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ef416fc2 | 1 | /* |
c0e1af83 | 2 | * "$Id: parallel.c 6403 2007-03-27 16:00:56Z 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 | { | |
c0e1af83 | 134 | fprintf(stderr, _("Usage: %s job-id user title copies options [file]\n"), |
135 | argv[0]); | |
ef416fc2 | 136 | return (CUPS_BACKEND_FAILED); |
137 | } | |
138 | ||
139 | /* | |
140 | * If we have 7 arguments, print the file named on the command-line. | |
141 | * Otherwise, send stdin instead... | |
142 | */ | |
143 | ||
144 | if (argc == 6) | |
145 | { | |
ed486911 | 146 | print_fd = 0; |
147 | copies = 1; | |
ef416fc2 | 148 | } |
149 | else | |
150 | { | |
151 | /* | |
152 | * Try to open the print file... | |
153 | */ | |
154 | ||
ed486911 | 155 | if ((print_fd = open(argv[6], O_RDONLY)) < 0) |
ef416fc2 | 156 | { |
157 | perror("ERROR: unable to open print file"); | |
158 | return (CUPS_BACKEND_FAILED); | |
159 | } | |
160 | ||
161 | copies = atoi(argv[4]); | |
162 | } | |
163 | ||
164 | /* | |
165 | * Extract the device name and options from the URI... | |
166 | */ | |
167 | ||
a4d04587 | 168 | httpSeparateURI(HTTP_URI_CODING_ALL, cupsBackendDeviceURI(argv), |
169 | method, sizeof(method), username, sizeof(username), | |
170 | hostname, sizeof(hostname), &port, | |
ef416fc2 | 171 | resource, sizeof(resource)); |
172 | ||
173 | /* | |
174 | * See if there are any options... | |
175 | */ | |
176 | ||
177 | if ((options = strchr(resource, '?')) != NULL) | |
178 | { | |
179 | /* | |
180 | * Yup, terminate the device name string and move to the first | |
181 | * character of the options... | |
182 | */ | |
183 | ||
184 | *options++ = '\0'; | |
185 | } | |
186 | ||
187 | /* | |
188 | * Open the parallel port device... | |
189 | */ | |
190 | ||
757d2cad | 191 | fputs("STATE: +connecting-to-device\n", stderr); |
192 | ||
ef416fc2 | 193 | do |
194 | { | |
b86bc4cf | 195 | #if defined(__linux) || defined(__FreeBSD__) |
26d47ec6 | 196 | /* |
b86bc4cf | 197 | * The Linux and FreeBSD parallel port drivers currently are broken WRT |
198 | * select() and bidirection I/O... | |
26d47ec6 | 199 | */ |
200 | ||
201 | device_fd = open(resource, O_WRONLY | O_EXCL); | |
202 | use_bc = 0; | |
203 | ||
204 | #else | |
205 | if ((device_fd = open(resource, O_RDWR | O_EXCL)) < 0) | |
206 | { | |
207 | device_fd = open(resource, O_WRONLY | O_EXCL); | |
208 | use_bc = 0; | |
209 | } | |
210 | else | |
211 | use_bc = 1; | |
b86bc4cf | 212 | #endif /* __linux || __FreeBSD__ */ |
26d47ec6 | 213 | |
214 | if (device_fd == -1) | |
ef416fc2 | 215 | { |
216 | if (getenv("CLASS") != NULL) | |
217 | { | |
218 | /* | |
219 | * If the CLASS environment variable is set, the job was submitted | |
220 | * to a class and not to a specific queue. In this case, we want | |
221 | * to abort immediately so that the job can be requeued on the next | |
222 | * available printer in the class. | |
223 | */ | |
224 | ||
c0e1af83 | 225 | fputs(_("INFO: Unable to contact printer, queuing on next " |
226 | "printer in class...\n"), stderr); | |
ef416fc2 | 227 | |
228 | /* | |
229 | * Sleep 5 seconds to keep the job from requeuing too rapidly... | |
230 | */ | |
231 | ||
232 | sleep(5); | |
233 | ||
234 | return (CUPS_BACKEND_FAILED); | |
235 | } | |
236 | ||
237 | if (errno == EBUSY) | |
238 | { | |
c0e1af83 | 239 | fputs(_("INFO: Printer busy; will retry in 30 seconds...\n"), stderr); |
