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[[!meta copyright="Copyright © 1994, 1995, 1996, 1997, 1998, 1999, 2002, 2009
Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled [[GNU Free Documentation
License|/fdl]]."]]"""]]
[[!meta title="dir_lookup"]]
routine dir_lookup (
start_dir: file_t;
RPT
file_name: string_t;
flags: int;
mode: mode_t;
out do_retry: retry_type;
out retry_name: string_t;
out result: mach_port_send_t);
Translate a file name, following all symlinks. Upon return, if `do_retry` is
`FS_RETRY_MAGICAL` then `retry_name` specifies what to do, the list of
possibilities is documented in `<hurd/hurd_types.h>`; if `FS_RETRY_REAUTH`,
then `result` should be reauthenticated before being used. If `retry_name` is
the empty string and the retry type is `FS_RETRY_NORMAL`, then no further
[[`dir_lookup`|dir_lookup]] calls are required; `result` is the port to use.
Otherwise the [[`dir_lookup`|dir_lookup]] call should be repeated, sent to
`result` (or the reauthenticated port) with `retry_name` passed for
`file_name`. This call is required to be supported by all files (even
non-directories) if the filename is null, and should function in that case as a
re-open of the file.
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