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" |
eaa8ef76 | 10 | #include "../utils.hpp" |
28ab034a | 11 | |
eaa8ef76 | 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> | |
23 | ||
f3ed775e DG |
24 | enum { |
25 | OPT_HELP = 1, | |
679b4943 | 26 | OPT_LIST_OPTIONS, |
eaa8ef76 OD |
27 | OPT_ENABLE_GLOB, |
28 | OPT_ALL, | |
f3ed775e DG |
29 | }; |
30 | ||
9183bb27 JG |
31 | namespace { |
32 | struct mi_writer *writer; | |
33 | ||
34 | #ifdef LTTNG_EMBED_HELP | |
35 | const char help_msg[] = | |
36 | #include <lttng-start.1.h> | |
37 | ; | |
38 | #endif | |
39 | ||
40 | struct poptOption long_options[] = { | |
f3ed775e | 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 }, | |
eaa8ef76 OD |
44 | { "glob", 'g', POPT_ARG_NONE, nullptr, OPT_ENABLE_GLOB, nullptr, nullptr }, |
45 | { "all", 'a', POPT_ARG_NONE, nullptr, OPT_ALL, nullptr, nullptr }, | |
cd9adb8b | 46 | { nullptr, 0, 0, nullptr, 0, nullptr, nullptr } |
f3ed775e DG |
47 | }; |
48 | ||
9183bb27 | 49 | int mi_print_session(const char *session_name, int enabled) |
1cfc0bc8 JRJ |
50 | { |
51 | int ret; | |
52 | ||
53 | /* Open session element */ | |
54 | ret = mi_lttng_writer_open_element(writer, config_element_session); | |
55 | if (ret) { | |
56 | goto end; | |
57 | } | |
58 | ||
59 | /* Print session name element */ | |
28ab034a | 60 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, session_name); |
1cfc0bc8 JRJ |
61 | if (ret) { |
62 | goto end; | |
63 | } | |
64 | ||
28ab034a | 65 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, enabled); |
1cfc0bc8 JRJ |
66 | if (ret) { |
67 | goto end; | |
68 | } | |
69 | ||
70 | /* Close session element */ | |
71 | ret = mi_lttng_writer_close_element(writer); | |
72 | ||
73 | end: | |
74 | return ret; | |
75 | } | |
76 | ||
f3ed775e DG |
77 | /* |
78 | * start_tracing | |
79 | * | |
80 | * Start tracing for all trace of the session. | |
81 | */ | |
9497e2f7 | 82 | cmd_error_code start_tracing(const char *session_name) |
f3ed775e | 83 | { |
cd9adb8b | 84 | if (session_name == nullptr) { |
9497e2f7 | 85 | return CMD_ERROR; |
f3ed775e DG |
86 | } |
87 | ||
9497e2f7 | 88 | DBG("Starting tracing for session `%s`", session_name); |
f3ed775e | 89 | |
9497e2f7 | 90 | const int ret = lttng_start_tracing(session_name); |
f3ed775e | 91 | if (ret < 0) { |
9497e2f7 JG |
92 | LTTNG_THROW_CTL(fmt::format("Failed to start session `{}`", session_name), |
93 | static_cast<lttng_error_code>(-ret)); | |
f3ed775e DG |
94 | } |
95 | ||
9497e2f7 | 96 | MSG("Tracing started for session `%s`", session_name); |
1cfc0bc8 | 97 | if (lttng_opt_mi) { |
9497e2f7 JG |
98 | if (mi_print_session(session_name, 1)) { |
99 | return CMD_ERROR; | |
1cfc0bc8 JRJ |
100 | } |
101 | } | |
f3ed775e | 102 | |
9497e2f7 | 103 | return CMD_SUCCESS; |
f3ed775e DG |
104 | } |
105 | ||
6e11909e | 106 | cmd_error_code start_tracing(const lttng::cli::session_spec& spec) noexcept |
eaa8ef76 | 107 | { |
eaa8ef76 | 108 | bool had_warning = false; |
9497e2f7 JG |
109 | bool had_error = false; |
110 | bool listing_failed = false; | |
111 | ||
6e11909e | 112 | const auto sessions = [&listing_failed, &spec]() -> lttng::cli::session_list { |
9497e2f7 JG |
