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1 | /* | |
2 | * "$Id: parallel.c 6649 2007-07-11 21:46:42Z mike $" | |
3 | * | |
4 | * Parallel port backend for the Common UNIX Printing System (CUPS). | |
5 | * | |
6 | * Copyright 2007 by Apple Inc. | |
7 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. | |
8 | * | |
9 | * These coded instructions, statements, and computer programs are the | |
10 | * property of Apple Inc. and are protected by Federal copyright | |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * "LICENSE" which should have been included with this file. If this | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
14 | * | |
15 | * This file is subject to the Apple OS-Developed Software exception. | |
16 | * | |
17 | * Contents: | |
18 | * | |
19 | * main() - Send a file to the specified parallel port. | |
20 | * list_devices() - List all parallel devices. | |
21 | * side_cb() - Handle side-channel requests... | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Include necessary headers. | |
26 | */ | |
27 | ||
28 | #include "backend-private.h" | |
29 | ||
30 | #ifdef __hpux | |
31 | # include <sys/time.h> | |
32 | #else | |
33 | # include <sys/select.h> | |
34 | #endif /* __hpux */ | |
35 | ||
36 | #ifdef WIN32 | |
37 | # include <io.h> | |
38 | #else | |
39 | # include <unistd.h> | |
40 | # include <fcntl.h> | |
41 | # include <termios.h> | |
42 | # include <sys/socket.h> | |
43 | #endif /* WIN32 */ | |
44 | ||
45 | #ifdef __sgi | |
46 | # include <invent.h> | |
47 | # ifndef INV_EPP_ECP_PLP | |
48 | # define INV_EPP_ECP_PLP 6 /* From 6.3/6.4/6.5 sys/invent.h */ | |
49 | # define INV_ASO_SERIAL 14 /* serial portion of SGI ASO board */ | |
50 | # define INV_IOC3_DMA 16 /* DMA mode IOC3 serial */ | |
51 | # define INV_IOC3_PIO 17 /* PIO mode IOC3 serial */ | |
52 | # define INV_ISA_DMA 19 /* DMA mode ISA serial -- O2 */ | |
53 | # endif /* !INV_EPP_ECP_PLP */ | |
54 | #endif /* __sgi */ | |
55 | ||
56 | ||
57 | /* | |
58 | * Local functions... | |
59 | */ | |
60 | ||
61 | static void list_devices(void); | |
62 | static void side_cb(int print_fd, int device_fd, int use_bc); | |
63 | ||
64 | ||
65 | /* | |
66 | * 'main()' - Send a file to the specified parallel port. | |
67 | * | |
68 | * Usage: | |
69 | * | |
70 | * printer-uri job-id user title copies options [file] | |
71 | */ | |
72 | ||
73 | int /* O - Exit status */ | |
74 | main(int argc, /* I - Number of command-line arguments (6 or 7) */ | |
75 | char *argv[]) /* I - Command-line arguments */ | |
76 | { | |
77 | char method[255], /* Method in URI */ | |
78 | hostname[1024], /* Hostname */ | |
79 | username[255], /* Username info (not used) */ | |
80 | resource[1024], /* Resource info (device and options) */ | |
81 | *options; /* Pointer to options */ | |
82 | int port; /* Port number (not used) */ | |
83 | int print_fd, /* Print file */ | |
84 | device_fd, /* Parallel device */ | |
85 | use_bc; /* Read back-channel data? */ | |
86 | int copies; /* Number of copies to print */ | |
87 | size_t tbytes; /* Total number of bytes written */ | |
88 | struct termios opts; /* Parallel port options */ | |
89 | #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET) | |
90 | struct sigaction action; /* Actions for POSIX signals */ | |
91 | #endif /* HAVE_SIGACTION && !HAVE_SIGSET */ | |
92 | ||
93 | ||
94 | /* | |
