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ab33e65c | 1 | /* Copyright (C) 2009 Pierre-Marc Fournier, Philippe Proulx-Barrette |
8b26d56b | 2 | * Copyright (C) 2011 Ericsson AB |
ab33e65c PP |
3 | * |
4 | * This library is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
8 | * | |
9 | * This library is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU Lesser General Public | |
15 | * License along with this library; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
ef290fca | 19 | #define _GNU_SOURCE |
ab33e65c PP |
20 | #include <stdio.h> |
21 | #include <unistd.h> | |
22 | #include <getopt.h> | |
23 | #include <stdlib.h> | |
24 | #include <fcntl.h> | |
25 | #include <string.h> | |
26 | #include <dirent.h> | |
ab33e65c PP |
27 | |
28 | #include "ustcomm.h" | |
2298f329 | 29 | #include "ust/ustctl.h" |
2a79ceeb | 30 | #include "usterr.h" |
ab33e65c | 31 | |
8b26d56b | 32 | static int do_cmd(int sock, |
72098143 NC |
33 | const struct ustcomm_header *req_header, |
34 | const char *req_data, | |
35 | struct ustcomm_header *res_header, | |
36 | char **res_data) | |
37 | { | |
8b26d56b | 38 | int result, saved_errno = 0; |
72098143 NC |
39 | char *recv_buf; |
40 | ||
72098143 NC |
41 | recv_buf = zmalloc(USTCOMM_BUFFER_SIZE); |
42 | if (!recv_buf) { | |
43 | saved_errno = ENOMEM; | |
8b26d56b | 44 | goto out; |
72098143 NC |
45 | } |
46 | ||
8b26d56b | 47 | result = ustcomm_req(sock, req_header, req_data, res_header, recv_buf); |
72098143 NC |
48 | if (result > 0) { |
49 | saved_errno = -res_header->result; | |
50 | if (res_header->size == 0 || saved_errno > 0) { | |
51 | free(recv_buf); | |
52 | } else { | |
53 | if (res_data) { | |
54 | *res_data = recv_buf; | |
55 | } else { | |
56 | free(recv_buf); | |
57 | } | |
58 | } | |
59 | } else { | |
60 | ERR("ustcomm req failed"); | |
61 | if (result == 0) { | |
62 | saved_errno = ENOTCONN; | |
63 | } else { | |
64 | saved_errno = -result; | |
65 | } | |
66 | free(recv_buf); | |
67 | } | |
68 | ||
8b26d56b | 69 | out: |
72098143 | 70 | errno = saved_errno; |
72098143 NC |
71 | if (errno) { |
72 | return -1; | |
73 | } | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
8b26d56b NC |
78 | int ustctl_connect_pid(pid_t pid) |
79 | { | |
80 | int sock; | |
81 | ||
82 | if (ustcomm_connect_app(pid, &sock)) { | |
83 | ERR("could not connect to PID %u", (unsigned int) pid); | |
84 | errno = ENOTCONN; | |
85 | return -1; | |
86 | } | |
87 | ||
88 | return sock; | |
89 | } | |
90 | ||
2298f329 | 91 | pid_t *ustctl_get_online_pids(void) |
772030fe | 92 | { |
08230db7 PMF |
93 | struct dirent *dirent; |
94 | DIR *dir; | |
ef290fca | 95 | unsigned int ret_size = 1 * sizeof(pid_t), i = 0; |
ab33e65c PP |
96 | |
97 | dir = opendir(SOCK_DIR); | |
98 | if (!dir) { | |
99 | return NULL; | |
100 | } | |
101 | ||
08230db7 | 102 | pid_t *ret = (pid_t *) malloc(ret_size); |
ab33e65c | 103 | |
772030fe | 104 | while ((dirent = readdir(dir))) { |
ab33e65c | 105 | if (!strcmp(dirent->d_name, ".") || |
72098143 | 106 | !strcmp(dirent->d_name, "..")) { |
ab33e65c PP |
107 | |
108 | continue; | |
109 | } | |
110 | ||
111 | if (dirent->d_type != DT_DIR && | |
