full - always full device
File /dev/full has major device number 1 and minor device number 7.
Writes to the /dev/full device will fail with an ENOSPC error.
Reads from the /dev/full device will return \0 characters.
Seeks on /dev/full will always succeed.
If your system does not have /dev/full created already, it can be created
with the following commands:
mknod -m 666 /dev/full c 1 7
chown root:root /dev/full
mknod(1), null(4), zero(4)
Linux 1997-08-02 FULL(4)
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