Penguin
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Rev Author # Line
1 perry 1 NULL
2 !!!NULL
3 NAME
4 DESCRIPTION
5 NOTES
6 FILES
7 SEE ALSO
8 ----
9 !!NAME
10
11
12 null, zero - data sink
13 !!DESCRIPTION
14
15
16 Data written on a __null__ or __zero__ special file is
17 discarded.
18
19
20 Reads from the __null__ special file always return end of
21 file, whereas reads from __zero__ always return 0
22 characters.
23
24
25 __null__ and __zero__ are typically created
26 by:
27
28
29 mknod -m 666 /dev/null c 1 3
30 mknod -m 666 /dev/zero c 1 5
31 chown root:root /dev/null /dev/zero
32 !!NOTES
33
34
35 If these devices are not writable and readable for all
36 users, many programs will act strange.
37 !!FILES
38
39
40 ''/dev/null
41 /dev/zero''
42 !!SEE ALSO
43
44
45 chown(1), mknod(1)
46 ----
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