Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Date: Fri, 30 May 2003 05:46:54 -0700 From: Dario Alcocer To: cygwin@cygwin.com Subject: Re: problem suspending "man bash" (intermittent) Message-ID: <20030530054654.A13094@ns.helixdigital.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: ; from lev.bishop@yale.edu on Thu, May 29, 2003 at 11:02:59PM -0400 On Thu, May 29, 2003 at 11:02:59PM -0400, Lev Bishop wrote: > Here follow detailed results of my experimenting. > > Send the manpage to a file: > $ man bash > mb > Use less to look at it: > $ less mb > No problems suspending/restarting. > Use a pipeline in a subshell to view it (the way "man" does it): > $ (cat mb | less) > Now we have the almost the same problem as I described in my first > message - under xterm the 1st keypress sometimes goes to less instead of > to bash, subsequently foregrounding the pipeline less doesn't redraw the > screen properly, needs a newline after all commands, etc; under > console the pipeline sometimes just dies without any error message. > > More interestingly, if I don't put the pipeline in a subshell, then the > problem changes, /and ceases to be intermittent/. > $ cat mb | less > Now the problem is the same whether in xterm or console: if I ^Z then the > pipeline suspends (both processes shown by ps with an 'S', they stop > responding to keypresses) but control doesn't return to bash, and the only > way to unwedge things is to use "kill -CONT" from another window. I've duplicated this bug. In fact, I'm unable to kill the pipeline, although in my case, I didn't try CONT first, just KILL. So, it would appear that one cannot suspend pipelines that have pending input waiting. -- Dario Alcocer -- Sr. Software Developer, Helix Digital Inc. alcocer@helixdigital.com -- http://www.helixdigital.com -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/