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 | |
5330763e JG |
24 | enum { |
25 | OPT_HELP = 1, | |
26 | OPT_LIST_OPTIONS, | |
27 | OPT_ENABLE_GLOB, | |
28 | OPT_ALL, | |
29 | }; | |
f3ed775e | 30 | |
5330763e | 31 | namespace { |
4fc83d94 PP |
32 | #ifdef LTTNG_EMBED_HELP |
33 | static const char help_msg[] = | |
34 | #include <lttng-stop.1.h> | |
28ab034a | 35 | ; |
4fc83d94 PP |
36 | #endif |
37 | ||
5330763e JG |
38 | int opt_no_wait; |
39 | struct mi_writer *writer; | |
f3ed775e | 40 | |
5330763e | 41 | struct poptOption long_options[] = { |
f3ed775e | 42 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ |
cd9adb8b JG |
43 | { "help", 'h', POPT_ARG_NONE, nullptr, OPT_HELP, nullptr, nullptr }, |
44 | { "list-options", 0, POPT_ARG_NONE, nullptr, OPT_LIST_OPTIONS, nullptr, nullptr }, | |
45 | { "no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, nullptr, nullptr }, | |
2a8d72ed OD |
46 | { "glob", 'g', POPT_ARG_NONE, nullptr, OPT_ENABLE_GLOB, nullptr, nullptr }, |
47 | { "all", 'a', POPT_ARG_NONE, nullptr, OPT_ALL, nullptr, nullptr }, | |
cd9adb8b | 48 | { nullptr, 0, 0, nullptr, 0, nullptr, nullptr } |
f3ed775e DG |
49 | }; |
50 | ||
e5b83100 JRJ |
51 | /* |
52 | * Mi print of partial session | |
53 | */ | |
5330763e | 54 | int mi_print_session(const char *session_name, int enabled) |
e5b83100 JRJ |
55 | { |
56 | int ret; | |
a0377dfe FD |
57 | LTTNG_ASSERT(writer); |
58 | LTTNG_ASSERT(session_name); | |
e5b83100 JRJ |
59 | |
60 | /* Open session element */ | |
61 | ret = mi_lttng_writer_open_element(writer, config_element_session); | |
62 | if (ret) { | |
63 | goto end; | |
64 | } | |
65 | ||
66 | /* Print session name element */ | |
28ab034a | 67 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, session_name); |
e5b83100 JRJ |
68 | if (ret) { |
69 | goto end; | |
70 | } | |
71 | ||
72 | /* Is enabled ? */ | |
28ab034a | 73 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, enabled); |
e5b83100 JRJ |
74 | if (ret) { |
75 | goto end; | |
76 | } | |
77 | ||
78 | /* Close session element */ | |
79 | ret = mi_lttng_writer_close_element(writer); | |
80 | ||
81 | end: | |
82 | return ret; | |
83 | } | |
f3ed775e DG |
84 | |
85 | /* | |
cd80958d | 86 | * Start tracing for all trace of the session. |
f3ed775e | 87 | */ |
5330763e | 88 | int stop_tracing(const char *session_name) |
f3ed775e | 89 | { |
ae856491 | 90 | int ret; |
f3ed775e | 91 | |
8eb7a5e2 | 92 | ret = lttng_stop_tracing_no_wait(session_name); |
f3ed775e | 93 | if (ret < 0) { |
42224349 | 94 | switch (-ret) { |
f73fabfd | 95 | case LTTNG_ERR_TRACE_ALREADY_STOPPED: |
42224349 DG |
96 | WARN("Tracing already stopped for session %s", session_name); |
97 | break; | |
98 | default: | |
99 | ERR("%s", lttng_strerror(ret)); | |
100 | break; | |
101 | } | |
2a8d72ed | 102 | goto error; |
f3ed775e DG |
103 | } |
104 | ||
8eb7a5e2 JG |
105 | if (!opt_no_wait) { |
106 | _MSG("Waiting for data availability"); | |
107 | fflush(stdout); | |
108 | do { | |
109 | ret = lttng_data_pending(session_name); | |
110 | if (ret < 0) { | |
111 | /* Return the data available call error. */ | |
2a8d72ed | 112 | goto error; |
8eb7a5e2 JG |
113 | } |
114 | ||
115 | /* | |
116 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
117 | * returned value indicates availability. | |
118 | */ | |
119 | if (ret) { | |
c8f61fd4 | 120 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
8eb7a5e2 JG |
121 | _MSG("."); |
122 | fflush(stdout); | |
123 | } | |
124 | } while (ret != 0); | |
125 | MSG(""); | |
126 | } | |
127 | ||
ae856491 DG |
128 | ret = CMD_SUCCESS; |
129 | ||
20fb9e02 | 130 | print_session_stats(session_name); |
f3ed775e | 131 | MSG("Tracing stopped for session %s", session_name); |
e5b83100 JRJ |
132 | if (lttng_opt_mi) { |
133 | ret = mi_print_session(session_name, 0); | |
e5b83100 | 134 | } |
2a8d72ed OD |
135 | error: |
136 | return ret; | |
137 | } | |
f3ed775e | 138 | |
5330763e | 139 | int stop_tracing(const struct session_spec& spec) |
2a8d72ed OD |
140 | { |
141 | int ret = CMD_SUCCESS; | |
142 | ||
143 | try { | |
144 | for (const auto& session : list_sessions(spec)) { | |
