/*
 * Copyright © 2015 Aleksey Cheusov <vle@gmx.net>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 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
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "mkc_pwdgrp.h"

#include <stdlib.h>
#include <stdio.h>

#ifndef HAVE_FUNC2_USER_FROM_UID_PWD_H
const char *user_from_uid(uid_t uid, int nouser)
{
	struct passwd *p = getpwuid(uid);
	if (p)
		return p->pw_name;

	if (nouser)
		return NULL;

	static char num [128];
	snprintf(num, sizeof (num), "%d", (int)uid);
	return num;
}
#endif

#ifndef HAVE_FUNC2_GROUP_FROM_GID_GRP_H
const char *group_from_gid(gid_t gid, int nogroup)
{
	struct group *g = getgrgid(gid);
	if (g)
		return g->gr_name;

	if (nogroup)
		return NULL;

	static char num [128];
	snprintf(num, sizeof (num), "%d", (int)gid);
	return num;
}
#endif

#ifndef HAVE_FUNC2_UID_FROM_USER_PWD_H
int uid_from_user(const char *name, uid_t *uid)
{
	struct passwd *p = getpwnam(name);
	if (!p)
		return -1;

	*uid = p->pw_uid;
	return 0;
}
#endif

#ifndef HAVE_FUNC2_GID_FROM_GROUP_GRP_H
int gid_from_group(const char *name, gid_t *gid)
{
	struct group *g = getgrnam(name);
	if (!g)
		return -1;

	*gid = g->gr_gid;

	return 0;
}
#endif