f3ed775e DG |
281 | if (*argv == NULL) { |
282 | ret = CMD_SUCCESS; | |
47b74d63 | 283 | goto end; |
1c9f7941 DG |
284 | } |
285 | ||
f3ed775e DG |
286 | cmd = &commands[i]; |
287 | while (cmd->func != NULL) { | |
288 | /* Find command */ | |
289 | if (strcmp(argv[0], cmd->name) == 0) { | |
290 | ret = cmd->func(argc, (const char**) argv); | |
f3ed775e | 291 | goto end; |
894be886 | 292 | } |
f3ed775e DG |
293 | i++; |
294 | cmd = &commands[i]; | |
894be886 DG |
295 | } |
296 | ||
f3ed775e | 297 | /* Command not found */ |
4ce78777 | 298 | ret = CMD_UNDEFINED; |
894be886 DG |
299 | |
300 | end: | |
f3ed775e | 301 | return ret; |
8548ff30 DG |
302 | } |
303 | ||
5b8719f5 DG |
304 | /* |
305 | * spawn_sessiond | |
306 | * | |
307 | * Spawn a session daemon by forking and execv. | |
308 | */ | |
309 | static int spawn_sessiond(char *pathname) | |
310 | { | |
311 | int ret = 0; | |
312 | pid_t pid; | |
313 | ||
f3ed775e | 314 | MSG("Spawning a session daemon"); |
5a532b68 | 315 | recv_child_signal = 0; |
5b8719f5 DG |
316 | pid = fork(); |
317 | if (pid == 0) { | |
5e16da05 MD |
318 | /* |
319 | * Spawn session daemon and tell | |
5b8719f5 DG |
320 | * it to signal us when ready. |
321 | */ | |
32258573 | 322 | execlp(pathname, "lttng-sessiond", "--sig-parent", "--quiet", NULL); |
5e16da05 MD |
323 | /* execlp only returns if error happened */ |
324 | if (errno == ENOENT) { | |
325 | ERR("No session daemon found. Use --sessiond-path."); | |
326 | } else { | |
327 | perror("execlp"); | |
5b8719f5 | 328 | } |
5a532b68 | 329 | kill(getppid(), SIGTERM); /* wake parent */ |
5e16da05 | 330 | exit(EXIT_FAILURE); |
5b8719f5 | 331 | } else if (pid > 0) { |
8db8d1dc | 332 | sessiond_pid = pid; |
5a532b68 | 333 | /* |
af87c45a DG |
334 | * Wait for lttng-sessiond to start. We need to use a flag to check if |
335 | * the signal has been sent to us, because the child can be scheduled | |
336 | * before the parent, and thus send the signal before this check. In | |
337 | * the signal handler, we set the recv_child_signal flag, so anytime we | |
338 | * check it after the fork is fine. Note that sleep() is interrupted | |
339 | * before the 1 second delay as soon as the signal is received, so it | |
340 | * will not cause visible delay for the user. | |
5a532b68 MD |
341 | */ |
342 | while (!recv_child_signal) { | |
343 | sleep(1); | |
344 | } | |
af87c45a DG |
345 | /* |
346 | * The signal handler will nullify sessiond_pid on SIGCHLD | |
347 | */ | |
8db8d1dc DG |
348 | if (!sessiond_pid) { |
349 | exit(EXIT_FAILURE); | |
350 | } | |
5b8719f5 DG |
351 | goto end; |
352 | } else { | |
353 | perror("fork"); | |
354 | ret = -1; | |
355 | goto end; | |
356 | } | |
357 | ||
358 | end: | |
359 | return ret; | |
360 | } | |
361 | ||
fac6795d | 362 | /* |
f3ed775e | 363 | * check_sessiond |
fac6795d DG |
364 | * |
365 | * Check if the session daemon is available using | |
5b8719f5 DG |
366 | * the liblttngctl API for the check. If not, try to |
367 | * spawn a daemon. | |
fac6795d | 368 | */ |
f3ed775e | 369 | static int check_sessiond(void) |
fac6795d DG |
370 | { |
371 | int ret; | |
b8ec3da8 | 372 | char *pathname = NULL; |
fac6795d | 373 | |
947308c4 DG |
374 | ret = lttng_session_daemon_alive(); |
375 | if (ret == 0) { /* not alive */ | |
5b8719f5 | 376 | /* Try command line option path */ |
b8ec3da8 SM |
377 | pathname = opt_sessiond_path; |
378 | ||
379 | /* Try LTTNG_SESSIOND_PATH env variable */ | |
