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/* Support for opening stores named in URL syntax.
Copyright (C) 2001 Free Software Foundation, Inc.
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>
#include <stdlib.h>
static const struct store_class *
find_url_class (const char *name, const struct store_class *const *classes)
{
const struct store_class *const *cl;
const char *clname_end = strchr (name, ':');
if (clname_end == name || clname_end == 0)
return 0;
for (cl = classes ?: store_std_classes; *cl; cl++)
if (strlen ((*cl)->name) == (clname_end - name)
&& strncmp (name, (*cl)->name, (clname_end - name)) == 0)
return *cl;
return 0;
}
/* Similar to store_typed_open, but NAME must be in URL format,
i.e. a class name followed by a ':' and any type-specific name.
Store classes opened this way must strip off the "class:" prefix.
A leading ':' or no ':' at all is invalid syntax. */
error_t
store_url_open (const char *name, int flags,
const struct store_class *const *classes,
struct store **store)
{
const struct store_class *cl = find_url_class (name, classes);
if (cl == 0)
return EINVAL;
if (! cl->open)
/* CL cannot be opened. */
return EOPNOTSUPP;
return (*cl->open) (name, flags, classes, store);
}
static error_t
url_decode (struct store_enc *enc, const struct store_class *const *classes,
struct store **store)
{
const struct store_class *cl;
/* This is pretty bogus. We use decode.c's code just to validate
the generic format and extract the name from the data. */
struct store dummy, *dummyptr;
error_t dummy_create (mach_port_t port, int flags, size_t block_size,
const struct store_run *runs, size_t num_runs,
struct store **store)
{
*store = &dummy;
return 0;
}
struct store_enc dummy_enc = *enc;
error_t err = store_std_leaf_decode (&dummy_enc, &dummy_create, &dummyptr);
if (err)
return err;
/* Find the class matching this name. */
cl = find_url_class (dummy.name, classes);
free (dummy.name);
free (dummy.misc);
if (cl == 0)
return EINVAL;
/* Now that we have the class, we just punt to its own decode hook. */
return (!cl->decode ? EOPNOTSUPP : (*cl->decode) (enc, classes, store));
}
/* This class is only trivially different from the "typed" class when used
by name. Its real purpose is to decode file_get_storage_info results
that use the STORAGE_NETWORK type, for which the convention is that the
name be in URL format (i.e. "type:something"). */
const struct store_class store_url_open_class =
{
STORAGE_NETWORK, "url",
open: store_url_open,
decode: url_decode
};
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