[thirdparty/cups.git] / backend / usb-unix.c

/*
 * "$Id$"
 *
 *   USB port backend for the Common UNIX Printing System (CUPS).
 *
 *   This file is included from "usb.c" when compiled on UNIX/Linux.
 *
 *   Copyright 1997-2006 by Easy Software Products, all rights reserved.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Easy Software Products and are protected by Federal
 *   copyright law.  Distribution and use rights are outlined in the file
 *   "LICENSE" which should have been included with this file.  If this
 *   file is missing or damaged please contact Easy Software Products
 *   at:
 *
 *       Attn: CUPS Licensing Information
 *       Easy Software Products
 *       44141 Airport View Drive, Suite 204
 *       Hollywood, Maryland 20636 USA
 *
 *       Voice: (301) 373-9600
 *       EMail: cups-info@cups.org
 *         WWW: http://www.cups.org
 *
 *   This file is subject to the Apple OS-Developed Software exception.
 *
 * Contents:
 *
 *   print_device() - Print a file to a USB device.
 *   list_devices() - List all USB devices.
 *   open_device()  - Open a USB device...
 */

/*
 * Include necessary headers.
 */

#include "ieee1284.c"
#include <sys/select.h>


/*
 * Local functions...
 */

int	open_device(const char *uri, int *use_bc);


/*
 * 'print_device()' - Print a file to a USB device.
 */

int					/* O - Exit status */
print_device(const char *uri,		/* I - Device URI */
             const char *hostname,	/* I - Hostname/manufacturer */
             const char *resource,	/* I - Resource/modelname */
	     const char *options,	/* I - Device options/serial number */
	     int        print_fd,	/* I - File descriptor to print */
	     int        copies,		/* I - Copies to print */
	     int	argc,		/* I - Number of command-line arguments (6 or 7) */
	     char	*argv[])	/* I - Command-line arguments */
{
  int		use_bc;			/* Use backchannel path? */
  int		device_fd;		/* USB device */
  size_t	tbytes;			/* Total number of bytes written */
  struct termios opts;			/* Parallel port options */


  (void)argc;
  (void)argv;

 /*
  * Open the USB port device...
  */

  fputs("STATE: +connecting-to-device\n", stderr);

  do
  {
   /*
    * Disable backchannel data when printing to Canon USB printers - apparently
    * Canon printers will return the IEEE-1284 device ID over and over and over
    * when they get a read request...
    */

    use_bc = strcasecmp(hostname, "Canon") != 0;

    if ((device_fd = open_device(uri, &use_bc)) == -1)
    {
      if (getenv("CLASS") != NULL)
      {
       /*
        * If the CLASS environment variable is set, the job was submitted
	* to a class and not to a specific queue.  In this case, we want
	* to abort immediately so that the job can be requeued on the next
	* available printer in the class.
	*/

        fputs("INFO: Unable to open USB device, queuing on next printer in class...\n",
	      stderr);

       /*
        * Sleep 5 seconds to keep the job from requeuing too rapidly...
	*/

	sleep(5);

        return (CUPS_BACKEND_FAILED);
      }

      if (errno == EBUSY)
      {
        fputs("INFO: USB port busy; will retry in 30 seconds...\n", stderr);
	sleep(30);
      }
      else if (errno == ENXIO || errno == EIO || errno == ENOENT ||
               errno == ENODEV)
      {
        fputs("INFO: Printer not connected; will retry in 30 seconds...\n", stderr);
	sleep(30);
      }
      else
      {
	fprintf(stderr, "ERROR: Unable to open USB device \"%s\": %s\n",
	        uri, strerror(errno));
	return (CUPS_BACKEND_FAILED);
      }
    }
  }
  while (device_fd < 0);

  fputs("STATE: -connecting-to-device\n", stderr);

 /*
  * Set any options provided...
  */

  tcgetattr(device_fd, &opts);

  opts.c_lflag &= ~(ICANON | ECHO | ISIG);	/* Raw mode */

  /**** No options supported yet ****/

  tcsetattr(device_fd, TCSANOW, &opts);

