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diff --git a/contrib/netbsd-tests/usr.bin/sed/t_sed.sh b/contrib/netbsd-tests/usr.bin/sed/t_sed.sh
new file mode 100755
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+++ b/contrib/netbsd-tests/usr.bin/sed/t_sed.sh
@@ -0,0 +1,127 @@
+# $NetBSD: t_sed.sh,v 1.5 2013/03/14 06:03:44 jmmv Exp $
+#
+# Copyright (c) 2012 The NetBSD Foundation, Inc.
+# All rights reserved.
+#
+# This code is derived from software contributed to The NetBSD Foundation
+# by Jukka Ruohonen and David A. Holland.
+#
+# 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.
+#
+# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+#
+
+atf_test_case c2048
+c2048_head() {
+	atf_set "descr" "Test that sed(1) does not fail when the " \
+			"2048'th character is a backslash (PR bin/25899)"
+}
+
+c2048_body() {
+
+	atf_check -s exit:0 -o inline:'foo\n' -e empty \
+		-x "echo foo | sed -f $(atf_get_srcdir)/d_c2048.in"
+}
+
+atf_test_case emptybackref
+emptybackref_head() {
+	atf_set "descr" "Test that sed(1) handles " \
+			"empty back references (PR bin/28126)"
+}
+
+emptybackref_body() {
+
+	atf_check -o inline:"foo1bar1\n" \
+		-x "echo foo1bar1 | sed -ne '/foo\(.*\)bar\1/p'"
+
+	atf_expect_fail "PR bin/28126"
+
+	atf_check -o inline:"foobar\n" \
+		-x "echo foobar | sed -ne '/foo\(.*\)bar\1/p'"
+}
+
+atf_test_case longlines
+longlines_head() {
+	atf_set "descr" "Test that sed(1) handles " \
+			"long lines correctly (PR bin/42261)"
+}
+
+longlines_body() {
+
+	str=$(awk 'BEGIN {while(x<2043){printf "x";x++}}')
+	echo $str > input
+
+	atf_check -o save:output -x "echo x | sed s,x,${str},g"
+	atf_check -s exit:0 -o empty -e empty -x "diff input output"
+}
+
+atf_test_case rangeselection
+rangeselection_head() {
+	atf_set "descr" "Test that sed(1) handles " \
+			"range selection correctly"
+}
+
+rangeselection_body() {
+	# basic cases
+	atf_check -o inline:"D\n" \
+		-x "printf 'A\nB\nC\nD\n' | sed '1,3d'"
+	atf_check -o inline:"A\n" \
+		-x "printf 'A\nB\nC\nD\n' | sed '2,4d'"
+	# two nonoverlapping ranges
+	atf_check -o inline:"C\n" \
+		-x "printf 'A\nB\nC\nD\nE\n' | sed '1,2d;4,5d'"
+	# overlapping ranges; the first prevents the second from being entered
+	atf_check -o inline:"D\nE\n" \
+		-x "printf 'A\nB\nC\nD\nE\n' | sed '1,3d;3,5d'"
+	# the 'n' command can also prevent ranges from being entered
+	atf_check -o inline:"B\nB\nC\nD\n" \
+		-x "printf 'A\nB\nC\nD\n' | sed '1,3s/A/B/;1,3n;1,3s/B/C/'"
+	atf_check -o inline:"B\nC\nC\nD\n" \
+		-x "printf 'A\nB\nC\nD\n' | sed '1,3s/A/B/;1,3n;2,3s/B/C/'"
+
+	# basic cases using regexps
+	atf_check -o inline:"D\n" \
+		-x "printf 'A\nB\nC\nD\n' | sed '/A/,/C/d'"
+	atf_check -o inline:"A\n" \
+		-x "printf 'A\nB\nC\nD\n' | sed '/B/,/D/d'"
+	# two nonoverlapping ranges
+	atf_check -o inline:"C\n" \
+		-x "printf 'A\nB\nC\nD\nE\n' | sed '/A/,/B/d;/D/,/E/d'"
+	# two overlapping ranges; the first blocks the second as above
+	atf_check -o inline:"D\nE\n" \
+		-x "printf 'A\nB\nC\nD\nE\n' | sed '/A/,/C/d;/C/,/E/d'"
+	# the 'n' command makes some lines invisible to downstreap regexps
+	atf_check -o inline:"B\nC\nC\nD\n" \
+		-x "printf 'A\nB\nC\nD\n' | sed '/A/,/C/s/A/B/;1,3n;/B/,/C/s/B/C/'"
+
+	# a range ends at the *first* matching end line
+	atf_check -o inline:"D\nC\n" \
+		-x "printf 'A\nB\nC\nD\nC\n' | sed '/A/,/C/d'"
+	# another matching start line within the range has no effect
+	atf_check -o inline:"D\nC\n" \
+		-x "printf 'A\nB\nA\nC\nD\nC\n' | sed '/A/,/C/d'"
+}
+
+atf_init_test_cases() {
+	atf_add_test_case c2048
+	atf_add_test_case emptybackref
+	atf_add_test_case longlines
+	atf_add_test_case rangeselection
+}