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/*
* Authors: Martin Nagy <mnagy@redhat.com>
*
* Copyright (C) 2009 Red Hat
* see file 'COPYING' for use and warranty information
*
* 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; version 2 or later
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <isc/util.h>
#include <isc/mem.h>
#include <isc/result.h>
#include <ctype.h>
#include <stdlib.h>
#include "log.h"
#include "settings.h"
#include "str.h"
#include "util.h"
/*
* Forward declarations.
*/
static int args_are_equal(const char *setting_argument,
const char *argv_argument);
static isc_result_t set_value(setting_t *setting, const char *value);
static isc_result_t set_default_value(setting_t *setting);
static const char * get_value_str(const char *arg);
isc_result_t
set_settings(setting_t settings[], const char * const* argv)
{
isc_result_t result;
int i, j;
const char *value;
for (i = 0; argv[i] != NULL; i++) {
for (j = 0; settings[j].name != NULL; j++) {
if (args_are_equal(settings[j].name, argv[i])) {
value = get_value_str(argv[i]);
CHECK(set_value(&settings[j], value));
break;
}
}
}
/* When all is done, check that all the required settings are set. */
for (j = 0; settings[j].name != NULL; j++) {
if (settings[j].set != 0)
continue;
if (!settings[j].has_a_default) {
log_error("argument %s must be set", settings[j].name);
result = ISC_R_FAILURE;
goto cleanup;
}
CHECK(set_default_value(&settings[j]));
}
return ISC_R_SUCCESS;
cleanup:
/* TODO: Free memory in case of error. */
return result;
}
/*
* Return 1 if the argument names are equal. The argv_argument also needs to
* contain an additional space at the end.
*/
static int
args_are_equal(const char *setting_argument, const char *argv_argument)
{
if (setting_argument == NULL || argv_argument == NULL)
return 0;
for (;;) {
if (*setting_argument == '\0')
break;
if (*argv_argument == '\0')
return 0;
if (*setting_argument != *argv_argument)
return 0;
setting_argument++;
argv_argument++;
}
/* Now make sure we also found a space at the end of argv_argument. */
if (!isspace(*argv_argument) && *argv_argument != '\0')
return 0;
return 1;
}
static isc_result_t
set_value(setting_t *setting, const char *value)
{
isc_result_t result;
int numeric_value;
if (setting->type == ST_LD_STRING) {
CHECK(str_init_char((ld_string_t *)setting->target, value));
} else if (setting->type == ST_SIGNED_INTEGER ||
setting->type == ST_UNSIGNED_INTEGER) {
if (*value == '\0') {
result = ISC_R_FAILURE;
goto cleanup;
}
/* TODO: better type checking. */
numeric_value = atoi(value);
if (setting->type == ST_SIGNED_INTEGER) {
(*(signed *)setting->target) = (signed)numeric_value;
} else if (numeric_value < 0) {
log_error("argument %s must be an unsigned integer",
setting->name);
result = ISC_R_FAILURE;
goto cleanup;
} else {
(*(unsigned *)setting->target) = (unsigned)numeric_value;
}
} else {
fatal_error("unknown type in function set_value()");
result = ISC_R_FAILURE;
goto cleanup;
}
setting->set = 1;
return ISC_R_SUCCESS;
cleanup:
return result;
}
static isc_result_t
set_default_value(setting_t *setting)
{
switch (setting->type) {
case ST_LD_STRING:
return set_value(setting, setting->default_value.value_char);
break;
case ST_SIGNED_INTEGER:
*(signed *)setting->target = setting->default_value.value_sint;
break;
case ST_UNSIGNED_INTEGER:
*(unsigned *)setting->target = setting->default_value.value_uint;
break;
default:
fatal_error("unknown type in function set_default_value()");
return ISC_R_FAILURE;
}
return ISC_R_SUCCESS;
}
static const char *
get_value_str(const char *arg)
{
while (*arg != '\0' && !isspace(*arg))
arg++;
while (*arg != '\0' && isspace(*arg))
arg++;
return arg;
}
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