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74510d4b ML |
1 | /* |
2 | * This file is part of the libserialport project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de> | |
6 | * Copyright (C) 2013 Martin Ling <martin-libserialport@earth.li> | |
7 | * | |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU Lesser General Public License as | |
10 | * published by the Free Software Foundation, either version 3 of the | |
11 | * License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include <string.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <unistd.h> | |
3b63f34d ML |
27 | #include <stdlib.h> |
28 | #include <errno.h> | |
74510d4b ML |
29 | #ifdef _WIN32 |
30 | #include <windows.h> | |
3b63f34d | 31 | #include <tchar.h> |
74510d4b | 32 | #else |
74510d4b ML |
33 | #include <termios.h> |
34 | #include <sys/ioctl.h> | |
35 | #endif | |
3b63f34d ML |
36 | #ifdef __APPLE__ |
37 | #include <IOKitLib.h> | |
38 | #include <serial/IOSerialKeys.h> | |
39 | #endif | |
40 | #ifdef __linux__ | |
41 | #include "libudev.h" | |
42 | #endif | |
74510d4b ML |
43 | |
44 | #include "serialport.h" | |
45 | ||
3b63f34d ML |
46 | static char **sp_list_new(void) |
47 | { | |
48 | char **list; | |
49 | if ((list = malloc(sizeof(char *)))) | |
50 | list[0] = NULL; | |
51 | return list; | |
52 | } | |
53 | ||
54 | static char **sp_list_append(char **list, void *data, size_t len) | |
55 | { | |
56 | void *tmp; | |
57 | unsigned int count; | |
58 | for (count = 0; list[count]; count++); | |
59 | if (!(tmp = realloc(list, sizeof(char *) * (++count + 1)))) | |
60 | goto fail; | |
61 | list = tmp; | |
62 | if (!(list[count] = malloc(len))) | |
63 | goto fail; | |
64 | memcpy(list[count], data, len); | |
65 | return list; | |
66 | fail: | |
67 | sp_free_port_list(list); | |
68 | return NULL; | |
69 | } | |
70 | ||
68ab64cc ML |
71 | /** |
72 | * List the serial ports available on the system. | |
73 | * | |
74 | * @return A null-terminated array of port name strings. | |
75 | */ | |
3b63f34d ML |
76 | char **sp_list_ports(void) |
77 | { | |
78 | char **list = NULL; | |
79 | ||
80 | #ifdef _WIN32 | |
81 | HKEY key; | |
82 | TCHAR *name, *data; | |
83 | DWORD max_name_len, max_data_size, max_data_len; | |
84 | DWORD name_len, data_size, data_len; | |
85 | DWORD type, index = 0; | |
86 | ||
87 | if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"), | |
88 | 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) | |
89 | return NULL; | |
90 | if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
91 | &max_name_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) | |
92 | goto out_close; | |
93 | max_data_len = max_data_size / sizeof(TCHAR); | |
94 | if (!(name = malloc((max_name_len + 1) * sizeof(TCHAR)))) | |
95 | goto out_close; | |
96 | if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) | |
97 | goto out_free_name; | |
98 | if (!(list = sp_list_new())) | |
99 | goto out; | |
100 | while ( | |
101 | name_len = max_name_len, | |
102 | data_size = max_data_size, | |
103 | RegEnumValue(key, index, name, &name_len, | |
104 | NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS) | |
105 | { | |
