core-agent-linux/misc/qubes-run-terminal

#!/bin/sh
# Try to find a terminal emulator that's installed and run it.

is_command() {
    # bogus warning from ShellCheck < 0.5.0
    # shellcheck disable=SC2039
    type "$1" >/dev/null 2>&1
}

if is_command x-terminal-emulator; then
    exec x-terminal-emulator
fi

if is_command gnome-terminal; then
    # Check if our gnome-terminal version supports --wait
    # (we can't just run it and check exit code, because if it works, it will
    # return the exit code of the child process)
    if gnome-terminal --help-terminal-options | grep --silent -- --wait; then
        exec gnome-terminal --wait
    else
        exec gnome-terminal
    fi
fi

for terminal in xfce4-terminal konsole urxvt rxvt termit terminator Eterm aterm roxterm termite lxterminal mate-terminal terminology st xterm; do
    if is_command "$terminal" ; then
        exec "$terminal"
    fi
done

echo "ERROR: No suitable terminal found." >&2