Shell Programming and Scripting

0001|0003
0031|0031
0045|0049

0001
0002
0003
0031
0045
0046
0047
0048
0049

 
srcpath = /temp
tgtpath= /temp
 
srcfilename=x.txt
tgtfilename=y.txt
 
cd $srcpath
 
filesrc=${srcpath}'/'${srcfilename}
filetgt=${tgtpath}'/'${tgtfilename}
 
i=1
while [ $i -le `wc -l ${filesrc} | awk '{print $1}'` ] ; do
LINE_NO = $(awk 'print NR' ${filesrc})
FROM = $(awk '{${LINE_NO}; print {$1}}' ${filesrc})
TO = $(awk '{${LINE_NO}; print {$2}}' ${filesrc})
if [ "$FROM" = "$TO" ]; then
 
$FROM >> ${filetgt}
else
while ( $FROM <= $TO) 
do 
$FROM + 1 >> ${filetgt}
done
fi
$LINE_NO+1
done

while read x; do seq -f%04g `echo $x | cut -d'|' -f1` `echo $x | cut -d'|' -f2` >> y.txt; done < x.txt

# cat y.txt
0001
0002
0003
0031
0045
0046
0047
0048
0049

awk -F"|" '{for(i=int($1);i<=int($2);i++)printf("%04d\n", i)}' file

$ cat infile
0001|0003                                                                                                                                                                                                                                    
0031|0031                                                                                                                                                                                                                                    
0045|0049
$ cat script.awk
BEGIN {
    FS = "|" 
    OFS = "\n"
}

{
    diff = $2 - $1
    while ( diff >= 0 ) { 
        printf "%04i\n", $2 - (diff--)
    }   
}
$ awk -f script.awk infile
0001                                                                                                                                                                                                                                         
0002                                                                                                                                                                                                                                         
0003                                                                                                                                                                                                                                         
0031                                                                                                                                                                                                                                         
0045                                                                                                                                                                                                                                         
0046                                                                                                                                                                                                                                         
0047                                                                                                                                                                                                                                         
0048                                                                                                                                                                                                                                         
0049

while IFS='|' read a b; do printf "%04d\n" $(seq $a $b); done <yourfile

 
seq -w