106 | data_len = data_size / sizeof(TCHAR); | |
107 | data[data_len] = '\0'; | |
108 | if (type == REG_SZ) | |
109 | if (!(list = sp_list_append(list, | |
110 | data, (data_len + 1) * sizeof(TCHAR)))) | |
111 | goto out; | |
112 | index++; | |
113 | } | |
114 | out: | |
115 | free(data); | |
116 | out_free_name: | |
117 | free(name); | |
118 | out_close: | |
119 | RegCloseKey(key); | |
120 | return list; | |
121 | #endif | |
122 | #ifdef __APPLE__ | |
123 | mach_port_t master; | |
124 | CFMutableDictionaryRef classes; | |
125 | io_iterator_t iter; | |
126 | char *path; | |
127 | io_object_t port; | |
128 | CFTypeRef cf_path; | |
129 | Boolean result; | |
130 | ||
131 | if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) | |
132 | return NULL; | |
133 | ||
134 | if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) | |
135 | return NULL; | |
136 | ||
137 | CFDictionarySetValue(classes, | |
138 | CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes)); | |
139 | ||
140 | if (!(IOServiceGetMatchingServices(master, classes, &iter))) | |
141 | return NULL; | |
142 | ||
143 | if (!(path = malloc(PATH_MAX))) | |
144 | goto out_release; | |
145 | ||
146 | if (!(list = sp_list_new())) | |
147 | goto out; | |
148 | ||
149 | while (port = IOIteratorNext(iter)) { | |
150 | cf_path = IORegistryEntryCreateCFProperty(port, | |
151 | CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0); | |
152 | if (cf_path) { | |
153 | result = CFStringGetCString(cf_path, | |
154 | path, PATH_MAX, kCFStringEncodingASCII); | |
155 | CFRelease(cf_path); | |
156 | if (result) | |
157 | if (!(list = sp_list_append(list, path, strlen(path) + 1))) | |
158 | { | |
159 | IOObjectRelease(port); | |
160 | goto out; | |
161 | } | |
162 | } | |
163 | IOObjectRelease(port); | |
164 | } | |
165 | ||
166 | out: | |
167 | free(path); | |
168 | out_release: | |
169 | IOObjectRelease(iter); | |
170 | return list; | |
171 | #endif | |
172 | #ifdef __linux__ | |
173 | struct udev *ud; | |
174 | struct udev_enumerate *ud_enumerate; | |
175 | struct udev_list_entry *ud_list; | |
176 | struct udev_list_entry *ud_entry; | |
177 | const char *path; | |
178 | struct udev_device *ud_dev; | |
179 | const char *name; | |
180 | ||
181 | ud = udev_new(); | |
182 | ud_enumerate = udev_enumerate_new(ud); | |
183 | udev_enumerate_add_match_subsystem(ud_enumerate, "tty"); | |
184 | udev_enumerate_scan_devices(ud_enumerate); | |
185 | ud_list = udev_enumerate_get_list_entry(ud_enumerate); | |
186 | if (!(list = sp_list_new())) | |
187 | goto out; | |
188 | udev_list_entry_foreach(ud_entry, ud_list) | |
189 | { | |
190 | path = udev_list_entry_get_name(ud_entry); | |
191 | ud_dev = udev_device_new_from_syspath(ud, path); | |
192 | name = udev_device_get_devnode(ud_dev); | |
193 | list = sp_list_append(list, (void *)name, strlen(name) + 1); | |
194 | udev_device_unref(ud_dev); | |
195 | if (!list) | |
196 | goto out; | |
197 | } | |
198 | out: | |
199 | udev_enumerate_unref(ud_enumerate); | |
200 | udev_unref(ud); | |
201 | return list; | |
202 | #endif | |
203 | } | |
204 | ||
68ab64cc ML |
205 | /** |
206 | * Free a port list returned by sp_list_ports. | |
