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)
31static 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: releng/11.0/lib/libc/gen/strtofflags.c 287797 2015-09-14 18:59:01Z rodrigc $");
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#define longestflaglen	12
45static struct {
46	char name[longestflaglen + 1];
47	char invert;
48	u_long flag;
49} const mapping[] = {
50	/* shorter names per flag first, all prefixed by "no" */
51	{ "nosappnd",		0, SF_APPEND	},
52	{ "nosappend",		0, SF_APPEND	},
53	{ "noarch",		0, SF_ARCHIVED	},
54	{ "noarchived",		0, SF_ARCHIVED	},
55	{ "noschg",		0, SF_IMMUTABLE	},
56	{ "noschange",		0, SF_IMMUTABLE	},
57	{ "nosimmutable",	0, SF_IMMUTABLE	},
58	{ "nosunlnk",		0, SF_NOUNLINK	},
59	{ "nosunlink",		0, SF_NOUNLINK	},
60#ifdef SF_SNAPSHOT
61	{ "nosnapshot",		0, SF_SNAPSHOT	},
62#endif
63	{ "nouappnd",		0, UF_APPEND	},
64	{ "nouappend",		0, UF_APPEND	},
65	{ "nouarch", 		0, UF_ARCHIVE	},
66	{ "nouarchive",		0, UF_ARCHIVE	},
67	{ "nohidden",		0, UF_HIDDEN	},
68	{ "nouhidden",		0, UF_HIDDEN	},
69	{ "nouchg",		0, UF_IMMUTABLE	},
70	{ "nouchange",		0, UF_IMMUTABLE	},
71	{ "nouimmutable",	0, UF_IMMUTABLE	},
72	{ "nodump",		1, UF_NODUMP	},
73	{ "nouunlnk",		0, UF_NOUNLINK	},
74	{ "nouunlink",		0, UF_NOUNLINK	},
75	{ "nooffline",		0, UF_OFFLINE	},
76	{ "nouoffline",		0, UF_OFFLINE	},
77	{ "noopaque",		0, UF_OPAQUE	},
78	{ "nordonly",		0, UF_READONLY	},
79	{ "nourdonly",		0, UF_READONLY	},
80	{ "noreadonly",		0, UF_READONLY	},
81	{ "noureadonly",	0, UF_READONLY	},
82	{ "noreparse",		0, UF_REPARSE	},
83	{ "noureparse",		0, UF_REPARSE	},
84	{ "nosparse",		0, UF_SPARSE	},
85	{ "nousparse",		0, UF_SPARSE	},
86	{ "nosystem",		0, UF_SYSTEM	},
87	{ "nousystem",		0, UF_SYSTEM	}
88};
89#define nmappings	(sizeof(mapping) / sizeof(mapping[0]))
90
91/*
92 * fflagstostr --
93 *	Convert file flags to a comma-separated string.  If no flags
94 *	are set, return the empty string.
95 */
96char *
97fflagstostr(u_long flags)
98{
99	char *string;
100	const char *sp;
101	char *dp;
102	u_long setflags;
103	u_int i;
104
105	if ((string = (char *)malloc(nmappings * (longestflaglen + 1))) == NULL)
106		return (NULL);
107
108	setflags = flags;
109	dp = string;
110	for (i = 0; i < nmappings; i++) {
111		if (setflags & mapping[i].flag) {
112			if (dp > string)
113				*dp++ = ',';
114			for (sp = mapping[i].invert ? mapping[i].name :
115			    mapping[i].name + 2; *sp; *dp++ = *sp++) ;
116			setflags &= ~mapping[i].flag;
117		}
118	}
119	*dp = '\0';
120	return (string);
121}
122
123/*
124 * strtofflags --
125 *	Take string of arguments and return file flags.  Return 0 on
126 *	success, 1 on failure.  On failure, stringp is set to point
127 *	to the offending token.
128 */
129int
130strtofflags(char **stringp, u_long *setp, u_long *clrp)
131{
132	char *string, *p;
133	int i;
134
135	if (setp)
136		*setp = 0;
137	if (clrp)
138		*clrp = 0;
139	string = *stringp;
140	while ((p = strsep(&string, "\t ,")) != NULL) {
141		*stringp = p;
142		if (*p == '\0')
143			continue;
144		for (i = 0; i < nmappings; i++) {
145			if (strcmp(p, mapping[i].name + 2) == 0) {
146				if (mapping[i].invert) {
147					if (clrp)
148						*clrp |= mapping[i].flag;
149				} else {
150					if (setp)
151						*setp |= mapping[i].flag;
152				}
153				break;
154			} else if (strcmp(p, mapping[i].name) == 0) {
155				if (mapping[i].invert) {
156					if (setp)
157						*setp |= mapping[i].flag;
158				} else {
159					if (clrp)
160						*clrp |= mapping[i].flag;
161				}
162				break;
163			}
164		}
165		if (i == nmappings)
166			return 1;
167	}
168	return 0;
169}
170