OpenSolaris_b135/cmd/hal/tools/hal_get_property.c
/***************************************************************************
* CVSID: $Id$
*
* hal_get_property.c : Get property for a device
*
* Copyright (C) 2003 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>
/**
* @defgroup HalGetProperty Get HAL device property
* @ingroup HalMisc
*
* @brief A commandline tool getting a property of a device. Uses libhal
*
* @{
*/
static LibHalContext *hal_ctx;
/** Print out program usage.
*
* @param argc Number of arguments given to program
* @param argv Arguments given to program
*/
static void
usage (int argc, char *argv[])
{
fprintf (stderr,
"\n"
"usage : hal-get-property --udi <udi> --key <key> \n"
" [--hex] [--help] [--verbose] [--version]\n");
fprintf (stderr,
"\n"
" --udi Unique Device Id\n"
" --key Key of the property to get\n"
" --hex Show integer values in hex (without leading 0x)\n"
" --verbose Be verbose\n"
" --version Show version and exit\n"
" --help Show this information and exit\n"
"\n"
"This program retrieves a property from a device. If the property exist\n"
"then it is printed on stdout and this program exits with exit code 0.\n"
"On error, the program exits with an exit code different from 0\n"
"\n");
}
/** Entry point
*
* @param argc Number of arguments given to program
* @param argv Arguments given to program
* @return Return code
*/
int
main (int argc, char *argv[])
{
char *udi = NULL;
char *key = NULL;
int type;
dbus_bool_t is_hex = FALSE;
dbus_bool_t is_verbose = FALSE;
dbus_bool_t is_version = FALSE;
dbus_bool_t udi_exists = FALSE;
char *str;
DBusError error;
if (argc <= 1) {
usage (argc, argv);
return 1;
}
while (1) {
int c;
int option_index = 0;
const char *opt;
static struct option long_options[] = {
{"udi", 1, NULL, 0},
{"key", 1, NULL, 0},
{"hex", 0, 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, "hex") == 0) {
is_hex = TRUE;
} else if (strcmp (opt, "verbose") == 0) {
is_verbose = TRUE;
} else if (strcmp (opt, "version") == 0) {
is_version = TRUE;
} else if (strcmp (opt, "key") == 0) {
key = strdup (optarg);
} else if (strcmp (opt, "udi") == 0) {
udi = strdup (optarg);
}
break;
default:
usage (argc, argv);
return 1;
break;
}
}
if (is_version) {
printf ("hal-get-property " PACKAGE_VERSION "\n");
return 0;
}
if (udi == NULL || key == NULL) {
usage (argc, argv);
return 1;
}
dbus_error_init (&error);
if ((hal_ctx = libhal_ctx_new ()) == NULL) {
fprintf (stderr, "error: libhal_ctx_new\n");
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);
dbus_error_free (&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;
}
/* check UDI exists */
udi_exists = libhal_device_exists (hal_ctx, udi, &error);
if (!udi_exists) {
fprintf (stderr, "error: UDI %s does not exist\n", udi);
return 1;
}
if (dbus_error_is_set(&error)) {
fprintf (stderr, "error: libhal_device_exists: %s: %s\n", error.name, error.message);
dbus_error_free (&error);
return 1;
}
type = libhal_device_get_property_type (hal_ctx, udi, key, &error);
if (type == LIBHAL_PROPERTY_TYPE_INVALID) {
if (dbus_error_is_set(&error)) {
fprintf (stderr, "error: libhal_device_get_property_type: %s: %s\n", error.name, error.message);
dbus_error_free (&error);
} else {
fprintf (stderr, "error: libhal_device_get_property_type: invalid params.\n");
}
return 1;
}
/* emit the value to stdout */
switch (type) {
case LIBHAL_PROPERTY_TYPE_STRING:
str = libhal_device_get_property_string (hal_ctx, udi, key, &error);
if (is_verbose)
printf ("Type is string\n");
printf ("%s\n", str);
libhal_free_string (str);
break;
case LIBHAL_PROPERTY_TYPE_INT32:
if (is_verbose)
printf ("Type is integer (shown in %s)\n",
(is_hex ? "hexadecimal" : "decimal"));
printf ((is_hex ? "%x\n" : "%d\n"),
libhal_device_get_property_int (hal_ctx, udi, key, &error));
break;
case LIBHAL_PROPERTY_TYPE_UINT64:
if (is_verbose)
printf ("Type is uint64 (shown in %s)\n",
(is_hex ? "hexadecimal" : "decimal"));
printf ((is_hex ? "%llx\n" : "%llu\n"),
(long long unsigned int) libhal_device_get_property_uint64 (hal_ctx, udi, key, &error));
break;
case LIBHAL_PROPERTY_TYPE_DOUBLE:
if (is_verbose)
printf ("Type is double\n");
printf ("%f\n",
libhal_device_get_property_double (hal_ctx, udi, key, &error));
break;
case LIBHAL_PROPERTY_TYPE_BOOLEAN:
if (is_verbose)
printf ("Type is boolean\n");
printf ("%s\n",
libhal_device_get_property_bool (hal_ctx, udi, key, &error) ? "true" : "false");
break;
case LIBHAL_PROPERTY_TYPE_STRLIST:
{
unsigned int i;
char **strlist;
if ((strlist = libhal_device_get_property_strlist (hal_ctx, udi, key, &error)) != NULL) {
for (i = 0; strlist[i] != 0; i++) {
printf ("%s", strlist[i]);
if (strlist[i+1] != NULL)
printf (" ");
}
}
break;
}
default:
printf ("Unknown type %d='%c'\n", type, type);
return 1;
break;
}
if (dbus_error_is_set (&error)) {
fprintf (stderr, "error: %s: %s\n", error.name, error.message);
dbus_error_free (&error);
return 1;
}
return 0;
}
/**
* @}
*/