207 | */ | |
3b63f34d ML |
208 | void sp_free_port_list(char **list) |
209 | { | |
210 | unsigned int i; | |
211 | for (i = 0; list[i]; i++) | |
212 | free(list[i]); | |
213 | free(list); | |
214 | } | |
215 | ||
74510d4b ML |
216 | static int sp_validate_port(struct sp_port *port) |
217 | { | |
218 | if (port == NULL) | |
219 | return 0; | |
220 | #ifdef _WIN32 | |
221 | if (port->hdl == INVALID_HANDLE_VALUE) | |
222 | return 0; | |
223 | #else | |
224 | if (port->fd < 0) | |
225 | return 0; | |
226 | #endif | |
227 | return 1; | |
228 | } | |
229 | ||
230 | #define CHECK_PORT() do { if (!sp_validate_port(port)) return SP_ERR_ARG; } while (0) | |
231 | ||
232 | /** | |
233 | * Open the specified serial port. | |
234 | * | |
235 | * @param port Pointer to empty port structure allocated by caller. | |
236 | * @param portname Name of port to open. | |
237 | * @param flags Flags to use when opening the serial port. Possible flags | |
238 | * are: SP_MODE_RDWR, SP_MODE_RDONLY, SP_MODE_NONBLOCK. | |
239 | * | |
240 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
241 | * or SP_ERR_ARG if an invalid port or name is passed. | |
242 | */ | |
243 | int sp_open(struct sp_port *port, char *portname, int flags) | |
244 | { | |
245 | if (!port) | |
246 | return SP_ERR_ARG; | |
247 | ||
248 | if (!portname) | |
249 | return SP_ERR_ARG; | |
250 | ||
251 | port->name = portname; | |
252 | ||
253 | #ifdef _WIN32 | |
254 | DWORD desired_access = 0, flags_and_attributes = 0; | |
255 | /* Map 'flags' to the OS-specific settings. */ | |
256 | desired_access |= GENERIC_READ; | |
257 | flags_and_attributes = FILE_ATTRIBUTE_NORMAL; | |
258 | if (flags & SP_MODE_RDWR) | |
259 | desired_access |= GENERIC_WRITE; | |
260 | if (flags & SP_MODE_NONBLOCK) | |
261 | flags_and_attributes |= FILE_FLAG_OVERLAPPED; | |
262 | ||
263 | port->hdl = CreateFile(port->name, desired_access, 0, 0, | |
264 | OPEN_EXISTING, flags_and_attributes, 0); | |
265 | if (port->hdl == INVALID_HANDLE_VALUE) | |
266 | return SP_ERR_FAIL; | |
267 | #else | |
268 | int flags_local = 0; | |
269 | /* Map 'flags' to the OS-specific settings. */ | |
270 | if (flags & SP_MODE_RDWR) | |
271 | flags_local |= O_RDWR; | |
272 | if (flags & SP_MODE_RDONLY) | |
273 | flags_local |= O_RDONLY; | |
274 | if (flags & SP_MODE_NONBLOCK) | |
275 | flags_local |= O_NONBLOCK; | |
276 | ||
277 | if ((port->fd = open(port->name, flags_local)) < 0) | |
278 | return SP_ERR_FAIL; | |
279 | #endif | |
280 | ||
281 | return SP_OK; | |
282 | } | |
283 | ||
284 | /** | |
285 | * Close the specified serial port. | |
286 | * | |
287 | * @param port Pointer to port structure. | |
288 | * | |
289 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
290 | * or SP_ERR_ARG if an invalid port is passed. | |
291 | */ | |
292 | int sp_close(struct sp_port *port) | |
293 | { | |
294 | CHECK_PORT(); | |
295 | ||
296 | #ifdef _WIN32 | |
297 | /* Returns non-zero upon success, 0 upon failure. */ | |
298 | if (CloseHandle(port->hdl) == 0) | |
299 | return SP_ERR_FAIL; | |
300 | #else | |
301 | /* Returns 0 upon success, -1 upon failure. */ | |
302 | if (close(port->fd) == -1) | |
303 | return SP_ERR_FAIL; | |
