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 23 /* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 #include "uucp.h" 34 35 #if defined(sparc) 36 #define _STAT _stat 37 #else /* !sparc */ 38 #define _STAT stat 39 #endif /* sparc */ 40 41 extern int _stat(const char *, struct stat *); 42 43 /* copy str into data space -- caller should report errors. */ 44 45 static char * 46 strsave(const char *str) 47 { 48 char *rval; 49 50 rval = malloc(strlen(str) + 1); 51 if (rval != 0) 52 (void) strcpy(rval, str); 53 return (rval); 54 } 55 56 /* 57 * Determine if the effective user id has the appropriate permission 58 * on a file. Modeled after access(2). 59 * amode: 60 * 00 just checks for file existence. 61 * 04 checks read permission. 62 * 02 checks write permission. 63 * 01 checks execute/search permission. 64 * other bits are ignored quietly. 65 */ 66 67 static int 68 eaccess(char *path, mode_t amode) 69 { 70 struct stat s; 71 uid_t euid; 72 73 if (_STAT(path, &s) == -1) 74 return (-1); /* can't stat file */ 75 amode &= 07; 76 77 if ((euid = geteuid()) == 0) /* root can do all */ 78 return (0); 79 if (euid == s.st_uid) 80 s.st_mode >>= 6; /* use owner bits */ 81 else if (getegid() == s.st_gid) 82 s.st_mode >>= 3; /* use group bits */ 83 84 if ((amode & s.st_mode) == amode) 85 return (0); /* access permitted */ 86 errno = EACCES; 87 return (-1); 88 } 89