- The document discusses various aspects of Unix programming using Perl, including handling errors, filehandles after forking processes, and signals. - It provides examples of how to properly check for errors, avoid resource collisions after forking, and make code cancellable using signals. - Key topics covered include using the Errno module to check for errors, closing filehandles after forks to prevent sharing issues, and trapping signals like SIGPIPE and SIGTERM.

1. Unix Programming with Perl Cybozu Labs, Inc. Kazuho Oku

15. File handles aren’t cloned by fork (2) Oct 16 2010 Unix Programming with Perl memory Parent Process Operating System File System lock owner, etc. File memory Another Process memory Child Process fork seek pos. / lock state, etc. File Control Info. open(file) seek pos. / lock state, etc. File Control Info. open(file)