From b6fca5544747e5f71c6b22f9bc0086d727d57509 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Thu, 2 Jul 2026 10:26:09 +0100
Subject: [PATCH] Add tests for input path.

---
 regress/input-common.inc      | 176 ++++++++++++++++++++++++++++++++++
 regress/input-cursor.sh       |  39 ++++++++
 regress/input-edit.sh         |  54 +++++++++++
 regress/input-malformed.sh    |  42 ++++++++
 regress/input-modes.sh        |  15 +++
 regress/input-osc.sh          |  37 +++++++
 regress/input-raw-controls.sh |  84 ++++++++++++++++
 regress/input-raw-cursor.sh   |  33 +++++++
 regress/input-raw-edit.sh     |  47 +++++++++
 regress/input-raw-history.sh  |  23 +++++
 regress/input-raw-reflow.sh   |  21 ++++
 regress/input-raw-scroll.sh   |  39 ++++++++
 regress/input-raw-sgr.sh      |  39 ++++++++
 regress/input-raw-unicode.sh  |  82 ++++++++++++++++
 regress/input-raw-wrap.sh     |  28 ++++++
 regress/input-replies.sh      |  94 ++++++++++++++++++
 regress/input-requests.sh     | 117 ++++++++++++++++++++++
 regress/input-scroll.sh       |  73 ++++++++++++++
 regress/input-sgr.sh          |  26 +++++
 regress/input-unicode.sh      |  45 +++++++++
 20 files changed, 1114 insertions(+)
 create mode 100644 regress/input-common.inc
 create mode 100644 regress/input-cursor.sh
 create mode 100644 regress/input-edit.sh
 create mode 100644 regress/input-malformed.sh
 create mode 100644 regress/input-modes.sh
 create mode 100644 regress/input-osc.sh
 create mode 100644 regress/input-raw-controls.sh
 create mode 100644 regress/input-raw-cursor.sh
 create mode 100644 regress/input-raw-edit.sh
 create mode 100644 regress/input-raw-history.sh
 create mode 100644 regress/input-raw-reflow.sh
 create mode 100644 regress/input-raw-scroll.sh
 create mode 100644 regress/input-raw-sgr.sh
 create mode 100644 regress/input-raw-unicode.sh
 create mode 100644 regress/input-raw-wrap.sh
 create mode 100644 regress/input-replies.sh
 create mode 100644 regress/input-requests.sh
 create mode 100644 regress/input-scroll.sh
 create mode 100644 regress/input-sgr.sh
 create mode 100644 regress/input-unicode.sh

diff --git a/regress/input-common.inc b/regress/input-common.inc
new file mode 100644
index 000000000..96eec1f09
--- /dev/null
+++ b/regress/input-common.inc
@@ -0,0 +1,176 @@
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -Ltest -f/dev/null"
+
+TMP=$(mktemp)
+EXP=$(mktemp)
+trap 'rm -f "$TMP" "$EXP"; $TMUX kill-server 2>/dev/null' 0 1 15
+
+exit_status=0
+
+fail()
+{
+	echo "FAIL: $1"
+	diff -u "$EXP" "$TMP"
+	exit_status=1
+}
+
+start_pane()
+{
+	start_pane_hlimit "$1" "$2" "$3" "$4" 0
+}
+
+start_pane_history()
+{
+	start_pane_hlimit "$1" "$2" "$3" "$4" 2000
+}
+
+start_pane_hlimit()
+{
+	name=$1
+	sx=$2
+	sy=$3
+	seq=$4
+	hlimit=$5
+
+	$TMUX kill-server 2>/dev/null
+	sleep 0.1
+	$TMUX new-session -d -x 1 -y 1 -s test-setup "sleep 2" || exit 1
+	$TMUX set-option -g history-limit "$hlimit" || exit 1
+	$TMUX new-session -d -x "$sx" -y "$sy" -s "$name" \
+	    "printf '$seq'; sleep 2" || exit 1
+	$TMUX kill-session -t test-setup
+	sleep 0.3
+}
+
+start_cmd()
+{
+	name=$1
+	sx=$2
+	sy=$3
+	cmd=$4
+
+	$TMUX kill-server 2>/dev/null
+	sleep 0.1
+	$TMUX new-session -d -x "$sx" -y "$sy" -s "$name" "$cmd" || exit 1
+	sleep 0.3
+}
+
+normalize_capture()
+{
+	sed 's/[	 ]*$//' |
+	    awk '{ line[NR] = $0; if ($0 != "") last = NR }
+	        END { for (i = 1; i <= last; i++) print line[i] }'
+}
+
+capture_grid()
+{
+	$TMUX capture-pane -pN -t "$1:" -S 0 -E - | normalize_capture
+}
+
+check_capture()
+{
+	name=$1
+	expected=$2
+
+	capture_grid "$name" >"$TMP"
+	printf "%s\n" "$expected" >"$EXP"
+	cmp "$TMP" "$EXP" || fail "$name"
+}
+
+check_cursor()
+{
+	name=$1
+	expected=$2
+
+	actual=$($TMUX display-message -p -t "$name:" '#{cursor_x},#{cursor_y}')
+	if [ "$actual" != "$expected" ]; then
+		printf "%s\n" "$expected" >"$EXP"
+		printf "%s\n" "$actual" >"$TMP"
+		fail "$name cursor"
+	fi
+}
+
+check_flags()
+{
+	name=$1
+	expected=$2
+
+	$TMUX capture-pane -pNF -t "$name:" -S 0 -E - |
+	    normalize_capture |
+	    awk '$0 != "-"' >"$TMP"
+	printf "%s\n" "$expected" >"$EXP"
+	cmp "$TMP" "$EXP" || fail "$name flags"
+}
+
+check_joined()
+{
+	name=$1
+	expected=$2
+
+	$TMUX capture-pane -pNJ -t "$name:" -S 0 -E - |
+	    normalize_capture >"$TMP"
+	printf "%s\n" "$expected" >"$EXP"
+	cmp "$TMP" "$EXP" || fail "$name joined"
+}
+
+capture_raw()
+{
+	$TMUX capture-pane -pR -t "$1:"
+}
+
+capture_raw_used()
+{
+	capture_raw "$1" |
+	    awk '/^(G|	L)/ || /^		C/ && $3 !~ /^data=\(1,1, \)$/'
+}
+
+check_raw()
+{
+	name=$1
+	expected=$2
+
+	capture_raw "$name" >"$TMP"
+	printf "%s\n" "$expected" >"$EXP"
+	cmp "$TMP" "$EXP" || fail "$name raw"
+}
+
+check_raw_used()
+{
+	name=$1
+	expected=$2
+
+	capture_raw_used "$name" >"$TMP"
+	printf "%s\n" "$expected" >"$EXP"
