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ef416fc2 | 1 | /* |
f7deaa1a | 2 | * "$Id: parallel.c 6178 2007-01-03 18:09:17Z mike $" |
ef416fc2 | 3 | * |
4 | * Parallel port backend for the Common UNIX Printing System (CUPS). | |
5 | * | |
f7deaa1a | 6 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. |
ef416fc2 | 7 | * |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Easy Software Products and are protected by Federal | |
10 | * copyright law. Distribution and use rights are outlined in the file | |
11 | * "LICENSE" which should have been included with this file. If this | |
12 | * file is missing or damaged please contact Easy Software Products | |
13 | * at: | |
14 | * | |
15 | * Attn: CUPS Licensing Information | |
16 | * Easy Software Products | |
17 | * 44141 Airport View Drive, Suite 204 | |
18 | * Hollywood, Maryland 20636 USA | |
19 | * | |
20 | * Voice: (301) 373-9600 | |
21 | * EMail: cups-info@cups.org | |
22 | * WWW: http://www.cups.org | |
23 | * | |
24 | * This file is subject to the Apple OS-Developed Software exception. | |
25 | * | |
26 | * Contents: | |
27 | * | |
28 | * main() - Send a file to the specified parallel port. | |
29 | * list_devices() - List all parallel devices. | |
f7deaa1a | 30 | * side_cb() - Handle side-channel requests... |
ef416fc2 | 31 | */ |
32 | ||
33 | /* | |
34 | * Include necessary headers. | |
35 | */ | |
36 | ||
ed486911 | 37 | #include "backend-private.h" |
ef416fc2 | 38 | |
b423cd4c | 39 | #ifdef __hpux |
40 | # include <sys/time.h> | |
41 | #else | |
42 | # include <sys/select.h> | |
43 | #endif /* __hpux */ | |
44 | ||
ef416fc2 | 45 | #ifdef WIN32 |
46 | # include <io.h> | |
47 | #else | |
48 | # include <unistd.h> | |
49 | # include <fcntl.h> | |
50 | # include <termios.h> | |
51 | # include <sys/socket.h> | |
52 | #endif /* WIN32 */ | |
53 | ||
54 | #ifdef __sgi | |
55 | # include <invent.h> | |
56 | # ifndef INV_EPP_ECP_PLP | |
57 | # define INV_EPP_ECP_PLP 6 /* From 6.3/6.4/6.5 sys/invent.h */ | |
58 | # define INV_ASO_SERIAL 14 /* serial portion of SGI ASO board */ | |
59 | # define INV_IOC3_DMA 16 /* DMA mode IOC3 serial */ | |
60 | # define INV_IOC3_PIO 17 /* PIO mode IOC3 serial */ | |
61 | # define INV_ISA_DMA 19 /* DMA mode ISA serial -- O2 */ | |
62 | # endif /* !INV_EPP_ECP_PLP */ | |
63 | #endif /* __sgi */ | |
64 | ||
65 | ||
66 | /* | |
67 | * Local functions... | |
68 | */ | |
69 | ||
f7deaa1a | 70 | static void list_devices(void); |
71 | static void side_cb(int print_fd, int device_fd, int use_bc); | |
ef416fc2 | 72 | |
73 | ||
74 | /* | |
75 | * 'main()' - Send a file to the specified parallel port. | |
76 | * | |
77 | * Usage: | |
78 | * | |
79 | * printer-uri job-id user title copies options [file] | |
80 | */ | |
81 | ||
82 | int /* O - Exit status */ | |
83 | main(int argc, /* I - Number of command-line arguments (6 or 7) */ | |
84 | char *argv[]) /* I - Command-line arguments */ | |
85 | { | |
86 | char method[255], /* Method in URI */ | |
87 | hostname[1024], /* Hostname */ | |
88 | username[255], /* Username info (not used) */ | |
89 | resource[1024], /* Resource info (device and options) */ | |
90 | *options; /* Pointer to options */ | |
91 | int port; /* Port number (not used) */ | |
ed486911 | 92 | int print_fd, /* Print file */ |
26d47ec6 | 93 | device_fd, /* Parallel device */ |
94 | use_bc; /* Read back-channel data? */ | |
ef416fc2 | 95 | int copies; /* Number of copies to print */ |
ed486911 | 96 | size_t tbytes; /* Total number of bytes written */ |
