приемник данных (data sink)
Имя (Name)
null, zero - data sink
Описание (Description)
Data written to the /dev/null and /dev/zero special files is
discarded.
Reads from /dev/null always return end of file (i.e., read(2)
returns 0), whereas reads from /dev/zero 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
Файлы (Files)
/dev/null
/dev/zero
Примечание (Note)
If these devices are not writable and readable for all users,
many programs will act strangely.
Since Linux 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.)
Смотри также (See also)
chown(1), mknod(1), full(4)
