1 #include <u.h> 2 #include <libc.h> 3 #include <auth.h> 4 #include <fcall.h> 5 #include <thread.h> 6 #include <9p.h> 7 8 /* 9 * simplistic permission checking. assume that 10 * each user is the leader of her own group. 11 */ 12 int hasperm(File * f,char * uid,int p)13hasperm(File *f, char *uid, int p) 14 { 15 int m; 16 17 m = f->mode & 7; /* other */ 18 if((p & m) == p) 19 return 1; 20 21 if(strcmp(f->uid, uid) == 0) { 22 m |= (f->mode>>6) & 7; 23 if((p & m) == p) 24 return 1; 25 } 26 27 if(strcmp(f->gid, uid) == 0) { 28 m |= (f->mode>>3) & 7; 29 if((p & m) == p) 30 return 1; 31 } 32 33 return 0; 34 } 35