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ef416fc2 | 1 | /* |
bd7854cb | 2 | * "$Id: usb-unix.c 5099 2006-02-13 02:46:10Z mike $" |
ef416fc2 | 3 | * |
4 | * USB port backend for the Common UNIX Printing System (CUPS). | |
5 | * | |
6 | * This file is included from "usb.c" when compiled on UNIX/Linux. | |
7 | * | |
bd7854cb | 8 | * Copyright 1997-2006 by Easy Software Products, all rights reserved. |
ef416fc2 | 9 | * |
10 | * These coded instructions, statements, and computer programs are the | |
11 | * property of Easy Software Products and are protected by Federal | |
12 | * copyright law. Distribution and use rights are outlined in the file | |
13 | * "LICENSE" which should have been included with this file. If this | |
14 | * file is missing or damaged please contact Easy Software Products | |
15 | * at: | |
16 | * | |
17 | * Attn: CUPS Licensing Information | |
18 | * Easy Software Products | |
19 | * 44141 Airport View Drive, Suite 204 | |
20 | * Hollywood, Maryland 20636 USA | |
21 | * | |
22 | * Voice: (301) 373-9600 | |
23 | * EMail: cups-info@cups.org | |
24 | * WWW: http://www.cups.org | |
25 | * | |
26 | * This file is subject to the Apple OS-Developed Software exception. | |
27 | * | |
28 | * Contents: | |
29 | * | |
30 | * main() - Send a file to the specified USB port. | |
31 | * list_devices() - List all USB devices. | |
32 | */ | |
33 | ||
34 | /* | |
35 | * Include necessary headers. | |
36 | */ | |
37 | ||
38 | #include "ieee1284.c" | |
39 | #include <sys/select.h> | |
40 | ||
41 | ||
42 | /* | |
43 | * Local functions... | |
44 | */ | |
45 | ||
46 | int open_device(const char *uri); | |
47 | ||
48 | ||
49 | /* | |
50 | * 'print_device()' - Print a file to a USB device. | |
51 | */ | |
52 | ||
53 | int /* O - Exit status */ | |
54 | print_device(const char *uri, /* I - Device URI */ | |
55 | const char *hostname, /* I - Hostname/manufacturer */ | |
56 | const char *resource, /* I - Resource/modelname */ | |
57 | const char *options, /* I - Device options/serial number */ | |
58 | int fp, /* I - File descriptor to print */ | |
59 | int copies) /* I - Copies to print */ | |
60 | { | |
61 | int fd; /* USB device */ | |
62 | int rbytes; /* Number of bytes read */ | |
63 | int wbytes; /* Number of bytes written */ | |
64 | size_t nbytes, /* Number of bytes read */ | |
65 | tbytes; /* Total number of bytes written */ | |
66 | char buffer[8192], /* Output buffer */ | |
67 | *bufptr, /* Pointer into buffer */ | |
68 | backbuf[1024]; /* Backchannel buffer */ | |
69 | struct termios opts; /* Parallel port options */ | |
70 | fd_set input, /* Input set for select() */ | |
71 | output; /* Output set for select() */ | |
72 | int paperout; /* Paper out? */ | |
73 | #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET) | |
74 | struct sigaction action; /* Actions for POSIX signals */ | |
75 | #endif /* HAVE_SIGACTION && !HAVE_SIGSET */ | |
76 | #ifdef __linux | |
77 | unsigned int status; /* Port status (off-line, out-of-paper, etc.) */ | |
78 | #endif /* __linux */ | |
79 | ||
80 | ||
81 | /* | |
82 | * Open the USB port device... | |
83 | */ | |
84 | ||
85 | do | |
86 | { | |
87 | if ((fd = open_device(uri)) == -1) | |
88 | { | |
89 | if (getenv("CLASS") != NULL) | |
90 | { | |
91 | /* | |
92 | * If the CLASS environment variable is set, the job was submitted | |
93 | * to a class and not to a specific queue. In this case, we want | |
94 | * to abort immediately so that the job can be requeued on the next | |
95 | * available printer in the class. | |
96 | */ | |
97 | ||
98 | fputs("INFO: Unable to open USB device, queuing on next printer in class...\n", | |
