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/*
 * Copyright (c) 2001-2002 Packet Design, LLC.
 * All rights reserved.
 * 
 * Subject to the following obligations and disclaimer of warranty,
 * use and redistribution of this software, in source or object code
 * forms, with or without modifications are expressly permitted by
 * Packet Design; provided, however, that:
 * 
 *    (i)  Any and all reproductions of the source or object code
 *         must include the copyright notice above and the following
 *         disclaimer of warranties; and
 *    (ii) No rights are granted, in any manner or form, to use
 *         Packet Design trademarks, including the mark "PACKET DESIGN"
 *         on advertising, endorsements, or otherwise except as such
 *         appears in the above copyright notice or in the software.
 * 
 * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
 * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
 * OR NON-INFRINGEMENT.  PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
 * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
 * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
 * RELIABILITY OR OTHERWISE.  IN NO EVENT SHALL PACKET DESIGN BE
 * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
 * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
 * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
 * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Author: Archie Cobbs <archie@freebsd.org>
 */

#include <sys/types.h>

#include <netinet/in.h>

#include <stdio.h>
#include <assert.h>
#include <syslog.h>
#include <unistd.h>
#include <stdarg.h>

#include "structs/structs.h"
#include "structs/type/array.h"
#include "util/typed_mem.h"
#include "config/app_config.h"
#include "sys/alog.h"

/************************************************************************
			DIRECTORY SUBSYSTEM
************************************************************************/

static app_ss_startup_t		app_directory_start;
static app_ss_willrun_t		app_directory_willrun;
static app_ss_changed_t		app_directory_changed;

const struct app_subsystem	app_config_directory_subsystem = {
	"directory",
	NULL,
	app_directory_start,
	NULL,
	app_directory_willrun,
	app_directory_changed,
	NULL
};

/*
 * Directory startup
 */
static int
app_directory_start(struct app_config_ctx *ctx,
	const struct app_subsystem *ss, const void *config)
{
	const char *const name = ss->arg;
	char *dir;
	int r;

	/* Get directory */
	if ((dir = structs_get_string(app_config_get_type(ctx),
	    name, config, TYPED_MEM_TEMP)) == NULL) {
		alogf(LOG_ERR, "%s: %m", "structs_get_string");
		return (-1);
	}

	/* Change into it */
	if ((r = chdir(dir)) == -1)
		alog(LOG_ERR, "can't change to directory \"%s\": %m", dir);
	FREE(TYPED_MEM_TEMP, dir);
	return (r);
}

/*
 * Directory necessity check
 */
static int
app_directory_willrun(struct app_config_ctx *ctx,
	const struct app_subsystem *ss, const void *config)
{
	const char *const name = ss->arg;
	char *dir;
	int r;

	/* Get directory */
	assert(name != NULL);
	if ((dir = structs_get_string(app_config_get_type(ctx),
	    name, config, TYPED_MEM_TEMP)) == NULL) {
		alogf(LOG_ERR, "%s: %m", "structs_get_string");
		return (-1);
	}

	/* Check if not NULL */
	r = (*dir != '\0');
	FREE(TYPED_MEM_TEMP, dir);
	return (r);
}

/*
 * Directory configuration changed check
 */
static int
app_directory_changed(struct app_config_ctx *ctx,
	const struct app_subsystem *ss, const void *config1,
	const void *config2)
{
	const char *const name = ss->arg;
	int ret;

	/* Compare directory names */
	if ((ret = structs_equal(app_config_get_type(ctx),
	    name, config1, config2)) == -1) {
		alogf(LOG_ERR, "%s: %m", "structs_equal");
		return (-1);
	}
	return (!ret);
}