[Linux] On Librem5 psutil crash

[nokernel]

Summary

• OS: Linux Librem5 PureOS amber-phone
• Architecture: arm64
• Psutil version: 5.8.0
• Python version: 3.8.6
• Type:crash

Description

Issues when using bpytop on Librem5 phone 1st I reported the issue there.

But looks like it's in psutil. I was able to hack it to work by changing psutil line 1455 with secsleft = int(int(energy_now) / int(power_now) * 3600)

Psutil does a / between int and bytes causing error and crash.

  File "/home/purism/.asdf/installs/python/3.8.6/lib/python3.8/site-packages/psutil/__init__.py", line 2288, in sensors_battery
    return _psplatform.sensors_battery()
  File "/home/purism/.asdf/installs/python/3.8.6/lib/python3.8/site-packages/psutil/_pslinux.py", line 1455, in sensors_battery
    secsleft = int(energy_now / power_now * 3600)
TypeError: unsupported operand type(s) for /: 'int' and 'bytes'

[asmca]

it also happens on other devices that shows 'current_now' item value NEGTIVE.

suse@suse-lc:$ uname -a
Linux suse-lc 4.19.71-arm64-desktop #1 SMP PREEMPT Thu Jul 15 14:18:15 CST 2021 aarch64 GNU/Linux
suse@suse-lc:$ cat /sys/class/power_supply/Battery/current_now
-634000

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As mentioned in : https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-class-power

the negtive value may means："Valid values: Represented in microamps. Negative values are used for discharging batteries,"

---

the problem is that "isdigit()" function failed on negtive number:
EX:

"5".isdigit()
True
"-5".isdigit()
False

above fix avoids using "isdigit()" function, it works.