9dc7b7ff | 112 | !!strcmp(dirent->d_name, "ust-consumer")) { |
ab33e65c | 113 | |
08230db7 | 114 | sscanf(dirent->d_name, "%u", (unsigned int *) &ret[i]); |
4723ca09 NC |
115 | /* FIXME: Here we previously called pid_is_online, which |
116 | * always returned 1, now I replaced it with just 1. | |
117 | * We need to figure out an intelligent way of solving | |
118 | * this, maybe connect-disconnect. | |
119 | */ | |
120 | if (1) { | |
ab33e65c | 121 | ret_size += sizeof(pid_t); |
08230db7 | 122 | ret = (pid_t *) realloc(ret, ret_size); |
ab33e65c PP |
123 | ++i; |
124 | } | |
125 | } | |
126 | } | |
127 | ||
77957c95 | 128 | ret[i] = 0; /* Array end */ |
ab33e65c | 129 | |
08230db7 | 130 | if (ret[0] == 0) { |
72098143 | 131 | /* No PID at all */ |
ab33e65c PP |
132 | free(ret); |
133 | return NULL; | |
134 | } | |
135 | ||
136 | closedir(dir); | |
137 | return ret; | |
138 | } | |
139 | ||
140 | /** | |
2298f329 | 141 | * Sets marker state (USTCTL_MS_ON or USTCTL_MS_OFF). |
ab33e65c PP |
142 | * |
143 | * @param mn Marker name | |
144 | * @param state Marker's new state | |
145 | * @param pid Traced process ID | |
2298f329 | 146 | * @return 0 if successful, or errors {USTCTL_ERR_GEN, USTCTL_ERR_ARG} |
ab33e65c | 147 | */ |
8b26d56b NC |
148 | int ustctl_set_marker_state(int sock, const char *trace, const char *channel, |
149 | const char *marker, int state) | |
ef290fca | 150 | { |
72098143 NC |
151 | struct ustcomm_header req_header, res_header; |
152 | struct ustcomm_marker_info marker_inf; | |
ef290fca PMF |
153 | int result; |
154 | ||
72098143 NC |
155 | result = ustcomm_pack_marker_info(&req_header, |
156 | &marker_inf, | |
d89b8191 | 157 | trace, |
72098143 NC |
158 | channel, |
159 | marker); | |
160 | if (result < 0) { | |
161 | errno = -result; | |
162 | return -1; | |
08b8805e | 163 | } |
ab33e65c | 164 | |
72098143 | 165 | req_header.command = state ? ENABLE_MARKER : DISABLE_MARKER; |
ab33e65c | 166 | |
8b26d56b | 167 | return do_cmd(sock, &req_header, (char *)&marker_inf, |
72098143 | 168 | &res_header, NULL); |
ab33e65c PP |
169 | } |
170 | ||
763f41e5 DS |
171 | /** |
172 | * Set subbuffer size. | |
173 | * | |
174 | * @param channel_size Channel name and size | |
175 | * @param pid Traced process ID | |
176 | * @return 0 if successful, or error | |
177 | */ | |
8b26d56b NC |
178 | int ustctl_set_subbuf_size(int sock, const char *trace, const char *channel, |
179 | unsigned int subbuf_size) | |
763f41e5 | 180 | { |
72098143 NC |
181 | struct ustcomm_header req_header, res_header; |
182 | struct ustcomm_channel_info ch_inf; | |
763f41e5 DS |
183 | int result; |
184 | ||
72098143 NC |
185 | result = ustcomm_pack_channel_info(&req_header, |
186 | &ch_inf, | |
d89b8191 | 187 | trace, |
72098143 NC |
188 | channel); |
189 | if (result < 0) { | |
190 | errno = -result; | |
08b8805e DG |
191 | return -1; |
192 | } | |
763f41e5 | 193 | |
72098143 NC |
194 | req_header.command = SET_SUBBUF_SIZE; |
195 | ch_inf.subbuf_size = subbuf_size; | |
763f41e5 | 196 | |
8b26d56b | 197 | return do_cmd(sock, &req_header, (char *)&ch_inf, |
72098143 | 198 | &res_header, NULL); |
763f41e5 DS |
199 | } |