113 | try { |
114 | return list_sessions(spec); | |
115 | } catch (const lttng::ctl::error& ctl_exception) { | |
116 | ERR_FMT("Failed to list sessions ({})", | |
117 | lttng_strerror(-ctl_exception.code())); | |
118 | listing_failed = true; | |
119 | return {}; | |
120 | } | |
121 | }(); | |
122 | ||
6e11909e JG |
123 | if (!listing_failed && sessions.size() == 0 && |
124 | spec.type_ == lttng::cli::session_spec::type::NAME) { | |
9497e2f7 JG |
125 | ERR_FMT("Session `{}` not found", spec.value); |
126 | return CMD_ERROR; | |
127 | } | |
eaa8ef76 | 128 | |
9497e2f7 JG |
129 | if (listing_failed) { |
130 | return CMD_FATAL; | |
131 | } | |
132 | ||
133 | for (const auto& session : sessions) { | |
134 | cmd_error_code sub_ret; | |
eaa8ef76 | 135 | |
9497e2f7 JG |
136 | try { |
137 | sub_ret = start_tracing(session.name); | |
138 | } catch (const lttng::ctl::error& ctl_exception) { | |
139 | switch (ctl_exception.code()) { | |
140 | case LTTNG_ERR_TRACE_ALREADY_STARTED: | |
141 | WARN_FMT("Tracing already started for session `{}`", session.name); | |
142 | sub_ret = CMD_SUCCESS; | |
143 | break; | |
144 | case LTTNG_ERR_NO_SESSION: | |
6e11909e | 145 | if (spec.type_ != lttng::cli::session_spec::type::NAME) { |
9497e2f7 JG |
146 | /* Session destroyed during command, ignore and carry-on. */ |
147 | sub_ret = CMD_SUCCESS; | |
148 | break; | |
149 | } else { | |
150 | sub_ret = CMD_ERROR; | |
151 | break; | |
152 | } | |
153 | case LTTNG_ERR_NO_SESSIOND: | |
154 | /* Don't keep going on a fatal error. */ | |
155 | return CMD_FATAL; | |
eaa8ef76 | 156 | default: |
9497e2f7 JG |
157 | /* Generic error. */ |
158 | sub_ret = CMD_ERROR; | |
159 | ERR_FMT("Failed to start session `{}` ({})", | |
160 | session.name, | |
161 | lttng_strerror(-ctl_exception.code())); | |
eaa8ef76 OD |
162 | break; |
163 | } | |
164 | } | |
eaa8ef76 | 165 | |
9497e2f7 JG |
166 | /* Keep going, but report the most serious state. */ |
167 | had_warning |= sub_ret == CMD_WARNING; | |
168 | had_error |= sub_ret == CMD_ERROR; | |
eaa8ef76 OD |
169 | } |
170 | ||
9497e2f7 JG |
171 | if (had_error) { |
172 | return CMD_ERROR; | |
173 | } else if (had_warning) { | |
174 | return CMD_WARNING; | |
175 | } else { | |
176 | return CMD_SUCCESS; | |
177 | } | |
eaa8ef76 | 178 | } |
9183bb27 | 179 | } /* namespace */ |
eaa8ef76 | 180 | |
f3ed775e DG |
181 | /* |
182 | * cmd_start | |
183 | * | |
184 | * The 'start <options>' first level command | |
185 | */ | |
186 | int cmd_start(int argc, const char **argv) | |
187 | { | |
9497e2f7 JG |
188 | int opt; |
189 | cmd_error_code command_ret = CMD_SUCCESS; | |
190 | bool success = true; | |
f3ed775e | 191 | static poptContext pc; |
cd9adb8b | 192 | const char *leftover = nullptr; |
6e11909e | 193 | lttng::cli::session_spec session_spec(lttng::cli::session_spec::type::NAME); |
f3ed775e | 194 | |
cd9adb8b | 195 | pc = poptGetContext(nullptr, argc, argv, long_options, 0); |
f3ed775e DG |
196 | poptReadDefaultConfig(pc, 0); |
197 | ||
198 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
199 | switch (opt) { | |
200 | case OPT_HELP: | |
9497e2f7 JG |
201 | { |
202 | int ret; | |
203 | ||
4ba92f18 | 204 | SHOW_HELP(); |
