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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++); | |
db2794ce | 59 | if (!(tmp = realloc(list, sizeof(char *) * (count + 2)))) |
3b63f34d ML |
60 | goto fail; |
61 | list = tmp; | |
62 | if (!(list[count] = malloc(len))) | |
63 | goto fail; | |
64 | memcpy(list[count], data, len); | |
db2794ce | 65 | list[count + 1] = NULL; |
3b63f34d ML |
66 | return list; |
67 | fail: | |
68 | sp_free_port_list(list); | |
69 | return NULL; | |
70 | } | |
71 | ||
68ab64cc ML |
72 | /** |
73 | * List the serial ports available on the system. | |
74 | * | |
75 | * @return A null-terminated array of port name strings. | |
76 | */ | |
3b63f34d ML |
77 | char **sp_list_ports(void) |
78 | { | |
79 | char **list = NULL; | |
80 | ||
81 | #ifdef _WIN32 | |
82 | HKEY key; | |
83 | TCHAR *name, *data; | |
84 | DWORD max_name_len, max_data_size, max_data_len; | |
85 | DWORD name_len, data_size, data_len; | |
86 | DWORD type, index = 0; | |
87 | ||
88 | if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"), | |
89 | 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) | |
90 | return NULL; | |
91 | if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
92 | &max_name_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) | |
93 | goto out_close; | |
94 | max_data_len = max_data_size / sizeof(TCHAR); | |
95 | if (!(name = malloc((max_name_len + 1) * sizeof(TCHAR)))) | |
96 | goto out_close; | |
97 | if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) | |
98 | goto out_free_name; | |
99 | if (!(list = sp_list_new())) | |
100 | goto out; | |
101 | while ( | |
102 | name_len = max_name_len, | |
103 | data_size = max_data_size, | |
104 | RegEnumValue(key, index, name, &name_len, | |
105 | NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS) | |
106 | { | |
107 | data_len = data_size / sizeof(TCHAR); | |
108 | data[data_len] = '\0'; | |
109 | if (type == REG_SZ) | |
110 | if (!(list = sp_list_append(list, | |
111 | data, (data_len + 1) * sizeof(TCHAR)))) | |
112 | goto out; | |
113 | index++; | |
114 | } | |
115 | out: | |
116 | free(data); | |
117 | out_free_name: | |
118 | free(name); | |
119 | out_close: | |
120 | RegCloseKey(key); | |
121 | return list; | |
122 | #endif | |
123 | #ifdef __APPLE__ | |
124 | mach_port_t master; | |
125 | CFMutableDictionaryRef classes; | |
126 | io_iterator_t iter; | |
127 | char *path; | |
128 | io_object_t port; | |
129 | CFTypeRef cf_path; | |
130 | Boolean result; | |
131 | ||
132 | if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) | |
133 | return NULL; | |
134 | ||
135 | if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) | |
136 | return NULL; | |
137 | ||
138 | CFDictionarySetValue(classes, | |
139 | CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes)); | |
140 | ||
141 | if (!(IOServiceGetMatchingServices(master, classes, &iter))) | |
142 | return NULL; | |
143 | ||
144 | if (!(path = malloc(PATH_MAX))) | |
145 | goto out_release; | |
146 | ||
147 | if (!(list = sp_list_new())) | |
148 | goto out; | |
149 | ||
150 | while (port = IOIteratorNext(iter)) { | |
151 | cf_path = IORegistryEntryCreateCFProperty(port, | |
152 | CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0); | |
153 | if (cf_path) { | |
154 | result = CFStringGetCString(cf_path, | |
155 | path, PATH_MAX, kCFStringEncodingASCII); | |
156 | CFRelease(cf_path); | |
157 | if (result) | |
158 | if (!(list = sp_list_append(list, path, strlen(path) + 1))) | |
