我在yocto版本中使用github.com/mendersoftware/meta-mender。我想使用sed编辑/etc/fstab，在我自己的层中使用bbappend文件。具体来说，meta-mender目前正在提供自己的fstab文件并用base-files_3.%.bbappend编辑它，我只想从生成的/etc/fstab中删除auto关键字。
问题是，当我在我的层中为基础文件提供自己的bbappend（我的层比meta mender具有更高的优先级）时，.bbappend，meta mender fstab似乎根本没有创建，而open embedded中的stock就是。
这是我的meta layer/recipes core/base files/base-files_3.%.bbappend：
do_install_append(){
sed -i -e 's$.*@MENDER_BOOT_PART@.*$@MENDER_BOOT_PART@ /uboot @MENDER_BOOT_PART_FSTYPE@ defaults,sync 0 0$' ${D}${sysconfdir}/fstab
sed -i -e 's$.*@MENDER_DATA_PART@.*$@MENDER_DATA_PART@ /data @MENDER_DATA_PART_FSTYPE@ defaults 0 0$' ${D}${sysconfdir}/fstab
}
如果我运行
bitbake -e base-files，然后查找do_install函数，您可以清楚地看到我的sed命令被正确地附加到meta mender/meta mender core/recipes core/base files/base-files中：do_install() {
for d in /boot /dev /bin /sbin /lib /etc /etc/default /etc/skel /lib /mnt /proc /home/root /run /usr /usr/bin /usr/share/doc/base-files-3.0.14 /usr/games /usr/include /usr/lib /usr/sbin /usr/share /usr/share/common-licenses /usr/share/dict /usr/share/info /usr/share/man /usr/share/misc /var /var/backups /var/lib /sys /var/lib/misc /var/spool /var/volatile /var/volatile/log /home /usr/src /var/local /media; do
install -m 0755 -d /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image$d
done
for d in /tmp /var/volatile/tmp; do
install -m 1777 -d /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image$d
done
for d in ; do
install -m 2775 -d /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image$d
done
for d in log tmp; do
ln -sf volatile/$d /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/var/$d
done
ln -snf ../run /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/var/run
ln -snf ../run/lock /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/var/lock
do_install_basefilesissue
rotation=`cat /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/rotation`
if [ "$rotation" != "0" ]; then
install -m 0644 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/rotation /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/rotation
fi
install -m 0644 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/fstab /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/fstab
install -m 0644 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/filesystems /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/filesystems
install -m 0644 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/usbd /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/default/usbd
install -m 0644 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/profile /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/profile
sed -i 's#ROOTHOME#/home/root#' /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/profile
install -m 0644 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/shells /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/shells
install -m 0755 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/share/dot.profile /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/skel/.profile
install -m 0755 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/share/dot.bashrc /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/skel/.bashrc
install -m 0644 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/nsswitch.conf /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/nsswitch.conf
install -m 0644 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/host.conf /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/host.conf
install -m 0644 /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/motd /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/motd
ln -sf /proc/mounts /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/mtab
install -d /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/uboot
install -d /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/data
sed -i -e 's$.*@MENDER_BOOT_PART@.*$@MENDER_BOOT_PART@ /uboot @MENDER_BOOT_PART_FSTYPE@ defaults,sync 0 0$' /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/fstab
sed -i -e 's$.*@MENDER_DATA_PART@.*$@MENDER_DATA_PART@ /data @MENDER_DATA_PART_FSTYPE@ defaults 0 0$' /home/user/Desktop/yocto/build/tmp/work/raspberrypi3-poky-linux-gnueabi/base-files/3.0.14-r89/image/etc/fstab
}
但是，my/etc/fstab看起来是这样的：
# stock fstab - you probably want to override this with a machine specific one
/dev/root / auto defaults 1 1
proc /proc proc defaults 0 0
devpts /dev/pts devpts mode=0620,gid=5 0 0
tmpfs /run tmpfs
mode=0755,nodev,nosuid,strictatime 0 0
tmpfs /var/volatile tmpfs defaults 0 0
# uncomment this if your device has a SD/MMC/Transflash slot
#/dev/mmcblk0p1 /media/card auto defaults,sync,noauto 0 0
如您所见，它完全跳过了meta-menders的/etc/fstab文件，而只是编写了一个股票文件。
最佳答案
那么，sed表达式中的.*@MENDER_BOOT_PART@.*计算结果是什么？
据我所见，您的fstab中没有任何匹配.*@MENDER_BOOT_PART@.*或.*@MENDER_DATA_PART@.*的内容。
如果我的理解是正确的，你也可以用类似于
echo "data" >> ${D}${sysconfdir}/fstab
关于linux - 自定义bitbake bbapend无法正确附加修补程序fstab文件，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/43599128/