380 | if (pathname == NULL) { | |
bbccc3d2 | 381 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); |
5b8719f5 DG |
382 | } |
383 | ||
b8ec3da8 | 384 | /* Try with configured path */ |
5b8719f5 | 385 | if (pathname == NULL) { |
b8ec3da8 SM |
386 | if (CONFIG_SESSIOND_BIN[0] != '\0') { |
387 | pathname = CONFIG_SESSIOND_BIN; | |
5b8719f5 | 388 | } |
b8ec3da8 SM |
389 | } |
390 | ||
391 | /* Let's rock and roll while trying the default path */ | |
392 | if (pathname == NULL) { | |
393 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; | |
394 | } | |
395 | ||
396 | DBG("Session daemon at: %s", pathname); | |
397 | ||
398 | /* Check existence and permissions */ | |
399 | ret = access(pathname, F_OK | X_OK); | |
400 | if (ret < 0) { | |
401 | ERR("No such file or access denied: %s", pathname); | |
402 | goto end; | |
5b8719f5 DG |
403 | } |
404 | ||
405 | ret = spawn_sessiond(pathname); | |
5b8719f5 | 406 | if (ret < 0) { |
3183dbb0 | 407 | ERR("Problem occurred when starting %s", pathname); |
5b8719f5 | 408 | } |
c2a79a67 | 409 | } |
5b8719f5 | 410 | end: |
fac6795d DG |
411 | return ret; |
412 | } | |
413 | ||
bcfa8a05 | 414 | /* |
679b4943 SM |
415 | * Check args for specific options that *must* not trigger a session daemon |
416 | * execution. | |
417 | * | |
418 | * Return 1 if match else 0. | |
bcfa8a05 | 419 | */ |
679b4943 | 420 | static int check_args_no_sessiond(int argc, char **argv) |
bcfa8a05 DG |
421 | { |
422 | int i; | |
423 | ||
424 | for (i = 0; i < argc; i++) { | |
ba2926ef MD |
425 | if ((strncmp(argv[i], "-h", sizeof("-h")) == 0) || |
426 | strncmp(argv[i], "--h", sizeof("--h")) == 0 || | |
3183dbb0 | 427 | strncmp(argv[i], "--list-options", sizeof("--list-options")) == 0 || |
4747a49b | 428 | strncmp(argv[i], "--list-commands", sizeof("--list-commands")) == 0 || |
0c95f5b2 DG |
429 | strncmp(argv[i], "version", sizeof("version")) == 0 || |
430 | strncmp(argv[i], "view", sizeof("view")) == 0) { | |
bcfa8a05 DG |
431 | return 1; |
432 | } | |
433 | } | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
5b8719f5 | 438 | /* |
3183dbb0 | 439 | * Parse command line arguments. |
5b8719f5 | 440 | * |
3183dbb0 | 441 | * Return 0 if OK, else -1 |
5b8719f5 | 442 | */ |
f3ed775e | 443 | static int parse_args(int argc, char **argv) |
5b8719f5 | 444 | { |
f3ed775e | 445 | int opt, ret; |
883d80f9 | 446 | char *user; |
5b8719f5 | 447 | |
f3ed775e DG |
448 | if (argc < 2) { |
449 | usage(stderr); | |
450 | clean_exit(EXIT_FAILURE); | |
5b8719f5 DG |
451 | } |
452 | ||
c7e35b03 | 453 | while ((opt = getopt_long(argc, argv, "+Vhnvqg:m:", long_options, NULL)) != -1) { |
f3ed775e | 454 | switch (opt) { |
70318c38 SS |
455 | case 'V': |
456 | version(stdout); | |
457 | ret = 0; | |
458 | goto end; | |
f3ed775e | 459 | case 'h': |
3183dbb0 | 460 | usage(stdout); |
ae856491 | 461 | ret = 0; |
3183dbb0 | 462 | goto end; |
f3ed775e | 463 | case 'v': |
849e5b7b DG |
464 | /* There is only 3 possible level of verbosity. (-vvv) */ |
465 | if (lttng_opt_verbose < 3) { | |
466 | lttng_opt_verbose += 1; | |
467 | } | |
f3ed775e DG |
468 | break; |
469 | case 'q': | |
97e19046 | 470 | lttng_opt_quiet = 1; |
f3ed775e | 471 | break; |
c7e35b03 JR |
472 | case 'm': |
473 | lttng_opt_mi = mi_output_type(optarg); | |
474 | if (lttng_opt_mi < 0) { | |
475 | ret = lttng_opt_mi; | |
476 | goto error; | |
477 | } | |
478 | break; | |
f3ed775e DG |
479 | case 'g': |
480 | lttng_set_tracing_group(optarg); | |
