Oh and right. What D.R.Polstra outlines seems to work with systemd. What I explained will work with sysv for sure, but not so sure for systemd. Even though systemd is supposed to be backwards compatible with sysv blah blah blah . . .
On Fri, Jul 10, 2015 at 1:25 PM, William Hermans <[email protected]> wrote: > heh ! No worries Phil I was mostly just giving you a hard time. As I've > seen some vids you've done( reverse engineering, friend had vids ), and > they were pretty good :) > > On Fri, Jul 10, 2015 at 10:12 AM, Philip Polstra <[email protected]> > wrote: > >> Sorry, I just pasted in my script that does way more so you could see the >> syntax for creating mass storage device. Shows how to keep other devices >> from going away. Part of my BBB based writeblocker for defcon. >> >> On Fri, Jul 10, 2015, 12:45 PM William Hermans <[email protected]> wrote: >> >>> wow Phil, way to over complicate g_multi heh. >>> >>> nano /etc/modules -> add 'g_multi file=/path/to/sdcard' >>> >>> No quotes. >>> >>> The above is persistent, and by its self requires a system restart in >>> order to become 'active' However you can also use modprobe to load the >>> module without a restart. Using the exact same parameters. Like this: >>> >>> $ sudo modprobe g_multi file=/path/to/sdcard >>> >>> So for the inexperienced. g_multi will load all three USB gadget >>> drivers. Equivalents to g_mass_storage, g_ether, and g_serial. In order to >>> use the other gadgets, they must be configured. Also, for what it is worth, >>> only one gadget driver can be loaded / used at a time. Hence the need for >>> g_multi. >>> >>> >>> On Fri, Jul 10, 2015 at 6:44 AM, Philip Polstra <[email protected]> >>> wrote: >>> >>>> You want to use the USB gadget to export the SD Card filesystem. This >>>> is similar to something I'm doing for an upcoming DEFCON talk. Here is the >>>> script for that talk: >>>> >>>> #!/bin/bash >>>> # stop the GETTY service if needed >>>> if which 'systemctl' ; then >>>> systemctl stop [email protected] >/dev/null >>>> fi >>>> # unload current composite gadget >>>> modprobe -r g_multi >>>> # these variables are used to export all partitions >>>> fstr="" >>>> rostr="" >>>> # unmount the USB drive >>>> for d in $(ls /dev/sd*) ; do >>>> if echo "$d" | egrep '[1-9]$' >/dev/null ; then >>>> umount $d >>>> fstr+=",$d" >>>> rostr+=",1" >>>> fi >>>> done >>>> fstr=${fstr:1} # strip leading comma >>>> rostr=${rostr:1} # strip leading comma >>>> echo "$fstr" >/tmp/usbexports # save for later r/w export >>>> >>>> # now export it >>>> vend=$(( 0x1337 )) # pick your favorite vid/pid >>>> prod=$(( 0x1337 )) >>>> echo "$vend" >/tmp/usbvend # save vid/pid for r/w export >>>> echo "$prod" >/tmp/usbprod >>>> modprobe g_multi file=$fstr cdrom=0 stall=0 ro=$rostr \ >>>> removable=1 nofua=1 idVendor=$vend idProduct=$prod >>>> >>>> >>>> On Fri, Jul 10, 2015 at 9:26 AM <[email protected]> wrote: >>>> >>>>> I have a new BBB with Debian. I want the SD Card to appear on the USB >>>>> port (to Host) rather than the internal memory. I find references to >>>>> uDev.txt and modifying other files related to boot but it seems like it;s >>>>> more for the pre Debain stuff. I have the card formatted and when I ssh >>>>> in, I can see it mounted in /media so I am that far. I put a iDev.txt on >>>>> that card. What else do I change? >>>>> >>>>> Thanks >>>>> >>>>> -Jim >>>>> >>>>> -- >>>>> For more options, visit http://beagleboard.org/discuss >>>>> --- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "BeagleBoard" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "BeagleBoard" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
