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#!/bin/bash
# set permissions on a directory
# after any installation, if a directory needs to be (human) user-writable,
# run this script on it.
# It will make everything in the directory owned by the group $NB_GID
# and writable by that group.
# Deployments that want to set a specific user id can preserve permissions
# by adding the `--group-add users` line to `docker run`.
# uses find to avoid touching files that already have the right permissions,
# which would cause massive image explosion
# right permissions are:
# group=$NB_GID
# AND permissions include group rwX (directory-execute)
# AND directories have setuid,setgid bits set
set -e
for d in "$@"; do
find "$d" \
! \( \
-group $NB_GID \
-a -perm -g+rwX \
\) \
-exec chgrp $NB_GID {} \; \
-exec chmod g+rwX {} \;
# setuid,setgid *on directories only*
find "$d" \
\( \
-type d \
-a ! -perm -6000 \
\) \
-exec chmod u+s,g+s {} \;
done
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