projects / apple / xnu.git / blame
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|---|---|---|
| 2d21ac55 | 1 | .\" Copyright (c) 1980, 1991, 1993 |
| 9bccf70c A |
2 | .\" The Regents of the University of California. All rights reserved. |
| 3 | .\" | |
| 4 | .\" Redistribution and use in source and binary forms, with or without | |
| 5 | .\" modification, are permitted provided that the following conditions | |
| 6 | .\" are met: | |
| 7 | .\" 1. Redistributions of source code must retain the above copyright | |
| 8 | .\" notice, this list of conditions and the following disclaimer. | |
| 9 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
| 10 | .\" notice, this list of conditions and the following disclaimer in the | |
| 11 | .\" documentation and/or other materials provided with the distribution. | |
| 39037602 | 12 | .\" 3. Neither the name of the University nor the names of its contributors |
| 9bccf70c A |
13 | .\" may be used to endorse or promote products derived from this software |
| 14 | .\" without specific prior written permission. | |
| 15 | .\" | |
| 16 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 17 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 20 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 21 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 22 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 23 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 24 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 25 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 26 | .\" SUCH DAMAGE. | |
| 27 | .\" | |
| 2d21ac55 | 28 | .\" @(#)sticky.8 8.1 (Berkeley) 6/5/93 |
| 39037602 | 29 | .\" $FreeBSD$ |
| 9bccf70c | 30 | .\" |
| 2d21ac55 | 31 | .Dd June 5, 1993 |
| 39037602 A |
32 | .Dt STICKY 7 |
| 33 | .Os | |
| 9bccf70c | 34 | .Sh NAME |
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35 | .Nm sticky |
| 36 | .Nd sticky text and append-only directories | |
| 9bccf70c | 37 | .Sh DESCRIPTION |
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38 | A special file mode, called the |
| 39 | .Em sticky bit | |
| 40 | (mode S_ISVTX), | |
| 41 | is used to indicate special treatment | |
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42 | for directories. |
| 43 | It is ignored for regular files. | |
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44 | See |
| 45 | .Xr chmod 2 | |
| 46 | or | |
| 47 | the file | |
| 39037602 | 48 | .In sys/stat.h |
| 2d21ac55 | 49 | for an explanation of file modes. |
| 2d21ac55 A |
50 | .Sh STICKY DIRECTORIES |
| 51 | A directory whose `sticky bit' is set | |
| 52 | becomes an append-only directory, or, more accurately, | |
| 53 | a directory in which the deletion of files is restricted. | |
| 54 | A file in a sticky directory may only be removed or renamed | |
| 55 | by a user if the user has write permission for the directory and | |
| 56 | the user is the owner of the file, the owner of the directory, | |
| 57 | or the super-user. | |
| 58 | This feature is usefully applied to directories such as | |
| 59 | .Pa /tmp | |
| 60 | which must be publicly writable but | |
| 61 | should deny users the license to arbitrarily | |
| 62 | delete or rename each others' files. | |
| 63 | .Pp | |
| 64 | Any user may create a sticky directory. | |
| 65 | See | |
| 66 | .Xr chmod 1 | |
| 67 | for details about modifying file modes. | |
| 39037602 A |
68 | .Sh HISTORY |
| 69 | A | |
| 70 | .Nm | |
| 71 | command appeared in | |
| 72 | .At 32v . | |
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73 | .Sh BUGS |
| 74 | Neither | |
| 75 | .Xr open 2 | |
| 76 | nor | |
| 77 | .Xr mkdir 2 | |
| 78 | will create a file with the sticky bit set. |