From: Ray Andrews <rayandrews@eastlink.ca>
To: Zsh Users <zsh-users@zsh.org>
Subject: capturing stderr to variable.
Date: Fri, 13 Nov 2015 20:18:00 -0800 [thread overview]
Message-ID: <5646B5F8.3090702@eastlink.ca> (raw)
Gentlemen:
'highlight' seems to have no return value. If you feed it a file who's
type it does not recognize, it sends a message to stderr. To create a
test for that, I'm doing this:
$ highlight $filename 2> /tmp/highlight_err
[ -s "/tmp/highlight_err" ] &&
echo="Highlighting is active, but the file is not recognized."
rm /tmp/highlight_err > /dev/null
... which is clumsy. Researching it, I find that there's no simple way
to redirect stderr to a variable, or to some other way of capturing the
error condition. Suggestions involve things like:
... 2>&4 1>&3; } 2>&1 )
... which I'd not use anyway for clarity's sake. Any suggestions? I
was wondering, since redirection and piping are (I believe) at about the
same level of parsing, one might suppose that " ... 2| " would be
legal. That is to say that we could sent stderr to a command as well as
to a file.
next reply other threads:[~2015-11-14 4:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-14 4:18 Ray Andrews [this message]
2015-11-14 6:56 ` Mikael Magnusson
2015-11-14 8:01 ` Bart Schaefer
2015-11-14 17:20 ` Ray Andrews
2015-11-14 18:59 ` Ray Andrews
2015-11-14 19:02 ` Bart Schaefer
2015-11-14 21:19 ` Ray Andrews
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