How to Perform Split IMPORT in Unix environment?

#Split_Import
############################# BEFORE YOU START ################################################
#Purpose: If the export dump files are in split state you can run this script to do the import#
#Please put the password for SYSTEM #
#check the directory where you have kept the export dump files #
#check the directory where import logfiles will be created #
###############################################################################################
#!/bin/ksh
#
# splitimport
#
# Tue Dec 14 10:04:07 NFT 1999 Olle Welinder
#
trap 'rm -f $PIPES' EXIT QUIT
#
set -x
export NLS_LANG=AMERICAN_AMERICA.UTF8
export ORACLE_SID=ORADB
PREFIX=ORADB
DUMPDIR=/export
FILELIST=$(ls ${DUMPDIR}/${PREFIX}*)
SPLITP="/tmp/split_pipe"
COMPRP="/tmp/compress_pipe"
PIPES="$SPLITP $COMPRP"
ORAUSER=system
ORAPASSWD=
#
# Create named pipes
for a in $PIPES;do
mknod $a p
done
#
cat $FILELIST > $SPLITP &
sleep 5
uncompress < ${SPLITP} > ${COMPRP} &
sleep 60
#
imp ${ORAUSER}/${ORAPASSWD} file=${COMPRP} fromuser=USER1,USER2 touser=USER1, USER2 commit=y analyze=n ignore=n rows=y log=/export/USER_imp.log