On 18/06/2014 05:44 +0400, Ken Brown wrote: > On 6/17/2014 2:22 PM, Filipp Gunbin wrote: >> Here are the steps to reproduce. >> >> M-& echo "sleep 1; ps &" > /tmp/1.sh >> >> Then M-& /tmp/1.sh (few times). >> >> On my machine, sometimes it gives the output in the *Async Shell >> Command* buffer, sometimes not. Without "sleep 1" the output is >> displayed almost always. >> >> M-! /tmp/1.sh displays the output always. > > I'm seeing something different, but I'm running a pretest of > emacs-24.4 rather than emacs-24.3. I find that the output is never > displayed, with or without "sleep 1". But if I remove the "&" from > 1.sh, then the output is always displayed (again, with or without > "sleep 1"). Could you try installing the test release emacs-24.3.90-1 > and see if you get the same results I'm getting?
I've tried on bzr emacs-24.4.50.1 and what I get is exactly the same as on emacs-24.3. > I don't know if there's a bug here or not. If there is, it's not > specific to Cygwin; I get the same behavior on Fedora 20. > > Do you have a use case for wanting to call asynchronously a command > that's already running asynchronously (because of the "&")? Yes, I usually call asynchronously various startup scripts (Tomcat, ActiveMQ and other). They usually produce some output and start java in background with &. It works from the terminal, but not from emacs. Actually, some time ago it worked from emacs too (I didn't work for some months, so unfortunately I can't tell exactly when it started). When I call such a script (catalina.sh, for example), its output is displayed in *Asynchronous Shell Command*, but the program starting from it with & (java usually) is not started (or started and killed immediately). I supposed that maybe it's killed when the parent process finishes. From looking at lisp code of async-shell-command I can't see anything which differs from shell-command in this way. I tried to narrow the problem and got the case I've posted here initially, but now I think those could be different problems. Anyway, thanks for looking at this. Filipp -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
