OpenSolaris_b135/cmd/bnu/strsave.c

/*
 * 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 (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/


#ident	"%Z%%M%	%I%	%E% SMI"	/* from SVR4 bnu:strsave.c 1.5 */

#include "uucp.h"

/* #include <errno.h> */
/* #include <malloc.h> */
/* #include <string.h> */
/* #include <sys/types.h> */
/* #include <sys/stat.h> */

/* copy str into data space -- caller should report errors. */

GLOBAL char *
strsave(str)
register char *str;
{
	register char *rval;

	rval = (char *)malloc(strlen(str) + 1);
	if (rval != 0)
		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.
*/

GLOBAL int
eaccess( path, amode )
char		*path;
register 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 )
	    return(0);			/* root can do all */
	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);
}