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> | |
e5b83100 | 26 | #include <assert.h> |
f3ed775e | 27 | |
42224349 | 28 | #include <common/sessiond-comm/sessiond-comm.h> |
e5b83100 JRJ |
29 | #include <common/mi-lttng.h> |
30 | ||
31 | #include "../command.h" | |
42224349 | 32 | |
f3ed775e | 33 | static char *opt_session_name; |
38ee087f | 34 | static int opt_no_wait; |
e5b83100 | 35 | static struct mi_writer *writer; |
f3ed775e | 36 | |
4fc83d94 PP |
37 | #ifdef LTTNG_EMBED_HELP |
38 | static const char help_msg[] = | |
39 | #include <lttng-stop.1.h> | |
40 | ; | |
41 | #endif | |
42 | ||
f3ed775e DG |
43 | enum { |
44 | OPT_HELP = 1, | |
679b4943 | 45 | OPT_LIST_OPTIONS, |
f3ed775e DG |
46 | }; |
47 | ||
48 | static struct poptOption long_options[] = { | |
49 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
50 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
679b4943 | 51 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
38ee087f | 52 | {"no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0}, |
f3ed775e DG |
53 | {0, 0, 0, 0, 0, 0, 0} |
54 | }; | |
55 | ||
e5b83100 JRJ |
56 | /* |
57 | * Mi print of partial session | |
58 | */ | |
59 | static int mi_print_session(char *session_name, int enabled) | |
60 | { | |
61 | int ret; | |
62 | assert(writer); | |
63 | assert(session_name); | |
64 | ||
65 | /* Open session element */ | |
66 | ret = mi_lttng_writer_open_element(writer, config_element_session); | |
67 | if (ret) { | |
68 | goto end; | |
69 | } | |
70 | ||
71 | /* Print session name element */ | |
72 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, | |
73 | session_name); | |
74 | if (ret) { | |
75 | goto end; | |
76 | } | |
77 | ||
78 | /* Is enabled ? */ | |
79 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, | |
80 | enabled); | |
81 | if (ret) { | |
82 | goto end; | |
83 | } | |
84 | ||
85 | /* Close session element */ | |
86 | ret = mi_lttng_writer_close_element(writer); | |
87 | ||
88 | end: | |
89 | return ret; | |
90 | } | |
f3ed775e DG |
91 | |
92 | /* | |
cd80958d | 93 | * Start tracing for all trace of the session. |
f3ed775e DG |
94 | */ |
95 | static int stop_tracing(void) | |
96 | { | |
ae856491 | 97 | int ret; |
f3ed775e DG |
98 | char *session_name; |
99 | ||
100 | if (opt_session_name == NULL) { | |
101 | session_name = get_session_name(); | |
102 | if (session_name == NULL) { | |
103 | ret = CMD_ERROR; | |
104 | goto error; | |
105 | } | |
106 | } else { | |
107 | session_name = opt_session_name; | |
108 | } | |
109 | ||
8eb7a5e2 | 110 | ret = lttng_stop_tracing_no_wait(session_name); |
f3ed775e | 111 | if (ret < 0) { |
42224349 | 112 | switch (-ret) { |
f73fabfd | 113 | case LTTNG_ERR_TRACE_ALREADY_STOPPED: |
42224349 DG |
114 | WARN("Tracing already stopped for session %s", session_name); |
115 | break; | |
116 | default: | |
117 | ERR("%s", lttng_strerror(ret)); | |
118 | break; | |
119 | } | |
f3ed775e DG |
120 | goto free_name; |
121 | } | |
122 | ||
8eb7a5e2 JG |
123 | if (!opt_no_wait) { |
124 | _MSG("Waiting for data availability"); | |
125 | fflush(stdout); | |
126 | do { | |
127 | ret = lttng_data_pending(session_name); | |
128 | if (ret < 0) { | |
129 | /* Return the data available call error. */ | |
e5b83100 | 130 | goto free_name; |
8eb7a5e2 JG |
131 | } |
132 | ||
133 | /* | |
134 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
135 | * returned value indicates availability. | |
136 | */ | |
137 | if (ret) { | |
138 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); | |
139 | _MSG("."); | |
140 | fflush(stdout); | |
141 | } | |