304 | #endif | |
305 | ||
306 | return SP_OK; | |
307 | } | |
308 | ||
309 | /** | |
310 | * Flush serial port buffers. | |
311 | * | |
312 | * @param port Pointer to port structure. | |
313 | * | |
314 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
315 | * or SP_ERR_ARG if an invalid port is passed. | |
316 | */ | |
317 | int sp_flush(struct sp_port *port) | |
318 | { | |
319 | CHECK_PORT(); | |
320 | ||
321 | #ifdef _WIN32 | |
322 | /* Returns non-zero upon success, 0 upon failure. */ | |
323 | if (PurgeComm(port->hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0) | |
324 | return SP_ERR_FAIL; | |
325 | #else | |
326 | /* Returns 0 upon success, -1 upon failure. */ | |
327 | if (tcflush(port->fd, TCIOFLUSH) < 0) | |
328 | return SP_ERR_FAIL; | |
329 | #endif | |
330 | return SP_OK; | |
331 | } | |
332 | ||
333 | /** | |
334 | * Write a number of bytes to the specified serial port. | |
335 | * | |
336 | * @param port Pointer to port structure. | |
337 | * @param buf Buffer containing the bytes to write. | |
338 | * @param count Number of bytes to write. | |
339 | * | |
340 | * @return The number of bytes written, SP_ERR_FAIL on failure, | |
341 | * or SP_ERR_ARG if an invalid port is passed. | |
342 | */ | |
343 | int sp_write(struct sp_port *port, const void *buf, size_t count) | |
344 | { | |
345 | CHECK_PORT(); | |
346 | ||
347 | if (!buf) | |
348 | return SP_ERR_ARG; | |
349 | ||
350 | #ifdef _WIN32 | |
351 | DWORD written = 0; | |
352 | /* Returns non-zero upon success, 0 upon failure. */ | |
353 | if (WriteFile(port->hdl, buf, count, &written, NULL) == 0) | |
354 | return SP_ERR_FAIL; | |
355 | return written; | |
356 | #else | |
357 | /* Returns the number of bytes written, or -1 upon failure. */ | |
358 | ssize_t written = write(port->fd, buf, count); | |
359 | if (written < 0) | |
360 | return SP_ERR_FAIL; | |
361 | else | |
362 | return written;; | |
363 | #endif | |
364 | } | |
365 | ||
366 | /** | |
367 | * Read a number of bytes from the specified serial port. | |
368 | * | |
369 | * @param port Pointer to port structure. | |
370 | * @param buf Buffer where to store the bytes that are read. | |
371 | * @param count The number of bytes to read. | |
372 | * | |
373 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
374 | * or SP_ERR_ARG if an invalid port is passed. | |
375 | */ | |
376 | int sp_read(struct sp_port *port, void *buf, size_t count) | |
377 | { | |
378 | CHECK_PORT(); | |
379 | ||
380 | if (!buf) | |
381 | return SP_ERR_ARG; | |
382 | ||
383 | #ifdef _WIN32 | |
384 | DWORD bytes_read = 0; | |
385 | /* Returns non-zero upon success, 0 upon failure. */ | |
386 | if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0) | |
387 | return SP_ERR_FAIL; | |
388 | return bytes_read; | |
389 | #else | |
390 | ssize_t bytes_read; | |
391 | /* Returns the number of bytes read, or -1 upon failure. */ | |
392 | if ((bytes_read = read(port->fd, buf, count)) < 0) | |
393 | return SP_ERR_FAIL; | |
394 | return bytes_read; | |
395 | #endif | |
396 | } | |
397 | ||
398 | /** | |
399 | * Set serial parameters for the specified serial port. | |
400 | * | |
