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 |
f3ed775e DG |
9 | #include <popt.h> |
10 | #include <stdio.h> | |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <sys/stat.h> | |
14 | #include <sys/types.h> | |
15 | #include <unistd.h> | |
f3ed775e | 16 | |
c9e313bc SM |
17 | #include <common/sessiond-comm/sessiond-comm.hpp> |
18 | #include <common/mi-lttng.hpp> | |
e5b83100 | 19 | |
c9e313bc | 20 | #include "../command.hpp" |
42224349 | 21 | |
38ee087f | 22 | static int opt_no_wait; |
e5b83100 | 23 | static struct mi_writer *writer; |
f3ed775e | 24 | |
4fc83d94 PP |
25 | #ifdef LTTNG_EMBED_HELP |
26 | static const char help_msg[] = | |
27 | #include <lttng-stop.1.h> | |
28 | ; | |
29 | #endif | |
30 | ||
f3ed775e DG |
31 | enum { |
32 | OPT_HELP = 1, | |
679b4943 | 33 | OPT_LIST_OPTIONS, |
f3ed775e DG |
34 | }; |
35 | ||
36 | static struct poptOption long_options[] = { | |
37 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
38 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
679b4943 | 39 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
38ee087f | 40 | {"no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0}, |
f3ed775e DG |
41 | {0, 0, 0, 0, 0, 0, 0} |
42 | }; | |
43 | ||
e5b83100 JRJ |
44 | /* |
45 | * Mi print of partial session | |
46 | */ | |
47 | static int mi_print_session(char *session_name, int enabled) | |
48 | { | |
49 | int ret; | |
a0377dfe FD |
50 | LTTNG_ASSERT(writer); |
51 | LTTNG_ASSERT(session_name); | |
e5b83100 JRJ |
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 */ | |
60 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, | |
61 | session_name); | |
62 | if (ret) { | |
63 | goto end; | |
64 | } | |
65 | ||
66 | /* Is enabled ? */ | |
67 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, | |
68 | enabled); | |
69 | if (ret) { | |
70 | goto end; | |
71 | } | |
72 | ||
73 | /* Close session element */ | |
74 | ret = mi_lttng_writer_close_element(writer); | |
75 | ||
76 | end: | |
77 | return ret; | |
78 | } | |
f3ed775e DG |
79 | |
80 | /* | |
cd80958d | 81 | * Start tracing for all trace of the session. |
f3ed775e | 82 | */ |
5b915816 | 83 | static int stop_tracing(const char *arg_session_name) |
f3ed775e | 84 | { |
ae856491 | 85 | int ret; |
f3ed775e DG |
86 | char *session_name; |
87 | ||
5b915816 | 88 | if (arg_session_name == NULL) { |
f3ed775e | 89 | session_name = get_session_name(); |
5b915816 MJ |
90 | } else { |
91 | session_name = strdup(arg_session_name); | |
f3ed775e | 92 | if (session_name == NULL) { |
5b915816 | 93 | PERROR("Failed to copy session name"); |
f3ed775e | 94 | } |
5b915816 MJ |
95 | } |
96 | ||
97 | if (session_name == NULL) { | |
98 | ret = CMD_ERROR; | |
99 | goto error; | |
f3ed775e DG |
100 | } |
101 | ||
8eb7a5e2 | 102 | ret = lttng_stop_tracing_no_wait(session_name); |
f3ed775e | 103 | if (ret < 0) { |
42224349 | 104 | switch (-ret) { |
f73fabfd | 105 | case LTTNG_ERR_TRACE_ALREADY_STOPPED: |
42224349 DG |
106 | WARN("Tracing already stopped for session %s", session_name); |
107 | break; | |
108 | default: | |
109 | ERR("%s", lttng_strerror(ret)); | |
110 | break; | |
111 | } | |
f3ed775e DG |
112 | goto free_name; |
113 | } | |
114 | ||
8eb7a5e2 JG |
115 | if (!opt_no_wait) { |
116 | _MSG("Waiting for data availability"); | |
117 | fflush(stdout); | |
118 | do { | |
119 | ret = lttng_data_pending(session_name); | |
120 | if (ret < 0) { | |
121 | /* Return the data available call error. */ | |
e5b83100 | 122 | goto free_name; |
8eb7a5e2 JG |
123 | } |
124 | ||
125 | /* | |
126 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
127 | * returned value indicates availability. | |
128 | */ | |
129 | if (ret) { | |
c8f61fd4 | 130 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
8eb7a5e2 JG |
131 | _MSG("."); |
132 | fflush(stdout); | |
133 | } | |
134 | } while (ret != 0); | |
135 | MSG(""); | |
136 | } | |
137 | ||
ae856491 DG |
