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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; | |
08fe0bdb | 179 | struct udev_device *ud_dev, *ud_parent; |
3b63f34d ML |
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); | |
08fe0bdb ML |
193 | /* If there is no parent device, this is a virtual tty. */ |
194 | ud_parent = udev_device_get_parent(ud_dev); | |
195 | if (ud_parent == NULL) | |
196 | { | |
197 | udev_device_unref(ud_dev); | |
198 | continue; | |
199 | } | |
3b63f34d ML |
200 | name = udev_device_get_devnode(ud_dev); |
201 | list = sp_list_append(list, (void *)name, strlen(name) + 1); | |
202 | udev_device_unref(ud_dev); | |
203 | if (!list) | |
204 | goto out; | |
205 | } | |
206 | out: | |
207 | udev_enumerate_unref(ud_enumerate); | |
208 | udev_unref(ud); | |
209 | return list; | |
210 | #endif | |
211 | } | |
212 | ||
68ab64cc ML |
213 | /** |
214 | * Free a port list returned by sp_list_ports. | |
215 | */ | |
3b63f34d ML |
216 | void sp_free_port_list(char **list) |
217 | { | |
218 | unsigned int i; | |
219 | for (i = 0; list[i]; i++) | |
220 | free(list[i]); | |
221 | free(list); | |
222 | } | |
223 | ||
74510d4b ML |
224 | static int sp_validate_port(struct sp_port *port) |
225 | { | |
226 | if (port == NULL) | |
227 | return 0; | |
228 | #ifdef _WIN32 | |
229 | if (port->hdl == INVALID_HANDLE_VALUE) | |
230 | return 0; | |
231 | #else | |
232 | if (port->fd < 0) | |
233 | return 0; | |
234 | #endif | |
235 | return 1; | |
236 | } | |
237 | ||
238 | #define CHECK_PORT() do { if (!sp_validate_port(port)) return SP_ERR_ARG; } while (0) | |
239 | ||
240 | /** | |
241 | * Open the specified serial port. | |
242 | * | |
243 | * @param port Pointer to empty port structure allocated by caller. | |
244 | * @param portname Name of port to open. | |
245 | * @param flags Flags to use when opening the serial port. Possible flags | |
246 | * are: SP_MODE_RDWR, SP_MODE_RDONLY, SP_MODE_NONBLOCK. | |
247 | * | |
248 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
249 | * or SP_ERR_ARG if an invalid port or name is passed. | |
250 | */ | |
251 | int sp_open(struct sp_port *port, char *portname, int flags) | |
252 | { | |
253 | if (!port) | |
254 | return SP_ERR_ARG; | |
255 | ||
256 | if (!portname) | |
257 | return SP_ERR_ARG; | |
258 | ||
259 | port->name = portname; | |
260 | ||
261 | #ifdef _WIN32 | |
262 | DWORD desired_access = 0, flags_and_attributes = 0; | |
263 | /* Map 'flags' to the OS-specific settings. */ | |
264 | desired_access |= GENERIC_READ; | |
265 | flags_and_attributes = FILE_ATTRIBUTE_NORMAL; | |
266 | if (flags & SP_MODE_RDWR) | |
267 | desired_access |= GENERIC_WRITE; | |
268 | if (flags & SP_MODE_NONBLOCK) | |
269 | flags_and_attributes |= FILE_FLAG_OVERLAPPED; | |
270 | ||
271 | port->hdl = CreateFile(port->name, desired_access, 0, 0, | |
272 | OPEN_EXISTING, flags_and_attributes, 0); | |
273 | if (port->hdl == INVALID_HANDLE_VALUE) | |
274 | return SP_ERR_FAIL; | |
275 | #else | |
276 | int flags_local = 0; | |
277 | /* Map 'flags' to the OS-specific settings. */ | |
278 | if (flags & SP_MODE_RDWR) | |
279 | flags_local |= O_RDWR; | |
280 | if (flags & SP_MODE_RDONLY) | |
281 | flags_local |= O_RDONLY; | |
282 | if (flags & SP_MODE_NONBLOCK) | |
283 | flags_local |= O_NONBLOCK; | |
284 | ||
285 | if ((port->fd = open(port->name, flags_local)) < 0) | |
286 | return SP_ERR_FAIL; | |
