#!/bin/sh -u
# Output a list of partitions and types for a given disk letter
# ------------------------------------------------------------------
# Syntax:  $0 disk_letter
# ------------------------------------------------------------------
# Purpose: Output a list of partitions and types for the given disk letter.
#  Validate the input first.  (see script_style.txt)
#  Bug: If the partition type is longer than 3 words, we don't output it all.
# ------------------------------------------------------------------
# <NET2003 assignment label goes here>
# Comment: many required comments are missing from this sample solution
# ------------------------------------------------------------------

# standard search path plus system maintenance path too
PATH=/bin:/usr/bin:/sbin ; export PATH
umask 022
LC_COLLATE=C ; export LC_COLLATE

# input argument count validation (required)
if [ $# -ne 1 ] ; then
    echo 1>&2 "$0: Expecting one disk letter argument, found $# ($*)"
    exit 1
fi
letter="$1"

# more input validation (not required)
if [ "$letter" = "" ] ; then
    echo 1>&2 "$0: Disk drive letter is empty; nothing done"
    exit 1
fi
drive="/dev/hd$letter"
echo "Using disk drive letter '$letter' and drive '$drive'"

# drive target validation (required)
if [ ! -e "$drive" ] ; then
    echo 1>&2 "$0: Disk drive '$drive' does not exist"
    exit 1
fi

# processing and output; remove the boot flag asterisk
if part=$( sfdisk -l "$drive" ) ; then
    echo "$part" | grep "^$drive" | tr '*' ' ' | awk '{print $1, $7,$8,$9}'
else
    status=$?
    echo 1>&2 "$0: drive '$drive': status $status: cannot list with sfdisk"
    exit $status
fi