Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: mcvax!cs.vu.nl!maart@uunet.uu.net (Maarten Litmaath)
Newsgroups: comp.sys.sun
Subject: Re: `stty speed` problem under 4.0 ??
Keywords: SunOS
Message-ID: <132@brazos.Rice.edu>
Date: 11 Jul 89 02:04:05 GMT
Sender: root@rice.edu
Organization: Sun-Spots
Lines: 19
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 8, Issue 71, message 4 of 18

eho@bogey.princeton.edu (Eric Y.W. Ho) writes:
\Does anyone has this problem under 4.0.1 (on Sun-3's & Sun-4's) ?
\
\	cognito-root(3)-[/]: set xyz = `stty speed`
\	stty: Operation not supported on socket [...]

The output of the `backquote sub-shell' is connected with the parent
through a pipe (read: a socket).  The `stty' command is performing calls
to ioctl(2) on stdout, which isn't a terminal in this case. The output of
stty itself is sent to STDERR.  So, to achieve what you want, you need to
redirect that very stderr into the pipe, i.e. to stdout, and redirect
stdout to your terminal:

	set xyz = "`(stty speed > /dev/tty) |& cat`"
In sh:
	xyz="`stty speed 2>&1 > /dev/tty`"
 
   "... a lap-top Cray-2 with builtin    |Maarten Litmaath @ VU Amsterdam:
cold fusion power supply"  (Colin Dente) |maart@cs.vu.nl, mcvax!botter!maart