Re: Synchronization Issues? or Why do my Shell Scripts Bite me after they are Done?
Re: Synchronization Issues? or Why do my Shell Scripts Bite me after they are Done?
- Subject: Re: Synchronization Issues? or Why do my Shell Scripts Bite me after they are Done?
- From: John Hawkinson <email@hidden>
- Date: Sun, 19 Mar 2006 20:37:27 -0500
Emmanuel <email@hidden> wrote on Sun, 19 Mar 2006
at 19:45:43 +0100 in <p06002001c043561f66e0@[192.168.2.2]>:
> and logically I would expect that a sequence of instructions such as
> "PDFtk blah | rm blah" run synchronously (each instruction runs after
> the previous completes.)
This is not correct.
Perhaps you mean "PDFtk blah; rm blah"?
The pipe symbol (|) causes the two commands to execute simultaneously,
with the output of the first connected to the input of the
second. This makes no sense for "rm," which ignores standard input.
--jhawk
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