99 | stderr); | |
100 | ||
101 | /* | |
102 | * Sleep 5 seconds to keep the job from requeuing too rapidly... | |
103 | */ | |
104 | ||
105 | sleep(5); | |
106 | ||
107 | return (CUPS_BACKEND_FAILED); | |
108 | } | |
109 | ||
110 | if (errno == EBUSY) | |
111 | { | |
112 | fputs("INFO: USB port busy; will retry in 30 seconds...\n", stderr); | |
113 | sleep(30); | |
114 | } | |
115 | else if (errno == ENXIO || errno == EIO || errno == ENOENT || errno == ENODEV) | |
116 | { | |
117 | fputs("INFO: Printer not connected; will retry in 30 seconds...\n", stderr); | |
118 | sleep(30); | |
119 | } | |
120 | else | |
121 | { | |
122 | fprintf(stderr, "ERROR: Unable to open USB device \"%s\": %s\n", | |
123 | uri, strerror(errno)); | |
124 | return (CUPS_BACKEND_FAILED); | |
125 | } | |
126 | } | |
127 | } | |
128 | while (fd < 0); | |
129 | ||
130 | /* | |
131 | * Set any options provided... | |
132 | */ | |
133 | ||
134 | tcgetattr(fd, &opts); | |
135 | ||
136 | opts.c_lflag &= ~(ICANON | ECHO | ISIG); /* Raw mode */ | |
137 | ||
138 | /**** No options supported yet ****/ | |
139 | ||
140 | tcsetattr(fd, TCSANOW, &opts); | |
141 | ||
142 | /* | |
143 | * Check printer status... | |
144 | */ | |
145 | ||
146 | paperout = 0; | |
147 | ||
148 | #if defined(__linux) && defined(LP_POUTPA) | |
149 | /* | |
150 | * Show the printer status before we send the file... | |
151 | */ | |
152 | ||
153 | while (!ioctl(fd, LPGETSTATUS, &status)) | |
154 | { | |
155 | fprintf(stderr, "DEBUG: LPGETSTATUS returned a port status of %02X...\n", status); | |
156 | ||
157 | if (status & LP_POUTPA) | |
158 | { | |
159 | fputs("WARNING: Media tray empty!\n", stderr); | |
160 | fputs("STATUS: +media-tray-empty-error\n", stderr); | |
161 | ||
162 | paperout = 1; | |
163 | } | |
164 | ||
165 | if (!(status & LP_PERRORP)) | |
166 | fputs("WARNING: Printer fault!\n", stderr); | |
167 | else if (!(status & LP_PSELECD)) | |
168 | fputs("WARNING: Printer off-line.\n", stderr); | |
169 | else | |
170 | break; | |
171 | ||
172 | sleep(5); | |
173 | } | |
174 | #endif /* __linux && LP_POUTPA */ | |
175 | ||
176 | /* | |
177 | * Now that we are "connected" to the port, ignore SIGTERM so that we | |
178 | * can finish out any page data the driver sends (e.g. to eject the | |
179 | * current page... Only ignore SIGTERM if we are printing data from | |
180 | * stdin (otherwise you can't cancel raw jobs...) | |
181 | */ | |
182 | ||
183 | if (!fp) | |
184 | { | |
185 | #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */ | |
186 | sigset(SIGTERM, SIG_IGN); | |
187 | #elif defined(HAVE_SIGACTION) | |
188 | memset(&action, 0, sizeof(action)); | |
189 | ||
190 | sigemptyset(&action.sa_mask); | |
191 | action.sa_handler = SIG_IGN; | |
192 | sigaction(SIGTERM, &action, NULL); | |
193 | #else | |
194 | signal(SIGTERM, SIG_IGN); | |
195 | #endif /* HAVE_SIGSET */ | |
196 | } | |
197 | ||
198 | /* | |
199 | * Finally, send the print file... | |
200 | */ | |
201 | ||
202 | wbytes = 0; | |
203 | ||
204 | while (copies > 0) | |
205 | { | |
206 | copies --; | |
207 | ||
208 | if (fp != 0) | |
209 | { | |
210 | fputs("PAGE: 1 1\n", stderr); | |
211 | lseek(fp, 0, SEEK_SET); | |
212 | } | |
213 | ||
214 | tbytes = 0; | |
215 | while ((nbytes = read(fp, buffer, sizeof(buffer))) > 0) | |
216 | { | |
217 | /* | |
218 | * Write the print data to the printer... | |
219 | */ | |
220 | ||
221 | tbytes += nbytes; | |
222 | bufptr = buffer; | |
223 | ||
224 | while (nbytes > 0) | |
225 | { | |
226 | /* | |
227 | * See if we are ready to read or write... | |
228 | */ | |
229 | ||
230 | do | |
231 | { | |
232 | FD_ZERO(&input); | |
