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/* Support for opening `typed' stores
Copyright (C) 1997,98,2001 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.org>
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "store.h"
#include <string.h>
/* Open the store indicated by NAME, which should consist of a store type
name followed by a ':' and any type-specific name, returning the new store
in STORE. If NAME doesn't contain a `:', then it will be interpreted as
either a class name, if such a class occurs in CLASSES, or a filename,
which is opened by calling store_open on NAME; a `:' at the end or the
beginning of NAME unambiguously causes the remainder to be treated as a
class-name or a filename, respectively. CLASSES is used to select classes
specified by the type name; if it is 0, STORE_STD_CLASSES is used. */
error_t
store_typed_open (const char *name, int flags,
const struct store_class *const *classes,
struct store **store)
{
const struct store_class *const *cl;
const char *clname_end = strchr (name, ':');
if (clname_end == name)
/* Open NAME with store_open. */
return store_open (name + 1, flags, classes, store);
if (! clname_end)
clname_end = name + strlen (name);
if (! classes)
classes = store_std_classes;
for (cl = classes; *cl; cl++)
if (strlen ((*cl)->name) == (clname_end - name)
&& strncmp (name, (*cl)->name, (clname_end - name)) == 0)
break;
if (! *cl)
{
/* No class with the given name found. */
if (*clname_end)
/* NAME really should be a class name, which doesn't exist. */
return EINVAL;
else
/* Try opening NAME by querying it as a file instead. */
return store_open (name, flags, classes, store);
}
if (! (*cl)->open)
/* CL cannot be opened. */
return EOPNOTSUPP;
if (*clname_end)
/* Skip the ':' separating the class-name from the device name. */
clname_end++;
if (! *clname_end)
/* The class-specific portion of the name is empty, so make it *really*
empty. */
clname_end = 0;
return (*(*cl)->open) (clname_end, flags, classes, store);
}
const struct store_class
store_typed_open_class = { -1, "typed", open: store_typed_open };
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