+	cmp "$TMP" "$EXP" || fail "$name raw used"
+}
+
+check_raw_has()
+{
+	name=$1
+	shift
+
+	capture_raw "$name" >"$TMP"
+	for expected in "$@"; do
+		if ! grep -Fqx "$expected" "$TMP"; then
+			printf "%s\n" "$expected" >"$EXP"
+			fail "$name raw missing"
+		fi
+	done
+}
+
+check_raw_matches()
+{
+	name=$1
+	shift
+
+	capture_raw "$name" >"$TMP"
+	for expected in "$@"; do
+		if ! grep -Eq "$expected" "$TMP"; then
+			printf "%s\n" "$expected" >"$EXP"
+			fail "$name raw missing"
+		fi
+	done
+}
diff --git a/regress/input-cursor.sh b/regress/input-cursor.sh
new file mode 100644
index 000000000..51a825fc1
--- /dev/null
+++ b/regress/input-cursor.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane cursor 10 3 'ABCDE\r\033[2Cxy\033[1D!\033[4GZ\n'
+check_capture cursor 'ABxZE'
+check_cursor cursor '0,1'
+
+start_pane saverc 10 3 'abc\0337\033[2;5HXY\0338Z\n'
+check_capture saverc 'abcZ
+    XY'
+check_cursor saverc '0,1'
+
+start_pane hvp 10 4 'A\033[3dB\033[5GC\033[2;2fD\n'
+check_capture hvp 'A
+ D
+ B  C'
+check_cursor hvp '0,2'
+
+start_pane cursorlines 8 4 'A\033[2BB\033[1FC\033[1AD\n'
+check_capture cursorlines 'AD
+C
+ B'
+check_cursor cursorlines '0,1'
+
+start_pane tabs 12 3 'a\tb\n'
+check_capture tabs 'a	b'
+check_cursor tabs '0,1'
+
+start_pane tabclear 12 3 '\033H\ta\033[3g\r\tb\n'
+check_capture tabclear '	a  b'
+check_cursor tabclear '0,1'
+
+start_pane cbt 16 3 '0123456789\r\033[10C\033[Zx\n'
+check_capture cbt '01234567x9'
+check_cursor cbt '0,1'
+
+$TMUX kill-server 2>/dev/null
+exit $exit_status
diff --git a/regress/input-edit.sh b/regress/input-edit.sh
new file mode 100644
index 000000000..3c8ad3cef
--- /dev/null
+++ b/regress/input-edit.sh
@@ -0,0 +1,54 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane dch 10 3 'abcdef\r\033[3C\033[2PXY\n'
+check_capture dch 'abcXY'
+
+start_pane ich 10 3 'abcdef\r\033[3C\033[2@XY\n'
+check_capture ich 'abcXYdef'
+
+start_pane erase 10 3 'abcdef\r\033[3C\033[KZ\n'
+check_capture erase 'abcZ'
+
+start_pane el1 10 3 'abcdef\r\033[3C\033[1KZ\n'
+check_capture el1 '   Zef'
+
+start_pane ech 10 3 'abcdef\r\033[3C\033[2XX\n'
+check_capture ech 'abcX f'
+
+start_pane ed 10 3 'one\ntwo\033[2;2H\033[JX\n'
+check_capture ed 'one
+tX'
+
+start_pane ed1 10 3 'one\ntwo\033[2;2H\033[1JX\n'
+check_capture ed1 '
+ Xo'
+
+start_pane ed2 10 3 'one\ntwo\033[2JZ\n'
+check_capture ed2 '
+   Z'
+
+start_pane il 8 4 '111\n222\n333\033[2;1H\033[LAAA\n'
+check_capture il '111
+AAA
+222
+333'
+
+start_pane dl 8 4 '111\n222\n333\033[2;1H\033[MZZZ\n'
+check_capture dl '111
+ZZZ'
+
+start_pane irm 10 3 'abcdef\r\033[4h\033[3CXY\033[4lZ\n'
+check_capture irm 'abcXYZef'
+
+start_pane rep 10 3 'A\033[4bB\n'
+check_capture rep 'AAAAAB'
+
+start_pane decaln 6 3 '\033#8'
+check_capture decaln 'EEEEEE
+EEEEEE
+EEEEEE'
+
+$TMUX kill-server 2>/dev/null
+exit $exit_status
diff --git a/regress/input-malformed.sh b/regress/input-malformed.sh
new file mode 100644
index 000000000..55a7e38c0
--- /dev/null
+++ b/regress/input-malformed.sh
@@ -0,0 +1,42 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_cmd csi-param-discard 8 3 \
+    "perl -e 'print qq{\e[}, q{1} x 80, qq{\030OK}'; sleep 2"
+check_capture csi-param-discard 'OK'
+
+start_cmd csi-interm-discard 8 3 \
+    "perl -e 'print qq{\e[    \030OK}'; sleep 2"
+check_capture csi-interm-discard 'OK'
+
+start_cmd osc-discard 8 3 \
+    "perl -e 'print qq{\e]2;}, q{x} x 1100000, qq{\e\\\\OK}'; sleep 2"
+check_capture osc-discard 'OK'
+
+start_cmd apc-discard 8 3 \
+    "perl -e 'print qq{\e_}, q{x} x 1100000, qq{\e\\\\OK}'; sleep 2"
+check_capture apc-discard 'OK'
+
+start_pane unknown-csi 8 3 '\033[?9999zOK'
+check_capture unknown-csi 'OK'
+
+start_pane unknown-osc 8 3 '\033]999;bad\aOK'
+check_capture unknown-osc 'OK'
+
+start_pane malformed-osc 8 3 '\033]8;id=a:id=b;http://bad\aX\033]8;id=no-separator\aY\033]9;4;5;200\a\033]9;4;z\a\033]10;notacolour\a\033]11;notacolour\a\033]12;notacolour\a\033]4;999;red\a\033]104;999\a\033]52bad\a\033]52;c;@@@\aOK'
+check_capture malformed-osc 'XYOK'
+check_raw_matches malformed-osc \
+    'C 0,0 data=\(1,1,X\).* link=NONE linkid=NONE' \
+    'C 0,1 data=\(1,1,Y\).* link=NONE linkid=NONE' \
+    'C 0,2 data=\(1,1,O\).* link=NONE linkid=NONE' \
+    'C 0,3 data=\(1,1,K\).* link=NONE linkid=NONE'
+
+start_pane malformed-dcs 8 3 '\033P$qBAD\033\\OK'
+check_capture malformed-dcs 'OK^[P0$r
+^[\'
+
+start_pane malformed-utf8 8 3 '\360\200\200\200A\355\240\200B'
+check_capture malformed-utf8 '�A�B'
+
+exit $exit_status
diff --git a/regress/input-modes.sh b/regress/input-modes.sh
new file mode 100644
index 000000000..9bbe44429
--- /dev/null
+++ b/regress/input-modes.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane alternate 10 3 'MAIN\033[?1049hALT\033[?1049lZ\n'
+check_capture alternate 'MAINZ'
+
+start_pane osc133 10 4 '\033]133;A\007prompt\n\033]133;C\007output\n'
