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Date:      Sun, 23 Feb 1997 04:21:27 -0800
From:      Jason Wells <jcwells@u.washington.edu>
To:        freebsd-doc@freebsd.org
Subject:   Bootable floppy script
Message-ID:  <33103647.41C67EA6@u.washington.edu>
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I liked your bootable floppy script, but I had trouble with running out
of space on the floppy even though my kernel was teh bare minumum. I
have supplied an edited script. Some changes in order were made. The
MAKEDEV section was put in front of other sections so that when rm
MAKEDEV is done there is more space left on the disk for other things. I
also stripped my kernel to get uneeded compile junk out of there. <---
highly technical jargon :)

Though I changed the script to suit my own purpose, I feel the
modifications will be benificial to all users and can be applied
universally. Look for these command lines. If you decide to use this I
highly recommend double checking it as I am a novice UNIX user.

Oh yeah, this boot floppy tested satisfactory for me. Your mileage may
vary. <--- I'm really starting to get into this :)

Search for #CHANGE to find these changes to the code. There are three
occurences of #CHANGE in the script I provided.

** strip /sys/compile/MINI/kernel
** rm /mnt/dev/MAKEDEV 

Thank you,
Jason Wells

     #!/bin/sh
     #
     # create a restore floppy
     #
     # format the floppy
     #
     PATH=/bin:/sbin:/usr/sbin:/usr/bin
     
     fdformat -q fd0
     if [ $? -ne 0 ]
     then
             echo "Bad floppy, please use a new one"
             exit 1
     fi
     
     # place boot blocks on the floppy
     #
     disklabel -w -B -b /usr/mdec/fdboot -s /usr/mdec/bootfd /dev/rfd0c
fd1440
     
     #
     # newfs the one and only partition
     #
     newfs -t 2 -u 18 -l 1 -c 40 -i 5120 -m 5 -o space /dev/rfd0a
     
     #
     # mount the new floppy
     #
     mount /dev/fd0a /mnt
     
     #
     # create required directories 
     #
     mkdir /mnt/dev
     mkdir /mnt/bin
     mkdir /mnt/sbin
     mkdir /mnt/etc
     mkdir /mnt/root
     mkdir /mnt/mnt                 # for the root partition
     mkdir /mnt/tmp
     mkdir /mnt/var
     
     #
     # populate the directories
     #
     if [ ! -x /sys/compile/MINI/kernel ] 
     then
             cat << EOM
     The MINI kernel does not exist, please create one.
     Here is an example config file:
     #
     # MINI -- A kernel to get FreeBSD on onto a disk.
     #
     machine                "i386"
     cpu            "I486_CPU"
     ident          MINI
     maxusers       5
     
     options                INET                    # needed for _tcp
_icmpstat _ipstat
                                             #            _udpstat
_tcpstat _udb
     options                FFS                     #Berkeley Fast File
System
     options                FAT_CURSOR              #block cursor in
syscons or pccons
     options                SCSI_DELAY=15           #Be pessimistic
about Joe SCSI device
     options                NCONS=2         #1 virtual consoles
     options                USERCONFIG              #Allow user
configuration with -c XXX
     
     config         kernel  root on sd0 swap on sd0 and sd1 dumps on sd0
     
     controller     isa0
     controller     pci0
     
     controller     fdc0    at isa? port "IO_FD1" bio irq 6 drq 2 vector
fdintr
     disk           fd0     at fdc0 drive 0
     
     controller     ncr0
     
     controller     scbus0
     
     device         sc0     at isa? port "IO_KBD" tty irq 1 vector
scintr
     device         npx0    at isa? port "IO_NPX" irq 13 vector npxintr
     
     device         sd0
     device         sd1
     device         sd2
     
     device         st0
     
     pseudo-device  loop            # required by INET
     pseudo-device  gzip            # Exec gzipped a.out's
     EOM
             exit 1
     fi
     
     strip /sys/compile/MINI/kernel #CHANGE save space
     cp -f /sys/compile/MINI/kernel /mnt

     #
     # create the devices nodes 
     #
     
     #
     #CHANGE this was moved up so that it executes prior to
other          #cp's to the floppies...	
     #
 
     cp -f /dev/MAKEDEV /mnt/dev
     chmod 755 /mnt/dev/MAKEDEV
     
     cd /mnt/dev
     ./MAKEDEV std
     ./MAKEDEV sd0
     ./MAKEDEV sd1
     ./MAKEDEV sd2
     ./MAKEDEV st0
     ./MAKEDEV pty0
     cd /
     #CHANGE ... that way MAKEDEV can be removed to save space.
     rm /mnt/dev/MAKEDEV

     gzip -c -best /sbin/init > /mnt/sbin/init
     gzip -c -best /sbin/fsck > /mnt/sbin/fsck
     gzip -c -best /sbin/mount > /mnt/sbin/mount
     gzip -c -best /sbin/halt > /mnt/sbin/halt
     gzip -c -best /sbin/restore > /mnt/sbin/restore
     
     gzip -c -best /bin/sh > /mnt/bin/sh
     gzip -c -best /bin/sync > /mnt/bin/sync
     
     cp /root/.profile /mnt/root
     
     chmod 500 /mnt/sbin/init
     chmod 555 /mnt/sbin/fsck /mnt/sbin/mount /mnt/sbin/halt
     chmod 555 /mnt/bin/sh /mnt/bin/sync
     chmod 6555 /mnt/sbin/restore
     
    
     
     #
     # create minimum filesystem table
     #
     cat > /mnt/etc/fstab <<EOM
     /dev/fd0a      /       ufs     rw 1 1
     EOM
     
     #
     # create minimum passwd file
     #
     cat > /mnt/etc/passwd <<EOM
     root:*:0:0:Charlie &:/root:/bin/sh
     EOM
     
     cat > /mnt/etc/master.passwd <<EOM
     root::0:0::0:0:Charlie &:/root:/bin/sh
     EOM
     
     chmod 600 /mnt/etc/master.passwd
     chmod 644 /mnt/etc/passwd
     /usr/sbin/pwd_mkdb -d/mnt/etc /mnt/etc/master.passwd
     
     #
     # umount the floppy and inform the user
     #
     /sbin/umount /mnt


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