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 * 4. 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
30 #if defined(LIBC_SCCS) && !defined(lint)
31 static char sccsid[] = "@(#)stat_flags.c 8.1 (Berkeley) 5/31/93";
32 #endif /* LIBC_SCCS and not lint */
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: stable/9/lib/libc/gen/strtofflags.c 165903 2007-01-09 00:28:16Z imp $");
35
36 #include <sys/types.h>
37 #include <sys/stat.h>
38
39 #include <stddef.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43
44 static struct {
45 char *name;
46 u_long flag;
47 int invert;
48 } mapping[] = {
49 /* shorter names per flag first, all prefixed by "no" */
50 { "nosappnd", SF_APPEND, 0 },
51 { "nosappend", SF_APPEND, 0 },
52 { "noarch", SF_ARCHIVED, 0 },
53 { "noarchived", SF_ARCHIVED, 0 },
54 { "noschg", SF_IMMUTABLE, 0 },
55 { "noschange", SF_IMMUTABLE, 0 },
56 { "nosimmutable", SF_IMMUTABLE, 0 },
57 { "nosunlnk", SF_NOUNLINK, 0 },
58 { "nosunlink", SF_NOUNLINK, 0 },
59 #ifdef SF_SNAPSHOT
60 { "nosnapshot", SF_SNAPSHOT, 0 },
61 #endif
62 { "nouappnd", UF_APPEND, 0 },
63 { "nouappend", UF_APPEND, 0 },
64 { "nouchg", UF_IMMUTABLE, 0 },
65 { "nouchange", UF_IMMUTABLE, 0 },
66 { "nouimmutable", UF_IMMUTABLE, 0 },
67 { "nodump", UF_NODUMP, 1 },
68 { "noopaque", UF_OPAQUE, 0 },
69 { "nouunlnk", UF_NOUNLINK, 0 },
70 { "nouunlink", UF_NOUNLINK, 0 }
71 };
72 #define longestflaglen 12
73 #define nmappings (sizeof(mapping) / sizeof(mapping[0]))
74
75 /*
76 * fflagstostr --
77 * Convert file flags to a comma-separated string. If no flags
78 * are set, return the empty string.
79 */
80 char *
fflagstostr(flags)81 fflagstostr(flags)
82 u_long flags;
83 {
84 char *string;
85 char *sp, *dp;
86 u_long setflags;
87 int i;
88
89 if ((string = (char *)malloc(nmappings * (longestflaglen + 1))) == NULL)
90 return (NULL);
91
92 setflags = flags;
93 dp = string;
94 for (i = 0; i < nmappings; i++) {
95 if (setflags & mapping[i].flag) {
96 if (dp > string)
97 *dp++ = ',';
98 for (sp = mapping[i].invert ? mapping[i].name :
99 mapping[i].name + 2; *sp; *dp++ = *sp++) ;
100 setflags &= ~mapping[i].flag;
101 }
102 }
103 *dp = '\0';
104 return (string);
105 }
106
107 /*
108 * strtofflags --
109 * Take string of arguments and return file flags. Return 0 on
110 * success, 1 on failure. On failure, stringp is set to point
111 * to the offending token.
112 */
113 int
strtofflags(stringp,setp,clrp)114 strtofflags(stringp, setp, clrp)
115 char **stringp;
116 u_long *setp, *clrp;
117 {
118 char *string, *p;
119 int i;
120
121 if (setp)
122 *setp = 0;
123 if (clrp)
124 *clrp = 0;
125 string = *stringp;
126 while ((p = strsep(&string, "\t ,")) != NULL) {
127 *stringp = p;
128 if (*p == '\0')
129 continue;
130 for (i = 0; i < nmappings; i++) {
131 if (strcmp(p, mapping[i].name + 2) == 0) {
132 if (mapping[i].invert) {
133 if (clrp)
134 *clrp |= mapping[i].flag;
135 } else {
136 if (setp)
137 *setp |= mapping[i].flag;
138 }
139 break;
140 } else if (strcmp(p, mapping[i].name) == 0) {
141 if (mapping[i].invert) {
142 if (setp)
143 *setp |= mapping[i].flag;
144 } else {
145 if (clrp)
146 *clrp |= mapping[i].flag;
147 }
148 break;
149 }
150 }
151 if (i == nmappings)
152 return 1;
153 }
154 return 0;
155 }
156