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 | ||
6c1c0768 | 18 | #define _LGPL_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> |
730389d9 | 27 | #include <ctype.h> |
fac6795d | 28 | |
5b97ec60 | 29 | #include <lttng/lttng.h> |
db758600 | 30 | #include <common/error.h> |
e8fa9fb0 | 31 | #include <common/compat/getenv.h> |
fac6795d | 32 | |
c399183f | 33 | #include "command.h" |
fac6795d DG |
34 | |
35 | /* Variables */ | |
36 | static char *progname; | |
92360082 JG |
37 | int opt_no_sessiond; |
38 | char *opt_sessiond_path; | |
f3ed775e | 39 | |
8960e9cd DG |
40 | char *opt_relayd_path; |
41 | ||
f3ed775e | 42 | enum { |
8960e9cd | 43 | OPT_RELAYD_PATH, |
f3ed775e | 44 | OPT_SESSION_PATH, |
865abf65 SM |
45 | OPT_DUMP_OPTIONS, |
46 | OPT_DUMP_COMMANDS, | |
f3ed775e DG |
47 | }; |
48 | ||
49 | /* Getopt options. No first level command. */ | |
50 | static struct option long_options[] = { | |
70318c38 | 51 | {"version", 0, NULL, 'V'}, |
f3ed775e DG |
52 | {"help", 0, NULL, 'h'}, |
53 | {"group", 1, NULL, 'g'}, | |
54 | {"verbose", 0, NULL, 'v'}, | |
55 | {"quiet", 0, NULL, 'q'}, | |
c7e35b03 | 56 | {"mi", 1, NULL, 'm'}, |
8490ae7b | 57 | {"no-sessiond", 0, NULL, 'n'}, |
f3ed775e | 58 | {"sessiond-path", 1, NULL, OPT_SESSION_PATH}, |
8960e9cd | 59 | {"relayd-path", 1, NULL, OPT_RELAYD_PATH}, |
865abf65 SM |
60 | {"list-options", 0, NULL, OPT_DUMP_OPTIONS}, |
61 | {"list-commands", 0, NULL, OPT_DUMP_COMMANDS}, | |
f3ed775e DG |
62 | {NULL, 0, NULL, 0} |
63 | }; | |
64 | ||
65 | /* First level command */ | |
66 | static struct cmd_struct commands[] = { | |
67 | { "list", cmd_list}, | |
54a0adbf | 68 | { "status", cmd_status}, |
f3ed775e DG |
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}, |
8c42d845 | 84 | { "load", cmd_load}, |
ccf10263 MD |
85 | { "track", cmd_track}, |
86 | { "untrack", cmd_untrack}, | |
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 | 122 | fprintf(ofp, " start Start tracing\n"); |
54a0adbf | 123 | fprintf(ofp, " status Show current session's details\n"); |
00e2e675 DG |
124 | fprintf(ofp, " stop Stop tracing\n"); |
125 | fprintf(ofp, " version Show version information\n"); | |
126 | fprintf(ofp, " view Start trace viewer\n"); | |
c864d6d7 | 127 | fprintf(ofp, " save Save session configuration\n"); |
8c42d845 | 128 | fprintf(ofp, " load Load session configuration\n"); |
ccf10263 MD |
129 | fprintf(ofp, " track Track specific system resources\n"); |
130 | fprintf(ofp, " untrack Untrack specific system resources\n"); | |
f3ed775e | 131 | fprintf(ofp, "\n"); |
99bab54f TD |
132 | fprintf(ofp, "Each command also has its own -h, --help option.\n"); |
133 | fprintf(ofp, "\n"); | |
f3ed775e DG |
134 | fprintf(ofp, "Please see the lttng(1) man page for full documentation.\n"); |
135 | fprintf(ofp, "See http://lttng.org for updates, bug reports and news.\n"); | |
8c0faa1d DG |
136 | } |
137 | ||
70318c38 SS |
138 | static void version(FILE *ofp) |
139 | { | |
4c6ac053 MD |
140 | fprintf(ofp, "%s (LTTng Trace Control) " VERSION" - " VERSION_NAME "%s\n", |
141 | progname, | |
