107 lines
2.3 KiB
Bash
107 lines
2.3 KiB
Bash
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#!/bin/bash
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#
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# mkrootfs.sh - creates a root file system
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#
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# TODO: need to add checks here to verify that busybox, uClibc and bzImage
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# exist
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# command-line settable variables
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BUSYBOX_DIR=..
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UCLIBC_DIR=../../uClibc
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TARGET_DIR=./loop
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FSSIZE=4000
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CLEANUP=1
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MKFS='mkfs.ext2 -F'
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# don't-touch variables
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BASE_DIR=`pwd`
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while getopts 'b:u:s:t:Cm' opt
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do
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case $opt in
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b) BUSYBOX_DIR=$OPTARG ;;
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u) UCLIBC_DIR=$OPTARG ;;
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t) TARGET_DIR=$OPTARG ;;
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s) FSSIZE=$OPTARG ;;
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C) CLEANUP=0 ;;
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m) MKFS='mkfs.minix' ;;
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*)
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echo "usage: `basename $0` [-bu]"
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echo " -b DIR path to busybox direcory (default ..)"
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echo " -u DIR path to uClibc direcory (default ../../uClibc)"
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echo " -t DIR path to target direcory (default ./loop)"
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echo " -s SIZE size of root filesystem in Kbytes (default 4000)"
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echo " -C don't perform cleanup (umount target dir, gzip rootfs, etc.)"
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echo " (this allows you to 'chroot loop/ /bin/sh' to test it)"
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echo " -m use minix filesystem (default is ext2)"
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exit 1
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;;
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esac
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done
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# clean up from any previous work
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mount | grep -q loop
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[ $? -eq 0 ] && umount $TARGET_DIR
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[ -d $TARGET_DIR ] && rm -rf $TARGET_DIR/
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[ -f rootfs ] && rm -f rootfs
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[ -f rootfs.gz ] && rm -f rootfs.gz
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# prepare root file system and mount as loopback
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dd if=/dev/zero of=rootfs bs=1k count=$FSSIZE
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$MKFS -i 2000 rootfs
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mkdir $TARGET_DIR
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mount -o loop,exec rootfs $TARGET_DIR # must be root
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# install uClibc
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mkdir -p $TARGET_DIR/lib
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cd $UCLIBC_DIR
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make INSTALL_DIR=
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cp -a libc.so* $BASE_DIR/$TARGET_DIR/lib
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cp -a uClibc*.so $BASE_DIR/$TARGET_DIR/lib
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cp -a ld.so-1/d-link/ld-linux-uclibc.so* $BASE_DIR/$TARGET_DIR/lib
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cp -a ld.so-1/libdl/libdl.so* $BASE_DIR/$TARGET_DIR/lib
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cp -a crypt/libcrypt.so* $BASE_DIR/$TARGET_DIR/lib
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cd $BASE_DIR
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# install busybox and components
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cd $BUSYBOX_DIR
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make distclean
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make CC=$BASE_DIR/$UCLIBC_DIR/extra/gcc-uClibc/i386-uclibc-gcc
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make PREFIX=bootfloppy/loop install
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cd $BASE_DIR
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# make files in /dev
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mkdir $TARGET_DIR/dev
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./mkdevs.sh $TARGET_DIR/dev
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# make files in /etc
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cp -a etc $TARGET_DIR
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ln -s /proc/mounts $TARGET_DIR/etc/mtab
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# other miscellaneous setup
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mkdir $TARGET_DIR/initrd
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mkdir $TARGET_DIR/proc
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$UCLIBC_DIR/ld.so-1/util/ldconfig -r $TARGET_DIR
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# Done. Maybe do cleanup.
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if [ $CLEANUP -eq 1 ]
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then
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umount $TARGET_DIR
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rmdir $TARGET_DIR
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gzip -9 rootfs
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fi
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