159 | { | |
160 | IOObjectRelease(port); | |
161 | goto out; | |
162 | } | |
163 | } | |
164 | IOObjectRelease(port); | |
165 | } | |
166 | ||
167 | out: | |
168 | free(path); | |
169 | out_release: | |
170 | IOObjectRelease(iter); | |
171 | return list; | |
172 | #endif | |
173 | #ifdef __linux__ | |
174 | struct udev *ud; | |
175 | struct udev_enumerate *ud_enumerate; | |
176 | struct udev_list_entry *ud_list; | |
177 | struct udev_list_entry *ud_entry; | |
178 | const char *path; | |
179 | struct udev_device *ud_dev; | |
180 | const char *name; | |
181 | ||
182 | ud = udev_new(); | |
183 | ud_enumerate = udev_enumerate_new(ud); | |
184 | udev_enumerate_add_match_subsystem(ud_enumerate, "tty"); | |
185 | udev_enumerate_scan_devices(ud_enumerate); | |
186 | ud_list = udev_enumerate_get_list_entry(ud_enumerate); | |
187 | if (!(list = sp_list_new())) | |
188 | goto out; | |
189 | udev_list_entry_foreach(ud_entry, ud_list) | |
190 | { | |
191 | path = udev_list_entry_get_name(ud_entry); | |
192 | ud_dev = udev_device_new_from_syspath(ud, path); | |
193 | name = udev_device_get_devnode(ud_dev); | |
194 | list = sp_list_append(list, (void *)name, strlen(name) + 1); | |
195 | udev_device_unref(ud_dev); | |
196 | if (!list) | |
197 | goto out; | |
198 | } | |
199 | out: | |
200 | udev_enumerate_unref(ud_enumerate); | |
201 | udev_unref(ud); | |
202 | return list; | |
203 | #endif | |
204 | } | |
205 | ||
68ab64cc ML |
206 | /** |
207 | * Free a port list returned by sp_list_ports. | |
208 | */ | |
3b63f34d ML |
209 | void sp_free_port_list(char **list) |
210 | { | |
211 | unsigned int i; | |
212 | for (i = 0; list[i]; i++) | |
213 | free(list[i]); | |
214 | free(list); | |
215 | } | |
216 | ||
74510d4b ML |
217 | static int sp_validate_port(struct sp_port *port) |
218 | { | |
219 | if (port == NULL) | |
220 | return 0; | |
221 | #ifdef _WIN32 | |
222 | if (port->hdl == INVALID_HANDLE_VALUE) | |
223 | return 0; | |
224 | #else | |
225 | if (port->fd < 0) | |
226 | return 0; | |
227 | #endif | |
228 | return 1; | |
229 | } | |
230 | ||
231 | #define CHECK_PORT() do { if (!sp_validate_port(port)) return SP_ERR_ARG; } while (0) | |
232 | ||
233 | /** | |
234 | * Open the specified serial port. | |
235 | * | |
236 | * @param port Pointer to empty port structure allocated by caller. | |
237 | * @param portname Name of port to open. | |
238 | * @param flags Flags to use when opening the serial port. Possible flags | |
239 | * are: SP_MODE_RDWR, SP_MODE_RDONLY, SP_MODE_NONBLOCK. | |
240 | * | |
241 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
242 | * or SP_ERR_ARG if an invalid port or name is passed. | |
243 | */ | |
244 | int sp_open(struct sp_port *port, char *portname, int flags) | |
245 | { | |
246 | if (!port) | |
247 | return SP_ERR_ARG; | |
248 | ||
249 | if (!portname) | |
250 | return SP_ERR_ARG; | |
251 | ||
252 | port->name = portname; | |
253 | ||
254 | #ifdef _WIN32 | |
255 | DWORD desired_access = 0, flags_and_attributes = 0; | |
256 | /* Map 'flags' to the OS-specific settings. */ | |
257 | desired_access |= GENERIC_READ; | |
258 | flags_and_attributes = FILE_ATTRIBUTE_NORMAL; | |
259 | if (flags & SP_MODE_RDWR) | |
260 | desired_access |= GENERIC_WRITE; | |
261 | if (flags & SP_MODE_NONBLOCK) | |
262 | flags_and_attributes |= FILE_FLAG_OVERLAPPED; | |
263 | ||
264 | port->hdl = CreateFile(port->name, desired_access, 0, 0, | |
265 | OPEN_EXISTING, flags_and_attributes, 0); | |
