Commit | Line | Data |
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26cc6b4e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
26cc6b4e DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
26cc6b4e DG |
16 | */ |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
26cc6b4e DG |
19 | #include <popt.h> |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/types.h> | |
25 | #include <unistd.h> | |
50534d6f JRJ |
26 | #include <assert.h> |
27 | ||
28 | #include <common/mi-lttng.h> | |
26cc6b4e | 29 | |
c399183f | 30 | #include "../command.h" |
26cc6b4e DG |
31 | |
32 | static char *opt_channels; | |
e14f64a8 | 33 | static int opt_kernel; |
5440dc42 | 34 | static char *opt_session_name; |
26cc6b4e | 35 | static int opt_userspace; |
26cc6b4e | 36 | |
4fc83d94 PP |
37 | #ifdef LTTNG_EMBED_HELP |
38 | static const char help_msg[] = | |
39 | #include <lttng-disable-channel.1.h> | |
40 | ; | |
41 | #endif | |
42 | ||
26cc6b4e DG |
43 | enum { |
44 | OPT_HELP = 1, | |
45 | OPT_USERSPACE, | |
679b4943 | 46 | OPT_LIST_OPTIONS, |
26cc6b4e DG |
47 | }; |
48 | ||
cd80958d | 49 | static struct lttng_handle *handle; |
50534d6f | 50 | static struct mi_writer *writer; |
cd80958d | 51 | |
26cc6b4e DG |
52 | static struct poptOption long_options[] = { |
53 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
54 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 55 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
26cc6b4e | 56 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
d78d6610 | 57 | {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, |
679b4943 | 58 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
26cc6b4e DG |
59 | {0, 0, 0, 0, 0, 0, 0} |
60 | }; | |
61 | ||
50534d6f JRJ |
62 | static int mi_partial_channel_print(char *channel_name, unsigned int enabled, |
63 | int success) | |
64 | { | |
65 | int ret; | |
66 | ||
67 | assert(writer); | |
68 | assert(channel_name); | |
69 | ||
70 | /* Open channel element */ | |
71 | ret = mi_lttng_writer_open_element(writer, config_element_channel); | |
72 | if (ret) { | |
73 | goto end; | |
74 | } | |
75 | ||
76 | /* Name */ | |
77 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, | |
78 | channel_name); | |
79 | if (ret) { | |
80 | goto end; | |
81 | } | |
82 | ||
83 | /* Enabled ? */ | |
84 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, | |
85 | enabled); | |
86 | if (ret) { | |
87 | goto end; | |
88 | } | |
89 | ||
90 | /* Success ? */ | |
91 | ret = mi_lttng_writer_write_element_bool(writer, | |
9618049b | 92 | mi_lttng_element_success, success); |
50534d6f JRJ |
93 | if (ret) { |
94 | goto end; | |
95 | } | |
96 | ||
97 | /* Closing channel element */ | |
98 | ret = mi_lttng_writer_close_element(writer); | |
99 | ||
100 | end: | |
101 | return ret; | |
102 | } | |
103 | ||
26cc6b4e | 104 | /* |
cd80958d | 105 | * Disabling channel using the lttng API. |
26cc6b4e | 106 | */ |
cd80958d | 107 | static int disable_channels(char *session_name) |
26cc6b4e | 108 | { |
50534d6f JRJ |
109 | int ret = CMD_SUCCESS, warn = 0, success; |
110 | ||
111 | /* Normal case for disable channed is enabled = 0 */ | |
112 | unsigned int enabled = 0; | |
26cc6b4e | 113 | char *channel_name; |
7d29a247 | 114 | struct lttng_domain dom; |
26cc6b4e | 115 | |
441c16a7 MD |
116 | memset(&dom, 0, sizeof(dom)); |
