statfs-faker.in

#!/bin/sh

prefix="@prefix@"
exec_prefix="@exec_prefix@"
libdir="@libdir@"

statfs_faker_so="$libdir/statfs-faker.@SHARED_LIB_EXT@"

## ======================================================================

pdie() { echo "$0: ERROR: ${1-}" 1>&2; exit "${2-1}"; }

getopts_want_arg()
{
  if [[ $# -lt 2 ]]; then
    pdie "Option requires an argument: $1"
  fi
  if [[ -n ${3:+set} ]]; then
    if [[ $2 =~ $3 ]]; then
      : OK
    else
      pdie "Invalid value for option: $1: $2"
    fi
  fi
  if [[ -n ${4:+set} ]]; then
    if [[ $2 =~ $4 ]]; then
      pdie "Invalid value for option: $1: $2"
    fi
  fi
}

while [[ $# -gt 0 ]]; do
  opt="$1"; shift

  if [[ -z "${opt##-[!-]?*}" ]]; then
    set -- "-${opt#??}" ${1+"$@"}
    opt="${opt%${1#-}}"
  fi
  if [[ -z "${opt##--*=*}" ]]; then
    set -- "${opt#--*=}" ${1+"$@"}
    opt="${opt%%=*}"
  fi

  case "$opt" in
  -t|--type)
    getopts_want_arg "$opt" ${1+"$1"}
    STATFS_FAKER_F_TYPE="$1"; shift
    export STATFS_FAKER_F_TYPE
    ;;
  --)
    break
    ;;
  -*)
    pdie "Invalid option: $opt"
    ;;
  *)
    set -- "$opt" ${1+"$@"}
    break
    ;;
  esac
done

if [ $# -lt 1 ]; then
  echo "Usage: $0 [OPTIONS] COMMAND [ARGUMENT ...]" 1>&2
  echo
  echo "Options:"
  echo " -t, --type TYPE"
  echo "    Specify the fake type value (f_type) of filesystem"
  echo "    (See statfs(2) manual page for valid f_type values)"
  exit 1
fi

case ":$@LD_PRELOAD@:" in
*":$statfs_faker_so:"*)
  ;;
*)
  @LD_PRELOAD@="${@LD_PRELOAD@:+$@LD_PRELOAD@:}$statfs_faker_so"
  ;;
esac

if [ x"$1" = x"--sh-init" ]; then
  echo "@LD_PRELOAD@='$@LD_PRELOAD@'"
  echo "export @LD_PRELOAD@"
  if [ -n "@DYLD_FORCE_FLAT_NAMESPACE@" ]; then
    echo "@DYLD_FORCE_FLAT_NAMESPACE@=1"
    echo "export @DYLD_FORCE_FLAT_NAMESPACE@"
  fi
  exit 0
fi

export @LD_PRELOAD@
if [ -n "@DYLD_FORCE_FLAT_NAMESPACE@" ]; then
  @DYLD_FORCE_FLAT_NAMESPACE@=1
  export @DYLD_FORCE_FLAT_NAMESPACE@
fi

exec "$@"
exit $?