fio --loops=5 --size=1000m --filename=/mnt/fs/fiotest.tmp --stonewall --ioengine=libaio --direct=1 \
--name=Seqread --bs=1m --rw=read \
--name=Seqwrite --bs=1m --rw=write \
--name=512Kread --bs=512k --rw=randread \
--name=512Kwrite --bs=512k --rw=randwrite \
--name=4kQD32read --bs=4k --iodepth=32 --rw=randread \
--name=4kQD32write --bs=4k --iodepth=32 --rw=randwrite
fake sudo
a Script to allow normal user to launch root shell, after providing a KEY file.
In android, I don't want to root my phone, but still needs root access.
So I installed this script, instead of SuperSU.
runas.cc
#include <rlib/sys/unix_handy.hpp>
#include <rlib/opt.hpp>
int main(int argc, char **argv) {
rlib::opt_parser args(argc, argv);
auto keyFile = args.getValueArg("-k", false, "");
setuid(geteuid());
setgid(getegid());
rlib::execs("/bin/bash", std::vector<std::string>{"runas.impl.sh", keyFile});
}
runas.impl.sh
#!/bin/bash
# Usage: 1. Generate your key file, and keep it secret. Get its SHA256 and write it down at `answer`.
# 2. Compile runas.cc, Then run the following commands as root:
# chmod +s ./runas
# 3. Try `./runas -k ./key` as normal user.
#
# File Permissions:
#
# -rwsr-sr-x 1 root root 82K Apr 18 19:29 runas*
# -rw-r--r-- 1 recolic recolic 320 Apr 18 19:29 runas.cc
# ---------- 1 root root 733 Apr 18 19:35 runas.impl.sh*
[ "$1" = "" ] && key_file_name="./key" || key_file_name="$1"
echo "Verifying '$key_file_name'..."
#### Verify key file
checksum=$(sha256sum "$key_file_name" | sed 's/ .*$//g')
answer='07ecd901c90ee7a72efdc0d7e7b47c2b8d02b5a9cfcbb9ae4f0f31561d01af04'
if [ "$checksum" = "$answer" ]; then
bash
else
echo 'Verification failed.'
exit 2
fi
exit $?
I bought a cheap motherboard and realized that, I have no cable for 10pin(motherboard) to 15pin vga. And things went worse after I realized that my USB2TTL cable is not working for RS232 serial port.
Then... I have to install archlinux WITHOUT monitor. But, fortunately, I have a KEYBOARD!
ArchISO
I was too lazy to modify ArchISO. I just plug the ARCHISO usb stick and a blank harddisk, and boot, then a new client appears on my router. The dhcpcd is working out-of-box!
The router told me the IP: 192.168.1.7
Then I type the following characters on my keyboard:
curl https://recolic.cc/setup/ | bash
systemctl start sshd
recolic.org is my self-hosted website, and I can access the nginx access.log to confirm that the command
above has succeeded. The setup script will download my public key, and put it into /root/.ssh/authorized_keys,
and configure the permission bits to make sshd happy.
Now try ssh [email protected]. It works.
Installaion
It's too simple to install an arch linux. archfi made it easy.
Post-installaion
AFter shutdown the machine, remove the harddisk from motherboard, and use another WORKING linux laptop to mount this harddisk. Do the following things:
mount BOOT partition and ROOT partition to /mnt
arch-chroot into it
install openssh, dhcpcd
systemctl enable sshd, dhcpcd
Modify /etc/ssh/sshd_config to allow RootLogin.
Set root password if you're not already done.
put your public key into /root/.ssh/authorized_keys and set the permission properly.
done
Good. Plug the harddisk into the headless machine, it should boot and be ready for ssh-into.
Question
Q: Why not plug the harddisk into another machine, and install the Archlinux OS?
A: Then you need to boot from archiso, and perform grub-install, to allow booting the new OS. Then you have to do everything I have done.
Remove wine file associations. https://askubuntu.com/questions/323437/how-to-prevent-wine-from-adding-file-associations
fuck-wine-mime.sh
#!/bin/bash
# Prevent the fucking wine to add mime file association.
# Implements https://askubuntu.com/questions/323437/how-to-prevent-wine-from-adding-file-associations
set -o xtrace
rm -f ~/.local/share/mime/packages/x-wine*
rm -f ~/.local/share/applications/wine-extension*
rm -f ~/.local/share/icons/hicolor/*/*/application-x-wine-extension*
rm -f ~/.local/share/mime/application/x-wine-extension*
sudo sed -i 's/winemenubuilder.exe -a -r/winemenubuilder.exe -r/g' /usr/share/wine/wine.inf
if [[ "$WINEPREFIX" = "" ]]; then
WINEPREFIX="$HOME/.wine"
fi
if [[ -f "$WINEPREFIX/system.reg" ]]; then
sed -i 's/winemenubuilder.exe -a -r/winemenubuilder.exe -r/g' "$WINEPREFIX/system.reg"
fi
Maybe outdated.