233 | FD_SET(fd, &input); | |
234 | FD_ZERO(&output); | |
235 | FD_SET(fd, &output); | |
236 | } | |
237 | while (select(fd + 1, &input, &output, NULL, NULL) < 0); | |
238 | ||
239 | if (FD_ISSET(fd, &input)) | |
240 | { | |
241 | /* | |
242 | * Read backchannel data... | |
243 | */ | |
244 | ||
245 | if ((rbytes = read(fd, backbuf, sizeof(backbuf))) > 0) | |
246 | { | |
247 | fprintf(stderr, "DEBUG: Received %d bytes of back-channel data!\n", | |
248 | rbytes); | |
bd7854cb | 249 | cupsBackChannelWrite(backbuf, rbytes, 1.0); |
ef416fc2 | 250 | } |
251 | } | |
252 | ||
253 | if (FD_ISSET(fd, &output)) | |
254 | { | |
255 | /* | |
256 | * Write print data... | |
257 | */ | |
258 | ||
259 | if ((wbytes = write(fd, bufptr, nbytes)) < 0) | |
260 | if (errno == ENOTTY) | |
261 | wbytes = write(fd, bufptr, nbytes); | |
262 | ||
263 | if (wbytes < 0) | |
264 | { | |
265 | /* | |
266 | * Check for retryable errors... | |
267 | */ | |
268 | ||
269 | if (errno == ENOSPC) | |
270 | { | |
271 | paperout = 1; | |
272 | fputs("ERROR: Out of paper!\n", stderr); | |
273 | fputs("STATUS: +media-tray-empty-error\n", stderr); | |
274 | } | |
275 | else if (errno != EAGAIN && errno != EINTR) | |
276 | { | |
277 | perror("ERROR: Unable to send print file to printer"); | |
278 | break; | |
279 | } | |
280 | } | |
281 | else | |
282 | { | |
283 | /* | |
284 | * Update count and pointer... | |
285 | */ | |
286 | ||
287 | if (paperout) | |
288 | { | |
289 | fputs("STATUS: -media-tray-empty-error\n", stderr); | |
290 | paperout = 0; | |
291 | } | |
292 | ||
293 | nbytes -= wbytes; | |
294 | bufptr += wbytes; | |
295 | } | |
296 | } | |
297 | } | |
298 | ||
299 | if (wbytes < 0) | |
300 | break; | |
301 | ||
302 | if (fp) | |
303 | fprintf(stderr, "INFO: Sending print file, %lu bytes...\n", | |
304 | (unsigned long)tbytes); | |
305 | } | |
306 | } | |
307 | ||
308 | /* | |
309 | * Close the USB port and return... | |
310 | */ | |
311 | ||
312 | close(fd); | |
313 | ||
314 | return (wbytes < 0 ? CUPS_BACKEND_FAILED : CUPS_BACKEND_OK); | |
315 | } | |
316 | ||
317 | ||
318 | /* | |
319 | * 'list_devices()' - List all USB devices. | |
320 | */ | |
321 | ||
322 | void | |
323 | list_devices(void) | |
324 | { | |
325 | #ifdef __linux | |
326 | int i; /* Looping var */ | |
327 | int fd; /* File descriptor */ | |
328 | char format[255], /* Format for device filename */ | |
329 | device[255], /* Device filename */ | |
330 | device_id[1024], /* Device ID string */ | |
331 | device_uri[1024], /* Device URI string */ | |
332 | make_model[1024]; /* Make and model */ | |
333 | ||
334 | ||
335 | /* | |
336 | * First figure out which USB printer filename to use... | |
337 | */ | |
338 | ||
339 | if (!access("/dev/usblp0", 0)) | |
340 | strcpy(format, "/dev/usblp%d"); | |
341 | else if (!access("/dev/usb/usblp0", 0)) | |
342 | strcpy(format, "/dev/usb/usblp%d"); | |
343 | else | |
344 | strcpy(format, "/dev/usb/lp%d"); | |
345 | ||
346 | /* | |
347 | * Then open each USB device... | |
348 | */ | |
349 | ||
350 | for (i = 0; i < 16; i ++) | |
351 | { | |
352 | sprintf(device, format, i); | |
353 | ||
354 | if ((fd = open(device, O_RDWR | O_EXCL)) >= 0) | |
355 | { | |
356 | if (!get_device_id(fd, device_id, sizeof(device_id), | |
357 | make_model, sizeof(make_model), | |
358 | "usb", device_uri, sizeof(device_uri))) | |
359 | printf("direct %s \"%s\" \"%s USB #%d\" \"%s\"\n", device_uri, | |
360 | make_model, make_model, i + 1, device_id); | |
361 | ||
362 | close(fd); | |
363 | } | |
364 | } | |
365 | #elif defined(__sgi) | |
366 | #elif defined(__sun) && defined(ECPPIOC_GETDEVID) | |
367 | int i; /* Looping var */ | |
