#! /bin/sh
#
# Product setup script
#
# Go to the proper setup directory (if not already there)
cd `dirname $0`

# defaults
FATAL_ERROR="Fatal error, no tech support email configured in this setup"
# try to get root prior to running setup?
# 0: no
# 1: prompt, but run anyway if fails
# 2: require, abort if root fails
GET_ROOT=0
XSU_ICON=""
# You may want to set USE_XHOST to 1 if you want an X11 application to
# be launched with root privileges right after installation
USE_XHOST=0
# this is the message for su call, printf
SU_MESSAGE="You need to run this installation as the super user.\nPlease enter the root password."

if test -x /bin/su; then
    SU_CMD=/bin/su
else
    SU_CMD=/usr/bin/su
fi

NULL=/dev/null
# See if we have the XPG4 utilities (Solaris)
if test -d /usr/xpg4/bin; then
    PATH=/usr/xpg4/bin:$PATH
fi

# Return the appropriate architecture string
DetectARCH()
{
    status=1
    case `uname -m` in
        amd64 | x86_64)
        echo "x86_64"
        status=0;;
        i?86 | i86*)
        echo "x86"
        status=0;;
        90*/*) 
        echo "hppa"
        status=0;;
        *)
        case `uname -s` in
            IRIX*)
            echo "mips"
            status=0;;
            AIX*)
            echo "ppc"
            status=0;;
            *)
            arch=`uname -p 2> /dev/null || uname -m`
            if test "$arch" = powerpc; then
                echo "ppc"
            else
                echo $arch
            fi
            status=0;;
        esac
    esac
    return $status
}

# Return the appropriate version string
DetectLIBC()
{
    status=1
      if [ `uname -s` != Linux ]; then
          echo "glibc-2.1"
          return $status
      fi
      if [ -f `echo /lib/libc.so.6* | tail -n 1` ]; then
          if fgrep GLIBC_2.1 /lib/libc.so.6* 2> $NULL >> $NULL; then
                  echo "glibc-2.1"
                  status=0
          elif fgrep GLIBC_2.2 /lib/libc.so.6* 2> $NULL >> $NULL; then
                  echo "glibc-2.1"
                  status=0
          else
                  echo "glibc-2.0"
                  status=0
          fi
      elif [ -f /lib/libc.so.5 ]; then
          echo "libc5"
          status=0
      else
          echo "unknown"
      fi
      return $status
}

DetectOS()
{
    os=`uname -s`
    if test "$os" = "OpenUNIX"; then
        echo SCO_SV
    else
        echo $os
    fi
    return 0
}

# Detect the environment
arch=`DetectARCH`
libc=`DetectLIBC`
os=`DetectOS`

args=""

# Import preferences from a secondary script
if [ -f setup.data/config.sh ]; then
    . setup.data/config.sh
elif [ -f SETUP.DAT/CONFIG.SH\;1 ]; then
    # HP-UX and other systems unable to get LFN correctly
    . SETUP.DAT/CONFIG.SH\;1
fi

# Add some standard paths for compatibility
PATH=$PATH:/usr/ucb

# call setup with -auth when ran through su/xsu
auth=0
if [ "$1" = "-auth" ]
then
  auth=1
  shift
fi

if [ "$auth" -eq 1 ]
then
  # if root is absolutely required
  # this happens if xsu/su execs setup.sh but it still doesn't have root rights
  if [ "$GET_ROOT" -eq 2 ]
  then
    # NOTE TTimo: this causes the following error message in some cases:
    # return: can only `return' from a function or sourced script
    # BUT: in other cases, the return is legit, if you replace by an exit call, it's broken
    exit 1
  fi
fi

