1 files changed, 92 insertions, 0 deletions
diff --git a/lib/libcompat/4.3/re_comp.c b/lib/libcompat/4.3/re_comp.c
new file mode 100644
index 0000000..dbe57b1
--- /dev/null
+++ b/lib/libcompat/4.3/re_comp.c
@@ -0,0 +1,92 @@
+/*-
+ * Copyright (c) 1992 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * James da Silva at the University of Maryland at College Park.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Compatibility routines that implement the old re_comp/re_exec interface in
+ * terms of the regcomp/regexec interface.  It's possible that some programs
+ * rely on dark corners of re_comp/re_exec and won't work with this version,
+ * but most programs should be fine.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)regex.c	5.1 (Berkeley) 3/29/92";
+#endif /* LIBC_SCCS and not lint */
+
+#include <regex.h>
+#include <stddef.h>
+#include <unistd.h>
+
+static regex_t re_regexp;
+static int re_gotexp;
+static char re_errstr[100];
+
+char *
+re_comp(const char *s)
+{
+	int rc;
+
+	if (s == NULL || *s == '\0') {
+		if (!re_gotexp)
+			return __DECONST(char *,
+			    "no previous regular expression");
+		return (NULL);
+	}
+
+	if (re_gotexp) {
+		regfree(&re_regexp);
+		re_gotexp = 0;
+	}
+
+	rc = regcomp(&re_regexp, s, REG_EXTENDED);
+	if (rc == 0) {
+		re_gotexp = 1;
+		return (NULL);
+	}
+
+	regerror(rc, &re_regexp, re_errstr, sizeof(re_errstr));
+	re_errstr[sizeof(re_errstr) - 1] = '\0';
+	return (re_errstr);
+}
+
+int
+re_exec(const char *s)
+{
+	int rc;
+
+	if (!re_gotexp)
+		return (-1);
+	rc = regexec(&re_regexp, s, 0, NULL, 0);
+	return (rc == 0 ? 1 : 0);
+}