200 | ||
201 | /** | |
202 | * Set subbuffer num. | |
203 | * | |
204 | * @param channel_num Channel name and num | |
205 | * @param pid Traced process ID | |
206 | * @return 0 if successful, or error | |
207 | */ | |
8b26d56b NC |
208 | int ustctl_set_subbuf_num(int sock, const char *trace, const char *channel, |
209 | unsigned int num) | |
763f41e5 | 210 | { |
72098143 NC |
211 | struct ustcomm_header req_header, res_header; |
212 | struct ustcomm_channel_info ch_inf; | |
763f41e5 DS |
213 | int result; |
214 | ||
72098143 NC |
215 | result = ustcomm_pack_channel_info(&req_header, |
216 | &ch_inf, | |
d89b8191 | 217 | trace, |
72098143 NC |
218 | channel); |
219 | if (result < 0) { | |
220 | errno = -result; | |
08b8805e DG |
221 | return -1; |
222 | } | |
763f41e5 | 223 | |
72098143 NC |
224 | req_header.command = SET_SUBBUF_NUM; |
225 | ch_inf.subbuf_num = num; | |
226 | ||
8b26d56b | 227 | return do_cmd(sock, &req_header, (char *)&ch_inf, |
72098143 | 228 | &res_header, NULL); |
763f41e5 | 229 | |
763f41e5 DS |
230 | } |
231 | ||
8b26d56b NC |
232 | |
233 | static int ustctl_get_subbuf_num_size(int sock, const char *trace, const char *channel, | |
234 | int *num, int *size) | |
e77b8e8e | 235 | { |
72098143 NC |
236 | struct ustcomm_header req_header, res_header; |
237 | struct ustcomm_channel_info ch_inf, *ch_inf_res; | |
e77b8e8e DS |
238 | int result; |
239 | ||
72098143 NC |
240 | |
241 | result = ustcomm_pack_channel_info(&req_header, | |
242 | &ch_inf, | |
d89b8191 | 243 | trace, |
72098143 NC |
244 | channel); |
245 | if (result < 0) { | |
246 | errno = -result; | |
08b8805e DG |
247 | return -1; |
248 | } | |
e77b8e8e | 249 | |
72098143 NC |
250 | req_header.command = GET_SUBBUF_NUM_SIZE; |
251 | ||
8b26d56b | 252 | result = do_cmd(sock, &req_header, (char *)&ch_inf, |
72098143 NC |
253 | &res_header, (char **)&ch_inf_res); |
254 | if (result < 0) { | |
e77b8e8e DS |
255 | return -1; |
256 | } | |
257 | ||
72098143 NC |
258 | *num = ch_inf_res->subbuf_num; |
259 | *size = ch_inf_res->subbuf_size; | |
260 | ||
261 | free(ch_inf_res); | |
262 | ||
263 | return 0; | |
e77b8e8e DS |
264 | } |
265 | ||
266 | /** | |
267 | * Get subbuffer num. | |
268 | * | |
269 | * @param channel Channel name | |
270 | * @param pid Traced process ID | |
271 | * @return subbuf cnf if successful, or error | |
272 | */ | |
8b26d56b | 273 | int ustctl_get_subbuf_num(int sock, const char *trace, const char *channel) |
e77b8e8e | 274 | { |
72098143 | 275 | int num, size, result; |
e77b8e8e | 276 | |
8b26d56b | 277 | result = ustctl_get_subbuf_num_size(sock, trace, channel, |
72098143 NC |
278 | &num, &size); |
279 | if (result < 0) { | |
280 | errno = -result; | |
08b8805e DG |
281 | return -1; |
282 | } | |
e77b8e8e | 283 | |
72098143 NC |
284 | return num; |
285 | } | |
286 | ||
287 | /** | |
288 | * Get subbuffer size. | |
289 | * | |
290 | * @param channel Channel name | |
291 | * @param pid Traced process ID | |
292 | * @return subbuf size if successful, or error | |
293 | */ | |
8b26d56b | 294 | int ustctl_get_subbuf_size(int sock, const char *trace, const char *channel) |
72098143 NC |
295 | { |
