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1 | /* | |
2 | * "$Id: parallel.c 7810 2008-07-29 01:11:15Z mike $" | |
3 | * | |
4 | * Parallel port backend for the Common UNIX Printing System (CUPS). | |
5 | * | |
6 | * Copyright 2007-2008 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 snmp_fd, | |
63 | http_addr_t *addr, int use_bc); | |
64 | ||
65 | ||
66 | /* | |
67 | * 'main()' - Send a file to the specified parallel port. | |
68 | * | |
69 | * Usage: | |
70 | * | |
71 | * printer-uri job-id user title copies options [file] | |
72 | */ | |
73 | ||
74 | int /* O - Exit status */ | |
75 | main(int argc, /* I - Number of command-line arguments (6 or 7) */ | |
76 | char *argv[]) /* I - Command-line arguments */ | |
77 | { | |
78 | char method[255], /* Method in URI */ | |
79 | hostname[1024], /* Hostname */ | |
80 | username[255], /* Username info (not used) */ | |
81 | resource[1024], /* Resource info (device and options) */ | |
82 | *options; /* Pointer to options */ | |
83 | int port; /* Port number (not used) */ | |
84 | int print_fd, /* Print file */ | |
85 | device_fd, /* Parallel device */ | |
86 | use_bc; /* Read back-channel data? */ | |
87 | int copies; /* Number of copies to print */ | |
88 | size_t tbytes; /* Total number of bytes written */ | |
89 | struct termios opts; /* Parallel port options */ | |
90 | #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET) | |
91 | struct sigaction action; /* Actions for POSIX signals */ | |
92 | #endif /* HAVE_SIGACTION && !HAVE_SIGSET */ | |
93 | ||
94 | ||
95 | /* | |
96 | * Make sure status messages are not buffered... | |
97 | */ | |
98 | ||
99 | setbuf(stderr, NULL); | |
100 | ||
101 | /* | |
102 | * Ignore SIGPIPE signals... | |
103 | */ | |
104 | ||
105 | #ifdef HAVE_SIGSET | |
106 | sigset(SIGPIPE, SIG_IGN); | |
107 | #elif defined(HAVE_SIGACTION) | |
108 | memset(&action, 0, sizeof(action)); | |
109 | action.sa_handler = SIG_IGN; | |
110 | sigaction(SIGPIPE, &action, NULL); | |
111 | #else | |
112 | signal(SIGPIPE, SIG_IGN); | |
113 | #endif /* HAVE_SIGSET */ | |
114 | ||
115 | /* | |
116 | * Check command-line... | |
117 | */ | |
118 | ||
119 | if (argc == 1) | |
120 | { | |
121 | list_devices(); | |
122 | return (CUPS_BACKEND_OK); | |
123 | } | |
124 | else if (argc < 6 || argc > 7) | |
125 | { | |
126 | _cupsLangPrintf(stderr, | |
127 | _("Usage: %s job-id user title copies options [file]\n"), | |
128 | argv[0]); | |
129 | return (CUPS_BACKEND_FAILED); | |
130 | } | |
131 | ||
132 | /* | |
133 | * If we have 7 arguments, print the file named on the command-line. | |
134 | * Otherwise, send stdin instead... | |
135 | */ | |
136 | ||
137 | if (argc == 6) | |
138 | { | |
139 | print_fd = 0; | |
140 | copies = 1; | |
141 | } | |
142 | else | |
143 | { | |
144 | /* | |
145 | * Try to open the print file... | |
146 | */ | |
147 | ||
148 | if ((print_fd = open(argv[6], O_RDONLY)) < 0) | |
149 | { | |
150 | _cupsLangPrintf(stderr, | |
151 | _("ERROR: Unable to open print file \"%s\": %s\n"), | |
152 | argv[6], strerror(errno)); | |
153 | return (CUPS_BACKEND_FAILED); | |
154 | } | |
155 | ||
156 | copies = atoi(argv[4]); | |
157 | } | |
