Commit | Line | Data |
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f3ed775e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
f3ed775e 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 | * | |
d14d33bf AM |
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. | |
f3ed775e DG |
16 | */ |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
f3ed775e DG |
19 | #include <popt.h> |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/types.h> | |
25 | #include <unistd.h> | |
26 | ||
c399183f | 27 | #include "../command.h" |
f3ed775e | 28 | |
65f25c66 | 29 | #include <common/mi-lttng.h> |
42224349 | 30 | #include <common/sessiond-comm/sessiond-comm.h> |
1dac0189 | 31 | #include <common/utils.h> |
42224349 | 32 | |
fd076c09 | 33 | static char *opt_session_name; |
b09ee5ba | 34 | static int opt_destroy_all; |
e20ee7c2 | 35 | static int opt_no_wait; |
f3ed775e | 36 | |
65f25c66 JRJ |
37 | /* Mi writer */ |
38 | static struct mi_writer *writer; | |
39 | ||
f3ed775e DG |
40 | enum { |
41 | OPT_HELP = 1, | |
679b4943 | 42 | OPT_LIST_OPTIONS, |
f3ed775e DG |
43 | }; |
44 | ||
45 | static struct poptOption long_options[] = { | |
46 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
47 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
b09ee5ba | 48 | {"all", 'a', POPT_ARG_VAL, &opt_destroy_all, 1, 0, 0}, |
679b4943 | 49 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
e20ee7c2 | 50 | {"no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0}, |
f3ed775e DG |
51 | {0, 0, 0, 0, 0, 0, 0} |
52 | }; | |
53 | ||
54 | /* | |
55 | * usage | |
56 | */ | |
57 | static void usage(FILE *ofp) | |
58 | { | |
32a6298d | 59 | fprintf(ofp, "usage: lttng destroy [NAME] [OPTIONS]\n"); |
f3ed775e DG |
60 | fprintf(ofp, "\n"); |
61 | fprintf(ofp, "Where NAME is an optional session name. If not specified, lttng will\n"); | |
62 | fprintf(ofp, "get it from the configuration directory (.lttng).\n"); | |
63 | fprintf(ofp, "\n"); | |
32a6298d | 64 | fprintf(ofp, "Options:\n"); |
f3ed775e | 65 | fprintf(ofp, " -h, --help Show this help\n"); |
b09ee5ba | 66 | fprintf(ofp, " -a, --all Destroy all sessions\n"); |
27221701 | 67 | fprintf(ofp, " --list-options Simple listing of options\n"); |
e20ee7c2 | 68 | fprintf(ofp, " -n, --no-wait Don't wait for data availability\n"); |
f3ed775e DG |
69 | fprintf(ofp, "\n"); |
70 | } | |
71 | ||
72 | /* | |
b09ee5ba FG |
73 | * destroy_session |
74 | * | |
75 | * Unregister the provided session to the session daemon. On success, removes | |
76 | * the default configuration. | |
f3ed775e | 77 | */ |
65f25c66 | 78 | static int destroy_session(struct lttng_session *session) |
f3ed775e DG |
79 | { |
80 | int ret; | |
1dac0189 | 81 | char *session_name = NULL; |
f3ed775e | 82 | |
e20ee7c2 JD |
83 | ret = lttng_stop_tracing_no_wait(session->name); |
84 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
85 | ERR("%s", lttng_strerror(ret)); | |
86 | } | |
87 | if (!opt_no_wait) { | |
88 | _MSG("Waiting for data availability"); | |
89 | fflush(stdout); | |
90 | do { | |
91 | ret = lttng_data_pending(session->name); | |
92 | if (ret < 0) { | |
93 | /* Return the data available call error. */ | |
94 | goto error; | |
95 | } | |
96 | ||
97 | /* | |
98 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
99 | * returned value indicates availability. | |
100 | */ | |
101 | if (ret) { | |
102 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); | |
