This repo contains software to build linux from scratch and package it into rpm files.
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#-----------------------------------------------------------------------------
Summary: mkinitramfs creates images for use as initial ramdisk (initrd) images.
Name: mkinitramfs
Version: 9.1
Release: 1
License: Any
URL: www.linuxfromscratch.org/blfs
Group: LFS/Base
Requires: filesystem
Requires: cpio
%description
The only purpose of an initramfs is to mount the root filesystem.
The initramfs is a complete set of directories that you would find on a normal
root filesystem. It is bundled into a single cpio archive and compressed
with one of several compression algorithms.
At boot time, the boot loader loads the kernel and the initramfs image into
memory and starts the kernel. The kernel checks for the presence of the
initramfs and, if found, mounts it as / and runs /init. The init program is
typically a shell script. Note that the boot process takes longer, possibly
significantly longer, if an initramfs is used.
For most distributions, kernel modules are the biggest reason to have an
initramfs. In a general distribution, there are many unknowns such as
file system types and disk layouts. In a way, this is the opposite of LFS
where the system capabilities and layout are known and a custom kernel is
normally built. In this situation, an initramfs is rarely needed.
There are only four primary reasons to have an initramfs in the
LFS environment: loading the rootfs from a network, loading it from an
LVM logical volume, having an encrypted rootfs where a password is required,
or for the convenience of specifying the rootfs as a LABEL or UUID.
Anything else usually means that the kernel was not configured properly.
#-----------------------------------------------------------------------------
%prep
%build
%install
#-----------------------------------------------------------------------------
install -vdm 755 %{buildroot}/sbin
cat > %{buildroot}/sbin/mkinitramfs <<- "EOF"
#!/bin/bash
# This file based in part on the mkinitramfs script for the LFS LiveCD
# written by Alexander E. Patrakov and Jeremy Huntwork.
# set -o errexit # exit if error...insurance ;)
# set -o nounset # exit if variable not initalized
# set +h # disable hashall
copy() {
local file
if [ "$2" == "lib" ]; then
file=$(PATH=/lib:/usr/lib type -p $1)
else
file=$(type -p $1)
fi
if [ -n $file ] ; then
cp $file $WDIR/$2
else
echo "Missing required file: $1 for directory $2"
rm -rf $WDIR
exit 1
fi
}
if [ -z $1 ] ; then
INITRAMFS_FILE=initrd.img-no-kmods
else
KERNEL_VERSION=$1
INITRAMFS_FILE=initrd.img-$KERNEL_VERSION
fi
if [ -n "$KERNEL_VERSION" ] && [ ! -d "/lib/modules/$1" ] ; then
echo "No modules directory named $1"
exit 1
fi
printf "Creating $INITRAMFS_FILE... "
binfiles="sh cat cp dd killall ls mkdir mknod mount "
binfiles="$binfiles umount sed sleep ln rm uname"
binfiles="$binfiles readlink basename"
#
# Systemd installs udevadm in /bin. Other udev implementations have it in /sbin
if [ -x /bin/udevadm ] ; then binfiles="$binfiles udevadm"; fi
sbinfiles="modprobe blkid switch_root"
#
#Optional files and locations
for f in mdadm mdmon udevd udevadm; do
if [ -x /sbin/$f ] ; then sbinfiles="$sbinfiles $f"; fi
done
unsorted=$(mktemp /tmp/unsorted.XXXXXXXXXX)
DATADIR=/usr/share/mkinitramfs
INITIN=init.in
