Add update-initrd(8).
This commit is contained in:
Jonas 'Sortie' Termansen
parent
caf632ccdd
commit
391680a468
33
Makefile
33
Makefile
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@ -25,6 +25,7 @@ sf \
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sh \
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tix \
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trianglix \
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update-initrd \
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utils \
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kernel
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@ -66,38 +67,6 @@ install: sysroot
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done; \
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fi
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cp -RTv "$(SYSROOT)" "$(INSTALL_ROOTFS)"
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@if test -n '$(INSTALL_ROOTFS_UUID)'; then \
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echo '$(INSTALL_ROOTFS_UUID)' > "$(INSTALL_ROOTFS)/etc/rootfs.uuid"; \
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SYSROOT="$(SYSROOT)" $(MAKE) create-install-rootfs-initrd; \
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else \
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echo "Warning: INSTALL_ROOTFS_UUID was not set"; \
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echo "Therefore: /etc/rootfs.uuid was not created"; \
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echo "Therefore: No initrd was created and installed"; \
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fi
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.PHONY: create-install-rootfs-initrd
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create-install-rootfs-initrd:
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ifeq ($(BUILD_IS_SORTIX),0)
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@if test -z '$(INSTALL_ROOTFS)' || test 'x$(INSTALL_ROOTFS)' = 'x/'; then \
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echo "error: Refusing to create an initrd for the local non-Sortix operating system" >&2; \
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exit 1; \
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fi
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endif
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mkdir -p "$(INSTALL_ROOTFS)/boot"
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rm -rf "$(INSTALL_ROOTFS)/boot/sortix.initrd.d"
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mkdir -p "$(INSTALL_ROOTFS)/boot/sortix.initrd.d"
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mkdir -p "$(INSTALL_ROOTFS)/boot/sortix.initrd.d/bin"
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mkdir -p "$(INSTALL_ROOTFS)/boot/sortix.initrd.d/sbin"
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test ! -e "$(INSTALL_ROOTFS)/bin/fsck.ext2" || \
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cp "$(INSTALL_ROOTFS)/bin/fsck.ext2" "$(INSTALL_ROOTFS)/boot/sortix.initrd.d/bin/fsck.ext2"
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cp "$(INSTALL_ROOTFS)/sbin/extfs" "$(INSTALL_ROOTFS)/boot/sortix.initrd.d/sbin/extfs"
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cp "$(INSTALL_ROOTFS)/sbin/init" "$(INSTALL_ROOTFS)/boot/sortix.initrd.d/sbin/init"
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mkdir -p "$(INSTALL_ROOTFS)/boot/sortix.initrd.d/etc"
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mkdir -p "$(INSTALL_ROOTFS)/boot/sortix.initrd.d/etc/init"
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cp "$(INSTALL_ROOTFS)/etc/fstab" "$(INSTALL_ROOTFS)/boot/sortix.initrd.d/etc/fstab"
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echo chain > "$(INSTALL_ROOTFS)/boot/sortix.initrd.d/etc/init/target"
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mkinitrd --format=sortix-initrd-2 "$(INSTALL_ROOTFS)/boot/sortix.initrd.d" -o "$(INSTALL_ROOTFS)/boot/sortix.initrd"
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rm -rf "$(INSTALL_ROOTFS)/boot/sortix.initrd.d"
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.PHONY: sysmerge
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sysmerge: sysroot
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@ -37,6 +37,7 @@ system, run as root:
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cd /src
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make # build new operating system in /src/sysroot
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make sysmerge # upgrade current operating system with /src/sysroot
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update-initrd # update boot initrd with new files
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.Ed
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.Pp
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The build system creates a minimal root filesystem structure in the
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@ -57,6 +58,15 @@ configuration files and other things that could cause conflicts when merging
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with an existing system. The new user-space is running on completition, though
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existing processes will be running the old programs. Likewise a reboot is needed
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to run the new kernel.
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.Pp
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The
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.Xr update-initrd 8
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program regenerates the
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.Xr initrd 7
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by embedding configuration and programs from the root filesystem. It needs to
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be run when init system files,
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.Xr fstab 5 ,
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filesystem drivers, or filesystem checkers are modified.
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.Ss Root Makefile
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The
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.Pa /src/Makefile
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@ -257,4 +267,5 @@ formal online release.
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.Sh SEE ALSO
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.Xr make 1 ,
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.Xr cross-development 7 ,
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.Xr porting-guide 7
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.Xr porting-guide 7 ,
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.Xr update-initrd 8
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@ -20,9 +20,16 @@ The initrd is in the custom format made by
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.Xr mkinitrd 8
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and can be viewed with
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.Xr initrdfs 8 .
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.Pp
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The
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.Xr update-initrd 8
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program creates a minimal initrd that locates the root filesystem and chain
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boots it as described in
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.Xr init 8 .
