projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| e6817382 BJ |
1 | .TH DIR 5 |
| 2 | .SH NAME | |
| 3 | dir \- format of directories | |
| 4 | .SH SYNOPSIS | |
| 5 | .B #include <sys/types.h> | |
| 6 | .br | |
| 7 | .B #include <sys/dir.h> | |
| 8 | .SH DESCRIPTION | |
| 9 | A directory | |
| 10 | behaves exactly like an ordinary file, save that no | |
| 11 | user may write into a directory. | |
| 12 | The fact that a file is a directory is indicated by | |
| 13 | a bit in the flag word of its i-node entry | |
| 14 | see, | |
| 15 | .IR filsys (5). | |
| 16 | The structure of a directory entry as given in the | |
| 17 | include file is: | |
| 18 | .RS | |
| 19 | .ta 8n +10n | |
| 20 | .PP | |
| 21 | .nf | |
| 22 | .so /usr/include/sys/dir.h | |
| 23 | .fi | |
| 24 | .RE | |
| 25 | .PP | |
| 26 | By convention, the first two entries in each directory | |
| 27 | are for `\fB.\fR' and `\fB..\fR'. The first is an entry for the | |
| 28 | directory itself. The second is for the parent | |
| 29 | directory. | |
| 30 | The meaning of `\fB..\fR' is modified for the root directory | |
| 31 | of the master file system and for the root directories of removable | |
| 32 | file systems. | |
| 33 | In the first case, there is no parent, and in the second, | |
| 34 | the system does not permit off-device references. | |
| 35 | Therefore in both cases `\fB..\fR' has the | |
| 36 | same meaning as `\fB.\fR'. | |
| 37 | .SH "SEE ALSO" | |
| 38 | filsys(5) |