158 | ||
159 | /* | |
160 | * Extract the device name and options from the URI... | |
161 | */ | |
162 | ||
163 | httpSeparateURI(HTTP_URI_CODING_ALL, cupsBackendDeviceURI(argv), | |
164 | method, sizeof(method), username, sizeof(username), | |
165 | hostname, sizeof(hostname), &port, | |
166 | resource, sizeof(resource)); | |
167 | ||
168 | /* | |
169 | * See if there are any options... | |
170 | */ | |
171 | ||
172 | if ((options = strchr(resource, '?')) != NULL) | |
173 | { | |
174 | /* | |
175 | * Yup, terminate the device name string and move to the first | |
176 | * character of the options... | |
177 | */ | |
178 | ||
179 | *options++ = '\0'; | |
180 | } | |
181 | ||
182 | /* | |
183 | * Open the parallel port device... | |
184 | */ | |
185 | ||
186 | fputs("STATE: +connecting-to-device\n", stderr); | |
187 | ||
188 | do | |
189 | { | |
190 | #if defined(__linux) || defined(__FreeBSD__) | |
191 | /* | |
192 | * The Linux and FreeBSD parallel port drivers currently are broken WRT | |
193 | * select() and bidirection I/O... | |
194 | */ | |
195 | ||
196 | device_fd = open(resource, O_WRONLY | O_EXCL); | |
197 | use_bc = 0; | |
198 | ||
199 | #else | |
200 | if ((device_fd = open(resource, O_RDWR | O_EXCL)) < 0) | |
201 | { | |
202 | device_fd = open(resource, O_WRONLY | O_EXCL); | |
203 | use_bc = 0; | |
204 | } | |
205 | else | |
206 | use_bc = 1; | |
207 | #endif /* __linux || __FreeBSD__ */ | |
208 | ||
209 | if (device_fd == -1) | |
210 | { | |
211 | if (getenv("CLASS") != NULL) | |
212 | { | |
213 | /* | |
214 | * If the CLASS environment variable is set, the job was submitted | |
215 | * to a class and not to a specific queue. In this case, we want | |
216 | * to abort immediately so that the job can be requeued on the next | |
217 | * available printer in the class. | |
218 | */ | |
219 | ||
220 | _cupsLangPuts(stderr, | |
221 | _("INFO: Unable to contact printer, queuing on next " | |
222 | "printer in class...\n")); | |
223 | ||
224 | /* | |
225 | * Sleep 5 seconds to keep the job from requeuing too rapidly... | |
226 | */ | |
227 | ||
228 | sleep(5); | |
229 | ||
230 | return (CUPS_BACKEND_FAILED); | |
231 | } | |
232 | ||
233 | if (errno == EBUSY) | |
234 | { | |
235 | _cupsLangPuts(stderr, | |
236 | _("INFO: Printer busy; will retry in 30 seconds...\n")); | |
237 | sleep(30); | |
238 | } | |
239 | else if (errno == ENXIO || errno == EIO || errno == ENOENT) | |
240 | { | |
241 | _cupsLangPuts(stderr, | |
242 | _("INFO: Printer not connected; will retry in 30 " | |
243 | "seconds...\n")); | |
244 | sleep(30); | |
245 | } | |
246 | else | |
247 | { | |
248 | _cupsLangPrintf(stderr, | |
249 | _("ERROR: Unable to open device file \"%s\": %s\n"), | |
250 | resource, strerror(errno)); | |
251 | return (CUPS_BACKEND_FAILED); | |
252 | } | |
253 | } | |
254 | } | |
255 | while (device_fd < 0); | |
256 | ||
257 | fputs("STATE: -connecting-to-device\n", stderr); | |
258 | ||
259 | /* | |
260 | * Set any options provided... | |
261 | */ | |
262 | ||
263 | tcgetattr(device_fd, &opts); | |
264 | ||
265 | opts.c_lflag &= ~(ICANON | ECHO | ISIG); /* Raw mode */ | |
266 | ||
267 | /**** No options supported yet ****/ | |