117 | ||
d78d6610 | 118 | /* Create lttng domain */ |
7d29a247 DG |
119 | if (opt_kernel) { |
120 | dom.type = LTTNG_DOMAIN_KERNEL; | |
d78d6610 | 121 | } else if (opt_userspace) { |
78f0bacd | 122 | dom.type = LTTNG_DOMAIN_UST; |
78f0bacd | 123 | } else { |
3ecec76a PP |
124 | /* Checked by the caller. */ |
125 | assert(0); | |
7d29a247 DG |
126 | } |
127 | ||
cd80958d DG |
128 | handle = lttng_create_handle(session_name, &dom); |
129 | if (handle == NULL) { | |
130 | ret = -1; | |
131 | goto error; | |
132 | } | |
133 | ||
50534d6f JRJ |
134 | /* Prepare MI */ |
135 | if (lttng_opt_mi) { | |
136 | /* open a channels element */ | |
137 | ret = mi_lttng_writer_open_element(writer, config_element_channels); | |
138 | if (ret) { | |
139 | ret = CMD_ERROR; | |
140 | goto error; | |
141 | } | |
142 | ||
143 | } | |
144 | ||
26cc6b4e DG |
145 | /* Strip channel list */ |
146 | channel_name = strtok(opt_channels, ","); | |
147 | while (channel_name != NULL) { | |
78f0bacd DG |
148 | DBG("Disabling channel %s", channel_name); |
149 | ||
150 | ret = lttng_disable_channel(handle, channel_name); | |
151 | if (ret < 0) { | |
ae856491 DG |
152 | ERR("Channel %s: %s (session %s)", channel_name, |
153 | lttng_strerror(ret), session_name); | |
154 | warn = 1; | |
50534d6f JRJ |
155 | |
156 | /* | |
157 | * Mi: | |
158 | * We assume that if an error occurred the channel is still active. | |
159 | * This might not be the case but is a good assumption. | |
9618049b JRJ |
160 | * The client should look at the stderr stream |
161 | * for more informations. | |
50534d6f JRJ |
162 | */ |
163 | enabled = 1; | |
164 | success = 0; | |
165 | ||
26cc6b4e | 166 | } else { |
7885e399 | 167 | MSG("%s channel %s disabled for session %s", |
b9dfb167 | 168 | get_domain_str(dom.type), channel_name, session_name); |
50534d6f JRJ |
169 | enabled = 0; |
170 | success = 1; | |
171 | } | |
172 | ||
173 | /* Print the channel */ | |
174 | if (lttng_opt_mi) { | |
175 | ret = mi_partial_channel_print(channel_name, enabled, success); | |
176 | if (ret) { | |
177 | ret = CMD_ERROR; | |
178 | goto error; | |
179 | } | |
26cc6b4e DG |
180 | } |
181 | ||
182 | /* Next channel */ | |
183 | channel_name = strtok(NULL, ","); | |
184 | } | |
185 | ||
ae856491 DG |
186 | ret = CMD_SUCCESS; |
187 | ||
50534d6f JRJ |
188 | /* Close Mi */ |
189 | if (lttng_opt_mi) { | |
190 | /* Close channels element */ | |
191 | ret = mi_lttng_writer_close_element(writer); | |
192 | if (ret) { | |
193 | ret = CMD_ERROR; | |
194 | goto error; | |
195 | } | |
196 | } | |
197 | ||
26cc6b4e | 198 | error: |
50534d6f JRJ |
199 | /* Bypass the warning if a more important error happened */ |
200 | if (!ret && warn) { | |
ae856491 DG |
201 | ret = CMD_WARNING; |
202 | } | |
203 | ||
cd80958d DG |
204 | lttng_destroy_handle(handle); |
205 | ||
26cc6b4e DG |
206 | return ret; |
207 | } | |
208 | ||
209 | /* | |
210 | * cmd_disable_channels | |
211 | * | |
212 | * Disable channel to trace session | |
213 | */ | |
214 | int cmd_disable_channels(int argc, const char **argv) | |
215 | { | |
50534d6f | 216 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
26cc6b4e | 217 | static poptContext pc; |
cd80958d | 218 | char *session_name = NULL; |
26cc6b4e DG |
219 | |
220 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
