| rsc | be8b315 | 2004-06-17 03:27:35 +0000 | [diff] [blame] | 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | #include <auth.h> |
| 4 | |
| 5 | /* |
| 6 | * become the authenticated user |
| 7 | */ |
| 8 | int |
| 9 | auth_chuid(AuthInfo *ai, char *ns) |
| 10 | { |
| 11 | int rv, fd; |
| 12 | |
| 13 | if(ai == nil || ai->cap == nil){ |
| 14 | werrstr("no capability"); |
| 15 | return -1; |
| 16 | } |
| 17 | |
| 18 | /* change uid */ |
| 19 | fd = open("#¤/capuse", OWRITE); |
| 20 | if(fd < 0){ |
| 21 | werrstr("opening #¤/capuse: %r"); |
| 22 | return -1; |
| 23 | } |
| 24 | rv = write(fd, ai->cap, strlen(ai->cap)); |
| 25 | close(fd); |
| 26 | if(rv < 0){ |
| 27 | werrstr("writing %s to #¤/capuse: %r", ai->cap); |
| 28 | return -1; |
| 29 | } |
| 30 | |
| 31 | /* get a link to factotum as new user */ |
| 32 | fd = open("/srv/factotum", ORDWR); |
| 33 | if(fd >= 0) |
| 34 | mount(fd, -1, "/mnt", MREPL, ""); |
| 35 | |
| 36 | /* set up new namespace */ |
| 37 | return newns(ai->cuid, ns); |
| 38 | } |
