990338">

Debian Bug report logs - #990338
autogen: reproducible-builds: embeds /bin/sh or /bin/bash in autoopts-config

version graph

Package: src:autogen; Maintainer for src:autogen is Andreas Metzler <ametzler@debian.org>;

Reported by: Vagrant Cascadian <vagrant@reproducible-builds.org>

Date: Sat, 26 Jun 2021 03:57:01 UTC

Severity: normal

Tags: patch

Found in version autogen/1:5.19.96-1

Fixed in version autogen/1:5.19.96-2

Done: Andreas Metzler <ametzler@debian.org>

Bug is archived. No further changes may be made.

View this report as an mbox folder, status mbox, maintainer mbox


Report forwarded to debian-bugs-dist@lists.debian.org, reproducible-bugs@lists.alioth.debian.org, Andreas Metzler <ametzler@debian.org>:
Bug#990338; Package src:autogen. (Sat, 26 Jun 2021 03:57:03 GMT) (full text, mbox, link).


Acknowledgement sent to Vagrant Cascadian <vagrant@reproducible-builds.org>:
New Bug report received and forwarded. Copy sent to reproducible-bugs@lists.alioth.debian.org, Andreas Metzler <ametzler@debian.org>. (Sat, 26 Jun 2021 03:57:03 GMT) (full text, mbox, link).


Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Vagrant Cascadian <vagrant@reproducible-builds.org>
To: submit@bugs.debian.org
Subject: autogen: reproducible-builds: embeds /bin/sh or /bin/bash in autoopts-config
Date: Fri, 25 Jun 2021 20:52:50 -0700
[Message part 1 (text/plain, inline)]
Source: autogen
Severity: normal
Tags: patch
User: reproducible-builds@lists.alioth.debian.org
Usertags: shell
X-Debbugs-Cc: reproducible-bugs@lists.alioth.debian.org

Depending on what /bin/sh symlinks to, either /bin/sh or /bin/bash is
embedded in autoopts-config:

  https://tests.reproducible-builds.org/debian/rb-pkg/experimental/amd64/diffoscope-results/autogen.html

  ./usr/bin/autoopts-config

  #!·/bin/bash
  vs.
  #!·/bin/sh

The attached patch fixes this by hard-coding CONFIG_SHELL=/bin/sh in
configure.ac.

I tried passing to configure or setting it in the environment, but both
approaches were ineffective.


Applying this patch *should* make autogen build reproducibly.


Thanks for maintaining autogen!


live well,
  vagrant
[0001-configure.ac-Hard-code-CONFIG_SHELL-as-bin-sh.patch (text/x-diff, inline)]
From 43575b74f0e64135edbcb7b6c6c5c789de87e84f Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Sat, 26 Jun 2021 03:39:15 +0000
Subject: [PATCH] configure.ac: Hard-code CONFIG_SHELL as /bin/sh.

Without hard-coding this, the build may pick /bin/sh or /bin/bash,
depending on what /bin/sh links to.

Passing CONFIG_SHELL=/bin/sh to configure, or setting it in the
environment does not appear to effective.

https://tests.reproducible-builds.org/debian/issues/unstable/captures_shell_variable_in_autofoo_script_issue.html
---
 configure.ac | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index 7171267..db0529e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -223,10 +223,7 @@ AC_CONFIG_FILES([
 
 AC_CONFIG_COMMANDS([stamp-h],
 [test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h])
-[CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
-f=`${CONFIG_SHELL} -c 'echo true | (
-    exec 2>/dev/null ; read -u0 line ; echo $line ; )'`
-test X$f = Xtrue || CONFIG_SHELL=`command -v bash`]
+CONFIG_SHELL=/bin/sh
 AC_SUBST(CONFIG_SHELL)
 AC_DEFINE_UNQUOTED(CONFIG_SHELL,$CONFIG_SHELL,
                    [Define this to a working Bourne shell])
-- 
2.32.0

[signature.asc (application/pgp-signature, inline)]

Marked as found in versions autogen/1:5.19.96-1. Request was from Andreas Metzler <ametzler@bebt.de> to control@bugs.debian.org. (Sat, 26 Jun 2021 12:30:03 GMT) (full text, mbox, link).


Information forwarded to debian-bugs-dist@lists.debian.org, Andreas Metzler <ametzler@debian.org>:
Bug#990338; Package src:autogen. (Sat, 26 Jun 2021 13:09:02 GMT) (full text, mbox, link).