#
# Create a temporary working directory
WDIR=$(mktemp -d /tmp/initrd-work.XXXXXXXXXX)
#
# Create base directory structure
mkdir -p $WDIR/{bin,dev,lib/firmware,run,sbin,sys,proc,usr}
mkdir -p $WDIR/etc/{modprobe.d,udev/rules.d}
touch $WDIR/etc/modprobe.d/modprobe.conf
ln -s lib $WDIR/lib64
ln -s ../bin $WDIR/usr/bin
#
# Create necessary device nodes
mknod -m 640 $WDIR/dev/console c 5 1
mknod -m 664 $WDIR/dev/null c 1 3
#
# Install the udev configuration files
if [ -f /etc/udev/udev.conf ]; then cp /etc/udev/udev.conf $WDIR/etc/udev/udev.conf; fi
for file in $(find /etc/udev/rules.d/ -type f) ; do
cp $file $WDIR/etc/udev/rules.d
done
#
# Install any firmware present
cp -a /lib/firmware $WDIR/lib
#
# Copy the RAID configuration file if present
if [ -f /etc/mdadm.conf ]; then cp /etc/mdadm.conf $WDIR/etc; fi
#
# Install the init file
install -m0755 $DATADIR/$INITIN $WDIR/init
if [ -n "$KERNEL_VERSION" ] ; then
if [ -x /bin/kmod ] ; then
binfiles="$binfiles kmod"
else
binfiles="$binfiles lsmod"
sbinfiles="$sbinfiles insmod"
fi
fi
#
# Install basic binaries
for f in $binfiles ; do
if [ -e /bin/$f ]; then d="/bin"; else d="/usr/bin"; fi
ldd $d/$f | sed "s/\t//" | cut -d " " -f1 >> $unsorted
copy $d/$f bin
done
#
# Add lvm if present
if [ -x /sbin/lvm ] ; then sbinfiles="$sbinfiles lvm dmsetup"; fi
for f in $sbinfiles ; do
ldd /sbin/$f | sed "s/\t//" | cut -d " " -f1 >> $unsorted
copy $f sbin
done
#
# Add udevd libraries if not in /sbin
if [ -x /lib/udev/udevd ] ; then
ldd /lib/udev/udevd | sed "s/\t//" | cut -d " " -f1 >> $unsorted
elif [ -x /lib/systemd/systemd-udevd ] ; then
ldd /lib/systemd/systemd-udevd | sed "s/\t//" | cut -d " " -f1 >> $unsorted
fi
#
# Add module symlinks if appropriate
if [ -n "$KERNEL_VERSION" ] && [ -x /bin/kmod ] ; then
ln -s kmod $WDIR/bin/lsmod
ln -s kmod $WDIR/bin/insmod
fi
#
# Add lvm symlinks if appropriate
# Also copy the lvm.conf file
if [ -x /sbin/lvm ] ; then
ln -s lvm $WDIR/sbin/lvchange
ln -s lvm $WDIR/sbin/lvrename
ln -s lvm $WDIR/sbin/lvextend
ln -s lvm $WDIR/sbin/lvcreate
ln -s lvm $WDIR/sbin/lvdisplay
ln -s lvm $WDIR/sbin/lvscan
ln -s lvm $WDIR/sbin/pvchange
ln -s lvm $WDIR/sbin/pvck
ln -s lvm $WDIR/sbin/pvcreate
ln -s lvm $WDIR/sbin/pvdisplay
ln -s lvm $WDIR/sbin/pvscan
ln -s lvm $WDIR/sbin/vgchange
ln -s lvm $WDIR/sbin/vgcreate
ln -s lvm $WDIR/sbin/vgscan
ln -s lvm $WDIR/sbin/vgrename
ln -s lvm $WDIR/sbin/vgck
# Conf file(s)
cp -a /etc/lvm $WDIR/etc
fi
#
# Install libraries
sort $unsorted | uniq | while read library ; do
if [ "$library" == "linux-vdso.so.1" ] ||
[ "$library" == "linux-gate.so.1" ]; then
continue
fi
copy $library lib
done
if [ -d /lib/udev ]; then cp -a /lib/udev $WDIR/lib; fi
if [ -d /lib/systemd ]; then cp -a /lib/systemd $WDIR/lib; fi
#
# Install the kernel modules if requested
if [ -n "$KERNEL_VERSION" ]; then
find \
/lib/modules/$KERNEL_VERSION/kernel/{crypto,fs,lib} \
/lib/modules/$KERNEL_VERSION/kernel/drivers/{block,ata,md,firewire} \
/lib/modules/$KERNEL_VERSION/kernel/drivers/{scsi,message,pcmcia,virtio} \
/lib/modules/$KERNEL_VERSION/kernel/drivers/usb/{host,storage} \
-type f 2> /dev/null | cpio --make-directories -p --quiet $WDIR
cp /lib/modules/$KERNEL_VERSION/modules.{builtin,order} $WDIR/lib/modules/$KERNEL_VERSION
depmod -b $WDIR $KERNEL_VERSION
fi
( cd $WDIR ; find . | cpio -o -H newc --quiet | gzip -9 ) > $INITRAMFS_FILE
