/*
 * Live variable collector
 * Copyright (C) 2024-2025  Nguyễn Gia Phong
 *
 * This file is part of taosc.
 *
 * Taosc is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Taosc 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with taosc.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "stdlib.c"

static int output_file = -1;

void init(int argc, const char *const *argv, char **envp)
{
	environ = envp;
	const char *const path = getenv("TAOSC_OUTPUT");
	if (path != NULL)
		output_file = open(path, O_WRONLY | O_CREAT | O_EXCL, 0644);
	if (output_file == -1) {
		const char *msg = "cannot open $TAOSC_OUTPUT for writing\n";
		write(2, msg, strlen(msg));
		fsync(2);
		exit(128);
	}
	write(output_file, "\n", 1);
	fsync(output_file);
}

void report(void)
{
	ftruncate(output_file, 0);
}