1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include "libuutil_common.h"
28
29 #include <string.h>
30
31 /*
32 * We require names of the form:
33 * [provider,]identifier[/[provider,]identifier]...
34 *
35 * Where provider is either a stock symbol (SUNW) or a java-style reversed
36 * domain name (com.sun).
37 *
38 * Both providers and identifiers must start with a letter, and may
39 * only contain alphanumerics, dashes, and underlines. Providers
40 * may also contain periods.
41 *
42 * Note that we do _not_ use the macros in <ctype.h>, since they are affected
43 * by the current locale settings.
44 */
45
46 #define IS_ALPHA(c) \
47 (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z'))
48
49 #define IS_DIGIT(c) \
50 ((c) >= '0' && (c) <= '9')
51
52 static int
is_valid_ident(const char * s,const char * e,int allowdot)53 is_valid_ident(const char *s, const char *e, int allowdot)
54 {
55 char c;
56
57 if (s >= e)
58 return (0); /* name is empty */
59
60 c = *s++;
61 if (!IS_ALPHA(c))
62 return (0); /* does not start with letter */
63
64 while (s < e && (c = *s++) != 0) {
65 if (IS_ALPHA(c) || IS_DIGIT(c) || c == '-' || c == '_' ||
66 (allowdot && c == '.'))
67 continue;
68 return (0); /* invalid character */
69 }
70 return (1);
71 }
72
73 static int
is_valid_component(const char * b,const char * e,uint_t flags)74 is_valid_component(const char *b, const char *e, uint_t flags)
75 {
76 char *sp;
77
78 if (flags & UU_NAME_DOMAIN) {
79 sp = strchr(b, ',');
80 if (sp != NULL && sp < e) {
81 if (!is_valid_ident(b, sp, 1))
82 return (0);
83 b = sp + 1;
84 }
85 }
86
87 return (is_valid_ident(b, e, 0));
88 }
89
90 int
uu_check_name(const char * name,uint_t flags)91 uu_check_name(const char *name, uint_t flags)
92 {
93 const char *end = name + strlen(name);
94 const char *p;
95
96 if (flags & ~(UU_NAME_DOMAIN | UU_NAME_PATH)) {
97 uu_set_error(UU_ERROR_UNKNOWN_FLAG);
98 return (-1);
99 }
100
101 if (!(flags & UU_NAME_PATH)) {
102 if (!is_valid_component(name, end, flags))
103 goto bad;
104 return (0);
105 }
106
107 while ((p = strchr(name, '/')) != NULL) {
108 if (!is_valid_component(name, p - 1, flags))
109 goto bad;
110 name = p + 1;
111 }
112 if (!is_valid_component(name, end, flags))
113 goto bad;
114
115 return (0);
116
117 bad:
118 uu_set_error(UU_ERROR_INVALID_ARGUMENT);
119 return (-1);
120 }
121