268 | ||
269 | tcsetattr(device_fd, TCSANOW, &opts); | |
270 | ||
271 | /* | |
272 | * Finally, send the print file... | |
273 | */ | |
274 | ||
275 | tbytes = 0; | |
276 | ||
277 | while (copies > 0 && tbytes >= 0) | |
278 | { | |
279 | copies --; | |
280 | ||
281 | if (print_fd != 0) | |
282 | { | |
283 | fputs("PAGE: 1 1\n", stderr); | |
284 | lseek(print_fd, 0, SEEK_SET); | |
285 | } | |
286 | ||
287 | tbytes = backendRunLoop(print_fd, device_fd, -1, NULL, use_bc, side_cb); | |
288 | ||
289 | if (print_fd != 0 && tbytes >= 0) | |
290 | _cupsLangPrintf(stderr, | |
291 | #ifdef HAVE_LONG_LONG | |
292 | _("INFO: Sent print file, %lld bytes...\n"), | |
293 | #else | |
294 | _("INFO: Sent print file, %ld bytes...\n"), | |
295 | #endif /* HAVE_LONG_LONG */ | |
296 | CUPS_LLCAST tbytes); | |
297 | } | |
298 | ||
299 | /* | |
300 | * Close the socket connection and input file and return... | |
301 | */ | |
302 | ||
303 | close(device_fd); | |
304 | ||
305 | if (print_fd != 0) | |
306 | close(print_fd); | |
307 | ||
308 | return (tbytes < 0 ? CUPS_BACKEND_FAILED : CUPS_BACKEND_OK); | |
309 | } | |
310 | ||
311 | ||
312 | /* | |
313 | * 'list_devices()' - List all parallel devices. | |
314 | */ | |
315 | ||
316 | static void | |
317 | list_devices(void) | |
318 | { | |
319 | #if defined(__hpux) || defined(__sgi) || defined(__sun) | |
320 | static char *funky_hex = "0123456789abcdefghijklmnopqrstuvwxyz"; | |
321 | /* Funky hex numbering used for some devices */ | |
322 | #endif /* __hpux || __sgi || __sun */ | |
323 | ||
324 | #ifdef __linux | |
325 | int i; /* Looping var */ | |
326 | int fd; /* File descriptor */ | |
327 | char device[255], /* Device filename */ | |
328 | basedevice[255], /* Base device filename for ports */ | |
329 | device_id[1024], /* Device ID string */ | |
330 | make_model[1024], /* Make and model */ | |
331 | info[1024], /* Info string */ | |
332 | uri[1024]; /* Device URI */ | |
333 | ||
334 | ||
335 | if (!access("/dev/parallel/", 0)) | |
336 | strcpy(basedevice, "/dev/parallel/"); | |
337 | else if (!access("/dev/printers/", 0)) | |
338 | strcpy(basedevice, "/dev/printers/"); | |
339 | else | |
340 | strcpy(basedevice, "/dev/lp"); | |
341 | ||
342 | for (i = 0; i < 4; i ++) | |
343 | { | |
344 | /* | |
345 | * Open the port, if available... | |
346 | */ | |
347 | ||
348 | sprintf(device, "%s%d", basedevice, i); | |
349 | if ((fd = open(device, O_RDWR | O_EXCL)) < 0) | |
350 | fd = open(device, O_WRONLY); | |
351 | ||
352 | if (fd >= 0) | |
353 | { | |
354 | /* | |
355 | * Now grab the IEEE 1284 device ID string... | |
356 | */ | |
357 | ||
358 | snprintf(uri, sizeof(uri), "parallel:%s", device); | |
359 | ||
360 | if (!backendGetDeviceID(fd, device_id, sizeof(device_id), | |
361 | make_model, sizeof(make_model), | |
362 | NULL, uri, sizeof(uri))) | |
363 | { | |
364 | snprintf(info, sizeof(info), "%s LPT #%d", make_model, i + 1); | |
365 | cupsBackendReport("direct", uri, make_model, info, device_id, NULL); | |
366 | } | |
367 | else | |
368 | { | |
369 | snprintf(info, sizeof(info), "LPT #%d", i + 1); | |
370 | cupsBackendReport("direct", uri, NULL, info, NULL, NULL); | |
