/* For terms of usage/redistribution/modification see the LICENSE file */
/* For authors and contributors see the AUTHORS file */

#include "iptraf-ng-compat.h"

static void vreportf(const char *prefix, const char *err, va_list params)
{
	char msg[4096];

	vsnprintf(msg, sizeof(msg), err, params);
	fprintf(stderr, "%s%s\n", prefix, msg);
}

static __noreturn void die_builtin(const char *err, va_list params)
{
	vreportf("fatal: ", err, params);
	exit(129);
}

static void error_builtin(const char *err, va_list params)
{
	vreportf("error: ", err, params);
}

void die(const char *err, ...)
{
	va_list params;

	va_start(params, err);
	die_builtin(err, params);
	va_end(params);
}

void error(const char *err, ...)
{
	va_list params;

	va_start(params, err);
	error_builtin(err, params);
	va_end(params);
}

void die_errno(const char *fmt, ...)
{
	va_list params;
	char fmt_with_err[1024];
	char str_error[256], *err;
	size_t i, j;

	err = strerror(errno);
	for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) {
		if ((str_error[j++] = err[i++]) != '%')
			continue;
		if (j < sizeof(str_error) - 1) {
			str_error[j++] = '%';
		} else {
			/* No room to double the '%', so we overwrite it with
			 * '\0' below */
			j--;
			break;
		}
	}
	str_error[j] = 0;
	snprintf(fmt_with_err, sizeof(fmt_with_err), "%s: %s", fmt, str_error);

	va_start(params, fmt);
	die_builtin(fmt_with_err, params);
	va_end(params);
}