− data sink
Data written to
the /dev/null and /dev/zero special files is
/dev/null always return end of file (i.e.,
read(2) returns 0), whereas reads from
/dev/zero always return bytes containing zero ('\0'
are typically created by:
666 /dev/null c 1 3
mknod −m 666 /dev/zero c 1 5
chown root:root /dev/null /dev/zero
devices are not writable and readable for all users, many
programs will act strangely.
2.6.31, reads from /dev/zero are interruptible by
signals. (This change was made to help with bad latencies
for large reads from /dev/zero.)
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