check-virt

#!/usr/bin/env bash
VERBOSE=0
IS_VIRTUAL=10
IS_NOT_VIRTUAL=0

VIRTWHAT="/usr/sbin/virt-what"

[ -x "$VIRTWHAT" ] || exit 0

usage() {
	# the -n and the trailing backslash are to avoid useless newlines
	echo -en "\
Usage: $0 [options] COMMAND
Options can be:
\t-v\tverbose (without this, there is barely any output)

COMMAND can be one of:
\tis_virtual\tcheck if freepto run on a virtual machine

Exit codes are:
0\tis not a virtual machine
10\tvirtual machine
1\tfor generic errors
2\tfor syntax errors
"
}
verbose() {
  if [ "$VERBOSE" -eq 1 ]; then
    echo $* >&2
  fi
}

is_virtual() {
  status=`bash ${VIRTWHAT}`
  if [ -z "$status" ]; then
    verbose "Freepto is not running on a virtual machine"
    return ${IS_NOT_VIRTUAL}
  fi
  echo "$status"
  return ${IS_VIRTUAL}
}


while getopts v opt; do
  case $opt in
    v)
      VERBOSE=1
      ;;
    \?)
      exit ${RET_SYNTAX_ERROR}
      ;;
  esac
done
shift $((OPTIND - 1))

cmd=$1
shift
case "$cmd" in
	is_virtual)
		if [ $# != 0 ]; then
			usage
			exit 1
		fi
		is_virtual
		exit $?
		;;

	*)
		echo "Command '$cmd' not found" >&2
		usage
		exit 2
		;;
esac

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