368 | int fd; /* File descriptor */ | |
369 | char device[255], /* Device filename */ | |
370 | device_id[1024], /* Device ID string */ | |
371 | device_uri[1024], /* Device URI string */ | |
372 | make_model[1024]; /* Make and model */ | |
373 | struct ecpp_device_id did; /* Device ID buffer */ | |
374 | ||
375 | ||
376 | /* | |
377 | * Open each USB device... | |
378 | */ | |
379 | ||
380 | for (i = 0; i < 8; i ++) | |
381 | { | |
382 | sprintf(device, "/dev/usb/printer%d", i); | |
383 | ||
384 | if ((fd = open(device, O_RDWR | O_EXCL)) >= 0) | |
385 | { | |
386 | if (!get_device_id(fd, device_id, sizeof(device_id), | |
387 | make_model, sizeof(make_model), | |
388 | "usb", device_uri, sizeof(device_uri))) | |
389 | printf("direct %s \"%s\" \"%s USB #%d\" \"%s\"\n", device_uri, | |
390 | make_model, make_model, i + 1, device_id); | |
391 | ||
392 | close(fd); | |
393 | } | |
394 | } | |
395 | #elif defined(__hpux) | |
396 | #elif defined(__osf) | |
397 | #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) | |
398 | int i; /* Looping var */ | |
399 | char device[255]; /* Device filename */ | |
400 | ||
401 | ||
402 | for (i = 0; i < 8; i ++) | |
403 | { | |
404 | sprintf(device, "/dev/ulpt%d", i); | |
405 | if (!access(device, 0)) | |
406 | printf("direct usb:%s \"Unknown\" \"USB Printer #%d\"\n", device, i + 1); | |
407 | ||
408 | sprintf(device, "/dev/unlpt%d", i); | |
409 | if (!access(device, 0)) | |
410 | printf("direct usb:%s \"Unknown\" \"USB Printer #%d (no reset)\"\n", device, i + 1); | |
411 | } | |
412 | #endif | |
413 | } | |
414 | ||
415 | ||
416 | /* | |
417 | * 'open_device()' - Open a USB device... | |
418 | */ | |
419 | ||
420 | int /* O - File descriptor or -1 on error */ | |
421 | open_device(const char *uri) /* I - Device URI */ | |
422 | { | |
423 | /* | |
424 | * The generic implementation just treats the URI as a device filename... | |
425 | * Specific operating systems may also support using the device serial | |
426 | * number and/or make/model. | |
427 | */ | |
428 | ||
429 | if (!strncmp(uri, "usb:/dev/", 9)) | |
430 | #ifdef __linux | |
431 | return (-1); /* Do not allow direct devices anymore */ | |
432 | else if (!strncmp(uri, "usb://", 6)) | |
433 | { | |
434 | /* | |
435 | * For Linux, try looking up the device serial number or model... | |
436 | */ | |
437 | ||
438 | int i; /* Looping var */ | |
439 | int busy; /* Are any ports busy? */ | |
440 | int fd; /* File descriptor */ | |
441 | char format[255], /* Format for device filename */ | |
442 | device[255], /* Device filename */ | |
443 | device_id[1024], /* Device ID string */ | |
444 | make_model[1024], /* Make and model */ | |
445 | device_uri[1024]; /* Device URI string */ | |
446 | ||
447 | ||
448 | /* | |
449 | * First figure out which USB printer filename to use... | |
450 | */ | |
451 | ||
452 | if (!access("/dev/usblp0", 0)) | |
453 | strcpy(format, "/dev/usblp%d"); | |
454 | else if (!access("/dev/usb/usblp0", 0)) | |
455 | strcpy(format, "/dev/usb/usblp%d"); | |
456 | else | |
457 | strcpy(format, "/dev/usb/lp%d"); | |
458 | ||
459 | /* | |
460 | * Then find the correct USB device... | |
461 | */ | |
462 | ||
463 | do | |
464 | { | |
465 | for (busy = 0, i = 0; i < 16; i ++) | |
466 | { | |
467 | sprintf(device, format, i); | |
468 | ||
469 | if ((fd = open(device, O_RDWR | O_EXCL)) >= 0) | |
470 | { | |
471 | get_device_id(fd, device_id, sizeof(device_id), | |
472 | make_model, sizeof(make_model), | |
473 | "usb", device_uri, sizeof(device_uri)); | |
474 | } | |
475 | else | |
476 | { | |
477 | /* | |
478 | * If the open failed because it was busy, flag it so we retry | |
