Commit | Line | Data |
---|---|---|
f3ed775e | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
f3ed775e | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
f3ed775e | 5 | * |
f3ed775e DG |
6 | */ |
7 | ||
6c1c0768 | 8 | #define _LGPL_SOURCE |
28ab034a | 9 | #include "../command.hpp" |
2a8d72ed | 10 | #include "../utils.hpp" |
28ab034a | 11 | |
2a8d72ed | 12 | #include <common/exception.hpp> |
28ab034a JG |
13 | #include <common/mi-lttng.hpp> |
14 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
15 | ||
f3ed775e DG |
16 | #include <popt.h> |
17 | #include <stdio.h> | |
18 | #include <stdlib.h> | |
19 | #include <string.h> | |
20 | #include <sys/stat.h> | |
21 | #include <sys/types.h> | |
22 | #include <unistd.h> | |
f3ed775e | 23 | |
38ee087f | 24 | static int opt_no_wait; |
e5b83100 | 25 | static struct mi_writer *writer; |
f3ed775e | 26 | |
4fc83d94 PP |
27 | #ifdef LTTNG_EMBED_HELP |
28 | static const char help_msg[] = | |
29 | #include <lttng-stop.1.h> | |
28ab034a | 30 | ; |
4fc83d94 PP |
31 | #endif |
32 | ||
f3ed775e DG |
33 | enum { |
34 | OPT_HELP = 1, | |
679b4943 | 35 | OPT_LIST_OPTIONS, |
2a8d72ed OD |
36 | OPT_ENABLE_GLOB, |
37 | OPT_ALL, | |
f3ed775e DG |
38 | }; |
39 | ||
40 | static struct poptOption long_options[] = { | |
41 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
cd9adb8b JG |
42 | { "help", 'h', POPT_ARG_NONE, nullptr, OPT_HELP, nullptr, nullptr }, |
43 | { "list-options", 0, POPT_ARG_NONE, nullptr, OPT_LIST_OPTIONS, nullptr, nullptr }, | |
44 | { "no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, nullptr, nullptr }, | |
2a8d72ed OD |
45 | { "glob", 'g', POPT_ARG_NONE, nullptr, OPT_ENABLE_GLOB, nullptr, nullptr }, |
46 | { "all", 'a', POPT_ARG_NONE, nullptr, OPT_ALL, nullptr, nullptr }, | |
cd9adb8b | 47 | { nullptr, 0, 0, nullptr, 0, nullptr, nullptr } |
f3ed775e DG |
48 | }; |
49 | ||
e5b83100 JRJ |
50 | /* |
51 | * Mi print of partial session | |
52 | */ | |
2a8d72ed | 53 | static int mi_print_session(const char *session_name, int enabled) |
e5b83100 JRJ |
54 | { |
55 | int ret; | |
a0377dfe FD |
56 | LTTNG_ASSERT(writer); |
57 | LTTNG_ASSERT(session_name); | |
e5b83100 JRJ |
58 | |
59 | /* Open session element */ | |
60 | ret = mi_lttng_writer_open_element(writer, config_element_session); | |
61 | if (ret) { | |
62 | goto end; | |
63 | } | |
64 | ||
65 | /* Print session name element */ | |
28ab034a | 66 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, session_name); |
e5b83100 JRJ |
67 | if (ret) { |
68 | goto end; | |
69 | } | |
70 | ||
71 | /* Is enabled ? */ | |
28ab034a | 72 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, enabled); |
e5b83100 JRJ |
73 | if (ret) { |
74 | goto end; | |
75 | } | |
76 | ||
77 | /* Close session element */ | |
78 | ret = mi_lttng_writer_close_element(writer); | |
79 | ||
80 | end: | |
81 | return ret; | |
82 | } | |
f3ed775e DG |
83 | |
84 | /* | |
cd80958d | 85 | * Start tracing for all trace of the session. |
f3ed775e | 86 | */ |
2a8d72ed | 87 | static int stop_tracing(const char *session_name) |
f3ed775e | 88 | { |
ae856491 | 89 | int ret; |
f3ed775e | 90 | |
8eb7a5e2 | 91 | ret = lttng_stop_tracing_no_wait(session_name); |
f3ed775e | 92 | if (ret < 0) { |
42224349 | 93 | switch (-ret) { |
f73fabfd | 94 | case LTTNG_ERR_TRACE_ALREADY_STOPPED: |
42224349 DG |
95 | WARN("Tracing already stopped for session %s", session_name); |
96 | break; | |
97 | default: | |
98 | ERR("%s", lttng_strerror(ret)); | |
99 | break; | |
100 | } | |
2a8d72ed | 101 | goto error; |
f3ed775e DG |
102 | } |
103 | ||
8eb7a5e2 JG |
104 | if (!opt_no_wait) { |
105 | _MSG("Waiting for data availability"); | |
106 | fflush(stdout); | |
107 | do { | |
108 | ret = lttng_data_pending(session_name); | |
109 | if (ret < 0) { | |
110 | /* Return the data available call error. */ | |
2a8d72ed | 111 | goto error; |
8eb7a5e2 JG |
112 | } |
113 | ||
114 | /* | |
115 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
116 | * returned value indicates availability. | |
117 | */ | |
118 | if (ret) { | |
c8f61fd4 | 119 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
8eb7a5e2 JG |
120 | _MSG("."); |
121 | fflush(stdout); | |
122 | } | |
123 | } while (ret != 0); | |
124 | MSG(""); | |
125 | } | |
126 | ||
ae856491 DG |
127 | ret = CMD_SUCCESS; |
128 | ||
20fb9e02 | 129 | print_session_stats(session_name); |
f3ed775e | 130 | MSG("Tracing stopped for session %s", session_name); |
