/*
Copyright (C) 2003-2004 Douglas Thain and the University of Wisconsin
Copyright (C) 2005- The University of Notre Dame
This software is distributed under the GNU General Public License.
See the file COPYING for details.
*/

#include "username.h"

#include <pwd.h>
#include <unistd.h>
#include <sys/types.h>
#include <string.h>

int username_is_super()
{
	return !getuid();
}

int username_get(char *name)
{
	struct passwd *p;

	p = getpwuid(getuid());
	if(p) {
		strcpy(name, p->pw_name);
		return 1;
	} else {
		return 0;
	}
}

int username_home(char *dir)
{
	struct passwd *p;

	p = getpwuid(getuid());
	if(p) {
		strcpy(dir, p->pw_dir);
		return 1;
	} else {
		return 0;
	}
}

int username_set(const char *name)
{
	struct passwd *p;
	int result;
	uid_t uid;
	gid_t gid;

	p = getpwnam(name);
	if(!p) {
		return 0;
	}

	uid = p->pw_uid;
	gid = p->pw_gid;

	if(geteuid() == uid)
		return 1;

	result = seteuid(0);
	if(result < 0)
		return 0;

	setuid(uid);
	setgid(gid);

	return 1;
}