 /*
  * Finally, send the print file...
  */

  tbytes = 0;

  while (copies > 0 && tbytes >= 0)
  {
    copies --;

    if (print_fd != 0)
    {
      fputs("PAGE: 1 1\n", stderr);
      lseek(print_fd, 0, SEEK_SET);
    }

    tbytes = backendRunLoop(print_fd, device_fd, use_bc);

    if (print_fd != 0 && tbytes >= 0)
      fprintf(stderr, "INFO: Sent print file, " CUPS_LLFMT " bytes...\n",
	      CUPS_LLCAST tbytes);
  }

 /*
  * Close the USB port and return...
  */

  close(device_fd);

  return (tbytes < 0 ? CUPS_BACKEND_FAILED : CUPS_BACKEND_OK);
}


/*
 * 'list_devices()' - List all USB devices.
 */

void
list_devices(void)
{
#ifdef __linux
  int	i;			/* Looping var */
  int	fd;			/* File descriptor */
  char	format[255],		/* Format for device filename */
	device[255],		/* Device filename */
	device_id[1024],	/* Device ID string */
	device_uri[1024],	/* Device URI string */
	make_model[1024];	/* Make and model */


 /*
  * First figure out which USB printer filename to use...
  */

  if (!access("/dev/usblp0", 0))
    strcpy(format, "/dev/usblp%d");
  else if (!access("/dev/usb/usblp0", 0))
    strcpy(format, "/dev/usb/usblp%d");
  else
    strcpy(format, "/dev/usb/lp%d");

 /*
  * Then open each USB device...
  */

  for (i = 0; i < 16; i ++)
  {
    sprintf(device, format, i);

    if ((fd = open(device, O_RDWR | O_EXCL)) >= 0)
    {
      if (!backendGetDeviceID(fd, device_id, sizeof(device_id),
                              make_model, sizeof(make_model),
			      "usb", device_uri, sizeof(device_uri)))
	printf("direct %s \"%s\" \"%s USB #%d\" \"%s\"\n", device_uri,
	       make_model, make_model, i + 1, device_id);

      close(fd);
    }
  }
#elif defined(__sgi)
#elif defined(__sun) && defined(ECPPIOC_GETDEVID)
  int	i;			/* Looping var */
  int	fd;			/* File descriptor */
  char	device[255],		/* Device filename */
	device_id[1024],	/* Device ID string */
	device_uri[1024],	/* Device URI string */
	make_model[1024];	/* Make and model */


 /*
  * Open each USB device...
  */

  for (i = 0; i < 8; i ++)
  {
    sprintf(device, "/dev/usb/printer%d", i);

    if ((fd = open(device, O_WRONLY | O_EXCL)) >= 0)
    {
      if (!backendGetDeviceID(fd, device_id, sizeof(device_id),
                              make_model, sizeof(make_model),
			      "usb", device_uri, sizeof(device_uri)))
	printf("direct %s \"%s\" \"%s USB #%d\" \"%s\"\n", device_uri,
	       make_model, make_model, i + 1, device_id);

      close(fd);
    }
  }
#elif defined(__hpux)
#elif defined(__osf)
#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
  int   i;                      /* Looping var */
  char  device[255];            /* Device filename */


  for (i = 0; i < 8; i ++)
  {
    sprintf(device, "/dev/ulpt%d", i);
    if (!access(device, 0))
      printf("direct usb:%s \"Unknown\" \"USB Printer #%d\"\n", device, i + 1);

    sprintf(device, "/dev/unlpt%d", i);
    if (!access(device, 0))
      printf("direct usb:%s \"Unknown\" \"USB Printer #%d (no reset)\"\n", device, i + 1);
  }
#endif
}


/*
 * 'open_device()' - Open a USB device...
 */

int					/* O - File descriptor or -1 on error */
open_device(const char *uri,		/* I - Device URI */
            int        *use_bc)		/* O - Set to 0 for unidirectional */
{
  int	fd;				/* File descriptor */


 /*
  * The generic implementation just treats the URI as a device filename...
  * Specific operating systems may also support using the device serial
  * number and/or make/model.
  */

  if (!strncmp(uri, "usb:/dev/", 9))
#ifdef __linux
  {
   /*
    * Do not allow direct devices anymore...
    */

    errno = ENODEV;
    return (-1);
  }
  else if (!strncmp(uri, "usb://", 6))
  {
   /*
    * For Linux, try looking up the device serial number or model...
    */

    int		i;			/* Looping var */
    int		busy;			/* Are any ports busy? */
    char	format[255],		/* Format for device filename */
		device[255],		/* Device filename */
		device_id[1024],	/* Device ID string */
		make_model[1024],	/* Make and model */
		device_uri[1024];	/* Device URI string */