287 | #endif | |
288 | ||
289 | return SP_OK; | |
290 | } | |
291 | ||
292 | /** | |
293 | * Close the specified serial port. | |
294 | * | |
295 | * @param port Pointer to port structure. | |
296 | * | |
297 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
298 | * or SP_ERR_ARG if an invalid port is passed. | |
299 | */ | |
300 | int sp_close(struct sp_port *port) | |
301 | { | |
302 | CHECK_PORT(); | |
303 | ||
304 | #ifdef _WIN32 | |
305 | /* Returns non-zero upon success, 0 upon failure. */ | |
306 | if (CloseHandle(port->hdl) == 0) | |
307 | return SP_ERR_FAIL; | |
308 | #else | |
309 | /* Returns 0 upon success, -1 upon failure. */ | |
310 | if (close(port->fd) == -1) | |
311 | return SP_ERR_FAIL; | |
312 | #endif | |
313 | ||
314 | return SP_OK; | |
315 | } | |
316 | ||
317 | /** | |
318 | * Flush serial port buffers. | |
319 | * | |
320 | * @param port Pointer to port structure. | |
321 | * | |
322 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
323 | * or SP_ERR_ARG if an invalid port is passed. | |
324 | */ | |
325 | int sp_flush(struct sp_port *port) | |
326 | { | |
327 | CHECK_PORT(); | |
328 | ||
329 | #ifdef _WIN32 | |
330 | /* Returns non-zero upon success, 0 upon failure. */ | |
331 | if (PurgeComm(port->hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0) | |
332 | return SP_ERR_FAIL; | |
333 | #else | |
334 | /* Returns 0 upon success, -1 upon failure. */ | |
335 | if (tcflush(port->fd, TCIOFLUSH) < 0) | |
336 | return SP_ERR_FAIL; | |
337 | #endif | |
338 | return SP_OK; | |
339 | } | |
340 | ||
341 | /** | |
342 | * Write a number of bytes to the specified serial port. | |
343 | * | |
344 | * @param port Pointer to port structure. | |
345 | * @param buf Buffer containing the bytes to write. | |
346 | * @param count Number of bytes to write. | |
347 | * | |
348 | * @return The number of bytes written, SP_ERR_FAIL on failure, | |
349 | * or SP_ERR_ARG if an invalid port is passed. | |
350 | */ | |
351 | int sp_write(struct sp_port *port, const void *buf, size_t count) | |
352 | { | |
353 | CHECK_PORT(); | |
354 | ||
355 | if (!buf) | |
356 | return SP_ERR_ARG; | |
357 | ||
358 | #ifdef _WIN32 | |
359 | DWORD written = 0; | |
360 | /* Returns non-zero upon success, 0 upon failure. */ | |
361 | if (WriteFile(port->hdl, buf, count, &written, NULL) == 0) | |
362 | return SP_ERR_FAIL; | |
363 | return written; | |
364 | #else | |
365 | /* Returns the number of bytes written, or -1 upon failure. */ | |
366 | ssize_t written = write(port->fd, buf, count); | |
367 | if (written < 0) | |
368 | return SP_ERR_FAIL; | |
369 | else | |
370 | return written;; | |
371 | #endif | |
372 | } | |
373 | ||
374 | /** | |
375 | * Read a number of bytes from the specified serial port. | |
376 | * | |
377 | * @param port Pointer to port structure. | |
378 | * @param buf Buffer where to store the bytes that are read. | |
379 | * @param count The number of bytes to read. | |
380 | * | |
381 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
382 | * or SP_ERR_ARG if an invalid port is passed. | |
383 | */ | |
384 | int sp_read(struct sp_port *port, void *buf, size_t count) | |
385 | { | |
386 | CHECK_PORT(); | |
387 | ||
388 | if (!buf) | |
389 | return SP_ERR_ARG; | |
390 | ||
391 | #ifdef _WIN32 | |
392 | DWORD bytes_read = 0; | |
393 | /* Returns non-zero upon success, 0 upon failure. */ | |
