Date: Sat, 28 Sep 2002 11:30:09 -0700 (PDT) From: =?ISO-8859-1?Q?Mikko_Ty=F6l=E4j=E4rvi?= <mbsd@pacbell.net> To: Jimmy Lantz <jimmy.lantz@lusidor.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Bourne shell redirection of STDOUT Message-ID: <20020928112417.K97357-100000@atlas.home> In-Reply-To: <5.1.0.14.0.20020928170713.00bcc758@mail.lusidor.nu>
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On Sat, 28 Sep 2002, Jimmy Lantz wrote:
> Hi,
> I wonder if anyone know a way to redirect the STDOUT directly to a variabel
> in a shellscript w/o using tempfile.
Use backticks ``.
>
> I know I can use a tempfile but I'm looking for a way to avoid using a file.
>
> in other words
>
> Does anyone have an alternative to this? I would like to be able to run
> this script read-only :
> #!/bin/sh
> DIALOG=${DIALOG=/usr/bin/dialog}
> dialog --inputbox "Hitme" 8 40 \
> 2> /tmp/tempfile
> myvar=`cat /tmp/tempfile`
Aha. You're not redirecting stdout, you want stderr, and backticks
will only get stdout (which you don't want, as it is used to present
the dialog). Here are two possible solutions:
1) Swap stdout and stderr:
myvar=`$DIALOG --inputbox "Hitme" 8 40 9>&1 1>&2 2>&9`
2) Since dialog will require a tty anyway, let it talk directly
to /dev/tty, and redirect stderr to stdout:
myvar=`$DIALOG --inputbox "Hitme" 8 40 2>&1 >/dev/tty`
$.02,
/Mikko
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