[yocto] Problem add and removing files to filesystem

[Lorin Vandegrift]

On Fri, Jul 24, 2015 at 5:24 PM, Khem Raj <raj.khem at gmail.com> wrote:

> On 15-07-24 14:27:09, Lorin Vandegrift wrote:
> > Hi all,
> >
> > We are having problems adding extra files/removing files from the
> generated
> > file system in Yocto.  We've had success with using a do_install command
> in
> > our own bb file and using commands in the format rsync -avz test.txt
> > ${D}{sysconfdir}, however we can't write to some paths (i.e. writing to
> > root with ${D).  Additionally, we are not able to overwrite files
> generated
> > by other recipes.  We also tried using install and couldn't push our init
> > script (nstall -m 0755 test.sh ${D}${sysconfdir}/init.d).  Any advice for
> > these?  Also is there a recommended way for removing files?   We were
> able
> > to remove them by using the rm command and adding it to
> > ROOTFS_POSTPROCESS_COMMAND.
>
> You can consider few approaches
>
> 1. Move the files into packages of there own in the recipe which means
>
> PACKAGES += "foo"
> FILES_foo = "files you want to separate out"
>
> 2. Write a bbappend in your own layer if you are doing something thats
> not generic and wont benefit community, in this bbappend you can write
> do_install_append () function and do the removal and any other packaging
> related adjustments needed for that recipe
>
> 3. Write your own rootfs post processing function and hook it up into
> ROOTFS_POSTPROCESS_COMMAND variable, this will however mean that online
> package upgrades wont work out of box.
>
> If you are looking for overwriting files then consider them patching
> using patches or overlaying files using SRC_URI itself again using a
> bbappend, if its a config file and you have few tweaks you can sed/awk
> then in do_install step itself.
>
> what you are trying is violating the packaging concerns of buildsystem
> and thats why its not working as you expected.
>
> Consider components and files a component provides as basic unit of
> operation, all changes has to be done at that level for best results.
>
> -Khem
>


Hi there,

Thanks for the response. Unfortunately we tried your suggestions with no
luck. Below is the bb file for our package, do you see anything that we
might of missed? The tar ball listed below is in a subdirectory called
"files" in the same folder as the bb file.

Thanks

SUMMARY = "Extra filesystem files"
SECTION = "rootfs"
LICENSE = "CLOSED"

SRC_URI = "file://extrafiles.tar.gz"
S = "${WORKDIR}/files"

ROOTFS_POSTPROCESS_COMMAND += "set_root_passwd;"
ROOTFS_POSTPROCESS_COMMAND += "modify_filesystem;"

do_install() {
   install -m 0755 testFile.sh ${D}/home/root
   rsync -avz wpa_supplicant ${D}${sysconfdir}
   rsync -avz root ${D}${sysconfdir}
   rsync -avz network ${D}${sysconfdir}
   rsync -avz test.txt ${D}${sysconfdir}
   rsync -avz syslog.conf ${D}${sysconfdir}
   rsync -avz rules.d ${D}${sysconfdir}/udev/
   rsync -avz sys_init.service ${D}${sysconfdir}/system/
}

modify_filesystem() {
   rm ${IMAGE_ROOTFS}${sysconfdir}/wpa_supplicant.conf;
}

set_root_passwd() {
        sed 's%^root:[^:]*:%root:$1$xyz$KSp5j8kx3cPgA3/ODPZ6E.:%' \
        < ${IMAGE_ROOTFS}/etc/shadow \
        > ${IMAGE_ROOTFS}/etc/shadow.new;
        mv ${IMAGE_ROOTFS}/etc/shadow.new ${IMAGE_ROOTFS}/etc/shadow ;
}

EXTRA_IMAGE_FEATURES += "read-only-rootfs"
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