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.Sh SEE ALSO
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.Xr initrd 7 ,
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.Xr kernel 7 ,
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.Xr init 8 ,
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.Xr initrdfs 8 ,
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.Xr mkinitrd 8
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.Xr mkinitrd 8 ,
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.Xr update-initrd 8
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@ -0,0 +1,14 @@
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include ../build-aux/platform.mak
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include ../build-aux/dirs.mak
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all:
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.PHONY: all install clean
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clean:
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install: all
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mkdir -p $(DESTDIR)$(SBINDIR)
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install update-initrd $(DESTDIR)$(SBINDIR)
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mkdir -p $(DESTDIR)$(MANDIR)/man8
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install update-initrd.8 $(DESTDIR)$(MANDIR)/man8/update-initrd.8
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@ -0,0 +1,94 @@
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#!/bin/sh -e
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################################################################################
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#
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# Copyright(C) Jonas 'Sortie' Termansen 2015.
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the Free
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# Software Foundation, either version 3 of the License, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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# more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# update-initrd
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# Generate a mkinitrd that locates and chain boots the real root filesystem.
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#
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################################################################################
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show_version() {
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cat << EOF
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$0 (Sortix)
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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EOF
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exit 0
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}
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show_help() {
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cat << EOF
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Usage: $0 [OPTION]...
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Generate a mkinitrd that locates and chain boots the real root filesystem.
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Configuration:
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--help display this help and exit
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--version display version information and exit
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--sysroot=DIR operate on this root filesystem [/]
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EOF
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exit 0
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}
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sysroot=
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dashdash=
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previous_option=
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for argument do
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if test -n "$previous_option"; then
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eval $previous_option=\$argument
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previous_option=
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continue
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fi
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case $argument in
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*=?*) parameter=$(expr "X$argument" : '[^=]*=\(.*\)') ;;
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*=) parameter= ;;
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*) parameter=yes ;;
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esac
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case $dashdash$argument in
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--) dashdash=yes ;;
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--sysroot=*) sysroot=$parameter ;;
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--sysroot) previous_option=sysroot ;;
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--help) show_help ;;
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--version) show_version ;;
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-*) echo "$0: unrecognized option $argument" >&2
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$option_checking && exit 1 ;;
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*) echo "$0: unexpected operand $argument" >&2
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exit 1 ;;
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esac
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done
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if [ ! -e "$sysroot/etc/fstab" ]; then
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echo "$0: $sysroot/etc/fstab: Need a filesystem table to make an initrd" >&2
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exit 1
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fi
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tmp=$(mktemp -d)
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trap 'rm -rf "$tmp"' EXIT HUP INT QUIT TERM
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mkdir "$tmp/bin"
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mkdir "$tmp/sbin"
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cp "$sysroot/sbin/init" "$tmp/sbin"
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cp "$sysroot/sbin/extfs" "$tmp/sbin"
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test -f "$sysroot/sbin/fsck.ext2" &&
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cp "$sysroot/sbin/fsck.ext2" "$tmp/sbin"
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mkdir "$tmp/etc"
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cp "$sysroot/etc/fstab" "$tmp/etc/fstab"
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mkdir "$tmp/etc/init"
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echo chain > "$tmp/etc/init/target"
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mkdir -p "$sysroot/boot"
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mkinitrd --format=sortix-initrd-2 "$tmp" -o "$sysroot/boot/sortix.initrd" > /dev/null
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@ -0,0 +1,61 @@
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.Dd $Mdocdate: October 6 2015 $
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.Dt UPDATE-INITRD 8
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.Os
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.Sh NAME
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.Nm update-initrd
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.Nd generate initialization ramdisk
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.Sh SYNOPSIS
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.Nm update-initrd
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.Op Fl \-sysroot Ns "=" Ns Ar sysroot
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.Sh DESCRIPTION
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.Nm update-initrd
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generates the
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.Pa /boot/sortix.initrd
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.Xr initrd 7
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containing a minimal system that searches for the root filesystem and chain
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boots it as described in
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.Xr initrd 7
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and
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.Xr init 8 .
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It contains an init system, fsck, filesystem drivers and configuration.
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.Pp
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The produced minimal system contains copies of
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.Xr fstab 5 ,
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.Xr extfs 8 ,
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.Xr fsck.ext2 8 ,
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and
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.Xr init 8 .
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If any of those files are updated then the
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.Xr initrd 7
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should be regenerated by invoking
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.Nm .
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.Pp
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The options are as follows:
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.Bl -tag -width "12345678"
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.It Fl \-sysroot Ns "=" Ns Ar sysroot
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Rather than generating an
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.Xr initrd 7
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for the root filesystem, locate files in the
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.Ar sysroot
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directory instead and store the result as
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.Ar sysroot Ns Pa /etc/sortix.initrd .
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.El
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.Sh FILES
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.Bl -tag -width "/sbin/fsck.ext2" -compact
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.It Pa /etc/fstab
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.It Pa /sbin/extfs
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.It Pa /sbin/fsck.ext2
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.It Pa /sbin/init
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.El
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.Sh EXIT STATUS
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.Nm
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will exit 0 on success and non-zero otherwise.
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.Sh SEE ALSO
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.Xr fstab 5 ,
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.Xr initrd 7 ,
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.Xr disked 8 ,
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.Xr extfs 8 ,
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.Xr init 8 ,
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.Xr initrdfs 8 ,
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.Xr mkinitrd 8 ,
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.Xr update-grub 8
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