Acknowledgement sent to Andreas Metzler <ametzler@bebt.de>:
Extra info received and forwarded to list. Copy sent to Andreas Metzler <ametzler@debian.org>. (Sat, 26 Jun 2021 13:09:02 GMT) (full text, mbox, link).


Message #12 received at 990338@bugs.debian.org (full text, mbox, reply):

From: Andreas Metzler <ametzler@bebt.de>
To: Vagrant Cascadian <vagrant@reproducible-builds.org>, 990338@bugs.debian.org
Subject: Re: Bug#990338: autogen: reproducible-builds: embeds /bin/sh or /bin/bash in autoopts-config
Date: Sat, 26 Jun 2021 15:05:49 +0200
On 2021-06-26 Vagrant Cascadian <vagrant@reproducible-builds.org> wrote:
> Source: autogen
> Severity: normal
> Tags: patch
> User: reproducible-builds@lists.alioth.debian.org
> Usertags: shell
> X-Debbugs-Cc: reproducible-bugs@lists.alioth.debian.org

> Depending on what /bin/sh symlinks to, either /bin/sh or /bin/bash is
> embedded in autoopts-config:

>   https://tests.reproducible-builds.org/debian/rb-pkg/experimental/amd64/diffoscope-results/autogen.html

>   ./usr/bin/autoopts-config

>   #!·/bin/bash
>   vs.
>   #!·/bin/sh

> The attached patch fixes this by hard-coding CONFIG_SHELL=/bin/sh in
> configure.ac.

> I tried passing to configure or setting it in the environment, but both
> approaches were ineffective.

> Applying this patch *should* make autogen build reproducibly.
[...]
> -[CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
> -f=`${CONFIG_SHELL} -c 'echo true | (
> -    exec 2>/dev/null ; read -u0 line ; echo $line ; )'`
> -test X$f = Xtrue || CONFIG_SHELL=`command -v bash`]
> +CONFIG_SHELL=/bin/sh
>  AC_SUBST(CONFIG_SHELL)
>  AC_DEFINE_UNQUOTED(CONFIG_SHELL,$CONFIG_SHELL,
>                     [Define this to a working Bourne shell])
[...]

Hello Vagrant,

thanks for the report. The ./configure test checks whether $CONFIG_SHELL
supports (non-posix) read -u and uses bash otherwise. This test succeeds
if /bin/sh happens to point to bash. However autogen shell code seems to
actually makes use of the read -u option and therefore an autogen binary
with the patch or built on a system with /bin/sh=bash will likely be
broken, not properly working on system with /bin/sh=dash.
So I think the proper fix (for the very real bug) would be to pass
CONFIG_SHELL=/bin/bash to configure.

cu Andreas
-- 
`What a good friend you are to him, Dr. Maturin. His other friends are
so grateful to you.'
`I sew his ears on from time to time, sure'



Information forwarded to debian-bugs-dist@lists.debian.org, Andreas Metzler <ametzler@debian.org>:
Bug#990338; Package src:autogen. (Sat, 26 Jun 2021 17:00:03 GMT) (full text, mbox, link).


Acknowledgement sent to Vagrant Cascadian <vagrant@reproducible-builds.org>:
Extra info received and forwarded to list. Copy sent to Andreas Metzler <ametzler@debian.org>. (Sat, 26 Jun 2021 17:00:03 GMT) (full text, mbox, link).


Message #17 received at 990338@bugs.debian.org (full text, mbox, reply):