371 | } | |
372 | ||
373 | close(fd); | |
374 | } | |
375 | } | |
376 | #elif defined(__sgi) | |
377 | int i, j, n; /* Looping vars */ | |
378 | char device[255]; /* Device filename */ | |
379 | inventory_t *inv; /* Hardware inventory info */ | |
380 | ||
381 | ||
382 | /* | |
383 | * IRIX maintains a hardware inventory of most devices... | |
384 | */ | |
385 | ||
386 | setinvent(); | |
387 | ||
388 | while ((inv = getinvent()) != NULL) | |
389 | { | |
390 | if (inv->inv_class == INV_PARALLEL && | |
391 | (inv->inv_type == INV_ONBOARD_PLP || | |
392 | inv->inv_type == INV_EPP_ECP_PLP)) | |
393 | { | |
394 | /* | |
395 | * Standard parallel port... | |
396 | */ | |
397 | ||
398 | puts("direct parallel:/dev/plp \"Unknown\" \"Onboard Parallel Port\""); | |
399 | } | |
400 | else if (inv->inv_class == INV_PARALLEL && | |
401 | inv->inv_type == INV_EPC_PLP) | |
402 | { | |
403 | /* | |
404 | * EPC parallel port... | |
405 | */ | |
406 | ||
407 | printf("direct parallel:/dev/plp%d \"Unknown\" \"Integral EPC parallel port, Ebus slot %d\"\n", | |
408 | inv->inv_controller, inv->inv_controller); | |
409 | } | |
410 | } | |
411 | ||
412 | endinvent(); | |
413 | ||
414 | /* | |
415 | * Central Data makes serial and parallel "servers" that can be | |
416 | * connected in a number of ways. Look for ports... | |
417 | */ | |
418 | ||
419 | for (i = 0; i < 10; i ++) | |
420 | for (j = 0; j < 8; j ++) | |
421 | for (n = 0; n < 32; n ++) | |
422 | { | |
423 | if (i == 8) /* EtherLite */ | |
424 | sprintf(device, "/dev/lpn%d%c", j, funky_hex[n]); | |
425 | else if (i == 9) /* PCI */ | |
426 | sprintf(device, "/dev/lpp%d%c", j, funky_hex[n]); | |
427 | else /* SCSI */ | |
428 | sprintf(device, "/dev/lp%d%d%c", i, j, funky_hex[n]); | |
429 | ||
430 | if (access(device, 0) == 0) | |
431 | { | |
432 | if (i == 8) | |
433 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
434 | device, j, n); | |
435 | else if (i == 9) | |
436 | printf("direct parallel:%s \"Unknown\" \"Central Data PCI Parallel Port, ID %d, port %d\"\n", | |
437 | device, j, n); | |
438 | else | |
439 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
440 | device, i, j, n); | |
441 | } | |
442 | } | |
443 | #elif defined(__sun) | |
444 | int i, j, n; /* Looping vars */ | |
445 | char device[255]; /* Device filename */ | |
446 | ||
447 | ||
448 | /* | |
449 | * Standard parallel ports... | |
450 | */ | |
451 | ||
452 | for (i = 0; i < 10; i ++) | |
453 | { | |
454 | sprintf(device, "/dev/ecpp%d", i); | |
455 | if (access(device, 0) == 0) | |
456 | printf("direct parallel:%s \"Unknown\" \"Sun IEEE-1284 Parallel Port #%d\"\n", | |
457 | device, i + 1); | |
458 | } | |
459 | ||
460 | for (i = 0; i < 10; i ++) | |
461 | { | |
462 | sprintf(device, "/dev/bpp%d", i); | |
463 | if (access(device, 0) == 0) | |
464 | printf("direct parallel:%s \"Unknown\" \"Sun Standard Parallel Port #%d\"\n", | |
465 | device, i + 1); | |
466 | } | |
467 | ||
468 | for (i = 0; i < 3; i ++) | |
469 | { | |
470 | sprintf(device, "/dev/lp%d", i); | |
471 | ||
472 | if (access(device, 0) == 0) | |
473 | printf("direct parallel:%s \"Unknown\" \"PC Parallel Port #%d\"\n", | |
474 | device, i + 1); | |
