userfeedback/scripts/pchg_info

#!/bin/sh
# Copyright 2021 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

ECTOOL="/usr/sbin/ectool"

usage() {
  echo "Print peripheral device charger status."
  echo "syntax: pchg_info"
}

error() {
  echo "$0: ERROR: $*" >&2
}

# Print PCHG status using ectool.
# $1: Port number.
# On error, it prints error message but doesn't return error code.
print_pchg_status() {
  local port="$1"

  echo "[PCHG${port}]"
  if ! "${ECTOOL}" pchg "${port}"; then
    error "Failed to get status."
  fi
}

main() {
  local port_count
  local p=0

  if [ $# -ne 0 ]; then
    usage
    return 1
  fi

  if [ ! -x "${ECTOOL}" ]; then
    error "${ECTOOL} not found."
    return 0
  fi

  port_count=$(${ECTOOL} pchg)
  if [ "${port_count}" -eq 0 ]; then
    error "No PCHG ports found."
    return 0
  fi

  while [ "${p}" -lt "${port_count}" ]; do
    print_pchg_status "${p}"
    : $(( p += 1 ))
  done
}

main "$@"