1 /*- 2 * Copyright (c) 2001-2002 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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <sys/acl.h> 32 #include <sys/stat.h> 33 34 #include <err.h> 35 #include <errno.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 39 #include "setfacl.h" 40 41 /* set the appropriate mask the given ACL's */ 42 int 43 set_acl_mask(acl_t *prev_acl) 44 { 45 acl_entry_t entry; 46 acl_t acl; 47 acl_tag_t tag; 48 int entry_id; 49 50 entry = NULL; 51 52 /* 53 * ... if a mask entry is specified, then the permissions of the mask 54 * entry in the resulting ACL shall be set to the permissions in the 55 * specified ACL mask entry. 56 */ 57 if (have_mask) 58 return (0); 59 60 acl = acl_dup(*prev_acl); 61 if (acl == NULL) 62 err(1, "acl_dup() failed"); 63 64 if (n_flag == 0) { 65 /* 66 * If no mask entry is specified and the -n option is not 67 * specified, then the permissions of the resulting ACL mask 68 * entry shall be set to the union of the permissions 69 * associated with all entries which belong to the file group 70 * class in the resulting ACL 71 */ 72 if (acl_calc_mask(&acl)) { 73 warn("acl_calc_mask() failed"); 74 acl_free(acl); 75 return (-1); 76 } 77 } else { 78 /* 79 * If no mask entry is specified and the -n option is 80 * specified, then the permissions of the resulting ACL 81 * mask entry shall remain unchanged ... 82 */ 83 84 entry_id = ACL_FIRST_ENTRY; 85 86 while (acl_get_entry(acl, entry_id, &entry) == 1) { 87 entry_id = ACL_NEXT_ENTRY; 88 if (acl_get_tag_type(entry, &tag) == -1) 89 err(1, "acl_get_tag_type() failed"); 90 91 if (tag == ACL_MASK) { 92 acl_free(acl); 93 return (0); 94 } 95 } 96 97 /* 98 * If no mask entry is specified, the -n option is specified, 99 * and no ACL mask entry exists in the ACL associated with the 100 * file, then write an error message to standard error and 101 * continue with the next file. 102 */ 103 warnx("warning: no mask entry"); 104 acl_free(acl); 105 return (0); 106 } 107 108 acl_free(*prev_acl); 109 *prev_acl = acl_dup(acl); 110 acl_free(acl); 111 112 return (0); 113 } 114