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feat: mount root as tmpfs instead of rootfs #37

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merged 1 commit into from
Oct 30, 2024
Merged

feat: mount root as tmpfs instead of rootfs #37

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18 changes: 16 additions & 2 deletions pkgs/linux-vm.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -56,10 +56,12 @@ let
"/etc/init.d/rcS".copy = writeScript "script" ''
#!/bin/sh

mkdir -p -- /dev /proc /sys
mkdir -p -- /dev /proc /sys /tmp
mount -t devtmpfs none /dev
mount -t proc procfs /proc
mount -t sysfs sysfs /sys/
mount -t cgroup2 none /sys/fs/cgroup
mount -t tmpfs none /tmp

ip link set dev eth0 up
udhcpc -A 0 -b -R
Expand All @@ -76,8 +78,20 @@ let
CONFIG_UDHCPC_DEFAULT_SCRIPT "/default.script"
'';
};
"/init".copy = writeScript "init" ''
#!/bin/sh

# mount new root as tmpfs
mkdir /.newroot
mount -t tmpfs none /.newroot
cd /.newroot

"/init".target = "/bin/init";
# move all files to new root
cp /init .
mv --no-clobber --target-directory=/.newroot /.* /*

exec bin/switch_root . "/bin/init" "$@"
'';
} // extraRootfsFiles;


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