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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <string.h> | |
22 | #include <sys/types.h> | |
23 | #include <sys/stat.h> | |
24 | #include <fcntl.h> | |
25 | #include <unistd.h> | |
26 | #ifdef _WIN32 | |
27 | #include <windows.h> | |
28 | #else | |
29 | #include <glob.h> | |
30 | #include <termios.h> | |
31 | #endif | |
32 | #include <stdlib.h> | |
33 | #include <errno.h> | |
34 | #include <glib.h> | |
35 | #include "libsigrok.h" | |
36 | #include "libsigrok-internal.h" | |
37 | ||
38 | /* Message logging helpers with driver-specific prefix string. */ | |
39 | #define DRIVER_LOG_DOMAIN "serial: " | |
40 | #define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args) | |
41 | #define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args) | |
42 | #define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args) | |
43 | #define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args) | |
44 | #define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args) | |
45 | #define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args) | |
46 | ||
47 | // FIXME: Must be moved, or rather passed as function argument. | |
48 | #ifdef _WIN32 | |
49 | static HANDLE hdl; | |
50 | #endif | |
51 | ||
52 | static const char *serial_port_glob[] = { | |
53 | /* Linux */ | |
54 | "/dev/ttyS*", | |
55 | "/dev/ttyUSB*", | |
56 | "/dev/ttyACM*", | |
57 | /* MacOS X */ | |
58 | "/dev/ttys*", | |
59 | "/dev/tty.USB-*", | |
60 | "/dev/tty.Modem-*", | |
61 | NULL, | |
62 | }; | |
63 | ||
64 | SR_PRIV GSList *list_serial_ports(void) | |
65 | { | |
66 | GSList *ports; | |
67 | ||
68 | sr_dbg("Getting list of serial ports on the system."); | |
69 | ||
70 | #ifdef _WIN32 | |
71 | /* TODO */ | |
72 | ports = NULL; | |
73 | ports = g_slist_append(ports, g_strdup("COM1")); | |
74 | #else | |
75 | glob_t g; | |
76 | unsigned int i, j; | |
77 | ||
78 | ports = NULL; | |
79 | for (i = 0; serial_port_glob[i]; i++) { | |
80 | if (glob(serial_port_glob[i], 0, NULL, &g)) | |
81 | continue; | |
82 | for (j = 0; j < g.gl_pathc; j++) { | |
83 | ports = g_slist_append(ports, g_strdup(g.gl_pathv[j])); | |
84 | sr_dbg("Found serial port '%s'.", g.gl_pathv[j]); | |
85 | } | |
86 | globfree(&g); | |
87 | } | |
88 | #endif | |
89 | ||
90 | return ports; | |
91 | } | |
92 | ||
93 | /** | |
94 | * Open the specified serial port. | |
95 | * | |
96 | * @param pathname OS-specific serial port specification. Examples: | |
97 | * "/dev/ttyUSB0", "/dev/ttyACM1", "/dev/tty.Modem-0", "COM1". | |
98 | * @param flags Flags to use when opening the serial port. | |
99 | * | |
100 | * @return 0 upon success, -1 upon failure. | |
101 | */ | |
102 | SR_PRIV int serial_open(const char *pathname, int flags) | |
103 | { | |
104 | /* TODO: Abstract 'flags', currently they're OS-specific! */ | |
105 | ||
106 | sr_dbg("Opening serial port '%s' (flags = %d).", pathname, flags); | |
107 | ||
108 | #ifdef _WIN32 | |
109 | pathname = "COM1"; /* FIXME: Don't hardcode COM1. */ | |
110 | ||
111 | hdl = CreateFile(pathname, GENERIC_READ | GENERIC_WRITE, 0, 0, | |
112 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
