- Document ttyname_r().
[dragonfly.git] / lib / libc / gen / strtofflags.c
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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.
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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 $
b0e25abd 35 * $DragonFly: src/lib/libc/gen/strtofflags.c,v 1.4 2005/11/19 22:32:53 swildner Exp $
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36 */
37
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38#include <sys/types.h>
39#include <sys/stat.h>
40
41#include <stddef.h>
42#include <stdlib.h>
43#include <string.h>
b0e25abd 44#include <unistd.h>
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45
46static struct {
47 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 { "nosimmutable", SF_IMMUTABLE, 0 },
59 { "nosunlnk", SF_NOUNLINK, 0 },
60 { "nosunlink", SF_NOUNLINK, 0 },
61 { "nouappnd", UF_APPEND, 0 },
62 { "nouappend", UF_APPEND, 0 },
63 { "nouchg", UF_IMMUTABLE, 0 },
64 { "nouchange", UF_IMMUTABLE, 0 },
65 { "nouimmutable", UF_IMMUTABLE, 0 },
66 { "nodump", UF_NODUMP, 1 },
67 { "noopaque", UF_OPAQUE, 0 },
68 { "nouunlnk", UF_NOUNLINK, 0 },
69 { "nouunlink", UF_NOUNLINK, 0 }
70};
71#define longestflaglen 12
72#define nmappings (sizeof(mapping) / sizeof(mapping[0]))
73
74/*
75 * fflagstostr --
76 * Convert file flags to a comma-separated string. If no flags
77 * are set, return the empty string.
78 */
79char *
0f52d283 80fflagstostr(u_long flags)
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81{
82 char *string;
83 char *sp, *dp;
84 u_long setflags;
85 int i;
86
87 if ((string = (char *)malloc(nmappings * (longestflaglen + 1))) == NULL)
88 return (NULL);
89
90 setflags = flags;
91 dp = string;
92 for (i = 0; i < nmappings; i++) {
93 if (setflags & mapping[i].flag) {
94 if (dp > string)
95 *dp++ = ',';
96 for (sp = mapping[i].invert ? mapping[i].name :
97 mapping[i].name + 2; *sp; *dp++ = *sp++) ;
98 setflags &= ~mapping[i].flag;
99 }
100 }
101 *dp = '\0';
102 return (string);
103}
104
105/*
106 * strtofflags --
107 * Take string of arguments and return file flags. Return 0 on
108 * success, 1 on failure. On failure, stringp is set to point
109 * to the offending token.
110 */
111int
0f52d283 112strtofflags(char **stringp, u_long *setp, u_long *clrp)
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113{
114 char *string, *p;
115 int i;
116
117 if (setp)
118 *setp = 0;
119 if (clrp)
120 *clrp = 0;
121 string = *stringp;
122 while ((p = strsep(&string, "\t ,")) != NULL) {
123 *stringp = p;
124 if (*p == '\0')
125 continue;
126 for (i = 0; i < nmappings; i++) {
127 if (strcmp(p, mapping[i].name + 2) == 0) {
128 if (mapping[i].invert) {
129 if (clrp)
130 *clrp |= mapping[i].flag;
131 } else {
132 if (setp)
133 *setp |= mapping[i].flag;
134 }
135 break;
136 } else if (strcmp(p, mapping[i].name) == 0) {
137 if (mapping[i].invert) {
138 if (setp)
139 *setp |= mapping[i].flag;
140 } else {
141 if (clrp)
142 *clrp |= mapping[i].flag;
143 }
144 break;
145 }
146 }
147 if (i == nmappings)
148 return 1;
149 }
150 return 0;
151}