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#!/bin/sh
#
# NOTE: this expects kernel to be configured with:
# CONFIG_DEVTMPFS_MOUNT=y
# so that /dev is automounted after root fs is mounted.
#
# Otherwise following is needed too:
# mount -t devtmpfs udev /dev
# mount special file systems
mount -t proc proc /proc
mount -t sysfs sysfs /sys
mount -t tmpfs tmpfs /run
mount -t tmpfs tmpfs /tmp
mkdir /dev/pts
mount -t devpts devpts /dev/pts
if [ -x /usr/bin/busybox ]; then
echo "Boot took $(cut -d' ' -f1 /proc/uptime) seconds"
# hack for running shell so that job control is enabled, see:
# https://git.busybox.net/busybox/plain/shell/cttyhack.c
#
# without -c (controlling terminal) option,
# hangs *if* 030 caches are enabled
setsid -c cttyhack sh
else
# minimal klibc tools
echo "uptime & idle seconds:"
cat /proc/uptime
exec sh
fi
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