From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: coreutils: Can't exec "/bin/sh": No such file or directory at
	./man/help2man
Date: Sat, 22 Jun 2013 22:22:57 +0200
Message-ID: <87d2rdgaji.fsf@gnu.org>
References: <87bo6yaxp9.fsf@karetnikov.org>
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In-Reply-To: <87bo6yaxp9.fsf@karetnikov.org> (Nikita Karetnikov's message of
	"Sat, 22 Jun 2013 20:59:14 +0400")
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To: Nikita Karetnikov <nikita@karetnikov.org>
Cc: bug-guix@gnu.org

Nikita Karetnikov <nikita@karetnikov.org> skribis:

> # ./pre-inst-env guix build -K --no-substitutes coreutils

What=E2=80=99s the output path for that?  (See "out" in
/nix/store/jyj752q3jjxj0xjgm7wh2xwhkckndab7-coreutils-8.21.drv, for
instance.)

Which Guix commit is it, and which platform?

> [...]
>
> Can't exec "/bin/sh": No such file or directory at ./man/help2man line 22=
9.
> help2man: can't get '--help' info from man/chroot.td/chroot
> make[2]: *** [man/chroot.1] Error 2

The line in question is:

    join '', map { s/ +$//; expand $_ } `$ARGV[0] $_ 2>/dev/null`

It could be that Perl=E2=80=99s backquote thing uses /bin/sh, but then we=
=E2=80=99d have
noticed it elsewhere too (on Hydra, on my laptop, etc.)

Is the daemon doing chroot builds and build users?

> Binary file man/chroot.td/chroot matches
>
> # strings chroot | grep /bin/sh
> /bin/sh
> If no command is given, run '${SHELL} -i' (default: '/bin/sh -i').
>
> Can this be fixed with 'substitute*'?

Yes, but that=E2=80=99s a different issue.  Actually, I would leave it as i=
s,
because chroot honors $SHELL:

      /* No command.  Run an interactive shell.  */
      char *shell =3D getenv ("SHELL");
      if (shell =3D=3D NULL)
        shell =3D bad_cast ("/bin/sh");

And also because in the GNU System there=E2=80=99ll be /bin/sh as a symlink=
 to
the =E2=80=9Ccurrent=E2=80=9D Bash (as done on NixOS).

WDYT?

Thanks,
Ludo=E2=80=99.