296 | int num, size, result; | |
297 | ||
8b26d56b | 298 | result = ustctl_get_subbuf_num_size(sock, trace, channel, |
72098143 NC |
299 | &num, &size); |
300 | if (result < 0) { | |
301 | errno = -result; | |
e77b8e8e DS |
302 | return -1; |
303 | } | |
304 | ||
72098143 | 305 | return size; |
e77b8e8e | 306 | } |
763f41e5 | 307 | |
8b26d56b | 308 | static int do_trace_cmd(int sock, const char *trace, int command) |
d89b8191 NC |
309 | { |
310 | struct ustcomm_header req_header, res_header; | |
28c1bb40 | 311 | struct ustcomm_single_field trace_inf; |
d89b8191 NC |
312 | int result; |
313 | ||
28c1bb40 NC |
314 | result = ustcomm_pack_single_field(&req_header, |
315 | &trace_inf, | |
316 | trace); | |
d89b8191 NC |
317 | if (result < 0) { |
318 | errno = -result; | |
319 | return -1; | |
320 | } | |
321 | ||
322 | req_header.command = command; | |
323 | ||
8b26d56b | 324 | return do_cmd(sock, &req_header, (char *)&trace_inf, &res_header, NULL); |
d89b8191 NC |
325 | } |
326 | ||
ab33e65c PP |
327 | /** |
328 | * Destroys an UST trace according to a PID. | |
329 | * | |
330 | * @param pid Traced process ID | |
2298f329 | 331 | * @return 0 if successful, or error USTCTL_ERR_GEN |
ab33e65c | 332 | */ |
8b26d56b | 333 | int ustctl_destroy_trace(int sock, const char *trace) |
772030fe | 334 | { |
8b26d56b | 335 | return do_trace_cmd(sock, trace, DESTROY_TRACE); |
ab33e65c PP |
336 | } |
337 | ||
338 | /** | |
339 | * Starts an UST trace (and setups it) according to a PID. | |
340 | * | |
341 | * @param pid Traced process ID | |
2298f329 | 342 | * @return 0 if successful, or error USTCTL_ERR_GEN |
ab33e65c | 343 | */ |
8b26d56b | 344 | int ustctl_setup_and_start(int sock, const char *trace) |
772030fe | 345 | { |
8b26d56b | 346 | return do_trace_cmd(sock, trace, START); |
ab33e65c PP |
347 | } |
348 | ||
62ec620f PMF |
349 | /** |
350 | * Creates an UST trace according to a PID. | |
351 | * | |
352 | * @param pid Traced process ID | |
2298f329 | 353 | * @return 0 if successful, or error USTCTL_ERR_GEN |
62ec620f | 354 | */ |
8b26d56b | 355 | int ustctl_create_trace(int sock, const char *trace) |
62ec620f | 356 | { |
8b26d56b | 357 | return do_trace_cmd(sock, trace, CREATE_TRACE); |
62ec620f PMF |
358 | } |
359 | ||
ab33e65c PP |
360 | /** |
361 | * Starts an UST trace according to a PID. | |
362 | * | |
363 | * @param pid Traced process ID | |
2298f329 | 364 | * @return 0 if successful, or error USTCTL_ERR_GEN |
ab33e65c | 365 | */ |
8b26d56b | 366 | int ustctl_start_trace(int sock, const char *trace) |
772030fe | 367 | { |
8b26d56b | 368 | return do_trace_cmd(sock, trace, START_TRACE); |
ab33e65c PP |
369 | } |
370 | ||
763f41e5 DS |
371 | /** |
372 | * Alloc an UST trace according to a PID. | |
373 | * | |
374 | * @param pid Traced process ID | |
2298f329 | 375 | * @return 0 if successful, or error USTCTL_ERR_GEN |
763f41e5 | 376 | */ |
8b26d56b | 377 | int ustctl_alloc_trace(int sock, const char *trace) |
763f41e5 | 378 | { |
8b26d56b | 379 | return do_trace_cmd(sock, trace, ALLOC_TRACE); |
763f41e5 DS |
380 | } |
381 | ||
ab33e65c PP |
382 | /** |
383 | * Stops an UST trace according to a PID. | |
384 | * | |