266 | if (port->hdl == INVALID_HANDLE_VALUE) | |
267 | return SP_ERR_FAIL; | |
268 | #else | |
269 | int flags_local = 0; | |
270 | /* Map 'flags' to the OS-specific settings. */ | |
271 | if (flags & SP_MODE_RDWR) | |
272 | flags_local |= O_RDWR; | |
273 | if (flags & SP_MODE_RDONLY) | |
274 | flags_local |= O_RDONLY; | |
275 | if (flags & SP_MODE_NONBLOCK) | |
276 | flags_local |= O_NONBLOCK; | |
277 | ||
278 | if ((port->fd = open(port->name, flags_local)) < 0) | |
279 | return SP_ERR_FAIL; | |
280 | #endif | |
281 | ||
282 | return SP_OK; | |
283 | } | |
284 | ||
285 | /** | |
286 | * Close the specified serial port. | |
287 | * | |
288 | * @param port Pointer to port structure. | |
289 | * | |
290 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
291 | * or SP_ERR_ARG if an invalid port is passed. | |
292 | */ | |
293 | int sp_close(struct sp_port *port) | |
294 | { | |
295 | CHECK_PORT(); | |
296 | ||
297 | #ifdef _WIN32 | |
298 | /* Returns non-zero upon success, 0 upon failure. */ | |
299 | if (CloseHandle(port->hdl) == 0) | |
300 | return SP_ERR_FAIL; | |
301 | #else | |
302 | /* Returns 0 upon success, -1 upon failure. */ | |
303 | if (close(port->fd) == -1) | |
304 | return SP_ERR_FAIL; | |
305 | #endif | |
306 | ||
307 | return SP_OK; | |
308 | } | |
309 | ||
310 | /** | |
311 | * Flush serial port buffers. | |
312 | * | |
313 | * @param port Pointer to port structure. | |
314 | * | |
315 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
316 | * or SP_ERR_ARG if an invalid port is passed. | |
317 | */ | |
318 | int sp_flush(struct sp_port *port) | |
319 | { | |
320 | CHECK_PORT(); | |
321 | ||
322 | #ifdef _WIN32 | |
323 | /* Returns non-zero upon success, 0 upon failure. */ | |
324 | if (PurgeComm(port->hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0) | |
325 | return SP_ERR_FAIL; | |
326 | #else | |
327 | /* Returns 0 upon success, -1 upon failure. */ | |
328 | if (tcflush(port->fd, TCIOFLUSH) < 0) | |
329 | return SP_ERR_FAIL; | |
330 | #endif | |
331 | return SP_OK; | |
332 | } | |
333 | ||
334 | /** | |
335 | * Write a number of bytes to the specified serial port. | |
336 | * | |
337 | * @param port Pointer to port structure. | |
338 | * @param buf Buffer containing the bytes to write. | |
339 | * @param count Number of bytes to write. | |
340 | * | |
341 | * @return The number of bytes written, SP_ERR_FAIL on failure, | |
342 | * or SP_ERR_ARG if an invalid port is passed. | |
343 | */ | |
344 | int sp_write(struct sp_port *port, const void *buf, size_t count) | |
345 | { | |
346 | CHECK_PORT(); | |
347 | ||
348 | if (!buf) | |
349 | return SP_ERR_ARG; | |
350 | ||
351 | #ifdef _WIN32 | |
352 | DWORD written = 0; | |
353 | /* Returns non-zero upon success, 0 upon failure. */ | |
354 | if (WriteFile(port->hdl, buf, count, &written, NULL) == 0) | |
355 | return SP_ERR_FAIL; | |
356 | return written; | |
357 | #else | |
358 | /* Returns the number of bytes written, or -1 upon failure. */ | |
359 | ssize_t written = write(port->fd, buf, count); | |
360 | if (written < 0) | |
361 | return SP_ERR_FAIL; | |
362 | else | |
363 | return written;; | |
364 | #endif | |
365 | } | |
366 | ||
367 | /** | |
368 | * Read a number of bytes from the specified serial port. | |
369 | * | |
370 | * @param port Pointer to port structure. | |
371 | * @param buf Buffer where to store the bytes that are read. | |
372 | * @param count The number of bytes to read. | |
373 | * | |
