From 64ebbbd2e3f5787ca4245f165507a882872b97c3 Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@tuebingen.mpg.de>
Date: Tue, 26 Aug 2014 21:52:07 +0200
Subject: [PATCH] gsu: Don't fail if HOME is unset.

As pointed out by Joffrey Fitz, gsu-based scripts do not work when
run as a user without home directory. This happens for example if
the script is executed through a web application as the www-data user.

This patch replaces all references to HOME by ${HOME:-}, i.e. we just
default to the empty string but don't fail immediately.
---
 misc/gsu/config     | 4 ++--
 misc/gsu/gui        | 2 +-
 misc/gsu/subcommand | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/misc/gsu/config b/misc/gsu/config
index 6edd502..09330f3 100644
--- a/misc/gsu/config
+++ b/misc/gsu/config
@@ -4,7 +4,7 @@
 # file.
 gsu_check_options()
 {
-	local i conf="${gsu_config_file:=$HOME/.$gsu_name.rc}" val
+	local i conf="${gsu_config_file:=${HOME:-}/.$gsu_name.rc}" val
 
 	for ((i=0; i < ${#gsu_options[@]}; i++)); do
 		eval "${gsu_options[$i]}"
@@ -79,7 +79,7 @@ gsu_check_options_or_die()
 }
 
 if [[ "$(type -t _gsu_setup)" != "function" ]]; then
-	gsu_dir=${gsu_dir:=$HOME/.gsu}
+	gsu_dir=${gsu_dir:=${HOME:-}/.gsu}
 	. $gsu_dir/common || exit 1
 	_gsu_setup
 fi
diff --git a/misc/gsu/gui b/misc/gsu/gui
index 99da51a..eb9f29f 100644
--- a/misc/gsu/gui
+++ b/misc/gsu/gui
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 if [[ $(type -t gsu_is_a_number) != "function" ]]; then
-	GSU_DIR=${GSU_DIR:=$HOME/.gsu}
+	GSU_DIR=${GSU_DIR:=${HOME:-}/.gsu}
 	. $GSU_DIR/common || exit 1
 fi
 
diff --git a/misc/gsu/subcommand b/misc/gsu/subcommand
index 3a1bc6d..f1685aa 100644
--- a/misc/gsu/subcommand
+++ b/misc/gsu/subcommand
@@ -2,7 +2,7 @@
 # (C) 2006-2011 Andre Noll
 
 if [[ $(type -t gsu_is_a_number) != "function" ]]; then
-	GSU_DIR=${GSU_DIR:=$HOME/.gsu}
+	GSU_DIR=${GSU_DIR:=${HOME-}/.gsu}
 	. $GSU_DIR/common || exit 1
 fi
 
@@ -90,7 +90,7 @@ options, the command prints out a list of all cmt config variables, together
 with their current value and the default value."
 _com_prefs()
 {
-	local i conf="${gsu_config_file:=$HOME/.$gsu_name.rc}"
+	local i conf="${gsu_config_file:=${HOME:-}/.$gsu_name.rc}"
 
 	gsu_getopts "e"
 	eval "$result"
-- 
2.39.2