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/***************************************************************************
* CVSID: $Id$
*
* hal_find_by_capability.c : Find hal devices
*
* Copyright (C) 2005 David Zeuthen, <david@fubar.dk>
*
* Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
**************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include <libhal.h>
/**
* usage:
* @argc: Number of arguments given to program
* @argv: Arguments given to program
*
* Print out program usage.
*/
static void
usage (int argc, char *argv[])
{
fprintf (stderr,
"\n"
"usage : hal-find-by-capability --capability <capability>\n"
" [--help] [--verbose] [--version]\n");
fprintf (stderr,
"\n"
" --capability HAL Device Capability to search for\n"
" --verbose Be verbose\n"
" --version Show version and exit\n"
" --help Show this information and exit\n"
"\n"
"This program prints the Unique Device Identifiers for HAL device\n"
"objects of a given capability on stdout and exits with exit code 0\n"
"If there is an error, the program exits with an exit code different\n"
"from 0.\n"
"\n");
}
/**
* main:
* @argc: Number of arguments given to program
* @argv: Arguments given to program
*
* Returns: Return code
*
* Main entry point
*/
int
main (int argc, char *argv[])
{
int i;
int num_udis;
char **udis;
char *capability = NULL;
dbus_bool_t is_verbose = FALSE;
dbus_bool_t is_version = FALSE;
DBusError error;
LibHalContext *hal_ctx;
if (argc <= 1) {
usage (argc, argv);
return 1;
}
while (1) {
int c;
int option_index = 0;
const char *opt;
static struct option long_options[] = {
{"capability", 1, NULL, 0},
{"verbose", 0, NULL, 0},
{"version", 0, NULL, 0},
{"help", 0, NULL, 0},
{NULL, 0, NULL, 0}
};
c = getopt_long (argc, argv, "",
long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 0:
opt = long_options[option_index].name;
if (strcmp (opt, "help") == 0) {
usage (argc, argv);
return 0;
} else if (strcmp (opt, "verbose") == 0) {
is_verbose = TRUE;
} else if (strcmp (opt, "version") == 0) {
is_version = TRUE;
} else if (strcmp (opt, "capability") == 0) {
capability = strdup (optarg);
}
break;
default:
usage (argc, argv);
return 1;
break;
}
}
if (is_version) {
printf ("hal-find-by-capability " PACKAGE_VERSION "\n");
return 0;
}
if (capability == NULL) {
usage (argc, argv);
return 1;
}
dbus_error_init (&error);
if ((hal_ctx = libhal_ctx_new ()) == NULL) {
fprintf (stderr, "error: libhal_ctx_new\n");
LIBHAL_FREE_DBUS_ERROR (&error);
return 1;
}
if (!libhal_ctx_set_dbus_connection (hal_ctx, dbus_bus_get (DBUS_BUS_SYSTEM, &error))) {
fprintf (stderr, "error: libhal_ctx_set_dbus_connection: %s: %s\n", error.name, error.message);
LIBHAL_FREE_DBUS_ERROR (&error);
return 1;
}
if (!libhal_ctx_init (hal_ctx, &error)) {
if (dbus_error_is_set(&error)) {
fprintf (stderr, "error: libhal_ctx_init: %s: %s\n", error.name, error.message);
LIBHAL_FREE_DBUS_ERROR (&error);
}
fprintf (stderr, "Could not initialise connection to hald.\n"
"Normally this means the HAL daemon (hald) is not running or not ready.\n");
return 1;
}
udis = libhal_find_device_by_capability (hal_ctx, capability, &num_udis, &error);
if (dbus_error_is_set (&error)) {
fprintf (stderr, "error: %s: %s\n", error.name, error.message);
LIBHAL_FREE_DBUS_ERROR (&error);
return 1;
}
if (is_verbose)
printf ("Found %d device objects of capability '%s'\n", num_udis, capability);
if (num_udis == 0) {
return 1;
}
for (i = 0; i < num_udis; i++) {
printf ("%s\n", udis[i]);
}
libhal_free_string_array (udis);
return 0;
}
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