95 | * Make sure status messages are not buffered... | |
96 | */ | |
97 | ||
98 | setbuf(stderr, NULL); | |
99 | ||
100 | /* | |
101 | * Ignore SIGPIPE signals... | |
102 | */ | |
103 | ||
104 | #ifdef HAVE_SIGSET | |
105 | sigset(SIGPIPE, SIG_IGN); | |
106 | #elif defined(HAVE_SIGACTION) | |
107 | memset(&action, 0, sizeof(action)); | |
108 | action.sa_handler = SIG_IGN; | |
109 | sigaction(SIGPIPE, &action, NULL); | |
110 | #else | |
111 | signal(SIGPIPE, SIG_IGN); | |
112 | #endif /* HAVE_SIGSET */ | |
113 | ||
114 | /* | |
115 | * Check command-line... | |
116 | */ | |
117 | ||
118 | if (argc == 1) | |
119 | { | |
120 | list_devices(); | |
121 | return (CUPS_BACKEND_OK); | |
122 | } | |
123 | else if (argc < 6 || argc > 7) | |
124 | { | |
125 | fprintf(stderr, _("Usage: %s job-id user title copies options [file]\n"), | |
126 | argv[0]); | |
127 | return (CUPS_BACKEND_FAILED); | |
128 | } | |
129 | ||
130 | /* | |
131 | * If we have 7 arguments, print the file named on the command-line. | |
132 | * Otherwise, send stdin instead... | |
133 | */ | |
134 | ||
135 | if (argc == 6) | |
136 | { | |
137 | print_fd = 0; | |
138 | copies = 1; | |
139 | } | |
140 | else | |
141 | { | |
142 | /* | |
143 | * Try to open the print file... | |
144 | */ | |
145 | ||
146 | if ((print_fd = open(argv[6], O_RDONLY)) < 0) | |
147 | { | |
148 | perror("ERROR: unable to open print file"); | |
149 | return (CUPS_BACKEND_FAILED); | |
150 | } | |
151 | ||
152 | copies = atoi(argv[4]); | |
153 | } | |
154 | ||
155 | /* | |
156 | * Extract the device name and options from the URI... | |
157 | */ | |
158 | ||
159 | httpSeparateURI(HTTP_URI_CODING_ALL, cupsBackendDeviceURI(argv), | |
160 | method, sizeof(method), username, sizeof(username), | |
161 | hostname, sizeof(hostname), &port, | |
162 | resource, sizeof(resource)); | |
163 | ||
164 | /* | |
165 | * See if there are any options... | |
166 | */ | |
167 | ||
168 | if ((options = strchr(resource, '?')) != NULL) | |
169 | { | |
170 | /* | |
171 | * Yup, terminate the device name string and move to the first | |
172 | * character of the options... | |
173 | */ | |
174 | ||
175 | *options++ = '\0'; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Open the parallel port device... | |
180 | */ | |
181 | ||
182 | fputs("STATE: +connecting-to-device\n", stderr); | |
183 | ||
184 | do | |
185 | { | |
186 | #if defined(__linux) || defined(__FreeBSD__) | |
187 | /* | |
188 | * The Linux and FreeBSD parallel port drivers currently are broken WRT | |
189 | * select() and bidirection I/O... | |
190 | */ | |
191 | ||
192 | device_fd = open(resource, O_WRONLY | O_EXCL); | |
193 | use_bc = 0; | |
194 | ||
195 | #else | |
196 | if ((device_fd = open(resource, O_RDWR | O_EXCL)) < 0) | |
197 | { | |
198 | device_fd = open(resource, O_WRONLY | O_EXCL); | |
199 | use_bc = 0; | |
200 | } | |
201 | else | |
202 | use_bc = 1; | |
203 | #endif /* __linux || __FreeBSD__ */ | |
204 | ||
205 | if (device_fd == -1) | |
206 | { | |
207 | if (getenv("CLASS") != NULL) | |
208 | { | |
209 | /* | |
210 | * If the CLASS environment variable is set, the job was submitted | |
211 | * to a class and not to a specific queue. In this case, we want | |
212 | * to abort immediately so that the job can be requeued on the next | |
213 | * available printer in the class. | |
214 | */ | |
215 | ||
