[yocto] Adding to inittab based on image content

[Mike Looijmans]

On 06-01-17 18:17, Rudolf J Streif wrote:
> Hi Colin,
>
> The correct way of doing this is a package postinstallation script that is run
> by the package manager after the package containing your application is
> installed on the target system.
>
> You add to your recipe:
>
> pkg_postinst_${PN}() {
> #!/bin/sh
> echo "whateveryouneed" >> ${D}/etc/inittab
> }

Problems are that if you upgrade the application on target, it'll be 
included twice, and that when you remove the application, the inittab 
entry remains. If inittab itsef gets upgraded, the entry will be gone.


>
> The build system will include this as the post install script into the package
> in the correct form for the package manager you are using e.g. RPM, DEB, IPK.
>
> This will work when the build system installs your package into the system
> root or when executed on the target.
>
> You can also distinguish the two cases:
>
> pkg_postinst_${PN}() {
> #!/bin/sh
> if [ x"$D" = "x" ] ; then
>     # shell commands for target execution
> else
>     # shell commands for build system execution
> fi
> }
>
> In the case of target execution $D is not set.
>
> Best regards,
> Rudi
>
>
> On Friday, January 6, 2017 1:39:40 PM PST colin.helliwell at ln-systems.com
> wrote:
>> Hi,
>>
>> I have a custom recipe for an application, and the app also needs an entry
>> adding to inittab. I'd like to trigger this, obviously, only when the app is
>> included in the image.
>>
>> I came across some hints at how to do this -
>> http://git.yoctoproject.org/cgit/cgit.cgi/meta-virtualization/tree/recipes-c
>> ore/sysvinit/sysvinit-inittab_2.88dsf.bbappend?h=dizzy - but the app isn't
>> in DISTRO_FEATURES. (Right or wrong.., I include it in the image with a
>> "CORE_IMAGE_EXTRA_INSTALL +=" in my image recipe).
>>
>> Any suggestions on how to make this inittab addition conditional?
>>
>> Thanks
>
>
>
>


-- 
Mike Looijmans


Kind regards,

Mike Looijmans
System Expert

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