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Re: Why it matters to build disk images in a VM

On Sat, Sep 16, 2017 at 11:20:11AM +0200, Emmanuel Kasper wrote:
>or at least a chroot environment
>I wrote a fai script to set the root passwords of the vagrant boxes.
>There are multiple ways of doing this but I settled to use:
>echo root:vagrant | chpasswd
>now as this should happen in the FAI install chroot I initially wrote:
>$ROOTCMD echo root:vagrant | chpasswd
>where $ROOTCMD is interpolated to chroot /tmp/fai-tmp-build
>and it changed the root password of my *build* host.
>See the mistake ?

Oops... :-)

>Things before the pipe are interpreted by the shell as a single command
>construct, so /bin/echo was running inside the chroot, but chpasswd was
>running outside the chroot.
>The proper fix was of course to write:
>echo root:vagrant | $ROOTCMD chpasswd


Steve McIntyre, Cambridge, UK.                                steve@einval.com
"I can't ever sleep on planes ... call it irrational if you like, but I'm
 afraid I'll miss my stop" -- Vivek Das Mohapatra

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