401 | * @param port Pointer to port structure. | |
402 | * @param baudrate The baudrate to set. | |
403 | * @param bits The number of data bits to use. | |
404 | * @param parity The parity setting to use (0 = none, 1 = even, 2 = odd). | |
405 | * @param stopbits The number of stop bits to use (1 or 2). | |
406 | * @param flowcontrol The flow control settings to use (0 = none, 1 = RTS/CTS, | |
407 | * 2 = XON/XOFF). | |
408 | * | |
409 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
410 | * or SP_ERR_ARG if an invalid argument is passed. | |
411 | */ | |
412 | int sp_set_params(struct sp_port *port, int baudrate, | |
413 | int bits, int parity, int stopbits, | |
414 | int flowcontrol, int rts, int dtr) | |
415 | { | |
416 | CHECK_PORT(); | |
417 | ||
418 | #ifdef _WIN32 | |
419 | DCB dcb; | |
420 | ||
421 | if (!GetCommState(port->hdl, &dcb)) | |
422 | return SP_ERR_FAIL; | |
423 | ||
424 | switch (baudrate) { | |
425 | /* | |
426 | * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to | |
427 | * have documented CBR_* macros. | |
428 | */ | |
429 | case 110: | |
430 | dcb.BaudRate = CBR_110; | |
431 | break; | |
432 | case 300: | |
433 | dcb.BaudRate = CBR_300; | |
434 | break; | |
435 | case 600: | |
436 | dcb.BaudRate = CBR_600; | |
437 | break; | |
438 | case 1200: | |
439 | dcb.BaudRate = CBR_1200; | |
440 | break; | |
441 | case 2400: | |
442 | dcb.BaudRate = CBR_2400; | |
443 | break; | |
444 | case 4800: | |
445 | dcb.BaudRate = CBR_4800; | |
446 | break; | |
447 | case 9600: | |
448 | dcb.BaudRate = CBR_9600; | |
449 | break; | |
450 | case 14400: | |
451 | dcb.BaudRate = CBR_14400; /* Not available on Unix? */ | |
452 | break; | |
453 | case 19200: | |
454 | dcb.BaudRate = CBR_19200; | |
455 | break; | |
456 | case 38400: | |
457 | dcb.BaudRate = CBR_38400; | |
458 | break; | |
459 | case 57600: | |
460 | dcb.BaudRate = CBR_57600; | |
461 | break; | |
462 | case 115200: | |
463 | dcb.BaudRate = CBR_115200; | |
464 | break; | |
465 | case 128000: | |
466 | dcb.BaudRate = CBR_128000; /* Not available on Unix? */ | |
467 | break; | |
468 | case 256000: | |
469 | dcb.BaudRate = CBR_256000; /* Not available on Unix? */ | |
470 | break; | |
471 | default: | |
472 | return SP_ERR_ARG; | |
473 | } | |
474 | ||
475 | switch (stopbits) { | |
476 | /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */ | |
477 | case 1: | |
478 | dcb.StopBits = ONESTOPBIT; | |
479 | break; | |
480 | case 2: | |
481 | dcb.StopBits = TWOSTOPBITS; | |
482 | break; | |
483 | default: | |
484 | return SP_ERR_ARG; | |
485 | } | |
486 | ||
487 | switch (parity) { | |
488 | /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */ | |
489 | case SP_PARITY_NONE: | |
490 | dcb.Parity = NOPARITY; | |
491 | break; | |
492 | case SP_PARITY_EVEN: | |
493 | dcb.Parity = EVENPARITY; | |
494 | break; | |
495 | case SP_PARITY_ODD: | |
496 | dcb.Parity = ODDPARITY; | |
497 | break; | |
498 | default: | |
499 | return SP_ERR_ARG; | |
500 | } | |
501 | ||
502 | if (rts != -1) { | |
503 | if (rts) | |
504 | dcb.fRtsControl = RTS_CONTROL_ENABLE; | |
505 | else | |
506 | dcb.fRtsControl = RTS_CONTROL_DISABLE; | |
507 | } | |
508 | ||
509 | if (dtr != -1) { | |
