cups/backend.c

   1 /*
   2  * "$Id: backend.c 5024 2006-01-29 14:58:15Z mike $"
   3  *
   4  *   Backend functions for the Common UNIX Printing System (CUPS).
   5  *
   6  *   Copyright 2006 by Easy Software Products.
   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.txt" 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  *   cupsBackendDeviceURI() - Get the device URI for a backend.
  29  */
  30
  31 /*
  32  * Include necessary headers...
  33  */
  34
  35 #include <stdlib.h>
  36 #include "backend.h"
  37 #include "string.h"
  38
  39
  40 /*
  41  * 'cupsBackendDeviceURI()' - Get the device URI for a backend.
  42  *
  43  * The "argv" argument is the argv argument passed to main(). This
  44  * function returns the device URI passed in the DEVICE_URI environment
  45  * variable or the device URI passed in argv[0], whichever is found
  46  * first.
  47  */
  48
  49 const char *                            /* O - Device URI or NULL */
  50 cupsBackendDeviceURI(char **argv)       /* I - Command-line arguments */
  51 {
  52   const char    *device_uri;            /* Device URI */
  53
  54
  55   if ((device_uri = getenv("DEVICE_URI")) != NULL)
  56     return (device_uri);
  57
  58   if (!argv || !argv[0] || !strchr(argv[0], ':'))
  59     return (NULL);
  60   else
  61     return (argv[0]);
  62 }
  63
  64
  65 /*
  66  * End of "$Id: backend.c 5024 2006-01-29 14:58:15Z mike $".
  67  */