   /*
    * First figure out which USB printer filename to use...
    */

    if (!access("/dev/usblp0", 0))
      strcpy(format, "/dev/usblp%d");
    else if (!access("/dev/usb/usblp0", 0))
      strcpy(format, "/dev/usb/usblp%d");
    else
      strcpy(format, "/dev/usb/lp%d");

   /*
    * Then find the correct USB device...
    */

    do
    {
      for (busy = 0, i = 0; i < 16; i ++)
      {
	sprintf(device, format, i);

	if ((fd = open(device, O_RDWR | O_EXCL)) >= 0)
	{
	  backendGetDeviceID(fd, device_id, sizeof(device_id),
                             make_model, sizeof(make_model),
			     "usb", device_uri, sizeof(device_uri));
	}
	else
	{
	 /*
	  * If the open failed because it was busy, flag it so we retry
	  * as needed...
	  */

	  if (errno == EBUSY)
	    busy = 1;

	  device_uri[0] = '\0';
        }

        if (!strcmp(uri, device_uri))
	{
	 /*
	  * Yes, return this file descriptor...
	  */

	  fprintf(stderr, "DEBUG: Printer using device file \"%s\"...\n", device);

	  return (fd);
	}

       /*
	* This wasn't the one...
	*/

        if (fd >= 0)
	  close(fd);
      }

     /*
      * If we get here and at least one of the printer ports showed up
      * as "busy", then sleep for a bit and retry...
      */

      if (busy)
      {
	fputs("INFO: USB printer is busy; will retry in 5 seconds...\n",
	      stderr);
	sleep(5);
      }
    }
    while (busy);

   /*
    * Couldn't find the printer, return "no such device or address"...
    */

    errno = ENODEV;

    return (-1);
  }
#elif defined(__sun) && defined(ECPPIOC_GETDEVID)
  {
   /*
    * Do not allow direct devices anymore...
    */

    errno = ENODEV;
    return (-1);
  }
  else if (!strncmp(uri, "usb://", 6))
  {
   /*
    * For Solaris, try looking up the device serial number or model...
    */

    int		i;			/* Looping var */
    int		busy;			/* Are any ports busy? */
    char	device[255],		/* Device filename */
		device_id[1024],	/* Device ID string */
		make_model[1024],	/* Make and model */
		device_uri[1024];	/* Device URI string */


   /*
    * Find the correct USB device...
    */

    do
    {
      for (i = 0, busy = 0; i < 8; i ++)
      {
	sprintf(device, "/dev/usb/printer%d", i);

	if ((fd = open(device, O_WRONLY | O_EXCL)) >= 0)
	  backendGetDeviceID(fd, device_id, sizeof(device_id),
                             make_model, sizeof(make_model),
			     "usb", device_uri, sizeof(device_uri));
	else
	{
	 /*
	  * If the open failed because it was busy, flag it so we retry
	  * as needed...
	  */

	  if (errno == EBUSY)
	    busy = 1;

	  device_uri[0] = '\0';
        }

        if (!strcmp(uri, device_uri))
	{
	 /*
	  * Yes, return this file descriptor...
	  */

          fputs("DEBUG: Setting use_bc to 0!\n", stderr);

          *use_bc = 0;

	  return (fd);
	}

       /*
	* This wasn't the one...
	*/

        if (fd >= 0)
	  close(fd);
      }

     /*
      * If we get here and at least one of the printer ports showed up
      * as "busy", then sleep for a bit and retry...
      */

      if (busy)
      {
	fputs("INFO: USB printer is busy; will retry in 5 seconds...\n",
	      stderr);
	sleep(5);
      }
    }
    while (busy);

   /*
    * Couldn't find the printer, return "no such device or address"...
    */

    errno = ENODEV;

    return (-1);
  }
#else
  {
    if ((fd = open(uri + 4, O_RDWR | O_EXCL)) < 0)
    {
      fd      = open(uri + 4, O_WRONLY | O_EXCL);
      *use_bc = 0;
    }

    return (fd);
  }
#endif /* __linux */
  else
  {
    errno = ENODEV;
    return (-1);
  }
}


