| wkj | 7285a49 | 2004-06-17 01:47:21 +0000 | [diff] [blame] | 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | |
| 4 | /* |
| 5 | * /adm/users is |
| 6 | * id:user/group:head member:other members |
| 7 | * |
| 8 | * /etc/{passwd,group} |
| 9 | * name:x:nn:other stuff |
| 10 | */ |
| 11 | |
| 12 | static int isnumber(char *s); |
| 13 | |
| 14 | sniff(Biobuf *b) |
| 15 | { |
| 16 | read first line of file into p; |
| 17 | |
| 18 | nf = getfields(p, f, nelem(f), ":"); |
| 19 | if(nf < 4) |
| 20 | return nil; |
| 21 | |
| 22 | if(isnumber(f[0]) && !isnumber(f[2])) |
| 23 | return _plan9; |
| 24 | |
| 25 | if(!isnumber(f[0]) && isnumber(f[2])) |
| 26 | return _unix; |
| 27 | |
| 28 | return nil; |
| 29 | } |
| 30 | |
| 31 | |
| 32 | int |
| 33 | isnumber(char *s) |
| 34 | { |
| 35 | char *q; |
| 36 | |
| 37 | strtol(s, &q, 10); |
| 38 | return *q == '\0'; |
| 39 | } |
| 40 | |
| 41 | /* EOF */ |
