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Base: Add man pages for null/zero/full character devices

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Brendan Coles 2021-03-03 23:18:39 +00:00 • committed by Andreas Kling
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## Name
full - always full device
## Description
`/dev/full` is a character device which is always full.
Reading from `/dev/full` returns '\0' bytes and exits with status 0.
Writing to `/dev/full` fails with ENOSPC error.
To create it manually:
```sh
mknod /dev/full c 1 7
chmod 666 /dev/full
```
## Files
* /dev/full
## Examples
```sh
$ head -c 8 /dev/full | hexdump
00 00 00 00 00 00 00 00
```
## See also
* [`null`(4)](../man4/null.md)
* [`zero`(4)](../man4/zero.md)