/*
 * End of "$Id$".
 */
Commit	Line	Data
8e3807e7	1	/*
c9d3f842	2	* "$Id$"
8e3807e7	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	*
766ef83d	8	* Copyright 1997-2006 by Easy Software Products, all rights reserved.
8e3807e7	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
c9d3f842	20	* Hollywood, Maryland 20636 USA
8e3807e7	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	*
74584961	30	* print_device() - Print a file to a USB device.
8e3807e7	31	* list_devices() - List all USB devices.
74584961	32	* open_device() - Open a USB device...
8e3807e7	33	*/
	34
	35	/*
	36	* Include necessary headers.
	37	*/
	38
9ef960f1	39	#include "ieee1284.c"
5baa731f	40	#include <sys/select.h>
5baa731f	41
8e3807e7	42
	43	/*
	44	* Local functions...
	45	*/
	46
acc0a9db	47	int open_device(const char uri, int use_bc);
8e3807e7	48
	49
	50	/*
	51	* 'print_device()' - Print a file to a USB device.
	52	*/
	53
	54	int /* O - Exit status */
	55	print_device(const char uri, / I - Device URI */
	56	const char hostname, / I - Hostname/manufacturer */
	57	const char resource, / I - Resource/modelname */
	58	const char options, / I - Device options/serial number */
43b5ad0d	59	int print_fd, /* I - File descriptor to print */
7e826c4a	60	int copies, /* I - Copies to print */
	61	int argc, /* I - Number of command-line arguments (6 or 7) */
	62	char argv[]) / I - Command-line arguments */
8e3807e7	63	{
43b5ad0d	64	int use_bc; /* Use backchannel path? */
	65	int device_fd; /* USB device */
	66	size_t tbytes; /* Total number of bytes written */
8e3807e7	67	struct termios opts; /* Parallel port options */
43b5ad0d	68
8e3807e7	69
7e826c4a	70	(void)argc;
7e826c4a	71	(void)argv;
8e3807e7	72
	73	/*
	74	* Open the USB port device...
	75	*/
	76
22a980cc	77	fputs("STATE: +connecting-to-device\n", stderr);
22a980cc	78
8e3807e7	79	do
8e3807e7	80	{
acc0a9db	81	/*
	82	* Disable backchannel data when printing to Canon USB printers - apparently
	83	* Canon printers will return the IEEE-1284 device ID over and over and over
	84	* when they get a read request...
	85	*/
	86
	87	use_bc = strcasecmp(hostname, "Canon") != 0;
	88
	89	if ((device_fd = open_device(uri, &use_bc)) == -1)
8e3807e7	90	{
b7b63780	91	if (getenv("CLASS") != NULL)
	92	{
	93	/*
	94	* If the CLASS environment variable is set, the job was submitted
	95	* to a class and not to a specific queue. In this case, we want
	96	* to abort immediately so that the job can be requeued on the next
	97	* available printer in the class.
	98	*/
	99
	100	fputs("INFO: Unable to open USB device, queuing on next printer in class...\n",
	101	stderr);
	102
	103	/*
	104	* Sleep 5 seconds to keep the job from requeuing too rapidly...
	105	*/
	106
	107	sleep(5);
	108
6248387b	109	return (CUPS_BACKEND_FAILED);
b7b63780	110	}
b7b63780	111
8e3807e7	112	if (errno == EBUSY)
	113	{
	114	fputs("INFO: USB port busy; will retry in 30 seconds...\n", stderr);
	115	sleep(30);
	116	}
43b5ad0d	117	else if (errno == ENXIO \|\| errno == EIO \|\| errno == ENOENT \|\|
43b5ad0d	118	errno == ENODEV)
8e3807e7	119	{
	120	fputs("INFO: Printer not connected; will retry in 30 seconds...\n", stderr);
	121	sleep(30);
	122	}
	123	else
	124	{
	125	fprintf(stderr, "ERROR: Unable to open USB device \"%s\": %s\n",