ef416fc2 | 240 | sleep(30); |
241 | } | |
242 | else if (errno == ENXIO || errno == EIO || errno == ENOENT) | |
243 | { | |
c0e1af83 | 244 | fputs(_("INFO: Printer not connected; will retry in 30 seconds...\n"), |
ed486911 | 245 | stderr); |
ef416fc2 | 246 | sleep(30); |
247 | } | |
248 | else | |
249 | { | |
c0e1af83 | 250 | fprintf(stderr, _("ERROR: Unable to open device file \"%s\": %s\n"), |
ef416fc2 | 251 | resource, strerror(errno)); |
252 | return (CUPS_BACKEND_FAILED); | |
253 | } | |
254 | } | |
255 | } | |
ed486911 | 256 | while (device_fd < 0); |
ef416fc2 | 257 | |
757d2cad | 258 | fputs("STATE: -connecting-to-device\n", stderr); |
259 | ||
ef416fc2 | 260 | /* |
261 | * Set any options provided... | |
262 | */ | |
263 | ||
ed486911 | 264 | tcgetattr(device_fd, &opts); |
ef416fc2 | 265 | |
266 | opts.c_lflag &= ~(ICANON | ECHO | ISIG); /* Raw mode */ | |
267 | ||
268 | /**** No options supported yet ****/ | |
269 | ||
ed486911 | 270 | tcsetattr(device_fd, TCSANOW, &opts); |
ef416fc2 | 271 | |
ef416fc2 | 272 | /* |
273 | * Finally, send the print file... | |
274 | */ | |
275 | ||
ed486911 | 276 | tbytes = 0; |
ef416fc2 | 277 | |
ed486911 | 278 | while (copies > 0 && tbytes >= 0) |
ef416fc2 | 279 | { |
280 | copies --; | |
281 | ||
ed486911 | 282 | if (print_fd != 0) |
ef416fc2 | 283 | { |
284 | fputs("PAGE: 1 1\n", stderr); | |
ed486911 | 285 | lseek(print_fd, 0, SEEK_SET); |
ef416fc2 | 286 | } |
287 | ||
f7deaa1a | 288 | tbytes = backendRunLoop(print_fd, device_fd, use_bc, side_cb); |
ef416fc2 | 289 | |
ed486911 | 290 | if (print_fd != 0 && tbytes >= 0) |
c0e1af83 | 291 | fprintf(stderr, |
292 | #ifdef HAVE_LONG_LONG | |
293 | _("INFO: Sent print file, %lld bytes...\n"), | |
294 | #else | |
295 | _("INFO: Sent print file, %ld bytes...\n"), | |
296 | #endif /* HAVE_LONG_LONG */ | |
297 | CUPS_LLCAST tbytes); | |
ef416fc2 | 298 | } |
299 | ||
300 | /* | |
301 | * Close the socket connection and input file and return... | |
302 | */ | |
303 | ||
ed486911 | 304 | close(device_fd); |
305 | ||
306 | if (print_fd != 0) | |
307 | close(print_fd); | |
ef416fc2 | 308 | |
ed486911 | 309 | return (tbytes < 0 ? CUPS_BACKEND_FAILED : CUPS_BACKEND_OK); |
ef416fc2 | 310 | } |
311 | ||
312 | ||
313 | /* | |
314 | * 'list_devices()' - List all parallel devices. | |
315 | */ | |
316 | ||
f7deaa1a | 317 | static void |
ef416fc2 | 318 | list_devices(void) |
319 | { | |
320 | #if defined(__hpux) || defined(__sgi) || defined(__sun) | |
321 | static char *funky_hex = "0123456789abcdefghijklmnopqrstuvwxyz"; | |
322 | /* Funky hex numbering used for some devices */ | |
323 | #endif /* __hpux || __sgi || __sun */ | |
324 | ||
325 | #ifdef __linux | |
326 | int i; /* Looping var */ | |
327 | int fd; /* File descriptor */ | |
328 | char device[255], /* Device filename */ | |
329 | basedevice[255], /* Base device filename for ports */ | |
330 | device_id[1024], /* Device ID string */ | |
331 | make_model[1024]; /* Make and model */ | |
332 | ||
333 | ||
334 | if (!access("/dev/parallel/", 0)) | |
335 | strcpy(basedevice, "/dev/parallel/"); | |
336 | else if (!access("/dev/printers/", 0)) | |
337 | strcpy(basedevice, "/dev/printers/"); | |
ef416fc2 | 338 | else |
339 | strcpy(basedevice, "/dev/lp"); | |
340 | ||
341 | for (i = 0; i < 4; i ++) | |
342 | { | |
343 | /* | |
