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 { "nousystem", 0, UF_SYSTEM }
84 };
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 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