forge/pmaports
1
0
Fork 0
Code Issues 2 Pull requests Projects Releases Packages Wiki Activity Actions

postmarketos-mkinitfs-hook-debug-shell: Add setup_usb_storage.sh (MR 4450)

Browse source
This commit is contained in:
Ion Agorria 2023-10-18 19:00:08 +02:00 committed by Clayton Craft
parent 5626781fca
commit 1258df73d7
No known key found for this signature in database
GPG key ID: 4A4CED6D7EDF950A
4 changed files with 76 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
main/postmarketos-mkinitfs-hook-debug-shell/20-debug-shell.files
View file

@ -2,6 +2,7 @@
/usr/bin/fftest
/usr/bin/libinput
/usr/libexec/libinput/*
/usr/libexec/postmarketos-mkinitfs/setup_usb_storage.sh:/usr/bin/setup_usb_storage
/usr/sbin/fbdebug
/usr/sbin/reboot-mode
/usr/sbin/telnetd

3
main/postmarketos-mkinitfs-hook-debug-shell/20-debug-shell.sh
View file

@ -12,6 +12,8 @@ show_splash "WARNING: debug-shell is active\\nhttps://postmarketos.org/debug-she
echo "Create 'pmos_continue_boot' script"
{
echo "#!/bin/sh"
#Disable any active usb mass storage
echo "if [ -d /config/usb_gadget/g1/functions/mass_storage.0 ]; then setup_usb_storage; fi"
echo "pkill -9 -f pmos_shell"
echo "pkill -f pmos_loop_forever"
echo "pkill -f telnetd.*:${TELNET_PORT}"
@ -57,6 +59,7 @@ echo "---"
echo "WARNING: debug-shell is active on ${host_ip}:${TELNET_PORT}."
echo "This is a security hole! Only use it for debugging, and"
echo "uninstall the debug-shell hook afterwards!"
echo "You can expose storage devices using 'setup_usb_storage /dev/DEVICE'"
echo "---"
pmos_shell

11
main/postmarketos-mkinitfs-hook-debug-shell/APKBUILD
View file

@ -1,10 +1,10 @@
pkgname=postmarketos-mkinitfs-hook-debug-shell
pkgver=0.4.7
pkgver=0.5.0
pkgrel=0
pkgdesc="Root shell in the initramfs (security hole, for debugging only)"
url="https://postmarketos.org"
depends="postmarketos-mkinitfs devicepkg-utils fbdebug evtest linuxconsoletools reboot-mode libinput libinput-tools"
source="20-debug-shell.sh 20-debug-shell.files"
source="20-debug-shell.sh 20-debug-shell.files setup_usb_storage.sh"
arch="noarch"
license="GPL2"
options="!check"
@ -14,9 +14,12 @@ package() {
"$pkgdir"/usr/share/mkinitfs/hooks/20-debug-shell.sh
install -Dm644 "$srcdir"/20-debug-shell.files \
"$pkgdir"/usr/share/mkinitfs/files/20-debug-shell.files
install -Dm755 "$srcdir"/setup_usb_storage.sh \
"$pkgdir"/usr/libexec/postmarketos-mkinitfs/setup_usb_storage.sh
}
sha512sums="
42ef2f0a1089bba9cbe094b346b68df62b9499de0e6193e4d19bc0c491b2bc2ae14399908fd1371dd9111261fca0df4526f7dc13e7c861834b01fc03a3ed5fc4 20-debug-shell.sh
845d2eb6ab72c5c1472d65305241ca21dbc26784684e9ae99a180a255f8f7f62123b363d73c642df1f9687106340078311a68a76c123f16829b941bff9151735 20-debug-shell.files
0750a33f3b68fd6f751bdcf3c59656ec8c8af60e13c25b13394937134d4cbeaacd237b5d92e2a978319f705781f39712c71673367cec52b584f666af50b6f952 20-debug-shell.sh
a739bc47d905d189edb26d9ebfd062023720fefdaab27207471c16d53a9c12ea8b81092a1047d8f2300e42ba500bdf6c5a3343aca55aab5bf8e84d68eb5680ab 20-debug-shell.files
75d485c2e9f352cfd717b7a92753a9dfc4a72526a44bcbb784eacb4ef9011072b3ffa1c42a317c0940598cc076fb6c61676c440e5b188378b19ca08d882c1338 setup_usb_storage.sh
"

65
main/postmarketos-mkinitfs-hook-debug-shell/setup_usb_storage.sh Normal file
View file

@ -0,0 +1,65 @@
#!/bin/sh
# shellcheck disable=SC1091
. /init_functions.sh
. /usr/share/misc/source_deviceinfo
# See: https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt
_configfs=/config/usb_gadget
if ! [ -e "$_configfs" ]; then
echo "/config/usb_gadget does not exist, can't setup configfs usb mass storage gadget"
exit 1
fi
# Create storage function.
usb_mass_storage_function="mass_storage.0"
if [ ! -d $_configfs/g1/functions/"$usb_mass_storage_function" ]; then
if ! mkdir $_configfs/g1/functions/"$usb_mass_storage_function"; then
echo "Couldn't create $_configfs/g1/functions/$usb_mass_storage_function"
exit 1
fi
fi
lun="0"
storage_dev="$1"
if [ -z "${storage_dev}" ]; then
#https://www.kernel.org/doc/html/latest/usb/gadget_configfs.html#cleaning-up
#First unlink the config
if [ -e $_configfs/g1/configs/c.1/"$usb_mass_storage_function" ]; then
echo "Disabling current usb storage device"
rm $_configfs/g1/configs/c.1/"$usb_mass_storage_function"
fi
#Delete the function config
if [ -d $_configfs/g1/functions/"$usb_mass_storage_function" ]; then
rmdir $_configfs/g1/functions/"$usb_mass_storage_function"
fi
elif [ -e "${storage_dev}" ]; then
if [ ! -d $_configfs/g1/functions/"$usb_mass_storage_function/lun.$lun" ]; then
if ! mkdir $_configfs/g1/functions/"$usb_mass_storage_function/lun.$lun"; then
echo " Couldn't create $_configfs/g1/functions/$usb_mass_storage_function/lun.$lun"
exit 1
fi
echo "0" > $_configfs/g1/functions/"$usb_mass_storage_function/lun.$lun"/removable
echo "0" > $_configfs/g1/functions/"$usb_mass_storage_function/lun.$lun"/nofua
echo "0" > $_configfs/g1/functions/"$usb_mass_storage_function/lun.$lun"/cdrom
echo "LUN $lun" > $_configfs/g1/functions/"$usb_mass_storage_function/lun.$lun"/inquiry_string
fi
echo "Setting $storage_dev as current usb storage"
echo "$storage_dev" > $_configfs/g1/functions/"$usb_mass_storage_function/lun.$lun"/file
# Link the usb storage instance to the configuration
if [ ! -e $_configfs/g1/configs/c.1/"$usb_mass_storage_function" ]; then
if ! ln -s $_configfs/g1/functions/"$usb_mass_storage_function" $_configfs/g1/configs/c.1; then
echo "Couldn't symlink $usb_mass_storage_function"
exit 1
fi
fi
else
echo "$storage_dev not found"
exit 1
fi
#Reset UDC to apply changes
setup_usb_configfs_udc