+check_capture osc133 'prompt
+output'
+check_flags osc133 'P prompt
+O output'
+
+$TMUX kill-server 2>/dev/null
+exit $exit_status
diff --git a/regress/input-osc.sh b/regress/input-osc.sh
new file mode 100644
index 000000000..19b9d400f
--- /dev/null
+++ b/regress/input-osc.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane hyperlink 20 3 '\033]8;id=1;https://example.com\033\\link\033]8;;\033\\ plain\n'
+check_capture hyperlink 'link plain'
+check_flags hyperlink 'HX link plain'
+$TMUX capture-pane -peH -t hyperlink: -S 0 -E - >/dev/null || exit 1
+
+start_pane palette 20 3 '\033]4;1;rgb:11/22/33;2;red\007\033]104;1;2\007X\n'
+check_capture palette 'X'
+
+start_pane osc-colours 20 3 '\033]10;rgb:11/22/33\007\033]11;rgb:44/55/66\007\033]12;rgb:77/88/99\007\033]110\007\033]111\007\033]112\007X\n'
+check_capture osc-colours 'X'
+
+start_pane progress 20 3 '\033]9;4;1;25\007\033]9;4;0\007\033]9;4;5;200\007X\n'
+check_capture progress 'X'
+
+start_pane rename 20 3 '\033krenamed\033\\X\n'
+check_capture rename 'X'
+
+start_pane apc-title 20 3 '\033_test-title\033\\X\n'
+check_capture apc-title 'X'
+
+$TMUX kill-server 2>/dev/null
+sleep 0.1
+$TMUX new-session -d -x 20 -y 3 -s osc52 "sleep 2" || exit 1
+$TMUX set-option -s set-clipboard on || exit 1
+$TMUX respawn-pane -k -t osc52: \
+    "printf '\033]52;c;SGVsbG8=\007'; sleep 2" || exit 1
+sleep 0.3
+$TMUX save-buffer -b buffer0 - >"$TMP"
+printf "Hello" >"$EXP"
+cmp "$TMP" "$EXP" || fail "osc52"
+
+$TMUX kill-server 2>/dev/null
+exit $exit_status
diff --git a/regress/input-raw-controls.sh b/regress/input-raw-controls.sh
new file mode 100644
index 000000000..ef67fe39c
--- /dev/null
+++ b/regress/input-raw-controls.sh
@@ -0,0 +1,84 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane bs 8 3 'abc\bd'
+check_capture bs 'abd'
+check_raw_matches bs \
+	'C 0,0 data=\(1,1,a\) flags=NONE\[0\]' \
+	'C 0,1 data=\(1,1,b\) flags=NONE\[0\]' \
+	'C 0,2 data=\(1,1,d\) flags=NONE\[0\]'
+
+start_pane nel 8 3 'A\033EB'
+check_capture nel 'A
+B'
+check_raw_matches nel \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 1,0 data=\(1,1,B\) flags=NONE\[0\]'
+
+start_pane tabstops 16 3 '\033H1\t2\033[3g\r\t3'
+check_raw_matches tabstops \
+	'C 0,0 data=\(1,1,1\) flags=NONE\[0\]' \
+	'C 0,8 data=\(1,1,2\) flags=NONE\[0\]' \
+	'C 0,15 data=\(1,1,3\) flags=NONE\[0\]'
+
+start_pane decaln 6 3 '\033#8'
+check_raw_matches decaln \
+	'C 0,0 data=\(1,1,E\) flags=NONE\[0\]' \
+	'C 1,5 data=\(1,1,E\) flags=NONE\[0\]' \
+	'C 2,5 data=\(1,1,E\) flags=NONE\[0\]'
+
+start_pane charset 8 3 '\033(0qxl\033(BZ'
+check_raw_matches charset \
+	'C 0,0 data=\(1,1,q\) flags=NONE\[0\] attr=CHARSET\[[0-9a-f]+\]' \
+	'C 0,1 data=\(1,1,x\) flags=NONE\[0\] attr=CHARSET\[[0-9a-f]+\]' \
+	'C 0,2 data=\(1,1,l\) flags=NONE\[0\] attr=CHARSET\[[0-9a-f]+\]' \
+	'C 0,3 data=\(1,1,Z\) flags=NONE\[0\] attr=NONE\[0\]'
+
+start_pane g1charset 8 3 '\033)0\016q\017Z'
+check_raw_matches g1charset \
+	'C 0,0 data=\(1,1,q\) flags=NONE\[0\] attr=CHARSET\[[0-9a-f]+\]' \
+	'C 0,1 data=\(1,1,Z\) flags=NONE\[0\] attr=NONE\[0\]'
+
+start_pane csisave 8 3 '\033[3;3HS\033[s\033[1;1HA\033[uR'
+check_raw_matches csisave \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 2,2 data=\(1,1,S\) flags=NONE\[0\]' \
+	'C 2,3 data=\(1,1,R\) flags=NONE\[0\]'
+
+start_pane alternate 8 3 'main\033[?1049halt\033[?1049lback'
+check_capture alternate 'mainback'
+check_raw_matches alternate \
+	'C 0,0 data=\(1,1,m\) flags=NONE\[0\]' \
+	'C 0,4 data=\(1,1,b\) flags=NONE\[0\]' \
+	'C 0,7 data=\(1,1,k\) flags=NONE\[0\]'
+
+start_pane sync 8 3 '\033P=1signored\033\\A\033P=2s\033\\B'
+check_raw_matches sync \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 0,1 data=\(1,1,B\) flags=NONE\[0\]'
+
+start_pane private 8 3 '\033[?25lA\033[?25hB\033[?1000hC\033[?1000lD'
+check_raw_matches private \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 0,1 data=\(1,1,B\) flags=NONE\[0\]' \
+	'C 0,2 data=\(1,1,C\) flags=NONE\[0\]' \
+	'C 0,3 data=\(1,1,D\) flags=NONE\[0\]'
+
+start_pane ris 8 3 'A\033cB'
+check_capture ris 'B'
+check_raw_matches ris \
+	'C 0,0 data=\(1,1,B\) flags=NONE\[0\]' \
+	'C 0,1 data=\(1,1, \) flags=CLEARED\[[0-9a-f]+\]'
+
+start_pane keypad 8 3 '\033=A\033>B'
+check_raw_matches keypad \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 0,1 data=\(1,1,B\) flags=NONE\[0\]'
+
+start_pane cursorstyle 8 3 '\033[5 qA\033[0 qB'
+check_raw_matches cursorstyle \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 0,1 data=\(1,1,B\) flags=NONE\[0\]'
+
+exit $exit_status
diff --git a/regress/input-raw-cursor.sh b/regress/input-raw-cursor.sh
new file mode 100644
index 000000000..4cba03eed
--- /dev/null
+++ b/regress/input-raw-cursor.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane absolute 8 4 'A\033[3;5HB\033[2GC\033[2D!'
