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87 lines
2.1 KiB
87 lines
2.1 KiB
#!/bin/sh
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kernel=`uname -r`
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tmpdir=`mktemp -d`
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empty=0
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if [ "$1" = "empty" ]; then
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empty=1; shift
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fi
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if [ -n "$1" ]; then
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if [ -d "/lib/modules/$1" ]; then
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kernel="$1"
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else
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echo "Can't open /lib/modules/$1: No such directory."
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echo "Usage: $0 [ kernel-version ]"
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exit 1
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fi
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fi
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cat << 'EOT' > $tmpdir/linuxrc.c
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <stdio.h>
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int main()
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{
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EOT
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echo "Creating /boot/initrd-${kernel}.img ..."
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if [ "$empty" = 0 ]; then
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grep '^modprobe ' /etc/conf/kernel |
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grep -v 'no-initrd' | sed 's,[ ]#.*,,' |
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while read a b; do $a -n -v $b 2> /dev/null; done |
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while read a b c; do
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# ouch - this is pretty ugly....
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b="${b//`uname -r`/$kernel}"
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if [ ! -f $tmpdir/${b##*/} ]; then
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echo "Adding $b."; cp $b $tmpdir
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x="$( eval "echo ${b##*/} $c" )"
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cat << EOT >> $tmpdir/linuxrc.c
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/* $x */
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if ( fork() ) wait(NULL);
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else {
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printf("initrd: loading %s.\n", "$x"); fflush(stdout);
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execl("/insmod.static", "/insmod.static", "${x// /", "}", NULL);
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_exit(1);
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}
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EOT
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fi
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done
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fi
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echo -e '\tprintf("initrd: going to re-mount root now.\\n");' >> $tmpdir/linuxrc.c
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echo -e '\treturn 0;\n}' >> $tmpdir/linuxrc.c
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gcc -s -static -Wall -Os -o $tmpdir/linuxrc $tmpdir/linuxrc.c
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cp /sbin/insmod.static* $tmpdir/
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if [ -f $tmpdir/insmod.static.old ]; then
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ln -s insmod.static.old $tmpdir/insmod.old
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fi
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mkdir -p $tmpdir/dev
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mknod $tmpdir/dev/null c 1 3
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mknod $tmpdir/dev/zero c 1 5
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mknod $tmpdir/dev/tty c 5 0
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mknod $tmpdir/dev/console c 5 1
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if false; then
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# FIXME: kernel doesn't like romfs as initrd ?!?!
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genromfs -f /boot/initrd-${kernel}.img.tmp -d $tmpdir
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else
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# This works, but only for initrd images < 4 MB
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dd if=/dev/zero of=/boot/initrd-${kernel}.img.tmp \
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count=4096 bs=1024 &> /dev/null
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mke2fs -m 0 -N 180 -F /boot/initrd-${kernel}.img.tmp &> /dev/null
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mntpoint="`mktemp -d`"
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mount -o loop /boot/initrd-${kernel}.img.tmp $mntpoint
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rmdir $mntpoint/lost+found/
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cp -a $tmpdir/* $mntpoint/
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umount -d $mntpoint
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rmdir $mntpoint
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fi
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gzip < /boot/initrd-${kernel}.img.tmp > /boot/initrd-${kernel}.img
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rm -f /boot/initrd-${kernel}.img.tmp
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rm -rf $tmpdir
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echo "Done."
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