# Find the installation program
# try_run [-absolute] [-fatal] INSTALLER_NAME [PARAMETERS_PASSED]
#   -absolute option: if what you are trying to execute has an absolute path
#   NOTE: maybe try_run_absolute would be easier
#   -fatal option: if you want verbose messages in case
#      - the script could not be found
#      - it's execution would fail
#   INSTALLER_NAME: setup.gtk or setup
#   PARAMETERS_PASSED: additional arguments passed to the setup script
try_run()
{
    absolute=0
    if [ "$1" = "-absolute" ]; then
      absolute=1
      shift
    fi

    fatal=0
    # older bash < 2.* don't like == operator, using =
    if [ "$1" = "-fatal" ]; then
      # got fatal
      fatal=1
      shift
    fi

    setup=$1
    shift
    
    # First find the binary we want to run
    failed=0
    if [ "$absolute" -eq 0 ]
    then
      setup_bin="setup.data/bin/$os/$arch/$libc/$setup"
      # trying $setup_bin
      if [ ! -f "$setup_bin" ]; then
          setup_bin="setup.data/bin/$os/$arch/$setup"
            # libc dependant version failed, trying again
          if [ ! -f "$setup_bin" ]; then
              failed=1
          fi
      fi
      if [ "$failed" -eq 1 ]; then
          if [ "$fatal" -eq 1 ]; then
              cat <<__EOF__
This installation doesn't support $libc on $os / $arch
(tried to run $setup)
$FATAL_ERROR
__EOF__
          fi
          return $failed
      fi

      # Try to run the binary ($setup_bin)
      # The executable is here but we can't execute it from CD
      # NOTE TTimo: this is dangerous, we also use $setup to store the name of the try_run
      setup="$HOME/.setup$$"
      rm -f "$setup"
      cp "$setup_bin" "$setup"    
      chmod 700 "$setup"
      trap "rm -f $setup" 1 2 3 15
    fi
    # echo Running "$setup" "$@"
    if [ "$fatal" -eq 0 ]; then
        "$setup" "$@"
        failed="$?"
    else
        "$setup" "$@" 2>> $NULL
        failed="$?"
    fi
    if [ "$absolute" -eq 0 ]
    then
      # don't attempt removal when we are passed an absolute path
      # no, I don't want to imagine a faulty try_run as root on /bin/su
      rm -f "$setup"
    fi
    return "$failed"
}

# if we have not been through the auth yet, and if we need to get root, then prompt
if [ "$auth" -eq 0 ] && [ "$GET_ROOT" -ne 0 ]
then
  GOT_ROOT=`id -u`
  if [ "$GOT_ROOT" != "0" ]
  then
    if [ "$USE_XHOST" -eq 1 ]; then
        xhost +127.0.0.1 2> $NULL > $NULL
    fi
    try_run xsu -e -a -u root -c "sh `pwd`/setup.sh -auth" $XSU_ICON
    status="$?"
    # echo "got $status"
    # if try_run successfully executed xsu, it will return xsu's exit code
    # xsu returns 2 if ran and cancelled (i.e. the user 'doesn't want' to auth)
    # it will return 0 if the command was executed correctly
    # summing up, if we get 1, something failed
    if [ "$status" -eq 0 ]
    then
      # the auth command was properly executed
      exit 0
    elif [ "$status" -eq 1 ]
    then
      # xsu wasn't found, or failed to run
      # if xsu actually ran and the auth was cancelled, $status is 2
      # try with su
      printf "$SU_MESSAGE\n"
      try_run -absolute $SU_CMD root -c "export DISPLAY=$DISPLAY;sh `pwd`/setup.sh -auth"
      status="$?"
      if [ "$status" -eq 0 ]; then
        # the auth command was properly executed
        exit 0
      else
        exit 1
      fi
    elif [ "$status" -eq 3 ]
    then
      # the auth failed or was canceled
      # we don't want to even start the setup if not root
      echo "Please run this installation as the super user"
      exit 1
    fi
    # continue running as is
  fi
fi

# Try to run the setup program - first look for a GTK2 binary
try_run setup.gtk2 $args $* 2> /dev/null
status=$?
if [ $status -ne 0 ] && [ $status -ne 2 ] && [ $status -ne 3 ] ; then 
    try_run setup.gtk $args $* 
    status=$?
    if [ $status -ne 0 ] && [ $status -ne 2 ] && [ $status -ne 3 ] ; then  # setup.gtk couldn't connect to X11 server - ignore
        try_run setup $args $*
        status=$?
        if [ $status -ne 0 ] && [ $status -ne 2 ] && [ $status -ne 3 ] ; then
            echo "The setup program seems to have failed on $arch/$libc"
            echo
            echo $FATAL_ERROR
        fi
    fi
fi

exit $status