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" |
e8c353ad | 10 | #include "../exception.hpp" |
eaa8ef76 | 11 | #include "../utils.hpp" |
28ab034a | 12 | |
eaa8ef76 | 13 | #include <common/exception.hpp> |
28ab034a JG |
14 | #include <common/mi-lttng.hpp> |
15 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
16 | ||
f3ed775e DG |
17 | #include <popt.h> |
18 | #include <stdio.h> | |
19 | #include <stdlib.h> | |
20 | #include <string.h> | |
21 | #include <sys/stat.h> | |
22 | #include <sys/types.h> | |
23 | #include <unistd.h> | |
24 | ||
f3ed775e DG |
25 | enum { |
26 | OPT_HELP = 1, | |
679b4943 | 27 | OPT_LIST_OPTIONS, |
eaa8ef76 OD |
28 | OPT_ENABLE_GLOB, |
29 | OPT_ALL, | |
f3ed775e DG |
30 | }; |
31 | ||
9183bb27 JG |
32 | namespace { |
33 | struct mi_writer *writer; | |
34 | ||
35 | #ifdef LTTNG_EMBED_HELP | |
36 | const char help_msg[] = | |
37 | #include <lttng-start.1.h> | |
38 | ; | |
39 | #endif | |
40 | ||
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 }, | |
eaa8ef76 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 | ||
9183bb27 | 50 | int mi_print_session(const char *session_name, int enabled) |
1cfc0bc8 JRJ |
51 | { |
52 | int ret; | |
53 | ||
54 | /* Open session element */ | |
55 | ret = mi_lttng_writer_open_element(writer, config_element_session); | |
56 | if (ret) { | |
57 | goto end; | |
58 | } | |
59 | ||
60 | /* Print session name element */ | |
28ab034a | 61 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, session_name); |
1cfc0bc8 JRJ |
62 | if (ret) { |
63 | goto end; | |
64 | } | |
65 | ||
28ab034a | 66 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, enabled); |
1cfc0bc8 JRJ |
67 | if (ret) { |
68 | goto end; | |
69 | } | |
70 | ||
71 | /* Close session element */ | |
72 | ret = mi_lttng_writer_close_element(writer); | |
73 | ||
74 | end: | |
75 | return ret; | |
76 | } | |
77 | ||
f3ed775e DG |
78 | /* |
79 | * start_tracing | |
80 | * | |
81 | * Start tracing for all trace of the session. | |
82 | */ | |
9497e2f7 | 83 | cmd_error_code start_tracing(const char *session_name) |
f3ed775e | 84 | { |
cd9adb8b | 85 | if (session_name == nullptr) { |
9497e2f7 | 86 | return CMD_ERROR; |
f3ed775e DG |
87 | } |
88 | ||
9497e2f7 | 89 | DBG("Starting tracing for session `%s`", session_name); |
f3ed775e | 90 | |
9497e2f7 | 91 | const int ret = lttng_start_tracing(session_name); |
f3ed775e | 92 | if (ret < 0) { |
f9a41357 | 93 | LTTNG_THROW_CTL(lttng::format("Failed to start session `{}`", session_name), |
9497e2f7 | 94 | static_cast<lttng_error_code>(-ret)); |
f3ed775e DG |
95 | } |
96 | ||
9497e2f7 | 97 | MSG("Tracing started for session `%s`", session_name); |
1cfc0bc8 | 98 | if (lttng_opt_mi) { |
9497e2f7 JG |
99 | if (mi_print_session(session_name, 1)) { |
100 | return CMD_ERROR; | |
1cfc0bc8 JRJ |
101 | } |
102 | } | |
f3ed775e | 103 | |
9497e2f7 | 104 | return CMD_SUCCESS; |
f3ed775e DG |
105 | } |
106 | ||
d5ed3e6f | 107 | cmd_error_code start_tracing(const lttng::cli::session_spec& spec) |
eaa8ef76 | 108 | { |
eaa8ef76 | 109 | bool had_warning = false; |
9497e2f7 JG |
110 | bool had_error = false; |
111 | bool listing_failed = false; | |
112 | ||
6e11909e | 113 | const auto sessions = [&listing_failed, &spec]() -> lttng::cli::session_list { |
9497e2f7 JG |
114 | try { |
115 | return list_sessions(spec); | |
