| 1 | /* $Cambridge: exim/src/src/routers/rf_get_ugid.c,v 1.1 2004/10/07 13:10:02 ph10 Exp $ */ |
| 2 | |
| 3 | /************************************************* |
| 4 | * Exim - an Internet mail transport agent * |
| 5 | *************************************************/ |
| 6 | |
| 7 | /* Copyright (c) University of Cambridge 1995 - 2004 */ |
| 8 | /* See the file NOTICE for conditions of use and distribution. */ |
| 9 | |
| 10 | #include "../exim.h" |
| 11 | #include "rf_functions.h" |
| 12 | |
| 13 | |
| 14 | /************************************************* |
| 15 | * Get uid/gid for a router * |
| 16 | *************************************************/ |
| 17 | |
| 18 | /* This function is called by routers to sort out the uid/gid values which are |
| 19 | passed with an address for use by local transports. |
| 20 | |
| 21 | Arguments: |
| 22 | rblock the router block |
| 23 | addr the address being worked on |
| 24 | ugid pointer to a ugid block to fill in |
| 25 | |
| 26 | Returns: TRUE if all goes well, else FALSE |
| 27 | */ |
| 28 | |
| 29 | BOOL |
| 30 | rf_get_ugid(router_instance *rblock, address_item *addr, ugid_block *ugid) |
| 31 | { |
| 32 | struct passwd *upw = NULL; |
| 33 | |
| 34 | /* Initialize from fixed values */ |
| 35 | |
| 36 | ugid->uid = rblock->uid; |
| 37 | ugid->gid = rblock->gid; |
| 38 | ugid->uid_set = rblock->uid_set; |
| 39 | ugid->gid_set = rblock->gid_set; |
| 40 | ugid->initgroups = rblock->initgroups; |
| 41 | |
| 42 | /* If there is no fixed uid set, see if there's a dynamic one that can |
| 43 | be expanded and possibly looked up. */ |
| 44 | |
| 45 | if (!ugid->uid_set && rblock->expand_uid != NULL) |
| 46 | { |
| 47 | if (route_find_expanded_user(rblock->expand_uid, rblock->name, US"router", |
| 48 | &upw, &(ugid->uid), &(addr->message))) ugid->uid_set = TRUE; |
| 49 | else return FALSE; |
| 50 | } |
| 51 | |
| 52 | /* Likewise for the gid */ |
| 53 | |
| 54 | if (!ugid->gid_set && rblock->expand_gid != NULL) |
| 55 | { |
| 56 | if (route_find_expanded_group(rblock->expand_gid, rblock->name, US"router", |
| 57 | &(ugid->gid), &(addr->message))) ugid->gid_set = TRUE; |
| 58 | else return FALSE; |
| 59 | } |
| 60 | |
| 61 | /* If a uid is set, then a gid must also be available; use one from the passwd |
| 62 | lookup if it happened. */ |
| 63 | |
| 64 | if (ugid->uid_set && !ugid->gid_set) |
| 65 | { |
| 66 | if (upw != NULL) |
| 67 | { |
| 68 | ugid->gid = upw->pw_gid; |
| 69 | ugid->gid_set = TRUE; |
| 70 | } |
| 71 | else |
| 72 | { |
| 73 | addr->message = string_sprintf("user set without group for %s router", |
| 74 | rblock->name); |
| 75 | return FALSE; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | return TRUE; |
| 80 | } |
| 81 | |
| 82 | /* End of rf_get_ugid.c */ |