From: Vagrant Cascadian <vagrant@reproducible-builds.org>
To: Andreas Metzler <ametzler@bebt.de>, 990338@bugs.debian.org
Subject: Re: Bug#990338: autogen: reproducible-builds: embeds /bin/sh or /bin/bash in autoopts-config
Date: Sat, 26 Jun 2021 09:57:04 -0700
[Message part 1 (text/plain, inline)]
On 2021-06-26, Andreas Metzler wrote:
> On 2021-06-26 Vagrant Cascadian <vagrant@reproducible-builds.org> wrote:
>> Depending on what /bin/sh symlinks to, either /bin/sh or /bin/bash is
>> embedded in autoopts-config:
>
>>   https://tests.reproducible-builds.org/debian/rb-pkg/experimental/amd64/diffoscope-results/autogen.html
>
>>   ./usr/bin/autoopts-config
>
>>   #!·/bin/bash
>>   vs.
>>   #!·/bin/sh
>
>> The attached patch fixes this by hard-coding CONFIG_SHELL=/bin/sh in
>> configure.ac.
>
>> I tried passing to configure or setting it in the environment, but both
>> approaches were ineffective.
>
>> Applying this patch *should* make autogen build reproducibly.
> [...]
>> -[CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
>> -f=`${CONFIG_SHELL} -c 'echo true | (
>> -    exec 2>/dev/null ; read -u0 line ; echo $line ; )'`
>> -test X$f = Xtrue || CONFIG_SHELL=`command -v bash`]
>> +CONFIG_SHELL=/bin/sh
>>  AC_SUBST(CONFIG_SHELL)
>>  AC_DEFINE_UNQUOTED(CONFIG_SHELL,$CONFIG_SHELL,
>>                     [Define this to a working Bourne shell])
> [...]
>
> Hello Vagrant,
>
> thanks for the report. The ./configure test checks whether $CONFIG_SHELL
> supports (non-posix) read -u and uses bash otherwise. This test succeeds
> if /bin/sh happens to point to bash. However autogen shell code seems to
> actually makes use of the read -u option and therefore an autogen binary
> with the patch or built on a system with /bin/sh=bash will likely be
> broken, not properly working on system with /bin/sh=dash.
> So I think the proper fix (for the very real bug) would be to pass
> CONFIG_SHELL=/bin/bash to configure.

I believe I did at one point try that, but will test again to be sure.


live well,
  vagrant
[signature.asc (application/pgp-signature, inline)]

Information forwarded to debian-bugs-dist@lists.debian.org, Andreas Metzler <ametzler@debian.org>:
Bug#990338; Package src:autogen. (Sat, 26 Jun 2021 18:06:02 GMT) (full text, mbox, link).


Acknowledgement sent to Bruce Korb <bruce.korb@gmail.com>:
Extra info received and forwarded to list. Copy sent to Andreas Metzler <ametzler@debian.org>. (Sat, 26 Jun 2021 18:06:03 GMT) (full text, mbox, link).


Message #22 received at 990338@bugs.debian.org (full text, mbox, activities from being done in a subshell. If you do stuff in a subshell, > the information stashed in variables is invisible. I think the "-u" > option is a couple of decades old now. I wonder what the POSIX point of > resistance is on that feature. > > I believe Andreas' solution should be correct: force CONFIG_SHELL to a > shell that supports "read -u". > > It is possible the dependence on "-u" can be removed, if my scan over > the code is correct. It looks like the templates I use use that option > only to avoid an otherwise unnecessary fork() call. If so, the loops > involved can be fixed up with a "done <&4" at the end and removing the > "-u" option. > > There's still the issue of "mk-unlocked-io.sh" tho: > > > do_stdio() { > >     while read -u4 line > >     do > >         [[ "$line" =~ $extern_line ]] || continue > >         [[ "$line" =~ $close_decl  ]] || { > >             read -u4 args || die "no close for $line" > >             line+="$args" > >         } > > > >         ct=$(sed 's/.*( *//;s/ *).*//' <<<"$line") > >         if (( ${#ct} > 0 )) && [[ "$ct" != "void" ]] > >         then > >             ct=$(sed 's/[^,]//g' <<<"$ct") > >             ct=$(( (${#ct} * 3) + 2 )) > >             args='_w,_x,_y,_z' > >             args=${args:$(( ${#args} - ct )):$ct} > >         else > >             args='' ct=0 > >         fi > >         do_func "$line" "$args" > >     done > > } > That may be trickier, but I am uncertain of its use anymore. :) (I > stopped being a programmer 6 years ago now. I'm retired. It's been a > long time.) I think that is an AutoGen developer only script for > fabricating an "autoopts/unlocked-io.h" header. It should not be > relevant to reproducible builds. But I cannot be certain anymore. > > Cheers - Bruce > > > &In-Reply-To=<56d348a1-d41d-ab66-c788-6e25682d17f2@gmail.com>">reply):

From: Bruce Korb <bruce.korb@gmail.com>
To: Andreas Metzler <ametzler@bebt.de>, 990338@bugs.debian.org, Vagrant Cascadian <vagrant@reproducible-builds.org>
Subject: Re: Bug#990338: autogen: reproducible-builds: embeds /bin/sh or /bin/bash in autoopts-config
Date: Sat, 26 Jun 2021 11:03:54 -0700
On 6/26/21 6:05 AM, Andreas Metzler wrote:
> thanks for the report. The ./configure test checks whether $CONFIG_SHELL
> supports (non-posix) read -u and uses bash otherwise. This test succeeds

"read -u4" avoids redirecting stdin and avoiding that keeps the 
activities from being done in a subshell. If you do stuff in a subshell, 
the information stashed in variables is invisible. I think the "-u" 
option is a couple of decades old now. I wonder what the POSIX point of 
resistance is on that feature.

