fsaccess.c revision 234010
1/* 2 * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 2000, 2001 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* $Id: fsaccess.c,v 1.13 2007/06/19 23:47:18 tbox Exp $ */ 19 20#include <config.h> 21 22#include <sys/types.h> 23#include <sys/stat.h> 24 25#include <errno.h> 26 27#include "errno2result.h" 28 29/*! \file 30 * \brief 31 * The OS-independent part of the API is in lib/isc. 32 */ 33#include "../fsaccess.c" 34 35isc_result_t 36isc_fsaccess_set(const char *path, isc_fsaccess_t access) { 37 struct stat statb; 38 mode_t mode; 39 isc_boolean_t is_dir = ISC_FALSE; 40 isc_fsaccess_t bits; 41 isc_result_t result; 42 43 if (stat(path, &statb) != 0) 44 return (isc__errno2result(errno)); 45 46 if ((statb.st_mode & S_IFDIR) != 0) 47 is_dir = ISC_TRUE; 48 else if ((statb.st_mode & S_IFREG) == 0) 49 return (ISC_R_INVALIDFILE); 50 51 result = check_bad_bits(access, is_dir); 52 if (result != ISC_R_SUCCESS) 53 return (result); 54 55 /* 56 * Done with checking bad bits. Set mode_t. 57 */ 58 mode = 0; 59 60#define SET_AND_CLEAR1(modebit) \ 61 if ((access & bits) != 0) { \ 62 mode |= modebit; \ 63 access &= ~bits; \ 64 } 65#define SET_AND_CLEAR(user, group, other) \ 66 SET_AND_CLEAR1(user); \ 67 bits <<= STEP; \ 68 SET_AND_CLEAR1(group); \ 69 bits <<= STEP; \ 70 SET_AND_CLEAR1(other); 71 72 bits = ISC_FSACCESS_READ | ISC_FSACCESS_LISTDIRECTORY; 73 74 SET_AND_CLEAR(S_IRUSR, S_IRGRP, S_IROTH); 75 76 bits = ISC_FSACCESS_WRITE | 77 ISC_FSACCESS_CREATECHILD | 78 ISC_FSACCESS_DELETECHILD; 79 80 SET_AND_CLEAR(S_IWUSR, S_IWGRP, S_IWOTH); 81 82 bits = ISC_FSACCESS_EXECUTE | 83 ISC_FSACCESS_ACCESSCHILD; 84 85 SET_AND_CLEAR(S_IXUSR, S_IXGRP, S_IXOTH); 86 87 INSIST(access == 0); 88 89 if (chmod(path, mode) < 0) 90 return (isc__errno2result(errno)); 91 92 return (ISC_R_SUCCESS); 93} 94