221 | poptReadDefaultConfig(pc, 0); | |
222 | ||
223 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
224 | switch (opt) { | |
225 | case OPT_HELP: | |
4ba92f18 | 226 | SHOW_HELP(); |
26cc6b4e DG |
227 | goto end; |
228 | case OPT_USERSPACE: | |
229 | opt_userspace = 1; | |
230 | break; | |
679b4943 SM |
231 | case OPT_LIST_OPTIONS: |
232 | list_cmd_options(stdout, long_options); | |
679b4943 | 233 | goto end; |
26cc6b4e | 234 | default: |
26cc6b4e DG |
235 | ret = CMD_UNDEFINED; |
236 | goto end; | |
237 | } | |
238 | } | |
239 | ||
3ecec76a PP |
240 | ret = print_missing_or_multiple_domains(opt_kernel + opt_userspace); |
241 | if (ret) { | |
242 | ret = CMD_ERROR; | |
243 | goto end; | |
244 | } | |
245 | ||
26cc6b4e DG |
246 | opt_channels = (char*) poptGetArg(pc); |
247 | if (opt_channels == NULL) { | |
248 | ERR("Missing channel name(s).\n"); | |
ca1c3607 | 249 | ret = CMD_ERROR; |
26cc6b4e DG |
250 | goto end; |
251 | } | |
252 | ||
cd80958d DG |
253 | if (!opt_session_name) { |
254 | session_name = get_session_name(); | |
255 | if (session_name == NULL) { | |
ca1c3607 | 256 | ret = CMD_ERROR; |
cd80958d DG |
257 | goto end; |
258 | } | |
259 | } else { | |
260 | session_name = opt_session_name; | |
261 | } | |
262 | ||
50534d6f JRJ |
263 | /* Mi check */ |
264 | if (lttng_opt_mi) { | |
265 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
266 | if (!writer) { | |
267 | ret = -LTTNG_ERR_NOMEM; | |
268 | goto end; | |
269 | } | |
270 | ||
271 | /* Open command element */ | |
272 | ret = mi_lttng_writer_command_open(writer, | |
273 | mi_lttng_element_command_disable_channel); | |
274 | if (ret) { | |
275 | ret = CMD_ERROR; | |
276 | goto end; | |
277 | } | |
278 | ||
279 | /* Open output element */ | |
280 | ret = mi_lttng_writer_open_element(writer, | |
281 | mi_lttng_element_command_output); | |
282 | if (ret) { | |
283 | ret = CMD_ERROR; | |
284 | goto end; | |
285 | } | |
286 | } | |
287 | ||
288 | command_ret = disable_channels(session_name); | |
289 | if (command_ret) { | |
290 | success = 0; | |
291 | } | |
292 | ||
293 | /* Mi closing */ | |
294 | if (lttng_opt_mi) { | |
295 | /* Close output element */ | |
296 | ret = mi_lttng_writer_close_element(writer); | |
297 | if (ret) { | |
298 | ret = CMD_ERROR; | |
299 | goto end; | |
300 | } | |
301 | ||
302 | /* Success ? */ | |
303 | ret = mi_lttng_writer_write_element_bool(writer, | |
304 | mi_lttng_element_success, success); | |
305 | if (ret) { | |
306 | ret = CMD_ERROR; | |
307 | goto end; | |
308 | } | |
309 | ||
310 | /* Command element close */ | |
311 | ret = mi_lttng_writer_command_close(writer); | |
312 | if (ret) { | |
313 | ret = CMD_ERROR; | |
314 | goto end; | |
315 | } | |
316 | } | |
26cc6b4e DG |
317 | |
318 | end: | |
50534d6f JRJ |
319 | /* Mi clean-up */ |
320 | if (writer && mi_lttng_writer_destroy(writer)) { | |
321 | /* Preserve original error code */ | |
322 | ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL; | |
323 | } | |
324 | ||
5853fd43 DG |
325 | if (!opt_session_name && session_name) { |
326 | free(session_name); | |
327 | } | |
50534d6f JRJ |
328 | |
329 | /* Overwrite ret if an error occurred in disable_channels */ | |
330 | ret = command_ret ? command_ret : ret; | |
331 | ||
ca1c3607 | 332 | poptFreeContext(pc); |
26cc6b4e DG |
333 | return ret; |
334 | } |