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