#!/bin/sh
# GIMME - "gimme' a file"
# Demonstrate rdist's ability to give me permission to access anything.
#
# gimme <pathname> [<permission> [<directory>]]
#<pathname> is the target file.
#<permission> is the octal mode to which the file access permission
#should be set.  Note that this may not be effective unless
#either the SUID (4000) or SGID (2000) bits are also requested.
#<directory> is the target directory for rdist to use if a hard
#link is desired.  Note that the user must have permission
#to create this directory, it must be on the same filesystem
#as the target file, and the target file must not be a
#directory.  This option is necessary to change the ownership
#of the target if chown() of a symbolic link modifies the
#link itself, and not the file it refers to.
#
# 1991.9.14 -Tsutomu Shimomura, Los Alamos National Laboratory
#tsutomu@no-sense.LANL.GOV

dirname=gimme$$
deftemp=/tmp
defperm=6777

if [ $1x = x ]; then
echo "Usage: $0 <pathname> [<permission> [<directory>]]" >&2
exit 1
fi

if [ $2x != x ]; then
perm=$2
else
perm=$defperm
fi

if [ $3x != x ]; then
link="ln"
temp=$3/$dirname
target=$1
else
link="ln -s"
temp=$deftemp/$dirname
case $1 in
/*)
target=$1
;;
*)
target=`pwd`/$1
;;
esac
fi

trap "rm -fr $temp; exit 1"  1 2 15
umask 66
mkdir $temp; if [ $? != 0 ]; then
exit 1
fi

set `whoami` $LOGNAME
user=$1
set daemon `groups`
while [ $# != 1 ]; do
shift
done
group=$1

(
echo "t$temp/something"
echo "R0 $perm 1 0 $user $group "

while [ ! -f $temp/rdist* ]; do
sleep 1
done

set $temp/rdist*
rm -f $1
if $link $target $1 >&2; then
echo "" | dd bs=3 conv=sync 2>/dev/null
echo ""

echo 0 > $temp/status
else
echo 1 > $temp/status
fi

exit
) | rdist -Server

status=`cat $temp/status`
rm -fr $temp
echo "Status=$status"
exit $status