diff options
Diffstat (limited to 'hurd/fchroot.c')
| -rw-r--r-- | hurd/fchroot.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/hurd/fchroot.c b/hurd/fchroot.c index cfb8ae339d..ad9fdc46b5 100644 --- a/hurd/fchroot.c +++ b/hurd/fchroot.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. +/* Copyright (C) 1999, 2001 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 @@ -17,14 +17,34 @@ Boston, MA 02111-1307, USA. */ #include <unistd.h> + #include <hurd.h> #include <hurd/fd.h> -#include <fcntl.h> +#include <hurd/port.h> /* Change the current root directory to FD. */ int fchroot (int fd) { - return _hurd_change_directory_port_from_fd (&_hurd_ports[INIT_PORT_CRDIR], - fd); + error_t err; + file_t dir; + + err = HURD_DPORT_USE (fd, + ({ + dir = __file_name_lookup_under (port, ".", 0, 0); + dir == MACH_PORT_NULL ? errno : 0; + })); + + if (! err) + { + file_t root; + + /* Prevent going through DIR's .. */ + err = __file_reparent (dir, MACH_PORT_NULL, &root); + __mach_port_deallocate (__mach_task_self (), dir); + if (! err) + _hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], root); + } + + return err ? __hurd_fail (err) : 0; } |