1 /*
2 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
3 * Copyright (c) 1992, 1993, 1994 Henry Spencer.
4 * Copyright (c) 1992, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Henry Spencer.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include "lint.h"
36 #include "file64.h"
37 #include <sys/types.h>
38 #include <stdio.h>
39 #include <string.h>
40 #include <limits.h>
41 #include <stdlib.h>
42 #include <regex.h>
43
44 #include "utils.h"
45 #include "../gen/_libc_gettext.h"
46
47 static const char *regatoi(const regex_t *preg, char *localbuf);
48
49 #define RERR(x, msg) { x, #x, msg }
50
51 static struct rerr {
52 int code;
53 const char *name;
54 const char *explain;
55 } rerrs[] = {
56 RERR(REG_NOMATCH, "regexec() failed to match"),
57 RERR(REG_BADPAT, "invalid regular expression"),
58 RERR(REG_ECOLLATE, "invalid collating element"),
59 RERR(REG_ECTYPE, "invalid character class"),
60 RERR(REG_EESCAPE, "trailing backslash (\\)"),
61 RERR(REG_ESUBREG, "invalid backreference number"),
62 RERR(REG_EBRACK, "brackets ([ ]) not balanced"),
63 RERR(REG_EPAREN, "parentheses not balanced"),
64 RERR(REG_EBRACE, "braces not balanced"),
65 RERR(REG_BADBR, "invalid repetition count(s)"),
66 RERR(REG_ERANGE, "invalid character range"),
67 RERR(REG_ESPACE, "out of memory"),
68 RERR(REG_BADRPT, "repetition-operator operand invalid"),
69 #ifdef REG_EMPTY
70 RERR(REG_EMPTY, "empty (sub)expression"),
71 #endif
72 RERR(REG_EFATAL, "fatal internal error"),
73 #ifdef REG_INVARG
74 RERR(REG_INVARG, "invalid argument to regex routine"),
75 #endif
76 RERR(REG_ECHAR, "illegal byte sequence"),
77 RERR(REG_ENOSYS, "function not supported"),
78 RERR(REG_STACK, "backtrack stack overflow"),
79 RERR(REG_ENSUB, "more than 9 \\( \\) pairs"),
80 RERR(REG_ENEWLINE, "\n found before end of pattern"),
81 {0, "", "*** unknown regexp error code ***"}
82 };
83
84
85 /*
86 * regerror - the interface to error numbers
87 */
88 /* ARGSUSED */
89 size_t
regerror(int errcode,const regex_t * _RESTRICT_KYWD preg,char * _RESTRICT_KYWD errbuf,size_t errbuf_size)90 regerror(int errcode, const regex_t *_RESTRICT_KYWD preg,
91 char *_RESTRICT_KYWD errbuf, size_t errbuf_size)
92 {
93 struct rerr *r;
94 size_t len;
95 int target = errcode &~ REG_ITOA;
96 const char *s;
97 char convbuf[50];
98
99 if (errcode == REG_ATOI) {
100 s = regatoi(preg, convbuf);
101 } else {
102 for (r = rerrs; r->code != 0; r++) {
103 if (r->code == target)
104 break;
105 }
106
107 if (errcode®_ITOA) {
108 if (r->code != 0)
109 (void) strcpy(convbuf, r->name);
110 else
111 (void) sprintf(convbuf, "REG_0x%x", target);
112 assert(strlen(convbuf) < sizeof (convbuf));
113 s = convbuf;
114 } else {
115 s = _libc_gettext(r->explain);
116 }
117 }
118
119 len = strlen(s) + 1;
120 if (errbuf_size > 0) {
121 if (errbuf_size > len) {
122 (void) strcpy(errbuf, s);
123 } else {
124 (void) strncpy(errbuf, s, errbuf_size-1);
125 errbuf[errbuf_size-1] = '\0';
126 }
127 }
128
129 return (len);
130 }
131
132 /*
133 * regatoi - internal routine to implement REG_ATOI
134 */
135 static const char *
regatoi(const regex_t * preg,char * localbuf)136 regatoi(const regex_t *preg, char *localbuf)
137 {
138 struct rerr *r;
139
140 for (r = rerrs; r->code != 0; r++) {
141 if (strcmp(r->name, preg->re_endp) == 0)
142 break;
143 }
144 if (r->code == 0)
145 return ("0");
146
147 (void) sprintf(localbuf, "%d", r->code);
148 return (localbuf);
149 }
150