+check_capture absolute 'A
+
+!C  B'
+check_cursor absolute '1,2'
+check_raw_matches absolute \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 2,4 data=\(1,1,B\) flags=NONE\[0\]' \
+	'C 2,0 data=\(1,1,!\) flags=NONE\[0\]' \
+	'C 2,1 data=\(1,1,C\) flags=NONE\[0\]'
+
+start_pane savecursor 8 4 '\033[4;4HS\0337\033[1;1HA\0338R'
+check_capture savecursor 'A
+
+
+   SR'
+check_cursor savecursor '5,3'
+check_raw_matches savecursor \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 3,3 data=\(1,1,S\) flags=NONE\[0\]' \
+	'C 3,4 data=\(1,1,R\) flags=NONE\[0\]'
+
+start_pane origin 8 5 '\033[2;4r\033[?6h\033[1;1HO\033[3;1HP\033[?6lQ'
+check_raw_matches origin \
+	'C 1,0 data=\(1,1,O\) flags=NONE\[0\]' \
+	'C 3,0 data=\(1,1,P\) flags=NONE\[0\]' \
+	'C 0,0 data=\(1,1,Q\) flags=NONE\[0\]'
+
+exit $exit_status
diff --git a/regress/input-raw-edit.sh b/regress/input-raw-edit.sh
new file mode 100644
index 000000000..6d78cc3c4
--- /dev/null
+++ b/regress/input-raw-edit.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane erasechars 8 3 'ABCDEFGH\r\033[3C\033[2X'
+check_capture erasechars 'ABC  FGH'
+check_raw_matches erasechars \
+	'C 0,3 data=\(1,1, \) flags=CLEARED\[[0-9a-f]+\] attr=NONE\[0\]' \
+	'C 0,4 data=\(1,1, \) flags=CLEARED\[[0-9a-f]+\] attr=NONE\[0\]' \
+	'C 0,5 data=\(1,1,F\) flags=NONE\[0\]'
+
+start_pane deletechars 8 3 'ABCDEFGH\r\033[3C\033[3P'
+check_capture deletechars 'ABCGH'
+check_raw_matches deletechars \
+	'C 0,3 data=\(1,1,G\) flags=NONE\[0\]' \
+	'C 0,4 data=\(1,1,H\) flags=NONE\[0\]' \
+	'C 0,5 data=\(1,1, \) flags=CLEARED\[[0-9a-f]+\] attr=NONE\[0\]'
+
+start_pane insertchars 8 3 'ABCDEF\r\033[3C\033[2@xy'
+check_capture insertchars 'ABCxyDEF'
+check_raw_matches insertchars \
+	'C 0,3 data=\(1,1,x\) flags=NONE\[0\]' \
+	'C 0,4 data=\(1,1,y\) flags=NONE\[0\]' \
+	'C 0,5 data=\(1,1,D\) flags=NONE\[0\]'
+
+start_pane eraseline 8 3 'ABCDEFGH\r\033[4C\033[K'
+check_capture eraseline 'ABCD'
+check_raw_matches eraseline \
+	'C 0,4 data=\(1,1, \) flags=CLEARED\[[0-9a-f]+\] attr=NONE\[0\]' \
+	'C 0,7 data=\(1,1, \) flags=CLEARED\[[0-9a-f]+\] attr=NONE\[0\]'
+
+start_pane erasescreen 8 3 '1111111\033[2;1H2222222\033[H\033[JZ'
+check_capture erasescreen 'Z'
+check_raw_matches erasescreen \
+	'^G 8x3 \(0/0\)$' \
+	'C [0-9]+,0 data=\(1,1,Z\) flags=NONE\[0\]' \
+	'C [0-9]+,1 data=\(1,1, \) flags=CLEARED\[[0-9a-f]+\] attr=NONE\[0\]'
+
+start_pane tabs 12 3 'A\tB\033[2g\r\033[IC'
+check_raw_matches tabs \
+	'L 0 \(0\) flags=EXTENDED\[[0-9a-f]+\]' \
+	'C 0,1 data=\(7,7,       \) flags=TAB\[[0-9a-f]+\]' \
+	'C 0,2 data=\(1,1,!\) flags=PADDING\[[0-9a-f]+\]' \
+	'C 0,8 data=\(1,1,B\) flags=NONE\[0\]' \
+	'C 0,0 data=\(1,1,C\) flags=NONE\[0\]'
+
+exit $exit_status
diff --git a/regress/input-raw-history.sh b/regress/input-raw-history.sh
new file mode 100644
index 000000000..d3c7d260c
--- /dev/null
+++ b/regress/input-raw-history.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane_hlimit trim 6 3 'one\ntwo\nthree\nfour\nfive\nsix' 2
+check_raw_matches trim \
+	'^G 6x3 \(2/2\)$' \
+	'L 0 \(-\) flags=NONE\[0\]' \
+	'L 1 \(-\) flags=NONE\[0\]'
+
+$TMUX clear-history -t trim:
+check_raw_matches trim \
+	'^G 6x3 \(0/2\)$' \
+	'C 0,0 data=\(1,1,f\) flags=NONE\[0\]' \
+	'C 2,0 data=\(1,1,s\) flags=NONE\[0\]'
+
+start_pane_hlimit edhistory 6 3 'one\ntwo\nthree\033[H\033[JZ' 5
+check_raw_matches edhistory \
+	'^G 6x3 \([1-9][0-9]*/5\)$' \
+	'L [0-9]+ \(-\) flags=NONE\[0\]' \
+	'C [0-9]+,0 data=\(1,1,Z\) flags=NONE\[0\]'
+
+exit $exit_status
diff --git a/regress/input-raw-reflow.sh b/regress/input-raw-reflow.sh
new file mode 100644
index 000000000..2e1d6c188
--- /dev/null
+++ b/regress/input-raw-reflow.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane_history reflow 8 4 'abcdefgh\nijklmnop\nqrstuvwx\nyz'
+$TMUX resize-window -t reflow: -x 4 -y 4
+sleep 0.2
+check_raw_matches reflow \
+	'^G 4x4 \([0-9]+/2000\)$' \
+	'L [0-9]+ \([0-9-]+\) flags=WRAPPED\[[0-9a-f]+\]' \
+	'C [0-9]+,0 data=\(1,1,a\) flags=NONE\[0\]' \
+	'C [0-9]+,3 data=\(1,1,d\) flags=NONE\[0\]'
+
+$TMUX resize-window -t reflow: -x 12 -y 4
+sleep 0.2
+check_raw_matches reflow \
+	'^G 12x4 \([0-9]+/2000\)$' \
+	'C [0-9]+,0 data=\(1,1,a\) flags=NONE\[0\]' \
+	'C [0-9]+,7 data=\(1,1,h\) flags=NONE\[0\]'
+
+exit $exit_status
diff --git a/regress/input-raw-scroll.sh b/regress/input-raw-scroll.sh
new file mode 100644
index 000000000..8fb2a6f50
--- /dev/null
+++ b/regress/input-raw-scroll.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane_history history 6 3 'one\ntwo\nthree\nfour\nfive'
+check_raw_matches history \
+	'^G 6x3 \([1-9][0-9]*/2000\)$' \
+	'L [0-9]+ \(-\) flags=NONE\[0\]' \
+	'C [0-9]+,0 data=\(1,1,o\) flags=NONE\[0\]'