385 | * @param pid Traced process ID | |
2298f329 | 386 | * @return 0 if successful, or error USTCTL_ERR_GEN |
ab33e65c | 387 | */ |
8b26d56b | 388 | int ustctl_stop_trace(int sock, const char *trace) |
772030fe | 389 | { |
8b26d56b | 390 | return do_trace_cmd(sock, trace, STOP_TRACE); |
ab33e65c PP |
391 | } |
392 | ||
393 | /** | |
394 | * Counts newlines ('\n') in a string. | |
395 | * | |
396 | * @param str String to search in | |
397 | * @return Total newlines count | |
398 | */ | |
2298f329 | 399 | unsigned int ustctl_count_nl(const char *str) |
772030fe | 400 | { |
ab33e65c PP |
401 | unsigned int i = 0, tot = 0; |
402 | ||
403 | while (str[i] != '\0') { | |
404 | if (str[i] == '\n') { | |
405 | ++tot; | |
406 | } | |
407 | ++i; | |
408 | } | |
409 | ||
410 | return tot; | |
411 | } | |
412 | ||
413 | /** | |
414 | * Frees a CMSF array. | |
415 | * | |
416 | * @param cmsf CMSF array to free | |
2298f329 | 417 | * @return 0 if successful, or error USTCTL_ERR_ARG |
ab33e65c | 418 | */ |
2298f329 | 419 | int ustctl_free_cmsf(struct marker_status *cmsf) |
772030fe | 420 | { |
ab33e65c | 421 | if (cmsf == NULL) { |
2298f329 | 422 | return USTCTL_ERR_ARG; |
ab33e65c PP |
423 | } |
424 | ||
425 | unsigned int i = 0; | |
426 | while (cmsf[i].channel != NULL) { | |
427 | free(cmsf[i].channel); | |
428 | free(cmsf[i].marker); | |
429 | free(cmsf[i].fs); | |
430 | ++i; | |
431 | } | |
432 | free(cmsf); | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
437 | /** | |
438 | * Gets channel/marker/state/format string for a given PID. | |
439 | * | |
440 | * @param cmsf Pointer to CMSF array to be filled (callee allocates, caller | |
2298f329 | 441 | * frees with `ustctl_free_cmsf') |
ab33e65c | 442 | * @param pid Targeted PID |
2a79ceeb | 443 | * @return 0 if successful, or -1 on error |
ab33e65c | 444 | */ |
8b26d56b | 445 | int ustctl_get_cmsf(int sock, struct marker_status **cmsf) |
772030fe | 446 | { |
72098143 | 447 | struct ustcomm_header req_header, res_header; |
08230db7 | 448 | char *big_str = NULL; |
8b26d56b | 449 | int result; |
08230db7 | 450 | struct marker_status *tmp_cmsf = NULL; |
ef290fca PMF |
451 | unsigned int i = 0, cmsf_ind = 0; |
452 | ||
ab33e65c | 453 | if (cmsf == NULL) { |
2a79ceeb | 454 | return -1; |
ab33e65c | 455 | } |
72098143 | 456 | |
72098143 NC |
457 | req_header.command = LIST_MARKERS; |
458 | req_header.size = 0; | |
459 | ||
8b26d56b | 460 | result = ustcomm_send(sock, &req_header, NULL); |
72098143 | 461 | if (result <= 0) { |
8b26d56b | 462 | PERROR("error while requesting markers list"); |
2a79ceeb | 463 | return -1; |
ab33e65c PP |
464 | } |
465 | ||
8b26d56b | 466 | result = ustcomm_recv_alloc(sock, &res_header, &big_str); |
72098143 NC |
467 | if (result <= 0) { |
468 | ERR("error while receiving markers list"); | |
469 | return -1; | |
470 | } | |
471 | ||
72098143 | 472 | tmp_cmsf = (struct marker_status *) zmalloc(sizeof(struct marker_status) * |
2298f329 | 473 | (ustctl_count_nl(big_str) + 1)); |
ab33e65c | 474 | if (tmp_cmsf == NULL) { |
dc46f6e6 | 475 | ERR("Failed to allocate CMSF array"); |
2a79ceeb | 476 | return -1; |
ab33e65c PP |
477 | } |