ef416fc2 | 97 | struct termios opts; /* Parallel port options */ |
ef416fc2 | 98 | #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET) |
99 | struct sigaction action; /* Actions for POSIX signals */ | |
100 | #endif /* HAVE_SIGACTION && !HAVE_SIGSET */ | |
ef416fc2 | 101 | |
102 | ||
103 | /* | |
104 | * Make sure status messages are not buffered... | |
105 | */ | |
106 | ||
107 | setbuf(stderr, NULL); | |
108 | ||
109 | /* | |
110 | * Ignore SIGPIPE signals... | |
111 | */ | |
112 | ||
113 | #ifdef HAVE_SIGSET | |
114 | sigset(SIGPIPE, SIG_IGN); | |
115 | #elif defined(HAVE_SIGACTION) | |
116 | memset(&action, 0, sizeof(action)); | |
117 | action.sa_handler = SIG_IGN; | |
118 | sigaction(SIGPIPE, &action, NULL); | |
119 | #else | |
120 | signal(SIGPIPE, SIG_IGN); | |
121 | #endif /* HAVE_SIGSET */ | |
122 | ||
123 | /* | |
124 | * Check command-line... | |
125 | */ | |
126 | ||
127 | if (argc == 1) | |
128 | { | |
129 | list_devices(); | |
130 | return (CUPS_BACKEND_OK); | |
131 | } | |
132 | else if (argc < 6 || argc > 7) | |
133 | { | |
134 | fputs("Usage: parallel job-id user title copies options [file]\n", stderr); | |
135 | return (CUPS_BACKEND_FAILED); | |
136 | } | |
137 | ||
138 | /* | |
139 | * If we have 7 arguments, print the file named on the command-line. | |
140 | * Otherwise, send stdin instead... | |
141 | */ | |
142 | ||
143 | if (argc == 6) | |
144 | { | |
ed486911 | 145 | print_fd = 0; |
146 | copies = 1; | |
ef416fc2 | 147 | } |
148 | else | |
149 | { | |
150 | /* | |
151 | * Try to open the print file... | |
152 | */ | |
153 | ||
ed486911 | 154 | if ((print_fd = open(argv[6], O_RDONLY)) < 0) |
ef416fc2 | 155 | { |
156 | perror("ERROR: unable to open print file"); | |
157 | return (CUPS_BACKEND_FAILED); | |
158 | } | |
159 | ||
160 | copies = atoi(argv[4]); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Extract the device name and options from the URI... | |
165 | */ | |
166 | ||
a4d04587 | 167 | httpSeparateURI(HTTP_URI_CODING_ALL, cupsBackendDeviceURI(argv), |
168 | method, sizeof(method), username, sizeof(username), | |
169 | hostname, sizeof(hostname), &port, | |
ef416fc2 | 170 | resource, sizeof(resource)); |
171 | ||
172 | /* | |
173 | * See if there are any options... | |
174 | */ | |
175 | ||
176 | if ((options = strchr(resource, '?')) != NULL) | |
177 | { | |
178 | /* | |
179 | * Yup, terminate the device name string and move to the first | |
180 | * character of the options... | |
181 | */ | |
182 | ||
183 | *options++ = '\0'; | |
184 | } | |
185 | ||
186 | /* | |
187 | * Open the parallel port device... | |
188 | */ | |
189 | ||
757d2cad | 190 | fputs("STATE: +connecting-to-device\n", stderr); |
191 | ||
ef416fc2 | 192 | do |
193 | { | |
b86bc4cf | 194 | #if defined(__linux) || defined(__FreeBSD__) |
26d47ec6 | 195 | /* |
b86bc4cf | 196 | * The Linux and FreeBSD parallel port drivers currently are broken WRT |
197 | * select() and bidirection I/O... | |
26d47ec6 | 198 | */ |
199 | ||
200 | device_fd = open(resource, O_WRONLY | O_EXCL); | |
201 | use_bc = 0; | |
202 | ||
203 | #else | |
204 | if ((device_fd = open(resource, O_RDWR | O_EXCL)) < 0) | |
205 | { | |
206 | device_fd = open(resource, O_WRONLY | O_EXCL); | |
207 | use_bc = 0; | |
208 | } | |
209 | else | |
210 | use_bc = 1; | |
b86bc4cf | 211 | #endif /* __linux || __FreeBSD__ */ |
26d47ec6 | 212 | |
213 | if (device_fd == -1) | |
ef416fc2 | 214 | { |
215 | if (getenv("CLASS") != NULL) | |
