Running the Alpine Linux Sample

[cemalgnlts]

Hi,

I am trying to run the Alpine Linux instance from the release page: https://github.com/jart/blink/releases/tag/1.0.0

The path I followed:

$ wget https://github.com/jart/blink/releases/download/1.0.0/blink-1.0-linux-x86_64.elf.gz
$ tar axf blink-1.0-linux-x86_64.elf.gz
# ...

$ wget https://dl-cdn.alpinelinux.org/alpine/v3.17/releases/x86_64/alpine-minirootfs-3.17.2-x86_64.tar.gz
$ tar axf alpine-minirootfs-3.17.2-x86_64.tar.gz -C alpine

$ ls
alpine  alpine-minirootfs-3.17.2-x86_64.tar.gz  blink*

$ PATH='/bin:/usr/bin' PS1='$?> ' ./blink -C ./alpine bash
./blink: command not found: bash

[Zoxorer]

Maybe you can try it like this, by calling the sh command through the busybox program

$ blink -C alpine /bin/busybox sh

[cemalgnlts]

Thanks.

[NewComer00]

As far as I know, there are at least two ways to chroot into a Linux rootfs with blink. I have tried them out on my Cygwin 3.4.9-1.x86_64.

Blink with VFS feature

The new VFS feature of blink is documented in README.md since #115. Built with this feature, blink -C rootfs can correctly handle the absolute symlinks in your rootfs (typically those under the rootfs/bin/ directory when busybox is used). Also, blink will take care of the new /dev/ and /proc/ directory after your chroot-ing to the rootfs.

More info can be found here.

cd ~
git clone https://github.com/jart/blink.git

# build blink with VFS feature
cd blink
./configure --enable-vfs
make -j4
make install

cd ~
wget https://dl-cdn.alpinelinux.org/alpine/v3.19/releases/x86_64/alpine-minirootfs-3.19.0-x86_64.tar.gz
tar xzvf alpine-minirootfs-3.19.0-x86_64.tar.gz --one-top-level=alpine

blink -C alpine/ /bin/busybox sh -l

Blink without VFS feature

A more traditional way. The main idea is to compile blink statically, then copy it into your rootfs. It is quite similar to the usage of qemu-user-static.

The /proc/ directory will stay unchanged (if it exists) after your chroot-ing to the rootfs.

cd ~
git clone https://github.com/jart/blink.git

# build blink without VFS feature
cd blink
./configure --static
make -j4
make install

cd ~
wget https://dl-cdn.alpinelinux.org/alpine/v3.19/releases/x86_64/alpine-minirootfs-3.19.0-x86_64.tar.gz
tar xzvf alpine-minirootfs-3.19.0-x86_64.tar.gz --one-top-level=alpine

cp /usr/local/bin/blink alpine/bin
chroot alpine/ /bin/blink /bin/sh -l

Hope it can help!

[cemalgnlts]

Thanks.