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 CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * 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, const char *filename) 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, "%s: acl_dup() failed", filename); 63 64 if (!n_flag) { 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("%s: acl_calc_mask() failed", filename); 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, "%s: acl_get_tag_type() failed", 90 filename); 91 92 if (tag == ACL_MASK) { 93 acl_free(acl); 94 return (0); 95 } 96 } 97 98 /* 99 * If no mask entry is specified, the -n option is specified, 100 * and no ACL mask entry exists in the ACL associated with the 101 * file, then write an error message to standard error and 102 * continue with the next file. 103 */ 104 warnx("%s: warning: no mask entry", filename); 105 acl_free(acl); 106 return (0); 107 } 108 109 acl_free(*prev_acl); 110 *prev_acl = acl_dup(acl); 111 acl_free(acl); 112 113 return (0); 114 } 115