478 | ||
77957c95 | 479 | /* Parse received reply string (format: "[chan]/[mark] [st] [fs]"): */ |
ab33e65c | 480 | while (big_str[i] != '\0') { |
ab33e65c | 481 | char state; |
ef290fca | 482 | |
264f6231 | 483 | sscanf(big_str + i, "marker: %a[^/]/%a[^ ] %c %a[^\n]", |
72098143 NC |
484 | &tmp_cmsf[cmsf_ind].channel, |
485 | &tmp_cmsf[cmsf_ind].marker, | |
486 | &state, | |
487 | &tmp_cmsf[cmsf_ind].fs); | |
2298f329 NC |
488 | tmp_cmsf[cmsf_ind].state = (state == USTCTL_MS_CHR_ON ? |
489 | USTCTL_MS_ON : USTCTL_MS_OFF); /* Marker state */ | |
ab33e65c PP |
490 | |
491 | while (big_str[i] != '\n') { | |
77957c95 | 492 | ++i; /* Go to next '\n' */ |
ab33e65c | 493 | } |
77957c95 | 494 | ++i; /* Skip current pointed '\n' */ |
ab33e65c PP |
495 | ++cmsf_ind; |
496 | } | |
497 | tmp_cmsf[cmsf_ind].channel = NULL; | |
498 | tmp_cmsf[cmsf_ind].marker = NULL; | |
499 | tmp_cmsf[cmsf_ind].fs = NULL; | |
500 | ||
501 | *cmsf = tmp_cmsf; | |
502 | ||
503 | free(big_str); | |
504 | return 0; | |
505 | } | |
506 | ||
a3adfb05 NC |
507 | /** |
508 | * Frees a TES array. | |
509 | * | |
510 | * @param tes TES array to free | |
2298f329 | 511 | * @return 0 if successful, or error USTCTL_ERR_ARG |
a3adfb05 | 512 | */ |
2298f329 | 513 | int ustctl_free_tes(struct trace_event_status *tes) |
a3adfb05 NC |
514 | { |
515 | if (tes == NULL) { | |
2298f329 | 516 | return USTCTL_ERR_ARG; |
a3adfb05 NC |
517 | } |
518 | ||
519 | unsigned int i = 0; | |
520 | while (tes[i].name != NULL) { | |
521 | free(tes[i].name); | |
522 | ++i; | |
523 | } | |
524 | free(tes); | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
529 | /** | |
530 | * Gets trace_events string for a given PID. | |
531 | * | |
532 | * @param tes Pointer to TES array to be filled (callee allocates, caller | |
2298f329 | 533 | * frees with `ustctl_free_tes') |
a3adfb05 NC |
534 | * @param pid Targeted PID |
535 | * @return 0 if successful, or -1 on error | |
536 | */ | |
8b26d56b | 537 | int ustctl_get_tes(int sock, struct trace_event_status **tes) |
a3adfb05 | 538 | { |
72098143 | 539 | struct ustcomm_header req_header, res_header; |
a3adfb05 | 540 | char *big_str = NULL; |
8b26d56b | 541 | int result; |
a3adfb05 NC |
542 | struct trace_event_status *tmp_tes = NULL; |
543 | unsigned int i = 0, tes_ind = 0; | |
544 | ||
545 | if (tes == NULL) { | |
546 | return -1; | |
547 | } | |
548 | ||
72098143 NC |
549 | req_header.command = LIST_TRACE_EVENTS; |
550 | req_header.size = 0; | |
551 | ||
8b26d56b | 552 | result = ustcomm_send(sock, &req_header, NULL); |
72098143 NC |
553 | if (result != 1) { |
554 | ERR("error while requesting trace_event list"); | |
555 | return -1; | |
556 | } | |
557 | ||
8b26d56b | 558 | result = ustcomm_recv_alloc(sock, &res_header, &big_str); |
a3adfb05 | 559 | if (result != 1) { |
72098143 | 560 | ERR("error while receiving markers list"); |
a3adfb05 NC |
561 | return -1; |
562 | } | |
563 | ||
564 | tmp_tes = (struct trace_event_status *) | |
565 | zmalloc(sizeof(struct trace_event_status) * | |
2298f329 | 566 | (ustctl_count_nl(big_str) + 1)); |
a3adfb05 NC |
567 | if (tmp_tes == NULL) { |
568 | ERR("Failed to allocate TES array"); | |
