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#!/bin/sh
#BLURB="Create a USB Linux boot stick"
RDIR=/dev/tty4
NDIR=/dev/null
TMP=/var/log/setup/tmp
if [ ! -d $TMP ]; then
mkdir -p $TMP
fi
T_PX="$1"
ROOT_DEVICE="$2"
while [ 0 ]; do # the bootdisk menu loop
# Run "rescan-scsi-bus -l" to get an up to date overview of devices:
/sbin/rescan-scsi-bus -l 1>$RDIR 2>$RDIR
# Get a list of removable block devices before the USB stick is inserted:
echo "" > $TMP/remov_prior
for BDEV in $(ls --indicator-style none /sys/block | egrep -v "loop|ram"); do
[ -r /sys/block/$BDEV/removable -a "$(cat /sys/block/$BDEV/removable)" == "1" ] \
&& echo $BDEV >> $TMP/remov_prior
done
dialog --title "MAKE USB FLASH BOOT" --default-item "Skip" --menu \
"If your computer supports booting from a USB device, it is recommended that you make \
a USB boot stick for your system at this time. It will boot your computer straight \
into the root filesystem on $ROOT_DEVICE. \n\
\n\
Please insert a USB flash memory stick and then press ENTER to create a boot stick. \n\
\n\
WARNING! The existing contents of the USB stick will be erased. \n\
" 18 70 2 \
"Create" "Make a USB Linux boot stick" \
"Skip" "Skip making a USB boot stick" \
2> $TMP/return
REPLY=`cat $TMP/return`
rm -f $TMP/return
if [ "$REPLY" = "Create" ]; then
# Run "rescan-scsi-bus -l" to discover our USB stick if needed:
/sbin/rescan-scsi-bus -l 1>$RDIR 2>$RDIR
# Get a list of removable block devices after the USB stick is inserted:
echo "" > $TMP/remov_after
for BDEV in $(ls --indicator-style none /sys/block | egrep -v "loop|ram"); do
[ -r /sys/block/$BDEV/removable -a "$(cat /sys/block/$BDEV/removable)" == "1" ] \
&& echo $BDEV >> $TMP/remov_after
done
ADDED=$(diff -u $TMP/remov_prior $TMP/remov_after | sed -n 's/^\+//p' | grep -v '^+')
REMVD=$(diff -u $TMP/remov_prior $TMP/remov_after | sed -n 's/^\+//p' | grep -v '^+')
if [ -n "$ADDED" ] ; then STICK=$ADDED ; else STICK="" ; fi
rm $TMP/remov_prior $TMP/remov_after
if [ ! -n "$STICK" ]; then
dialog --title "NO NEW DEVICE DETECTED" --ok-label Restart --msgbox \
"No new USB device was detected.
If you had already inserted your USB stick, please remove it now. \
Then select 'Restart'." 7 70
continue
else
VENDOR="Vendor : $(cat /sys/block/$STICK/device/vendor)"
MODEL="Model : $(cat /sys/block/$STICK/device/model)"
SIZE="Size : $(( $(cat /sys/block/$STICK/size) / 2048)) MB"
dialog --title "NEW DEVICE DETECTED" --yesno \
"A new USB device '/dev/$STICK' was detected with specifications:
-- $VENDOR
-- $MODEL
-- $SIZE
If this is the USB stick to use, select 'Yes',
otherwise select 'No'." 12 70
if [ $? -eq 1 ]; then
continue
fi
fi
dialog --title "CREATING USB BOOT STICK" --infobox "Creating SYSLINUX bootdisk for \
$ROOT_DEVICE on /dev/$STICK." 3 64
# Determine max size of the filesystem (in KB) we want to create:
USBSIZE=$(( $(cat /sys/block/$STICK/size) / 2048))
if [ $USBSIZE -lt 512 ]; then DOSSIZE=$(($USBSIZE*1024))
else DOSSIZE=$((512*1024))