I've used @beliys code and made a bash command.
Setup: Add this code to your ~/.bash_aliases file.
function gdrive_download () {
CONFIRM=$(wget --quiet --save-cookies /tmp/cookies.txt --keep-session-cookies --no-check-certificate "https://docs.google.com/uc?export=download&id=$1" -O- | sed -rn 's/.*confirm=([0-9A-Za-z_]+).*/\1\n/p')
wget --load-cookies /tmp/cookies.txt "https://docs.google.com/uc?export=download&confirm=$CONFIRM&id=$1" -O $2
rm -rf /tmp/cookies.txt
}
Open new bash session. Usage:
gdrive_download long_google_drive_file_id filename.ext
Surface Book 2 / Surface Pro (2017) / Surface Laptop UART protocol proof-of-concept script.
This script is from https://github.com/jakeday/linux-surface/issues/28#issuecomment-427579018
It works for Surface Book 2 and Surface Pro 2017.
If you're using Surface Laptop, edit the baudrate to 1843200 and it will work too.
If /dev/ttyS4 doesn't exist, try /dev/ttyS0. (My Surface Laptop is the case)
2020 update: This post is already outdated. Please refer to latest linux-surface to see if problem got resolved.
mshw0084-rqst.py
#!/usr/bin/env python3
import json
import pprint
import crcmod
from argparse import ArgumentParser
from pathlib import Path
import serial
from serial import Serial
DEFAULT_DEVICE = '/dev/ttyS4'
CRC_FN = crcmod.predefined.mkCrcFun('crc-ccitt-false')
def setup_device(port):
# definition from DSDT
return Serial(
port=port,
baudrate=3000000,
bytesize=serial.EIGHTBITS,
parity=serial.PARITY_NONE,
stopbits=serial.STOPBITS_ONE,
rtscts=False,
dsrdtr=False,
timeout=0,
)
def crc(pld):
x = CRC_FN(bytes(pld))
return [x & 0xff, (x >> 0x08) & 0xff]
def to_int(bytes):
return int.from_bytes(bytes, byteorder='little')
class Counters:
PATH = Path(__file__).parent / '.counters.json'
@staticmethod
def load():
if Counters.PATH.is_file():
with open(Counters.PATH) as fd:
data = json.load(fd)
seq = data['seq']
cnt = data['cnt']
else:
seq = 0x00
cnt = 0x0000
return Counters(seq, cnt)
def __init__(self, seq, cnt):
self.seq = seq
self.cnt = cnt
def store(self):
with open(Counters.PATH, 'w') as fd:
data = {'seq': self.seq, 'cnt': self.cnt}
json.dump(data, fd)
def inc_seq(self):
self.seq = (self.seq + 1) & 0xFF
def inc_cnt(self):
self.cnt = (self.cnt + 1) & 0xFFFF
def inc(self):
self.inc_seq()
self.inc_cnt()
class Command:
def __init__(self, rtc, riid, rcid):
self.rtc = rtc
self.riid = riid
self.rcid = rcid
def _write_msg(self, dev, seq, cnt):
cnt_lo = cnt & 0xff
cnt_hi = (cnt >> 0x08) & 0xff
hdr = [0x80, 0x08, 0x00, seq]
pld = [0x80, self.rtc, 0x01, 0x00, self.riid, cnt_lo, cnt_hi, self.rcid]
msg = [0xaa, 0x55] + hdr + crc(hdr) + pld + crc(pld)
return dev.write(bytes(msg))
def _write_ack(self, dev, seq):
hdr = [0x40, 0x00, 0x00, seq]
msg = [0xaa, 0x55] + hdr + crc(hdr) + [0xff, 0xff]
return dev.write(bytes(msg))
def _read_ack(self, dev, exp_seq):
msg = bytes()
while len(msg) < 0x0A:
msg += dev.read(0x0A - len(msg))
print("received: {}".format(msg.hex()))
assert msg[0:2] == bytes([0xaa, 0x55])
assert msg[3:5] == bytes([0x00, 0x00])
assert msg[6:8] == bytes(crc(msg[2:-4]))
assert msg[8:] == bytes([0xff, 0xff])
mty = msg[2]
seq = msg[5]
if mty == 0x40:
assert seq == exp_seq
return mty == 0x04
def _read_msg(self, dev, cnt):
cnt_lo = cnt & 0xff
cnt_hi = (cnt >> 0x08) & 0xff
buf = bytes()
rem = 0x08 # begin with header length
while len(buf) < rem:
buf += dev.read(0x0400)
# if we got a header, validate it
if rem == 0x08 and len(buf) >= 0x08:
hdr = buf[0:8]
assert hdr[0:3] == bytes([0xaa, 0x55, 0x80])
assert hdr[-2:] == bytes(crc(hdr[2:-2]))
