Section: Linux Programmer's Manual (4)
null, zero - data sink
Data written to the
special files is discarded.
always return end of file (i.e.,
returns 0), whereas reads from
always return bytes containing zero ('\0' characters).
These devices are typically created by:
mknod -m 666 /dev/null c 1 3
mknod -m 666 /dev/zero c 1 5
chown root:root /dev/null /dev/zero
If these devices are not writable and readable for all users, many
programs will act strangely.
Since Linux 2.6.31,
are interruptible by signals.
(This change was made to help with bad latencies for large reads from
This page is part of release 5.10 of the Linux
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