Advanced Unix Programming Techniques with Perl

Unix Programming with Perl 2 DeNA Co., Ltd. Kazuho Oku

Writing correct code ,[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Last Year’s Talk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Last Year’s Slides ,[object Object],Oct 15 2011 Unix Programming with Perl 2

Today’s Talk ,[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

[object Object],Oct 15 2011 Unix Programming with Perl 2

IPC::Open3 - Pipe and Deadlock ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

IPC::Open3 - Pipe and Deadlock ,[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

IPC::Open3 - Pipe and Deadlock ,[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

IPC::Open3 - Pipe and Deadlock ,[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Size of the pipe buffer ,[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Size of the pipe buffer (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Size of the pipe buffer (3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

IPC::Open3 - Pipe and Deadlock ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

IPC::Open3 - Pipe and Deadlock ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

IPC::Open3 – Better to use temporary files ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

IPC::Open3 vs. open |- ,[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

IPC::Open3 vs. open |- (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Avoid shell invocation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Rewriting open |- using IPC::Open3 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Rewriting open -| using IPC::Open3 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

How to sleep until receiving a signal? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

How to sleep until receiving a signal? (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Use POSIX::pselect ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

The problem of pselect ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Using eval & die does not solve the problem ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

The fix – call syswrite on signal ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Summary ,[object Object],[object Object],[object Object],Oct 15 2011 Unix Programming with Perl 2

Advanced Unix Programming Techniques with Perl

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Advanced Unix Programming Techniques with Perl