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busybox:/bin/sh: can't access tty; job control turned off

2017-10-20 01:01:44| 分类： linux | 标签： |举报 |字号大中小订阅

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基于busybox的内核运行时出现如下错误：

/bin/sh: can't access tty; job control turned off

其VM运行命令如下：
qemu-system-x86_64 \
    -kernel obj/linux-x86/arch/x86_64/boot/bzImage \
    -initrd obj/initramfs-busybox-x86.cpio.gz \
    -nographic -append "console=ttyS0"

解决方案如下：在init文件中加入如下行
mknod -m 666 /dev/ttyS0 c 4 64

完整的init文件:
mount -t proc none /proc
mount -t sysfs none /sys

mknod -m 666 /dev/ttyS0 c 4 64
mknod -m 666 /dev/null c 1 3
mknod -m 666 /dev/zero c 1 5
mknod -m 666 /dev/ptmx c 5 2
mknod -m 666 /dev/tty c 5 0 # <--
mknod -m 444 /dev/random c 1 8
mknod -m 444 /dev/urandom c 1 9
chown root:tty /dev/{console,ptmx,tty}

exec sh
...

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