tar cannot archive socket file

[myroad94]

Env:
Lineageos 17.1 2020-11-30 (Android 10)
tar version:

1|OnePlus3T:/ $ tar --version
toybox 0.8.0-android

Oneplus3T

Issue:
I had an openvpn app that had a socket file in its data directory.
tar could not archive it and stopped in error with. Example to reproduce just with tar:

130|OnePlus3T:/ # tar -cf /sdcard/test.tar /dev/socket/logd
removing leading '/' from member names
tar: unknown file type '140000'
1|OnePlus3T:/ # echo $?
1

Workaround: I uninstalled openvpn before doing backup all
Solution: socket file are not supposed to be archived. Maybe use an optional better tar:

1|OnePlus3T:/ $ /sbin/.magisk/busybox/tar --version
tar (busybox) 1.31.1-Magisk
1|OnePlus3T:/ # /sbin/.magisk/busybox/tar -cf /sdcard/test.tar /dev/socket/logd
tar: removing leading '/' from member names
tar: /dev/socket/logd: socket ignored
OnePlus3T:/ # echo $?
0