344 | * Open the port, if available... | |
345 | */ | |
346 | ||
347 | sprintf(device, "%s%d", basedevice, i); | |
348 | if ((fd = open(device, O_RDWR | O_EXCL)) < 0) | |
349 | fd = open(device, O_WRONLY); | |
350 | ||
351 | if (fd >= 0) | |
352 | { | |
353 | /* | |
354 | * Now grab the IEEE 1284 device ID string... | |
355 | */ | |
356 | ||
ed486911 | 357 | if (!backendGetDeviceID(fd, device_id, sizeof(device_id), |
358 | make_model, sizeof(make_model), | |
359 | NULL, NULL, 0)) | |
ef416fc2 | 360 | printf("direct parallel:%s \"%s\" \"%s LPT #%d\" \"%s\"\n", device, |
361 | make_model, make_model, i + 1, device_id); | |
362 | else | |
363 | printf("direct parallel:%s \"Unknown\" \"LPT #%d\"\n", device, i + 1); | |
364 | ||
365 | close(fd); | |
366 | } | |
367 | } | |
368 | #elif defined(__sgi) | |
369 | int i, j, n; /* Looping vars */ | |
370 | char device[255]; /* Device filename */ | |
371 | inventory_t *inv; /* Hardware inventory info */ | |
372 | ||
373 | ||
374 | /* | |
375 | * IRIX maintains a hardware inventory of most devices... | |
376 | */ | |
377 | ||
378 | setinvent(); | |
379 | ||
380 | while ((inv = getinvent()) != NULL) | |
381 | { | |
382 | if (inv->inv_class == INV_PARALLEL && | |
383 | (inv->inv_type == INV_ONBOARD_PLP || | |
384 | inv->inv_type == INV_EPP_ECP_PLP)) | |
385 | { | |
386 | /* | |
387 | * Standard parallel port... | |
388 | */ | |
389 | ||
390 | puts("direct parallel:/dev/plp \"Unknown\" \"Onboard Parallel Port\""); | |
391 | } | |
392 | else if (inv->inv_class == INV_PARALLEL && | |
393 | inv->inv_type == INV_EPC_PLP) | |
394 | { | |
395 | /* | |
396 | * EPC parallel port... | |
397 | */ | |
398 | ||
399 | printf("direct parallel:/dev/plp%d \"Unknown\" \"Integral EPC parallel port, Ebus slot %d\"\n", | |
400 | inv->inv_controller, inv->inv_controller); | |
401 | } | |
402 | } | |
403 | ||
404 | endinvent(); | |
405 | ||
406 | /* | |
407 | * Central Data makes serial and parallel "servers" that can be | |
408 | * connected in a number of ways. Look for ports... | |
409 | */ | |
410 | ||
411 | for (i = 0; i < 10; i ++) | |
412 | for (j = 0; j < 8; j ++) | |
413 | for (n = 0; n < 32; n ++) | |
414 | { | |
415 | if (i == 8) /* EtherLite */ | |
416 | sprintf(device, "/dev/lpn%d%c", j, funky_hex[n]); | |
417 | else if (i == 9) /* PCI */ | |
418 | sprintf(device, "/dev/lpp%d%c", j, funky_hex[n]); | |
419 | else /* SCSI */ | |
420 | sprintf(device, "/dev/lp%d%d%c", i, j, funky_hex[n]); | |
421 | ||
422 | if (access(device, 0) == 0) | |
423 | { | |
424 | if (i == 8) | |
425 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
426 | device, j, n); | |
427 | else if (i == 9) | |
428 | printf("direct parallel:%s \"Unknown\" \"Central Data PCI Parallel Port, ID %d, port %d\"\n", | |
429 | device, j, n); | |
430 | else | |
431 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
432 | device, i, j, n); | |
433 | } | |
434 | } | |
435 | #elif defined(__sun) | |
436 | int i, j, n; /* Looping vars */ | |
437 | char device[255]; /* Device filename */ | |
438 | ||
439 | ||
440 | /* | |
441 | * Standard parallel ports... | |
442 | */ | |
443 | ||
444 | for (i = 0; i < 10; i ++) | |
445 | { | |
446 | sprintf(device, "/dev/ecpp%d", i); | |
447 | if (access(device, 0) == 0) | |
448 | printf("direct parallel:%s \"Unknown\" \"Sun IEEE-1284 Parallel Port #%d\"\n", | |
449 | device, i + 1); | |
450 | } | |
