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 | */ | |
9183bb27 | 82 | int start_tracing(const char *session_name) |
f3ed775e | 83 | { |
ae856491 | 84 | int ret; |
5b915816 | 85 | |
cd9adb8b | 86 | if (session_name == nullptr) { |
5b915816 MJ |
87 | ret = CMD_ERROR; |
88 | goto error; | |
f3ed775e DG |
89 | } |
90 | ||
91 | DBG("Starting tracing for session %s", session_name); | |
92 | ||
6a4f824d | 93 | ret = lttng_start_tracing(session_name); |
f3ed775e | 94 | if (ret < 0) { |
42224349 | 95 | switch (-ret) { |
f73fabfd | 96 | case LTTNG_ERR_TRACE_ALREADY_STARTED: |
42224349 DG |
97 | WARN("Tracing already started for session %s", session_name); |
98 | break; | |
99 | default: | |
100 | ERR("%s", lttng_strerror(ret)); | |
101 | break; | |
102 | } | |
eaa8ef76 | 103 | goto error; |
f3ed775e DG |
104 | } |
105 | ||
ae856491 DG |
106 | ret = CMD_SUCCESS; |
107 | ||
f3ed775e | 108 | MSG("Tracing started for session %s", session_name); |
1cfc0bc8 JRJ |
109 | if (lttng_opt_mi) { |
110 | ret = mi_print_session(session_name, 1); | |
111 | if (ret) { | |
112 | ret = CMD_ERROR; | |
eaa8ef76 | 113 | goto error; |
1cfc0bc8 JRJ |
114 | } |
115 | } | |
f3ed775e | 116 | |
f3ed775e DG |
117 | error: |
118 | return ret; | |
119 | } | |
120 | ||
9183bb27 | 121 | int start_tracing(const struct session_spec& spec) |
eaa8ef76 OD |
122 | { |
123 | int ret = CMD_SUCCESS; | |
124 | bool had_warning = false; | |
125 | ||
126 | try { | |
127 | for (const auto& session : list_sessions(spec)) { | |
128 | const auto sub_ret = start_tracing(session.name); | |
129 | ||
130 | switch (sub_ret) { | |
131 | case CMD_WARNING: | |
132 | had_warning = true; | |
133 | /* fall-through. */ | |
134 | case CMD_SUCCESS: | |
135 | continue; | |
136 | default: | |
137 | ret = sub_ret; | |
138 | break; | |
139 | } | |
140 | } | |
141 | } catch (const std::exception& e) { | |
142 | ERR_FMT("{}", e.what()); | |
143 | return CMD_FATAL; | |
144 | } | |
145 | ||
146 | if (ret == CMD_SUCCESS && had_warning) { | |
147 | ret = CMD_WARNING; | |
148 | } | |
149 | ||
150 | return ret; | |
151 | } | |
9183bb27 | 152 | } /* namespace */ |
eaa8ef76 | 153 | |
f3ed775e DG |
154 | /* |
155 | * cmd_start | |
156 | * | |
157 | * The 'start <options>' first level command | |
158 | */ | |
159 | int cmd_start(int argc, const char **argv) | |
160 | { | |
1cfc0bc8 | 161 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 162 | static poptContext pc; |
cd9adb8b | 163 | const char *leftover = nullptr; |
eaa8ef76 OD |
164 | struct session_spec session_spec = { |
165 | .type = session_spec::NAME, | |
166 | .value = nullptr, | |
167 | }; | |
f3ed775e | 168 | |
cd9adb8b | 169 | pc = poptGetContext(nullptr, argc, argv, long_options, 0); |
f3ed775e DG |
170 | poptReadDefaultConfig(pc, 0); |
171 | ||
172 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
173 | switch (opt) { | |
174 | case OPT_HELP: | |
4ba92f18 | 175 | SHOW_HELP(); |
f3ed775e | 176 | goto end; |
679b4943 SM |
177 | case OPT_LIST_OPTIONS: |