374 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
375 | * or SP_ERR_ARG if an invalid port is passed. | |
376 | */ | |
377 | int sp_read(struct sp_port *port, void *buf, size_t count) | |
378 | { | |
379 | CHECK_PORT(); | |
380 | ||
381 | if (!buf) | |
382 | return SP_ERR_ARG; | |
383 | ||
384 | #ifdef _WIN32 | |
385 | DWORD bytes_read = 0; | |
386 | /* Returns non-zero upon success, 0 upon failure. */ | |
387 | if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0) | |
388 | return SP_ERR_FAIL; | |
389 | return bytes_read; | |
390 | #else | |
391 | ssize_t bytes_read; | |
392 | /* Returns the number of bytes read, or -1 upon failure. */ | |
393 | if ((bytes_read = read(port->fd, buf, count)) < 0) | |
394 | return SP_ERR_FAIL; | |
395 | return bytes_read; | |
396 | #endif | |
397 | } | |
398 | ||
399 | /** | |
400 | * Set serial parameters for the specified serial port. | |
401 | * | |
402 | * @param port Pointer to port structure. | |
403 | * @param baudrate The baudrate to set. | |
404 | * @param bits The number of data bits to use. | |
405 | * @param parity The parity setting to use (0 = none, 1 = even, 2 = odd). | |
406 | * @param stopbits The number of stop bits to use (1 or 2). | |
407 | * @param flowcontrol The flow control settings to use (0 = none, 1 = RTS/CTS, | |
408 | * 2 = XON/XOFF). | |
409 | * | |
410 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
411 | * or SP_ERR_ARG if an invalid argument is passed. | |
412 | */ | |
413 | int sp_set_params(struct sp_port *port, int baudrate, | |
414 | int bits, int parity, int stopbits, | |
415 | int flowcontrol, int rts, int dtr) | |
416 | { | |
417 | CHECK_PORT(); | |
418 | ||
419 | #ifdef _WIN32 | |
420 | DCB dcb; | |
421 | ||
422 | if (!GetCommState(port->hdl, &dcb)) | |
423 | return SP_ERR_FAIL; | |
424 | ||
425 | switch (baudrate) { | |
426 | /* | |
427 | * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to | |
428 | * have documented CBR_* macros. | |
429 | */ | |
430 | case 110: | |
431 | dcb.BaudRate = CBR_110; | |
432 | break; | |
433 | case 300: | |
434 | dcb.BaudRate = CBR_300; | |
435 | break; | |
436 | case 600: | |
437 | dcb.BaudRate = CBR_600; | |
438 | break; | |
439 | case 1200: | |
440 | dcb.BaudRate = CBR_1200; | |
441 | break; | |
442 | case 2400: | |
443 | dcb.BaudRate = CBR_2400; | |
444 | break; | |
445 | case 4800: | |
446 | dcb.BaudRate = CBR_4800; | |
447 | break; | |
448 | case 9600: | |
449 | dcb.BaudRate = CBR_9600; | |
450 | break; | |
451 | case 14400: | |
452 | dcb.BaudRate = CBR_14400; /* Not available on Unix? */ | |
453 | break; | |
454 | case 19200: | |
455 | dcb.BaudRate = CBR_19200; | |
456 | break; | |
457 | case 38400: | |
458 | dcb.BaudRate = CBR_38400; | |
459 | break; | |
460 | case 57600: | |
461 | dcb.BaudRate = CBR_57600; | |
462 | break; | |
463 | case 115200: | |
464 | dcb.BaudRate = CBR_115200; | |
465 | break; | |
466 | case 128000: | |
467 | dcb.BaudRate = CBR_128000; /* Not available on Unix? */ | |
468 | break; | |
469 | case 256000: | |
470 | dcb.BaudRate = CBR_256000; /* Not available on Unix? */ | |
471 | break; | |
472 | default: | |
473 | return SP_ERR_ARG; | |
474 | } | |
475 | ||
476 | switch (stopbits) { | |
477 | /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */ | |
478 | case 1: | |
479 | dcb.StopBits = ONESTOPBIT; | |
480 | break; | |
481 | case 2: | |
482 | dcb.StopBits = TWOSTOPBITS; | |
483 | break; | |
484 | default: | |
485 | return SP_ERR_ARG; | |
486 | } | |
487 | ||