116 | } catch (const lttng::ctl::error& ctl_exception) { | |
117 | ERR_FMT("Failed to list sessions ({})", | |
118 | lttng_strerror(-ctl_exception.code())); | |
119 | listing_failed = true; | |
120 | return {}; | |
e8c353ad JG |
121 | } catch (const lttng::cli::no_default_session_error& cli_exception) { |
122 | /* | |
123 | * The retrieval of the default session name already logs | |
124 | * an error when it fails. There is no value in printing | |
125 | * anything about this exception. | |
126 | */ | |
127 | listing_failed = true; | |
128 | return {}; | |
9497e2f7 JG |
129 | } |
130 | }(); | |
131 | ||
6e11909e JG |
132 | if (!listing_failed && sessions.size() == 0 && |
133 | spec.type_ == lttng::cli::session_spec::type::NAME) { | |
9497e2f7 JG |
134 | ERR_FMT("Session `{}` not found", spec.value); |
135 | return CMD_ERROR; | |
136 | } | |
eaa8ef76 | 137 | |
9497e2f7 JG |
138 | if (listing_failed) { |
139 | return CMD_FATAL; | |
140 | } | |
141 | ||
142 | for (const auto& session : sessions) { | |
143 | cmd_error_code sub_ret; | |
eaa8ef76 | 144 | |
9497e2f7 JG |
145 | try { |
146 | sub_ret = start_tracing(session.name); | |
147 | } catch (const lttng::ctl::error& ctl_exception) { | |
148 | switch (ctl_exception.code()) { | |
149 | case LTTNG_ERR_TRACE_ALREADY_STARTED: | |
150 | WARN_FMT("Tracing already started for session `{}`", session.name); | |
151 | sub_ret = CMD_SUCCESS; | |
152 | break; | |
153 | case LTTNG_ERR_NO_SESSION: | |
6e11909e | 154 | if (spec.type_ != lttng::cli::session_spec::type::NAME) { |
9497e2f7 JG |
155 | /* Session destroyed during command, ignore and carry-on. */ |
156 | sub_ret = CMD_SUCCESS; | |
157 | break; | |
158 | } else { | |
159 | sub_ret = CMD_ERROR; | |
160 | break; | |
161 | } | |
162 | case LTTNG_ERR_NO_SESSIOND: | |
163 | /* Don't keep going on a fatal error. */ | |
164 | return CMD_FATAL; | |
eaa8ef76 | 165 | default: |
9497e2f7 JG |
166 | /* Generic error. */ |
167 | sub_ret = CMD_ERROR; | |
168 | ERR_FMT("Failed to start session `{}` ({})", | |
169 | session.name, | |
170 | lttng_strerror(-ctl_exception.code())); | |
eaa8ef76 OD |
171 | break; |
172 | } | |
173 | } | |
eaa8ef76 | 174 | |
9497e2f7 JG |
175 | /* Keep going, but report the most serious state. */ |
176 | had_warning |= sub_ret == CMD_WARNING; | |
177 | had_error |= sub_ret == CMD_ERROR; | |
eaa8ef76 OD |
178 | } |
179 | ||
9497e2f7 JG |
180 | if (had_error) { |
181 | return CMD_ERROR; | |
182 | } else if (had_warning) { | |
183 | return CMD_WARNING; | |
184 | } else { | |
185 | return CMD_SUCCESS; | |
186 | } | |
eaa8ef76 | 187 | } |
9183bb27 | 188 | } /* namespace */ |
eaa8ef76 | 189 | |
f3ed775e DG |
190 | /* |
191 | * cmd_start | |
192 | * | |
193 | * The 'start <options>' first level command | |
194 | */ | |
195 | int cmd_start(int argc, const char **argv) | |
196 | { | |
9497e2f7 JG |
197 | int opt; |
198 | cmd_error_code command_ret = CMD_SUCCESS; | |
199 | bool success = true; | |
f3ed775e | 200 | static poptContext pc; |
cd9adb8b | 201 | const char *leftover = nullptr; |
6e11909e | 202 | lttng::cli::session_spec session_spec(lttng::cli::session_spec::type::NAME); |
f3ed775e | 203 | |
cd9adb8b | 204 | pc = poptGetContext(nullptr, argc, argv, long_options, 0); |
f3ed775e DG |
205 | poptReadDefaultConfig(pc, 0); |
206 | ||
207 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
