I would like to find a way to run sed scripts on files within a Yocto-generated OS from a .bbappend file. My OS has a read-only rootfs, which seems to stop any possibility of a post-installation script. Specifically, I need to make these changes to /etc/default/ssh
(as run after booting the generated OS):
sed -i 's/var\/run/etc/' /etc/default/ssh
sed -i 's/_readonly//' /etc/default/ssh
Here's my openssh_7.1p1.bbappend
which I've created in an attempt to solve these problems:
FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
SRC_URI += " \
file://ssh_host_dsa_key.pub \
file://ssh_host_rsa_key.pub \
...
"
do_install_append() {
sed -i 's/var\/run/etc/' ${D}${sysconfdir}/default/ssh
sed -i 's/_readonly//' ${D}${sysconfdir}/default/ssh
# these lines work fine
install -m 0755 ${WORKDIR}/ssh_host_dsa_key ${D}/etc/ssh
install -m 0755 ${WORKDIR}/ssh_host_dsa_key.pub ${D}/etc/ssh
...
}
FILES_${PN} += "${sysconfdir}/default/ssh"
#these lines work
FILES_${PN} += "${sysconfdir}/ssh/ssh_host_dsa_key"
FILES_${PN} += "${sysconfdir}/ssh/ssh_host_dsa_key.pub"
...
BitBake fails during the execution of do_install_append()
with this error:
sed: can't read ${TMPDIR}/work/x86-poky-linux/openssh/image/etc/default/ssh: No such file or directory
(where TMPDIR is my actual tmp directory) Obviously this file doesn't exist because the proper copy is created in a separate MULTIMACH_TARGET_SYS
directory (ie not x86-poky-linux
) by image.bbclass.
Is this sort of thing possible to do from within a .bbappend file (or some other compartmentalized way)? I have found a way to do it within a .inc file with ROOTFS_POSTPROCESS_COMMAND
within my core-image, but this method is leading to a poor organizational structure.
Maybe moving the operations to a post-installation function in your .bbappend is appropriate for your circumstance?
pkg_postinst_${PN} () {
#!/bin/sh
if [ x"$D" = "x" ]; then
sed -i 's/var\/run/etc/' /etc/default/ssh
sed -i 's/_readonly//' /etc/default/ssh
else
exit 1
fi
}
The function above will cause the sed operations to execute on first boot, rather than during the build.
在SRC_URI变量中包含您尝试sed
的文件。
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