142 | } while (ret != 0); | |
143 | MSG(""); | |
144 | } | |
145 | ||
ae856491 DG |
146 | ret = CMD_SUCCESS; |
147 | ||
20fb9e02 | 148 | print_session_stats(session_name); |
f3ed775e | 149 | MSG("Tracing stopped for session %s", session_name); |
e5b83100 JRJ |
150 | if (lttng_opt_mi) { |
151 | ret = mi_print_session(session_name, 0); | |
152 | if (ret) { | |
153 | goto free_name; | |
154 | } | |
155 | } | |
f3ed775e DG |
156 | |
157 | free_name: | |
b73d0b29 MD |
158 | if (opt_session_name == NULL) { |
159 | free(session_name); | |
160 | } | |
cd80958d | 161 | |
f3ed775e DG |
162 | error: |
163 | return ret; | |
164 | } | |
165 | ||
166 | /* | |
167 | * cmd_stop | |
168 | * | |
169 | * The 'stop <options>' first level command | |
170 | */ | |
171 | int cmd_stop(int argc, const char **argv) | |
172 | { | |
e5b83100 | 173 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e DG |
174 | static poptContext pc; |
175 | ||
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: | |
4ba92f18 | 182 | SHOW_HELP(); |
f3ed775e | 183 | goto end; |
679b4943 SM |
184 | case OPT_LIST_OPTIONS: |
185 | list_cmd_options(stdout, long_options); | |
679b4943 | 186 | goto end; |
f3ed775e | 187 | default: |
f3ed775e DG |
188 | ret = CMD_UNDEFINED; |
189 | goto end; | |
190 | } | |
191 | } | |
192 | ||
e5b83100 JRJ |
193 | /* Mi check */ |
194 | if (lttng_opt_mi) { | |
195 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
196 | if (!writer) { | |
197 | ret = -LTTNG_ERR_NOMEM; | |
198 | goto end; | |
199 | } | |
200 | ||
201 | /* Open command element */ | |
202 | ret = mi_lttng_writer_command_open(writer, | |
203 | mi_lttng_element_command_stop); | |
204 | if (ret) { | |
205 | ret = CMD_ERROR; | |
206 | goto end; | |
207 | } | |
208 | ||
209 | /* Open output element */ | |
210 | ret = mi_lttng_writer_open_element(writer, | |
211 | mi_lttng_element_command_output); | |
212 | if (ret) { | |
213 | ret = CMD_ERROR; | |
214 | goto end; | |
215 | } | |
216 | ||
217 | /* | |
218 | * Open sessions element | |
219 | * For validation | |
220 | */ | |
221 | ret = mi_lttng_writer_open_element(writer, | |
222 | config_element_sessions); | |
223 | if (ret) { | |
224 | ret = CMD_ERROR; | |
225 | goto end; | |
226 | } | |
227 | } | |
228 | ||
f3ed775e DG |
229 | opt_session_name = (char*) poptGetArg(pc); |
230 | ||
e5b83100 JRJ |
231 | command_ret = stop_tracing(); |
232 | if (command_ret) { | |
233 | success = 0; | |
234 | } | |
235 | ||
236 | /* Mi closing */ | |
237 | if (lttng_opt_mi) { | |
238 | /* Close sessions and output element */ | |
239 | ret = mi_lttng_close_multi_element(writer, 2); | |
240 | if (ret) { | |
241 | ret = CMD_ERROR; | |
242 | goto end; | |
243 | } | |
244 | ||
245 | /* Success ? */ | |
246 | ret = mi_lttng_writer_write_element_bool(writer, | |
247 | mi_lttng_element_command_success, success); | |
248 | if (ret) { | |
249 | ret = CMD_ERROR; | |
250 | goto end; | |
251 | } | |
252 | ||
253 | /* Command element close */ | |
254 | ret = mi_lttng_writer_command_close(writer); | |
255 | if (ret) { | |
256 | ret = CMD_ERROR; | |
257 | goto end; | |
258 | } | |
259 | } | |
f3ed775e DG |
260 | |
261 | end: | |
e5b83100 JRJ |
262 | /* Mi clean-up */ |
263 | if (writer && mi_lttng_writer_destroy(writer)) { | |
264 | /* Preserve original error code */ | |
265 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
266 | } | |
267 | ||
268 | /* Overwrite ret if an error occurred in stop_tracing() */ | |
269 | ret = command_ret ? command_ret : ret; | |
270 | ||
ca1c3607 | 271 | poptFreeContext(pc); |
f3ed775e DG |
272 | return ret; |
273 | } |