Commit | Line | Data |
---|---|---|
f3ed775e | 1 | /* |
a4eb26f0 | 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> | |
e5b83100 | 16 | #include <assert.h> |
f3ed775e | 17 | |
42224349 | 18 | #include <common/sessiond-comm/sessiond-comm.h> |
e5b83100 JRJ |
19 | #include <common/mi-lttng.h> |
20 | ||
21 | #include "../command.h" | |
42224349 | 22 | |
38ee087f | 23 | static int opt_no_wait; |
e5b83100 | 24 | static struct mi_writer *writer; |
f3ed775e | 25 | |
4fc83d94 PP |
26 | #ifdef LTTNG_EMBED_HELP |
27 | static const char help_msg[] = | |
28 | #include <lttng-stop.1.h> | |
29 | ; | |
30 | #endif | |
31 | ||
f3ed775e DG |
32 | enum { |
33 | OPT_HELP = 1, | |
679b4943 | 34 | OPT_LIST_OPTIONS, |
f3ed775e DG |
35 | }; |
36 | ||
37 | static struct poptOption long_options[] = { | |
38 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
39 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
679b4943 | 40 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
38ee087f | 41 | {"no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0}, |
f3ed775e DG |
42 | {0, 0, 0, 0, 0, 0, 0} |
43 | }; | |
44 | ||
e5b83100 JRJ |
45 | /* |
46 | * Mi print of partial session | |
47 | */ | |
48 | static int mi_print_session(char *session_name, int enabled) | |
49 | { | |
50 | int ret; | |
51 | assert(writer); | |
52 | assert(session_name); | |
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 */ | |
61 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, | |
62 | session_name); | |
63 | if (ret) { | |
64 | goto end; | |
65 | } | |
66 | ||
67 | /* Is enabled ? */ | |
68 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, | |
69 | enabled); | |
70 | if (ret) { | |
71 | goto end; | |
72 | } | |
73 | ||
74 | /* Close session element */ | |
75 | ret = mi_lttng_writer_close_element(writer); | |
76 | ||
77 | end: | |
78 | return ret; | |
79 | } | |
f3ed775e DG |
80 | |
81 | /* | |
cd80958d | 82 | * Start tracing for all trace of the session. |
f3ed775e | 83 | */ |
d569ed5f | 84 | static int stop_tracing(const char *arg_session_name) |
f3ed775e | 85 | { |
ae856491 | 86 | int ret; |
f3ed775e DG |
87 | char *session_name; |
88 | ||
d569ed5f | 89 | if (arg_session_name == NULL) { |
f3ed775e | 90 | session_name = get_session_name(); |
d569ed5f MJ |
91 | } else { |
92 | session_name = strdup(arg_session_name); | |
f3ed775e | 93 | if (session_name == NULL) { |
d569ed5f | 94 | PERROR("Failed to copy session name"); |
f3ed775e | 95 | } |
d569ed5f MJ |
96 | } |
97 | ||
98 | if (session_name == NULL) { | |
99 | ret = CMD_ERROR; | |
100 | goto error; | |
f3ed775e DG |
101 | } |
102 | ||
8eb7a5e2 | 103 | ret = lttng_stop_tracing_no_wait(session_name); |
f3ed775e | 104 | if (ret < 0) { |
42224349 | 105 | switch (-ret) { |
f73fabfd | 106 | case LTTNG_ERR_TRACE_ALREADY_STOPPED: |
42224349 DG |
107 | WARN("Tracing already stopped for session %s", session_name); |
108 | break; | |
109 | default: | |
110 | ERR("%s", lttng_strerror(ret)); | |
111 | break; | |
112 | } | |
f3ed775e DG |
113 | goto free_name; |
114 | } | |
115 | ||
8eb7a5e2 JG |
116 | if (!opt_no_wait) { |
117 | _MSG("Waiting for data availability"); | |
118 | fflush(stdout); | |
119 | do { | |
120 | ret = lttng_data_pending(session_name); | |
121 | if (ret < 0) { | |
122 | /* Return the data available call error. */ | |
e5b83100 | 123 | goto free_name; |
8eb7a5e2 JG |
124 | } |
125 | ||
126 | /* | |
127 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
128 | * returned value indicates availability. | |
129 | */ | |
130 | if (ret) { | |
c8f61fd4 | 131 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
8eb7a5e2 JG |
132 | _MSG("."); |
133 | fflush(stdout); | |
134 | } | |
135 | } while (ret != 0); | |
