getpw.c

来自「手机嵌入式Linux下可用的busybox源码」· C语言 代码 · 共 46 行

/*
 * getpw.c - This file is part of the libc-8086/pwd package for ELKS,
 * Copyright (C) 1995, 1996 Nat Friedman <[e-mail]>.
 * 
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the Free
 *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include "pwd.h"

int getpw(uid_t uid, char *buf)
{
	struct passwd *passwd;

	if (buf == NULL) {
		errno = EINVAL;
		return -1;
	}
	if ((passwd = getpwuid(uid)) == NULL)
		return -1;

	if (sprintf (buf, "%s:%s:%u:%u:%s:%s:%s", passwd->pw_name, passwd->pw_passwd,
		 passwd->pw_gid, passwd->pw_uid, passwd->pw_gecos, passwd->pw_dir,
		 passwd->pw_shell) < 0) {
		errno = ENOBUFS;
		return -1;
	}

	return 0;
}