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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
     23 /*	  All Rights Reserved  	*/
     24 
     25 
     26 #ident	"%Z%%M%	%I%	%E% SMI"	/* from SVR4 bnu:strsave.c 1.5 */
     27 
     28 #include "uucp.h"
     29 
     30 /* #include <errno.h> */
     31 /* #include <malloc.h> */
     32 /* #include <string.h> */
     33 /* #include <sys/types.h> */
     34 /* #include <sys/stat.h> */
     35 
     36 /* copy str into data space -- caller should report errors. */
     37 
     38 GLOBAL char *
     39 strsave(str)
     40 register char *str;
     41 {
     42 	register char *rval;
     43 
     44 	rval = (char *)malloc(strlen(str) + 1);
     45 	if (rval != 0)
     46 		strcpy(rval, str);
     47 	return(rval);
     48 }
     49 
     50 /*	Determine if the effective user id has the appropriate permission
     51 	on a file.  Modeled after access(2).
     52 	amode:
     53 		00	just checks for file existence.
     54 		04	checks read permission.
     55 		02	checks write permission.
     56 		01	checks execute/search permission.
     57 		other bits are ignored quietly.
     58 */
     59 
     60 GLOBAL int
     61 eaccess( path, amode )
     62 char		*path;
     63 register mode_t	amode;
     64 {
     65 	struct stat	s;
     66 	uid_t euid;
     67 
     68 	if( stat( path, &s ) == -1 )
     69 		return(-1);		/* can't stat file */
     70 	amode &= 07;
     71 
     72 	if( (euid = geteuid()) == 0 )
     73 	    return(0);			/* root can do all */
     74 	if( euid == s.st_uid )
     75 	    s.st_mode >>= 6;		/* use owner bits */
     76 	else if( getegid() == s.st_gid )
     77 	    s.st_mode >>= 3;		/* use group bits */
     78 
     79 	if( (amode & s.st_mode) == amode )
     80 		return(0);		/* access permitted */
     81 	errno = EACCES;
     82 	return(-1);
     83 }
     84