+
+start_pane_history index 6 4 'A\nB\nC\033[2;3r\033[2;1HX\033D\033DY'
+check_raw_matches index \
+	'C [0-9]+,0 data=\(1,1,X\) flags=NONE\[0\]' \
+	'C [0-9]+,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C [0-9]+,1 data=\(1,1,Y\) flags=NONE\[0\]'
+
+start_pane reverse 6 4 'A\nB\nC\033[2;3r\033[2;1H\033MY'
+check_raw_matches reverse \
+	'C 1,0 data=\(1,1,Y\) flags=NONE\[0\]' \
+	'C 2,0 data=\(1,1,B\) flags=NONE\[0\]'
+
+start_pane insertline 6 4 'A\nB\nC\033[2;3r\033[2;1H\033[LY'
+check_raw_matches insertline \
+	'C 1,0 data=\(1,1,Y\) flags=NONE\[0\]' \
+	'C 2,0 data=\(1,1,B\) flags=NONE\[0\]'
+
+start_pane deleteline 6 4 'A\nB\nC\033[2;3r\033[2;1H\033[MY'
+check_raw_matches deleteline \
+	'C 1,0 data=\(1,1,Y\) flags=NONE\[0\]' \
+	'C 2,0 data=\(1,1, \) flags=NONE\[0\]'
+
+start_pane region-edge 6 4 'top\033[2;3rmid\033[2;1H\033D\033Mbot'
+check_raw_matches region-edge \
+	'C 0,0 data=\(1,1,m\) flags=NONE\[0\]' \
+	'C 1,0 data=\(1,1,b\) flags=NONE\[0\]' \
+	'C 2,0 data=\(1,1, \) flags=NONE\[0\]' \
+	'C 3,0 data=\(1,1, \) flags=NONE\[0\]'
+
+exit $exit_status
diff --git a/regress/input-raw-sgr.sh b/regress/input-raw-sgr.sh
new file mode 100644
index 000000000..c9a0b5fba
--- /dev/null
+++ b/regress/input-raw-sgr.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane attrs 16 3 '\033[1mB\033[2mD\033[3mI\033[4mU\033[5mK\033[7mR\033[8mH\033[9mS\033[53mO'
+check_raw_matches attrs \
+	'C 0,0 data=\(1,1,B\) flags=NONE\[0\] attr=BRIGHT\[[0-9a-f]+\]' \
+	'C 0,1 data=\(1,1,D\) flags=NONE\[0\] attr=BRIGHT,DIM\[[0-9a-f]+\]' \
+	'C 0,2 data=\(1,1,I\) flags=NONE\[0\] attr=BRIGHT,DIM,ITALICS\[[0-9a-f]+\]' \
+	'C 0,3 data=\(1,1,U\) flags=NONE\[0\] attr=BRIGHT,DIM,UNDERSCORE,ITALICS\[[0-9a-f]+\]' \
+	'C 0,5 data=\(1,1,R\) flags=NONE\[0\] attr=BRIGHT,DIM,UNDERSCORE,BLINK,REVERSE,ITALICS\[[0-9a-f]+\]' \
+	'C 0,7 data=\(1,1,S\) flags=NONE\[0\] attr=BRIGHT,DIM,UNDERSCORE,BLINK,REVERSE,HIDDEN,ITALICS,STRIKETHROUGH\[[0-9a-f]+\]' \
+	'C 0,8 data=\(1,1,O\) flags=NONE\[0\] attr=BRIGHT,DIM,UNDERSCORE,BLINK,REVERSE,HIDDEN,ITALICS,STRIKETHROUGH,OVERLINE\[[0-9a-f]+\]'
+
+start_pane colours 12 3 '\033[38;5;196;48;5;17mX\033[58;5;45mY'
+check_raw_matches colours \
+	'C 0,0 data=\(1,1,X\) flags=FG256,BG256\[[0-9a-f]+\] attr=NONE\[0\] fg=colour196\[10000c4\] bg=colour17\[1000011\]' \
+	'C 0,1 data=\(1,1,Y\) flags=FG256,BG256\[[0-9a-f]+\] attr=NONE\[0\] fg=colour196\[10000c4\] bg=colour17\[1000011\] us=colour45\[100002d\]'
+
+start_pane bce 8 3 '\033[44mA\033[K'
+check_raw_matches bce \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\] attr=NONE\[0\].* bg=blue\[4\]' \
+	'C 0,1 data=\(1,1, \) flags=CLEARED\[[0-9a-f]+\] attr=NONE\[0\].* bg=blue\[4\]' \
+	'C 0,7 data=\(1,1, \) flags=CLEARED\[[0-9a-f]+\] attr=NONE\[0\].* bg=blue\[4\]'
+
+start_pane underlines 12 3 '\033[4:2m2\033[4:3m3\033[4:4m4\033[4:5m5'
+check_raw_matches underlines \
+	'C 0,0 data=\(1,1,2\) flags=NONE\[0\] attr=UNDERSCORE_2\[[0-9a-f]+\]' \
+	'C 0,1 data=\(1,1,3\) flags=NONE\[0\] attr=UNDERSCORE_3\[[0-9a-f]+\]' \
+	'C 0,2 data=\(1,1,4\) flags=NONE\[0\] attr=UNDERSCORE_4\[[0-9a-f]+\]' \
+	'C 0,3 data=\(1,1,5\) flags=NONE\[0\] attr=UNDERSCORE_5\[[0-9a-f]+\]'
+
+start_pane hyperlink 12 3 '\033]8;id=id1;https://example.com/a\033\\A\033]8;;\033\\B'
+check_raw_matches hyperlink \
+	'L 0 \(0\) flags=EXTENDED,HYPERLINK\[[0-9a-f]+\]' \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\].* link=https://example.com/a linkid=id1' \
+	'C 0,1 data=\(1,1,B\) flags=NONE\[0\].* link=NONE linkid=NONE'
+
+exit $exit_status
diff --git a/regress/input-raw-unicode.sh b/regress/input-raw-unicode.sh
new file mode 100644
index 000000000..76e2f5512
--- /dev/null
+++ b/regress/input-raw-unicode.sh
@@ -0,0 +1,82 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane wide 8 3 'A\343\201\202B'
+check_capture wide 'AあB'
+check_raw_matches wide \
+	'L 0 \(0\) flags=EXTENDED\[[0-9a-f]+\]' \
+	'C 0,1 data=\(2,3,あ\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 0,2 data=\(1,1,!\) flags=PADDING\[[0-9a-f]+\] attr=NONE\[0\]' \
+	'C 0,3 data=\(1,1,B\) flags=NONE\[0\]'
+
+start_pane combining 8 3 'e\314\201x'
+check_raw_matches combining \
+	'L 0 \(0\) flags=EXTENDED\[[0-9a-f]+\]' \
+	'C 0,0 data=\(1,[0-9]+,.*\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 0,1 data=\(1,1,x\) flags=NONE\[0\]'
+
+start_pane emoji 10 3 '\360\237\230\200Z'
+check_raw_matches emoji \
+	'L 0 \(0\) flags=EXTENDED\[[0-9a-f]+\]' \
+	'C 0,0 data=\(2,4,😀\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 0,1 data=\(1,1,!\) flags=PADDING\[[0-9a-f]+\] attr=NONE\[0\]' \
+	'C 0,2 data=\(1,1,Z\) flags=NONE\[0\]'
+
+start_pane flag 10 3 '\360\237\207\254\360\237\207\247!'