	126	uri, strerror(errno));
6248387b	127	return (CUPS_BACKEND_FAILED);
8e3807e7	128	}
	129	}
	130	}
43b5ad0d	131	while (device_fd < 0);
8e3807e7	132
22a980cc	133	fputs("STATE: -connecting-to-device\n", stderr);
22a980cc	134
8e3807e7	135	/*
	136	* Set any options provided...
	137	*/
	138
43b5ad0d	139	tcgetattr(device_fd, &opts);
8e3807e7	140
	141	opts.c_lflag &= ~(ICANON \| ECHO \| ISIG); /* Raw mode */
	142
	143	/** No options supported yet **/
	144
43b5ad0d	145	tcsetattr(device_fd, TCSANOW, &opts);
9ef960f1	146
8e3807e7	147	/*
	148	* Finally, send the print file...
	149	*/
	150
43b5ad0d	151	tbytes = 0;
897922a9	152
43b5ad0d	153	while (copies > 0 && tbytes >= 0)
8e3807e7	154	{
	155	copies --;
	156
43b5ad0d	157	if (print_fd != 0)
8e3807e7	158	{
8e3807e7	159	fputs("PAGE: 1 1\n", stderr);
43b5ad0d	160	lseek(print_fd, 0, SEEK_SET);
8e3807e7	161	}
8e3807e7	162
acc0a9db	163	tbytes = backendRunLoop(print_fd, device_fd, use_bc);
8e3807e7	164
43b5ad0d	165	if (print_fd != 0 && tbytes >= 0)
	166	fprintf(stderr, "INFO: Sent print file, " CUPS_LLFMT " bytes...\n",
	167	CUPS_LLCAST tbytes);
8e3807e7	168	}
	169
	170	/*
	171	* Close the USB port and return...
	172	*/
	173
43b5ad0d	174	close(device_fd);
8e3807e7	175
43b5ad0d	176	return (tbytes < 0 ? CUPS_BACKEND_FAILED : CUPS_BACKEND_OK);
8e3807e7	177	}
	178
	179
8e3807e7	180	/*
	181	* 'list_devices()' - List all USB devices.
	182	*/
	183
	184	void
	185	list_devices(void)
	186	{
	187	#ifdef __linux
	188	int i; /* Looping var */
8e3807e7	189	int fd; /* File descriptor */
	190	char format[255], /* Format for device filename */
	191	device[255], /* Device filename */
	192	device_id[1024], /* Device ID string */
	193	device_uri[1024], /* Device URI string */
	194	make_model[1024]; /* Make and model */
	195
	196
	197	/*
	198	* First figure out which USB printer filename to use...
	199	*/
	200
9ef960f1	201	if (!access("/dev/usblp0", 0))
6f96d00f	202	strcpy(format, "/dev/usblp%d");
9ef960f1	203	else if (!access("/dev/usb/usblp0", 0))
8e3807e7	204	strcpy(format, "/dev/usb/usblp%d");
8e3807e7	205	else
6f96d00f	206	strcpy(format, "/dev/usb/lp%d");
8e3807e7	207
	208	/*
	209	* Then open each USB device...
	210	*/
	211
	212	for (i = 0; i < 16; i ++)
	213	{
	214	sprintf(device, format, i);
	215
	216	if ((fd = open(device, O_RDWR \| O_EXCL)) >= 0)
	217	{
43b5ad0d	218	if (!backendGetDeviceID(fd, device_id, sizeof(device_id),
	219	make_model, sizeof(make_model),
	220	"usb", device_uri, sizeof(device_uri)))
9ef960f1	221	printf("direct %s \"%s\" \"%s USB #%d\" \"%s\"\n", device_uri,
9ef960f1	222	make_model, make_model, i + 1, device_id);
8e3807e7	223
	224	close(fd);
	225	}
8e3807e7	226	}
8e3807e7	227	#elif defined(__sgi)
74ef1ffb	228	#elif defined(__sun) && defined(ECPPIOC_GETDEVID)
8e3807e7	229	int i; /* Looping var */
	230	int fd; /* File descriptor */
	231	char device[255], /* Device filename */
	232	device_id[1024], /* Device ID string */
	233	device_uri[1024], /* Device URI string */
	234	make_model[1024]; /* Make and model */
8e3807e7	235
	236
	237	/*
	238	* Open each USB device...
	239	*/
	240
	241	for (i = 0; i < 8; i ++)
	242	{
	243	sprintf(device, "/dev/usb/printer%d", i);
	244
acc0a9db	245	if ((fd = open(device, O_WRONLY \| O_EXCL)) >= 0)
