$ cd /tmp
$ nc -dUl ./././///sock &
[3] 6324
$ ls sock /tmp/sock ./sock
./sock  /tmp/sock  sock
$ lsof sock /tmp/sock ./sock
[nothing]
$ lsof ./././///sock
COMMAND  PID USER   FD   TYPE             DEVICE SIZE/OFF   NODE NAME
nc      6324  XXX    3u  unix 0xffff9f9faab76000      0t0 175260 ./././///sock type=STREAM

$ cd /tmp
$ nc -dUl ./././///sock &
$ mv sock SOCK
$ nc -U ./././///sock
nc: unix connect failed: No such file or directory
$ nc -U SOCK
[connected OK]
$ lsof ./././///sock
lsof: status error on ./././///sock: No such file or directory
[stupid junk snipped]
$ lsof -aUp $!
COMMAND  PID USER   FD   TYPE             DEVICE SIZE/OFF   NODE NAME
nc      6315  XXX    3u  unix 0xffff9f9e9b165800      0t0 173768 ./././sock type=STREAM
$ lsof SOCK