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Re: reading and writing to child process with streams in ruby

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mpurdy wrote in post #991644:
> echo -n "username: "

You are sending just "username: " without a trailing newline.

>          line = stdout.read

Here you are reading from stdout until the end-of-file (i.e. until the 
other side terminates or closes the file). This will wait forever.

Two possible solutions:

1. Change your shell script to send data ending with a newline, then use 
'gets' in the ruby code.

2. More generally, use expect.rb in the standard library. Then you can 
wait for a particular sequence of characters, e.g. /name: /, before 
continuing.

HTH,

Brian.

-- 
Posted via http://www.ruby-forum.com/.

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reading and writing to child process with streams in ruby mpurdy <mpurdy1973usergroups@gmail.com> - 2011-04-07 20:58 -0700
  Re: reading and writing to child process with streams in ruby "Y. NOBUOKA" <nobuoka@r-definition.com> - 2011-04-08 03:03 -0500
    Re: reading and writing to child process with streams in ruby mpurdy <mpurdy1973usergroups@gmail.com> - 2011-04-08 18:44 -0700
  Re: reading and writing to child process with streams in ruby Brian Candler <b.candler@pobox.com> - 2011-04-08 08:32 -0500
    Re: reading and writing to child process with streams in ruby mpurdy <mpurdy1973usergroups@gmail.com> - 2011-04-08 18:48 -0700

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