+check_raw_matches flag \
+	'L 0 \(0\) flags=EXTENDED\[[0-9a-f]+\]' \
+	'C 0,0 data=\(2,8,🇬🇧\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 0,1 data=\(1,1,!\) flags=PADDING\[[0-9a-f]+\] attr=NONE\[0\]' \
+	'C 0,2 data=\(1,1,!\) flags=NONE\[0\]'
+
+start_pane variation 10 3 '*\357\270\217!'
+check_raw_matches variation \
+	'L 0 \(0\) flags=EXTENDED\[[0-9a-f]+\]' \
+	'C 0,0 data=\(2,[0-9]+,.*\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 0,1 data=\(1,1,!\) flags=PADDING\[[0-9a-f]+\] attr=NONE\[0\]' \
+	'C 0,2 data=\(1,1,!\) flags=NONE\[0\]'
+
+start_pane invalid 10 3 '\377A'
+check_raw_matches invalid \
+	'C 0,0 data=\(1,3,.*\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 0,1 data=\(1,1,A\) flags=NONE\[0\]'
+
+start_pane trunc2 10 3 '\303A'
+check_raw_matches trunc2 \
+	'C 0,0 data=\(1,3,.*\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 0,1 data=\(1,1,A\) flags=NONE\[0\]'
+
+start_pane trunc3 10 3 '\342\202A'
+check_raw_matches trunc3 \
+	'C 0,0 data=\(1,3,.*\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 0,1 data=\(1,1,A\) flags=NONE\[0\]'
+
+start_pane overwrite-wide-left 10 3 'A\343\201\202B\r\033[1CX'
+check_raw_matches overwrite-wide-left \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 0,1 data=\(1,1,X\) flags=NONE\[0\]' \
+	'C 0,2 data=\(1,1, \) flags=NONE\[0\]' \
+	'C 0,3 data=\(1,1,B\) flags=NONE\[0\]'
+
+start_pane overwrite-wide-pad 10 3 'A\343\201\202B\r\033[2CX'
+check_raw_matches overwrite-wide-pad \
+	'C 0,0 data=\(1,1,A\) flags=NONE\[0\]' \
+	'C 0,1 data=\(1,1, \) flags=NONE\[0\]' \
+	'C 0,2 data=\(1,1,X\) flags=NONE\[0\]' \
+	'C 0,3 data=\(1,1,B\) flags=NONE\[0\]'
+
+start_pane overwrite-wide-with-wide 10 3 'A\343\201\202B\r\033[1C\347\225\214'
+check_raw_matches overwrite-wide-with-wide \
+	'C 0,1 data=\(2,3,界\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 0,2 data=\(1,1,!\) flags=PADDING\[[0-9a-f]+\] attr=NONE\[0\]' \
+	'C 0,3 data=\(1,1,B\) flags=NONE\[0\]'
+
+start_pane wide-right-edge 4 3 'ABC\343\201\202Z'
+check_raw_matches wide-right-edge \
+	'L 0 \(0\) flags=WRAPPED\[[0-9a-f]+\]' \
+	'C 1,0 data=\(2,3,あ\) flags=NONE\[0\] attr=NONE\[0\]' \
+	'C 1,1 data=\(1,1,!\) flags=PADDING\[[0-9a-f]+\] attr=NONE\[0\]' \
+	'C 1,2 data=\(1,1,Z\) flags=NONE\[0\]'
+
+exit $exit_status
diff --git a/regress/input-raw-wrap.sh b/regress/input-raw-wrap.sh
new file mode 100644
index 000000000..7ae2634d6
--- /dev/null
+++ b/regress/input-raw-wrap.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane wrap 5 3 'ABCDEZ'
+check_capture wrap 'ABCDE
+Z'
+check_raw_matches wrap \
+	'^G 5x3 \(0/0\)$' \
+	'L 0 \(0\) flags=WRAPPED\[[0-9a-f]+\]' \
+	'C 0,4 data=\(1,1,E\) flags=NONE\[0\]' \
+	'C 1,0 data=\(1,1,Z\) flags=NONE\[0\]'
+
+start_pane nowrap 5 3 '\033[?7lABCDEZ'
+check_capture nowrap 'ABCDZ'
+check_raw_matches nowrap \
+	'^G 5x3 \(0/0\)$' \
+	'L 0 \(0\) flags=NONE\[0\]' \
+	'C 0,4 data=\(1,1,Z\) flags=NONE\[0\]'
+
+start_pane pending 5 3 'ABCD\r\033[4CZ'
+check_capture pending 'ABCDZ'
+check_cursor pending '5,0'
+check_raw_matches pending \
+	'L 0 \(0\) flags=NONE\[0\]' \
+	'C 0,4 data=\(1,1,Z\) flags=NONE\[0\]'
+
+exit $exit_status
diff --git a/regress/input-replies.sh b/regress/input-replies.sh
new file mode 100644
index 000000000..9baed827d
--- /dev/null
+++ b/regress/input-replies.sh
@@ -0,0 +1,94 @@
+#!/bin/sh
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -Ltest -f/dev/null"
+
+$TMUX kill-server 2>/dev/null
+sleep 0.1
+
+TMP=$(mktemp)
+EXP=$(mktemp)
+trap 'rm -f "$TMP" "$EXP"; $TMUX kill-server 2>/dev/null' 0 1 15
+
+$TMUX new-session -d -x 80 -y 24 -s replies \; \
+    set-window-option -t replies:0 remain-on-exit on || exit 1
+$TMUX set-option -s set-clipboard on || exit 1
+$TMUX set-option -s get-clipboard buffer || exit 1
+printf Hello | $TMUX load-buffer -
+sleep 0.3
+
+exit_status=0
+
+fail()
+{
+	echo "FAIL: $1"
+	diff -u "$EXP" "$TMP"
+	exit_status=1
+}
+
+query()
+{
+	name=$1
+	expected=$2
+	seq=$3
+	count=$4
+	setup=$5
+
+	$TMUX respawn-window -k -t replies:0 \
+	    "stty raw -echo min 1 time 20; printf '$setup'; printf '$seq'; dd bs=1 count=$count 2>/dev/null | cat -v >$TMP"
+	sleep 0.5
+	printf "%s" "$expected" >"$EXP"
+	cmp "$TMP" "$EXP" || fail "$name"
+}
+
+query_timeout()
+{
+	name=$1
+	expected=$2
+	seq=$3
+	setup=$4
+
+	$TMUX respawn-window -k -t replies:0 \
+	    "stty raw -echo min 0 time 5; printf '$setup'; printf '$seq'; sleep 0.1; dd bs=1 count=128 2>/dev/null | cat -v >$TMP"
+	sleep 0.7
+	printf "%s" "$expected" >"$EXP"
+	cmp "$TMP" "$EXP" || fail "$name"
+}
+
+query "dsr-ok" '^[[0n' '\033[5n' 4 ''
+query "dsr-cursor" '^[[1;1R' '\033[6n' 6 ''
+query "da-primary" '^[[?1;2c' '\033[c' 7 ''
+query "da-secondary" '^[[>84;0;0c' '\033[>c' 10 ''
+query "decrqm-irm-reset" '^[[4;2$y' '\033[4$p' 8 ''
+query "decrqm-irm-set" '^[[4;1$y' '\033[4$p' 8 '\033[4h'
+query "decrqm-cursor-keys-reset" '^[[?1;2$y' '\033[?1$p' 9 ''
