17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 22*61961e0fSrobinson 23*61961e0fSrobinson /* 24*61961e0fSrobinson * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25*61961e0fSrobinson * Use is subject to license terms. 26*61961e0fSrobinson */ 27*61961e0fSrobinson 287c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 297c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 307c478bd9Sstevel@tonic-gate 31*61961e0fSrobinson #pragma ident "%Z%%M% %I% %E% SMI" 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate #include "uucp.h" 347c478bd9Sstevel@tonic-gate 357c478bd9Sstevel@tonic-gate #if defined(sparc) 367c478bd9Sstevel@tonic-gate #define _STAT _stat 377c478bd9Sstevel@tonic-gate #else /* !sparc */ 387c478bd9Sstevel@tonic-gate #define _STAT stat 397c478bd9Sstevel@tonic-gate #endif /* sparc */ 407c478bd9Sstevel@tonic-gate 417c478bd9Sstevel@tonic-gate extern int _stat(const char *, struct stat *); 427c478bd9Sstevel@tonic-gate 437c478bd9Sstevel@tonic-gate /* copy str into data space -- caller should report errors. */ 447c478bd9Sstevel@tonic-gate 45*61961e0fSrobinson static char * 46*61961e0fSrobinson strsave(const char *str) 477c478bd9Sstevel@tonic-gate { 48*61961e0fSrobinson char *rval; 497c478bd9Sstevel@tonic-gate 507c478bd9Sstevel@tonic-gate rval = malloc(strlen(str) + 1); 517c478bd9Sstevel@tonic-gate if (rval != 0) 52*61961e0fSrobinson (void) strcpy(rval, str); 537c478bd9Sstevel@tonic-gate return (rval); 547c478bd9Sstevel@tonic-gate } 557c478bd9Sstevel@tonic-gate 56*61961e0fSrobinson /* 57*61961e0fSrobinson * Determine if the effective user id has the appropriate permission 58*61961e0fSrobinson * on a file. Modeled after access(2). 59*61961e0fSrobinson * amode: 60*61961e0fSrobinson * 00 just checks for file existence. 61*61961e0fSrobinson * 04 checks read permission. 62*61961e0fSrobinson * 02 checks write permission. 63*61961e0fSrobinson * 01 checks execute/search permission. 64*61961e0fSrobinson * other bits are ignored quietly. 657c478bd9Sstevel@tonic-gate */ 667c478bd9Sstevel@tonic-gate 67*61961e0fSrobinson static int 68*61961e0fSrobinson eaccess(char *path, mode_t amode) 697c478bd9Sstevel@tonic-gate { 707c478bd9Sstevel@tonic-gate struct stat s; 717c478bd9Sstevel@tonic-gate uid_t euid; 727c478bd9Sstevel@tonic-gate 73*61961e0fSrobinson if (_STAT(path, &s) == -1) 747c478bd9Sstevel@tonic-gate return (-1); /* can't stat file */ 757c478bd9Sstevel@tonic-gate amode &= 07; 767c478bd9Sstevel@tonic-gate 77*61961e0fSrobinson if ((euid = geteuid()) == 0) /* root can do all */ 787c478bd9Sstevel@tonic-gate return (0); 797c478bd9Sstevel@tonic-gate if (euid == s.st_uid) 807c478bd9Sstevel@tonic-gate s.st_mode >>= 6; /* use owner bits */ 817c478bd9Sstevel@tonic-gate else if (getegid() == s.st_gid) 827c478bd9Sstevel@tonic-gate s.st_mode >>= 3; /* use group bits */ 837c478bd9Sstevel@tonic-gate 84*61961e0fSrobinson if ((amode & s.st_mode) == amode) 857c478bd9Sstevel@tonic-gate return (0); /* access permitted */ 867c478bd9Sstevel@tonic-gate errno = EACCES; 877c478bd9Sstevel@tonic-gate return (-1); 887c478bd9Sstevel@tonic-gate } 89