113 | if (hdl == INVALID_HANDLE_VALUE) { | |
114 | sr_err("Error opening serial port '%s'.", pathname); | |
115 | return -1; | |
116 | } | |
117 | return 0; | |
118 | #else | |
119 | int fd; | |
120 | ||
121 | if ((fd = open(pathname, flags)) < 0) { | |
122 | /* | |
123 | * Should be sr_err(), but since some drivers try to open all | |
124 | * ports on a system and see if they succeed, this would | |
125 | * yield ugly output for e.g. "sigrok-cli -D". | |
126 | */ | |
127 | sr_dbg("Error opening serial port '%s': %s.", pathname, | |
128 | strerror(errno)); | |
129 | } | |
130 | ||
131 | return fd; | |
132 | #endif | |
133 | } | |
134 | ||
135 | /** | |
136 | * Close the specified serial port. | |
137 | * | |
138 | * @param fd File descriptor of the serial port. | |
139 | * | |
140 | * @return 0 upon success, -1 upon failure. | |
141 | */ | |
142 | SR_PRIV int serial_close(int fd) | |
143 | { | |
144 | sr_dbg("FD %d: Closing serial port.", fd); | |
145 | ||
146 | #ifdef _WIN32 | |
147 | /* Returns non-zero upon success, 0 upon failure. */ | |
148 | return (CloseHandle(hdl) == 0) ? -1 : 0; | |
149 | #else | |
150 | int ret; | |
151 | ||
152 | /* Returns 0 upon success, -1 upon failure. */ | |
153 | if ((ret = close(fd)) < 0) { | |
154 | sr_dbg("FD %d: Error closing serial port: %s.", | |
155 | fd, strerror(errno)); | |
156 | } | |
157 | ||
158 | return ret; | |
159 | #endif | |
160 | } | |
161 | ||
162 | /** | |
163 | * Flush serial port buffers (if any). | |
164 | * | |
165 | * @param fd File descriptor of the serial port. | |
166 | * | |
167 | * @return 0 upon success, -1 upon failure. | |
168 | */ | |
169 | SR_PRIV int serial_flush(int fd) | |
170 | { | |
171 | sr_dbg("FD %d: Flushing serial port.", fd); | |
172 | ||
173 | #ifdef _WIN32 | |
174 | /* Returns non-zero upon success, 0 upon failure. */ | |
175 | return (PurgeComm(hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0) ? -1 : 0; | |
176 | #else | |
177 | int ret; | |
178 | ||
179 | /* Returns 0 upon success, -1 upon failure. */ | |
180 | if ((ret = tcflush(fd, TCIOFLUSH)) < 0) | |
181 | sr_err("Error flushing serial port: %s.", strerror(errno)); | |
182 | ||
183 | return ret; | |
184 | #endif | |
185 | } | |
186 | ||
187 | /** | |
188 | * Write a number of bytes to the specified serial port. | |
189 | * | |
190 | * @param fd File descriptor of the serial port. | |
191 | * @param buf Buffer containing the bytes to write. | |
192 | * @param count Number of bytes to write. | |
193 | * | |
194 | * @return The number of bytes written, or -1 upon failure. | |
195 | */ | |
196 | SR_PRIV int serial_write(int fd, const void *buf, size_t count) | |
197 | { | |
198 | sr_spew("FD %d: Writing %d bytes.", fd, count); | |
199 | ||
200 | #ifdef _WIN32 | |
201 | DWORD tmp = 0; | |
202 | ||
203 | /* FIXME */ | |
204 | /* Returns non-zero upon success, 0 upon failure. */ | |
205 | WriteFile(hdl, buf, count, &tmp, NULL); | |
206 | #else | |
207 | ssize_t ret; | |
208 | ||
209 | /* Returns the number of bytes written, or -1 upon failure. */ | |
210 | ret = write(fd, buf, count); | |
211 | if (ret < 0) | |
212 | sr_err("FD %d: Write error: %s.", fd, strerror(errno)); | |
