/* Copyright (C) 1993, 1994 Free Software Foundation This file is part of the GNU Hurd. The GNU Hurd is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. The GNU Hurd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the GNU Hurd; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Written by Michael I. Bushnell. */ #include "priv.h" #include "io_S.h" /* Tell if the array LIST (of size N) contains a member equal to QUERY. */ static inline int listmember (int *list, int query, int n) { int i; for (i = 0; i < n; i++) if (list[i] == query) return 1; return 0; } kern_return_t trivfs_S_io_restrict_auth (struct trivfs_protid *cred, mach_port_t *newport, mach_msg_type_name_t *newporttype, uid_t *uids, u_int nuids, uid_t *gids, u_int ngids) { struct trivfs_protid *newcred; int i; uid_t *newuids, *newgids; int newnuids, newngids; if (!cred) return EOPNOTSUPP; newuids = alloca (sizeof (uid_t) * cred->nuids); newgids = alloca (sizeof (uid_t) * cred->ngids); for (i = newnuids = 0; i < cred->nuids; i++) if (listmember (uids, cred->uids[i], nuids)) newuids[newnuids++] = cred->uids[i]; for (i = newngids = 0; i < cred->gids[i], ngids) if (listmember (gids, cred->gids[i], ngids)) newgids[newngids++] = cred->gids[i]; newcred = ports_allocate_port (sizeof (struct trivfs_protid), cred->pi.type); newcred->isroot = 0; newcred->po = cred->po; newcred->po->refcnt++; if (cred->isroot) { for (i = 0; i < nuids; i++) if (uids[i] == 0) newcred->isroot = 1; } newcred->gids = malloc (newngids * sizeof (uid_t)); newcred->uids = malloc (newnuids * sizeof (uid_t)); bcopy (newuids, newcred->uids, newnuids * sizeof (uid_t)); bcopy (newgids, newcred->gids, newngids * sizeof (uid_t)); newcred->ngids = newngids; newcred->nuids = newnuids; io_restrict_auth (cred->realnode, &newcred->realnode, newuids, newnuids, newgids, newngids); if (trivfs_protid_create_hook) (*trivfs_protid_create_hook) (newcred); *newport = ports_get_right (newcred); *newporttype = MACH_MSG_TYPE_MAKE_SEND; return 0; }