394 | if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0) | |
395 | return SP_ERR_FAIL; | |
396 | return bytes_read; | |
397 | #else | |
398 | ssize_t bytes_read; | |
399 | /* Returns the number of bytes read, or -1 upon failure. */ | |
400 | if ((bytes_read = read(port->fd, buf, count)) < 0) | |
401 | return SP_ERR_FAIL; | |
402 | return bytes_read; | |
403 | #endif | |
404 | } | |
405 | ||
406 | /** | |
407 | * Set serial parameters for the specified serial port. | |
408 | * | |
409 | * @param port Pointer to port structure. | |
410 | * @param baudrate The baudrate to set. | |
411 | * @param bits The number of data bits to use. | |
412 | * @param parity The parity setting to use (0 = none, 1 = even, 2 = odd). | |
413 | * @param stopbits The number of stop bits to use (1 or 2). | |
414 | * @param flowcontrol The flow control settings to use (0 = none, 1 = RTS/CTS, | |
415 | * 2 = XON/XOFF). | |
416 | * | |
417 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
418 | * or SP_ERR_ARG if an invalid argument is passed. | |
419 | */ | |
420 | int sp_set_params(struct sp_port *port, int baudrate, | |
421 | int bits, int parity, int stopbits, | |
422 | int flowcontrol, int rts, int dtr) | |
423 | { | |
424 | CHECK_PORT(); | |
425 | ||
426 | #ifdef _WIN32 | |
427 | DCB dcb; | |
428 | ||
429 | if (!GetCommState(port->hdl, &dcb)) | |
430 | return SP_ERR_FAIL; | |
431 | ||
432 | switch (baudrate) { | |
433 | /* | |
434 | * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to | |
435 | * have documented CBR_* macros. | |
436 | */ | |
437 | case 110: | |
438 | dcb.BaudRate = CBR_110; | |
439 | break; | |
440 | case 300: | |
441 | dcb.BaudRate = CBR_300; | |
442 | break; | |
443 | case 600: | |
444 | dcb.BaudRate = CBR_600; | |
445 | break; | |
446 | case 1200: | |
447 | dcb.BaudRate = CBR_1200; | |
448 | break; | |
449 | case 2400: | |
450 | dcb.BaudRate = CBR_2400; | |
451 | break; | |
452 | case 4800: | |
453 | dcb.BaudRate = CBR_4800; | |
454 | break; | |
455 | case 9600: | |
456 | dcb.BaudRate = CBR_9600; | |
457 | break; | |
458 | case 14400: | |
459 | dcb.BaudRate = CBR_14400; /* Not available on Unix? */ | |
460 | break; | |
461 | case 19200: | |
462 | dcb.BaudRate = CBR_19200; | |
463 | break; | |
464 | case 38400: | |
465 | dcb.BaudRate = CBR_38400; | |
466 | break; | |
467 | case 57600: | |
468 | dcb.BaudRate = CBR_57600; | |
469 | break; | |
470 | case 115200: | |
471 | dcb.BaudRate = CBR_115200; | |
472 | break; | |
473 | case 128000: | |
474 | dcb.BaudRate = CBR_128000; /* Not available on Unix? */ | |
475 | break; | |
476 | case 256000: | |
477 | dcb.BaudRate = CBR_256000; /* Not available on Unix? */ | |
478 | break; | |
479 | default: | |
480 | return SP_ERR_ARG; | |
481 | } | |
482 | ||
483 | switch (stopbits) { | |
484 | /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */ | |
485 | case 1: | |
486 | dcb.StopBits = ONESTOPBIT; | |
487 | break; | |
488 | case 2: | |
489 | dcb.StopBits = TWOSTOPBITS; | |
490 | break; | |
491 | default: | |
492 | return SP_ERR_ARG; | |
493 | } | |
494 | ||
495 | switch (parity) { | |
496 | /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */ | |
497 | case SP_PARITY_NONE: | |
498 | dcb.Parity = NOPARITY; | |
499 | break; | |
500 | case SP_PARITY_EVEN: | |
501 | dcb.Parity = EVENPARITY; | |
502 | break; | |
503 | case SP_PARITY_ODD: | |
504 | dcb.Parity = ODDPARITY; | |
505 | break; | |
506 | default: | |
