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> | |
20fb9e02 | 26 | #include <stdbool.h> |
f3ed775e | 27 | |
c399183f | 28 | #include "../command.h" |
f3ed775e | 29 | |
65f25c66 | 30 | #include <common/mi-lttng.h> |
42224349 | 31 | #include <common/sessiond-comm/sessiond-comm.h> |
1dac0189 | 32 | #include <common/utils.h> |
42224349 | 33 | |
fd076c09 | 34 | static char *opt_session_name; |
b09ee5ba | 35 | static int opt_destroy_all; |
e20ee7c2 | 36 | static int opt_no_wait; |
f3ed775e | 37 | |
4fc83d94 PP |
38 | #ifdef LTTNG_EMBED_HELP |
39 | static const char help_msg[] = | |
40 | #include <lttng-destroy.1.h> | |
41 | ; | |
42 | #endif | |
43 | ||
65f25c66 JRJ |
44 | /* Mi writer */ |
45 | static struct mi_writer *writer; | |
46 | ||
f3ed775e DG |
47 | enum { |
48 | OPT_HELP = 1, | |
679b4943 | 49 | OPT_LIST_OPTIONS, |
f3ed775e DG |
50 | }; |
51 | ||
52 | static struct poptOption long_options[] = { | |
53 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
54 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
b09ee5ba | 55 | {"all", 'a', POPT_ARG_VAL, &opt_destroy_all, 1, 0, 0}, |
679b4943 | 56 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
e20ee7c2 | 57 | {"no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0}, |
f3ed775e DG |
58 | {0, 0, 0, 0, 0, 0, 0} |
59 | }; | |
60 | ||
f3ed775e | 61 | /* |
b09ee5ba FG |
62 | * destroy_session |
63 | * | |
64 | * Unregister the provided session to the session daemon. On success, removes | |
65 | * the default configuration. | |
f3ed775e | 66 | */ |
65f25c66 | 67 | static int destroy_session(struct lttng_session *session) |
f3ed775e DG |
68 | { |
69 | int ret; | |
1dac0189 | 70 | char *session_name = NULL; |
20fb9e02 | 71 | bool session_was_stopped; |
f3ed775e | 72 | |
e20ee7c2 JD |
73 | ret = lttng_stop_tracing_no_wait(session->name); |
74 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
75 | ERR("%s", lttng_strerror(ret)); | |
76 | } | |
20fb9e02 | 77 | session_was_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED; |
e20ee7c2 | 78 | if (!opt_no_wait) { |
01f55be4 JG |
79 | bool printed_wait_msg = false; |
80 | ||
e20ee7c2 JD |
81 | do { |
82 | ret = lttng_data_pending(session->name); | |
83 | if (ret < 0) { | |
84 | /* Return the data available call error. */ | |
85 | goto error; | |
86 | } | |
87 | ||
88 | /* | |
89 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
90 | * returned value indicates availability. | |
91 | */ | |
92 | if (ret) { | |
01f55be4 JG |
93 | if (!printed_wait_msg) { |
94 | _MSG("Waiting for data availability"); | |
95 | fflush(stdout); | |
96 | } | |
97 | ||
98 | printed_wait_msg = true; | |
e20ee7c2 JD |
99 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
100 | _MSG("."); | |
101 | fflush(stdout); | |
102 | } | |
103 | } while (ret != 0); | |
01f55be4 JG |
104 | if (printed_wait_msg) { |
105 | MSG(""); | |
106 | } | |
e20ee7c2 | 107 | } |
20fb9e02 JD |
108 | if (!session_was_stopped) { |
109 | /* | |
110 | * Don't print the event and packet loss warnings since the user | |
111 | * already saw them when stopping the trace. | |
112 | */ | |
113 | print_session_stats(session->name); | |
114 | } | |
e20ee7c2 JD |
115 | |
116 | ret = lttng_destroy_session_no_wait(session->name); | |
f3ed775e | 117 | if (ret < 0) { |