9497e2f7 | 205 | command_ret = static_cast<cmd_error_code>(ret); |
f3ed775e | 206 | goto end; |
9497e2f7 | 207 | } |
679b4943 SM |
208 | case OPT_LIST_OPTIONS: |
209 | list_cmd_options(stdout, long_options); | |
679b4943 | 210 | goto end; |
eaa8ef76 | 211 | case OPT_ENABLE_GLOB: |
6e11909e | 212 | session_spec.type_ = lttng::cli::session_spec::type::GLOB_PATTERN; |
eaa8ef76 OD |
213 | break; |
214 | case OPT_ALL: | |
6e11909e | 215 | session_spec.type_ = lttng::cli::session_spec::type::ALL; |
eaa8ef76 | 216 | break; |
f3ed775e | 217 | default: |
9497e2f7 | 218 | command_ret = CMD_UNDEFINED; |
f3ed775e DG |
219 | goto end; |
220 | } | |
221 | } | |
222 | ||
eaa8ef76 | 223 | session_spec.value = poptGetArg(pc); |
f3ed775e | 224 | |
68c7f6e5 JD |
225 | leftover = poptGetArg(pc); |
226 | if (leftover) { | |
227 | ERR("Unknown argument: %s", leftover); | |
9497e2f7 | 228 | command_ret = CMD_ERROR; |
68c7f6e5 JD |
229 | goto end; |
230 | } | |
231 | ||
1cfc0bc8 JRJ |
232 | /* Mi check */ |
233 | if (lttng_opt_mi) { | |
234 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
235 | if (!writer) { | |
9497e2f7 | 236 | command_ret = CMD_ERROR; |
1cfc0bc8 JRJ |
237 | goto end; |
238 | } | |
239 | ||
240 | /* Open command element */ | |
9497e2f7 JG |
241 | if (mi_lttng_writer_command_open(writer, mi_lttng_element_command_start)) { |
242 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
243 | goto end; |
244 | } | |
245 | ||
246 | /* Open output element */ | |
9497e2f7 JG |
247 | if (mi_lttng_writer_open_element(writer, mi_lttng_element_command_output)) { |
248 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
249 | goto end; |
250 | } | |
251 | ||
252 | /* | |
253 | * Open sessions element | |
254 | * For validation purpose | |
255 | */ | |
9497e2f7 JG |
256 | if (mi_lttng_writer_open_element(writer, config_element_sessions)) { |
257 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
258 | goto end; |
259 | } | |
260 | } | |
261 | ||
eaa8ef76 | 262 | command_ret = start_tracing(session_spec); |
9497e2f7 JG |
263 | if (command_ret != CMD_SUCCESS) { |
264 | success = false; | |
1cfc0bc8 JRJ |
265 | } |
266 | ||
267 | /* Mi closing */ | |
268 | if (lttng_opt_mi) { | |
269 | /* Close sessions and output element */ | |
9497e2f7 JG |
270 | if (mi_lttng_close_multi_element(writer, 2)) { |
271 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
272 | goto end; |
273 | } | |
274 | ||
275 | /* Success ? */ | |
9497e2f7 JG |
276 | if (mi_lttng_writer_write_element_bool( |
277 | writer, mi_lttng_element_command_success, success)) { | |
278 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
279 | goto end; |
280 | } | |
281 | ||
282 | /* Command element close */ | |
9497e2f7 JG |
283 | if (mi_lttng_writer_command_close(writer)) { |
284 | command_ret = CMD_ERROR; | |
1cfc0bc8 JRJ |
285 | goto end; |
286 | } | |
287 | } | |
f3ed775e DG |
288 | |
289 | end: | |
1cfc0bc8 JRJ |
290 | /* Mi clean-up */ |
291 | if (writer && mi_lttng_writer_destroy(writer)) { | |
9497e2f7 | 292 | command_ret = CMD_ERROR; |
1cfc0bc8 JRJ |
293 | } |
294 | ||
ca1c3607 | 295 | poptFreeContext(pc); |
9497e2f7 | 296 | return command_ret; |
f3ed775e | 297 | } |