#
# Remove the temporary directory and file
rm -rf $WDIR $unsorted
printf "done.\n"
EOF
chmod 0755 %{buildroot}/sbin/mkinitramfs
#-----------------------------------------------------------------------------
install -vdm 755 %{buildroot}/usr/share/mkinitramfs
cat > %{buildroot}/usr/share/mkinitramfs/init.in <<- "EOF"
#!/bin/sh
PATH=/bin:/usr/bin:/sbin:/usr/sbin
export PATH
problem() {
printf "Encountered a problem!\n\nDropping you to a shell.\n\n"
sh
}
no_device() {
printf "The device %s, which is supposed to contain the\n" $1
printf "root file system, does not exist.\n"
printf "Please fix this problem and exit this shell.\n\n"
}
no_mount() {
printf "Could not mount device %s\n" $1
printf "Sleeping forever. Please reboot and fix the kernel command line.\n\n"
printf "Maybe the device is formatted with an unsupported file system?\n\n"
printf "Or maybe filesystem type autodetection went wrong, in which case\n"
printf "you should add the rootfstype=... parameter to the kernel command line.\n\n"
printf "Available partitions:\n"
}
do_mount_root() {
mkdir /.root
[ -n "$rootflags" ] && rootflags="$rootflags,"
rootflags="$rootflags$ro"
case "$root" in
/dev/* ) device=$root ;;
UUID=* ) eval $root; device="/dev/disk/by-uuid/$UUID" ;;
LABEL=*) eval $root; device="/dev/disk/by-label/$LABEL" ;;
"" ) echo "No root device specified." ; problem ;;
esac
while [ ! -b "$device" ] ; do
no_device $device
problem
done
if ! mount -n -t "$rootfstype" -o "$rootflags" "$device" /.root ; then
no_mount $device
cat /proc/partitions
while true ; do sleep 10000 ; done
else
echo "Successfully mounted device $root"
fi
}
init=/sbin/init
root=
rootdelay=
rootfstype=auto
ro="ro"
rootflags=
device=
mount -n -t devtmpfs devtmpfs /dev
mount -n -t proc proc /proc
mount -n -t sysfs sysfs /sys
mount -n -t tmpfs tmpfs /run
read -r cmdline < /proc/cmdline
for param in $cmdline ; do
case $param in
init=* ) init=${param#init=} ;;
root=* ) root=${param#root=} ;;
rootdelay=* ) rootdelay=${param#rootdelay=} ;;
rootfstype=*) rootfstype=${param#rootfstype=} ;;
rootflags=* ) rootflags=${param#rootflags=} ;;
ro ) ro="ro" ;;
rw ) ro="rw" ;;
esac
done
#
# udevd location depends on version
if [ -x /sbin/udevd ]; then
UDEVD=/sbin/udevd
elif [ -x /lib/udev/udevd ]; then
UDEVD=/lib/udev/udevd
elif [ -x /lib/systemd/systemd-udevd ]; then
UDEVD=/lib/systemd/systemd-udevd
else
echo "Cannot find udevd nor systemd-udevd"
problem
fi
${UDEVD} --daemon --resolve-names=never
udevadm trigger
udevadm settle
if [ -f /etc/mdadm.conf ]; then mdadm -As; fi
if [ -x /sbin/vgchange ]; then /sbin/vgchange -a y > /dev/null; fi
if [ -n "$rootdelay" ]; then sleep "$rootdelay"; fi
do_mount_root
killall -w ${UDEVD##*/}
exec switch_root /.root "$init" "$@"
EOF
#-----------------------------------------------------------------------------
# Create file list
find "${RPM_BUILD_ROOT}" -not -type d -print > filelist.list
sed -i "s|^${RPM_BUILD_ROOT}||" filelist.list
#-----------------------------------------------------------------------------
%files -f filelist.list
%defattr(-,root,root)
#-----------------------------------------------------------------------------
%post
%postun
#-----------------------------------------------------------------------------
%changelog
* Mon Jun 01 2020 Chris Cromer <chris@cromer.cl> 9.1-1
* Sun Sep 09 2018 baho-utot <baho-utot@columbus.rr.com> 8.2-1
- Initial build. First version