rem += hdr[3] + 10 # len(payload) + frame + crc
hdr = buf[0:8]
msg = buf[8:hdr[3]+10]
rem = buf[hdr[3]+10:]
print("received: {}".format(hdr.hex()))
print("received: {}".format(msg.hex()))
assert msg[0:8] == bytes([0x80, self.rtc, 0x00, 0x01, self.riid, cnt_lo, cnt_hi, self.rcid])
assert msg[-2:] == bytes(crc(msg[:-2]))
seq = hdr[5]
pld = msg[8:-2]
return seq, pld, rem
def _read_clean(self, dev, buf=bytes()):
buf += dev.read(0x0400) # make sure we're not missing some bytes
while buf:
# get header / detect message type
if len(buf) >= 0x08:
if buf[0:3] == bytes([0xaa, 0x55, 0x40]): # ACK
while len(buf) < 0x0A:
buf += dev.read(0x0400)
print("ignored ACK: {}".format(buf[:0x0a].hex()))
buf = bytes(buf[0x0a:])
elif buf[0:3] == bytes([0xaa, 0x55, 0x80]): # response
buflen = 0x0a + buf[3]
while len(buf) < buflen:
buf += dev.read(0x0400)
print("ignored MSG: {}".format(buf[:buflen].hex()))
buf = bytes(buf[buflen:])
elif buf[0:3] == bytes([0x4e, 0x00, 0x53]): # control message?
while len(buf) < 0x19:
buf += dev.read(0x0400)
print("ignored CTRL: {}".format(buf[:0x19].hex()))
buf = bytes(buf[0x19:])
else: # unknown
print("ignored unknown: {}".format(buf.hex()))
assert False
buf += dev.read(0x0400)
def run(self, dev, cnt):
self._read_clean(dev)
self._write_msg(dev, cnt.seq, cnt.cnt)
retry = self._read_ack(dev, cnt.seq)
# retry one time on com failure
if retry:
self._write_msg(dev, cnt.seq, cnt.cnt)
retry = self._read_ack(dev, cnt.seq)
if retry:
print('Communication failure: invalid ACK, try again')
return
try:
seq, pld, rem = self._read_msg(dev, cnt.cnt)
self._write_ack(dev, seq)
self._read_clean(dev, rem)
finally:
cnt.inc()
return self._handle_payload(pld)
def _handle_payload(self, pld):
return None
class Gbos(Command):
def __init__(self):
super().__init__(0x11, 0x00, 0x0d)
def _handle_payload(self, pld):
return {
'Base Status': hex(pld[0]),
}
class Psr(Command):
def __init__(self, bat):
super().__init__(0x02, bat, 0x0d)
def _handle_payload(self, pld):
return {
'Power Source': hex(to_int(pld[0:4])),
}
class Sta(Command):
def __init__(self, bat):
super().__init__(0x02, bat, 0x01)
def _handle_payload(self, pld):
return {
'Battery Status': hex(to_int(pld[0:4])),
}
class Bst(Command):
def __init__(self, bat):
super().__init__(0x02, bat, 0x03)
def _handle_payload(self, pld):
return {
'State': hex(to_int(pld[0:4])),
'Present Rate': hex(to_int(pld[4:8])),
'Remaining Capacity': hex(to_int(pld[8:12])),
'Present Voltage': hex(to_int(pld[12:16])),
}
class Bix(Command):
def __init__(self, bat):
super().__init__(0x02, bat, 0x02)
def _handle_payload(self, pld):
return {
'Revision': hex(pld[0]),
'Power Unit': hex(to_int(pld[1:5])),
'Design Capacity': hex(to_int(pld[5:9])),
'Last Full Charge Capacity': hex(to_int(pld[9:13])),
'Technology': hex(to_int(pld[13:17])),
'Design Voltage': hex(to_int(pld[17:21])),
'Design Capacity of Warning': hex(to_int(pld[21:25])),
'Design Capacity of Low': hex(to_int(pld[25:29])),
'Cycle Count': hex(to_int(pld[29:33])),
'Measurement Accuracy': hex(to_int(pld[33:37])),
'Max Sampling Time': hex(to_int(pld[37:41])),
'Min Sampling Time': hex(to_int(pld[41:45])),
'Max Averaging Interval': hex(to_int(pld[45:49])),
'Min Averaging Interval': hex(to_int(pld[49:53])),
'Capacity Granularity 1': hex(to_int(pld[53:57])),
'Capacity Granularity 2': hex(to_int(pld[57:61])),
'Model Number': pld[61:82].decode().rstrip('\0'),
'Serial Number': pld[82:93].decode().rstrip('\0'),
'Type': pld[93:98].decode().rstrip('\0'),
'OEM Information': pld[98:119].decode().rstrip('\0'),
}
class PrettyBat:
