Added a function to make the script dir the pwd

mkdxsinitrd and ld4-inst can now be called from everywhere,
including the possibility to call them by a (soft) link


git-svn-id: http://svn.openslx.org/svn/openslx/ld4@193 95ad53e4-c205-0410-b2fa-d234c58c8868

1 files changed, 38 insertions, 1 deletions

diff --git a/installer/ld4-inst b/installer/ld4-inst
index 94b2265d..e30334f8 100755
--- a/installer/ld4-inst
+++ b/installer/ld4-inst
@@ -9,6 +9,7 @@
 # Copyright:    (c) 2003, 2006 - RZ Universitaet Freiburg
 #
 # Version:	0.2.0d
+DEBUG=2
 
 header() {
   echo
@@ -16,6 +17,39 @@ header() {
   echo
 }
 
+# This function makes the directory of this script to the present working directory
+# It is called within precheck()
+# Does also work when called by a link. FIXME: Breaks when called by a link to a link
+goto_script_dir()
+{
+  [ $DEBUG -ge 2 ] && echo "Aufgerufen wurde $0, checking if it is a link"
+  calleddetails=`ls -l $0` # get the file flags (e.g. lrwxrwxrwx)
+  [ $DEBUG -ge 2 ] && echo $calleddetails
+  index=`expr index "$calleddetails" "l"`
+
+  calleddir=${0%/*}  # Strip the filename from path
+  [ $DEBUG -ge 2 ] && echo "Wechsele ins Verzeichnis des aufgerufenen scripts/links ($calleddir)"
+  cd $calleddir
+
+
+  if [ $index -eq 1 ]; then
+    [ $DEBUG -ge 2 ] && echo "It is a link"
+
+    script=`echo $calleddetails | awk '{print $NF}'`
+    [ $DEBUG -ge 2 ] && echo "The script is: $script"
+    hasslash=`expr index "$script" "/"`
+    if [ $hasslash -ne 0 ]; then 
+      scriptdir=${script%/*}
+      [ $DEBUG -ge 2 ] && echo "Following link to $scriptdir"
+      cd $scriptdir
+    else
+      [ $DEBUG -ge 2 ] && echo "It is in the same directory as the link"
+    fi
+  fi
+  [ $DEBUG -ge 2 ] && pwd
+
+}
+
 
 # check needed things for installation
 precheck() {
@@ -24,7 +58,10 @@ precheck() {
     echo -e "\nYou don't have the needed permission. Please rerun as root user!\n"
     exit 1
   fi
-
+  
+  # switch pwd to this scripts location
+  goto_script_dir
+  
   # check for existing programs:
   # rsync (server-side)
   which rsync >/dev/null