213 | else if ((size_t)ret != count) | |
214 | sr_spew("FD %d: Only wrote %d/%d bytes.", fd, ret, count); | |
215 | ||
216 | return ret; | |
217 | #endif | |
218 | } | |
219 | ||
220 | /** | |
221 | * Read a number of bytes from the specified serial port. | |
222 | * | |
223 | * @param fd File descriptor of the serial port. | |
224 | * @param buf Buffer where to store the bytes that are read. | |
225 | * @param count The number of bytes to read. | |
226 | * | |
227 | * @return The number of bytes read, or -1 upon failure. | |
228 | */ | |
229 | SR_PRIV int serial_read(int fd, void *buf, size_t count) | |
230 | { | |
231 | sr_spew("FD %d: Reading %d bytes.", fd, count); | |
232 | ||
233 | #ifdef _WIN32 | |
234 | DWORD tmp = 0; | |
235 | ||
236 | /* FIXME */ | |
237 | /* Returns non-zero upon success, 0 upon failure. */ | |
238 | return ReadFile(hdl, buf, count, &tmp, NULL); | |
239 | #else | |
240 | ssize_t ret; | |
241 | ||
242 | /* Returns the number of bytes read, or -1 upon failure. */ | |
243 | ret = read(fd, buf, count); | |
244 | if (ret < 0) { | |
245 | /* | |
246 | * Should be sr_err(), but that would yield lots of | |
247 | * "Resource temporarily unavailable" messages. | |
248 | */ | |
249 | sr_spew("FD %d: Read error: %s.", fd, strerror(errno)); | |
250 | } else if ((size_t)ret != count) { | |
251 | sr_spew("FD %d: Only read %d/%d bytes.", fd, ret, count); | |
252 | } | |
253 | ||
254 | return ret; | |
255 | #endif | |
256 | } | |
257 | ||
258 | /** | |
259 | * Create a backup of the current parameters of the specified serial port. | |
260 | * | |
261 | * @param fd File descriptor of the serial port. | |
262 | * | |
263 | * @return Pointer to a struct termios upon success, NULL upon errors. | |
264 | * It is the caller's responsibility to g_free() the pointer if no | |
265 | * longer needed. | |
266 | */ | |
267 | SR_PRIV void *serial_backup_params(int fd) | |
268 | { | |
269 | sr_dbg("FD %d: Creating serial parameters backup.", fd); | |
270 | ||
271 | #ifdef _WIN32 | |
272 | /* TODO */ | |
273 | #else | |
274 | struct termios *term; | |
275 | ||
276 | if (!(term = g_try_malloc(sizeof(struct termios)))) { | |
277 | sr_err("termios struct malloc failed."); | |
278 | return NULL; | |
279 | } | |
280 | ||
281 | /* Returns 0 upon success, -1 upon failure. */ | |
282 | if (tcgetattr(fd, term) < 0) { | |
283 | sr_err("FD %d: Error getting serial parameters: %s.", | |
284 | strerror(errno)); | |
285 | g_free(term); | |
286 | return NULL; | |
287 | } | |
288 | ||
289 | return term; | |
290 | #endif | |
291 | } | |
292 | ||
293 | /** | |
294 | * Restore serial port settings from a previously created backup. | |
295 | * | |
296 | * @param fd File descriptor of the serial port. | |
297 | * @param backup Pointer to a struct termios which contains the settings | |
298 | * to restore. | |
299 | * | |
300 | * @return 0 upon success, -1 upon failure. | |
301 | */ | |
302 | SR_PRIV int serial_restore_params(int fd, void *backup) | |
303 | { | |
304 | sr_dbg("FD %d: Restoring serial parameters from backup.", fd); | |
305 | ||
306 | #ifdef _WIN32 | |
307 | /* TODO */ | |
308 | #else | |
