mirror of
https://git.yoctoproject.org/poky
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ff28239bbf
Add the ability to expose the lower layer of /etc when mounting overlay. This is the similar to what overlayroot script from initramfs-framework does. By default, this option is turned off to keep an old behavior intact. (From OE-Core rev: 6ad25304abefcbe538db7745e17ac213fa7d0719) Signed-off-by: Vyacheslav Yurkov <v.yurkov@precitec.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> (cherry picked from commit 791e8a8bacce5a7f31f4d7bcbfb17df2967fd258) Signed-off-by: Steve Sakoman <steve@sakoman.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
51 lines
1.2 KiB
Bash
51 lines
1.2 KiB
Bash
#!/bin/sh
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echo "PREINIT: Start"
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PATH=/sbin:/bin:/usr/sbin:/usr/bin
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mount -o remount,rw /
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mkdir -p /proc
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mkdir -p /sys
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mkdir -p /run
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mkdir -p /var/run
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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[ -z "$CONSOLE" ] && CONSOLE="/dev/console"
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BASE_OVERLAY_ETC_DIR={OVERLAYFS_ETC_MOUNT_POINT}/overlay-etc
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UPPER_DIR=$BASE_OVERLAY_ETC_DIR/upper
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WORK_DIR=$BASE_OVERLAY_ETC_DIR/work
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LOWER_DIR=$BASE_OVERLAY_ETC_DIR/lower
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mkdir -p {OVERLAYFS_ETC_MOUNT_POINT}
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if mount -n -t {OVERLAYFS_ETC_FSTYPE} \
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-o {OVERLAYFS_ETC_MOUNT_OPTIONS} \
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{OVERLAYFS_ETC_DEVICE} {OVERLAYFS_ETC_MOUNT_POINT}
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then
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mkdir -p $UPPER_DIR
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mkdir -p $WORK_DIR
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if {OVERLAYFS_ETC_EXPOSE_LOWER}; then
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mkdir -p $LOWER_DIR
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# provide read-only access to original /etc content
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mount -o bind,ro /etc $LOWER_DIR
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fi
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mount -n -t overlay \
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-o upperdir=$UPPER_DIR \
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-o lowerdir=/etc \
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-o workdir=$WORK_DIR \
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-o index=off,xino=off,redirect_dir=off,metacopy=off \
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$UPPER_DIR /etc || \
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echo "PREINIT: Mounting etc-overlay failed!"
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else
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echo "PREINIT: Mounting </data> failed!"
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fi
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echo "PREINIT: done; starting </sbin/init>"
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exec {SBIN_INIT_NAME}
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