145 | int const sub_ret = stop_tracing(session.name); | |
146 | ||
147 | if (sub_ret != CMD_SUCCESS) { | |
148 | ret = sub_ret; | |
149 | } | |
150 | } | |
151 | } catch (lttng::ctl::error& error) { | |
152 | ret = error.code(); | |
153 | } | |
cd80958d | 154 | |
f3ed775e DG |
155 | return ret; |
156 | } | |
5330763e | 157 | } /* namespace */ |
f3ed775e DG |
158 | |
159 | /* | |
160 | * cmd_stop | |
161 | * | |
162 | * The 'stop <options>' first level command | |
163 | */ | |
164 | int cmd_stop(int argc, const char **argv) | |
165 | { | |
e5b83100 | 166 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 167 | static poptContext pc; |
cd9adb8b | 168 | const char *leftover = nullptr; |
2a8d72ed OD |
169 | struct session_spec session_spec = { |
170 | .type = session_spec::NAME, | |
171 | .value = nullptr, | |
172 | }; | |
f3ed775e | 173 | |
cd9adb8b | 174 | pc = poptGetContext(nullptr, argc, argv, long_options, 0); |
f3ed775e DG |
175 | poptReadDefaultConfig(pc, 0); |
176 | ||
177 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
178 | switch (opt) { | |
179 | case OPT_HELP: | |
4ba92f18 | 180 | SHOW_HELP(); |
f3ed775e | 181 | goto end; |
679b4943 SM |
182 | case OPT_LIST_OPTIONS: |
183 | list_cmd_options(stdout, long_options); | |
679b4943 | 184 | goto end; |
2a8d72ed OD |
185 | case OPT_ENABLE_GLOB: |
186 | session_spec.type = session_spec::GLOB_PATTERN; | |
187 | break; | |
188 | case OPT_ALL: | |
189 | session_spec.type = session_spec::ALL; | |
190 | break; | |
f3ed775e | 191 | default: |
f3ed775e DG |
192 | ret = CMD_UNDEFINED; |
193 | goto end; | |
194 | } | |
195 | } | |
196 | ||
e5b83100 JRJ |
197 | /* Mi check */ |
198 | if (lttng_opt_mi) { | |
199 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
200 | if (!writer) { | |
201 | ret = -LTTNG_ERR_NOMEM; | |
202 | goto end; | |
203 | } | |
204 | ||
205 | /* Open command element */ | |
28ab034a | 206 | ret = mi_lttng_writer_command_open(writer, mi_lttng_element_command_stop); |
e5b83100 JRJ |
207 | if (ret) { |
208 | ret = CMD_ERROR; | |
209 | goto end; | |
210 | } | |
211 | ||
212 | /* Open output element */ | |
28ab034a | 213 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command_output); |
e5b83100 JRJ |
214 | if (ret) { |
215 | ret = CMD_ERROR; | |
216 | goto end; | |
217 | } | |
218 | ||
219 | /* | |
220 | * Open sessions element | |
221 | * For validation | |
222 | */ | |
28ab034a | 223 | ret = mi_lttng_writer_open_element(writer, config_element_sessions); |
e5b83100 JRJ |
224 | if (ret) { |
225 | ret = CMD_ERROR; | |
226 | goto end; | |
227 | } | |
228 | } | |
229 | ||
2a8d72ed | 230 | session_spec.value = poptGetArg(pc); |
f3ed775e | 231 | |
68c7f6e5 JD |
232 | leftover = poptGetArg(pc); |
233 | if (leftover) { | |
234 | ERR("Unknown argument: %s", leftover); | |
235 | ret = CMD_ERROR; | |
236 | goto end; | |
237 | } | |
238 | ||
2a8d72ed | 239 | command_ret = stop_tracing(session_spec); |
e5b83100 JRJ |
240 | if (command_ret) { |
241 | success = 0; | |
242 | } | |
243 | ||
244 | /* Mi closing */ | |
245 | if (lttng_opt_mi) { | |
246 | /* Close sessions and output element */ | |
247 | ret = mi_lttng_close_multi_element(writer, 2); | |
248 | if (ret) { | |
249 | ret = CMD_ERROR; | |
250 | goto end; | |
251 | } | |
252 | ||
253 | /* Success ? */ | |
28ab034a JG |
254 | ret = mi_lttng_writer_write_element_bool( |
255 | writer, mi_lttng_element_command_success, success); | |
e5b83100 JRJ |
256 | if (ret) { |
257 | ret = CMD_ERROR; | |
258 | goto end; | |
259 | } | |
260 | ||
261 | /* Command element close */ | |
262 | ret = mi_lttng_writer_command_close(writer); | |
263 | if (ret) { | |
264 | ret = CMD_ERROR; | |
265 | goto end; | |
266 | } | |
267 | } | |
f3ed775e DG |
268 | |
269 | end: | |
e5b83100 JRJ |
270 | /* Mi clean-up */ |
271 | if (writer && mi_lttng_writer_destroy(writer)) { | |
272 | /* Preserve original error code */ | |
273 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
274 | } | |
275 | ||
276 | /* Overwrite ret if an error occurred in stop_tracing() */ | |
277 | ret = command_ret ? command_ret : ret; | |
278 | ||
ca1c3607 | 279 | poptFreeContext(pc); |
f3ed775e DG |
280 | return ret; |
281 | } |