e5b83100 JRJ |
131 | if (lttng_opt_mi) { |
132 | ret = mi_print_session(session_name, 0); | |
e5b83100 | 133 | } |
2a8d72ed OD |
134 | error: |
135 | return ret; | |
136 | } | |
f3ed775e | 137 | |
2a8d72ed OD |
138 | static int stop_tracing(const struct session_spec& spec) |
139 | { | |
140 | int ret = CMD_SUCCESS; | |
141 | ||
142 | try { | |
143 | for (const auto& session : list_sessions(spec)) { | |
144 | int const sub_ret = stop_tracing(session.name); | |
145 | ||
146 | if (sub_ret != CMD_SUCCESS) { | |
147 | ret = sub_ret; | |
148 | } | |
149 | } | |
150 | } catch (lttng::ctl::error& error) { | |
151 | ret = error.code(); | |
152 | } | |
cd80958d | 153 | |
f3ed775e DG |
154 | return ret; |
155 | } | |
156 | ||
157 | /* | |
158 | * cmd_stop | |
159 | * | |
160 | * The 'stop <options>' first level command | |
161 | */ | |
162 | int cmd_stop(int argc, const char **argv) | |
163 | { | |
e5b83100 | 164 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 165 | static poptContext pc; |
cd9adb8b | 166 | const char *leftover = nullptr; |
2a8d72ed OD |
167 | struct session_spec session_spec = { |
168 | .type = session_spec::NAME, | |
169 | .value = nullptr, | |
170 | }; | |
f3ed775e | 171 | |
cd9adb8b | 172 | pc = poptGetContext(nullptr, argc, argv, long_options, 0); |
f3ed775e DG |
173 | poptReadDefaultConfig(pc, 0); |
174 | ||
175 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
176 | switch (opt) { | |
177 | case OPT_HELP: | |
4ba92f18 | 178 | SHOW_HELP(); |
f3ed775e | 179 | goto end; |
679b4943 SM |
180 | case OPT_LIST_OPTIONS: |
181 | list_cmd_options(stdout, long_options); | |
679b4943 | 182 | goto end; |
2a8d72ed OD |
183 | case OPT_ENABLE_GLOB: |
184 | session_spec.type = session_spec::GLOB_PATTERN; | |
185 | break; | |
186 | case OPT_ALL: | |
187 | session_spec.type = session_spec::ALL; | |
188 | break; | |
f3ed775e | 189 | default: |
f3ed775e DG |
190 | ret = CMD_UNDEFINED; |
191 | goto end; | |
192 | } | |
193 | } | |
194 | ||
e5b83100 JRJ |
195 | /* Mi check */ |
196 | if (lttng_opt_mi) { | |
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 */ | |
28ab034a | 204 | ret = mi_lttng_writer_command_open(writer, mi_lttng_element_command_stop); |
e5b83100 JRJ |
205 | if (ret) { |
206 | ret = CMD_ERROR; | |
207 | goto end; | |
208 | } | |
209 | ||
210 | /* Open output element */ | |
28ab034a | 211 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command_output); |
e5b83100 JRJ |
212 | if (ret) { |
213 | ret = CMD_ERROR; | |
214 | goto end; | |
215 | } | |
216 | ||
217 | /* | |
218 | * Open sessions element | |
219 | * For validation | |
220 | */ | |
28ab034a | 221 | ret = mi_lttng_writer_open_element(writer, config_element_sessions); |
e5b83100 JRJ |
222 | if (ret) { |
223 | ret = CMD_ERROR; | |
224 | goto end; | |
225 | } | |
226 | } | |
227 | ||
2a8d72ed | 228 | session_spec.value = poptGetArg(pc); |
f3ed775e | 229 | |
68c7f6e5 JD |
230 | leftover = poptGetArg(pc); |
231 | if (leftover) { | |
232 | ERR("Unknown argument: %s", leftover); | |
233 | ret = CMD_ERROR; | |
234 | goto end; | |
235 | } | |
236 | ||
2a8d72ed | 237 | command_ret = stop_tracing(session_spec); |
e5b83100 JRJ |
238 | if (command_ret) { |
239 | success = 0; | |
240 | } | |
241 | ||
242 | /* Mi closing */ | |
243 | if (lttng_opt_mi) { | |
244 | /* Close sessions and output element */ | |
245 | ret = mi_lttng_close_multi_element(writer, 2); | |
246 | if (ret) { | |
247 | ret = CMD_ERROR; | |
248 | goto end; | |
249 | } | |
250 | ||
251 | /* Success ? */ | |
28ab034a JG |
252 | ret = mi_lttng_writer_write_element_bool( |
253 | writer, mi_lttng_element_command_success, success); | |
e5b83100 JRJ |
254 | if (ret) { |
255 | ret = CMD_ERROR; | |
256 | goto end; | |
257 | } | |
258 | ||
259 | /* Command element close */ | |
260 | ret = mi_lttng_writer_command_close(writer); | |
261 | if (ret) { | |
262 | ret = CMD_ERROR; | |
263 | goto end; | |
264 | } | |
265 | } | |
f3ed775e DG |
266 | |
267 | end: | |
e5b83100 JRJ |
268 | /* Mi clean-up */ |
269 | if (writer && mi_lttng_writer_destroy(writer)) { | |
270 | /* Preserve original error code */ | |
271 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
272 | } | |
273 | ||
274 | /* Overwrite ret if an error occurred in stop_tracing() */ | |
275 | ret = command_ret ? command_ret : ret; | |
276 | ||
ca1c3607 | 277 | poptFreeContext(pc); |
f3ed775e DG |
278 | return ret; |
279 | } |