208 | switch (opt) { | |
209 | case OPT_HELP: | |
9497e2f7 JG |
210 | { |
211 | int ret; | |
212 | ||
4ba92f18 | 213 | SHOW_HELP(); |
9497e2f7 | 214 | command_ret = static_cast<cmd_error_code>(ret); |
f3ed775e | 215 | goto end; |
9497e2f7 | 216 | } |
679b4943 SM |
217 | case OPT_LIST_OPTIONS: |
218 | list_cmd_options(stdout, long_options); | |
679b4943 | 219 | goto end; |
eaa8ef76 | 220 | case OPT_ENABLE_GLOB: |
6e11909e | 221 | session_spec.type_ = lttng::cli::session_spec::type::GLOB_PATTERN; |
eaa8ef76 OD |
222 | break; |
223 | case OPT_ALL: | |
6e11909e | 224 | session_spec.type_ = lttng::cli::session_spec::type::ALL; |
eaa8ef76 | 225 | break; |
f3ed775e | 226 | default: |
9497e2f7 | 227 | command_ret = CMD_UNDEFINED; |
f3ed775e DG |
228 | goto end; |
229 | } | |
230 | } | |
231 | ||
eaa8ef76 | 232 | session_spec.value = poptGetArg(pc); |
f3ed775e | 233 | |
68c7f6e5 JD |
234 | leftover = poptGetArg(pc); |
235 | if (leftover) { | |
236 | ERR("Unknown argument: %s", leftover); | |
9497e2f7 | 237 | command_ret = CMD_ERROR; |
68c7f6e5 JD |
238 | goto end; |
239 | } | |
240 | ||
1cfc0bc8 JRJ |
241 | /* Mi check */ |
242 | if (lttng_opt_mi) { | |
243 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
244 | if (!writer) { | |
9497e2f7 | 245 | command_ret = CMD_ERROR; |
1cfc0bc8 JRJ |
246 | goto end; |
247 | } | |
248 | ||
249 | /* Open command element */ | |
9497e2f7 JG |
250 | if (mi_lttng_writer_command_open(writer, mi_lttng_element_command_start)) { |
251 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
252 | goto end; |
253 | } | |
254 | ||
255 | /* Open output element */ | |
9497e2f7 JG |
256 | if (mi_lttng_writer_open_element(writer, mi_lttng_element_command_output)) { |
257 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
258 | goto end; |
259 | } | |
260 | ||
261 | /* | |
262 | * Open sessions element | |
263 | * For validation purpose | |
264 | */ | |
9497e2f7 JG |
265 | if (mi_lttng_writer_open_element(writer, config_element_sessions)) { |
266 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
267 | goto end; |
268 | } | |
269 | } | |
270 | ||
eaa8ef76 | 271 | command_ret = start_tracing(session_spec); |
9497e2f7 JG |
272 | if (command_ret != CMD_SUCCESS) { |
273 | success = false; | |
1cfc0bc8 JRJ |
274 | } |
275 | ||
276 | /* Mi closing */ | |
277 | if (lttng_opt_mi) { | |
278 | /* Close sessions and output element */ | |
9497e2f7 JG |
279 | if (mi_lttng_close_multi_element(writer, 2)) { |
280 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
281 | goto end; |
282 | } | |
283 | ||
284 | /* Success ? */ | |
9497e2f7 JG |
285 | if (mi_lttng_writer_write_element_bool( |
286 | writer, mi_lttng_element_command_success, success)) { | |
287 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
288 | goto end; |
289 | } | |
290 | ||
291 | /* Command element close */ | |
9497e2f7 JG |
292 | if (mi_lttng_writer_command_close(writer)) { |
293 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
294 | goto end; |
295 | } | |
296 | } | |
f3ed775e DG |
297 | |
298 | end: | |
1cfc0bc8 JRJ |
299 | /* Mi clean-up */ |
300 | if (writer && mi_lttng_writer_destroy(writer)) { | |
9497e2f7 | 301 | command_ret = CMD_ERROR; |
1cfc0bc8 JRJ |
302 | } |
303 | ||
ca1c3607 | 304 | poptFreeContext(pc); |
9497e2f7 | 305 | return command_ret; |
f3ed775e | 306 | } |