451 | ||
452 | for (i = 0; i < 10; i ++) | |
453 | { | |
454 | sprintf(device, "/dev/bpp%d", i); | |
455 | if (access(device, 0) == 0) | |
456 | printf("direct parallel:%s \"Unknown\" \"Sun Standard Parallel Port #%d\"\n", | |
457 | device, i + 1); | |
458 | } | |
459 | ||
460 | for (i = 0; i < 3; i ++) | |
461 | { | |
462 | sprintf(device, "/dev/lp%d", i); | |
463 | ||
464 | if (access(device, 0) == 0) | |
465 | printf("direct parallel:%s \"Unknown\" \"PC Parallel Port #%d\"\n", | |
466 | device, i + 1); | |
467 | } | |
468 | ||
469 | /* | |
470 | * MAGMA parallel ports... | |
471 | */ | |
472 | ||
473 | for (i = 0; i < 40; i ++) | |
474 | { | |
475 | sprintf(device, "/dev/pm%02d", i); | |
476 | if (access(device, 0) == 0) | |
477 | printf("direct parallel:%s \"Unknown\" \"MAGMA Parallel Board #%d Port #%d\"\n", | |
478 | device, (i / 10) + 1, (i % 10) + 1); | |
479 | } | |
480 | ||
481 | /* | |
482 | * Central Data parallel ports... | |
483 | */ | |
484 | ||
485 | for (i = 0; i < 9; i ++) | |
486 | for (j = 0; j < 8; j ++) | |
487 | for (n = 0; n < 32; n ++) | |
488 | { | |
489 | if (i == 8) /* EtherLite */ | |
490 | sprintf(device, "/dev/sts/lpN%d%c", j, funky_hex[n]); | |
491 | else | |
492 | sprintf(device, "/dev/sts/lp%c%d%c", i + 'C', j, | |
493 | funky_hex[n]); | |
494 | ||
495 | if (access(device, 0) == 0) | |
496 | { | |
497 | if (i == 8) | |
498 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
499 | device, j, n); | |
500 | else | |
501 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
502 | device, i, j, n); | |
503 | } | |
504 | } | |
505 | #elif defined(__hpux) | |
506 | int i, j, n; /* Looping vars */ | |
507 | char device[255]; /* Device filename */ | |
508 | ||
509 | ||
510 | /* | |
511 | * Standard parallel ports... | |
512 | */ | |
513 | ||
514 | if (access("/dev/rlp", 0) == 0) | |
515 | puts("direct parallel:/dev/rlp \"Unknown\" \"Standard Parallel Port (/dev/rlp)\""); | |
516 | ||
517 | for (i = 0; i < 7; i ++) | |
518 | for (j = 0; j < 7; j ++) | |
519 | { | |
520 | sprintf(device, "/dev/c%dt%dd0_lp", i, j); | |
521 | if (access(device, 0) == 0) | |
522 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d,%d\"\n", | |
523 | device, i, j); | |
524 | } | |
525 | ||
526 | /* | |
527 | * Central Data parallel ports... | |
528 | */ | |
529 | ||
530 | for (i = 0; i < 9; i ++) | |
531 | for (j = 0; j < 8; j ++) | |
532 | for (n = 0; n < 32; n ++) | |
533 | { | |
534 | if (i == 8) /* EtherLite */ | |
535 | sprintf(device, "/dev/lpN%d%c", j, funky_hex[n]); | |
536 | else | |
537 | sprintf(device, "/dev/lp%c%d%c", i + 'C', j, | |
538 | funky_hex[n]); | |
539 | ||
540 | if (access(device, 0) == 0) | |
541 | { | |
542 | if (i == 8) | |
543 | printf("direct parallel:%s \"Unknown\" \"Central Data EtherLite Parallel Port, ID %d, port %d\"\n", | |
544 | device, j, n); | |
545 | else | |
546 | printf("direct parallel:%s \"Unknown\" \"Central Data SCSI Parallel Port, logical bus %d, ID %d, port %d\"\n", | |
547 | device, i, j, n); | |
548 | } | |
549 | } | |
550 | #elif defined(__osf__) | |
551 | int i; /* Looping var */ | |
552 | int fd; /* File descriptor */ | |
553 | char device[255]; /* Device filename */ | |
554 | ||
555 | ||
556 | for (i = 0; i < 3; i ++) | |
557 | { | |
558 | sprintf(device, "/dev/lp%d", i); | |
559 | if ((fd = open(device, O_WRONLY)) >= 0) | |
560 | { | |
561 | close(fd); | |