479 | * as needed... | |
480 | */ | |
481 | ||
482 | if (errno == EBUSY) | |
483 | busy = 1; | |
484 | ||
485 | device_uri[0] = '\0'; | |
486 | } | |
487 | ||
488 | if (!strcmp(uri, device_uri)) | |
489 | { | |
490 | /* | |
491 | * Yes, return this file descriptor... | |
492 | */ | |
493 | ||
494 | fprintf(stderr, "DEBUG: Printer using device file \"%s\"...\n", device); | |
495 | ||
496 | return (fd); | |
497 | } | |
498 | ||
499 | /* | |
500 | * This wasn't the one... | |
501 | */ | |
502 | ||
503 | if (fd >= 0) | |
504 | close(fd); | |
505 | } | |
506 | ||
507 | /* | |
508 | * If we get here and at least one of the printer ports showed up | |
509 | * as "busy", then sleep for a bit and retry... | |
510 | */ | |
511 | ||
512 | if (busy) | |
513 | { | |
514 | fputs("INFO: USB printer is busy; will retry in 5 seconds...\n", | |
515 | stderr); | |
516 | sleep(5); | |
517 | } | |
518 | } | |
519 | while (busy); | |
520 | ||
521 | /* | |
522 | * Couldn't find the printer, return "no such device or address"... | |
523 | */ | |
524 | ||
525 | errno = ENODEV; | |
526 | ||
527 | return (-1); | |
528 | } | |
529 | #elif defined(__sun) && defined(ECPPIOC_GETDEVID) | |
530 | return (-1); /* Do not allow direct devices anymore */ | |
531 | else if (!strncmp(uri, "usb://", 6)) | |
532 | { | |
533 | /* | |
534 | * For Solaris, try looking up the device serial number or model... | |
535 | */ | |
536 | ||
537 | int i; /* Looping var */ | |
538 | int busy; /* Are any ports busy? */ | |
539 | int fd; /* File descriptor */ | |
540 | char device[255], /* Device filename */ | |
541 | device_id[1024], /* Device ID string */ | |
542 | make_model[1024], /* Make and model */ | |
543 | device_uri[1024]; /* Device URI string */ | |
544 | struct ecpp_device_id did; /* Device ID buffer */ | |
545 | ||
546 | ||
547 | /* | |
548 | * Find the correct USB device... | |
549 | */ | |
550 | ||
551 | do | |
552 | { | |
553 | for (i = 0, busy = 0; i < 8; i ++) | |
554 | { | |
555 | sprintf(device, "/dev/usb/printer%d", i); | |
556 | ||
557 | if ((fd = open(device, O_RDWR | O_EXCL)) >= 0) | |
558 | get_device_id(fd, device_id, sizeof(device_id), | |
559 | make_model, sizeof(make_model), | |
560 | "usb", device_uri, sizeof(device_uri)); | |
561 | else | |
562 | { | |
563 | /* | |
564 | * If the open failed because it was busy, flag it so we retry | |
565 | * as needed... | |
566 | */ | |
567 | ||
568 | if (errno == EBUSY) | |
569 | busy = 1; | |
570 | ||
571 | device_uri[0] = '\0'; | |
572 | } | |
573 | ||
574 | if (!strcmp(uri, device_uri)) | |
575 | return (fd); /* Yes, return this file descriptor... */ | |
576 | ||
577 | /* | |
578 | * This wasn't the one... | |
579 | */ | |
580 | ||
581 | if (fd >= 0) | |
582 | close(fd); | |
583 | } | |
584 | ||
585 | /* | |
586 | * If we get here and at least one of the printer ports showed up | |
587 | * as "busy", then sleep for a bit and retry... | |
588 | */ | |
589 | ||
590 | if (busy) | |
591 | { | |
592 | fputs("INFO: USB printer is busy; will retry in 5 seconds...\n", | |
593 | stderr); | |
594 | sleep(5); | |
595 | } | |
596 | } | |
597 | while (busy); | |
598 | ||
599 | /* | |
600 | * Couldn't find the printer, return "no such device or address"... | |
601 | */ | |
602 | ||
603 | errno = ENODEV; | |
604 | ||
605 | return (-1); | |
606 | } | |
607 | #else | |
608 | return (open(uri + 4, O_RDWR | O_EXCL)); | |
609 | #endif /* __linux */ | |
610 | else | |
611 | { | |
612 | errno = ENODEV; | |
613 | return (-1); | |
614 | } | |
615 | } | |
616 | ||
617 | ||
618 | /* | |
bd7854cb | 619 | * End of "$Id: usb-unix.c 5099 2006-02-13 02:46:10Z mike $". |
ef416fc2 | 620 | */ |