510 | if (dtr) | |
511 | dcb.fDtrControl = DTR_CONTROL_ENABLE; | |
512 | else | |
513 | dcb.fDtrControl = DTR_CONTROL_DISABLE; | |
514 | } | |
515 | ||
516 | if (!SetCommState(port->hdl, &dcb)) | |
517 | return SP_ERR_FAIL; | |
518 | #else | |
519 | struct termios term; | |
520 | speed_t baud; | |
521 | int controlbits; | |
522 | ||
523 | if (tcgetattr(port->fd, &term) < 0) | |
524 | return SP_ERR_FAIL; | |
525 | ||
526 | switch (baudrate) { | |
527 | case 50: | |
528 | baud = B50; | |
529 | break; | |
530 | case 75: | |
531 | baud = B75; | |
532 | break; | |
533 | case 110: | |
534 | baud = B110; | |
535 | break; | |
536 | case 134: | |
537 | baud = B134; | |
538 | break; | |
539 | case 150: | |
540 | baud = B150; | |
541 | break; | |
542 | case 200: | |
543 | baud = B200; | |
544 | break; | |
545 | case 300: | |
546 | baud = B300; | |
547 | break; | |
548 | case 600: | |
549 | baud = B600; | |
550 | break; | |
551 | case 1200: | |
552 | baud = B1200; | |
553 | break; | |
554 | case 1800: | |
555 | baud = B1800; | |
556 | break; | |
557 | case 2400: | |
558 | baud = B2400; | |
559 | break; | |
560 | case 4800: | |
561 | baud = B4800; | |
562 | break; | |
563 | case 9600: | |
564 | baud = B9600; | |
565 | break; | |
566 | case 19200: | |
567 | baud = B19200; | |
568 | break; | |
569 | case 38400: | |
570 | baud = B38400; | |
571 | break; | |
572 | case 57600: | |
573 | baud = B57600; | |
574 | break; | |
575 | case 115200: | |
576 | baud = B115200; | |
577 | break; | |
578 | case 230400: | |
579 | baud = B230400; | |
580 | break; | |
581 | #if !defined(__APPLE__) && !defined(__OpenBSD__) | |
582 | case 460800: | |
583 | baud = B460800; | |
584 | break; | |
585 | #endif | |
586 | default: | |
587 | return SP_ERR_ARG; | |
588 | } | |
589 | ||
590 | if (cfsetospeed(&term, baud) < 0) | |
591 | return SP_ERR_FAIL; | |
592 | ||
593 | if (cfsetispeed(&term, baud) < 0) | |
594 | return SP_ERR_FAIL; | |
595 | ||
596 | term.c_cflag &= ~CSIZE; | |
597 | switch (bits) { | |
598 | case 8: | |
599 | term.c_cflag |= CS8; | |
600 | break; | |
601 | case 7: | |
602 | term.c_cflag |= CS7; | |
603 | break; | |
604 | default: | |
605 | return SP_ERR_ARG; | |
606 | } | |
607 | ||
608 | term.c_cflag &= ~CSTOPB; | |
609 | switch (stopbits) { | |
610 | case 1: | |
611 | term.c_cflag &= ~CSTOPB; | |
612 | break; | |
613 | case 2: | |
614 | term.c_cflag |= CSTOPB; | |
615 | break; | |
616 | default: | |
617 | return SP_ERR_ARG; | |
618 | } | |
619 | ||
620 | term.c_iflag &= ~(IXON | IXOFF); | |
621 | term.c_cflag &= ~CRTSCTS; | |
622 | switch (flowcontrol) { | |
623 | case 0: | |
624 | /* No flow control. */ | |
625 | break; | |
626 | case 1: | |
627 | term.c_cflag |= CRTSCTS; | |
628 | break; | |
629 | case 2: | |
630 | term.c_iflag |= IXON | IXOFF; | |
631 | break; | |
632 | default: | |
633 | return SP_ERR_ARG; | |
634 | } | |
635 | ||
636 | term.c_iflag &= ~IGNPAR; | |
637 | term.c_cflag &= ~(PARODD | PARENB); | |
638 | switch (parity) { | |
639 | case SP_PARITY_NONE: | |
640 | term.c_iflag |= IGNPAR; | |
641 | break; | |
642 | case SP_PARITY_EVEN: | |
643 | term.c_cflag |= PARENB; | |
644 | break; | |
645 | case SP_PARITY_ODD: | |