b09ee5ba | 118 | goto error; |
f3ed775e DG |
119 | } |
120 | ||
65f25c66 | 121 | MSG("Session %s destroyed", session->name); |
1dac0189 PPM |
122 | |
123 | session_name = get_session_name_quiet(); | |
124 | if (session_name && !strncmp(session->name, session_name, NAME_MAX)) { | |
125 | config_destroy_default(); | |
126 | } | |
65f25c66 JRJ |
127 | |
128 | if (lttng_opt_mi) { | |
129 | ret = mi_lttng_session(writer, session, 0); | |
130 | if (ret) { | |
131 | ret = CMD_ERROR; | |
132 | goto error; | |
133 | } | |
134 | } | |
135 | ||
f3ed775e | 136 | ret = CMD_SUCCESS; |
b09ee5ba | 137 | error: |
1dac0189 | 138 | free(session_name); |
b09ee5ba FG |
139 | return ret; |
140 | } | |
f3ed775e | 141 | |
b09ee5ba FG |
142 | /* |
143 | * destroy_all_sessions | |
144 | * | |
145 | * Call destroy_sessions for each registered sessions | |
146 | */ | |
65f25c66 | 147 | static int destroy_all_sessions(struct lttng_session *sessions, int count) |
b09ee5ba | 148 | { |
65f25c66 | 149 | int i, ret = CMD_SUCCESS; |
b09ee5ba | 150 | |
b09ee5ba FG |
151 | if (count == 0) { |
152 | MSG("No session found, nothing to do."); | |
60e835ca DG |
153 | } else if (count < 0) { |
154 | ERR("%s", lttng_strerror(ret)); | |
155 | goto error; | |
b09ee5ba | 156 | } |
60e835ca | 157 | |
b09ee5ba | 158 | for (i = 0; i < count; i++) { |
65f25c66 | 159 | ret = destroy_session(&sessions[i]); |
b09ee5ba FG |
160 | if (ret < 0) { |
161 | goto error; | |
162 | } | |
b73d0b29 | 163 | } |
f3ed775e DG |
164 | error: |
165 | return ret; | |
166 | } | |
167 | ||
168 | /* | |
843f5df9 | 169 | * The 'destroy <options>' first level command |
f3ed775e DG |
170 | */ |
171 | int cmd_destroy(int argc, const char **argv) | |
172 | { | |
b09ee5ba | 173 | int opt; |
65f25c66 | 174 | int ret = CMD_SUCCESS , i, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 175 | static poptContext pc; |
b09ee5ba | 176 | char *session_name = NULL; |
f3ed775e | 177 | |
65f25c66 JRJ |
178 | struct lttng_session *sessions; |
179 | int count; | |
180 | int found; | |
181 | ||
f3ed775e DG |
182 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
183 | poptReadDefaultConfig(pc, 0); | |
184 | ||
185 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
186 | switch (opt) { | |
187 | case OPT_HELP: | |
4ba92f18 | 188 | SHOW_HELP(); |
b09ee5ba | 189 | break; |
679b4943 SM |
190 | case OPT_LIST_OPTIONS: |
191 | list_cmd_options(stdout, long_options); | |
b09ee5ba | 192 | break; |
f3ed775e | 193 | default: |
f3ed775e | 194 | ret = CMD_UNDEFINED; |
b09ee5ba | 195 | break; |
f3ed775e | 196 | } |
b09ee5ba | 197 | goto end; |
f3ed775e DG |
198 | } |
199 | ||
65f25c66 | 200 | /* Mi preparation */ |
c7e35b03 | 201 | if (lttng_opt_mi) { |
65f25c66 JRJ |
202 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
203 | if (!writer) { | |
204 | ret = -LTTNG_ERR_NOMEM; | |
205 | goto end; | |
206 | } | |
207 | ||
208 | /* Open command element */ | |
209 | ret = mi_lttng_writer_command_open(writer, | |
210 | mi_lttng_element_command_destroy); | |
211 | if (ret) { | |
212 | ret = CMD_ERROR; | |
213 | goto end; | |
214 | } | |
215 | ||
216 | /* Open output element */ | |
217 | ret = mi_lttng_writer_open_element(writer, | |
218 | mi_lttng_element_command_output); | |
219 | if (ret) { | |