309 | int ret; | |
310 | ||
311 | /* Returns 0 upon success, -1 upon failure. */ | |
312 | if ((ret = tcsetattr(fd, TCSADRAIN, (struct termios *)backup)) < 0) { | |
313 | sr_err("FD %d: Error restoring serial parameters: %s.", | |
314 | strerror(errno)); | |
315 | } | |
316 | ||
317 | return ret; | |
318 | #endif | |
319 | } | |
320 | ||
321 | /** | |
322 | * Set serial parameters for the specified serial port. | |
323 | * | |
324 | * @param baudrate The baudrate to set. | |
325 | * @param bits The number of data bits to use. | |
326 | * @param parity The parity setting to use (0 = none, 1 = even, 2 = odd). | |
327 | * @param stopbits The number of stop bits to use (1 or 2). | |
328 | * @param flowcontrol The flow control settings to use (0 = none, 1 = RTS/CTS, | |
329 | * 2 = XON/XOFF). | |
330 | * | |
331 | * @return SR_OK upon success, SR_ERR upon failure. | |
332 | */ | |
333 | SR_PRIV int serial_set_params(int fd, int baudrate, int bits, int parity, | |
334 | int stopbits, int flowcontrol) | |
335 | { | |
336 | sr_dbg("FD %d: Setting serial parameters.", fd); | |
337 | ||
338 | #ifdef _WIN32 | |
339 | DCB dcb; | |
340 | ||
341 | if (!GetCommState(hdl, &dcb)) { | |
342 | /* TODO: Error handling. */ | |
343 | return SR_ERR; | |
344 | } | |
345 | ||
346 | switch (baudrate) { | |
347 | /* TODO: Support for higher baud rates. */ | |
348 | case 115200: | |
349 | dcb.BaudRate = CBR_115200; | |
350 | break; | |
351 | case 57600: | |
352 | dcb.BaudRate = CBR_57600; | |
353 | break; | |
354 | case 38400: | |
355 | dcb.BaudRate = CBR_38400; | |
356 | break; | |
357 | case 19200: | |
358 | dcb.BaudRate = CBR_19200; | |
359 | break; | |
360 | case 9600: | |
361 | dcb.BaudRate = CBR_9600; | |
362 | break; | |
363 | case 4800: | |
364 | dcb.BaudRate = CBR_4800; | |
365 | break; | |
366 | case 2400: | |
367 | dcb.BaudRate = CBR_2400; | |
368 | break; | |
369 | default: | |
370 | sr_err("Unsupported baudrate: %d.", baudrate); | |
371 | return SR_ERR; | |
372 | } | |
373 | dcb.ByteSize = bits; | |
374 | dcb.Parity = NOPARITY; /* TODO: Don't hardcode. */ | |
375 | dcb.StopBits = ONESTOPBIT; /* TODO: Don't hardcode. */ | |
376 | ||
377 | if (!SetCommState(hdl, &dcb)) { | |
378 | /* TODO: Error handling. */ | |
379 | return SR_ERR; | |
380 | } | |
381 | #else | |
382 | struct termios term; | |
383 | speed_t baud; | |
384 | ||
385 | sr_dbg("FD %d: Getting terminal settings.", fd); | |
386 | if (tcgetattr(fd, &term) < 0) { | |
387 | sr_err("tcgetattr() error: %ѕ.", strerror(errno)); | |
388 | return SR_ERR; | |
389 | } | |
390 | ||
391 | switch (baudrate) { | |
392 | case 50: | |
393 | baud = B50; | |
394 | break; | |
395 | case 75: | |
396 | baud = B75; | |
397 | break; | |
398 | case 110: | |
399 | baud = B110; | |
400 | break; | |
401 | case 134: | |
402 | baud = B134; | |
403 | break; | |
404 | case 150: | |
405 | baud = B150; | |
406 | break; | |
407 | case 200: | |
408 | baud = B200; | |
409 | break; | |
410 | case 300: | |
411 | baud = B300; | |
412 | break; | |
413 | case 600: | |
414 | baud = B600; | |
415 | break; | |
416 | case 1200: | |
417 | baud = B1200; | |
418 | break; | |
419 | case 1800: | |
420 | baud = B1800; | |
