Radix cross Linux

#!/bin/sh

# program name:
program=`basename $0`

# 16 = root path has not specified arter --root option
# 91 = root path not correct
# 92 = Cannot create '/tmp/...' directory
EXITSTATUS=0

CWD=`pwd`

umask 022
if [ ! -z "$TMPDIR" ] ; then mkdir -p $TMPDIR ; fi
TMP=$(mkdir -p /tmp/radix && mktemp -d -p /tmp/radix $program.XXXXXXXX) || { echo "Cannot create '/tmp/...' directory" ; exit 92; }
trap "rm -rf $TMP" EXIT


TARGET_ROOT_PATH=

usage() {
 cat << EOF

Usage: $program [options]

$program - Radix Linux timezone configuration utility.

options:
   --root <DIR>   - Configure timezone someplace else, like <DIR>.

EOF
}


check_abs_paths()
{
  if [ ! -z "$TARGET_ROOT_PATH" ] ; then
    if [[ ${TARGET_ROOT_PATH:0:1} != "/" ]] ; then
      TARGET_ROOT_PATH=$CWD/$TARGET_ROOT_PATH
    fi
    TARGET_ROOT_PATH="$(echo "$TARGET_ROOT_PATH" | sed -e "s/\/$//")/"
  fi
}

#
# Parse options:
#
while [ 0 ]; do
  if [ "$1" = "-h" -o "$1" = "--help" ]; then
    usage
    exit 0
  elif [ "$1" = "--root" ]; then
    if [ "$2" = "" ]; then
      usage
      echo "ERROR: Target ROOT directory has not specified. Check --root option."
      EXITSTATUS=17
      exit $EXITSTATUS
    fi
    TARGET_ROOT_PATH="$2"
    shift 2
  else
    break
  fi
done

check_abs_paths

if [ -z "$TARGET_ROOT_PATH" ] ; then
  TARGET_ROOT_PATH="/"
fi

if [ ! -d $TARGET_ROOT_PATH ] ; then
  echo "ERROR: Target ROOT path specified but not correct."
  EXITSTATUS=91
  exit $EXITSTATUS
fi

: ${DIALOG=dialog}
: ${DIALOGRC=${TARGET_ROOT_PATH}etc/dialogrc}

#
# The hardware clock configuration files:
#
HWCLOCK_CONF=${TARGET_ROOT_PATH}etc/hardwareclock
ADJTIME_CONF=${TARGET_ROOT_PATH}etc/adjtime

#
# setzone( $TIMEZONE )
#
# This function accepts a time zone as the only parameter
# and sets it as the default system time zone.
#
setzone()
{
  TZ=$1

  cd ${TARGET_ROOT_PATH}etc
  if [ -r ${TARGET_ROOT_PATH}usr/share/zoneinfo/$TZ -o \
       -L ${TARGET_ROOT_PATH}usr/share/zoneinfo/$TZ    ] ; then
      ln -sf ../usr/share/zoneinfo/$TZ localtime-copied-from
      rm -f localtime-copied-from
      rm -f localtime
      ln -sf ../usr/share/zoneinfo/$TZ localtime
      cd ..
   fi
}

#
# writeconf( $CLOCK_SET_TO )
#
# Writes out $HWCLOCK_CONF that tells rc.S how the hardware clock value is stored.
#
writeconf()
{
   echo "#"                                               > $HWCLOCK_CONF
   echo "# /etc/hardwareclock"                           >> $HWCLOCK_CONF
   echo "#"                                              >> $HWCLOCK_CONF
   echo "# Tells how the hardware clock time is stored." >> $HWCLOCK_CONF
   echo "# You should run timeconfig to edit this file." >> $HWCLOCK_CONF
   echo ""                                               >> $HWCLOCK_CONF
   echo $1 >> $HWCLOCK_CONF
}

write_adjtime()
{
  if [ ! -f "$ADJTIME_CONF" ] ; then
    echo "0.0 0 0.0"  > $ADJTIME_CONF
    echo "0"         >> $ADJTIME_CONF
    echo $1 >> $ADJTIME_CONF
  else
    if [ "$1" = "UTC" ] ; then
      sed -i 's,^LOCAL,UTC,' $ADJTIME_CONF
    else
      sed -i 's,^UTC,LOCAL,' $ADJTIME_CONF
    fi
  fi
}

#
# Ask the user if the hardware clock is set for UTC/GMT
#
cat > $TMP/menu-utc$$ << EOF
--colors \\
--backtitle "\Z7Radix\Zn \Z1cross\Zn\Z7 Linux\Zn" \\
--title " \Z4\ZbSet Hardware Clock\ZB\Zn " \\
--menu "\\n\\
 Is the hardware clock set to Coordinated Universal Time (UTC/GMT)?\\n\\
 If it is, select YES here.\\n\\n\\
 If the hardware clock is set to the current local time (this is how\\n\\
 most PCs are set up), then say NO here.\\n\\n\\
 If you are not sure what this is, you should answer NO here.\\n\\
" 16 74 2 \\
"NO" "Hardware clock is set to local time" \\
"YES" "Hardware clock is set to UTC" \\
EOF

$DIALOG --file $TMP/menu-utc$$ 2> $TMP/utc$$
if [ $? = 1 -o $? = 255 ]; then
  rm -f $TMP/utc$$
  rm -f $TMP/menu-utc$$
  exit
fi
if [ "`cat $TMP/utc$$`" = "YES" ]; then
  # yes, the hardware clock is UTC
  writeconf "UTC"
  write_adjtime "UTC"
else # must be NO
  writeconf "localtime"
  write_adjtime "LOCAL"
fi
rm -f $TMP/utc$$
rm -f $TMP/menu-utc$$

#
# Ask the user which timezone is preffered
#
cat > $TMP/menu-tz$$ << EOF
--colors \\
--backtitle "\Z7Radix\Zn \Z1cross\Zn\Z7 Linux\Zn" \\
--title " \Z4\ZbTimezone Configuration\ZB\Zn " \\
--menu "\\n\\
 Please select one of the following timezones for your machine:\\n\\
" 22 74 14 \\