1 #!/bin/bash 2 # The following is a synthesis of info in: 3 # 4 # http://vmsplice.net/~stefan/stefanha-kernel-recipes-2015.pdf 5 # http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/README 6 # 7 KBASE=../../linux 8 #APPEND="console=ttyS0" 9 10 function die { 11 echo "$*" 12 exit 1 13 } 14 15 pushd .. 16 make || die "failed to make libcap tree" 17 popd 18 19 # Assumes desired make *config (eg. make defconfig) is already done. 20 pushd $KBASE 21 pwd 22 make V=1 all || die "failed to build kernel: $0" 23 popd 24 25 HERE=$(/bin/pwd) 26 27 cat > fs.conf <<EOF 28 file /init test-init.sh 0755 0 0 29 dir /etc 0755 0 0 30 file /etc/passwd test-passwd 0444 0 0 31 dir /lib 0755 0 0 32 dir /proc 0755 0 0 33 dir /dev 0755 0 0 34 dir /sys 0755 0 0 35 dir /sbin 0755 0 0 36 file /sbin/busybox /usr/sbin/busybox 0755 0 0 37 dir /bin 0755 0 0 38 file /bin/myprompt test-prompt.sh 0755 0 0 39 file /bin/bash test-bash.sh 0755 0 0 40 dir /usr 0755 0 0 41 dir /usr/bin 0755 0 0 42 dir /root 0755 0 0 43 file /root/quicktest.sh $HERE/../progs/quicktest.sh 0755 0 0 44 file /root/setcap $HERE/../progs/setcap 0755 0 0 45 file /root/getcap $HERE/../progs/getcap 0755 0 0 46 file /root/capsh $HERE/../progs/capsh 0755 0 0 47 file /root/getpcaps $HERE/../progs/getpcaps 0755 0 0 48 EOF 49 50 COMMANDS="ls ln cp id pwd mkdir rmdir cat rm sh mount umount chmod less" 51 for f in $COMMANDS; do 52 echo slink /bin/$f /sbin/busybox 0755 0 0 >> fs.conf 53 done 54 55 UCOMMANDS="id cut" 56 for f in $UCOMMANDS; do 57 echo slink /usr/bin/$f /sbin/busybox 0755 0 0 >> fs.conf 58 done 59 60 $KBASE/usr/gen_init_cpio fs.conf | gzip -9 > initramfs.img 61 62 KERNEL=$KBASE/arch/x86_64/boot/bzImage 63 64 qemu-system-$(uname -m) -m 1024 \ 65 -kernel $KERNEL \ 66 -initrd initramfs.img \ 67 -append "$APPEND" 68