142 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION); | |
70318c38 SS |
143 | } |
144 | ||
c7e35b03 JR |
145 | /* |
146 | * Find the MI output type enum from a string. This function is for the support | |
147 | * of machine interface output. | |
148 | */ | |
149 | static int mi_output_type(const char *output_type) | |
150 | { | |
151 | int ret = 0; | |
152 | ||
153 | if (!strncasecmp("xml", output_type, 3)) { | |
154 | ret = LTTNG_MI_XML; | |
155 | } else { | |
156 | /* Invalid output format */ | |
157 | ERR("MI output format not supported"); | |
158 | ret = -LTTNG_ERR_MI_OUTPUT_TYPE; | |
159 | } | |
160 | ||
161 | return ret; | |
162 | } | |
163 | ||
865abf65 SM |
164 | /* |
165 | * list_options | |
166 | * | |
167 | * List options line by line. This is mostly for bash auto completion and to | |
168 | * avoid difficult parsing. | |
169 | */ | |
170 | static void list_options(FILE *ofp) | |
171 | { | |
172 | int i = 0; | |
173 | struct option *option = NULL; | |
174 | ||
175 | option = &long_options[i]; | |
176 | while (option->name != NULL) { | |
177 | fprintf(ofp, "--%s\n", option->name); | |
178 | ||
179 | if (isprint(option->val)) { | |
180 | fprintf(ofp, "-%c\n", option->val); | |
181 | } | |
182 | ||
183 | i++; | |
184 | option = &long_options[i]; | |
185 | } | |
186 | } | |
187 | ||
7442b2ba | 188 | /* |
f3ed775e | 189 | * clean_exit |
96243366 | 190 | */ |
f3ed775e | 191 | static void clean_exit(int code) |
96243366 | 192 | { |
f3ed775e DG |
193 | DBG("Clean exit"); |
194 | exit(code); | |
894be886 | 195 | } |
96243366 | 196 | |
894be886 | 197 | /* |
f3ed775e | 198 | * sighandler |
2ef84c95 | 199 | * |
f3ed775e | 200 | * Signal handler for the daemon |
2ef84c95 | 201 | */ |
f3ed775e | 202 | static void sighandler(int sig) |
2ef84c95 | 203 | { |
f3ed775e DG |
204 | switch (sig) { |
205 | case SIGTERM: | |
99bab54f | 206 | DBG("SIGTERM caught"); |
f3ed775e DG |
207 | clean_exit(EXIT_FAILURE); |
208 | break; | |
f3ed775e | 209 | default: |
99bab54f | 210 | DBG("Unknown signal %d caught", sig); |
f3ed775e | 211 | break; |
2ef84c95 DG |
212 | } |
213 | ||
f3ed775e | 214 | return; |
2ef84c95 DG |
215 | } |
216 | ||
217 | /* | |
f3ed775e | 218 | * set_signal_handler |
894be886 | 219 | * |
f3ed775e | 220 | * Setup signal handler for SIGCHLD and SIGTERM. |
894be886 | 221 | */ |
f3ed775e | 222 | static int set_signal_handler(void) |
894be886 | 223 | { |
f3ed775e DG |
224 | int ret = 0; |
225 | struct sigaction sa; | |
226 | sigset_t sigset; | |
33a2b854 | 227 | |
f3ed775e | 228 | if ((ret = sigemptyset(&sigset)) < 0) { |
6f04ed72 | 229 | PERROR("sigemptyset"); |
33a2b854 DG |
230 | goto end; |
231 | } | |
232 | ||
f3ed775e DG |
233 | sa.sa_handler = sighandler; |
234 | sa.sa_mask = sigset; | |
235 | sa.sa_flags = 0; | |
96243366 | 236 | |
f3ed775e | 237 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
6f04ed72 | 238 | PERROR("sigaction"); |
f3ed775e | 239 | goto end; |
894be886 DG |
240 | } |
241 | ||
96243366 | 242 | end: |
57167058 DG |
243 | return ret; |
244 | } | |
245 | ||
fac6795d | 246 | /* |
f3ed775e | 247 | * handle_command |
fac6795d | 248 | * |