I believe Andreas' solution should be correct: force CONFIG_SHELL to a 
shell that supports "read -u".

It is possible the dependence on "-u" can be removed, if my scan over 
the code is correct. It looks like the templates I use use that option 
only to avoid an otherwise unnecessary fork() call. If so, the loops 
involved can be fixed up with a "done <&4" at the end and removing the 
"-u" option.

There's still the issue of "mk-unlocked-io.sh" tho:

> do_stdio() {
>     while read -u4 line
>     do
>         [[ "$line" =~ $extern_line ]] || continue
>         [[ "$line" =~ $close_decl  ]] || {
>             read -u4 args || die "no close for $line"
>             line+="$args"
>         }
>
>         ct=$(sed 's/.*( *//;s/ *).*//' <<<"$line")
>         if (( ${#ct} > 0 )) && [[ "$ct" != "void" ]]
>         then
>             ct=$(sed 's/[^,]//g' <<<"$ct")
>             ct=$(( (${#ct} * 3) + 2 ))
>             args='_w,_x,_y,_z'
>             args=${args:$(( ${#args} - ct )):$ct}
>         else
>             args='' ct=0
>         fi
>         do_func "$line" "$args"
>     done
> }
That may be trickier, but I am uncertain of its use anymore. :) (I 
stopped being a programmer 6 years ago now. I'm retired. It's been a 
long time.) I think that is an AutoGen developer only script for 
fabricating an "autoopts/unlocked-io.h" header. It should not be 
relevant to reproducible builds. But I cannot be certain anymore.

Cheers - Bruce




Information forwarded to debian-bugs-dist@lists.debian.org, Andreas Metzler <ametzler@debian.org>:
Bug#990338; Package src:autogen. (Sun, 27 Jun 2021 11:57:02 GMT) (full text, mbox, link).


Acknowledgement sent to Andreas Metzler <ametzler@bebt.de>:
Extra info received and forwarded to list. Copy sent to Andreas Metzler <ametzler@debian.org>. (Sun, 27 Jun 2021 11:57:02 GMT) (full text, mbox, link).


Message #27 received at 990338@bugs.debian.org (full text, mbox, --with-libxml2-cflags="$(shell $(DEB_HOST_GNU_TYPE)-pkg-config --cflags libxml-2.0)" \ > - GREP=/bin/grep POSIX_SHELL=/bin/sh SHELL=/bin/sh > + GREP=/bin/grep POSIX_SHELL=/bin/sh SHELL=/bin/sh \ > + CONFIG_SHELL=/bin/bash > > override_dh_auto_build: > dh_auto_build --verbose > > cu Andreas > > &In-Reply-To=">reply):

From: Andreas Metzler <ametzler@bebt.de>
To: Vagrant Cascadian <vagrant@reproducible-builds.org>, 990338@bugs.debian.org
Subject: Re: Bug#990338: autogen: reproducible-builds: embeds /bin/sh or /bin/bash in autoopts-config
Date: Sun, 27 Jun 2021 13:54:13 +0200
On 2021-06-26 Vagrant Cascadian <vagrant@reproducible-builds.org> wrote:
> On 2021-06-26, Andreas Metzler wrote:
[...]
>> So I think the proper fix (for the very real bug) would be to pass
>> CONFIG_SHELL=/bin/bash to configure.