136 | MSG(""); | |
137 | } | |
138 | ||
ae856491 DG |
139 | ret = CMD_SUCCESS; |
140 | ||
20fb9e02 | 141 | print_session_stats(session_name); |
f3ed775e | 142 | MSG("Tracing stopped for session %s", session_name); |
e5b83100 JRJ |
143 | if (lttng_opt_mi) { |
144 | ret = mi_print_session(session_name, 0); | |
145 | if (ret) { | |
146 | goto free_name; | |
147 | } | |
148 | } | |
f3ed775e DG |
149 | |
150 | free_name: | |
d569ed5f | 151 | free(session_name); |
cd80958d | 152 | |
f3ed775e DG |
153 | error: |
154 | return ret; | |
155 | } | |
156 | ||
157 | /* | |
158 | * cmd_stop | |
159 | * | |
160 | * The 'stop <options>' first level command | |
161 | */ | |
162 | int cmd_stop(int argc, const char **argv) | |
163 | { | |
e5b83100 | 164 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 165 | static poptContext pc; |
d569ed5f | 166 | const char *arg_session_name = NULL; |
68c7f6e5 | 167 | const char *leftover = NULL; |
f3ed775e DG |
168 | |
169 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
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; |
f3ed775e | 180 | default: |
f3ed775e DG |
181 | ret = CMD_UNDEFINED; |
182 | goto end; | |
183 | } | |
184 | } | |
185 | ||
e5b83100 JRJ |
186 | /* Mi check */ |
187 | if (lttng_opt_mi) { | |
188 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
189 | if (!writer) { | |
190 | ret = -LTTNG_ERR_NOMEM; | |
191 | goto end; | |
192 | } | |
193 | ||
194 | /* Open command element */ | |
195 | ret = mi_lttng_writer_command_open(writer, | |
196 | mi_lttng_element_command_stop); | |
197 | if (ret) { | |
198 | ret = CMD_ERROR; | |
199 | goto end; | |
200 | } | |
201 | ||
202 | /* Open output element */ | |
203 | ret = mi_lttng_writer_open_element(writer, | |
204 | mi_lttng_element_command_output); | |
205 | if (ret) { | |
206 | ret = CMD_ERROR; | |
207 | goto end; | |
208 | } | |
209 | ||
210 | /* | |
211 | * Open sessions element | |
212 | * For validation | |
213 | */ | |
214 | ret = mi_lttng_writer_open_element(writer, | |
215 | config_element_sessions); | |
216 | if (ret) { | |
217 | ret = CMD_ERROR; | |
218 | goto end; | |
219 | } | |
220 | } | |
221 | ||
d569ed5f | 222 | arg_session_name = poptGetArg(pc); |
f3ed775e | 223 | |
68c7f6e5 JD |
224 | leftover = poptGetArg(pc); |
225 | if (leftover) { | |
226 | ERR("Unknown argument: %s", leftover); | |
227 | ret = CMD_ERROR; | |
228 | goto end; | |
229 | } | |
230 | ||
d569ed5f | 231 | command_ret = stop_tracing(arg_session_name); |
e5b83100 JRJ |
232 | if (command_ret) { |
233 | success = 0; | |
234 | } | |
235 | ||
236 | /* Mi closing */ | |
237 | if (lttng_opt_mi) { | |
238 | /* Close sessions and output element */ | |
239 | ret = mi_lttng_close_multi_element(writer, 2); | |
240 | if (ret) { | |
241 | ret = CMD_ERROR; | |
242 | goto end; | |
243 | } | |
244 | ||
245 | /* Success ? */ | |
246 | ret = mi_lttng_writer_write_element_bool(writer, | |
247 | mi_lttng_element_command_success, success); | |
248 | if (ret) { | |
249 | ret = CMD_ERROR; | |
250 | goto end; | |
251 | } | |
252 | ||
253 | /* Command element close */ | |
254 | ret = mi_lttng_writer_command_close(writer); | |
255 | if (ret) { | |
256 | ret = CMD_ERROR; | |
257 | goto end; | |
258 | } | |
259 | } | |
f3ed775e DG |
260 | |
261 | end: | |
e5b83100 JRJ |
262 | /* Mi clean-up */ |
263 | if (writer && mi_lttng_writer_destroy(writer)) { | |
264 | /* Preserve original error code */ | |
265 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
266 | } | |
267 | ||
268 | /* Overwrite ret if an error occurred in stop_tracing() */ | |
269 | ret = command_ret ? command_ret : ret; | |
270 | ||
ca1c3607 | 271 | poptFreeContext(pc); |
f3ed775e DG |
272 | return ret; |
273 | } |