/*
 * Copyright (C) 2011 Marcin Kościelnicki <koriakin@0x04.net>
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "util.h"
#include <string.h>

FILE *find_in_path(const char *name, const char *path, char **pfullname) {
	if (!path)
		return 0;
	while (path) {
		const char *npath = strchr(path, ':');
		size_t plen;
		if (npath) {
			plen = npath - path;
			npath++;
		} else {
			plen = strlen(path);
		}
		if (plen) {
			char *fullname = malloc(strlen(name) + plen + 2);
			strncpy(fullname, path, plen);
			fullname[plen] = '/';
			fullname[plen+1] = 0;
			strcat(fullname, name);
			FILE *file = fopen(fullname, "r");
			if (file) {
				if (pfullname)
					*pfullname = fullname;
				else
					free(fullname);
				return file;
			}
			free(fullname);
		}
		path = npath;
	}
	return 0;
}