我有一个最小的 Linux 系统。
INIT是/bin/bash，只有最低限度以库/lib/，/dev/静态填充，没有运行的守护进程（无udev的，..）
当 bash 启动时，我收到以下错误：
bash: cannot set terminal process group (-1) inappropriate ioctl for device
bash: no job control in this shell
当我用 strace 启动 bash 时，我得到以下输出：
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
open("/dev/tty", O_RDWR|O_NONBLOCK) = -1 ENXIO (No such device or address)
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
....
readlink("/proc/self/fd/0", "/dev/console"..., 4095) = 12
stat("/dev/console", {st_mode=S_IFCHR|0600, st_rdev=makedev(5, 1), ...}) = 0
open("/dev/console", O_RDWR|O_NONBLOCK) = …