1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2001-2002 Chris D. Faulhaber 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/types.h> 30 #include <sys/acl.h> 31 #include <sys/stat.h> 32 33 #include <err.h> 34 35 #include "setfacl.h" 36 37 /* set the appropriate mask the given ACL's */ 38 int 39 set_acl_mask(acl_t *prev_acl, const char *filename) 40 { 41 acl_entry_t entry; 42 acl_t acl; 43 acl_tag_t tag; 44 int entry_id; 45 46 entry = NULL; 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 == NULL) 58 err(1, "%s: acl_dup() failed", filename); 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("%s: acl_calc_mask() failed", filename); 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 80 entry_id = ACL_FIRST_ENTRY; 81 82 while (acl_get_entry(acl, entry_id, &entry) == 1) { 83 entry_id = ACL_NEXT_ENTRY; 84 if (acl_get_tag_type(entry, &tag) == -1) 85 err(1, "%s: acl_get_tag_type() failed", 86 filename); 87 88 if (tag == ACL_MASK) { 89 acl_free(acl); 90 return (0); 91 } 92 } 93 94 /* 95 * If no mask entry is specified, the -n option is specified, 96 * and no ACL mask entry exists in the ACL associated with the 97 * file, then write an error message to standard error and 98 * continue with the next file. 99 */ 100 warnx("%s: warning: no mask entry", filename); 101 acl_free(acl); 102 return (0); 103 } 104 105 acl_free(*prev_acl); 106 *prev_acl = acl_dup(acl); 107 acl_free(acl); 108 109 return (0); 110 } 111