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Postings from April 2002
http://www.wetware.com/drieux/CS/lang/Perl/Beginners/p1_read_p2.txt On Monday, April 1, 2002, at 02:49 , Roy Peters wrote: > Hello, > > I have 2 independent perl programs p1 and p2. p1 calls p2 (using either > the > system() or `` operators, and p2 will print > out status information every 2 seconds or so. How do I set it up such > that whenever p2 prints out data, it is printed out by p1 also IN REAL > TIME? I don't think you can do it that way, but you might want to remember that 'open' will also works like popen() in 'c', et al. system is about 'execing' a sub process - and that is not always easy to deal with getting it to open a pipe back to the process that is waiting... If p1 needs to process other requests, to which this p2 process is actually supposed to be a forked child.... who needed to open a pipe back... then you have to go open up the Net:: stuff.... ciao drieux --- and for the purists - in the above text we do a old school 'c' style while loop with chomp - and , ok, I confess, the cooler perlie style chomp, <doSomething> while(<INPUT>) ;Thread Previous