1 /*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. 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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)stat_flags.c 8.1 (Berkeley) 5/31/93 34 * $FreeBSD: src/lib/libc/gen/strtofflags.c,v 1.18.2.1 2000/06/28 01:52:24 joe Exp $ 35 * $DragonFly: src/lib/libc/gen/strtofflags.c,v 1.5 2008/06/02 20:17:07 dillon Exp $ 36 */ 37 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 41 #include <stddef.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 static struct { 47 const char *name; 48 u_long flag; 49 int invert; 50 } mapping[] = { 51 /* shorter names per flag first, all prefixed by "no" */ 52 { "nosappnd", SF_APPEND, 0 }, 53 { "nosappend", SF_APPEND, 0 }, 54 { "noarch", SF_ARCHIVED, 0 }, 55 { "noarchived", SF_ARCHIVED, 0 }, 56 { "noschg", SF_IMMUTABLE, 0 }, 57 { "noschange", SF_IMMUTABLE, 0 }, 58 #ifdef SF_NOHISTORY 59 { "noshistory", SF_NOHISTORY, 1 }, 60 #endif 61 { "nosimmutable", SF_IMMUTABLE, 0 }, 62 { "nosunlnk", SF_NOUNLINK, 1 }, 63 { "nosunlink", SF_NOUNLINK, 1 }, 64 { "nouappnd", UF_APPEND, 0 }, 65 { "nouappend", UF_APPEND, 0 }, 66 { "nouchg", UF_IMMUTABLE, 0 }, 67 { "nouchange", UF_IMMUTABLE, 0 }, 68 { "nouimmutable", UF_IMMUTABLE, 0 }, 69 { "nodump", UF_NODUMP, 1 }, 70 { "noopaque", UF_OPAQUE, 0 }, 71 #ifdef UF_NOHISTORY 72 { "nouhistory", UF_NOHISTORY, 1 }, 73 { "nohistory", UF_NOHISTORY, 1 }, 74 #endif 75 { "nouunlnk", UF_NOUNLINK, 1 }, 76 { "nouunlink", UF_NOUNLINK, 1 } 77 }; 78 #define longestflaglen 12 79 #define nmappings (sizeof(mapping) / sizeof(mapping[0])) 80 81 /* 82 * fflagstostr -- 83 * Convert file flags to a comma-separated string. If no flags 84 * are set, return the empty string. 85 */ 86 char * 87 fflagstostr(u_long flags) 88 { 89 char *string; 90 const char *sp; 91 char *dp; 92 u_long setflags; 93 u_int i; 94 95 if ((string = (char *)malloc(nmappings * (longestflaglen + 1))) == NULL) 96 return (NULL); 97 98 setflags = flags; 99 dp = string; 100 for (i = 0; i < nmappings; i++) { 101 if (setflags & mapping[i].flag) { 102 if (dp > string) 103 *dp++ = ','; 104 for (sp = mapping[i].invert ? mapping[i].name : 105 mapping[i].name + 2; *sp; *dp++ = *sp++) ; 106 setflags &= ~mapping[i].flag; 107 } 108 } 109 *dp = '\0'; 110 return (string); 111 } 112 113 /* 114 * strtofflags -- 115 * Take string of arguments and return file flags. Return 0 on 116 * success, 1 on failure. On failure, stringp is set to point 117 * to the offending token. 118 */ 119 int 120 strtofflags(char **stringp, u_long *setp, u_long *clrp) 121 { 122 char *string, *p; 123 u_int i; 124 125 if (setp) 126 *setp = 0; 127 if (clrp) 128 *clrp = 0; 129 string = *stringp; 130 while ((p = strsep(&string, "\t ,")) != NULL) { 131 *stringp = p; 132 if (*p == '\0') 133 continue; 134 for (i = 0; i < nmappings; i++) { 135 if (strcmp(p, mapping[i].name + 2) == 0) { 136 if (mapping[i].invert) { 137 if (clrp) 138 *clrp |= mapping[i].flag; 139 } else { 140 if (setp) 141 *setp |= mapping[i].flag; 142 } 143 break; 144 } else if (strcmp(p, mapping[i].name) == 0) { 145 if (mapping[i].invert) { 146 if (setp) 147 *setp |= mapping[i].flag; 148 } else { 149 if (clrp) 150 *clrp |= mapping[i].flag; 151 } 152 break; 153 } 154 } 155 if (i == nmappings) 156 return 1; 157 } 158 return 0; 159 } 160