/* Change a port cell to a directory by looking up a name. Copyright (C) 1999-2015 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 <unistd.h> #include <hurd.h> #include <hurd/port.h> #include <hurd/fd.h> #include <fcntl.h> #include <string.h> int _hurd_change_directory_port_from_name (struct hurd_port *portcell, const char *name) { size_t len; const char *lookup; file_t dir; /* Append trailing "/." to directory name to force ENOTDIR if it's not a directory and EACCES if we don't have search permission. */ len = strlen (name); if (len >= 2 && name[len - 2] == '/' && name[len - 1] == '.') lookup = name; else if (len == 0) /* Special-case empty file name according to POSIX. */ return __hurd_fail (ENOENT); else { char *n = alloca (len + 3); memcpy (n, name, len); n[len] = '/'; n[len + 1] = '.'; n[len + 2] = '\0'; lookup = n; } dir = __file_name_lookup (lookup, 0, 0); if (dir == MACH_PORT_NULL) return -1; _hurd_port_set (portcell, dir); return 0; }