562 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d\"\n", device, i + 1); | |
563 | } | |
564 | } | |
b423cd4c | 565 | #elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) |
ef416fc2 | 566 | int i; /* Looping var */ |
567 | int fd; /* File descriptor */ | |
568 | char device[255]; /* Device filename */ | |
569 | ||
570 | ||
571 | for (i = 0; i < 3; i ++) | |
572 | { | |
573 | sprintf(device, "/dev/lpt%d", i); | |
574 | if ((fd = open(device, O_WRONLY)) >= 0) | |
575 | { | |
576 | close(fd); | |
577 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d (interrupt-driven)\"\n", device, i + 1); | |
578 | } | |
579 | ||
580 | sprintf(device, "/dev/lpa%d", i); | |
581 | if ((fd = open(device, O_WRONLY)) >= 0) | |
582 | { | |
583 | close(fd); | |
584 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d (polled)\"\n", device, i + 1); | |
585 | } | |
586 | } | |
587 | #elif defined(_AIX) | |
588 | int i; /* Looping var */ | |
589 | int fd; /* File descriptor */ | |
590 | char device[255]; /* Device filename */ | |
591 | ||
592 | ||
593 | for (i = 0; i < 8; i ++) | |
594 | { | |
595 | sprintf(device, "/dev/lp%d", i); | |
596 | if ((fd = open(device, O_WRONLY)) >= 0) | |
597 | { | |
598 | close(fd); | |
599 | printf("direct parallel:%s \"Unknown\" \"Parallel Port #%d\"\n", device, i + 1); | |
600 | } | |
601 | } | |
602 | #endif | |
603 | } | |
604 | ||
605 | ||
606 | /* | |
f7deaa1a | 607 | * 'side_cb()' - Handle side-channel requests... |
608 | */ | |
609 | ||
610 | static void | |
611 | side_cb(int print_fd, /* I - Print file */ | |
612 | int device_fd, /* I - Device file */ | |
613 | int use_bc) /* I - Using back-channel? */ | |
614 | { | |
615 | cups_sc_command_t command; /* Request command */ | |
616 | cups_sc_status_t status; /* Request/response status */ | |
617 | char data[2048]; /* Request/response data */ | |
618 | int datalen; /* Request/response data size */ | |
619 | ||
620 | ||
621 | datalen = sizeof(data); | |
622 | ||
623 | if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0)) | |
624 | { | |
c0e1af83 | 625 | fputs(_("WARNING: Failed to read side-channel request!\n"), stderr); |
f7deaa1a | 626 | return; |
627 | } | |
628 | ||
629 | switch (command) | |
630 | { | |
631 | case CUPS_SC_CMD_DRAIN_OUTPUT : | |
632 | if (tcdrain(device_fd)) | |
633 | status = CUPS_SC_STATUS_IO_ERROR; | |
634 | else | |
635 | status = CUPS_SC_STATUS_OK; | |
636 | ||
637 | datalen = 0; | |
638 | break; | |
639 | ||
640 | case CUPS_SC_CMD_GET_BIDI : | |
641 | data[0] = use_bc; | |
642 | datalen = 1; | |
643 | break; | |
644 | ||
645 | case CUPS_SC_CMD_GET_DEVICE_ID : | |
646 | memset(data, 0, sizeof(data)); | |
647 | ||
648 | if (backendGetDeviceID(device_fd, data, sizeof(data) - 1, | |
649 | NULL, 0, NULL, NULL, 0)) | |
650 | { | |
651 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
652 | datalen = 0; | |
653 | } | |
654 | else | |
655 | { | |
656 | status = CUPS_SC_STATUS_OK; | |
657 | datalen = strlen(data); | |
658 | } | |
659 | break; | |
660 | ||
661 | default : | |
662 | status = CUPS_SC_STATUS_NOT_IMPLEMENTED; | |
663 | datalen = 0; | |
664 | break; | |
665 | } | |
666 | ||
667 | cupsSideChannelWrite(command, status, data, datalen, 1.0); | |
668 | } | |
669 | ||
670 | ||
671 | /* | |
c0e1af83 | 672 | * End of "$Id: parallel.c 6403 2007-03-27 16:00:56Z mike $". |
ef416fc2 | 673 | */ |