Fixes to shell scripts to check for errors and other improvements

[fs/lustre-release.git] / lustre / demos / basesetup.sh

diff --git a/lustre/demos/basesetup.sh b/lustre/demos/basesetup.sh
index 8874372..7cecc93 100755 (executable)
--- a/lustre/demos/basesetup.sh
+++ b/lustre/demos/basesetup.sh
@@ -1,36 +1,47 @@
 #! /bin/sh
 # Get the locations for the files from a single place to avoid confusion
 OBDDIR="`dirname $0`/.."
-[ "$OBDDIR" = "" ] && OBDDIR=".."
+[ "$OBDDIR" = "./.." ] && OBDDIR=".."
+
+# source config info
 . $OBDDIR/demos/config.sh
 
-#if [ "$TMPFILE" -a -f $TMPFILE ]; then 
-#    echo "$TMPFILE exists; I'm unwilling to overwrite it." 1>&2
-#    exit 1
-#fi
+[ ! -d $MNTOBD ] &&  mkdir $MNTOBD
+[ ! -d $MNTSNAP ] &&  mkdir $MNTSNAP
+[ ! -d $MNTSNAP2 ] &&  mkdir $MNTSNAP2
+
+
+# temp file
+if [ "$TMPFILE" -a -f $TMPFILE ]; then 
+    echo "$TMPFILE exists; I'm unwilling to overwrite it." 1>&2
+    exit 1
+fi
+[ "$TMPFILE" ] && dd if=/dev/zero of=$TMPFILE bs=1k count=10k
 
-# We assume the loop module will be installed by kerneld if required.
-# If not, the following line should be uncommented.
-#insmod loop
 
+# loop device
+insmod loop > /dev/null 2>&1
 if [ "$LOOPDEV" -a "`losetup $LOOPDEV 2> /dev/null`" ]; then
     echo "It appears that $LOOPDEV is in use.  Unable to continue" 1>&2
     echo "You need to clean up $LOOPDEV (via cleanup.sh),"
     echo "or you can change which device is used in demos/config.sh" 1>&2
+    # undo previous
+    rm $TMPFILE
     exit 2
 fi
 
+[ "$LOOPDEV" ] && losetup $LOOPDEV $TMPFILE
 # Ensure that we have the correct devices for OBD to work
 [ ! -c /dev/obd0 ] && mknod /dev/obd0 c $OBDMAJ 0
 [ ! -c /dev/obd1 ] && mknod /dev/obd1 c $OBDMAJ 1
 [ ! -c /dev/obd2 ] && mknod /dev/obd2 c $OBDMAJ 2
 
-[ "$TMPFILE" ] && dd if=/dev/zero of=$TMPFILE bs=1k count=10k
 
-[ "$LOOPDEV" ] && losetup $LOOPDEV $TMPFILE
 if [ "$BASEDEV" ]; then
     mke2fs -b 4096 $BASEDEV
 else
     echo "\$BASEDEV not defined in demos/config.sh.  Please fix!"
-    exit 1
+    [ "$LOOPDEV" ] && losetup -d $LOOPDEV 
+    rm $TMPFILE
+    exit 3
 fi