> I believe I did at one point try that, but will test again to be sure.

diffomatic seems to be happy with

diff --git a/debian/rules b/debian/rules
index 2204e82..8f298af 100755
--- a/debian/rules
+++ b/debian/rules
@@ -21,7 +21,8 @@ override_dh_auto_configure:
                --enable-timeout=78 \
                --with-libxml2-libs="$(shell $(DEB_HOST_GNU_TYPE)-pkg-config --libs libxml-2.0)" \
                --with-libxml2-cflags="$(shell $(DEB_HOST_GNU_TYPE)-pkg-config --cflags libxml-2.0)" \
-               GREP=/bin/grep POSIX_SHELL=/bin/sh SHELL=/bin/sh
+               GREP=/bin/grep POSIX_SHELL=/bin/sh SHELL=/bin/sh \
+               CONFIG_SHELL=/bin/bash

 override_dh_auto_build:
        dh_auto_build --verbose

cu Andreas



Reply sent to Andreas Metzler <ametzler@debian.org>:
You have taken responsibility. (Sun, 04 Jul 2021 16:51:03 GMT) (full text, mbox, link).


Notification sent to Vagrant Cascadian <vagrant@reproducible-builds.org>:
Bug acknowledged by developer. (Sun, 04 Jul 2021 16:51:03 GMT) (full text, mbox, link).


Message #32 received at 990338-close@bugs.debian.org (full text, mbox, * [lintian] Use v4 watchfile. > * Upgrade to debhelper v13. > Checksums-Sha1: > 8c47328f25ea4477d5de55448ba494088e49805e 2400 autogen_5.19.96-2.dsc > 429b2e1a7610dfe9f32a4903705fbfd4584e9586 21760 autogen_5.19.96-2.debian.tar.xz > Checksums-Sha256: > ddac1b4f6a4c4f111883c863c80afa9b5e33dddc1344f277865de174f636a333 2400 autogen_5.19.96-2.dsc > d3d7b47ea1951125b577420cd7df65954041034768f5210fae2d8179c6394ae5 21760 autogen_5.19.96-2.debian.tar.xz > Files: > a7bb7a64ec2701f3c6393446df4c7a79 2400 devel optional autogen_5.19.96-2.dsc > 566babc6bbfb502ca7ed113d9a992638 21760 devel optional autogen_5.19.96-2.debian.tar.xz > > -----BEGIN PGP SIGNATURE----- > > iQIzBAEBCgAdFiEE0uCSA5741Jbt9PpepU8BhUOCFIQFAmDh4y8ACgkQpU8BhUOC > FIT4Xg//bWlTGCdEknmmJO6wbVpSvutCeODo/ziIx1w1eSNeIpdBvXvG+idNoAcy > i1fgq/mv98uStGhuZb8nRX7bvGNyj69GFeGQn6MXwGlbu5RJT4N2XQD8Fzqe3wNX > V3dR6dOhLppNiEas5grtKneQ8La221uB+lFT8V/DIFFDqIwokuBN9QHd1L9+fG40 > UyABun4HmmfX7Wvgd58+X02P/TsOzTHRUkr0rySIE10SBg4uaSPWre98lrNv3u2w &subject=Re: Bug#990338: fixed in autogen 1:5.19.96-2&References=">reply):

From: Debian FTP Masters <ftpmaster@ftp-master.debian.org>
To: 990338-close@bugs.debian.org
Subject: Bug#990338: fixed in autogen 1:5.19.96-2
Date: Sun, 04 Jul 2021 16:48:26 +0000
Source: autogen
Source-Version: 1:5.19.96-2
Done: Andreas Metzler <ametzler@debian.org>

We believe that the bug you reported is fixed in the latest version of
autogen, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 990338@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Andreas Metzler <ametzler@debian.org> (supplier of updated autogen package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 1.8
Date: Sun, 04 Jul 2021 14:57:43 +0200
Source: autogen
Architecture: source
Version: 1:5.19.96-2
Distribution: experimental
Urgency: medium
Maintainer: Andreas Metzler <ametzler@debian.org>
Changed-By: Andreas Metzler <ametzler@debian.org>
Closes: 990338
Changes:
 autogen (1:5.19.96-2) experimental; urgency=medium
 .
   * Build with CONFIG_SHELL=/bin/bash to make sure the shell supports
     "read -u". Closes: #990338
   * [lintian] Use v4 watchfile.
   * Upgrade to debhelper v13.
Checksums-Sha1: 
 8c47328f25ea4477d5de55448ba494088e49805e 2400 autogen_5.19.96-2.dsc
 429b2e1a7610dfe9f32a4903705fbfd4584e9586 21760 autogen_5.19.96-2.debian.tar.xz
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Bug archived. Request was from Debbugs Internal Request <owner@bugs.debian.org> to internal_control@bugs.debian.org. (Mon, 02 Aug 2021 07:25:43 GMT) (full text, mbox, link).


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