From: Brian Candler 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 Organization: Service de news de lacave.net Lines: 26 Message-ID: <25ff3d42fe12472e3f3c8ea44c2dbc19@ruby-forum.com> References: <09ce70f0-118a-4e4d-82f1-7d88436233ff@l39g2000yqh.googlegroups.com> NNTP-Posting-Host: bristol.highgroove.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Trace: talisker.lacave.net 1302269616 1822 65.111.164.187 (8 Apr 2011 13:33:36 GMT) X-Complaints-To: abuse@lacave.net NNTP-Posting-Date: Fri, 8 Apr 2011 13:33:36 +0000 (UTC) In-Reply-To: <09ce70f0-118a-4e4d-82f1-7d88436233ff@l39g2000yqh.googlegroups.com> X-Received-From: This message has been automatically forwarded from the ruby-talk mailing list by a gateway at comp.lang.ruby. If it is SPAM, it did not originate at comp.lang.ruby. Please report the original sender, and not us. Thanks! For more details about this gateway, please visit: http://blog.grayproductions.net/categories/the_gateway X-Mail-Count: 381198 X-Ml-Name: ruby-talk X-Rubymirror: Yes X-Ruby-Talk: <25ff3d42fe12472e3f3c8ea44c2dbc19@ruby-forum.com> Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.stben.net!talisker.lacave.net!lacave.net!not-for-mail Xref: x330-a1.tempe.blueboxinc.net comp.lang.ruby:2532 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/.