+query "decrqm-cursor-keys-set" '^[[?1;1$y' '\033[?1$p' 9 '\033[?1h'
+query "decrqm-columns" '^[[?3;4$y' '\033[?3$p' 9 ''
+query "decrqm-origin-reset" '^[[?6;2$y' '\033[?6$p' 9 ''
+query "decrqm-origin-set" '^[[?6;1$y' '\033[?6$p' 9 '\033[?6h'
+query "decrqm-wrap-set" '^[[?7;1$y' '\033[?7$p' 9 ''
+query "decrqm-wrap-reset" '^[[?7;2$y' '\033[?7$p' 9 '\033[?7l'
+query "decrqm-cursor-visible-set" '^[[?25;1$y' '\033[?25$p' 10 ''
+query "decrqm-cursor-visible-reset" '^[[?25;2$y' '\033[?25$p' 10 '\033[?25l'
+query "decrqm-mouse-standard-set" '^[[?1000;1$y' '\033[?1000$p' 12 '\033[?1000h'
+query "decrqm-mouse-button-set" '^[[?1002;1$y' '\033[?1002$p' 12 '\033[?1002h'
+query "decrqm-mouse-all-set" '^[[?1003;1$y' '\033[?1003$p' 12 '\033[?1003h'
+query "decrqm-focus-set" '^[[?1004;1$y' '\033[?1004$p' 12 '\033[?1004h'
+query "decrqm-mouse-utf8-set" '^[[?1005;1$y' '\033[?1005$p' 12 '\033[?1005h'
+query "decrqm-mouse-sgr-set" '^[[?1006;1$y' '\033[?1006$p' 12 '\033[?1006h'
+query "decrqm-bracket-paste-set" '^[[?2004;1$y' '\033[?2004$p' 12 '\033[?2004h'
+query "decrqm-theme-updates-set" '^[[?2031;1$y' '\033[?2031$p' 12 '\033[?2031h'
+query "decrqss-cursor-style" '^[P1$r q0 q' '\033P$q q\033\\' 10 ''
+
+query_timeout "osc-10-query" '^[]10;rgb:ffff/0000/0000^G' '\033]10;?\007' '\033]10;red\007'
+query_timeout "osc-11-query" '^[]11;rgb:0000/0000/ffff^G' '\033]11;?\007' '\033]11;blue\007'
+query_timeout "osc-12-query" '^[]12;rgb:0000/ffff/0000^G' '\033]12;?\007' '\033]12;green\007'
+query_timeout "osc-4-query" '^[]4;1;rgb:ffff/0000/0000^G' '\033]4;1;?\007' '\033]4;1;red\007'
+query_timeout "osc-104-reset-query" '' '\033]4;1;?\007' '\033]4;1;red\007\033]104;1\007'
+query_timeout "osc-52-query" '^[]52;c;SGVsbG8=^G' '\033]52;c;?\007' ''
+
+$TMUX kill-server 2>/dev/null
+exit $exit_status
diff --git a/regress/input-requests.sh b/regress/input-requests.sh
new file mode 100644
index 000000000..d9186c673
--- /dev/null
+++ b/regress/input-requests.sh
@@ -0,0 +1,117 @@
+#!/bin/sh
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+
+python3 - "$TEST_TMUX" <<'PY'
+import os
+import select
+import signal
+import subprocess
+import sys
+import tempfile
+import time
+
+tmux = sys.argv[1]
+server = [tmux, "-Ltest", "-f/dev/null"]
+
+def run(*args, check=True):
+    return subprocess.run(server + list(args), check=check,
+        stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+def attach():
+    pid, fd = os.forkpty()
+    if pid == 0:
+        os.environ["TERM"] = "xterm-256color"
+        os.execl(tmux, tmux, "-Ltest", "-f/dev/null", "attach-session",
+            "-t", "requests")
+    os.set_blocking(fd, False)
+    return pid, fd
+
+def read_until(fd, needle, timeout=5):
+    end = time.time() + timeout
+    data = b""
+    while time.time() < end:
+        r, _, _ = select.select([fd], [], [], 0.05)
+        if fd in r:
+            try:
+                chunk = os.read(fd, 4096)
+            except BlockingIOError:
+                chunk = b""
+            if chunk == b"":
+                continue
+            data += chunk
+            if needle in data:
+                return data
+    raise RuntimeError("did not see terminal request %r in %r" %
+        (needle, data))
+
+def wait_file(path, timeout=5):
+    end = time.time() + timeout
+    while time.time() < end:
+        try:
+            with open(path, "rb") as f:
+                data = f.read()
+            if data:
+                return data
+        except FileNotFoundError:
+            pass
+        time.sleep(0.05)
+    return b""
+
+def respawn(command):
+    run("respawn-window", "-k", "-t", "requests:0", command)
+    time.sleep(0.2)
+
+def cleanup(pid=None):
+    if pid is not None:
+        try:
+            os.kill(pid, signal.SIGHUP)
+        except ProcessLookupError:
+            pass
+    run("kill-server", check=False)
+
+run("kill-server", check=False)
+run("new-session", "-d", "-x", "80", "-y", "24", "-s", "requests",
+    "sleep 60")
+
+pid, fd = attach()
+try:
+    time.sleep(0.5)
+
+    with tempfile.NamedTemporaryFile(delete=False) as f:
+        palette_out = f.name
+    respawn("stty raw -echo min 1 time 50; "
+        "printf '\\033]4;99;?\\033\\\\'; "
+        "dd bs=1 count=64 2>/dev/null | cat -v >%s; sleep 1" %
+        palette_out)
+    read_until(fd, b"\033]4;99;?\033\\")
+    os.write(fd, b"\033]4;99;rgb:0101/0202/0303\033\\")
+    got = wait_file(palette_out)
+    expected = b"^[]4;99;rgb:0101/0202/0303^[\\"
+    if got != expected:
+        raise AssertionError("palette reply: expected %r got %r" %
+            (expected, got))
+
+    run("set-option", "-s", "set-clipboard", "on")
+    run("set-option", "-s", "get-clipboard", "request")
+    with tempfile.NamedTemporaryFile(delete=False) as f:
+        clip_out = f.name
+    respawn("stty raw -echo min 1 time 50; "
+        "printf '\\033]52;c;?\\033\\\\'; "
