At which point during the first boot are tasks in pkg_postinst_ontarget performed?

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I'm designing a device which would need to perform a number of setup activities at first boot and I'm trying to figure out the best way to do it. One of the tools at my disposal seems to be fantastically incompletely documented pkg_postinst_ontarget.

One of the activities I need to perform depends on an SD card being successfully mounted. Would pkg_postinst_ontarget get executed after all fstab mounting activities have completed?

boot bitbake yocto
1 Answers

The yocto build places the post-installation scripts in /etc/ipk-postinsts if you are using ipk packages. Then, those scripts are typically run by systemd on target: the run-postinsts.service unit runs /usr/sbin/run-postinsts which runs and deletes all the scripts stored in /etc/ipk-postinsts. Hence, the scripts are run once at the first startup but disappear after they have been executed.

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