569 | return -1; | |
570 | } | |
571 | ||
572 | /* Parse received reply string (format: "[name]"): */ | |
573 | while (big_str[i] != '\0') { | |
a3adfb05 | 574 | sscanf(big_str + i, "trace_event: %a[^\n]", |
72098143 | 575 | &tmp_tes[tes_ind].name); |
a3adfb05 NC |
576 | while (big_str[i] != '\n') { |
577 | ++i; /* Go to next '\n' */ | |
578 | } | |
579 | ++i; /* Skip current pointed '\n' */ | |
580 | ++tes_ind; | |
581 | } | |
582 | tmp_tes[tes_ind].name = NULL; | |
583 | ||
584 | *tes = tmp_tes; | |
585 | ||
586 | free(big_str); | |
587 | return 0; | |
588 | } | |
589 | ||
b2fb2f91 | 590 | /** |
8b26d56b | 591 | * Set sock path |
b2fb2f91 | 592 | * |
8b26d56b | 593 | * @param sock_path Sock path |
b2fb2f91 AH |
594 | * @param pid Traced process ID |
595 | * @return 0 if successful, or error | |
596 | */ | |
8b26d56b | 597 | int ustctl_set_sock_path(int sock, const char *sock_path) |
b2fb2f91 | 598 | { |
28c1bb40 | 599 | int result; |
72098143 | 600 | struct ustcomm_header req_header, res_header; |
28c1bb40 | 601 | struct ustcomm_single_field sock_path_msg; |
72098143 | 602 | |
28c1bb40 NC |
603 | result = ustcomm_pack_single_field(&req_header, |
604 | &sock_path_msg, | |
605 | sock_path); | |
606 | if (result < 0) { | |
607 | errno = -result; | |
08b8805e DG |
608 | return -1; |
609 | } | |
b2fb2f91 | 610 | |
72098143 | 611 | req_header.command = SET_SOCK_PATH; |
b2fb2f91 | 612 | |
8b26d56b | 613 | return do_cmd(sock, &req_header, (char *)&sock_path_msg, |
72098143 | 614 | &res_header, NULL); |
b2fb2f91 AH |
615 | } |
616 | ||
617 | /** | |
8b26d56b | 618 | * Get sock path |
b2fb2f91 | 619 | * |
8b26d56b | 620 | * @param sock_path Pointer to where the sock path will be returned |
b2fb2f91 AH |
621 | * @param pid Traced process ID |
622 | * @return 0 if successful, or error | |
623 | */ | |
8b26d56b | 624 | int ustctl_get_sock_path(int sock, char **sock_path) |
b2fb2f91 | 625 | { |
b2fb2f91 | 626 | int result; |
72098143 | 627 | struct ustcomm_header req_header, res_header; |
28c1bb40 | 628 | struct ustcomm_single_field *sock_path_msg; |
72098143 NC |
629 | |
630 | req_header.command = GET_SOCK_PATH; | |
631 | req_header.size = 0; | |
b2fb2f91 | 632 | |
8b26d56b | 633 | result = do_cmd(sock, &req_header, NULL, &res_header, |
72098143 NC |
634 | (char **)&sock_path_msg); |
635 | if (result < 0) { | |
636 | return -1; | |
08b8805e | 637 | } |
b2fb2f91 | 638 | |
28c1bb40 | 639 | result = ustcomm_unpack_single_field(sock_path_msg); |
72098143 NC |
640 | if (result < 0) { |
641 | return result; | |
b2fb2f91 AH |
642 | } |
643 | ||
28c1bb40 | 644 | *sock_path = strdup(sock_path_msg->field); |
b2fb2f91 | 645 | |
72098143 | 646 | free(sock_path_msg); |
b9318b35 AH |
647 | |
648 | return 0; | |
649 | } | |
650 | ||
8b26d56b | 651 | int ustctl_force_switch(int sock, const char *trace) |
772030fe | 652 | { |
72098143 | 653 | struct ustcomm_header req_header, res_header; |
ab33e65c | 654 | |
72098143 NC |
655 | req_header.command = FORCE_SUBBUF_SWITCH; |
656 | req_header.size = 0; | |
ab33e65c | 657 | |
8b26d56b | 658 | return do_cmd(sock, &req_header, NULL, &res_header, NULL); |
ab33e65c | 659 | } |