488 | switch (parity) { | |
489 | /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */ | |
490 | case SP_PARITY_NONE: | |
491 | dcb.Parity = NOPARITY; | |
492 | break; | |
493 | case SP_PARITY_EVEN: | |
494 | dcb.Parity = EVENPARITY; | |
495 | break; | |
496 | case SP_PARITY_ODD: | |
497 | dcb.Parity = ODDPARITY; | |
498 | break; | |
499 | default: | |
500 | return SP_ERR_ARG; | |
501 | } | |
502 | ||
503 | if (rts != -1) { | |
504 | if (rts) | |
505 | dcb.fRtsControl = RTS_CONTROL_ENABLE; | |
506 | else | |
507 | dcb.fRtsControl = RTS_CONTROL_DISABLE; | |
508 | } | |
509 | ||
510 | if (dtr != -1) { | |
511 | if (dtr) | |
512 | dcb.fDtrControl = DTR_CONTROL_ENABLE; | |
513 | else | |
514 | dcb.fDtrControl = DTR_CONTROL_DISABLE; | |
515 | } | |
516 | ||
517 | if (!SetCommState(port->hdl, &dcb)) | |
518 | return SP_ERR_FAIL; | |
519 | #else | |
520 | struct termios term; | |
521 | speed_t baud; | |
522 | int controlbits; | |
523 | ||
524 | if (tcgetattr(port->fd, &term) < 0) | |
525 | return SP_ERR_FAIL; | |
526 | ||
527 | switch (baudrate) { | |
528 | case 50: | |
529 | baud = B50; | |
530 | break; | |
531 | case 75: | |
532 | baud = B75; | |
533 | break; | |
534 | case 110: | |
535 | baud = B110; | |
536 | break; | |
537 | case 134: | |
538 | baud = B134; | |
539 | break; | |
540 | case 150: | |
541 | baud = B150; | |
542 | break; | |
543 | case 200: | |
544 | baud = B200; | |
545 | break; | |
546 | case 300: | |
547 | baud = B300; | |
548 | break; | |
549 | case 600: | |
550 | baud = B600; | |
551 | break; | |
552 | case 1200: | |
553 | baud = B1200; | |
554 | break; | |
555 | case 1800: | |
556 | baud = B1800; | |
557 | break; | |
558 | case 2400: | |
559 | baud = B2400; | |
560 | break; | |
561 | case 4800: | |
562 | baud = B4800; | |
563 | break; | |
564 | case 9600: | |
565 | baud = B9600; | |
566 | break; | |
567 | case 19200: | |
568 | baud = B19200; | |
569 | break; | |
570 | case 38400: | |
571 | baud = B38400; | |
572 | break; | |
573 | case 57600: | |
574 | baud = B57600; | |
575 | break; | |
576 | case 115200: | |
577 | baud = B115200; | |
578 | break; | |
579 | case 230400: | |
580 | baud = B230400; | |
581 | break; | |
582 | #if !defined(__APPLE__) && !defined(__OpenBSD__) | |
583 | case 460800: | |
584 | baud = B460800; | |
585 | break; | |
586 | #endif | |
587 | default: | |
588 | return SP_ERR_ARG; | |
589 | } | |
590 | ||
591 | if (cfsetospeed(&term, baud) < 0) | |
592 | return SP_ERR_FAIL; | |
593 | ||
594 | if (cfsetispeed(&term, baud) < 0) | |
595 | return SP_ERR_FAIL; | |
596 | ||
597 | term.c_cflag &= ~CSIZE; | |
598 | switch (bits) { | |
599 | case 8: | |
600 | term.c_cflag |= CS8; | |
601 | break; | |
602 | case 7: | |
603 | term.c_cflag |= CS7; | |
604 | break; | |
605 | default: | |
606 | return SP_ERR_ARG; | |
607 | } | |
608 | ||
609 | term.c_cflag &= ~CSTOPB; | |
610 | switch (stopbits) { | |
611 | case 1: | |
612 | term.c_cflag &= ~CSTOPB; | |
613 | break; | |
614 | case 2: | |
615 | term.c_cflag |= CSTOPB; | |
616 | break; | |
617 | default: | |
618 | return SP_ERR_ARG; | |
619 | } | |
620 | ||
621 | term.c_iflag &= ~(IXON | IXOFF); | |
622 | term.c_cflag &= ~CRTSCTS; | |
623 | switch (flowcontrol) { | |
624 | case 0: | |
625 | /* No flow control. */ | |
626 | break; | |
627 | case 1: | |
628 | term.c_cflag |= CRTSCTS; | |
629 | break; | |
630 | case 2: | |
631 | term.c_iflag |= IXON | IXOFF; | |
632 | break; | |
633 | default: | |
634 | return SP_ERR_ARG; | |
635 | } | |
636 | ||
