simple/quotacheck/configure

#!/bin/sh
#
echo "#!/bin/sh" > customize
echo "sed \\" > customize
chmod +x customize

################################################################
# find a working perl:
#
for i in /usr/bin/perl /usr/local/bin/perl /usr/bin/perl5 /usr/local/bin/perl5
do
    if $i -e 'exit ($] < 5.000)'
    then
	echo $i works
	perl="$i"
	break
    fi
done
if [ -z "$perl" ]
then
    echo could not find a working perl command, sorry.
    exit 1
fi
echo "  -e 's,@@@perl@@@,$perl,g' \\" >> customize


################################################################
# find a working df:
#
for i in /bin/df /usr/bin/df /usr/bin/bdf /usr/sbin/df /usr/local/bin/df
do
    a=`$i | awk 'NR == 1 {print $2}'`
    if [ "$a" = "kbytes" -o "$a" = "1024-blocks" -o "$a" = "1k-blocks" ]
    then
	echo $i works
	df="$i"
	break
    fi
    a=`$i -k | awk 'NR == 1 {print $2}'`
    if [ "$a" = "kbytes" -o "$a" = "1024-blocks" ]
    then
	echo $i -k works
	df="$i -k"
	break
    fi
done
if [ -z "$df" ]
then
    echo could not find a working df command, sorry.
    exit 1
fi
echo "  -e 's,@@@df@@@,$df,g' \\" >> customize


################################################################
# find repquota:
#	We don't try to check whether the output is useful,
#	just check whether we can call it. You may need root
#	privileges for this to succeed.
#
for i in /usr/sbin/repquota 
do
    if $i -a
    then
	echo $i works
	repquota="$i"
	break
    fi
done
if [ -z "$repquota" ]
then
    echo could not find a working repquota command, sorry.
    exit 1
fi
echo "  -e 's,@@@repquota@@@,$repquota,g' \\" >> customize

################################################################
# find sendmail:
#	We don't try to check whether the mail is actually delivered,
#	just if sendmail accepts mail for a local user.
#	This may not be a very useful test.
#
user=`whoami`
for i in /usr/sbin/sendmail /usr/lib/sendmail
do
    if $i -t -i <<EOF
From: $user
To: $user
Subject: Testmail from configure (please ignore)

Test
EOF
    then
	echo $i works
	sendmail="$i"
	break
    fi
done
if [ -z "$sendmail" ]
then
    echo could not find a working sendmail command, sorry.
    exit 1
fi
echo "  -e 's,@@@sendmail@@@,$sendmail,g' \\" >> customize



################################################################
# finish: 
#	add a blank line to customize
echo >> customize