La til noen sikkerhetsrelaterte sjekker i minecraft.sh

diff --git a/minecraft.sh b/minecraft.sh
index 70b1bf6f5ad290ef64924f0baa71388985796cf1..93cdbdc44d197e58fdce63d1d13b2b943c846177 100755 (executable)
--- a/minecraft.sh
+++ b/minecraft.sh
@@ -18,8 +18,11 @@
 # Released to the public under the WTFPL: http://sam.zoy.org/wtfpl/COPYING
 
 # CONFIG STUFF - change these to suit your system
+# Minecraft home folder, where the binaries and saves and stuff are stored:
 MC_HOME="${HOME}/.minecraft"
+# Location and filename for the Minecraft launcher jar:
 MC_LAUNCHER="${HOME}/bin/minecraft.jar"
+# Command line to run to start Minecraft:
 MC_COMMAND="java -Xmx2048M -Xms1024M -cp ${MC_LAUNCHER} net.minecraft.LauncherFrame"
 
 # This might be needed to fix 64bit java on Linux (path to your 64bit java libs)
@@ -34,18 +37,28 @@ if [ ${#} -ne 1 ]; then
        exit 1
 fi
 
+if [ -z ${MC_HOME} ]; then
+       echo "Minecraft home folder not set! Baaaad idea!"
+       exit 1
+fi
+
+if [ ! -d ${MC_HOME} ]; then
+       echo "Minecraft home folder (${MC_HOME}) not found!"
+       exit 1
+fi
+
 MC_VERSION_FOLDER="${MC_HOME}/bin-${1}"
 MC_WORKING_FOLDER="${MC_HOME}/bin"
 
 if [ ! -d "${MC_VERSION_FOLDER}" ]; then
-       echo "Could not find that version folder."
+       echo "Could not find that version folder (${MC_WORKING_FOLDER})."
        exit 1
 fi
 
 if [ -d "${MC_WORKING_FOLDER}" ]; then
        rm -rf ${MC_WORKING_FOLDER}
 elif [ ! -d "${MC_WORKING_FOLDER}" ]; then
-       echo "Minecraft bin folder is not a directory, bailing out."
+       echo "Minecraft bin folder (${MC_WORKING_FOLDER}) is not a directory, bailing out."
        exit 1
 fi