forked from DGNum/liminix
feat(recovery): implement failsafe boot
for TFTP or anything, really. Signed-off-by: Raito Bezarius <masterancpp@gmail.com>
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parent
bc1f54e701
commit
95850a44c2
2 changed files with 33 additions and 2 deletions
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@ -41,17 +41,38 @@ in
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system.outputs = {
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initramfs =
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let inherit (pkgs.pkgsBuildBuild) gen_init_cpio;
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let
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inherit (pkgs.pkgsBuildBuild) gen_init_cpio cpio writeScript;
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inherit (pkgs) busybox;
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failsafe-init = writeScript "init" ''
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#!/bin/sh
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exec >/dev/console
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echo Running in initramfs
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PATH=${busybox}/bin:$PATH
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export PATH
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mount -t proc none /proc
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mount -t sysfs none /sys
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${busybox}/bin/sh
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'';
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refs = pkgs.writeReferencesToFile busybox;
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in runCommand "initramfs.cpio" {} ''
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cat << SPECIALS | ${gen_init_cpio}/bin/gen_init_cpio /dev/stdin > $out
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cat << SPECIALS | ${gen_init_cpio}/bin/gen_init_cpio /dev/stdin > out
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dir /proc 0755 0 0
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dir /dev 0755 0 0
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nod /dev/console 0600 0 0 c 5 1
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dir /target 0755 0 0
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dir /target/persist 0755 0 0
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dir /target/nix 0755 0 0
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dir /nix 0755 0 0
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dir /nix/store 0755 0 0
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dir /bin 0755 0 0
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file /bin/sh ${busybox}/bin/sh 0755 0 0
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file /init ${pkgs.preinit}/bin/preinit 0755 0 0
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file /failsafe-init ${failsafe-init} 0755 0 0
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SPECIALS
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find $(cat ${refs}) | ${cpio}/bin/cpio -H newc -o -A -v -O out
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mv out $out
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'';
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systemConfiguration =
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pkgs.systemconfig config.filesystem.contents;
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@ -98,6 +98,7 @@ int main(int argc, char *argv[], char *envp[])
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AVER(mount(opts.device, "/target/persist", opts.fstype, 0, opts.mount_opts));
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} else {
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if(mount(opts.device, "/target/persist", opts.fstype, 0, opts.mount_opts) < 0) {
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ERR("failed to mount primary device, mount the alternative device\n");
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AVER(mount(opts.altdevice, "/target/persist", opts.fstype, 0, opts.mount_opts));
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}
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}
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@ -118,5 +119,14 @@ int main(int argc, char *argv[], char *envp[])
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AVER(execve("/persist/init", argv, envp));
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}
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ERR("failed to mount the rootfs\n");
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ERR("final stand using the failsafe initialization method\n");
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ERR("the boot process is manual from now on\n");
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argv[0] = "init";
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argv[1] = NULL;
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AVER(execve("/failsafe-init", argv, envp));
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die();
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}
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