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#!/bin/bash
set -e -o pipefail
IFS=/ read n pid uid <<< "$1"
[ "$pid" ]
[ "$uid" -gt 0 ]
IFS=: read username realname _ _ gecos homedir shell < <(getent passwd "$uid")
authtype=
while read -d ''
do
case "${REPLY%%=*}" in
'SSH_USER_AUTH' ) read authtype keytype keyvalue < "${REPLY#*=}" ;;
'SSH_ORIGINAL_COMMAND' ) SSH_ORIGINAL_COMMAND=${REPLY#*=} ;;
esac
done < /proc/$pid/environ
[ "$authtype" = publickey ]
keyhash=
while read
do
set -- $REPLY
if [ "$3 $5" = 'SSHFP 2' ]
then
keyhash=$6
break
fi
done < <(ssh-keygen -f <(printf '%s\n' "$keytype $keyvalue") -r .)
[ "$keyhash" ]
case "$SSH_ORIGINAL_COMMAND" in
*\"* ) exit 1 ;;
fossil\ test-http\ * ) ;;
*) exit 1 ;;
esac
# This is no way to do it.
# Let's just share /home/*/src and /srv/src and /usr/src.
fossil_dir=$homedir/src/fossil
upstreamDatabase=$fossil_dir/db
readWriteDbName=db.fossil # Must end in .fossil for 'fossil test-http' to find it.
readWriteDir=$fossil_dir/remotes/$keyhash
as_user()
{
setpriv --reuid="$username" --init-groups --inh-caps=-all "$@"
}
if ! [ -d "$readWriteDir" ]
then
as_user mkdir "$readWriteDir"
fi
as_user cp -n --reflink -- "$upstreamDatabase" "$readWriteDir"/"$readWriteDbName"
exec systemd-run -P \
--property=User="$username" \
--property=ReadOnlyPaths=/ \
--property=ReadWritePaths="$readWriteDir" \
--property=WorkingDirectory="$readWriteDir" \
-- fossil test-http "$readWriteDbName"
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