def __init__(self, bat):
self.bix = Bix(bat)
self.bst = Bst(bat)
def run(self, dev, cnt):
bix = self.bix.run(dev, cnt)
bst = self.bst.run(dev, cnt)
state = int(bst['State'], 0)
vol = int(bst['Present Voltage'], 0)
rem_cap = int(bst['Remaining Capacity'], 0)
full_cap = int(bix['Last Full Charge Capacity'], 0)
rate = int(bst['Present Rate'], 0)
bat_states = {
0: 'None',
1: 'Discharging',
2: 'Charging',
4: 'Critical',
5: 'Critical (Discharging)',
6: 'Critical (Charging)',
}
bat_state = bat_states[state]
bat_vol = vol / 1000
if full_cap <= 0:
bat_rem_perc = '<unavailable>'
else:
bat_rem_perc = "{}%".format(int(rem_cap / full_cap * 100))
if state == 0x00 or rate == 0:
bat_rem_life = '<unavailable>'
else:
bat_rem_life = "{:.2f}h".format(rem_cap / rate)
return {
'State': bat_state,
'Voltage': "{}V".format(bat_vol),
'Precentage': bat_rem_perc,
'Remaing ': bat_rem_life,
}
COMMANDS = {
'lid0.gbos': Gbos(),
'adp1._psr': Psr(0x01),
'bat1._sta': Sta(0x01),
'bat1._bst': Bst(0x01),
'bat1._bix': Bix(0x01),
'bat2._sta': Sta(0x02),
'bat2._bst': Bst(0x02),
'bat2._bix': Bix(0x02),
'bat1.pretty': PrettyBat(0x01),
'bat2.pretty': PrettyBat(0x02),
}
def main():
cli = ArgumentParser(description='Surface Book 2 / Surface Pro (2017) embedded controller requests.')
cli.add_argument('-d', '--device', default=DEFAULT_DEVICE, metavar='DEV', help='the UART device')
cli.add_argument('-c', '--cnt', type=lambda x: int(x, 0), help='overwrite CNT')
cli.add_argument('-s', '--seq', type=lambda x: int(x, 0), help='overwrite SEQ')
commands = cli.add_subparsers()
for cmd in COMMANDS.keys():
parser = commands.add_parser(cmd, help="run request '{}'".format(cmd.upper()))
parser.set_defaults(command=cmd)
args = cli.parse_args()
dev = setup_device(args.device)
cmd = COMMANDS.get(args.command)
cnt = Counters.load()
if args.seq is not None:
cnt.seq = args.seq
if args.cnt is not None:
cnt.cnt = args.cnt
try:
res = cmd.run(dev, cnt)
print()
pprint.pprint(res)
finally:
cnt.store()
if __name__ == '__main__':
main()
Pipfile
[[source]]
url = "https://pypi.org/simple"
verify_ssl = true
name = "pypi"
[packages]
crcmod = "*"
pyserial = "*"
[dev-packages]
pylint = "*"
virtualtype.py
#!/usr/bin/env python3
# Use this script with https://recolic.net/phy and https://recolic.net/phy2
# to avoid typing fucked numbers into page by hand.
# Fuck the chinese shits who prevent you from pasting password.
# E.x. Alibaba bitch
from pykeyboard import PyKeyboard
import time
def virtual_type_array(arrToType, noWait=False):
k = PyKeyboard()
if not noWait:
print('You have 5 seconds to ready for auto-typing.')
time.sleep(5)
for d in arrToType:
k.type_string(str(d))
k.tap_key(k.tab_key)
def _type(s):
k = PyKeyboard()
print('You have 5 seconds to ready for auto-typing.')
time.sleep(5)
k.type_string(str(s))
if __name__ == "__main__":
import sys
_type(sys.argv[1])
One-click enable bbr.
#!/bin/bash
uname -r | grep -E '^(4\.(1[^\.]|9))|5\.' > /dev/null
(( $? == 1 )) && echo 'Linux kernel version must >= 4.9' && exit 1
[[ `whoami` != root ]] && echo 'You must be root' && exit 1
lsmod | grep bbr > /dev/null
(( $? == 1 )) &&
modprobe tcp_bbr &&
echo "tcp_bbr" >> /etc/modules-load.d/modules.conf
echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf &&
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf &&
sysctl -p
sysctl net.ipv4.tcp_available_congestion_control
sysctl net.ipv4.tcp_congestion_control
sysctl net.ipv4.tcp_congestion_control | grep bbr > /dev/null && echo 'Success.' || echo 'Failed.'
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