projects / thirdparty / man-pages.git / blame
| Commit | Line | Data |
|---|---|---|
| fea681da MK |
1 | .\" Copyright (c) 1993 Michael Haardt (michael@moria.de), Fri Apr 2 11:32:09 MET DST 1993 |
| 2 | .\" | |
| 3 | .\" This is free documentation; you can redistribute it and/or | |
| 4 | .\" modify it under the terms of the GNU General Public License as | |
| 5 | .\" published by the Free Software Foundation; either version 2 of | |
| 6 | .\" the License, or (at your option) any later version. | |
| 7 | .\" | |
| 8 | .\" The GNU General Public License's references to "object code" | |
| 9 | .\" and "executables" are to be interpreted as the output of any | |
| 10 | .\" document formatting or typesetting system, including | |
| 11 | .\" intermediate and printed output. | |
| 12 | .\" | |
| 13 | .\" This manual is distributed in the hope that it will be useful, | |
| 14 | .\" but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | .\" GNU General Public License for more details. | |
| 17 | .\" | |
| 18 | .\" You should have received a copy of the GNU General Public | |
| 19 | .\" License along with this manual; if not, write to the Free | |
| 20 | .\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, | |
| 21 | .\" USA. | |
| 22 | .\" | |
| 23 | .\" Modified Sat Jul 24 17:00:12 1993 by Rik Faith (faith@cs.unc.edu) | |
| 24 | .TH NULL 4 1992-11-21 "Linux" "Linux Programmer's Manual" | |
| 25 | .SH NAME | |
| 26 | null, zero \- data sink | |
| 27 | .SH DESCRIPTION | |
| 28 | Data written on a \fBnull\fP or \fBzero\fP special file is discarded. | |
| 29 | .PP | |
| 30 | Reads from the \fBnull\fP special file always return end of file, whereas | |
| 31 | reads from \fBzero\fP always return \e0 characters. | |
| 32 | .LP | |
| 33 | \fBnull\fP and \fBzero\fP are typically created by: | |
| 34 | .RS | |
| 35 | .sp | |
| 4d9b6984 | 36 | mknod \-m 666 /dev/null c 1 3 |
| fea681da | 37 | .br |
| 4d9b6984 | 38 | mknod \-m 666 /dev/zero c 1 5 |
| fea681da | 39 | .br |
| c6f59edf | 40 | chown root:root /dev/null /dev/zero |
| fea681da MK |
41 | .RE |
| 42 | .SH NOTES | |
| 43 | If these devices are not writable and readable for all users, many | |
| dde7d1a9 | 44 | programs will act strangely. |
| fea681da MK |
45 | .SH FILES |
| 46 | .I /dev/null | |
| 47 | .br | |
| 48 | .I /dev/zero | |
| 49 | .SH "SEE ALSO" | |
| 50 | .BR chown (1), | |
| c0ae5dbd MK |
51 | .BR mknod (1), |
| 52 | .BR full (4) |