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-rw-r--r--hurd/hurdchdir.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/hurd/hurdchdir.c b/hurd/hurdchdir.c
new file mode 100644
index 0000000000..ce839a102f
--- /dev/null
+++ b/hurd/hurdchdir.c
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+/* Change a port cell to a directory by looking up a name.
+ Copyright (C) 1999 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <errno.h>
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/port.h>
+#include <hurd/fd.h>
+#include <fcntl.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 (name[len - 2] == '/' && name[len - 1] == '.')
+ lookup = name;
+ else
+ {
+ char *n = alloca (len + 2);
+ 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;
+}