#!/bin/sh

# we want to find programs here, not in an inherited PATH
PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/sbin
export PATH

dest=servername
inst=INST2
month=`date +%b%Y`
logdir=/path/to/log/dir
logfile=${logdir}/xfer_${1}_${month}.log
fmask="iS*"

# open once with descriptor 4
exec 4>"$logfile"
find 
#exec 4>>"$logfile"
# writing to descriptor 4 will append to the open file

case $1 in

us)
    filedir=/path/to/us/dir
    destdir=/path/${inst}/path/us
;;
eu)
    filedir=/path/to/eu/dir
    destdir=/path/${inst}/path/eu
;;
*)
    echo "unexpected argument: $1"
    exit 1
;;

esac

# --------------------------------------------------
# functions
# --------------------------------------------------

usage () {

    echo "usage info"

}

header () {

    divider="=============================="
    divider=$divider$divider$divider

    printf "\n$divider\n" >&4
    echo "$1 -- `date`" >&4
    printf "$divider\n" >&4

}

# --------------------------------------------------
# main
# --------------------------------------------------

if [ $# -ne 1 ]; then

    usage
    exit 1

fi

# make sure we can go there
if cd $filedir
then

    files=`ls -- $fmask 2>/dev/null`
    header "$1 files to send"

    if [ -z "$files" ]; then

        printf "\n No $1 files to transfer" >&4

    else

        # a lazy printf "$files\n" or echo "$files" is at risk
        printf "%s\n" "$files" >&4

        header "Sending $1 files"
        # a trailing / makes sure it is a directory
        scp -- $fmask ${dest}:${destdir}/ >&4 2>&1

        if [ $? -ne 0 ]; then

            printf "\n  There are no files to transfer..." >&4
            header "Complete"

        else

            header "$1 files successfully sent"

            header "Moving files and purge 30+ days"
            mv -f -- $fmask ${filedir}/archive/ >&4 2>&1
# + collects arguments and calls the program very few times -> faster; no -- needed in find -exec prog {}
# HP-UX does not have -ls
            find ${filedir}/archive/ -type f -mtime +30 -exec ls -l {} + -exec rm -f {} + >&4 2>&1
            header "Finished moving files.."

        fi

    fi

fi

# explicit close of logfile not needed before an exit or end of file
#exec 4>&-

exit