421 | break; | |
422 | case 2400: | |
423 | baud = B2400; | |
424 | break; | |
425 | case 4800: | |
426 | baud = B4800; | |
427 | break; | |
428 | case 9600: | |
429 | baud = B9600; | |
430 | break; | |
431 | case 19200: | |
432 | baud = B19200; | |
433 | break; | |
434 | case 38400: | |
435 | baud = B38400; | |
436 | break; | |
437 | case 57600: | |
438 | baud = B57600; | |
439 | break; | |
440 | case 115200: | |
441 | baud = B115200; | |
442 | break; | |
443 | case 230400: | |
444 | baud = B230400; | |
445 | break; | |
446 | #ifndef __APPLE__ | |
447 | case 460800: | |
448 | baud = B460800; | |
449 | break; | |
450 | #endif | |
451 | default: | |
452 | sr_err("Unsupported baudrate: %d.", baudrate); | |
453 | return SR_ERR; | |
454 | } | |
455 | ||
456 | sr_dbg("FD %d: Configuring output baudrate to %d (%d).", | |
457 | fd, baudrate, baud); | |
458 | if (cfsetospeed(&term, baud) < 0) { | |
459 | sr_err("cfsetospeed() error: %ѕ.", strerror(errno)); | |
460 | return SR_ERR; | |
461 | } | |
462 | ||
463 | sr_dbg("FD %d: Configuring input baudrate to %d (%d).", | |
464 | fd, baudrate, baud); | |
465 | if (cfsetispeed(&term, baud) < 0) { | |
466 | sr_err("cfsetispeed() error: %ѕ.", strerror(errno)); | |
467 | return SR_ERR; | |
468 | } | |
469 | ||
470 | sr_dbg("FD %d: Configuring %d data bits.", fd, bits); | |
471 | term.c_cflag &= ~CSIZE; | |
472 | switch (bits) { | |
473 | case 8: | |
474 | term.c_cflag |= CS8; | |
475 | break; | |
476 | case 7: | |
477 | term.c_cflag |= CS7; | |
478 | break; | |
479 | default: | |
480 | sr_err("Unsupported data bits number: %d.", bits); | |
481 | return SR_ERR; | |
482 | } | |
483 | ||
484 | sr_dbg("FD %d: Configuring %d stop bits.", fd, stopbits); | |
485 | term.c_cflag &= ~CSTOPB; | |
486 | switch (stopbits) { | |
487 | case 1: | |
488 | /* Do nothing, a cleared CSTOPB entry means "1 stop bit". */ | |
489 | break; | |
490 | case 2: | |
491 | term.c_cflag |= CSTOPB; | |
492 | break; | |
493 | default: | |
494 | sr_err("Unsupported stopbits number: %d.", stopbits); | |
495 | return SR_ERR; | |
496 | } | |
497 | ||
498 | term.c_iflag &= ~(IXON | IXOFF); | |
499 | term.c_cflag &= ~CRTSCTS; | |
500 | switch (flowcontrol) { | |
501 | case 0: | |
502 | /* No flow control. */ | |
503 | sr_dbg("FD %d: Configuring no flow control.", fd); | |
504 | break; | |
505 | case 1: | |
506 | sr_dbg("FD %d: Configuring RTS/CTS flow control.", fd); | |
507 | term.c_cflag |= CRTSCTS; | |
508 | break; | |
509 | case 2: | |
510 | sr_dbg("FD %d: Configuring XON/XOFF flow control.", fd); | |
511 | term.c_iflag |= IXON | IXOFF; | |
512 | break; | |
513 | default: | |
514 | sr_err("Unsupported flow control setting: %d.", flowcontrol); | |
515 | return SR_ERR; | |
516 | } | |
517 | ||
518 | term.c_iflag &= ~IGNPAR; | |
519 | term.c_cflag &= ~(PARODD | PARENB); | |
520 | switch (parity) { | |
521 | case SERIAL_PARITY_NONE: | |
522 | sr_dbg("FD %d: Configuring no parity.", fd); | |
523 | term.c_iflag |= IGNPAR; | |
524 | break; | |
525 | case SERIAL_PARITY_EVEN: | |
526 | sr_dbg("FD %d: Configuring even parity.", fd); | |
527 | term.c_cflag |= PARENB; | |
528 | break; | |
529 | case SERIAL_PARITY_ODD: | |