216 | fputs(_("INFO: Unable to contact printer, queuing on next " | |
217 | "printer in class...\n"), stderr); | |
218 | ||
219 | /* | |
220 | * Sleep 5 seconds to keep the job from requeuing too rapidly... | |
221 | */ | |
222 | ||
223 | sleep(5); | |
224 | ||
225 | return (CUPS_BACKEND_FAILED); | |
226 | } | |
227 | ||
228 | if (errno == EBUSY) | |
229 | { | |
230 | fputs(_("INFO: Printer busy; will retry in 30 seconds...\n"), stderr); | |
231 | sleep(30); | |
232 | } | |
233 | else if (errno == ENXIO || errno == EIO || errno == ENOENT) | |
234 | { | |
235 | fputs(_("INFO: Printer not connected; will retry in 30 seconds...\n"), | |
236 | stderr); | |
237 | sleep(30); | |
238 | } | |
239 | else | |
240 | { | |
241 | fprintf(stderr, _("ERROR: Unable to open device file \"%s\": %s\n"), | |
242 | resource, strerror(errno)); | |
243 | return (CUPS_BACKEND_FAILED); | |
244 | } | |
245 | } | |
246 | } | |
247 | while (device_fd < 0); | |
248 | ||
249 | fputs("STATE: -connecting-to-device\n", stderr); | |
250 | ||
251 | /* | |
252 | * Set any options provided... | |
253 | */ | |
254 | ||
255 | tcgetattr(device_fd, &opts); | |
256 | ||
257 | opts.c_lflag &= ~(ICANON | ECHO | ISIG); /* Raw mode */ | |
258 | ||
259 | /**** No options supported yet ****/ | |
260 | ||
261 | tcsetattr(device_fd, TCSANOW, &opts); | |
262 | ||
263 | /* | |
264 | * Finally, send the print file... | |
265 | */ | |
266 | ||
267 | tbytes = 0; | |
268 | ||
269 | while (copies > 0 && tbytes >= 0) | |
270 | { | |
271 | copies --; | |
272 | ||
273 | if (print_fd != 0) | |
274 | { | |
275 | fputs("PAGE: 1 1\n", stderr); | |
276 | lseek(print_fd, 0, SEEK_SET); | |
277 | } | |
278 | ||
279 | tbytes = backendRunLoop(print_fd, device_fd, use_bc, side_cb); | |
280 | ||
281 | if (print_fd != 0 && tbytes >= 0) | |
282 | fprintf(stderr, | |
283 | #ifdef HAVE_LONG_LONG | |
284 | _("INFO: Sent print file, %lld bytes...\n"), | |
285 | #else | |
286 | _("INFO: Sent print file, %ld bytes...\n"), | |
287 | #endif /* HAVE_LONG_LONG */ | |
288 | CUPS_LLCAST tbytes); | |
289 | } | |
290 | ||
291 | /* | |
292 | * Close the socket connection and input file and return... | |
293 | */ | |
294 | ||
295 | close(device_fd); | |
296 | ||
297 | if (print_fd != 0) | |
298 | close(print_fd); | |
299 | ||
300 | return (tbytes < 0 ? CUPS_BACKEND_FAILED : CUPS_BACKEND_OK); | |
301 | } | |
302 | ||
303 | ||
304 | /* | |
305 | * 'list_devices()' - List all parallel devices. | |
306 | */ | |
307 | ||
308 | static void | |
309 | list_devices(void) | |
310 | { | |
311 | #if defined(__hpux) || defined(__sgi) || defined(__sun) | |
312 | static char *funky_hex = "0123456789abcdefghijklmnopqrstuvwxyz"; | |
313 | /* Funky hex numbering used for some devices */ | |
314 | #endif /* __hpux || __sgi || __sun */ | |
315 | ||
316 | #ifdef __linux | |
317 | int i; /* Looping var */ | |
318 | int fd; /* File descriptor */ | |
319 | char device[255], /* Device filename */ | |
320 | basedevice[255], /* Base device filename for ports */ | |
321 | device_id[1024], /* Device ID string */ | |
322 | make_model[1024]; /* Make and model */ | |
323 | ||
324 | ||
325 | if (!access("/dev/parallel/", 0)) | |
326 | strcpy(basedevice, "/dev/parallel/"); | |
327 | else if (!access("/dev/printers/", 0)) | |
328 | strcpy(basedevice, "/dev/printers/"); | |
329 | else | |
330 | strcpy(basedevice, "/dev/lp"); | |
331 | ||