138 | ret = CMD_SUCCESS; |
139 | ||
20fb9e02 | 140 | print_session_stats(session_name); |
f3ed775e | 141 | MSG("Tracing stopped for session %s", session_name); |
e5b83100 JRJ |
142 | if (lttng_opt_mi) { |
143 | ret = mi_print_session(session_name, 0); | |
144 | if (ret) { | |
145 | goto free_name; | |
146 | } | |
147 | } | |
f3ed775e DG |
148 | |
149 | free_name: | |
5b915816 | 150 | free(session_name); |
cd80958d | 151 | |
f3ed775e DG |
152 | error: |
153 | return ret; | |
154 | } | |
155 | ||
156 | /* | |
157 | * cmd_stop | |
158 | * | |
159 | * The 'stop <options>' first level command | |
160 | */ | |
161 | int cmd_stop(int argc, const char **argv) | |
162 | { | |
e5b83100 | 163 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 164 | static poptContext pc; |
5b915816 | 165 | const char *arg_session_name = NULL; |
68c7f6e5 | 166 | const char *leftover = NULL; |
f3ed775e DG |
167 | |
168 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
169 | poptReadDefaultConfig(pc, 0); | |
170 | ||
171 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
172 | switch (opt) { | |
173 | case OPT_HELP: | |
4ba92f18 | 174 | SHOW_HELP(); |
f3ed775e | 175 | goto end; |
679b4943 SM |
176 | case OPT_LIST_OPTIONS: |
177 | list_cmd_options(stdout, long_options); | |
679b4943 | 178 | goto end; |
f3ed775e | 179 | default: |
f3ed775e DG |
180 | ret = CMD_UNDEFINED; |
181 | goto end; | |
182 | } | |
183 | } | |
184 | ||
e5b83100 JRJ |
185 | /* Mi check */ |
186 | if (lttng_opt_mi) { | |
187 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
188 | if (!writer) { | |
189 | ret = -LTTNG_ERR_NOMEM; | |
190 | goto end; | |
191 | } | |
192 | ||
193 | /* Open command element */ | |
194 | ret = mi_lttng_writer_command_open(writer, | |
195 | mi_lttng_element_command_stop); | |
196 | if (ret) { | |
197 | ret = CMD_ERROR; | |
198 | goto end; | |
199 | } | |
200 | ||
201 | /* Open output element */ | |
202 | ret = mi_lttng_writer_open_element(writer, | |
203 | mi_lttng_element_command_output); | |
204 | if (ret) { | |
205 | ret = CMD_ERROR; | |
206 | goto end; | |
207 | } | |
208 | ||
209 | /* | |
210 | * Open sessions element | |
211 | * For validation | |
212 | */ | |
213 | ret = mi_lttng_writer_open_element(writer, | |
214 | config_element_sessions); | |
215 | if (ret) { | |
216 | ret = CMD_ERROR; | |
217 | goto end; | |
218 | } | |
219 | } | |
220 | ||
5b915816 | 221 | arg_session_name = poptGetArg(pc); |
f3ed775e | 222 | |
68c7f6e5 JD |
223 | leftover = poptGetArg(pc); |
224 | if (leftover) { | |
225 | ERR("Unknown argument: %s", leftover); | |
226 | ret = CMD_ERROR; | |
227 | goto end; | |
228 | } | |
229 | ||
5b915816 | 230 | command_ret = stop_tracing(arg_session_name); |
e5b83100 JRJ |
231 | if (command_ret) { |
232 | success = 0; | |
233 | } | |
234 | ||
235 | /* Mi closing */ | |
236 | if (lttng_opt_mi) { | |
237 | /* Close sessions and output element */ | |
238 | ret = mi_lttng_close_multi_element(writer, 2); | |
239 | if (ret) { | |
240 | ret = CMD_ERROR; | |
241 | goto end; | |
242 | } | |
243 | ||
244 | /* Success ? */ | |
245 | ret = mi_lttng_writer_write_element_bool(writer, | |
246 | mi_lttng_element_command_success, success); | |
247 | if (ret) { | |
248 | ret = CMD_ERROR; | |
249 | goto end; | |
250 | } | |
251 | ||
252 | /* Command element close */ | |
253 | ret = mi_lttng_writer_command_close(writer); | |
254 | if (ret) { | |
255 | ret = CMD_ERROR; | |
256 | goto end; | |
257 | } | |
258 | } | |
f3ed775e DG |
259 | |
260 | end: | |
e5b83100 JRJ |
261 | /* Mi clean-up */ |
262 | if (writer && mi_lttng_writer_destroy(writer)) { | |
263 | /* Preserve original error code */ | |
264 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
265 | } | |
266 | ||
267 | /* Overwrite ret if an error occurred in stop_tracing() */ | |
268 | ret = command_ret ? command_ret : ret; | |
269 | ||
ca1c3607 | 270 | poptFreeContext(pc); |
f3ed775e DG |
271 | return ret; |
272 | } |