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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 | ||
e5dc681a | 27 | |
34dc7c2f BB |
28 | |
29 | #include "libuutil_common.h" | |
30 | ||
31 | #include <string.h> | |
32 | ||
33 | /* | |
34 | * We require names of the form: | |
35 | * [provider,]identifier[/[provider,]identifier]... | |
36 | * | |
37 | * Where provider is either a stock symbol (SUNW) or a java-style reversed | |
38 | * domain name (com.sun). | |
39 | * | |
40 | * Both providers and identifiers must start with a letter, and may | |
41 | * only contain alphanumerics, dashes, and underlines. Providers | |
42 | * may also contain periods. | |
43 | * | |
44 | * Note that we do _not_ use the macros in <ctype.h>, since they are affected | |
45 | * by the current locale settings. | |
46 | */ | |
47 | ||
48 | #define IS_ALPHA(c) \ | |
49 | (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z')) | |
50 | ||
51 | #define IS_DIGIT(c) \ | |
52 | ((c) >= '0' && (c) <= '9') | |
53 | ||
54 | static int | |
55 | is_valid_ident(const char *s, const char *e, int allowdot) | |
56 | { | |
57 | char c; | |
58 | ||
59 | if (s >= e) | |
60 | return (0); /* name is empty */ | |
61 | ||
62 | c = *s++; | |
63 | if (!IS_ALPHA(c)) | |
64 | return (0); /* does not start with letter */ | |
65 | ||
66 | while (s < e && (c = *s++) != 0) { | |
67 | if (IS_ALPHA(c) || IS_DIGIT(c) || c == '-' || c == '_' || | |
68 | (allowdot && c == '.')) | |
69 | continue; | |
70 | return (0); /* invalid character */ | |
71 | } | |
72 | return (1); | |
73 | } | |
74 | ||
75 | static int | |
76 | is_valid_component(const char *b, const char *e, uint_t flags) | |
77 | { | |
78 | char *sp; | |
79 | ||
80 | if (flags & UU_NAME_DOMAIN) { | |
81 | sp = strchr(b, ','); | |
82 | if (sp != NULL && sp < e) { | |
83 | if (!is_valid_ident(b, sp, 1)) | |
84 | return (0); | |
85 | b = sp + 1; | |
86 | } | |
87 | } | |
88 | ||
89 | return (is_valid_ident(b, e, 0)); | |
90 | } | |
91 | ||
92 | int | |
93 | uu_check_name(const char *name, uint_t flags) | |
94 | { | |
95 | const char *end = name + strlen(name); | |
96 | const char *p; | |
97 | ||
98 | if (flags & ~(UU_NAME_DOMAIN | UU_NAME_PATH)) { | |
99 | uu_set_error(UU_ERROR_UNKNOWN_FLAG); | |
100 | return (-1); | |
101 | } | |
102 | ||
103 | if (!(flags & UU_NAME_PATH)) { | |
104 | if (!is_valid_component(name, end, flags)) | |
105 | goto bad; | |
106 | return (0); | |
107 | } | |
108 | ||
109 | while ((p = strchr(name, '/')) != NULL) { | |
110 | if (!is_valid_component(name, p - 1, flags)) | |
111 | goto bad; | |
112 | name = p + 1; | |
113 | } | |
114 | if (!is_valid_component(name, end, flags)) | |
115 | goto bad; | |
116 | ||
117 | return (0); | |
118 | ||
119 | bad: | |
120 | uu_set_error(UU_ERROR_INVALID_ARGUMENT); | |
121 | return (-1); | |
122 | } |