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Groups > comp.lang.ruby > #2532
| From | Brian Candler <b.candler@pobox.com> |
|---|---|
| Newsgroups | comp.lang.ruby |
| Subject | Re: reading and writing to child process with streams in ruby |
| Date | Fri, 8 Apr 2011 08:32:48 -0500 |
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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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