332 | for (i = 0; i < 4; i ++) | |
333 | { | |
334 | /* | |
335 | * Open the port, if available... | |
336 | */ | |
337 | ||
338 | sprintf(device, "%s%d", basedevice, i); | |
339 | if ((fd = open(device, O_RDWR | O_EXCL)) < 0) | |
340 | fd = open(device, O_WRONLY); | |
341 | ||
342 | if (fd >= 0) | |
343 | { | |
344 | /* | |
345 | * Now grab the IEEE 1284 device ID string... | |
346 | */ | |
347 | ||
348 | if (!backendGetDeviceID(fd, device_id, sizeof(device_id), | |
349 | make_model, sizeof(make_model), | |
350 | NULL, NULL, 0)) | |
351 | printf("direct parallel:%s \"%s\" \"%s LPT #%d\" \"%s\"\n", device, | |
352 | make_model, make_model, i + 1, device_id); | |
353 | else | |
354 | printf("direct parallel:%s \"Unknown\" \"LPT #%d\"\n", device, i + 1); | |
355 | ||
356 | close(fd); | |
357 | } | |
358 | } | |
359 | #elif defined(__sgi) | |
360 | int i, j, n; /* Looping vars */ | |
361 | char device[255]; /* Device filename */ | |
362 | inventory_t *inv; /* Hardware inventory info */ | |
363 | ||
364 | ||
365 | /* | |
366 | * IRIX maintains a hardware inventory of most devices... | |
367 | */ | |
368 | ||
369 | setinvent(); | |
370 | ||
371 | while ((inv = getinvent()) != NULL) | |
372 | { | |
373 | if (inv->inv_class == INV_PARALLEL && | |
374 | (inv->inv_type == INV_ONBOARD_PLP || | |
375 | inv->inv_type == INV_EPP_ECP_PLP)) | |
376 | { | |
377 | /* | |
378 | * Standard parallel port... | |
379 | */ | |
380 | ||
381 | puts("direct parallel:/dev/plp \"Unknown\" \"Onboard Parallel Port\""); | |
382 | } | |
383 | else if (inv->inv_class == INV_PARALLEL && | |
384 | inv->inv_type == INV_EPC_PLP) | |
385 | { | |
386 | /* | |
387 | * EPC parallel port... | |
388 | */ | |
389 | ||
390 | printf("direct parallel:/dev/plp%d \"Unknown\" \"Integral EPC parallel port, Ebus slot %d\"\n", | |
391 | inv->inv_controller, inv->inv_controller); | |
392 | } | |
393 | } | |
394 | ||
395 | endinvent(); | |
396 | ||
397 | /* | |
398 | * Central Data makes serial and parallel "servers" that can be | |
399 | * connected in a number of ways. Look for ports... | |
400 | */ | |
401 | ||
402 | for (i = 0; i < 10; i ++) | |
403 | for (j = 0; j < 8; j ++) | |
404 | for (n = 0; n < 32; n ++) | |
405 | { | |
406 | if (i == 8) /* EtherLite */ | |
407 | sprintf(device, "/dev/lpn%d%c", j, funky_hex[n]); | |
408 | else if (i == 9) /* PCI */ | |
409 | sprintf(device, "/dev/lpp%d%c", j, funky_hex[n]); | |
410 | else /* SCSI */ | |
411 | sprintf(device, "/dev/lp%d%d%c", i, j, funky_hex[n]); | |
412 | ||
413 | if (access(device, 0) == 0) | |
414 | { | |
415 | if (i == 8) | |
416 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
417 | device, j, n); | |
418 | else if (i == 9) | |
419 | printf("direct parallel:%s \"Unknown\" \"Central Data PCI Parallel Port, ID %d, port %d\"\n", | |
420 | device, j, n); | |
421 | else | |
422 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
423 | device, i, j, n); | |
424 | } | |
425 | } | |
426 | #elif defined(__sun) | |
427 | int i, j, n; /* Looping vars */ | |
428 | char device[255]; /* Device filename */ | |
429 | ||
430 | ||
431 | /* | |
432 | * Standard parallel ports... | |
433 | */ | |
434 | ||
435 | for (i = 0; i < 10; i ++) | |
436 | { | |
437 | sprintf(device, "/dev/ecpp%d", i); | |
438 | if (access(device, 0) == 0) | |
439 | printf("direct parallel:%s \"Unknown\" \"Sun IEEE-1284 Parallel Port #%d\"\n", | |
