28 lines
920 B
Bash
28 lines
920 B
Bash
#!/bin/busybox sh
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set -eu
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/bin/busybox --install -s /bin
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -t devtmpfs devtmpfs /dev
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mkdir -p /dev/pts /dev/shm /tmp /payload /run
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mount -t devpts devpts /dev/pts
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mount -t tmpfs tmpfs /tmp
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mount -t tmpfs tmpfs /dev/shm
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chmod 1777 /tmp /dev/shm
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modprobe virtio_mmio
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modprobe virtio_blk
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modprobe ext4
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mount -o ro /dev/vda /payload
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# initramfs 的 rootfs 不支持 pivot_root；先进入正常根挂载再验收嵌套沙箱。
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mkdir -p /newroot
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mount -t tmpfs tmpfs /newroot
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cp -a /bin /sbin /lib /etc /newroot/
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cp /init-stage /newroot/init-stage
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mkdir -p /newroot/proc /newroot/sys /newroot/dev /newroot/tmp /newroot/payload /newroot/run
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mount -o move /proc /newroot/proc
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mount -o move /sys /newroot/sys
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mount -o move /dev /newroot/dev
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mount -o move /tmp /newroot/tmp
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mount -o move /payload /newroot/payload
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exec /bin/busybox switch_root /newroot /bin/sh /init-stage
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