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 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 * 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