stat, fstat, fwstat, wstat - get and put file status

include "sys.m";
sys:= load Sys Sys->PATH;
fstat:  fn(fd: ref FD)          : (int, Dir);
fwstat: fn(fd: ref FD;  d: Dir) : int;
stat:   fn(name: string)        : (int, Dir);
wstat:  fn(name: string, d: Dir): int;

Description

Qid: adt 
{   
	path:  int;   
	vers:  int; 
}; 

Dir: adt 
{   
	name:   string;   
	uid:    string;   
	gid:    string;   
	qid:    Qid;   
	mode:   int;   
	atime:  int;   
	mtime:  int;   
	length: int;   
	dtype:  int;   
	dev:    int; 
};

File Mode Bits

16r80000000

Directory. The Sys module defines this as CHDIR.

8r400

Read permission by owner.

8r200

Write permission by owner.

8r100

Execute permission (search on directory) by owner

8r070

Read, write, execute (search) by group.

8r007

Read, write, execute (search) by others.

16r80000000	Directory. The Sys module defines this as CHDIR.
8r400	Read permission by owner.
8r200	Write permission by owner.
8r100	Execute permission (search on directory) by owner
8r070	Read, write, execute (search) by group.
8r007	Read, write, execute (search) by others.

Modifying File Attributes

Only some of the fields may be changed by wstat calls.


name	The name can be changed by anyone with write permission in the parent directory.
mode and mtime	The mode and mtime can be changed by the owner or the group leader of the file's current group.
gid	The gid can be changed by the owner.

Limbo System Module
dirread - read directory
open, create - open/create a file for reading or writing
stat, wstat - inquire or change file attributes in Chapter 3