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Message-ID: <56B47B7F.3050204@inlv.org>
Date: Fri, 05 Feb 2016 10:37:51 +0000
From: Martijn Dekker <martijn@inlv.org>
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To: zsh-users@zsh.org
Subject: Re: Suppress tracing of "set +x"
References: <20151230104531.GA20496@linux.vnet.ibm.com> <5683F898.7010907@inlv.org> <20160205100902.GA14979@linux.vnet.ibm.com>
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Dominik Vogt schreef op 05-02-16 om 10:09:
> I want only "some command" traced, not "RC=$?".

Try this:

exec 9>&2	# reserve file descriptor for tracing
trace() {
	local cmd=$(printf '%q ' "$@")
	printf '+ %s\n' "$cmd" 2>&9
	"$@"
}

trace some command

This will only work for simple commands, not for grammatical constructs
nor for anything with a function-local scope.

(The above code should also work on bash and ksh93.)

HTH,

- M.