481 | break; | |
8490ae7b | 482 | case 'n': |
f3ed775e DG |
483 | opt_no_sessiond = 1; |
484 | break; | |
485 | case OPT_SESSION_PATH: | |
486 | opt_sessiond_path = strdup(optarg); | |
487 | break; | |
8960e9cd DG |
488 | case OPT_RELAYD_PATH: |
489 | opt_relayd_path = strdup(optarg); | |
490 | break; | |
865abf65 SM |
491 | case OPT_DUMP_OPTIONS: |
492 | list_options(stdout); | |
493 | ret = 0; | |
3183dbb0 | 494 | goto end; |
865abf65 | 495 | case OPT_DUMP_COMMANDS: |
3c9bd23c | 496 | list_commands(commands, stdout); |
865abf65 | 497 | ret = 0; |
3183dbb0 | 498 | goto end; |
f3ed775e DG |
499 | default: |
500 | usage(stderr); | |
ae856491 | 501 | ret = 1; |
f3ed775e DG |
502 | goto error; |
503 | } | |
5b8719f5 | 504 | } |
fac6795d | 505 | |
f3ed775e | 506 | /* If both options are specified, quiet wins */ |
97e19046 DG |
507 | if (lttng_opt_verbose && lttng_opt_quiet) { |
508 | lttng_opt_verbose = 0; | |
5b8719f5 DG |
509 | } |
510 | ||
f3ed775e | 511 | /* Spawn session daemon if needed */ |
679b4943 | 512 | if (opt_no_sessiond == 0 && check_args_no_sessiond(argc, argv) == 0 && |
bcfa8a05 | 513 | (check_sessiond() < 0)) { |
8005f29a | 514 | ret = 1; |
f3ed775e | 515 | goto error; |
5b8719f5 DG |
516 | } |
517 | ||
f3ed775e DG |
518 | /* No leftovers, print usage and quit */ |
519 | if ((argc - optind) == 0) { | |
520 | usage(stderr); | |
8005f29a | 521 | ret = 1; |
f3ed775e DG |
522 | goto error; |
523 | } | |
7442b2ba | 524 | |
883d80f9 DG |
525 | /* For Mathieu Desnoyers a.k.a. Dr. Tracing */ |
526 | user = getenv("USER"); | |
527 | if (user != NULL && ((strncmp(progname, "drtrace", 7) == 0 || | |
528 | strncmp("compudj", user, 7) == 0))) { | |
529 | MSG("%c[%d;%dmWelcome back Dr Tracing!%c[%dm\n", 27,1,33,27,0); | |
530 | } | |
531 | /* Thanks Mathieu */ | |
532 | ||
f3ed775e DG |
533 | /* |
534 | * Handle leftovers which is a first level command with the trailing | |
535 | * options. | |
536 | */ | |
537 | ret = handle_command(argc - optind, argv + optind); | |
ae856491 DG |
538 | switch (ret) { |
539 | case CMD_WARNING: | |
540 | WARN("Some command(s) went wrong"); | |
541 | break; | |
542 | case CMD_ERROR: | |
543 | ERR("Command error"); | |
544 | break; | |
545 | case CMD_UNDEFINED: | |
546 | ERR("Undefined command"); | |
547 | break; | |
548 | case CMD_FATAL: | |
549 | ERR("Fatal error"); | |
550 | break; | |
4ce78777 DG |
551 | case CMD_UNSUPPORTED: |
552 | ERR("Unsupported command"); | |
553 | break; | |
ae856491 DG |
554 | case -1: |
555 | usage(stderr); | |
556 | ret = 1; | |
557 | break; | |
558 | case 0: | |
559 | break; | |
560 | default: | |
42224349 DG |
561 | if (ret < 0) { |
562 | ret = -ret; | |
563 | } | |
ae856491 | 564 | break; |
96243366 DG |
565 | } |
566 | ||
3183dbb0 | 567 | end: |
f3ed775e | 568 | error: |
ae856491 | 569 | return ret; |
fac6795d DG |
570 | } |
571 | ||
f3ed775e | 572 | |
fac6795d | 573 | /* |
5b8719f5 | 574 | * main |
fac6795d DG |
575 | */ |
576 | int main(int argc, char *argv[]) | |
577 | { | |
578 | int ret; | |
579 | ||
580 | progname = argv[0] ? argv[0] : "lttng"; | |
581 | ||
5b8719f5 DG |
582 | ret = set_signal_handler(); |
583 | if (ret < 0) { | |
87378cf5 | 584 | clean_exit(ret); |
5b8719f5 DG |
585 | } |
586 | ||
f3ed775e | 587 | ret = parse_args(argc, argv); |
ae856491 DG |
588 | if (ret != 0) { |
589 | clean_exit(ret); | |
1fff1faa | 590 | } |
87378cf5 | 591 | |
fac6795d DG |
592 | return 0; |
593 | } |