475 | } | |
476 | ||
477 | /* | |
478 | * MAGMA parallel ports... | |
479 | */ | |
480 | ||
481 | for (i = 0; i < 40; i ++) | |
482 | { | |
483 | sprintf(device, "/dev/pm%02d", i); | |
484 | if (access(device, 0) == 0) | |
485 | printf("direct parallel:%s \"Unknown\" \"MAGMA Parallel Board #%d Port #%d\"\n", | |
486 | device, (i / 10) + 1, (i % 10) + 1); | |
487 | } | |
488 | ||
489 | /* | |
490 | * Central Data parallel ports... | |
491 | */ | |
492 | ||
493 | for (i = 0; i < 9; i ++) | |
494 | for (j = 0; j < 8; j ++) | |
495 | for (n = 0; n < 32; n ++) | |
496 | { | |
497 | if (i == 8) /* EtherLite */ | |
498 | sprintf(device, "/dev/sts/lpN%d%c", j, funky_hex[n]); | |
499 | else | |
500 | sprintf(device, "/dev/sts/lp%c%d%c", i + 'C', j, | |
501 | funky_hex[n]); | |
502 | ||
503 | if (access(device, 0) == 0) | |
504 | { | |
505 | if (i == 8) | |
506 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
507 | device, j, n); | |
508 | else | |
509 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
510 | device, i, j, n); | |
511 | } | |
512 | } | |
513 | #elif defined(__hpux) | |
514 | int i, j, n; /* Looping vars */ | |
515 | char device[255]; /* Device filename */ | |
516 | ||
517 | ||
518 | /* | |
519 | * Standard parallel ports... | |
520 | */ | |
521 | ||
522 | if (access("/dev/rlp", 0) == 0) | |
523 | puts("direct parallel:/dev/rlp \"Unknown\" \"Standard Parallel Port (/dev/rlp)\""); | |
524 | ||
525 | for (i = 0; i < 7; i ++) | |
526 | for (j = 0; j < 7; j ++) | |
527 | { | |
528 | sprintf(device, "/dev/c%dt%dd0_lp", i, j); | |
529 | if (access(device, 0) == 0) | |
530 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d,%d\"\n", | |
531 | device, i, j); | |
532 | } | |
533 | ||
534 | /* | |
535 | * Central Data parallel ports... | |
536 | */ | |
537 | ||
538 | for (i = 0; i < 9; i ++) | |
539 | for (j = 0; j < 8; j ++) | |
540 | for (n = 0; n < 32; n ++) | |
541 | { | |
542 | if (i == 8) /* EtherLite */ | |
543 | sprintf(device, "/dev/lpN%d%c", j, funky_hex[n]); | |
544 | else | |
545 | sprintf(device, "/dev/lp%c%d%c", i + 'C', j, | |
546 | funky_hex[n]); | |
547 | ||
548 | if (access(device, 0) == 0) | |
549 | { | |
550 | if (i == 8) | |
551 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
552 | device, j, n); | |
553 | else | |
554 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
555 | device, i, j, n); | |
556 | } | |
557 | } | |
558 | #elif defined(__osf__) | |
559 | int i; /* Looping var */ | |
560 | int fd; /* File descriptor */ | |
561 | char device[255]; /* Device filename */ | |
562 | ||
563 | ||
564 | for (i = 0; i < 3; i ++) | |
565 | { | |
566 | sprintf(device, "/dev/lp%d", i); | |
567 | if ((fd = open(device, O_WRONLY)) >= 0) | |
568 | { | |
569 | close(fd); | |
570 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d\"\n", device, i + 1); | |
571 | } | |
572 | } | |
573 | #elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__) | |
574 | int i; /* Looping var */ | |
575 | int fd; /* File descriptor */ | |
576 | char device[255]; /* Device filename */ | |
577 | ||
578 | ||
579 | for (i = 0; i < 3; i ++) | |
580 | { | |
581 | sprintf(device, "/dev/lpt%d", i); | |