216 | { | |
217 | /* | |
218 | * If the CLASS environment variable is set, the job was submitted | |
219 | * to a class and not to a specific queue. In this case, we want | |
220 | * to abort immediately so that the job can be requeued on the next | |
221 | * available printer in the class. | |
222 | */ | |
223 | ||
ed486911 | 224 | fputs("INFO: Unable to open parallel port, queuing on next printer " |
225 | "in class...\n", stderr); | |
ef416fc2 | 226 | |
227 | /* | |
228 | * Sleep 5 seconds to keep the job from requeuing too rapidly... | |
229 | */ | |
230 | ||
231 | sleep(5); | |
232 | ||
233 | return (CUPS_BACKEND_FAILED); | |
234 | } | |
235 | ||
236 | if (errno == EBUSY) | |
237 | { | |
ed486911 | 238 | fputs("INFO: Parallel port busy; will retry in 30 seconds...\n", |
239 | stderr); | |
ef416fc2 | 240 | sleep(30); |
241 | } | |
242 | else if (errno == ENXIO || errno == EIO || errno == ENOENT) | |
243 | { | |
ed486911 | 244 | fputs("INFO: Printer not connected; will retry in 30 seconds...\n", |
245 | stderr); | |
ef416fc2 | 246 | sleep(30); |
247 | } | |
248 | else | |
249 | { | |
ed486911 | 250 | fprintf(stderr, |
251 | "ERROR: Unable to open parallel port device file \"%s\": %s\n", | |
ef416fc2 | 252 | resource, strerror(errno)); |
253 | return (CUPS_BACKEND_FAILED); | |
254 | } | |
255 | } | |
256 | } | |
ed486911 | 257 | while (device_fd < 0); |
ef416fc2 | 258 | |
757d2cad | 259 | fputs("STATE: -connecting-to-device\n", stderr); |
260 | ||
ef416fc2 | 261 | /* |
262 | * Set any options provided... | |
263 | */ | |
264 | ||
ed486911 | 265 | tcgetattr(device_fd, &opts); |
ef416fc2 | 266 | |
267 | opts.c_lflag &= ~(ICANON | ECHO | ISIG); /* Raw mode */ | |
268 | ||
269 | /**** No options supported yet ****/ | |
270 | ||
ed486911 | 271 | tcsetattr(device_fd, TCSANOW, &opts); |
ef416fc2 | 272 | |
ef416fc2 | 273 | /* |
274 | * Finally, send the print file... | |
275 | */ | |
276 | ||
ed486911 | 277 | tbytes = 0; |
ef416fc2 | 278 | |
ed486911 | 279 | while (copies > 0 && tbytes >= 0) |
ef416fc2 | 280 | { |
281 | copies --; | |
282 | ||
ed486911 | 283 | if (print_fd != 0) |
ef416fc2 | 284 | { |
285 | fputs("PAGE: 1 1\n", stderr); | |
ed486911 | 286 | lseek(print_fd, 0, SEEK_SET); |
ef416fc2 | 287 | } |
288 | ||
f7deaa1a | 289 | tbytes = backendRunLoop(print_fd, device_fd, use_bc, side_cb); |
ef416fc2 | 290 | |
ed486911 | 291 | if (print_fd != 0 && tbytes >= 0) |
292 | fprintf(stderr, "INFO: Sent print file, " CUPS_LLFMT " bytes...\n", | |
293 | CUPS_LLCAST tbytes); | |
ef416fc2 | 294 | } |
295 | ||
296 | /* | |
297 | * Close the socket connection and input file and return... | |
298 | */ | |
299 | ||
ed486911 | 300 | close(device_fd); |
301 | ||
302 | if (print_fd != 0) | |
303 | close(print_fd); | |
ef416fc2 | 304 | |
ed486911 | 305 | return (tbytes < 0 ? CUPS_BACKEND_FAILED : CUPS_BACKEND_OK); |
ef416fc2 | 306 | } |
307 | ||
308 | ||
309 | /* | |
310 | * 'list_devices()' - List all parallel devices. | |
311 | */ | |
312 | ||
f7deaa1a | 313 | static void |
ef416fc2 | 314 | list_devices(void) |
315 | { | |
316 | #if defined(__hpux) || defined(__sgi) || defined(__sun) | |
317 | static char *funky_hex = "0123456789abcdefghijklmnopqrstuvwxyz"; | |
318 | /* Funky hex numbering used for some devices */ | |
319 | #endif /* __hpux || __sgi || __sun */ | |
320 | ||
321 | #ifdef __linux | |
322 | int i; /* Looping var */ | |
323 | int fd; /* File descriptor */ | |
324 | char device[255], /* Device filename */ | |
