add leading '0' to zip codes 1

[mwesticle]

Hi there... I have an easy question today... I have a file with fields of a fixed width. the file contains names and 5-digit zip codes. Some zip codes appear to have only four digits, because the leading zero has been truncated somewhere in a previous process. The zip code appears in byte 1-5. I need to add that zero back into the zip codes for each record where byte 1 is a space. Example:

55555
12345
2345
3333
66666

needs to look like this:

55555
12345
02345
03333
66666

Any takers? Thanks for the assistance!

 

[PHV]

Try something like this:

sed -e 's!^ !0!' /path/to/input >output

or the awk way:

awk '{
 printf "%05d%s\n",substr($0,1,5),substr($0,6)
}' /path/to/input >output

Hope This Help
PH.