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/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file. */
#ifndef LIBRARIES_NACL_IO_NACL_IO_H_
#define LIBRARIES_NACL_IO_NACL_IO_H_
#include <ppapi/c/pp_instance.h>
#include <ppapi/c/ppb.h>
#include "sdk_util/macros.h"
EXTERN_C_BEGIN
/**
* Initialize nacl_io.
*
* NOTE: If you initialize nacl_io with this constructor, you cannot
* use any mounts that require PPAPI; e.g. persistent storage, etc.
*/
void nacl_io_init();
/**
* Initialize nacl_io with PPAPI support.
*
* Usage:
* PP_Instance instance;
* PPB_GetInterface get_interface;
* nacl_io_init(instance, get_interface);
*
* If you are using the PPAPI C interface:
* |instance| is passed to your instance in the DidCreate function.
* |get_interface| is passed to your module in the PPP_InitializeModule
* function.
*
* If you are using the PPAPI C++ interface:
* |instance| can be retrieved via the pp::Instance::pp_instance() method.
* |get_interface| can be retrieved via
* pp::Module::Get()->get_browser_interface()
*/
void nacl_io_init_ppapi(PP_Instance instance,
PPB_GetInterface get_interface);
/**
* Mount a new filesystem type.
*
* This function is declared in <sys/mount.h>, but we document it here
* because nacl_io is controlled primarily through mount(2)/umount(2).
*
* Some parameters are dependent on the filesystem type being mounted.
*
* The |data| parameter, if used, is always parsed as a string of comma
* separated key-value pairs:
* e.g. "key1=param1,key2=param2"
*
*
* filesystem types:
* "memfs": An in-memory filesystem.
* source: Unused.
* data: Unused.
*
* "dev": A filesystem with various utility nodes. Some examples:
* "null": equivalent to /dev/null.
* "zero": equivalent to /dev/zero.
* "urandom": equivalent to /dev/urandom.
* "console[0-3]": logs to the JavaScript console with varying log
* levels.
* "tty": Posts a message to JavaScript, which will send a "message"
* event from this module's embed element.
* source: Unused.
* data: Unused.
*
* "html5fs": A filesystem that uses PPAPI FileSystem interface, which can be
* read in JavaScript via the HTML5 FileSystem API. This mount
* provides the use of persistent storage. Please read the
* documentation in ppapi/c/ppb_file_system.h for more information.
* source: Unused.
* data: A string of parameters:
* "type": Which type of filesystem to mount. Valid values are
* "PERSISTENT" and "TEMPORARY". The default is "PERSISTENT".
* "expected_size": The expected file-system size. Note that this does
* not request quota -- you must do that from JavaScript.
*
* "httpfs": A filesystem that reads from a URL via HTTP.
* source: The root URL to read from. All paths read from this filesystem
* will be appended to this root.
* e.g. If source == "http://example.com/path", reading from
* "foo/bar.txt" will attempt to read from the URL
* "http://example.com/path/foo/bar.txt".
* data: A string of parameters:
* "allow_cross_origin_requests": If "true", then reads from this
* filesystem will follow the CORS standard for cross-origin requests.
* See http://www.w3.org/TR/access-control.
* "allow_credentials": If "true", credentials are sent with cross-origin
* requests. If false, no credentials are sent with the request and
* cookies are ignored in the response.
* All other key/value pairs are assumed to be headers to use with
* HTTP requests.
*
* "passthroughfs": A filesystem that passes all requests through to the
* underlying NaCL calls. The primary use of this filesystem
* is to allow reading NMF resources.
* source: Unused.
* data: Unused.
*
*
* @param[in] source Depends on the filesystem type. See above.
* @param[in] target The absolute path to mount the filesystem.
* @param[in] filesystemtype The name of the filesystem type to mount. See
* above for examples.
* @param[in] mountflags Unused.
* @param[in] data Depends on the filesystem type. See above.
* @return 0 on success, -1 on failure (with errno set).
*
* int mount(const char* source, const char* target, const char* filesystemtype,
* unsigned long mountflags, const void *data) NOTHROW;
*/
EXTERN_C_END
#endif /* LIBRARIES_NACL_IO_NACL_IO_H_ */
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