#! @BUILD_SHEBANG@
# Copyright (C) 2023  Free Software Foundation, Inc.
#
# GRUB is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# GRUB is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GRUB.  If not, see <http://www.gnu.org/licenses/>.

set -e
grubshell=@builddir@/grub-shell

. "@builddir@/grub-core/modinfo.sh"

case "${grub_modinfo_target_cpu}-${grub_modinfo_platform}" in
    # PLATFORM: emu is different.
    *-emu)
	exit 77;;
    # PLATFORM: Flash targets.
    i386-qemu | i386-coreboot | mips-qemu_mips | mipsel-qemu_mips)
	exit 77;;
    # FIXME: Currently grub-shell uses only -kernel for loongson.
    mipsel-loongson)
	exit 77;;
    # FIXME: How do we setup serial ports in QEMU for these platforms?
    *-ieee1275)
	exit 77;;
esac

# Figure out the PCI device ID that the serial device will be on.
output=$(echo terminal_output | "${grubshell}" --qemu-opts="-device pci-serial")
PCIID=$(echo "$output" | grep -o "serial_pci,..:..\.." | cut -d, -f2)

if [ -z "$PCIID" ]; then
  echo "Failed to find QEMU serial device." >&2
  echo "${output}" >&2
  exit 99
fi

# Test serial output via an emulated PCI serial card.
output=$(echo "terminal_output; hello" | \
  "${grubshell}" --serial="pci,${PCIID}" \
    --qemu-opts="-chardev file,path=/dev/stdout,id=ser1 -device pci-serial,chardev=ser1")

v=$(echo -e "$output" | tail -n1)
if [ "$v" != "Hello World" ]; then
   exit 1
fi