fi
# Hack from Pat. If we're wasting a whole stick, who cares if the partition is
# extra-small, as long as the kernel fits? Also, FAT12 is the least problematic.
DOSSIZE=15861
if [ -x /sbin/mkdosfs ]; then
/sbin/mkdosfs -I -n USBSLACK -F 12 /dev/$STICK $DOSSIZE 1> /dev/null 2> /dev/null
else
chroot $T_PX /sbin/mkdosfs -I -n USBSLACK -F 12 /dev/$STICK $DOSSIZE 1> /dev/null 2> /dev/null
fi
if [ ! -d $TMP/bootdisk ]; then
mkdir $TMP/bootdisk
fi
mount -t vfat /dev/$STICK $TMP/bootdisk 1> /dev/null 2> /dev/null
if [ -r $T_PX/vmlinuz ]; then
cp $T_PX/vmlinuz $TMP/bootdisk/vmlinuz
elif [ -r $T_PX/boot/vmlinuz ]; then
cp $T_PX/boot/vmlinuz $TMP/bootdisk/vmlinuz
fi
# We don't need the isolinux bootloader with syslinux do we?
#cp $T_PX/usr/share/syslinux/isolinux.bin $TMP/bootdisk/
cat << EOF > $TMP/bootdisk/message.txt
Welcome to the 09Slackware07 Linux custom USB boot stick!
By default, this stick boots a root Linux partition on $ROOT_DEVICE when you
hit ENTER. If you'd like to boot some other partition, use a command like
this on the prompt below:
mount root=/dev/sda1 ro
Where "/dev/sda1" is the partition you want to boot, and "ro" specifies that
the partition should be initially mounted as read-only. If you wish to mount
the partition read-write, use "rw" instead. To set the video console mode,
use the vga= parameter (press F1 to see a table). You may also add any other
kernel parameters you might need depending on your hardware, and which
drivers are included in your kernel.
EOF
cat << EOF > $TMP/bootdisk/syslinux.cfg
default vmlinuz root=$ROOT_DEVICE vga=normal ro
prompt 1
timeout 6000
display message.txt
F1 f1.txt
F2 message.txt
#F3 f3.txt
#F4 f4.txt
#F5 f5.txt
#F6 f6.txt
#F7 f7.txt
label mount
kernel vmlinuz
append root=$ROOT_DEVICE vga=normal ro
EOF
cat << EOF > $TMP/bootdisk/f1.txt
STANDARD MODES:
To make the kernel prompt for standard video modes use: vga=ask
FRAMEBUFFER MODES:
To get the kernel to start in VESA framebuffer mode, you need to pass it
a vga= init string on the "boot:" prompt. Here's a table:
Colors 640x480 800x600 1024x768 1280x1024 1600x1200
--------+---------------------------------------------
256 | 769 771 773 775 796
32,768 | 784 787 790 793 797
65,536 | 785 788 791 794 798
16.8M | 786 789 792 795 799
...such as this for 1024x768x64k:
vga=791
F2 returns to the previous page.
EOF
umount /dev/$STICK
rm -r $TMP/bootdisk
# Make the device bootable:
syslinux -s /dev/$STICK 1> /dev/null 2> /dev/null
dialog --title "USB BOOT STICK CREATED" --ok-label Continue --cancel-label Create --menu \
"The USB boot stick has been successfully created in /dev/$STICK. If you would like to \
create an additional boot stick, please select 'Create' and we'll go back and make another \
one, otherwise select 'Continue' to continue configuring your system." 12 70 2 \
"Continue" "Continue the configuration (done making boot sticks)" \
"Create" "Make a spare Linux boot stick in /dev/$STICK" \
2> $TMP/return
REPLY=`cat $TMP/return`
rm -f $TMP/return
if [ "$REPLY" = "Create" ]; then
continue
else
break
fi
else # ! Create
break
fi
done
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