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Set arbitrary vsftpd.conf options from the container environment #109

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Set arbitrary vsftpd.conf options from the container environment #109

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9d48e12
Update docker-entrypoint.sh
Michuelnik Mar 21, 2025
d26a731
Update docker-entrypoint.sh
Michuelnik Mar 21, 2025
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27 changes: 25 additions & 2 deletions src/docker-entrypoint.sh
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Original file line number Diff line number Diff line change
@@ -1,10 +1,11 @@
#!/bin/sh
FTP_DATA=/home/$FTP_USER
FTP_GROUP=$( getent group "$GID" | awk -F ':' '{print $1}' )
VSFTPD_CONF=/etc/vsftpd.conf

if test -z "$FTP_GROUP"; then
FTP_GROUP=$FTP_USER
addgroup -g "$GID" -S "$FTP_GROUP"
FTP_GROUP=$FTP_USER
addgroup -g "$GID" -S "$FTP_GROUP"
fi

adduser -D -G "$FTP_GROUP" -h "$FTP_DATA" -s "/bin/false" -u "$UID" "$FTP_USER"
Expand All @@ -13,6 +14,28 @@ mkdir -p $FTP_DATA
chown -R "$FTP_USER:$FTP_GROUP" "$FTP_DATA"
echo "$FTP_USER:$FTP_PASS" | /usr/sbin/chpasswd

env | grep -q '^VSFTPD_' && echo "Updating ${VSFTPD_CONF} from environment"
env \
| grep '^VSFTPD_' \
| sed -e 's/^VSFTPD_//' \
| while read envvar; do
varname="$( echo "$envvar" | cut -d= -f 1 )"
value="$( echo "$envvar" | cut -d= -f 2- )"

if grep -q -e "^${varname}[[:space:]]*=" "$VSFTPD_CONF"; then
old_value="$(grep -e "^${varname}[[:space:]]*=" "$VSFTPD_CONF" | sed -re 's/^[^=]+=//' | head -1 )"
if [ "$old_value" = "$value" ]; then
echo "Unchanged $envvar, not updating"
else
echo "Updating $envvar"
sed -ri "s/^${varname}[[:space:]]*=.*/${varname}=${value}/" "$VSFTPD_CONF"
fi
else
echo "Adding $envvar"
echo "${varname}=${value}" >>"$VSFTPD_CONF"
fi
done

sed -i -r "s/0.0.0.0/$PUBLIC_IP/g" /etc/vsftpd.conf

touch /var/log/vsftpd.log
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