samsapti/dotfiles
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

erase-disk.sh: add --crypy-prep flag

Browse source
This commit is contained in:
the_4n0nym0u53 2022-03-06 16:50:10 +01:00
parent 246e1ca9eb
commit 6dc6ca0e3f
No known key found for this signature in database
GPG key ID: 35EE09F5481049BB
1 changed files with 20 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
scripts/.local/bin/erase-disk.sh
View file

@ -7,11 +7,12 @@ usage() {
echo "Securely erase DEVICE with PASSES passes" echo "Securely erase DEVICE with PASSES passes"
echo echo
echo "Flags:" echo "Flags:"
echo " -h, --help \tDisplay this help message" echo " -h, --help \t\tDisplay this help message"
echo " -c, --crypt-prep \tPrepare DEVICE for encryption"
echo echo
echo "Options:" echo "Options (must come after flags):"
echo " DEVICE \tThe device to erase" echo " DEVICE \t\tThe device to erase"
echo " PASSES \tHow many times to erase DEVICE" echo " PASSES \t\tHow many times to erase DEVICE"
echo echo
echo "This script will securely erase a disk device with the specified amount" echo "This script will securely erase a disk device with the specified amount"
echo "of passes (rounds). It does so by overwriting the specified device with" echo "of passes (rounds). It does so by overwriting the specified device with"
@ -22,36 +23,45 @@ usage() {
echo "erase-disk.sh is licensed under The Unlicense." echo "erase-disk.sh is licensed under The Unlicense."
} }
CRYPT=0
[ "$1" = "-h" -o "$1" = "--help" ] && usage && exit 0 [ "$1" = "-h" -o "$1" = "--help" ] && usage && exit 0
[ "$1" = "-c" -o "$1" = "--crypt-prep" ] && CRYPT=1 && shift
if [ $# -lt 2 ]; then if [ $# -lt 2 ]; then
echo "ERROR: Not enough options!" echo "=> ERROR: Not enough options!"
echo echo
usage usage
exit 1 exit 1
elif [ $# -gt 2 ]; then elif [ $# -gt 2 ]; then
echo "ERROR: Too many options!" echo "=> ERROR: Too many options!"
echo echo
usage usage
exit 1 exit 1
elif [ $(id -u) -ne 0 ]; then elif [ $(id -u) -ne 0 ]; then
echo "ERROR: Must run as root!" echo "=> ERROR: Must run as root!"
echo echo
usage usage
exit 1 exit 1
fi fi
echo "# Securely erasing the disk device $2" echo "=> Securely erasing the disk device $2"
i=1 i=1
while [ $i -le $1 ]; do while [ $i -le $1 ]; do
[ $i -eq 1 ] && if="/dev/urandom" || if="/dev/zero" [ $i -eq 1 ] && if="/dev/urandom" || if="/dev/zero"
[ $CRYPT -eq 1 -a $i -eq $1 ] && if="/dev/urandom"
echo "\n- Begin pass $i with $if" echo "\n -> Begin pass $i with $if"
dd if="$if" of="$2" status="progress" dd if="$if" of="$2" status="progress"
echo "- Syncing I/O" echo "\n -> Syncing I/O"
sync sync
i=$(( i + 1 )) i=$(( i + 1 ))
done done
echo -n "\n=> Done! $2 securely erased"
[ $CRYPT -eq 1 ] && echo -n " and prepared for encryption"
echo "."