Figure 4.26. Summary of file access permission bits
| Constant | Description | Effect on regular file | Effect on directory |
|---|
| S_ISUID | set-user-ID | set effective user ID on execution | (not used) |
| S_ISGID | set-group-ID | if group-execute set then set effective group ID on execution; otherwise enable mandatory record locking (if supported) | set group ID of new files created in directory to group ID of directory |
| S_ISVTX | sticky bit | control caching of file contents (if supported) | restrict removal and renaming of files in directory |
| S_IRUSR | user-read | user permission to read file | user permission to read directory entries |
| S_IWUSR | user-write | user permission to write file | user permission to remove and create files in directory |
| S_IXUSR | user-execute | user permission to execute file | user permission to search for given pathname in directory |
| S_IRGRP | group-read | group permission to read file | group permission to read directory entries |
| S_IWGRP | group-write | group permission to write file | group permission to remove and create files in directory |
| S_IXGRP | group-execute | group permission to execute file | group permission to search for given pathname in directory |
| S_IROTH | other-read | other permission to read file | other permission to read directory entries |
| S_IWOTH | other-write | other permission to write file | other permission to remove and create files in directory |
| S_IXOTH | other-execute | other permission to execute file | other permission to search for given pathname in directory |
لطفا منتظر باشید ...
