1 2277c5d7 2004-03-21 devnull #include <u.h>
 2 2277c5d7 2004-03-21 devnull #include <libc.h>
 3 2277c5d7 2004-03-21 devnull #include <auth.h>
 4 2277c5d7 2004-03-21 devnull #include <fcall.h>
 5 2277c5d7 2004-03-21 devnull #include <thread.h>
 6 2277c5d7 2004-03-21 devnull #include <9p.h>
 7 2277c5d7 2004-03-21 devnull 
 8 2277c5d7 2004-03-21 devnull /*
 9 2277c5d7 2004-03-21 devnull  * simplistic permission checking.  assume that
10 2277c5d7 2004-03-21 devnull  * each user is the leader of her own group.
11 2277c5d7 2004-03-21 devnull  */
12 2277c5d7 2004-03-21 devnull int
13 2277c5d7 2004-03-21 devnull hasperm(File *f, char *uid, int p)
14 2277c5d7 2004-03-21 devnull {
15 2277c5d7 2004-03-21 devnull 	int m;
16 2277c5d7 2004-03-21 devnull 
17 2277c5d7 2004-03-21 devnull 	m = f->dir.mode & 7;	/* other */
18 2277c5d7 2004-03-21 devnull 	if((p & m) == p)
19 2277c5d7 2004-03-21 devnull 		return 1;
20 2277c5d7 2004-03-21 devnull 
21 2277c5d7 2004-03-21 devnull 	if(strcmp(f->dir.uid, uid) == 0) {
22 2277c5d7 2004-03-21 devnull 		m |= (f->dir.mode>>6) & 7;
23 2277c5d7 2004-03-21 devnull 		if((p & m) == p)
24 2277c5d7 2004-03-21 devnull 			return 1;
25 2277c5d7 2004-03-21 devnull 	}
26 2277c5d7 2004-03-21 devnull 
27 2277c5d7 2004-03-21 devnull 	if(strcmp(f->dir.gid, uid) == 0) {
28 2277c5d7 2004-03-21 devnull 		m |= (f->dir.mode>>3) & 7;
29 2277c5d7 2004-03-21 devnull 		if((p & m) == p)
30 2277c5d7 2004-03-21 devnull 			return 1;
31 2277c5d7 2004-03-21 devnull 	}
32 2277c5d7 2004-03-21 devnull 
33 2277c5d7 2004-03-21 devnull 	return 0;
34 2277c5d7 2004-03-21 devnull }