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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)stat_flags.c 8.1 (Berkeley) 5/31/93
30 * $FreeBSD: src/lib/libc/gen/strtofflags.c,v 1.18.2.1 2000/06/28 01:52:24 joe Exp $
31 * $DragonFly: src/lib/libc/gen/strtofflags.c,v 1.5 2008/06/02 20:17:07 dillon Exp $
32 */
33
34 #include <sys/types.h>
35 #include <sys/stat.h>
36
37 #include <stddef.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <unistd.h>
41
42 static struct {
43 const char *name;
44 u_long flag;
45 int invert;
46 } mapping[] = {
47 /* shorter names per flag first, all prefixed by "no" */
48 { "nosappnd", SF_APPEND, 0 },
49 { "nosappend", SF_APPEND, 0 },
50 { "noarch", SF_ARCHIVED, 0 },
51 { "noarchived", SF_ARCHIVED, 0 },
52 { "noschg", SF_IMMUTABLE, 0 },
53 { "noschange", SF_IMMUTABLE, 0 },
54 #ifdef SF_NOHISTORY
55 { "noshistory", SF_NOHISTORY, 1 },
56 #endif
57 { "nosimmutable", SF_IMMUTABLE, 0 },
58 { "nosunlnk", SF_NOUNLINK, 1 },
59 { "nosunlink", SF_NOUNLINK, 1 },
60 { "nouappnd", UF_APPEND, 0 },
61 { "nouappend", UF_APPEND, 0 },
62 { "nouchg", UF_IMMUTABLE, 0 },
63 { "nouchange", UF_IMMUTABLE, 0 },
64 { "nouimmutable", UF_IMMUTABLE, 0 },
65 { "nodump", UF_NODUMP, 1 },
66 { "noopaque", UF_OPAQUE, 0 },
67 #ifdef UF_NOHISTORY
68 { "nouhistory", UF_NOHISTORY, 1 },
69 { "nohistory", UF_NOHISTORY, 1 },
70 #endif
71 { "nouunlnk", UF_NOUNLINK, 1 },
72 { "nouunlink", UF_NOUNLINK, 1 },
73 #ifdef UF_CACHE
74 { "nocache", UF_CACHE, 0 },
75 { "noucache", UF_CACHE, 0 },
76 { "noscache", SF_NOCACHE, 1 },
77 #endif
78 #ifdef UF_XLINK
79 { "noxlink", UF_XLINK, 0 },
80 { "nouxlink", UF_XLINK, 0 },
81 { "nosxlink", SF_XLINK, 0 },
82 #endif
83 };
84 #define longestflaglen 12
85 #define nmappings (sizeof(mapping) / sizeof(mapping[0]))
86
87 /*
88 * fflagstostr --
89 * Convert file flags to a comma-separated string. If no flags
90 * are set, return the empty string.
91 */
92 char *
fflagstostr(u_long flags)93 fflagstostr(u_long flags)
94 {
95 char *string;
96 const char *sp;
97 char *dp;
98 u_long setflags;
99 u_int i;
100
101 if ((string = (char *)malloc(nmappings * (longestflaglen + 1))) == NULL)
102 return (NULL);
103
104 setflags = flags;
105 dp = string;
106 for (i = 0; i < nmappings; i++) {
107 if (setflags & mapping[i].flag) {
108 if (dp > string)
109 *dp++ = ',';
110 for (sp = mapping[i].invert ? mapping[i].name :
111 mapping[i].name + 2; *sp; *dp++ = *sp++) ;
112 setflags &= ~mapping[i].flag;
113 }
114 }
115 *dp = '\0';
116 return (string);
117 }
118
119 /*
120 * strtofflags --
121 * Take string of arguments and return file flags. Return 0 on
122 * success, 1 on failure. On failure, stringp is set to point
123 * to the offending token.
124 */
125 int
strtofflags(char ** stringp,u_long * setp,u_long * clrp)126 strtofflags(char **stringp, u_long *setp, u_long *clrp)
127 {
128 char *string, *p;
129 u_int i;
130
131 if (setp)
132 *setp = 0;
133 if (clrp)
134 *clrp = 0;
135 string = *stringp;
136 while ((p = strsep(&string, "\t ,")) != NULL) {
137 *stringp = p;
138 if (*p == '\0')
139 continue;
140 for (i = 0; i < nmappings; i++) {
141 if (strcmp(p, mapping[i].name + 2) == 0) {
142 if (mapping[i].invert) {
143 if (clrp)
144 *clrp |= mapping[i].flag;
145 } else {
146 if (setp)
147 *setp |= mapping[i].flag;
148 }
149 break;
150 } else if (strcmp(p, mapping[i].name) == 0) {
151 if (mapping[i].invert) {
152 if (setp)
153 *setp |= mapping[i].flag;
154 } else {
155 if (clrp)
156 *clrp |= mapping[i].flag;
157 }
158 break;
159 }
160 }
161 if (i == nmappings)
162 return 1;
163 }
164 return 0;
165 }
166