507 | return SP_ERR_ARG; | |
508 | } | |
509 | ||
510 | if (rts != -1) { | |
511 | if (rts) | |
512 | dcb.fRtsControl = RTS_CONTROL_ENABLE; | |
513 | else | |
514 | dcb.fRtsControl = RTS_CONTROL_DISABLE; | |
515 | } | |
516 | ||
517 | if (dtr != -1) { | |
518 | if (dtr) | |
519 | dcb.fDtrControl = DTR_CONTROL_ENABLE; | |
520 | else | |
521 | dcb.fDtrControl = DTR_CONTROL_DISABLE; | |
522 | } | |
523 | ||
524 | if (!SetCommState(port->hdl, &dcb)) | |
525 | return SP_ERR_FAIL; | |
526 | #else | |
527 | struct termios term; | |
528 | speed_t baud; | |
529 | int controlbits; | |
530 | ||
531 | if (tcgetattr(port->fd, &term) < 0) | |
532 | return SP_ERR_FAIL; | |
533 | ||
534 | switch (baudrate) { | |
535 | case 50: | |
536 | baud = B50; | |
537 | break; | |
538 | case 75: | |
539 | baud = B75; | |
540 | break; | |
541 | case 110: | |
542 | baud = B110; | |
543 | break; | |
544 | case 134: | |
545 | baud = B134; | |
546 | break; | |
547 | case 150: | |
548 | baud = B150; | |
549 | break; | |
550 | case 200: | |
551 | baud = B200; | |
552 | break; | |
553 | case 300: | |
554 | baud = B300; | |
555 | break; | |
556 | case 600: | |
557 | baud = B600; | |
558 | break; | |
559 | case 1200: | |
560 | baud = B1200; | |
561 | break; | |
562 | case 1800: | |
563 | baud = B1800; | |
564 | break; | |
565 | case 2400: | |
566 | baud = B2400; | |
567 | break; | |
568 | case 4800: | |
569 | baud = B4800; | |
570 | break; | |
571 | case 9600: | |
572 | baud = B9600; | |
573 | break; | |
574 | case 19200: | |
575 | baud = B19200; | |
576 | break; | |
577 | case 38400: | |
578 | baud = B38400; | |
579 | break; | |
580 | case 57600: | |
581 | baud = B57600; | |
582 | break; | |
583 | case 115200: | |
584 | baud = B115200; | |
585 | break; | |
586 | case 230400: | |
587 | baud = B230400; | |
588 | break; | |
589 | #if !defined(__APPLE__) && !defined(__OpenBSD__) | |
590 | case 460800: | |
591 | baud = B460800; | |
592 | break; | |
593 | #endif | |
594 | default: | |
595 | return SP_ERR_ARG; | |
596 | } | |
597 | ||
598 | if (cfsetospeed(&term, baud) < 0) | |
599 | return SP_ERR_FAIL; | |
600 | ||
601 | if (cfsetispeed(&term, baud) < 0) | |
602 | return SP_ERR_FAIL; | |
603 | ||
604 | term.c_cflag &= ~CSIZE; | |
605 | switch (bits) { | |
606 | case 8: | |
607 | term.c_cflag |= CS8; | |
608 | break; | |
609 | case 7: | |
610 | term.c_cflag |= CS7; | |
611 | break; | |
612 | default: | |
613 | return SP_ERR_ARG; | |
614 | } | |
615 | ||
616 | term.c_cflag &= ~CSTOPB; | |
617 | switch (stopbits) { | |
618 | case 1: | |
619 | term.c_cflag &= ~CSTOPB; | |
620 | break; | |
621 | case 2: | |
622 | term.c_cflag |= CSTOPB; | |
623 | break; | |
624 | default: | |
625 | return SP_ERR_ARG; | |
626 | } | |
627 | ||
8683177b | 628 | term.c_iflag &= ~(IXON | IXOFF | IXANY); |
74510d4b ML |
629 | term.c_cflag &= ~CRTSCTS; |
630 | switch (flowcontrol) { | |
631 | case 0: | |
632 | /* No flow control. */ | |
633 | break; | |
634 | case 1: | |
635 | term.c_cflag |= CRTSCTS; | |
636 | break; | |
637 | case 2: | |
8683177b | 638 | term.c_iflag |= IXON | IXOFF | IXANY; |
74510d4b ML |
639 | break; |
640 | default: | |
641 | return SP_ERR_ARG; | |
642 | } | |
643 | ||
644 | term.c_iflag &= ~IGNPAR; | |
8683177b | 645 | term.c_cflag &= ~(PARENB | PARODD); |
74510d4b ML |
646 | switch (parity) { |
647 | case SP_PARITY_NONE: | |
648 | term.c_iflag |= IGNPAR; | |
649 | break; | |
