99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
/* Copyright (C) 1991, 1992 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 <unistd.h>
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#include <hurd.h>
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/* Test for access to FILE by our real user and group IDs. */
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int
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DEFUN(__access, (file, type), CONST char *file AND int type)
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{
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error_t err;
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file_t crdir, cwdir, rcrdir, rcwdir, io;
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int dealloc_crdir, dealloc_cwdir;
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int flags;
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/* Set up _hurd_rid_auth. */
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__mutex_lock (&_hurd_idlock);
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if (!_hurd_id_valid)
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{
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if (_hurd_rid_auth != MACH_PORT_NULL)
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{
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__mach_port_deallocate (__mach_task_self (), _hurd_rid_auth);
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_hurd_rid_auth = MACH_PORT_NULL;
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}
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if (err = __auth_getids (_hurd_auth, &_hurd_id))
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goto lose;
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}
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if (_hurd_rid_auth == MACH_PORT_NULL)
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{
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idblock_t rid;
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rid = _hurd_id;
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/* XXX Should keep supplementary ids or not? */
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rid.uids[0] = rid.ruid;
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rid.gids[0] = rid.rgid;
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rid.ruid = _hurd_id.uids[0];
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rid.rgid = _hurd_id.gids[0];
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if (err = __auth_makeauth (_hurd_auth, &rid, &_hurd_rid_auth))
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goto lose;
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}
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crdir = _hurd_port_get (&_hurd_crdir, &dealloc_crdir);
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err = __io_reauthenticate (crdir);
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if (!err)
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{
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err = __auth_user_authenticate (_hurd_rid_auth, crdir, &rcrdir);
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__mach_port_deallocate (__mach_task_self (), crdir);
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}
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_hurd_port_free (crdir, &dealloc_crdir);
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cwdir = _hurd_port_get (&_hurd_cwdir, &dealloc_cwdir);
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err = __io_reauthenticate (cwdir);
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if (!err)
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{
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err = __auth_user_authenticate (_hurd_rid_auth, cwdir, &rcwdir);
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__mach_port_deallocate (__mach_task_self (), cwdir);
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}
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__mutex_unlock (&_hurd_idlock);
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_hurd_port_free (cwdir, &dealloc_cwdir);
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if (err)
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return __hurd_fail (err);
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flags = 0;
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if (type & R_OK)
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flags |= FS_LOOKUP_READ;
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if (type & W_OK)
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flags |= FS_LOOKUP_WRITE;
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if (type & X_OK)
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flags |= FS_LOOKUP_EXECUTE;
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err = __hurd_path_lookup (rcrdir, rcwdir, file, flags, 0, &io);
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__mach_port_deallocate (__mach_task_self (), rcrdir);
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__mach_port_deallocate (__mach_task_self (), rcwdir);
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if (err)
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return __hurd_fail (err);
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__mach_port_deallocate (__mach_task_self (), io);
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return 0;
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lose:
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__mutex_unlock (&_hurd_idlock);
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return __hurd_fail (err);
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}
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