mask.c revision 74465
1/* 2 * Copyright (c) 2001 Chris D. Faulhaber 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE VOICES IN HIS HEAD BE 18 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 * POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD: head/bin/setfacl/mask.c 74465 2001-03-19 18:09:25Z rwatson $ 27 */ 28 29#include <sys/types.h> 30#include <sys/acl.h> 31#include <sys/stat.h> 32 33#include <err.h> 34#include <errno.h> 35#include <stdio.h> 36#include <stdlib.h> 37#include <sysexits.h> 38 39#include "setfacl.h" 40 41/* set the appropriate mask the given ACL's */ 42int 43set_acl_mask(acl_t prev_acl) 44{ 45 acl_t acl; 46 int i; 47 48 /* 49 * ... if a mask entry is specified, then the permissions of the mask 50 * entry in the resulting ACL shall be set to the permissions in the 51 * specified ACL mask entry. 52 */ 53 if (have_mask) 54 return 0; 55 56 acl = acl_dup(prev_acl); 57 if (!acl) 58 err(EX_OSERR, "acl_dup() failed"); 59 60 if (!n_flag) { 61 /* 62 * If no mask entry is specified and the -n option is not 63 * specified, then the permissions of the resulting ACL mask 64 * entry shall be set to the union of the permissions 65 * associated with all entries which belong to the file group 66 * class in the resulting ACL 67 */ 68 if (acl_calc_mask(&acl)) { 69 warn("acl_calc_mask() failed"); 70 acl_free(acl); 71 return -1; 72 } 73 } else { 74 /* 75 * If no mask entry is specified and the -n option is 76 * specified, then the permissions of the resulting ACL 77 * mask entry shall remain unchanged ... 78 */ 79 for (i = 0; i < acl->acl_cnt; i++) 80 if (acl->acl_entry[i].ae_tag == ACL_MASK) { 81 acl_free(acl); 82 return 0; 83 } 84 85 /* 86 * If no mask entry is specified, the -n option is specified, 87 * and no ACL mask entry exists in the ACL associated with the 88 * file, then write an error message to standard error and 89 * continue with the next file. 90 */ 91 warnx("warning: no mask entry"); 92 acl_free(acl); 93 return 0; 94 } 95 96 *prev_acl = *acl; 97 acl_free(acl); 98 99 return 0; 100} 101