440 | device, i + 1); | |
441 | } | |
442 | ||
443 | for (i = 0; i < 10; i ++) | |
444 | { | |
445 | sprintf(device, "/dev/bpp%d", i); | |
446 | if (access(device, 0) == 0) | |
447 | printf("direct parallel:%s \"Unknown\" \"Sun Standard Parallel Port #%d\"\n", | |
448 | device, i + 1); | |
449 | } | |
450 | ||
451 | for (i = 0; i < 3; i ++) | |
452 | { | |
453 | sprintf(device, "/dev/lp%d", i); | |
454 | ||
455 | if (access(device, 0) == 0) | |
456 | printf("direct parallel:%s \"Unknown\" \"PC Parallel Port #%d\"\n", | |
457 | device, i + 1); | |
458 | } | |
459 | ||
460 | /* | |
461 | * MAGMA parallel ports... | |
462 | */ | |
463 | ||
464 | for (i = 0; i < 40; i ++) | |
465 | { | |
466 | sprintf(device, "/dev/pm%02d", i); | |
467 | if (access(device, 0) == 0) | |
468 | printf("direct parallel:%s \"Unknown\" \"MAGMA Parallel Board #%d Port #%d\"\n", | |
469 | device, (i / 10) + 1, (i % 10) + 1); | |
470 | } | |
471 | ||
472 | /* | |
473 | * Central Data parallel ports... | |
474 | */ | |
475 | ||
476 | for (i = 0; i < 9; i ++) | |
477 | for (j = 0; j < 8; j ++) | |
478 | for (n = 0; n < 32; n ++) | |
479 | { | |
480 | if (i == 8) /* EtherLite */ | |
481 | sprintf(device, "/dev/sts/lpN%d%c", j, funky_hex[n]); | |
482 | else | |
483 | sprintf(device, "/dev/sts/lp%c%d%c", i + 'C', j, | |
484 | funky_hex[n]); | |
485 | ||
486 | if (access(device, 0) == 0) | |
487 | { | |
488 | if (i == 8) | |
489 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
490 | device, j, n); | |
491 | else | |
492 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
493 | device, i, j, n); | |
494 | } | |
495 | } | |
496 | #elif defined(__hpux) | |
497 | int i, j, n; /* Looping vars */ | |
498 | char device[255]; /* Device filename */ | |
499 | ||
500 | ||
501 | /* | |
502 | * Standard parallel ports... | |
503 | */ | |
504 | ||
505 | if (access("/dev/rlp", 0) == 0) | |
506 | puts("direct parallel:/dev/rlp \"Unknown\" \"Standard Parallel Port (/dev/rlp)\""); | |
507 | ||
508 | for (i = 0; i < 7; i ++) | |
509 | for (j = 0; j < 7; j ++) | |
510 | { | |
511 | sprintf(device, "/dev/c%dt%dd0_lp", i, j); | |
512 | if (access(device, 0) == 0) | |
513 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d,%d\"\n", | |
514 | device, i, j); | |
515 | } | |
516 | ||
517 | /* | |
518 | * Central Data parallel ports... | |
519 | */ | |
520 | ||
521 | for (i = 0; i < 9; i ++) | |
522 | for (j = 0; j < 8; j ++) | |
523 | for (n = 0; n < 32; n ++) | |
524 | { | |
525 | if (i == 8) /* EtherLite */ | |
526 | sprintf(device, "/dev/lpN%d%c", j, funky_hex[n]); | |
527 | else | |
528 | sprintf(device, "/dev/lp%c%d%c", i + 'C', j, | |
529 | funky_hex[n]); | |
530 | ||
531 | if (access(device, 0) == 0) | |
532 | { | |
533 | if (i == 8) | |
534 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
535 | device, j, n); | |
536 | else | |
537 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
538 | device, i, j, n); | |
539 | } | |
540 | } | |
541 | #elif defined(__osf__) | |
542 | int i; /* Looping var */ | |
543 | int fd; /* File descriptor */ | |
544 | char device[255]; /* Device filename */ | |
545 | ||
546 | ||
547 | for (i = 0; i < 3; i ++) | |
548 | { | |
549 | sprintf(device, "/dev/lp%d", i); | |
550 | if ((fd = open(device, O_WRONLY)) >= 0) | |
551 | { | |
552 | close(fd); | |