f3ed775e DG |
249 | * Handle the full argv list of a first level command. Will find the command |
250 | * in the global commands array and call the function callback associated. | |
1c9f7941 | 251 | * |
f3ed775e DG |
252 | * If command not found, return -1 |
253 | * else, return function command error code. | |
1c9f7941 | 254 | */ |
f3ed775e | 255 | static int handle_command(int argc, char **argv) |
1c9f7941 | 256 | { |
f3ed775e DG |
257 | int i = 0, ret; |
258 | struct cmd_struct *cmd; | |
1c9f7941 | 259 | |
f3ed775e DG |
260 | if (*argv == NULL) { |
261 | ret = CMD_SUCCESS; | |
47b74d63 | 262 | goto end; |
1c9f7941 DG |
263 | } |
264 | ||
f3ed775e DG |
265 | cmd = &commands[i]; |
266 | while (cmd->func != NULL) { | |
267 | /* Find command */ | |
268 | if (strcmp(argv[0], cmd->name) == 0) { | |
269 | ret = cmd->func(argc, (const char**) argv); | |
f3ed775e | 270 | goto end; |
894be886 | 271 | } |
f3ed775e DG |
272 | i++; |
273 | cmd = &commands[i]; | |
894be886 DG |
274 | } |
275 | ||
f3ed775e | 276 | /* Command not found */ |
4ce78777 | 277 | ret = CMD_UNDEFINED; |
894be886 DG |
278 | |
279 | end: | |
f3ed775e | 280 | return ret; |
8548ff30 DG |
281 | } |
282 | ||
5b8719f5 | 283 | /* |
3183dbb0 | 284 | * Parse command line arguments. |
5b8719f5 | 285 | * |
3183dbb0 | 286 | * Return 0 if OK, else -1 |
5b8719f5 | 287 | */ |
f3ed775e | 288 | static int parse_args(int argc, char **argv) |
5b8719f5 | 289 | { |
f3ed775e | 290 | int opt, ret; |
883d80f9 | 291 | char *user; |
5b8719f5 | 292 | |
e8fa9fb0 MD |
293 | if (lttng_is_setuid_setgid()) { |
294 | ERR("'%s' is not allowed to be executed as a setuid/setgid binary for security reasons. Aborting.", argv[0]); | |
295 | clean_exit(EXIT_FAILURE); | |
296 | } | |
297 | ||
f3ed775e DG |
298 | if (argc < 2) { |
299 | usage(stderr); | |
300 | clean_exit(EXIT_FAILURE); | |
5b8719f5 DG |
301 | } |
302 | ||
c7e35b03 | 303 | while ((opt = getopt_long(argc, argv, "+Vhnvqg:m:", long_options, NULL)) != -1) { |
f3ed775e | 304 | switch (opt) { |
70318c38 SS |
305 | case 'V': |
306 | version(stdout); | |
307 | ret = 0; | |
308 | goto end; | |
f3ed775e | 309 | case 'h': |
3183dbb0 | 310 | usage(stdout); |
ae856491 | 311 | ret = 0; |
3183dbb0 | 312 | goto end; |
f3ed775e | 313 | case 'v': |
849e5b7b DG |
314 | /* There is only 3 possible level of verbosity. (-vvv) */ |
315 | if (lttng_opt_verbose < 3) { | |
316 | lttng_opt_verbose += 1; | |
317 | } | |
f3ed775e DG |
318 | break; |
319 | case 'q': | |
97e19046 | 320 | lttng_opt_quiet = 1; |
f3ed775e | 321 | break; |
c7e35b03 JR |
322 | case 'm': |
323 | lttng_opt_mi = mi_output_type(optarg); | |
324 | if (lttng_opt_mi < 0) { | |
325 | ret = lttng_opt_mi; | |
326 | goto error; | |
327 | } | |
328 | break; | |
f3ed775e DG |
329 | case 'g': |
330 | lttng_set_tracing_group(optarg); | |
331 | break; | |
8490ae7b | 332 | case 'n': |
f3ed775e DG |
333 | opt_no_sessiond = 1; |
334 | break; | |
335 | case OPT_SESSION_PATH: | |
336 | opt_sessiond_path = strdup(optarg); | |
d7c5d39f MD |
337 | if (!opt_sessiond_path) { |
338 | ret = -1; | |
339 | goto error; | |