103 | _MSG("."); | |
104 | fflush(stdout); | |
105 | } | |
106 | } while (ret != 0); | |
107 | MSG(""); | |
108 | } | |
109 | ||
110 | ret = lttng_destroy_session_no_wait(session->name); | |
f3ed775e | 111 | if (ret < 0) { |
b09ee5ba | 112 | goto error; |
f3ed775e DG |
113 | } |
114 | ||
65f25c66 | 115 | MSG("Session %s destroyed", session->name); |
1dac0189 PPM |
116 | |
117 | session_name = get_session_name_quiet(); | |
118 | if (session_name && !strncmp(session->name, session_name, NAME_MAX)) { | |
119 | config_destroy_default(); | |
120 | } | |
65f25c66 JRJ |
121 | |
122 | if (lttng_opt_mi) { | |
123 | ret = mi_lttng_session(writer, session, 0); | |
124 | if (ret) { | |
125 | ret = CMD_ERROR; | |
126 | goto error; | |
127 | } | |
128 | } | |
129 | ||
f3ed775e | 130 | ret = CMD_SUCCESS; |
b09ee5ba | 131 | error: |
1dac0189 | 132 | free(session_name); |
b09ee5ba FG |
133 | return ret; |
134 | } | |
f3ed775e | 135 | |
b09ee5ba FG |
136 | /* |
137 | * destroy_all_sessions | |
138 | * | |
139 | * Call destroy_sessions for each registered sessions | |
140 | */ | |
65f25c66 | 141 | static int destroy_all_sessions(struct lttng_session *sessions, int count) |
b09ee5ba | 142 | { |
65f25c66 | 143 | int i, ret = CMD_SUCCESS; |
b09ee5ba | 144 | |
b09ee5ba FG |
145 | if (count == 0) { |
146 | MSG("No session found, nothing to do."); | |
60e835ca DG |
147 | } else if (count < 0) { |
148 | ERR("%s", lttng_strerror(ret)); | |
149 | goto error; | |
b09ee5ba | 150 | } |
60e835ca | 151 | |
b09ee5ba | 152 | for (i = 0; i < count; i++) { |
65f25c66 | 153 | ret = destroy_session(&sessions[i]); |
b09ee5ba FG |
154 | if (ret < 0) { |
155 | goto error; | |
156 | } | |
b73d0b29 | 157 | } |
f3ed775e DG |
158 | error: |
159 | return ret; | |
160 | } | |
161 | ||
162 | /* | |
843f5df9 | 163 | * The 'destroy <options>' first level command |
f3ed775e DG |
164 | */ |
165 | int cmd_destroy(int argc, const char **argv) | |
166 | { | |
b09ee5ba | 167 | int opt; |
65f25c66 | 168 | int ret = CMD_SUCCESS , i, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 169 | static poptContext pc; |
b09ee5ba | 170 | char *session_name = NULL; |
f3ed775e | 171 | |
65f25c66 JRJ |
172 | struct lttng_session *sessions; |
173 | int count; | |
174 | int found; | |
175 | ||
f3ed775e DG |
176 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
177 | poptReadDefaultConfig(pc, 0); | |
178 | ||
179 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
180 | switch (opt) { | |
181 | case OPT_HELP: | |
ca1c3607 | 182 | usage(stdout); |
b09ee5ba | 183 | break; |
679b4943 SM |
184 | case OPT_LIST_OPTIONS: |
185 | list_cmd_options(stdout, long_options); | |
b09ee5ba | 186 | break; |
f3ed775e DG |
187 | default: |
188 | usage(stderr); | |
189 | ret = CMD_UNDEFINED; | |
b09ee5ba | 190 | break; |
f3ed775e | 191 | } |
b09ee5ba | 192 | goto end; |
f3ed775e DG |
193 | } |
194 | ||
65f25c66 | 195 | /* Mi preparation */ |
c7e35b03 | 196 | if (lttng_opt_mi) { |
65f25c66 JRJ |
197 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
198 | if (!writer) { | |
199 | ret = -LTTNG_ERR_NOMEM; | |
200 | goto end; | |
201 | } | |
202 | ||
203 | /* Open command element */ | |
204 | ret = mi_lttng_writer_command_open(writer, | |
205 | mi_lttng_element_command_destroy); | |
206 | if (ret) { | |
207 | ret = CMD_ERROR; | |
208 | goto end; | |
209 | } | |
210 | ||
211 | /* Open output element */ | |