582 | if ((fd = open(device, O_WRONLY)) >= 0) | |
583 | { | |
584 | close(fd); | |
585 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d (interrupt-driven)\"\n", device, i + 1); | |
586 | } | |
587 | ||
588 | sprintf(device, "/dev/lpa%d", i); | |
589 | if ((fd = open(device, O_WRONLY)) >= 0) | |
590 | { | |
591 | close(fd); | |
592 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d (polled)\"\n", device, i + 1); | |
593 | } | |
594 | } | |
595 | #elif defined(_AIX) | |
596 | int i; /* Looping var */ | |
597 | int fd; /* File descriptor */ | |
598 | char device[255]; /* Device filename */ | |
599 | ||
600 | ||
601 | for (i = 0; i < 8; i ++) | |
602 | { | |
603 | sprintf(device, "/dev/lp%d", i); | |
604 | if ((fd = open(device, O_WRONLY)) >= 0) | |
605 | { | |
606 | close(fd); | |
607 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d\"\n", device, i + 1); | |
608 | } | |
609 | } | |
610 | #endif | |
611 | } | |
612 | ||
613 | ||
614 | /* | |
615 | * 'side_cb()' - Handle side-channel requests... | |
616 | */ | |
617 | ||
618 | static void | |
619 | side_cb(int print_fd, /* I - Print file */ | |
620 | int device_fd, /* I - Device file */ | |
621 | int snmp_fd, /* I - SNMP socket (unused) */ | |
622 | http_addr_t *addr, /* I - Device address (unused) */ | |
623 | int use_bc) /* I - Using back-channel? */ | |
624 | { | |
625 | cups_sc_command_t command; /* Request command */ | |
626 | cups_sc_status_t status; /* Request/response status */ | |
627 | char data[2048]; /* Request/response data */ | |
628 | int datalen; /* Request/response data size */ | |
629 | ||
630 | ||
631 | (void)snmp_fd; | |
632 | (void)addr; | |
633 | ||
634 | datalen = sizeof(data); | |
635 | ||
636 | if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0)) | |
637 | { | |
638 | _cupsLangPuts(stderr, _("WARNING: Failed to read side-channel request!\n")); | |
639 | return; | |
640 | } | |
641 | ||
642 | switch (command) | |
643 | { | |
644 | case CUPS_SC_CMD_DRAIN_OUTPUT : | |
645 | if (backendDrainOutput(print_fd, device_fd)) | |
646 | status = CUPS_SC_STATUS_IO_ERROR; | |
647 | else if (tcdrain(device_fd)) | |
648 | status = CUPS_SC_STATUS_IO_ERROR; | |
649 | else | |
650 | status = CUPS_SC_STATUS_OK; | |
651 | ||
652 | datalen = 0; | |
653 | break; | |
654 | ||
655 | case CUPS_SC_CMD_GET_BIDI : | |
656 | data[0] = use_bc; | |
657 | datalen = 1; | |
658 | break; | |
659 | ||
660 | case CUPS_SC_CMD_GET_DEVICE_ID : | |
661 | memset(data, 0, sizeof(data)); | |
662 | ||
663 | if (backendGetDeviceID(device_fd, data, sizeof(data) - 1, | |
664 | NULL, 0, NULL, NULL, 0)) | |
665 | { | |
666 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
667 | datalen = 0; | |
668 | } | |
669 | else | |
670 | { | |
671 | status = CUPS_SC_STATUS_OK; | |
672 | datalen = strlen(data); | |
673 | } | |
674 | break; | |
675 | ||
676 | default : | |
677 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
678 | datalen = 0; | |
679 | break; | |
680 | } | |
681 | ||
682 | cupsSideChannelWrite(command, status, data, datalen, 1.0); | |
683 | } | |
684 | ||
685 | ||
686 | /* | |
687 | * End of "$Id: parallel.c 7810 2008-07-29 01:11:15Z mike $". | |
688 | */ |