You may not be looking at the right script. My fastboot script says:
=======================================
$ cat linuxrc-fastboot
#!/bin/sh
# Copyright (c) 2006, Technologic Systems.
# All rights reserved.
#
# Uses initrd as root filesystem and drops to shell-- on exit of serial shell,
# real Linux is booted. Ethernet is configured as 192.168.0.50 and telnet
# server is run. If a USB device is present, it is checked for the presence
# of an auto-update script "/tsinit", which is then run.
mount -t proc proc /proc
export CONSOLE=/dev/ttyAM0
export PATH=/bin:/mnt/root/bin:/mnt/root/sbin:/mnt/root/usr/bin:/mnt/root/usr/sb in:/mnt/root/usr/local/bin
export BOOTTIME=`eptime`
ifconfig eth0 192.168.0.50
telnetd
check-usb-update >/dev/null 2>&1 </dev/null &
(
export ENV=/shinit
setcons
exec /bin/sh -i
) <$CONSOLE >$CONSOLE 2>&1
killall busybox
insmod -q -f /sdcard.o dmaenable=1 >/dev/null 2>&1
if [ -e /dev/sdcard0/disc0/part3 -a ! -e /mnt/root/bin/mount ]; then
mount -o ro /dev/sdcard0/disc0/part3 /mnt/root >/dev/null 2>&1
fi
(...)
=======================================
You can see that here, Mount is passed "-o ro" to mount the SD media as read-only, which then either must be changed to "-o rw" or modified with a subsequent call using "-o remount,rw".
mount -o ro /dev/sdcard0/disc0/part3 /mnt/root >/dev/null 2>&1
Dustin Oprea
On 12/18/07,
Art <> wrote:
I'm trying to setup a system to boot quickly. I only need to run the
CAN driver and my application plus Apache or some other web server. I
do need to edit files on the SD card partition 3. In fastboot that
file system is readonly and I need it to be RW. I can't seem to find
where I change that in the fastboot script. Once I make the
filesystem RW I will then load the drivers and software in the initrc2
Script. So far I have not been able to load things from the script.
The modified scrip. Below.
#!/bin/sh
export BOOTTIME=`eptime`
startfpga "$@" &
/etc/init.d/ArcosServer
/etc/init.d/apache start
if jp 2; then
jp2=1
if jp 4; then
CONSOLE=/dev/ttyAM1
else
CONSOLE=/dev/ttyAM0
fi
else
CONSOLE=/dev/null
fi
export
PATH=/bin:/mnt/root/bin:/mnt/root/sbin:/mnt/root/usr/bin:/mnt/root/usr/sbin
if [ "$1" = "fastboot" ]; then
(
export ENV=/serial-shinit
if [ "$jp2" -eq "1" ]; then
/bin/sh -i
rm -f /serialsh.pid >/dev/null 2>&1
if [ -e /vidsh.pid ]; then
kill -1 `cat /vidsh.pid`
>/vidsh-aborted
else
>/vidsh-userexited
fi
fi
) <$CONSOLE >$CONSOLE 2>&1
wait
echo
else
wait
fi
if [ "$CONSOLE" = "/dev/null" -o -e /vidsh-userexited ]; then
CONSOLE="/dev/vc/0"
fi
export CONSOLE
(
stty -F $CONSOLE ospeed 115200 >/dev/null 2>&1
echo ">> Booting Linux ..."
) >$CONSOLE
pivot_root . initrd
/bin/mount -n --move initrd/dev /dev
/bin/mount -n --move initrd/proc /proc
exec /usr/sbin/chroot . /bin/sh <<- EOF
exec /sbin/init
EOF
-- Dustin Oprea Software Engineer Intrepid Control Systems (1+) 248-726-0605
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