8e3807e7	246	{
43b5ad0d	247	if (!backendGetDeviceID(fd, device_id, sizeof(device_id),
	248	make_model, sizeof(make_model),
	249	"usb", device_uri, sizeof(device_uri)))
9ef960f1	250	printf("direct %s \"%s\" \"%s USB #%d\" \"%s\"\n", device_uri,
9ef960f1	251	make_model, make_model, i + 1, device_id);
8e3807e7	252
	253	close(fd);
	254	}
8e3807e7	255	}
	256	#elif defined(__hpux)
	257	#elif defined(__osf)
fe688a06	258	#elif defined(__FreeBSD__) \|\| defined(__NetBSD__) \|\| defined(__OpenBSD__) \|\| defined(__DragonFly__)
8e3807e7	259	int i; /* Looping var */
	260	char device[255]; /* Device filename */
	261
	262
	263	for (i = 0; i < 8; i ++)
	264	{
	265	sprintf(device, "/dev/ulpt%d", i);
	266	if (!access(device, 0))
	267	printf("direct usb:%s \"Unknown\" \"USB Printer #%d\"\n", device, i + 1);
	268
	269	sprintf(device, "/dev/unlpt%d", i);
	270	if (!access(device, 0))
	271	printf("direct usb:%s \"Unknown\" \"USB Printer #%d (no reset)\"\n", device, i + 1);
	272	}
	273	#endif
	274	}
	275
	276
	277	/*
	278	* 'open_device()' - Open a USB device...
	279	*/
	280
	281	int /* O - File descriptor or -1 on error */
acc0a9db	282	open_device(const char uri, / I - Device URI */
acc0a9db	283	int use_bc) / O - Set to 0 for unidirectional */
8e3807e7	284	{
acc0a9db	285	int fd; /* File descriptor */
	286
	287
8e3807e7	288	/*
	289	* The generic implementation just treats the URI as a device filename...
	290	* Specific operating systems may also support using the device serial
	291	* number and/or make/model.
	292	*/
	293
9ef960f1	294	if (!strncmp(uri, "usb:/dev/", 9))
8e3807e7	295	#ifdef __linux
74584961	296	{
	297	/*
	298	* Do not allow direct devices anymore...
	299	*/
	300
	301	errno = ENODEV;
	302	return (-1);
	303	}
9ef960f1	304	else if (!strncmp(uri, "usb://", 6))
8e3807e7	305	{
	306	/*
	307	* For Linux, try looking up the device serial number or model...
	308	*/
	309
	310	int i; /* Looping var */
	311	int busy; /* Are any ports busy? */
8e3807e7	312	char format[255], /* Format for device filename */
	313	device[255], /* Device filename */
	314	device_id[1024], /* Device ID string */
	315	make_model[1024], /* Make and model */
	316	device_uri[1024]; /* Device URI string */
	317
	318
	319	/*
	320	* First figure out which USB printer filename to use...
	321	*/
	322
9ef960f1	323	if (!access("/dev/usblp0", 0))
6f96d00f	324	strcpy(format, "/dev/usblp%d");
9ef960f1	325	else if (!access("/dev/usb/usblp0", 0))
8e3807e7	326	strcpy(format, "/dev/usb/usblp%d");
8e3807e7	327	else
6f96d00f	328	strcpy(format, "/dev/usb/lp%d");
8e3807e7	329
	330	/*
	331	* Then find the correct USB device...
	332	*/
	333
	334	do
	335	{
	336	for (busy = 0, i = 0; i < 16; i ++)
	337	{
	338	sprintf(device, format, i);
	339
	340	if ((fd = open(device, O_RDWR \| O_EXCL)) >= 0)
	341	{
43b5ad0d	342	backendGetDeviceID(fd, device_id, sizeof(device_id),
	343	make_model, sizeof(make_model),
	344	"usb", device_uri, sizeof(device_uri));
8e3807e7	345	}
	346	else
	347	{
	348	/*
	349	* If the open failed because it was busy, flag it so we retry
	350	* as needed...
	351	*/
	352
	353	if (errno == EBUSY)
	354	busy = 1;
	355
9ef960f1	356	device_uri[0] = '\0';
8e3807e7	357	}
8e3807e7	358
9ef960f1	359	if (!strcmp(uri, device_uri))
