eho@bogey.princeton.edu (Eric Y.W. Ho) (06/28/89)
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 It doesn't seem matter if you're doing this on a CRT terminal (I'm using a Wyse-50) or you're doing this in suntools. I'm using csh and has this in my .login file :- stty dec set crt=24 set noglob eval `tset -sQ -m su:avt -m wy50:wy50 -m sun:sun -m :?weirdo` unset noglob set notify filec However, if you just do 'stty speed' (i.e. without the back-quote) then it is fine. Strange .... ? Did I do something wrong ? -- regards. -eric-
maart@uunet.uu.net (Maarten Litmaath) (07/11/89)
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!maartdupuy@cs.columbia.edu (07/12/89)
From: eho@bogey.princeton.edu (Eric Y.W. Ho) Newsgroups: comp.sys.sun Date: 28 Jun 89 04:54:40 GMT cognito-root(3)-[/]: set xyz = `stty speed` stty: Operation not supported on socket However, if you just do 'stty speed' (i.e. without the back-quote) then it is fine. Strange .... ? Did I do something wrong ? Try "set xyz = `/usr/5bin/stty speed`. Works for me. @alex