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/*
* Backend functions for CUPS.
*
* Copyright 2007-2015 by Apple Inc.
* Copyright 2006 by Easy Software Products.
*
* Licensed under Apache License v2.0. See the file "LICENSE" for more information.
*/
/*
* Include necessary headers...
*/
#include "cups-private.h"
#include "backend.h"
#include "ppd.h"
/*
* Local functions...
*/
static void quote_string(const char *s);
/*
* 'cupsBackendDeviceURI()' - Get the device URI for a backend.
*
* The "argv" argument is the argv argument passed to main(). This
* function returns the device URI passed in the DEVICE_URI environment
* variable or the device URI passed in argv[0], whichever is found
* first.
*
* @since CUPS 1.2/macOS 10.5@
*/
const char * /* O - Device URI or @code NULL@ */
cupsBackendDeviceURI(char **argv) /* I - Command-line arguments */
{
const char *device_uri, /* Device URI */
*auth_info_required; /* AUTH_INFO_REQUIRED env var */
_cups_globals_t *cg = _cupsGlobals(); /* Global info */
int options; /* Resolve options */
ppd_file_t *ppd; /* PPD file */
ppd_attr_t *ppdattr; /* PPD attribute */
if ((device_uri = getenv("DEVICE_URI")) == NULL)
{
if (!argv || !argv[0] || !strchr(argv[0], ':'))
return (NULL);
device_uri = argv[0];
}
options = _HTTP_RESOLVE_STDERR;
if ((auth_info_required = getenv("AUTH_INFO_REQUIRED")) != NULL &&
!strcmp(auth_info_required, "negotiate"))
options |= _HTTP_RESOLVE_FQDN;
if ((ppd = ppdOpenFile(getenv("PPD"))) != NULL)
{
if ((ppdattr = ppdFindAttr(ppd, "cupsIPPFaxOut", NULL)) != NULL &&
!_cups_strcasecmp(ppdattr->value, "true"))
options |= _HTTP_RESOLVE_FAXOUT;
ppdClose(ppd);
}
return (_httpResolveURI(device_uri, cg->resolved_uri,
sizeof(cg->resolved_uri), options, NULL, NULL));
}
/*
* 'cupsBackendReport()' - Write a device line from a backend.
*
* This function writes a single device line to stdout for a backend.
* It handles quoting of special characters in the device-make-and-model,
* device-info, device-id, and device-location strings.
*
* @since CUPS 1.4/macOS 10.6@
*/
void
cupsBackendReport(
const char *device_scheme, /* I - device-scheme string */
const char *device_uri, /* I - device-uri string */
const char *device_make_and_model, /* I - device-make-and-model string or @code NULL@ */
const char *device_info, /* I - device-info string or @code NULL@ */
const char *device_id, /* I - device-id string or @code NULL@ */
const char *device_location) /* I - device-location string or @code NULL@ */
{
if (!device_scheme || !device_uri)
return;
printf("%s %s", device_scheme, device_uri);
if (device_make_and_model && *device_make_and_model)
quote_string(device_make_and_model);
else
quote_string("unknown");
quote_string(device_info);
quote_string(device_id);
quote_string(device_location);
putchar('\n');
fflush(stdout);
}
/*
* 'quote_string()' - Write a quoted string to stdout, escaping \ and ".
*/
static void
quote_string(const char *s) /* I - String to write */
{
fputs(" \"", stdout);
if (s)
{
while (*s)
{
if (*s == '\\' || *s == '\"')
putchar('\\');
if (((*s & 255) < ' ' && *s != '\t') || *s == 0x7f)
putchar(' ');
else
putchar(*s);
s ++;
}
}
putchar('\"');
}
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