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Tue, 10 May 2022 23:48:42 -0700 (PDT) MIME-Version: 1.0 From: Zach Riggle Date: Wed, 11 May 2022 01:48:30 -0500 Message-ID: Subject: Builtins like "exec" redirection are not printed with xtrace To: Zsh Users Content-Type: multipart/alternative; boundary="000000000000fa674c05deb6d443" X-Seq: 27753 Archived-At: X-Loop: zsh-users@zsh.org Errors-To: zsh-users-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-users-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: --000000000000fa674c05deb6d443 Content-Type: text/plain; charset="UTF-8" It seems that the following produces no output #!/bin/zsh setopt xtrace exec 1>/dev/null Is there a reason that xtrace does not show the exec line? Similarly, other commands with I/O redirection seem to not be logged in xtrace, e.g. $ cat xt #!/bin/zsh setopt xtrace head -c 8 /bin/sh | xxd > /dev/null $ zsh xt +xt:3> head -c 8 /bin/sh +xt:3> xxd Is there a way to get xtrace (or another option) to log the I/O redirection? *Zach Riggle* --000000000000fa674c05deb6d443 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
It seems that the following produces no output

=C2=A0 =C2=A0 #!/bin/zsh
=C2=A0 =C2=A0 setopt xtrace
=C2=A0 = =C2=A0 exec 1>/dev/null

Is there a reason that xtrace does not sho= w the exec line?

Similarly, other commands with=C2=A0I/O redirection seem to= not be logged in xtrace, e.g.

=C2=A0 =C2=A0 $ cat xt=C2=A0 =C2=A0 #!/bin/zsh
=C2=A0 =C2=A0 setopt xtrace
=C2=A0 =C2=A0 h= ead -c 8 /bin/sh | xxd > /dev/null

=C2=A0 =C2=A0 $ zsh xt
=C2= =A0 =C2=A0 +xt:3> head -c 8 /bin/sh
=C2=A0 =C2=A0 +xt:3> xxd

=
Is there a way to get xtrace (or another option) to log the I/O = redirection?

Zach Riggle
--000000000000fa674c05deb6d443--