strsave.c revision 61961e0f20c7637a3846bb39786bb9dffa91dfb9
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include "uucp.h"
#if defined(sparc)
#define _STAT _stat
#else /* !sparc */
#define _STAT stat
#endif /* sparc */
extern int _stat(const char *, struct stat *);
/* copy str into data space -- caller should report errors. */
static char *
strsave(const char *str)
{
char *rval;
rval = malloc(strlen(str) + 1);
if (rval != 0)
(void) strcpy(rval, str);
return (rval);
}
/*
* Determine if the effective user id has the appropriate permission
* on a file. Modeled after access(2).
* amode:
* 00 just checks for file existence.
* 04 checks read permission.
* 02 checks write permission.
* 01 checks execute/search permission.
* other bits are ignored quietly.
*/
static int
eaccess(char *path, mode_t amode)
{
struct stat s;
uid_t euid;
if (_STAT(path, &s) == -1)
return (-1); /* can't stat file */
amode &= 07;
if ((euid = geteuid()) == 0) /* root can do all */
return (0);
if (euid == s.st_uid)
s.st_mode >>= 6; /* use owner bits */
else if (getegid() == s.st_gid)
s.st_mode >>= 3; /* use group bits */
if ((amode & s.st_mode) == amode)
return (0); /* access permitted */
errno = EACCES;
return (-1);
}