#!/bin/sh -u
#
#     $0 [ args... ]
#
# A script that prompts the user for an output file name and then
# echoes all its command line arguments into that file.
#
# WARNING: Many of the comments in this file are "Instructor-Type"
#   comments and are *not* appropriate for real scripts.  Do not put
#   "Instructor-Type" comments into the scripts that you submit for marking.
#   I put them in my example files because I am teaching you how to
#   write scripts; do not submit my teaching comments back to me again.
#   Read the week7.txt notes for more details on good comment style.
#
# -IAN! idallen@ncf.ca
# June 20 2001

# All scripts must start with lines similar to these two.
# This script doesn't use any system or GUI commands, so all the
# commands should be available in the standard Unix directories.
#
# The script isn't one that requires its output files to be protected,
# so it uses the standard Unix umask.
#
export PATH=/bin:/usr/bin
umask 022

date

# Print some information about the script and its arguments.
# Note that you don't need to escape single quotes inside double
# quotes; the double quotes already do the escaping.
# The "-u" option to /bin/sh (on the first line, above) will cause this
# script to die if there are not at least two command line arguments.
# I want my scripts to stop if arguments are missing or undefined.
#
echo "$0: I am process ID $$ and I have $# command line arguments."
echo "The first command line argument is '$1'."
echo "The second command line argument is '$2'."

# Prompt for (on standard error!) and read an output file name.
#
echo 1>&2 "Please enter an output file name:"
read filename

# Put all the arguments into the output file.
# For the "echo" command, "$@" would work just as well.
#
echo "$*" >"$filename"

# Print a chatty exit message and exit.
# Note that you don't need to escape single quotes inside double
# quotes; the double quotes already do the escaping.
#
echo "I have put all $# command line arguments into file '$filename'."
echo "Goodbye!"

# Since this script doesn't set an explicit exit status using the
# "exit" command, the script exits with the status of the last command
# that it ran, above.