This will do the job
File starts from the line "#!/bin/bash
--- ---------------------------------------
#!/bin/bash
#----------------------------------------------------------------------------------
#AUTHOR: William Ampeh
#PURPOSE: Reads input from $1 (a file) and print output to $2 (another
file)
#---------------------------------------------------------------------------------
if [ $# -ne 2 ]
then
echo ""; echo ""; echo "USAGE: $0 {input file} {ouput filename}"; echo
""
echo " EG: $0 infile.txt outfile.txt"; echo ""; echo ""; exit 1
fi
INFILE=$1; OUTFILE=$2
#.................... in case user switches order
..............................
[ -s $OUTFILE ] && { echo "ERROR: $OUTFILE already exists. Remane or
delete it"; echo ""; exit 2; }
#................... keeping track of old file handlers
.........................
exec 4<&0 #save stdin handle, just a safety precaution in case you want
to
#read input from keyboard somewhere in this script
exec 5<&1 #save stdout handle, just a safety precaution in case you want
to
#write to screen somewhere in this script
exec 0< $INFILE #opens $INFILE as file handle 0 (stdin)
exec 1> $OUTFILE #opens $OUTFILE as file handle 1 (stdout)
while read cell1 cell2 cell3 rest_of_line
do
echo "column2 = $cell2 -- rest of line = $rest_of_line "
#say
#........ do some more manipulations
done
#........................... restore old file handlers
.........................
exec 0<&4; exec 1<&5
echo ""; echo ""; echo " DONE"
exit 0
#--------------------------------------------------------------
# TRY THIS ON THE FOLLOWING INPUT FILE
#l1_c1 l1_c2 l1_c3 l1_c4 l1_c5
#l2_c1 l2_c2 l2_c3 l2_c4 l2_c5
#l3_c1 l3_c2 l3_c3 l3_c4 l3_c5
#l4_c1 l4_c2 l4_c3 l4_c4 l4_c5
#l5_c1 l2_c2 l2_c3 l2_c4 l2_c5
#l6_c1 l6_c2 l6_c3 l6_c4 l6_c5
#The output will be:
#column2 = l1_c2 -- rest of line = l1_c4 l1_c5
#column2 = l2_c2 -- rest of line = l2_c4 l2_c5
#column2 = l3_c2 -- rest of line = l3_c4 l3_c5
#column2 = l4_c2 -- rest of line = l4_c4 l4_c5
#column2 = l2_c2 -- rest of line = l2_c4 l2_c5
#column2 = l6_c2 -- rest of line = l6_c4 l6_c5
__________________
William Ampeh (x3939)
Federal Reserve Board
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