Some uid/gid protections against 0.

@@ -4,12 +4,12 @@ set -ex
 
 hostuser_home="$(getent passwd hostuser | cut -f 6 -d :)"
 
-if [[ $GID ]]; then
+if [[ $GID && $GID -ne 0 ]]; then
 	old_gid=$(getent group hostgroup | cut -f 3 -d :)
 	groupmod -g $GID hostgroup
 	find "$hostuser_home" -gid $old_gid -print0 | xargs -0r chgrp hostgroup
 fi
-if [[ $UID ]]; then
+if [[ $UID && $UID -ne 0 ]]; then
 	usermod -u $UID hostuser
 fi
 

@@ -6,17 +6,13 @@ _mysql() {
 	mysqld_safe "$@"
 }
 
-if [[ $GID ]]; then
+if [[ $GID && $GID -ne 0 ]]; then
 	old_gid=$(getent group mysql | cut -f 3 -d :)
 	groupmod -g $GID mysql
-else
-	found_errors+=("gid not set")
 fi
 
-if [[ $UID ]]; then
+if [[ $UID && $UID -ne 0 ]]; then
 	usermod -u $UID mysql
-else
-	found_errors+=("uid not set")
 fi
 
 if [[ $(find /var/lib/mysql -maxdepth 1 -mindepth 1|wc -l) = 0 ]]; then
@@ -24,13 +20,6 @@ if [[ $(find /var/lib/mysql -maxdepth 1 -mindepth 1|wc -l) = 0 ]]; then
 	zcat /var/lib/container/var_lib_mysql.tar.gz | tar -C /var/lib/mysql -xf -
 fi
 
-if [[ ${#found_errors[*]} -gt 0 ]]; then
-	for error in "${found_errors[@]}"; do
-		echo "$error"
-	done
-	exit 1
-fi
-
 declare -i i=0
 mysqld_safe --skip-networking &
 while eval [[ \$DB_INFO_$i ]]; do

@@ -4,12 +4,12 @@ set -ex
 
 node_home="$(getent passwd node | cut -f 6 -d :)"
 
-if [[ $GID ]]; then
+if [[ $GID && $GID -ne 0 ]]; then
 	old_gid=$(getent group node | cut -f 3 -d :)
 	groupmod -g $GID node
 	find "$node_home" -gid $old_gid -print0 | xargs -0r chgrp node
 fi
-if [[ $UID ]]; then
+if [[ $UID && $UID -ne 0 ]]; then
 	usermod -u $UID node
 fi
 if [[ -e package.json ]]; then

@@ -4,12 +4,12 @@ set -ex
 
 hostuser_home="$(getent passwd hostuser | cut -f 6 -d :)"
 
-if [[ $GID ]]; then
+if [[ $GID && $GID -ne 0 ]]; then
 	old_gid=$(getent group hostgroup | cut -f 3 -d :)
 	groupmod -g $GID hostgroup
 	find "$hostuser_home" -gid $old_gid -print0 | xargs -0r chgrp hostgroup
 fi
-if [[ $UID ]]; then
+if [[ $UID && $GID -ne 0 ]]; then
 	usermod -u $UID hostuser
 fi
 mkdir -p /run/php

@@ -4,12 +4,12 @@ set -ex
 
 hostuser_home="$(getent passwd hostuser | cut -f 6 -d :)"
 
-if [[ $GID ]]; then
+if [[ $GID && $GID -ne 0 ]]; then
 	old_gid=$(getent group hostgroup | cut -f 3 -d :)
 	groupmod -g $GID hostgroup
 	find "$hostuser_home" -gid $old_gid -print0 | xargs -0r chgrp hostgroup
 fi
-if [[ $UID ]]; then
+if [[ $UID && $UID -ne 0 ]]; then
 	usermod -u $UID hostuser
 fi
 

 #!/bin/bash
 
-declare -a found_errors
-
 set -ex
 
 if [[ $(find /var/lib/postgresql -maxdepth 1 -mindepth 1|wc -l) = 0 ]]; then
@@ -10,13 +8,13 @@ fi
 
 postgres_home="$(getent passwd postgres | cut -f 6 -d :)"
 
-if [[ $GID ]]; then
+if [[ $GID && $GID -ne 0 ]]; then
 	old_gid=$(getent group postgres | cut -f 3 -d :)
 	groupmod -g $GID postgres
 	find "$postgres_home" /etc/postgresql /var/run/postgresql -gid $old_gid -print0 | xargs -0r chgrp postgres
 fi
 
-if [[ $UID ]]; then
+if [[ $UID && $UID -ne 0 ]]; then
 	old_uid=$(getent passwd postgres | cut -f 3 -d :)
 	usermod -u $UID postgres
 	find /etc/postgresql /var/run/postgresql -uid $old_uid -print0 | xargs -0r chown postgres

@@ -4,12 +4,12 @@ set -ex
 
 hostuser_home="$(getent passwd hostuser | cut -f 6 -d :)"
 
-if [[ $GID ]]; then
+if [[ $GID && $GID -ne 0 ]]; then
 	old_gid=$(getent group hostgroup | cut -f 3 -d :)
 	groupmod -g $GID hostgroup
 	find "$hostuser_home" -gid $old_gid -print0 | xargs -0r chgrp hostgroup
 fi
-if [[ $UID ]]; then
+if [[ $UID && $UID -ne 0 ]]; then
 	usermod -u $UID hostuser
 fi