2 * Copyright (c) 1992 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
6 * James da Silva at the University of Maryland at College Park.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * Compatibility routines that implement the old re_comp/re_exec interface in
39 * terms of the regcomp/regexec interface. It's possible that some programs
40 * rely on dark corners of re_comp/re_exec and won't work with this version,
41 * but most programs should be fine.
44 #if defined(LIBC_SCCS) && !defined(lint)
45 static char sccsid[] = "@(#)regex.c 5.1 (Berkeley) 3/29/92";
46 #endif /* LIBC_SCCS and not lint */
48 #include <sys/types.h>
55 static regexp *re_regexp;
57 static char *re_errstr;
63 if (s == NULL || *s == '\0') {
64 if (re_regexp == NULL)
65 return "no previous regular expression";
73 re_regexp = regcomp(s);
74 return (re_goterr ? re_errstr : NULL);
84 rc = regexec(re_regexp, s);
85 return (re_goterr ? -1 : rc);
95 re_errstr = strdup(s);