Help with massive uid/gid change.

[ofer at TAURUS.BITNET]

Hello
I have to change the uid/gid numbers for all the users on a system
I'd like to do it doing one pass over the file system and not by
doing n times 'find ....' for n=the number of users.
I have an old /etc/passwd file and a new one and wish to use them
as the base for this number swapping process.
I have perl and all standard unix available.
Many thanks.
Ofer Lapid
email: <ofer at genius.tau.ac.il>||<ofer at math.tau.ac.il>||<ofer at taurus.bitnet>