add TERM fixup

.config/dotfiles/gitignore

@@ -52,6 +52,7 @@
 !/.config/zsh/rc/keyboard.zsh
 !/.config/zsh/rc/pager.zsh
 !/.config/zsh/rc/prompt.zsh
+!/.config/zsh/rc/terminal.zsh
 !/.config/zsh/var/.keep
 !/.gdbinit
 !/.gitconfig

.config/zsh/rc/terminal.zsh

@@ -0,0 +1,18 @@
+#!/bin/zsh
+
+function {
+    [ "${ZSHU_RUN[nested]}" = 1 ] || return
+
+    local -a a
+    local x
+    for i ( ${ZSHU_PARENTS_PID} ) ; do
+        [ -r /proc/$i/environ ] || continue
+        x=$(tr '\0' '\n' < /proc/$i/environ | sed -En '/^TERM=(.+)$/{s//\1/;p;}')
+        [ -n "$x" ] || continue
+        a+=( "$x" )
+    done
+    export ORIG_TERM="${a[-1]}"
+    echo "${TERM}" | grep -Fq "${ORIG_TERM}" && return
+
+    export TERM="${TERM}.${ORIG_TERM}"
+}