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create device nodes in initrd

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Signed-off-by: Justin Cormack <justin.cormack@unikernel.com>
This commit is contained in:
Justin Cormack 2015-12-06 13:33:22 +00:00
parent 8f71683887
commit 73a8e3e1b0
2 changed files with 46 additions and 2 deletions
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2
alpine/Makefile
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@ -1,6 +1,6 @@
all: initrd.img
initrd.img: Dockerfile repositories etc/hostname etc/motd etc/inittab
initrd.img: Dockerfile mkinitrd.sh repositories etc/hostname etc/motd etc/inittab
rm -f initrd.img
docker build -t moby:test .
docker run -i -v $(PWD):/export moby:test /export/mkinitrd.sh

46
alpine/mkinitrd.sh
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@ -1,3 +1,47 @@
#!/bin/sh
find / -xdev | cpio -H newc -o > /export/initrd.img
set -e
rm -rf /tmp/*
for f in $(ls | grep -vE 'dev|sys|proc|tmp|export')
do
cp -a $f /tmp
done
mkdir -m 555 /tmp/dev /tmp/proc /tmp/sys
mkdir -m 1777 /tmp/tmp
cd /tmp/dev
mknod -m 666 null c 1 3
mknod -m 666 full c 1 7
mknod -m 666 ptmx c 5 2
mknod -m 644 random c 1 8
mknod -m 644 urandom c 1 9
mknod -m 666 zero c 1 5
mknod -m 666 tty c 5 0
mknod -m 600 ttyS0 c 4 64
# we are using sata emulation at present
mknod -m 600 sda b 8 0
mknod -m 600 sda1 b 8 1
mknod -m 600 sda2 b 8 2
mknod -m 600 sda3 b 8 3
mknod -m 600 sda4 b 8 4
mknod -m 600 sda5 b 8 5
mknod -m 600 sda6 b 8 6
mknod -m 600 sdb b 8 16
mknod -m 600 sdb1 b 8 17
mknod -m 600 sdb2 b 8 18
mknod -m 600 sdb3 b 8 19
mknod -m 600 sdb4 b 8 20
mknod -m 600 sdb5 b 8 21
mknod -m 600 sdb6 b 8 22
mkdir pty
cd /tmp
find . | cpio -H newc -o > /export/initrd.img