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In /dev/socket directory, if runs "ls -al" in adb, there is no file size information. I would like to know why there is no such information, in the condition that in other directories can show file size information?

Thanks.

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up vote 7 down vote accepted

Sockets and pipes represent Unix' way of inter process communication, and a communication channel has no point in having a size. Sockets are thus not seekable as in go to position x in the file.

Linux (which Android makes use of) has 7 file types:

  • Regular Files
  • Directories
  • Character  Device Files
  • Block Device Files
  • Local Domain Sockets
  • Named Pipes
  • Symbolic Links

See more here

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