637 | term.c_iflag &= ~IGNPAR; | |
638 | term.c_cflag &= ~(PARODD | PARENB); | |
639 | switch (parity) { | |
640 | case SP_PARITY_NONE: | |
641 | term.c_iflag |= IGNPAR; | |
642 | break; | |
643 | case SP_PARITY_EVEN: | |
644 | term.c_cflag |= PARENB; | |
645 | break; | |
646 | case SP_PARITY_ODD: | |
647 | term.c_cflag |= PARENB | PARODD; | |
648 | break; | |
649 | default: | |
650 | return SP_ERR_ARG; | |
651 | } | |
652 | ||
653 | /* Turn off all serial port cooking. */ | |
654 | term.c_iflag &= ~(ISTRIP | INLCR | ICRNL); | |
655 | term.c_oflag &= ~(ONLCR | OCRNL | ONOCR); | |
656 | #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) | |
657 | term.c_oflag &= ~OFILL; | |
658 | #endif | |
659 | ||
660 | /* Disable canonical mode, and don't echo input characters. */ | |
661 | term.c_lflag &= ~(ICANON | ECHO); | |
662 | ||
663 | /* Write the configured settings. */ | |
664 | if (tcsetattr(port->fd, TCSADRAIN, &term) < 0) | |
665 | return SP_ERR_FAIL; | |
666 | ||
667 | if (rts != -1) { | |
668 | controlbits = TIOCM_RTS; | |
669 | if (ioctl(port->fd, rts ? TIOCMBIS : TIOCMBIC, | |
670 | &controlbits) < 0) | |
671 | return SP_ERR_FAIL; | |
672 | } | |
673 | ||
674 | if (dtr != -1) { | |
675 | controlbits = TIOCM_DTR; | |
676 | if (ioctl(port->fd, dtr ? TIOCMBIS : TIOCMBIC, | |
677 | &controlbits) < 0) | |
678 | return SP_ERR_FAIL; | |
679 | } | |
680 | #endif | |
681 | ||
682 | return SP_OK; | |
683 | } | |
684 | ||
685 | /** | |
686 | * Get error code for failed operation. | |
687 | * | |
688 | * In order to obtain the correct result, this function should be called | |
689 | * straight after the failure, before executing any other system operations. | |
690 | * | |
691 | * @return The system's numeric code for the error that caused the last | |
692 | * operation to fail. | |
693 | */ | |
694 | int sp_last_error_code(void) | |
695 | { | |
696 | #ifdef _WIN32 | |
697 | return GetLastError(); | |
698 | #else | |
699 | return errno; | |
700 | #endif | |
701 | } | |
702 | ||
703 | /** | |
704 | * Get error message for failed operation. | |
705 | * | |
706 | * In order to obtain the correct result, this function should be called | |
707 | * straight after the failure, before executing other system operations. | |
708 | * | |
709 | * @return The system's message for the error that caused the last | |
710 | * operation to fail. This string may be allocated by the function, | |
711 | * and can be freed after use by calling sp_free_error_message. | |
712 | */ | |
713 | char *sp_last_error_message(void) | |
714 | { | |
715 | #ifdef _WIN32 | |
716 | LPVOID message; | |
717 | DWORD error = GetLastError(); | |
718 | ||
719 | FormatMessage( | |
720 | FORMAT_MESSAGE_ALLOCATE_BUFFER | | |
721 | FORMAT_MESSAGE_FROM_SYSTEM | | |
722 | FORMAT_MESSAGE_IGNORE_INSERTS, | |
723 | NULL, | |
724 | error, | |
725 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | |
726 | (LPTSTR) &message, | |
727 | 0, NULL ); | |
728 | ||
729 | return message; | |
730 | #else | |
731 | return strerror(errno); | |
732 | #endif | |
733 | } | |
734 | ||
735 | /** | |
736 | * Free error message. | |
737 | * | |
738 | * This function can be used to free a string returned by the | |
739 | * sp_last_error_message function. | |
740 | */ | |
741 | void sp_free_error_message(char *message) | |
742 | { | |
743 | #ifdef _WIN32 | |
744 | LocalFree(message); | |
64eec30d ML |
745 | #else |
746 | (void)message; | |
74510d4b ML |
747 | #endif |
748 | } |