530 | sr_dbg("FD %d: Configuring odd parity.", fd); | |
531 | term.c_cflag |= PARENB | PARODD; | |
532 | break; | |
533 | default: | |
534 | sr_err("Unsupported parity setting: %d.", parity); | |
535 | return SR_ERR; | |
536 | } | |
537 | ||
538 | /* Do NOT translate carriage return to newline on input. */ | |
539 | term.c_iflag &= ~(ICRNL); | |
540 | ||
541 | /* Disable canonical mode, and don't echo input characters. */ | |
542 | term.c_lflag &= ~(ICANON | ECHO); | |
543 | ||
544 | /* Write the configured settings. */ | |
545 | if (tcsetattr(fd, TCSADRAIN, &term) < 0) { | |
546 | sr_err("tcsetattr() error: %ѕ.", strerror(errno)); | |
547 | return SR_ERR; | |
548 | } | |
549 | #endif | |
550 | ||
551 | return SR_OK; | |
552 | } | |
553 | ||
554 | #define SERIAL_COMM_SPEC "^(\\d+)/([78])([neo])([12])$" | |
555 | SR_PRIV int serial_set_paramstr(int fd, const char *paramstr) | |
556 | { | |
557 | GRegex *reg; | |
558 | GMatchInfo *match; | |
559 | int speed, databits, parity, stopbits; | |
560 | char *mstr; | |
561 | ||
562 | speed = databits = parity = stopbits = 0; | |
563 | reg = g_regex_new(SERIAL_COMM_SPEC, 0, 0, NULL); | |
564 | if (g_regex_match(reg, paramstr, 0, &match)) { | |
565 | if ((mstr = g_match_info_fetch(match, 1))) | |
566 | speed = strtoul(mstr, NULL, 10); | |
567 | g_free(mstr); | |
568 | if ((mstr = g_match_info_fetch(match, 2))) | |
569 | databits = strtoul(mstr, NULL, 10); | |
570 | g_free(mstr); | |
571 | if ((mstr = g_match_info_fetch(match, 3))) { | |
572 | switch (mstr[0]) { | |
573 | case 'n': | |
574 | parity = SERIAL_PARITY_NONE; | |
575 | break; | |
576 | case 'e': | |
577 | parity = SERIAL_PARITY_EVEN; | |
578 | break; | |
579 | case 'o': | |
580 | parity = SERIAL_PARITY_ODD; | |
581 | break; | |
582 | } | |
583 | } | |
584 | g_free(mstr); | |
585 | if ((mstr = g_match_info_fetch(match, 4))) | |
586 | stopbits = strtoul(mstr, NULL, 10); | |
587 | g_free(mstr); | |
588 | } | |
589 | g_match_info_unref(match); | |
590 | g_regex_unref(reg); | |
591 | ||
592 | if (speed) | |
593 | return serial_set_params(fd, speed, databits, parity, stopbits, 0); | |
594 | else | |
595 | return SR_ERR_ARG; | |
596 | } | |
597 | ||
598 | SR_PRIV int serial_readline(int fd, char **buf, int *buflen, | |
599 | uint64_t timeout_ms) | |
600 | { | |
601 | uint64_t start; | |
602 | int maxlen, len; | |
603 | ||
604 | timeout_ms *= 1000; | |
605 | start = g_get_monotonic_time(); | |
606 | ||
607 | maxlen = *buflen; | |
608 | *buflen = len = 0; | |
609 | while(1) { | |
610 | len = maxlen - *buflen - 1; | |
611 | if (len < 1) | |
612 | break; | |
613 | len = serial_read(fd, *buf + *buflen, 1); | |
614 | if (len > 0) { | |
615 | *buflen += len; | |
616 | *(*buf + *buflen) = '\0'; | |
617 | if (*buflen > 0 && *(*buf + *buflen - 1) == '\r') { | |
618 | /* Strip LF and terminate. */ | |
619 | *(*buf + --*buflen) = '\0'; | |
620 | break; | |
621 | } | |
622 | } | |
623 | if (g_get_monotonic_time() - start > timeout_ms) | |
624 | /* Timeout */ | |
625 | break; | |
626 | g_usleep(2000); | |
627 | } | |
628 | sr_dbg("Received %d: '%s'.", *buflen, *buf); | |
629 | ||
630 | return SR_OK; | |
631 | } |