1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1993 5 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/stat.h> 34 35 #include <stddef.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 #define longestflaglen 12 41 static struct { 42 char name[longestflaglen + 1]; 43 char invert; 44 u_long flag; 45 } const mapping[] = { 46 /* shorter names per flag first, all prefixed by "no" */ 47 { "nosappnd", 0, SF_APPEND }, 48 { "nosappend", 0, SF_APPEND }, 49 { "noarch", 0, SF_ARCHIVED }, 50 { "noarchived", 0, SF_ARCHIVED }, 51 { "noschg", 0, SF_IMMUTABLE }, 52 { "noschange", 0, SF_IMMUTABLE }, 53 { "nosimmutable", 0, SF_IMMUTABLE }, 54 { "nosunlnk", 0, SF_NOUNLINK }, 55 { "nosunlink", 0, SF_NOUNLINK }, 56 #ifdef SF_SNAPSHOT 57 { "nosnapshot", 0, SF_SNAPSHOT }, 58 #endif 59 { "nouappnd", 0, UF_APPEND }, 60 { "nouappend", 0, UF_APPEND }, 61 { "nouarch", 0, UF_ARCHIVE }, 62 { "nouarchive", 0, UF_ARCHIVE }, 63 { "nohidden", 0, UF_HIDDEN }, 64 { "nouhidden", 0, UF_HIDDEN }, 65 { "nouchg", 0, UF_IMMUTABLE }, 66 { "nouchange", 0, UF_IMMUTABLE }, 67 { "nouimmutable", 0, UF_IMMUTABLE }, 68 { "nodump", 1, UF_NODUMP }, 69 { "nouunlnk", 0, UF_NOUNLINK }, 70 { "nouunlink", 0, UF_NOUNLINK }, 71 { "nooffline", 0, UF_OFFLINE }, 72 { "nouoffline", 0, UF_OFFLINE }, 73 { "noopaque", 0, UF_OPAQUE }, 74 { "nordonly", 0, UF_READONLY }, 75 { "nourdonly", 0, UF_READONLY }, 76 { "noreadonly", 0, UF_READONLY }, 77 { "noureadonly", 0, UF_READONLY }, 78 { "noreparse", 0, UF_REPARSE }, 79 { "noureparse", 0, UF_REPARSE }, 80 { "nosparse", 0, UF_SPARSE }, 81 { "nousparse", 0, UF_SPARSE }, 82 { "nosystem", 0, UF_SYSTEM }, 83 /* Needed for some Linux cross-build that uses a stale stat.h. */ 84 { "nousystem", 0, UF_SYSTEM }, 85 #ifdef UF_NOCACHE 86 { "nocache", 1, UF_NOCACHE }, 87 { "noucache", 1, UF_NOCACHE } 88 #endif 89 }; 90 #define nmappings (sizeof(mapping) / sizeof(mapping[0])) 91 92 /* 93 * fflagstostr -- 94 * Convert file flags to a comma-separated string. If no flags 95 * are set, return the empty string. 96 */ 97 char * 98 fflagstostr(u_long flags) 99 { 100 char *string; 101 const char *sp; 102 char *dp; 103 u_long setflags; 104 u_int i; 105 106 if ((string = (char *)malloc(nmappings * (longestflaglen + 1))) == NULL) 107 return (NULL); 108 109 setflags = flags; 110 dp = string; 111 for (i = 0; i < nmappings; i++) { 112 if (setflags & mapping[i].flag) { 113 if (dp > string) 114 *dp++ = ','; 115 for (sp = mapping[i].invert ? mapping[i].name : 116 mapping[i].name + 2; *sp; *dp++ = *sp++) ; 117 setflags &= ~mapping[i].flag; 118 } 119 } 120 *dp = '\0'; 121 return (string); 122 } 123 124 /* 125 * strtofflags -- 126 * Take string of arguments and return file flags. Return 0 on 127 * success, 1 on failure. On failure, stringp is set to point 128 * to the offending token. 129 */ 130 int 131 strtofflags(char **stringp, u_long *setp, u_long *clrp) 132 { 133 char *string, *p; 134 int i; 135 136 if (setp) 137 *setp = 0; 138 if (clrp) 139 *clrp = 0; 140 string = *stringp; 141 while ((p = strsep(&string, "\t ,")) != NULL) { 142 *stringp = p; 143 if (*p == '\0') 144 continue; 145 for (i = 0; i < nmappings; i++) { 146 if (strcmp(p, mapping[i].name + 2) == 0) { 147 if (mapping[i].invert) { 148 if (clrp) 149 *clrp |= mapping[i].flag; 150 } else { 151 if (setp) 152 *setp |= mapping[i].flag; 153 } 154 break; 155 } else if (strcmp(p, mapping[i].name) == 0) { 156 if (mapping[i].invert) { 157 if (setp) 158 *setp |= mapping[i].flag; 159 } else { 160 if (clrp) 161 *clrp |= mapping[i].flag; 162 } 163 break; 164 } 165 } 166 if (i == nmappings) 167 return 1; 168 } 169 return 0; 170 } 171