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* sysdeps/mach/hurd/setuid.c: Rewrote ID frobnication to do the right thing. * sysdeps/mach/hurd/setgid.c: Likewise. * sysdeps/mach/hurd/setreuid.c: Likewise. * sysdeps/mach/hurd/setregid.c: Likewise. * sysdeps/mach/hurd/setegid.c: Likewise. * sysdeps/mach/hurd/seteuid.c: Likewise. * sysdeps/mach/hurd/fork.c: Peek __mach_task_self_ value before proc_dostop call to work around kernel paging bug. Thu Dec 21 12:19:32 1995 Miles Bader <miles@gnu.ai.mit.edu> * sysdeps/mach/hurd/setuid.c (__setuid): Actually add the new uid instead of putting it (and other uids) in the gids and leaving the old uids as is.
100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <hurd.h>
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#include <hurd/id.h>
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#include <string.h>
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/* Set the group ID of the calling process to UID.
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If the calling process is the super-user, the real
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and effective group IDs, and the saved set-group-ID to UID;
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if not, the effective group ID is set to GID. */
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int
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DEFUN(__setgid, (gid), gid_t gid)
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{
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auth_t newauth;
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error_t err;
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HURD_CRITICAL_BEGIN;
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__mutex_lock (&_hurd_id.lock);
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err = _hurd_check_ids ();
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if (!err)
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{
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/* Make a new auth handle which has GID as the real gid,
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and as the first element in the list of effective gids. */
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gid_t *newgen, *newaux, auxbuf[2];
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size_t ngen, naux;
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newaux = _hurd_id.aux.gids;
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naux = _hurd_id.aux.ngids;
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if (_hurd_id.gen.ngids == 0)
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{
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/* No effective gids now. The new set will be just GID. */
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newgen = &gid;
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ngen = 1;
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}
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else if (_hurd_id.gen.gids[0] == 0)
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{
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/* We are root; set the effective, real, and saved to GID. */
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_hurd_id.gen.gids[0] = gid;
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_hurd_id.valid = 0;
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newgen = _hurd_id.gen.gids;
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ngen = _hurd_id.gen.ngids;
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if (_hurd_id.aux.ngids < 2)
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{
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newaux = auxbuf;
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naux = 2;
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}
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_hurd_id.aux.gids[0] = _hurd_id.aux.gids[1] = gid;
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}
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else
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{
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/* We are not root; just change the effective GID. */
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_hurd_id.gen.gids[0] = gid;
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_hurd_id.valid = 0;
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newgen = _hurd_id.gen.gids;
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ngen = _hurd_id.gen.ngids;
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}
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err = __USEPORT (AUTH, __auth_makeauth
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(port, NULL, MACH_MSG_TYPE_COPY_SEND, 0,
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newgen, ngen, newaux, naux,
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_hurd_id.gen.gids, _hurd_id.gen.ngids,
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_hurd_id.aux.gids, _hurd_id.aux.ngids,
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&newauth));
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}
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__mutex_unlock (&_hurd_id.lock);
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HURD_CRITICAL_END;
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if (err)
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return __hurd_fail (err);
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/* Install the new handle and reauthenticate everything. */
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err = __setauth (newauth);
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__mach_port_deallocate (__mach_task_self (), newauth);
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return err;
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}
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weak_alias (__setgid, setgid)
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