553 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d\"\n", device, i + 1); | |
554 | } | |
555 | } | |
556 | #elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) | |
557 | int i; /* Looping var */ | |
558 | int fd; /* File descriptor */ | |
559 | char device[255]; /* Device filename */ | |
560 | ||
561 | ||
562 | for (i = 0; i < 3; i ++) | |
563 | { | |
564 | sprintf(device, "/dev/lpt%d", i); | |
565 | if ((fd = open(device, O_WRONLY)) >= 0) | |
566 | { | |
567 | close(fd); | |
568 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d (interrupt-driven)\"\n", device, i + 1); | |
569 | } | |
570 | ||
571 | sprintf(device, "/dev/lpa%d", i); | |
572 | if ((fd = open(device, O_WRONLY)) >= 0) | |
573 | { | |
574 | close(fd); | |
575 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d (polled)\"\n", device, i + 1); | |
576 | } | |
577 | } | |
578 | #elif defined(_AIX) | |
579 | int i; /* Looping var */ | |
580 | int fd; /* File descriptor */ | |
581 | char device[255]; /* Device filename */ | |
582 | ||
583 | ||
584 | for (i = 0; i < 8; i ++) | |
585 | { | |
586 | sprintf(device, "/dev/lp%d", i); | |
587 | if ((fd = open(device, O_WRONLY)) >= 0) | |
588 | { | |
589 | close(fd); | |
590 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d\"\n", device, i + 1); | |
591 | } | |
592 | } | |
593 | #endif | |
594 | } | |
595 | ||
596 | ||
597 | /* | |
598 | * 'side_cb()' - Handle side-channel requests... | |
599 | */ | |
600 | ||
601 | static void | |
602 | side_cb(int print_fd, /* I - Print file */ | |
603 | int device_fd, /* I - Device file */ | |
604 | int use_bc) /* I - Using back-channel? */ | |
605 | { | |
606 | cups_sc_command_t command; /* Request command */ | |
607 | cups_sc_status_t status; /* Request/response status */ | |
608 | char data[2048]; /* Request/response data */ | |
609 | int datalen; /* Request/response data size */ | |
610 | ||
611 | ||
612 | datalen = sizeof(data); | |
613 | ||
614 | if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0)) | |
615 | { | |
616 | fputs(_("WARNING: Failed to read side-channel request!\n"), stderr); | |
617 | return; | |
618 | } | |
619 | ||
620 | switch (command) | |
621 | { | |
622 | case CUPS_SC_CMD_DRAIN_OUTPUT : | |
623 | if (backendDrainOutput(print_fd, device_fd)) | |
624 | status = CUPS_SC_STATUS_IO_ERROR; | |
625 | else if (tcdrain(device_fd)) | |
626 | status = CUPS_SC_STATUS_IO_ERROR; | |
627 | else | |
628 | status = CUPS_SC_STATUS_OK; | |
629 | ||
630 | datalen = 0; | |
631 | break; | |
632 | ||
633 | case CUPS_SC_CMD_GET_BIDI : | |
634 | data[0] = use_bc; | |
635 | datalen = 1; | |
636 | break; | |
637 | ||
638 | case CUPS_SC_CMD_GET_DEVICE_ID : | |
639 | memset(data, 0, sizeof(data)); | |
640 | ||
641 | if (backendGetDeviceID(device_fd, data, sizeof(data) - 1, | |
642 | NULL, 0, NULL, NULL, 0)) | |
643 | { | |
644 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
645 | datalen = 0; | |
646 | } | |
647 | else | |
648 | { | |
649 | status = CUPS_SC_STATUS_OK; | |
650 | datalen = strlen(data); | |
651 | } | |
652 | break; | |
653 | ||
654 | default : | |
655 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
656 | datalen = 0; | |
657 | break; | |
658 | } | |
659 | ||
660 | cupsSideChannelWrite(command, status, data, datalen, 1.0); | |
661 | } | |
662 | ||
663 | ||
664 | /* | |
665 | * End of "$Id: parallel.c 6649 2007-07-11 21:46:42Z mike $". | |
666 | */ |