325 | basedevice[255], /* Base device filename for ports */ | |
326 | device_id[1024], /* Device ID string */ | |
327 | make_model[1024]; /* Make and model */ | |
328 | ||
329 | ||
330 | if (!access("/dev/parallel/", 0)) | |
331 | strcpy(basedevice, "/dev/parallel/"); | |
332 | else if (!access("/dev/printers/", 0)) | |
333 | strcpy(basedevice, "/dev/printers/"); | |
ef416fc2 | 334 | else |
335 | strcpy(basedevice, "/dev/lp"); | |
336 | ||
337 | for (i = 0; i < 4; i ++) | |
338 | { | |
339 | /* | |
340 | * Open the port, if available... | |
341 | */ | |
342 | ||
343 | sprintf(device, "%s%d", basedevice, i); | |
344 | if ((fd = open(device, O_RDWR | O_EXCL)) < 0) | |
345 | fd = open(device, O_WRONLY); | |
346 | ||
347 | if (fd >= 0) | |
348 | { | |
349 | /* | |
350 | * Now grab the IEEE 1284 device ID string... | |
351 | */ | |
352 | ||
ed486911 | 353 | if (!backendGetDeviceID(fd, device_id, sizeof(device_id), |
354 | make_model, sizeof(make_model), | |
355 | NULL, NULL, 0)) | |
ef416fc2 | 356 | printf("direct parallel:%s \"%s\" \"%s LPT #%d\" \"%s\"\n", device, |
357 | make_model, make_model, i + 1, device_id); | |
358 | else | |
359 | printf("direct parallel:%s \"Unknown\" \"LPT #%d\"\n", device, i + 1); | |
360 | ||
361 | close(fd); | |
362 | } | |
363 | } | |
364 | #elif defined(__sgi) | |
365 | int i, j, n; /* Looping vars */ | |
366 | char device[255]; /* Device filename */ | |
367 | inventory_t *inv; /* Hardware inventory info */ | |
368 | ||
369 | ||
370 | /* | |
371 | * IRIX maintains a hardware inventory of most devices... | |
372 | */ | |
373 | ||
374 | setinvent(); | |
375 | ||
376 | while ((inv = getinvent()) != NULL) | |
377 | { | |
378 | if (inv->inv_class == INV_PARALLEL && | |
379 | (inv->inv_type == INV_ONBOARD_PLP || | |
380 | inv->inv_type == INV_EPP_ECP_PLP)) | |
381 | { | |
382 | /* | |
383 | * Standard parallel port... | |
384 | */ | |
385 | ||
386 | puts("direct parallel:/dev/plp \"Unknown\" \"Onboard Parallel Port\""); | |
387 | } | |
388 | else if (inv->inv_class == INV_PARALLEL && | |
389 | inv->inv_type == INV_EPC_PLP) | |
390 | { | |
391 | /* | |
392 | * EPC parallel port... | |
393 | */ | |
394 | ||
395 | printf("direct parallel:/dev/plp%d \"Unknown\" \"Integral EPC parallel port, Ebus slot %d\"\n", | |
396 | inv->inv_controller, inv->inv_controller); | |
397 | } | |
398 | } | |
399 | ||
400 | endinvent(); | |
401 | ||
402 | /* | |
403 | * Central Data makes serial and parallel "servers" that can be | |
404 | * connected in a number of ways. Look for ports... | |
405 | */ | |
406 | ||
407 | for (i = 0; i < 10; i ++) | |
408 | for (j = 0; j < 8; j ++) | |
409 | for (n = 0; n < 32; n ++) | |
410 | { | |
411 | if (i == 8) /* EtherLite */ | |
412 | sprintf(device, "/dev/lpn%d%c", j, funky_hex[n]); | |
413 | else if (i == 9) /* PCI */ | |
414 | sprintf(device, "/dev/lpp%d%c", j, funky_hex[n]); | |
415 | else /* SCSI */ | |
416 | sprintf(device, "/dev/lp%d%d%c", i, j, funky_hex[n]); | |
417 | ||
418 | if (access(device, 0) == 0) | |
419 | { | |
420 | if (i == 8) | |
421 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
422 | device, j, n); | |
423 | else if (i == 9) | |
424 | printf("direct parallel:%s \"Unknown\" \"Central Data PCI Parallel Port, ID %d, port %d\"\n", | |
425 | device, j, n); | |
426 | else | |
427 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
428 | device, i, j, n); | |
429 | } | |
430 | } | |
431 | #elif defined(__sun) | |
432 | int i, j, n; /* Looping vars */ | |
