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
41static 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 */
92char *
93fflagstostr(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 */
125int
126strtofflags(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