cups/backend.c

   1 /*
   2  * "$Id: backend.c 6649 2007-07-11 21:46:42Z mike $"
   3  *
   4  *   Backend functions for the Common UNIX Printing System (CUPS).
   5  *
   6  *   Copyright 2007-2008 by Apple Inc.
   7  *   Copyright 2006 by Easy Software Products.
   8  *
   9  *   These coded instructions, statements, and computer programs are the
  10  *   property of Apple Inc. and are protected by Federal copyright
  11  *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12  *   which should have been included with this file.  If this file is
  13  *   file is missing or damaged, see the license at "http://www.cups.org/".
  14  *
  15  *   This file is subject to the Apple OS-Developed Software exception.
  16  *
  17  * Contents:
  18  *
  19  *   cupsBackendDeviceURI() - Get the device URI for a backend.
  20  */
  21
  22 /*
  23  * Include necessary headers...
  24  */
  25
  26 #include <stdlib.h>
  27 #include "backend.h"
  28 #include "string.h"
  29
  30
  31 /*
  32  * 'cupsBackendDeviceURI()' - Get the device URI for a backend.
  33  *
  34  * The "argv" argument is the argv argument passed to main(). This
  35  * function returns the device URI passed in the DEVICE_URI environment
  36  * variable or the device URI passed in argv[0], whichever is found
  37  * first.
  38  */
  39
  40 const char *                            /* O - Device URI or @code NULL@ */
  41 cupsBackendDeviceURI(char **argv)       /* I - Command-line arguments */
  42 {
  43   const char    *device_uri;            /* Device URI */
  44
  45
  46   if ((device_uri = getenv("DEVICE_URI")) != NULL)
  47     return (device_uri);
  48
  49   if (!argv || !argv[0] || !strchr(argv[0], ':'))
  50     return (NULL);
  51   else
  52     return (argv[0]);
  53 }
  54
  55
  56 /*
  57  * End of "$Id: backend.c 6649 2007-07-11 21:46:42Z mike $".
  58  */