#include <sys/types.h>

#include <string.h>

#include <stdbool.h>

#include <stdio.h>

#include <unistd.h>

#include <errno.h>

#include <assert.h>

#include <fcntl.h>

#include "syslog.h"

/* Prototypes */

static int init_handle(const char * restrict name);

/* Local globals */

static int out_file;

static bool file_enabled = false;

/* Returns -2 when the file wasn't initialized by config, 0 when all was ok,

 * -1 on more important error */

int init_out_file()

{

	char name[MAX_STRING];

	assert (get_config(LOG_FILE, name, MAX_STRING) > 0);

	if (strncmp(name, "disabled", MAX_STRING) == 0)

		return -2;

	return init_handle(name);

}

/* Returns 0 when all was ok, -1 on error */

static int init_handle(const char * restrict name)

{

	/* We must specify the mode, because we add O_CREAD */

	out_file = open(name, O_WRONLY | O_APPEND | O_CREAT, 0600);

	if (out_file == -1)

	{

		fprintf(stderr, "Error opening the log file: %s\n",

				strerror(errno));

		return -1;

	}

	file_enabled = true;

	return 0;

}

/* Return -2 when the file is not enabled. Otherwise, the output of send().*/

int write_out_file(const char * restrict buf, const int len)

{

	int res, res2;

	if (!file_enabled)

		return -2;

	res = write(out_file, buf, len);

	res2 = write(out_file, "\n", 1);

	if (res == -1 || res2 == -1)

	{

		fprintf(stderr, "Error writing to the log file: %s\n", 

			strerror(errno));

	} 

	return res;

}

/* Return -2 when the file is not enabled. Otherwise, the output of close().*/

int close_out_file()

{

	int res;

	if (!file_enabled)

		return -2;

	res = close(out_file);

	if (res == -1)

	{

		fprintf(stderr, "Error closing the log file: %s\n", 

			strerror(errno));

	}

	file_enabled = false;

	return res;

}