1 #include <u.h>
2 #include <libc.h>
3 #include <bio.h>
4 #include <auth.h>
5
6 /*
7 * see if user is in the group noworld, i.e., has all file
8 * priviledges masked with 770, and all directories with
9 * 771, before checking access rights
10 */
11 int
noworld(char * user)12 noworld(char *user)
13 {
14 Biobuf *b;
15 char *p;
16 int n;
17
18 b = Bopen("/adm/users", OREAD);
19 if(b == nil)
20 return 0;
21 while((p = Brdline(b, '\n')) != nil){
22 p[Blinelen(b)-1] = 0;
23 p = strchr(p, ':');
24 if(p == nil)
25 continue;
26 if(strncmp(p, ":noworld:", 9) == 0){
27 p += 9;
28 break;
29 }
30 }
31 n = strlen(user);
32 while(p != nil && *p != 0){
33 p = strstr(p, user);
34 if(p == nil)
35 break;
36 if(*(p-1) == ':' || *(p-1) == ',')
37 if(*(p+n) == ':' || *(p+n) == ',' || *(p+n) == 0){
38 Bterm(b);
39 return 1;
40 }
41 p++;
42 }
43 Bterm(b);
44 return 0;
45 }
46