212 | ret = mi_lttng_writer_open_element(writer, | |
213 | mi_lttng_element_command_output); | |
214 | if (ret) { | |
215 | ret = CMD_ERROR; | |
216 | goto end; | |
217 | } | |
218 | ||
219 | /* For validation and semantic purpose we open a sessions element */ | |
220 | ret = mi_lttng_sessions_open(writer); | |
221 | if (ret) { | |
222 | ret = CMD_ERROR; | |
223 | goto end; | |
224 | } | |
225 | } | |
226 | ||
227 | /* Recuperate all sessions for further operation */ | |
228 | count = lttng_list_sessions(&sessions); | |
229 | if (count < 0) { | |
230 | command_ret = count; | |
231 | success = 0; | |
232 | goto mi_closing; | |
c7e35b03 JR |
233 | } |
234 | ||
fd076c09 | 235 | /* Ignore session name in case all sessions are to be destroyed */ |
b09ee5ba | 236 | if (opt_destroy_all) { |
65f25c66 JRJ |
237 | command_ret = destroy_all_sessions(sessions, count); |
238 | if (command_ret) { | |
239 | success = 0; | |
240 | } | |
241 | } else { | |
242 | opt_session_name = (char *) poptGetArg(pc); | |
243 | ||
1dac0189 | 244 | if (!opt_session_name) { |
65f25c66 JRJ |
245 | /* No session name specified, lookup default */ |
246 | session_name = get_session_name(); | |
247 | if (session_name == NULL) { | |
248 | command_ret = CMD_ERROR; | |
249 | success = 0; | |
250 | goto mi_closing; | |
251 | } | |
252 | } else { | |
253 | session_name = opt_session_name; | |
254 | } | |
fd076c09 | 255 | |
65f25c66 JRJ |
256 | /* Find the corresponding lttng_session struct */ |
257 | found = 0; | |
258 | for (i = 0; i < count; i++) { | |
259 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { | |
260 | found = 1; | |
261 | command_ret = destroy_session(&sessions[i]); | |
262 | if (command_ret) { | |
263 | success = 0; | |
264 | } | |
fd076c09 | 265 | |
65f25c66 JRJ |
266 | } |
267 | } | |
268 | ||
269 | if (!found) { | |
270 | ERR("Session name %s not found", session_name); | |
271 | command_ret = LTTNG_ERR_SESS_NOT_FOUND; | |
272 | success = 0; | |
273 | goto mi_closing; | |
274 | } | |
275 | } | |
276 | ||
277 | mi_closing: | |
278 | /* Mi closing */ | |
279 | if (lttng_opt_mi) { | |
280 | /* Close sessions and output element element */ | |
281 | ret = mi_lttng_close_multi_element(writer, 2); | |
282 | if (ret) { | |
fd076c09 | 283 | ret = CMD_ERROR; |
b09ee5ba FG |
284 | goto end; |
285 | } | |
fd076c09 | 286 | |
65f25c66 JRJ |
287 | /* Success ? */ |
288 | ret = mi_lttng_writer_write_element_bool(writer, | |
289 | mi_lttng_element_command_success, success); | |
290 | if (ret) { | |
291 | ret = CMD_ERROR; | |
292 | goto end; | |
293 | } | |
f3ed775e | 294 | |
65f25c66 JRJ |
295 | /* Command element close */ |
296 | ret = mi_lttng_writer_command_close(writer); | |
297 | if (ret) { | |
298 | ret = CMD_ERROR; | |
299 | goto end; | |
300 | } | |
301 | } | |
f3ed775e | 302 | end: |
65f25c66 JRJ |
303 | /* Mi clean-up */ |
304 | if (writer && mi_lttng_writer_destroy(writer)) { | |
305 | /* Preserve original error code */ | |
306 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
307 | } | |
308 | ||
fd076c09 | 309 | if (opt_session_name == NULL) { |
b09ee5ba FG |
310 | free(session_name); |
311 | } | |
fd076c09 | 312 | |
65f25c66 JRJ |
313 | /* Overwrite ret if an error occurred during destroy_session/all */ |
314 | ret = command_ret ? command_ret : ret; | |
315 | ||
fd076c09 | 316 | poptFreeContext(pc); |
f3ed775e DG |
317 | return ret; |
318 | } |