#!/bin/sh
#
user=`whoami`
self=`basename $0 .sh`
folder="/u/$user/.elm"
aliasfile="aliases.text"
tempfile1="aliases.raw.$$.tmp"
tempfile2="aliases.sorted.$$.tmp"
#
umask 177
#
if [ ! \( -d "$folder" -a -r "$folder" -a -w "$folder" -a -x "$folder" \) ]
then
    echo                                   >&2
    echo "Can't open directory '$folder'!" >&2
    echo                                   >&2
    exit 1
fi
#
cd $folder
#
ok=""
#
if [ -f $aliasfile ]
then
    if [ -r $aliasfile -a -w $aliasfile ]
    then
        ok="true"
    else
        chmod 600 $aliasfile
        if [ -r $aliasfile -a -w $aliasfile ]
        then
            ok="true"
        fi
    fi
else
    cp /dev/null $aliasfile
    chmod 600 $aliasfile
    if [ -f $aliasfile -a -r $aliasfile -a -w $aliasfile ]
    then
        ok="true"
    fi
fi
#
if [ "$ok" = "" ]
then
    echo                                         >&2
    echo "Can't open file '$folder/$aliasfile'!" >&2
    echo                                         >&2
    exit 1
fi
#
rc=0
trap 'rm -f $tempfile1 ; rm -f $tempfile2 ; exit $rc' 0
trap 'rm -f $tempfile1 ; rm -f $tempfile2 ; exit 1' 1 2 3 14 15
#
cat $aliasfile >$tempfile1
#
gawk -f /opt/lib/$self/$self.awk </opt/lib/aliman/aliases >>$tempfile1
rc=$?
#
if [ "$rc" != "0" ]
then
    echo                                                                    >&2
    echo "'awk' reports error '$rc' while creating temporary aliases file!" >&2
    echo                                                                    >&2
    exit
fi
#
trap '' 2
#
sort +0 -1 -u <$tempfile1 >$tempfile2
rc=$?
#
if [ "$rc" != "0" ]
then
    echo                                         >&2
    echo "Couldn't sort temporary aliases file!" >&2
    echo                                         >&2
    exit
fi
#
rm -f $aliasfile
mv $tempfile2 $aliasfile
#
/opt/bin/newalias
rc=$?
#
if [ "$rc" != "0" ]
then
    echo                                                           >&2
    echo "New aliases could not be installed successfully in elm!" >&2
    echo                                                           >&2
    exit
fi
#
echo
echo "New aliases for user '$user' successfully installed."
echo
exit
#
#### EOF ####