178 | list_cmd_options(stdout, long_options); | |
679b4943 | 179 | goto end; |
eaa8ef76 OD |
180 | case OPT_ENABLE_GLOB: |
181 | session_spec.type = session_spec::GLOB_PATTERN; | |
182 | break; | |
183 | case OPT_ALL: | |
184 | session_spec.type = session_spec::ALL; | |
185 | break; | |
f3ed775e | 186 | default: |
f3ed775e DG |
187 | ret = CMD_UNDEFINED; |
188 | goto end; | |
189 | } | |
190 | } | |
191 | ||
eaa8ef76 | 192 | session_spec.value = poptGetArg(pc); |
f3ed775e | 193 | |
68c7f6e5 JD |
194 | leftover = poptGetArg(pc); |
195 | if (leftover) { | |
196 | ERR("Unknown argument: %s", leftover); | |
197 | ret = CMD_ERROR; | |
198 | goto end; | |
199 | } | |
200 | ||
1cfc0bc8 JRJ |
201 | /* Mi check */ |
202 | if (lttng_opt_mi) { | |
203 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
204 | if (!writer) { | |
205 | ret = -LTTNG_ERR_NOMEM; | |
206 | goto end; | |
207 | } | |
208 | ||
209 | /* Open command element */ | |
28ab034a | 210 | ret = mi_lttng_writer_command_open(writer, mi_lttng_element_command_start); |
1cfc0bc8 JRJ |
211 | if (ret) { |
212 | ret = CMD_ERROR; | |
213 | goto end; | |
214 | } | |
215 | ||
216 | /* Open output element */ | |
28ab034a | 217 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command_output); |
1cfc0bc8 JRJ |
218 | if (ret) { |
219 | ret = CMD_ERROR; | |
220 | goto end; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Open sessions element | |
225 | * For validation purpose | |
226 | */ | |
28ab034a | 227 | ret = mi_lttng_writer_open_element(writer, config_element_sessions); |
1cfc0bc8 JRJ |
228 | if (ret) { |
229 | ret = CMD_ERROR; | |
230 | goto end; | |
231 | } | |
232 | } | |
233 | ||
eaa8ef76 | 234 | command_ret = start_tracing(session_spec); |
1cfc0bc8 JRJ |
235 | if (command_ret) { |
236 | success = 0; | |
237 | } | |
238 | ||
239 | /* Mi closing */ | |
240 | if (lttng_opt_mi) { | |
241 | /* Close sessions and output element */ | |
242 | ret = mi_lttng_close_multi_element(writer, 2); | |
243 | if (ret) { | |
244 | ret = CMD_ERROR; | |
245 | goto end; | |
246 | } | |
247 | ||
248 | /* Success ? */ | |
28ab034a JG |
249 | ret = mi_lttng_writer_write_element_bool( |
250 | writer, mi_lttng_element_command_success, success); | |
1cfc0bc8 JRJ |
251 | if (ret) { |
252 | ret = CMD_ERROR; | |
253 | goto end; | |
254 | } | |
255 | ||
256 | /* Command element close */ | |
257 | ret = mi_lttng_writer_command_close(writer); | |
258 | if (ret) { | |
259 | ret = CMD_ERROR; | |
260 | goto end; | |
261 | } | |
262 | } | |
f3ed775e DG |
263 | |
264 | end: | |
1cfc0bc8 JRJ |
265 | /* Mi clean-up */ |
266 | if (writer && mi_lttng_writer_destroy(writer)) { | |
267 | /* Preserve original error code */ | |
268 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
269 | } | |
270 | ||
271 | /* Overwrite ret if an error occurred with start_tracing */ | |
272 | ret = command_ret ? command_ret : ret; | |
ca1c3607 | 273 | poptFreeContext(pc); |
f3ed775e DG |
274 | return ret; |
275 | } |