220 | ret = CMD_ERROR; | |
221 | goto end; | |
222 | } | |
223 | ||
224 | /* For validation and semantic purpose we open a sessions element */ | |
225 | ret = mi_lttng_sessions_open(writer); | |
226 | if (ret) { | |
227 | ret = CMD_ERROR; | |
228 | goto end; | |
229 | } | |
230 | } | |
231 | ||
232 | /* Recuperate all sessions for further operation */ | |
233 | count = lttng_list_sessions(&sessions); | |
234 | if (count < 0) { | |
235 | command_ret = count; | |
236 | success = 0; | |
237 | goto mi_closing; | |
c7e35b03 JR |
238 | } |
239 | ||
fd076c09 | 240 | /* Ignore session name in case all sessions are to be destroyed */ |
b09ee5ba | 241 | if (opt_destroy_all) { |
65f25c66 JRJ |
242 | command_ret = destroy_all_sessions(sessions, count); |
243 | if (command_ret) { | |
244 | success = 0; | |
245 | } | |
246 | } else { | |
247 | opt_session_name = (char *) poptGetArg(pc); | |
248 | ||
1dac0189 | 249 | if (!opt_session_name) { |
65f25c66 JRJ |
250 | /* No session name specified, lookup default */ |
251 | session_name = get_session_name(); | |
252 | if (session_name == NULL) { | |
253 | command_ret = CMD_ERROR; | |
254 | success = 0; | |
255 | goto mi_closing; | |
256 | } | |
257 | } else { | |
258 | session_name = opt_session_name; | |
259 | } | |
fd076c09 | 260 | |
65f25c66 JRJ |
261 | /* Find the corresponding lttng_session struct */ |
262 | found = 0; | |
263 | for (i = 0; i < count; i++) { | |
264 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { | |
265 | found = 1; | |
266 | command_ret = destroy_session(&sessions[i]); | |
267 | if (command_ret) { | |
268 | success = 0; | |
269 | } | |
fd076c09 | 270 | |
65f25c66 JRJ |
271 | } |
272 | } | |
273 | ||
274 | if (!found) { | |
275 | ERR("Session name %s not found", session_name); | |
276 | command_ret = LTTNG_ERR_SESS_NOT_FOUND; | |
277 | success = 0; | |
278 | goto mi_closing; | |
279 | } | |
280 | } | |
281 | ||
282 | mi_closing: | |
283 | /* Mi closing */ | |
284 | if (lttng_opt_mi) { | |
285 | /* Close sessions and output element element */ | |
286 | ret = mi_lttng_close_multi_element(writer, 2); | |
287 | if (ret) { | |
fd076c09 | 288 | ret = CMD_ERROR; |
b09ee5ba FG |
289 | goto end; |
290 | } | |
fd076c09 | 291 | |
65f25c66 JRJ |
292 | /* Success ? */ |
293 | ret = mi_lttng_writer_write_element_bool(writer, | |
294 | mi_lttng_element_command_success, success); | |
295 | if (ret) { | |
296 | ret = CMD_ERROR; | |
297 | goto end; | |
298 | } | |
f3ed775e | 299 | |
65f25c66 JRJ |
300 | /* Command element close */ |
301 | ret = mi_lttng_writer_command_close(writer); | |
302 | if (ret) { | |
303 | ret = CMD_ERROR; | |
304 | goto end; | |
305 | } | |
306 | } | |
f3ed775e | 307 | end: |
65f25c66 JRJ |
308 | /* Mi clean-up */ |
309 | if (writer && mi_lttng_writer_destroy(writer)) { | |
310 | /* Preserve original error code */ | |
311 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
312 | } | |
313 | ||
fd076c09 | 314 | if (opt_session_name == NULL) { |
b09ee5ba FG |
315 | free(session_name); |
316 | } | |
fd076c09 | 317 | |
65f25c66 JRJ |
318 | /* Overwrite ret if an error occurred during destroy_session/all */ |
319 | ret = command_ret ? command_ret : ret; | |
320 | ||
fd076c09 | 321 | poptFreeContext(pc); |
f3ed775e DG |
322 | return ret; |
323 | } |