650 | case SP_PARITY_EVEN: | |
651 | term.c_cflag |= PARENB; | |
652 | break; | |
653 | case SP_PARITY_ODD: | |
654 | term.c_cflag |= PARENB | PARODD; | |
655 | break; | |
656 | default: | |
657 | return SP_ERR_ARG; | |
658 | } | |
659 | ||
660 | /* Turn off all serial port cooking. */ | |
661 | term.c_iflag &= ~(ISTRIP | INLCR | ICRNL); | |
662 | term.c_oflag &= ~(ONLCR | OCRNL | ONOCR); | |
663 | #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) | |
664 | term.c_oflag &= ~OFILL; | |
665 | #endif | |
666 | ||
667 | /* Disable canonical mode, and don't echo input characters. */ | |
668 | term.c_lflag &= ~(ICANON | ECHO); | |
669 | ||
8683177b ML |
670 | /* Ignore modem status lines; enable receiver */ |
671 | term.c_cflag |= (CLOCAL | CREAD); | |
672 | ||
74510d4b ML |
673 | /* Write the configured settings. */ |
674 | if (tcsetattr(port->fd, TCSADRAIN, &term) < 0) | |
675 | return SP_ERR_FAIL; | |
676 | ||
677 | if (rts != -1) { | |
678 | controlbits = TIOCM_RTS; | |
679 | if (ioctl(port->fd, rts ? TIOCMBIS : TIOCMBIC, | |
680 | &controlbits) < 0) | |
681 | return SP_ERR_FAIL; | |
682 | } | |
683 | ||
684 | if (dtr != -1) { | |
685 | controlbits = TIOCM_DTR; | |
686 | if (ioctl(port->fd, dtr ? TIOCMBIS : TIOCMBIC, | |
687 | &controlbits) < 0) | |
688 | return SP_ERR_FAIL; | |
689 | } | |
690 | #endif | |
691 | ||
692 | return SP_OK; | |
693 | } | |
694 | ||
695 | /** | |
696 | * Get error code for failed operation. | |
697 | * | |
698 | * In order to obtain the correct result, this function should be called | |
699 | * straight after the failure, before executing any other system operations. | |
700 | * | |
701 | * @return The system's numeric code for the error that caused the last | |
702 | * operation to fail. | |
703 | */ | |
704 | int sp_last_error_code(void) | |
705 | { | |
706 | #ifdef _WIN32 | |
707 | return GetLastError(); | |
708 | #else | |
709 | return errno; | |
710 | #endif | |
711 | } | |
712 | ||
713 | /** | |
714 | * Get error message for failed operation. | |
715 | * | |
716 | * In order to obtain the correct result, this function should be called | |
717 | * straight after the failure, before executing other system operations. | |
718 | * | |
719 | * @return The system's message for the error that caused the last | |
720 | * operation to fail. This string may be allocated by the function, | |
721 | * and can be freed after use by calling sp_free_error_message. | |
722 | */ | |
723 | char *sp_last_error_message(void) | |
724 | { | |
725 | #ifdef _WIN32 | |
726 | LPVOID message; | |
727 | DWORD error = GetLastError(); | |
728 | ||
729 | FormatMessage( | |
730 | FORMAT_MESSAGE_ALLOCATE_BUFFER | | |
731 | FORMAT_MESSAGE_FROM_SYSTEM | | |
732 | FORMAT_MESSAGE_IGNORE_INSERTS, | |
733 | NULL, | |
734 | error, | |
735 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | |
736 | (LPTSTR) &message, | |
737 | 0, NULL ); | |
738 | ||
739 | return message; | |
740 | #else | |
741 | return strerror(errno); | |
742 | #endif | |
743 | } | |
744 | ||
745 | /** | |
746 | * Free error message. | |
747 | * | |
748 | * This function can be used to free a string returned by the | |
749 | * sp_last_error_message function. | |
750 | */ | |
751 | void sp_free_error_message(char *message) | |
752 | { | |
753 | #ifdef _WIN32 | |
754 | LocalFree(message); | |
64eec30d ML |
755 | #else |
756 | (void)message; | |
74510d4b ML |
757 | #endif |
758 | } |