+        "dd bs=1 count=64 2>/dev/null | cat -v >%s; sleep 1" %
+        clip_out)
+    data = read_until(fd, b"]52;")
+    if b"?" not in data:
+        raise RuntimeError("clipboard request missing query in %r" % data)
+    os.write(fd, b"\033]52;c;UmVxdWVzdA==\033\\")
+    got = wait_file(clip_out)
+    expected = b"^[]52;c;UmVxdWVzdA==^[\\"
+    if got != expected:
+        raise AssertionError("clipboard reply: expected %r got %r" %
+            (expected, got))
+finally:
+    cleanup(pid)
+PY
diff --git a/regress/input-scroll.sh b/regress/input-scroll.sh
new file mode 100644
index 000000000..6ae48e96d
--- /dev/null
+++ b/regress/input-scroll.sh
@@ -0,0 +1,73 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane wrap 5 3 'abcdeF'
+check_capture wrap 'abcde
+F'
+check_cursor wrap '1,1'
+check_flags wrap 'W abcde
+- F'
+check_joined wrap 'abcdeF'
+
+start_pane wraplast 5 3 'abcd\033[5GZQ'
+check_capture wraplast 'abcdZ
+Q'
+check_cursor wraplast '1,1'
+
+start_pane nowrap 5 3 '\033[?7labcdeF'
+check_capture nowrap 'abcdF'
+check_cursor nowrap '4,0'
+
+start_pane origin 6 4 '111111\n222222\n333333\n444444\033[2;3r\033[?6h\033[1;1HAA\033[?6l\033[r'
+check_capture origin '111111
+AA2222
+333333
+444444'
+
+start_pane scrollup 5 4 '11111\n22222\n33333\n44444\033[2;3r\033[3;1HAAAAA\nBBBBB\033[r'
+check_capture scrollup '11111
+AAAAA
+BBBBB
+44444'
+
+start_pane scrolldown 5 4 '11111\n22222\n33333\n44444\033[2;3r\033[2;1H\033[TZZZZZ\033[r'
+check_capture scrolldown '11111
+ZZZZZ
+22222
+44444'
+
+start_pane ri 5 4 '11111\n22222\n33333\n44444\033[2;3r\033[2;1H\033MZZZZZ\033[r'
+check_capture ri '11111
+ZZZZZ
+22222
+44444'
+
+start_pane nel 5 3 'AA\033EBC\n'
+check_capture nel 'AA
+BC'
+
+$TMUX kill-server 2>/dev/null
+sleep 0.1
+$TMUX new-session -d -x 5 -y 3 -s history \; \
+    set-option -g history-limit 3 \; \
+    respawn-pane -k "printf '01\n02\n03\n04\n05\n06'; sleep 2" || exit 1
+sleep 0.3
+$TMUX capture-pane -pN -t history: -S - -E - | normalize_capture >"$TMP"
+printf "%s\n" '01
+02
+03
+04
+05
+06' >"$EXP"
+cmp "$TMP" "$EXP" || fail "history limit"
+
+$TMUX clear-history -t history:
+$TMUX capture-pane -pN -t history: -S - -E - | normalize_capture >"$TMP"
+printf "%s\n" '04
+05
+06' >"$EXP"
+cmp "$TMP" "$EXP" || fail "clear-history"
+
+$TMUX kill-server 2>/dev/null
+exit $exit_status
diff --git a/regress/input-sgr.sh b/regress/input-sgr.sh
new file mode 100644
index 000000000..435a0a9ab
--- /dev/null
+++ b/regress/input-sgr.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane sgr-basic 20 3 '\033[1;2;3;4;5;7;8;9mA\033[22;23;24;25;27;28;29mB\n'
+check_capture sgr-basic 'AB'
+$TMUX capture-pane -peN -t sgr-basic: -S 0 -E - >/dev/null || exit 1
+
+start_pane sgr-colour 20 3 '\033[31;42mA\033[38;5;196;48;5;22mB\033[38;2;1;2;3;48;2;4;5;6mC\033[39;49mD\n'
+check_capture sgr-colour 'ABCD'
+$TMUX capture-pane -peN -t sgr-colour: -S 0 -E - >/dev/null || exit 1
+
+start_pane sgr-underline 20 3 '\033[4:1mA\033[4:2mB\033[4:3mC\033[4:4mD\033[4:5mE\033[4:0mF\n'
+check_capture sgr-underline 'ABCDEF'
+$TMUX capture-pane -peN -t sgr-underline: -S 0 -E - >/dev/null || exit 1
+
+start_pane sgr-uscolour 20 3 '\033[58;5;45;4mA\033[58:2::10:20:30mB\033[59mC\n'
+check_capture sgr-uscolour 'ABC'
+$TMUX capture-pane -peN -t sgr-uscolour: -S 0 -E - >/dev/null || exit 1
+
+start_pane sgr-reset 20 3 '\033[90;100mA\033[0mB\033[91;101mC\033[39;49mD\n'
+check_capture sgr-reset 'ABCD'
+$TMUX capture-pane -peN -t sgr-reset: -S 0 -E - >/dev/null || exit 1
+
+$TMUX kill-server 2>/dev/null
+exit $exit_status
diff --git a/regress/input-unicode.sh b/regress/input-unicode.sh
new file mode 100644
index 000000000..ca74a82e8
--- /dev/null
+++ b/regress/input-unicode.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+
+. ./input-common.inc
+
+start_pane wide 10 3 '\343\201\202B\rX\n'
+check_capture wide 'X B'
+check_flags wide 'X X B'
+
+start_pane widepad 10 3 'A\343\201\202B\r\033[2CX\n'
+check_capture widepad 'A XB'
+check_flags widepad 'X A XB'
+
+start_pane wideedge 5 3 'abc\343\201\202Z\n'
+check_capture wideedge 'abcあ
+Z'
+check_cursor wideedge '0,2'
+check_joined wideedge 'abcあZ'
+
+start_pane wideeol 5 3 'abcd\343\201\202Z\n'
+check_capture wideeol 'abcd
+あZ'
+check_cursor wideeol '0,2'
+
+start_pane combine 10 3 'e\314\201\n'
+check_capture combine 'é'
+check_cursor combine '0,1'
+
+start_pane combinewide 10 3 '\343\201\202\314\201X\n'
+check_capture combinewide 'あ́X'
+check_cursor combinewide '0,1'
+
+start_pane variation 10 3 '\342\234\224\357\270\217X\n'
+check_capture variation '✔️X'
+check_cursor variation '0,1'
+
+start_pane flag 10 3 '\360\237\207\254\360\237\207\247X\n'
+check_capture flag '🇬🇧X'
+check_cursor flag '0,1'
+
+start_pane combining-left 10 3 '\314\201A\n'
+check_capture combining-left 'A'
+check_cursor combining-left '0,1'
+
+$TMUX kill-server 2>/dev/null
+exit $exit_status