646 | term.c_cflag |= PARENB | PARODD; | |
647 | break; | |
648 | default: | |
649 | return SP_ERR_ARG; | |
650 | } | |
651 | ||
652 | /* Turn off all serial port cooking. */ | |
653 | term.c_iflag &= ~(ISTRIP | INLCR | ICRNL); | |
654 | term.c_oflag &= ~(ONLCR | OCRNL | ONOCR); | |
655 | #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) | |
656 | term.c_oflag &= ~OFILL; | |
657 | #endif | |
658 | ||
659 | /* Disable canonical mode, and don't echo input characters. */ | |
660 | term.c_lflag &= ~(ICANON | ECHO); | |
661 | ||
662 | /* Write the configured settings. */ | |
663 | if (tcsetattr(port->fd, TCSADRAIN, &term) < 0) | |
664 | return SP_ERR_FAIL; | |
665 | ||
666 | if (rts != -1) { | |
667 | controlbits = TIOCM_RTS; | |
668 | if (ioctl(port->fd, rts ? TIOCMBIS : TIOCMBIC, | |
669 | &controlbits) < 0) | |
670 | return SP_ERR_FAIL; | |
671 | } | |
672 | ||
673 | if (dtr != -1) { | |
674 | controlbits = TIOCM_DTR; | |
675 | if (ioctl(port->fd, dtr ? TIOCMBIS : TIOCMBIC, | |
676 | &controlbits) < 0) | |
677 | return SP_ERR_FAIL; | |
678 | } | |
679 | #endif | |
680 | ||
681 | return SP_OK; | |
682 | } | |
683 | ||
684 | /** | |
685 | * Get error code for failed operation. | |
686 | * | |
687 | * In order to obtain the correct result, this function should be called | |
688 | * straight after the failure, before executing any other system operations. | |
689 | * | |
690 | * @return The system's numeric code for the error that caused the last | |
691 | * operation to fail. | |
692 | */ | |
693 | int sp_last_error_code(void) | |
694 | { | |
695 | #ifdef _WIN32 | |
696 | return GetLastError(); | |
697 | #else | |
698 | return errno; | |
699 | #endif | |
700 | } | |
701 | ||
702 | /** | |
703 | * Get error message for failed operation. | |
704 | * | |
705 | * In order to obtain the correct result, this function should be called | |
706 | * straight after the failure, before executing other system operations. | |
707 | * | |
708 | * @return The system's message for the error that caused the last | |
709 | * operation to fail. This string may be allocated by the function, | |
710 | * and can be freed after use by calling sp_free_error_message. | |
711 | */ | |
712 | char *sp_last_error_message(void) | |
713 | { | |
714 | #ifdef _WIN32 | |
715 | LPVOID message; | |
716 | DWORD error = GetLastError(); | |
717 | ||
718 | FormatMessage( | |
719 | FORMAT_MESSAGE_ALLOCATE_BUFFER | | |
720 | FORMAT_MESSAGE_FROM_SYSTEM | | |
721 | FORMAT_MESSAGE_IGNORE_INSERTS, | |
722 | NULL, | |
723 | error, | |
724 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | |
725 | (LPTSTR) &message, | |
726 | 0, NULL ); | |
727 | ||
728 | return message; | |
729 | #else | |
730 | return strerror(errno); | |
731 | #endif | |
732 | } | |
733 | ||
734 | /** | |
735 | * Free error message. | |
736 | * | |
737 | * This function can be used to free a string returned by the | |
738 | * sp_last_error_message function. | |
739 | */ | |
740 | void sp_free_error_message(char *message) | |
741 | { | |
742 | #ifdef _WIN32 | |
743 | LocalFree(message); | |
64eec30d ML |
744 | #else |
745 | (void)message; | |
74510d4b ML |
746 | #endif |
747 | } |