OT: shell and output redirection
- From: Tanel Põder <tanel.poder.003@xxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 2 Jul 2004 21:50:44 +0300
Hi!
When I redirect output from program a to program b using a shell pipe, when
is the receiving procedure executed?
E.g.:
$ program1 | program2
When program1 outputs let say 3 rows after every millisecond and pipes them
to program2, does program2 get executed on every output request? (what if
there is a separate write request for every row?).
Does program2 execute asynchronously or synchronously right after every
write request on STDIO stream?
Does program1 pass control over to program2 and return processing only after
program2 has completed it's actions?
These are the questions that bury my mind this lovely Friday evening....
Tanel.
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