How to display zsh is 32/64 bit?

How to display zsh is 32/64 bit?

[Daniel Lin]

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To do cross compile of 32/64 bit program on one machine.(which installed
64-bit zsh)
I use ArchLinux x86_64 as host machine.
And a arch32 chroot environment for 32-bit compiling(which installed 32-bit
zsh).

One problem is the PS1 of zsh.
It will display the same on both environment.
I'm wonder could I show different prompt inside the chroot environemnt?

If zsh's prompt variable can deal this?

Re: How to display zsh is 32/64 bit?

[Thomas Köhler]

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Hi Daniel,

Daniel Lin wrote:
> To do cross compile of 32/64 bit program on one machine.(which installed
> 64-bit zsh)
> I use ArchLinux x86_64 as host machine.
> And a arch32 chroot environment for 32-bit compiling(which installed 32-bit
> zsh).
> 
> One problem is the PS1 of zsh.
> It will display the same on both environment.
> I'm wonder could I show different prompt inside the chroot environemnt?
> 
> If zsh's prompt variable can deal this?

On Linux, you can simply do something like this:

PS1=$(file -L /proc/$$/exe | sed -e 's/.*ELF //' -e 's/-bit.*/ /')

On my 64 bit (debian derivative) system, that yields a PS1 of "64 ",
while in the 32 bit (debian) chroot, that yields a PS1 of "32 ".

Ciao,
Thomas

-- 
 Thomas Köhler       Email:       jean-luc@picard.franken.de
     <><             WWW:              http://gott-gehabt.de
                     IRC: tkoehler       Freenode: thkoehler
                     PGP public key available from Homepage!

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Re: How to display zsh is 32/64 bit?

[Daniel Lin]

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Thanks, Thomas, it works.
But, because the 'file' utility is not installed on my arch32-light
environment.
So,
I use a more stupid method:
create a symbol file (eg. /opt/arch32/etc/pacman32.conf)

if [ -f /etc/pacm32.conf ] ; then
  PS1="32 "  // in arch32
else
  PS1="64 " // in arch64
fi

2011/12/9 Thomas Köhler <jean-luc@picard.franken.de>

> Hi Daniel,
>
> Daniel Lin wrote:
> > To do cross compile of 32/64 bit program on one machine.(which installed
> > 64-bit zsh)
> > I use ArchLinux x86_64 as host machine.
> > And a arch32 chroot environment for 32-bit compiling(which installed
> 32-bit
> > zsh).
> >
> > One problem is the PS1 of zsh.
> > It will display the same on both environment.
> > I'm wonder could I show different prompt inside the chroot environemnt?
> >
> > If zsh's prompt variable can deal this?
>
> On Linux, you can simply do something like this:
>
> PS1=$(file -L /proc/$$/exe | sed -e 's/.*ELF //' -e 's/-bit.*/ /')
>
> On my 64 bit (debian derivative) system, that yields a PS1 of "64 ",
> while in the 32 bit (debian) chroot, that yields a PS1 of "32 ".
>
> Ciao,
> Thomas
>
> --
>  Thomas Köhler       Email:       jean-luc@picard.franken.de
>     <><             WWW:              http://gott-gehabt.de
>                     IRC: tkoehler       Freenode: thkoehler
>                     PGP public key available from Homepage!
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.2.3 (GNU/Linux)
>
> iD8DBQFO4cETTEYXWMJlHuYRAlEIAJ4tsF/kY8Ldtt25rQFDOuOGNAf44ACffbMf
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>

Re: How to display zsh is 32/64 bit?

[Peter Stephenson]

On Fri, 9 Dec 2011 12:34:59 +0800
Daniel Lin <dlin.tw@gmail.com> wrote:
> To do cross compile of 32/64 bit program on one machine.(which installed
> 64-bit zsh)
> I use ArchLinux x86_64 as host machine.
> And a arch32 chroot environment for 32-bit compiling(which installed 32-bit
> zsh).
> 
> One problem is the PS1 of zsh.
> It will display the same on both environment.
> I'm wonder could I show different prompt inside the chroot environemnt?
> 
> If zsh's prompt variable can deal this?

I'm a bit suprised $MACHTYPE doesn't report it, but on a 64-bit RHEL
machine at work it was reporting i686, not x86_64.  This comes from
config.guess; I note ours is a bit out of date.  I've updated to the one
from automake 1.11.1 and it now reports x86_64 on that machine.  I'll
submit the newer config.guess and config.sub (they're not actually that new,
2009-11-20 instead of 2009-06=10).

-- 
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Tel: +44 (0)1223 692070                   Cambridge Silicon Radio Limited
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Re: How to display zsh is 32/64 bit?

[Dan Nelson]

In the last episode (Dec 09), Peter Stephenson said:
> On Fri, 9 Dec 2011 12:34:59 +0800
> Daniel Lin <dlin.tw@gmail.com> wrote:
> > To do cross compile of 32/64 bit program on one machine.(which installed
> > 64-bit zsh) I use ArchLinux x86_64 as host machine.  And a arch32 chroot
> > environment for 32-bit compiling(which installed 32-bit zsh).
> > 
> > One problem is the PS1 of zsh.  It will display the same on both
> > environment.  I'm wonder could I show different prompt inside the chroot
> > environemnt?
> > 
> > If zsh's prompt variable can deal this?
> 
> I'm a bit suprised $MACHTYPE doesn't report it, but on a 64-bit RHEL
> machine at work it was reporting i686, not x86_64.  This comes from
> config.guess; I note ours is a bit out of date.  I've updated to the one
> from automake 1.11.1 and it now reports x86_64 on that machine.  I'll
> submit the newer config.guess and config.sub (they're not actually that
> new, 2009-11-20 instead of 2009-06=10).

SuSE has returned MACHTYPE=x86_64 on 64-bit machines for a long time, btw:

(root@chouse5) /root># echo $MACHTYPE
x86_64
(root@chouse5) /root># rpm -q zsh 
zsh-4.2.0-31.1
(root@chouse5) /root># ls -l /bin/zsh
-rwxr-xr-x  1 root root 559056 Jun 30  2004 /bin/zsh*
(root@chouse5) /root># cat /etc/SuSE-release 
SUSE LINUX Enterprise Server 9 (x86_64)
VERSION = 9
PATCHLEVEL = 3



-- 
	Dan Nelson
	dnelson@allantgroup.com