433 | char device[255]; /* Device filename */ | |
434 | ||
435 | ||
436 | /* | |
437 | * Standard parallel ports... | |
438 | */ | |
439 | ||
440 | for (i = 0; i < 10; i ++) | |
441 | { | |
442 | sprintf(device, "/dev/ecpp%d", i); | |
443 | if (access(device, 0) == 0) | |
444 | printf("direct parallel:%s \"Unknown\" \"Sun IEEE-1284 Parallel Port #%d\"\n", | |
445 | device, i + 1); | |
446 | } | |
447 | ||
448 | for (i = 0; i < 10; i ++) | |
449 | { | |
450 | sprintf(device, "/dev/bpp%d", i); | |
451 | if (access(device, 0) == 0) | |
452 | printf("direct parallel:%s \"Unknown\" \"Sun Standard Parallel Port #%d\"\n", | |
453 | device, i + 1); | |
454 | } | |
455 | ||
456 | for (i = 0; i < 3; i ++) | |
457 | { | |
458 | sprintf(device, "/dev/lp%d", i); | |
459 | ||
460 | if (access(device, 0) == 0) | |
461 | printf("direct parallel:%s \"Unknown\" \"PC Parallel Port #%d\"\n", | |
462 | device, i + 1); | |
463 | } | |
464 | ||
465 | /* | |
466 | * MAGMA parallel ports... | |
467 | */ | |
468 | ||
469 | for (i = 0; i < 40; i ++) | |
470 | { | |
471 | sprintf(device, "/dev/pm%02d", i); | |
472 | if (access(device, 0) == 0) | |
473 | printf("direct parallel:%s \"Unknown\" \"MAGMA Parallel Board #%d Port #%d\"\n", | |
474 | device, (i / 10) + 1, (i % 10) + 1); | |
475 | } | |
476 | ||
477 | /* | |
478 | * Central Data parallel ports... | |
479 | */ | |
480 | ||
481 | for (i = 0; i < 9; i ++) | |
482 | for (j = 0; j < 8; j ++) | |
483 | for (n = 0; n < 32; n ++) | |
484 | { | |
485 | if (i == 8) /* EtherLite */ | |
486 | sprintf(device, "/dev/sts/lpN%d%c", j, funky_hex[n]); | |
487 | else | |
488 | sprintf(device, "/dev/sts/lp%c%d%c", i + 'C', j, | |
489 | funky_hex[n]); | |
490 | ||
491 | if (access(device, 0) == 0) | |
492 | { | |
493 | if (i == 8) | |
494 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
495 | device, j, n); | |
496 | else | |
497 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
498 | device, i, j, n); | |
499 | } | |
500 | } | |
501 | #elif defined(__hpux) | |
502 | int i, j, n; /* Looping vars */ | |
503 | char device[255]; /* Device filename */ | |
504 | ||
505 | ||
506 | /* | |
507 | * Standard parallel ports... | |
508 | */ | |
509 | ||
510 | if (access("/dev/rlp", 0) == 0) | |
511 | puts("direct parallel:/dev/rlp \"Unknown\" \"Standard Parallel Port (/dev/rlp)\""); | |
512 | ||
513 | for (i = 0; i < 7; i ++) | |
514 | for (j = 0; j < 7; j ++) | |
515 | { | |
516 | sprintf(device, "/dev/c%dt%dd0_lp", i, j); | |
517 | if (access(device, 0) == 0) | |
518 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d,%d\"\n", | |
519 | device, i, j); | |
520 | } | |
521 | ||
522 | /* | |
523 | * Central Data parallel ports... | |
524 | */ | |
525 | ||
526 | for (i = 0; i < 9; i ++) | |
527 | for (j = 0; j < 8; j ++) | |
528 | for (n = 0; n < 32; n ++) | |
529 | { | |
530 | if (i == 8) /* EtherLite */ | |
531 | sprintf(device, "/dev/lpN%d%c", j, funky_hex[n]); | |
532 | else | |
533 | sprintf(device, "/dev/lp%c%d%c", i + 'C', j, | |
534 | funky_hex[n]); | |
535 | ||
536 | if (access(device, 0) == 0) | |
537 | { | |
538 | if (i == 8) | |
539 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
540 | device, j, n); | |
541 | else | |
542 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
543 | device, i, j, n); | |
544 | } | |
545 | } | |
546 | #elif defined(__osf__) | |
547 | int i; /* Looping var */ | |
548 | int fd; /* File descriptor */ | |
549 | char device[255]; /* Device filename */ | |
550 | ||
551 | ||
552 | for (i = 0; i < 3; i ++) | |