340 | } | |
f3ed775e | 341 | break; |
8960e9cd DG |
342 | case OPT_RELAYD_PATH: |
343 | opt_relayd_path = strdup(optarg); | |
d7c5d39f MD |
344 | if (!opt_relayd_path) { |
345 | ret = -1; | |
346 | goto error; | |
347 | } | |
8960e9cd | 348 | break; |
865abf65 SM |
349 | case OPT_DUMP_OPTIONS: |
350 | list_options(stdout); | |
351 | ret = 0; | |
3183dbb0 | 352 | goto end; |
865abf65 | 353 | case OPT_DUMP_COMMANDS: |
3c9bd23c | 354 | list_commands(commands, stdout); |
865abf65 | 355 | ret = 0; |
3183dbb0 | 356 | goto end; |
f3ed775e DG |
357 | default: |
358 | usage(stderr); | |
ae856491 | 359 | ret = 1; |
f3ed775e DG |
360 | goto error; |
361 | } | |
5b8719f5 | 362 | } |
fac6795d | 363 | |
f3ed775e | 364 | /* If both options are specified, quiet wins */ |
97e19046 DG |
365 | if (lttng_opt_verbose && lttng_opt_quiet) { |
366 | lttng_opt_verbose = 0; | |
5b8719f5 DG |
367 | } |
368 | ||
f3ed775e DG |
369 | /* No leftovers, print usage and quit */ |
370 | if ((argc - optind) == 0) { | |
371 | usage(stderr); | |
8005f29a | 372 | ret = 1; |
f3ed775e DG |
373 | goto error; |
374 | } | |
7442b2ba | 375 | |
883d80f9 DG |
376 | /* For Mathieu Desnoyers a.k.a. Dr. Tracing */ |
377 | user = getenv("USER"); | |
378 | if (user != NULL && ((strncmp(progname, "drtrace", 7) == 0 || | |
379 | strncmp("compudj", user, 7) == 0))) { | |
380 | MSG("%c[%d;%dmWelcome back Dr Tracing!%c[%dm\n", 27,1,33,27,0); | |
381 | } | |
382 | /* Thanks Mathieu */ | |
383 | ||
92360082 | 384 | /* |
f3ed775e DG |
385 | * Handle leftovers which is a first level command with the trailing |
386 | * options. | |
387 | */ | |
388 | ret = handle_command(argc - optind, argv + optind); | |
ae856491 DG |
389 | switch (ret) { |
390 | case CMD_WARNING: | |
391 | WARN("Some command(s) went wrong"); | |
392 | break; | |
393 | case CMD_ERROR: | |
394 | ERR("Command error"); | |
395 | break; | |
396 | case CMD_UNDEFINED: | |
397 | ERR("Undefined command"); | |
398 | break; | |
399 | case CMD_FATAL: | |
400 | ERR("Fatal error"); | |
401 | break; | |
4ce78777 DG |
402 | case CMD_UNSUPPORTED: |
403 | ERR("Unsupported command"); | |
404 | break; | |
ae856491 DG |
405 | case -1: |
406 | usage(stderr); | |
407 | ret = 1; | |
408 | break; | |
409 | case 0: | |
410 | break; | |
411 | default: | |
42224349 DG |
412 | if (ret < 0) { |
413 | ret = -ret; | |
414 | } | |
ae856491 | 415 | break; |
96243366 DG |
416 | } |
417 | ||
3183dbb0 | 418 | end: |
f3ed775e | 419 | error: |
ae856491 | 420 | return ret; |
fac6795d DG |
421 | } |
422 | ||
f3ed775e | 423 | |
fac6795d | 424 | /* |
5b8719f5 | 425 | * main |
fac6795d DG |
426 | */ |
427 | int main(int argc, char *argv[]) | |
428 | { | |
429 | int ret; | |
430 | ||
431 | progname = argv[0] ? argv[0] : "lttng"; | |
432 | ||
5b8719f5 DG |
433 | ret = set_signal_handler(); |
434 | if (ret < 0) { | |
87378cf5 | 435 | clean_exit(ret); |
5b8719f5 DG |
436 | } |
437 | ||
f3ed775e | 438 | ret = parse_args(argc, argv); |
ae856491 DG |
439 | if (ret != 0) { |
440 | clean_exit(ret); | |
1fff1faa | 441 | } |
87378cf5 | 442 | |
fac6795d DG |
443 | return 0; |
444 | } |