Fixed a segmentation fault on IRIX. Although IRIX provides the

REG_STARTEND macro, it doesn't work as expected. A simple test case is:

	printf '\0\n\0\n' | nbsed /a/d

This test does not yet work as expected, but at least it doesn't cause
segmentation faults anymore. Handling of '\0' bytes must be improved.

textproc/nbsed/Makefile

@@ -1,6 +1,7 @@
-# $NetBSD: Makefile,v 1.14 2006/07/14 16:24:28 jlam Exp $
+# $NetBSD: Makefile,v 1.15 2007/03/07 19:18:39 rillig Exp $
 
 DISTNAME=		nbsed-20040821
+PKGREVISION=		1
 CATEGORIES=		textproc pkgtools
 MASTER_SITES=		# empty
 DISTFILES=		# empty

textproc/nbsed/files/config.h.in

@@ -37,6 +37,9 @@
 /* Define to 1 if you have the <regex.h> header file. */
 #undef HAVE_REGEX_H
 
+/* Do you have a working REG_STARTEND? */
+#undef HAVE_REG_STARTEND
+
 /* Define to 1 if you have the <stdarg.h> header file. */
 #undef HAVE_STDARG_H
 

textproc/nbsed/files/configure

@@ -3765,6 +3765,66 @@ fi
 done
 
 
+echo "$as_me:$LINENO: checking for working REG_STARTEND" >&5
+echo $ECHO_N "checking for working REG_STARTEND... $ECHO_C" >&6
+if test "$cross_compiling" = yes; then
+  { { echo "$as_me:$LINENO: error: cannot run test program while cross compiling
+See \`config.log' for more details." >&5
+echo "$as_me: error: cannot run test program while cross compiling
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+#undef NDEBUG
+#include <assert.h>
+#include <regex.h>
+int main(void) {
+	regex_t re;
+	regmatch_t rm;
+
+	assert(regcomp(&re, "lo", 0) == 0);
+	rm.rm_so = 0, rm.rm_eo = 7;
+	assert(regexec(&re, "hel\0lo\n", 1, &rm, REG_STARTEND) == 0);
+	assert(rm.rm_so == 4 && rm.rm_eo == 6);
+	return 0;
+}
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_REG_STARTEND 1
+_ACEOF
+
+echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+
 echo "$as_me:$LINENO: checking for an ANSI C-conforming const" >&5
 echo $ECHO_N "checking for an ANSI C-conforming const... $ECHO_C" >&6
 if test "${ac_cv_c_const+set}" = set; then

textproc/nbsed/files/configure.ac

@@ -1,4 +1,4 @@
-dnl $Id: configure.ac,v 1.9 2004/09/12 16:50:50 jschauma Exp $
+dnl $Id: configure.ac,v 1.10 2007/03/07 19:18:39 rillig Exp $
 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ(2.57)
 AC_INIT([sed],[20040821],[agc@NetBSD.org])
@@ -33,6 +33,23 @@ AC_CHECK_FUNCS(regcomp)
 AC_CHECK_FUNCS(regexec)
 AC_CHECK_FUNCS(memcpy)
 
+AC_MSG_CHECKING([for working REG_STARTEND])
+AC_TRY_RUN([
+#undef NDEBUG
+#include <assert.h>
+#include <regex.h>
+int main(void) {
+	regex_t re;
+	regmatch_t rm;
+
+	assert(regcomp(&re, "lo", 0) == 0);
+	rm.rm_so = 0, rm.rm_eo = 7;
+	assert(regexec(&re, "hel\0lo\n", 1, &rm, REG_STARTEND) == 0);
+	assert(rm.rm_so == 4 && rm.rm_eo == 6);
+	return 0;
+}], [AC_DEFINE([HAVE_REG_STARTEND], [1], [Do you have a working REG_STARTEND?])
+AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])
+
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_C_INLINE

textproc/nbsed/files/process.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: process.c,v 1.8 2004/08/22 05:51:55 jlam Exp $	*/
+/*	$NetBSD: process.c,v 1.9 2007/03/07 19:18:39 rillig Exp $	*/
 
 /*-
  * Copyright (c) 1992, 1993, 1994
@@ -78,7 +78,7 @@
 #if 0
 static char sccsid[] = "@(#)process.c	8.6 (Berkeley) 4/20/94";
 #else
-__RCSID("$NetBSD: process.c,v 1.8 2004/08/22 05:51:55 jlam Exp $");
+__RCSID("$NetBSD: process.c,v 1.9 2007/03/07 19:18:39 rillig Exp $");
 #endif
 #endif /* not lint */
 
@@ -580,7 +580,7 @@ static inline int
 regexec_e(regex_t *preg, const char *string, int eflags, int nomatch, size_t slen)
 {
 	int eval;
-#ifndef REG_STARTEND
+#ifndef HAVE_REG_STARTEND
 	char *buf;
 #endif
 	
@@ -594,7 +594,7 @@ regexec_e(regex_t *preg, const char *string, int eflags, int nomatch, size_t sle
 	if (slen > 0 && string[slen - 1] == '\n')
 		slen--;
 
-#ifndef REG_STARTEND
+#ifndef HAVE_REG_STARTEND
 	if ((buf = malloc(slen + 1)) == NULL)
 		err(1, NULL);
 	(void)memcpy(buf, string, slen);