8e3807e7	360	{
8e3807e7	361	/*
9ef960f1	362	* Yes, return this file descriptor...
8e3807e7	363	*/
8e3807e7	364
9ef960f1	365	fprintf(stderr, "DEBUG: Printer using device file \"%s\"...\n", device);
8e3807e7	366
9ef960f1	367	return (fd);
8e3807e7	368	}
	369
	370	/*
	371	* This wasn't the one...
	372	*/
	373
	374	if (fd >= 0)
	375	close(fd);
	376	}
	377
	378	/*
	379	* If we get here and at least one of the printer ports showed up
	380	* as "busy", then sleep for a bit and retry...
	381	*/
	382
	383	if (busy)
	384	{
	385	fputs("INFO: USB printer is busy; will retry in 5 seconds...\n",
	386	stderr);
	387	sleep(5);
	388	}
	389	}
	390	while (busy);
	391
	392	/*
	393	* Couldn't find the printer, return "no such device or address"...
	394	*/
	395
	396	errno = ENODEV;
	397
	398	return (-1);
	399	}
	400	#elif defined(__sun) && defined(ECPPIOC_GETDEVID)
74584961	401	{
	402	/*
	403	* Do not allow direct devices anymore...
	404	*/
	405
	406	errno = ENODEV;
	407	return (-1);
	408	}
9ef960f1	409	else if (!strncmp(uri, "usb://", 6))
8e3807e7	410	{
	411	/*
	412	* For Solaris, try looking up the device serial number or model...
	413	*/
	414
	415	int i; /* Looping var */
	416	int busy; /* Are any ports busy? */
8e3807e7	417	char device[255], /* Device filename */
	418	device_id[1024], /* Device ID string */
	419	make_model[1024], /* Make and model */
	420	device_uri[1024]; /* Device URI string */
8e3807e7	421
	422
	423	/*
	424	* Find the correct USB device...
	425	*/
	426
	427	do
	428	{
63412dfd	429	for (i = 0, busy = 0; i < 8; i ++)
8e3807e7	430	{
	431	sprintf(device, "/dev/usb/printer%d", i);
	432
acc0a9db	433	if ((fd = open(device, O_WRONLY \| O_EXCL)) >= 0)
43b5ad0d	434	backendGetDeviceID(fd, device_id, sizeof(device_id),
	435	make_model, sizeof(make_model),
	436	"usb", device_uri, sizeof(device_uri));
8e3807e7	437	else
	438	{
	439	/*
	440	* If the open failed because it was busy, flag it so we retry
	441	* as needed...
	442	*/
	443
	444	if (errno == EBUSY)
	445	busy = 1;
	446
9ef960f1	447	device_uri[0] = '\0';
8e3807e7	448	}
8e3807e7	449
9ef960f1	450	if (!strcmp(uri, device_uri))
acc0a9db	451	{
	452	/*
	453	* Yes, return this file descriptor...
	454	*/
	455
	456	fputs("DEBUG: Setting use_bc to 0!\n", stderr);
	457
	458	*use_bc = 0;
	459
	460	return (fd);
	461	}
8e3807e7	462
	463	/*
	464	* This wasn't the one...
	465	*/
	466
	467	if (fd >= 0)
	468	close(fd);
	469	}
	470
	471	/*
	472	* If we get here and at least one of the printer ports showed up
	473	* as "busy", then sleep for a bit and retry...
	474	*/
	475
	476	if (busy)
	477	{
	478	fputs("INFO: USB printer is busy; will retry in 5 seconds...\n",
	479	stderr);
	480	sleep(5);
	481	}
	482	}
	483	while (busy);
	484
	485	/*
	486	* Couldn't find the printer, return "no such device or address"...
	487	*/
	488
	489	errno = ENODEV;
	490
	491	return (-1);
	492	}
d4102150	493	#else
acc0a9db	494	{
	495	if ((fd = open(uri + 4, O_RDWR \| O_EXCL)) < 0)
	496	{
	497	fd = open(uri + 4, O_WRONLY \| O_EXCL);
	498	*use_bc = 0;
	499	}
	500
	501	return (fd);
	502	}
d4102150	503	#endif /* __linux */
8e3807e7	504	else
	505	{
	506	errno = ENODEV;
	507	return (-1);
	508	}
	509	}
	510
	511
	512	/*
c9d3f842	513	* End of "$Id$".
8e3807e7	514	*/