553 | { | |
554 | sprintf(device, "/dev/lp%d", i); | |
555 | if ((fd = open(device, O_WRONLY)) >= 0) | |
556 | { | |
557 | close(fd); | |
558 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d\"\n", device, i + 1); | |
559 | } | |
560 | } | |
b423cd4c | 561 | #elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) |
ef416fc2 | 562 | int i; /* Looping var */ |
563 | int fd; /* File descriptor */ | |
564 | char device[255]; /* Device filename */ | |
565 | ||
566 | ||
567 | for (i = 0; i < 3; i ++) | |
568 | { | |
569 | sprintf(device, "/dev/lpt%d", i); | |
570 | if ((fd = open(device, O_WRONLY)) >= 0) | |
571 | { | |
572 | close(fd); | |
573 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d (interrupt-driven)\"\n", device, i + 1); | |
574 | } | |
575 | ||
576 | sprintf(device, "/dev/lpa%d", i); | |
577 | if ((fd = open(device, O_WRONLY)) >= 0) | |
578 | { | |
579 | close(fd); | |
580 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d (polled)\"\n", device, i + 1); | |
581 | } | |
582 | } | |
583 | #elif defined(_AIX) | |
584 | int i; /* Looping var */ | |
585 | int fd; /* File descriptor */ | |
586 | char device[255]; /* Device filename */ | |
587 | ||
588 | ||
589 | for (i = 0; i < 8; i ++) | |
590 | { | |
591 | sprintf(device, "/dev/lp%d", i); | |
592 | if ((fd = open(device, O_WRONLY)) >= 0) | |
593 | { | |
594 | close(fd); | |
595 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d\"\n", device, i + 1); | |
596 | } | |
597 | } | |
598 | #endif | |
599 | } | |
600 | ||
601 | ||
602 | /* | |
f7deaa1a | 603 | * 'side_cb()' - Handle side-channel requests... |
604 | */ | |
605 | ||
606 | static void | |
607 | side_cb(int print_fd, /* I - Print file */ | |
608 | int device_fd, /* I - Device file */ | |
609 | int use_bc) /* I - Using back-channel? */ | |
610 | { | |
611 | cups_sc_command_t command; /* Request command */ | |
612 | cups_sc_status_t status; /* Request/response status */ | |
613 | char data[2048]; /* Request/response data */ | |
614 | int datalen; /* Request/response data size */ | |
615 | ||
616 | ||
617 | datalen = sizeof(data); | |
618 | ||
619 | if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0)) | |
620 | { | |
621 | fputs("WARNING: Failed to read side-channel request!\n", stderr); | |
622 | return; | |
623 | } | |
624 | ||
625 | switch (command) | |
626 | { | |
627 | case CUPS_SC_CMD_DRAIN_OUTPUT : | |
628 | if (tcdrain(device_fd)) | |
629 | status = CUPS_SC_STATUS_IO_ERROR; | |
630 | else | |
631 | status = CUPS_SC_STATUS_OK; | |
632 | ||
633 | datalen = 0; | |
634 | break; | |
635 | ||
636 | case CUPS_SC_CMD_GET_BIDI : | |
637 | data[0] = use_bc; | |
638 | datalen = 1; | |
639 | break; | |
640 | ||
641 | case CUPS_SC_CMD_GET_DEVICE_ID : | |
642 | memset(data, 0, sizeof(data)); | |
643 | ||
644 | if (backendGetDeviceID(device_fd, data, sizeof(data) - 1, | |
645 | NULL, 0, NULL, NULL, 0)) | |
646 | { | |
647 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
648 | datalen = 0; | |
649 | } | |
650 | else | |
651 | { | |
652 | status = CUPS_SC_STATUS_OK; | |
653 | datalen = strlen(data); | |
654 | } | |
655 | break; | |
656 | ||
657 | default : | |
658 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
659 | datalen = 0; | |
660 | break; | |
661 | } | |
662 | ||
663 | cupsSideChannelWrite(command, status, data, datalen, 1.0); | |
664 | } | |
665 | ||
666 | ||
667 | /* | |
668 | * End of "$Id: parallel.c 6178 2007-01-03 18:09:17Z mike $". | |
ef416fc2 | 669 | */ |