| /* Test for access to file, relative to open directory. Hurd version. |
| Copyright (C) 2006-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stddef.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <hurd.h> |
| #include <hurd/fd.h> |
| |
| int |
| faccessat (fd, file, type, flag) |
| int fd; |
| const char *file; |
| int type; |
| int flag; |
| { |
| error_t err; |
| file_t port; |
| int allowed, flags; |
| |
| if ((flag & AT_EACCESS) == 0) |
| { |
| if (fd == AT_FDCWD || file[0] == '/') |
| return __access (file, type); |
| __set_errno (ENOTSUP); /* XXX later */ |
| return -1; |
| } |
| |
| port = __file_name_lookup_at (fd, flag &~ AT_EACCESS, file, 0, 0); |
| if (port == MACH_PORT_NULL) |
| return -1; |
| |
| /* Find out what types of access we are allowed to this file. */ |
| err = __file_check_access (port, &allowed); |
| __mach_port_deallocate (__mach_task_self (), port); |
| if (err) |
| return __hurd_fail (err); |
| |
| flags = 0; |
| if (type & R_OK) |
| flags |= O_READ; |
| if (type & W_OK) |
| flags |= O_WRITE; |
| if (type & X_OK) |
| flags |= O_EXEC; |
| |
| if (flags & ~allowed) |
| /* We are not allowed all the requested types of access. */ |
| return __hurd_fail (EACCES); |
| |
| return 0; |
| } |