miosix::FilesystemManager Class Reference

#include <file_access.h>

Public Member Functions
int	kmount (const char *path, intrusive_ref_ptr< FilesystemBase > fs)
int	umount (const char *path, bool force=false)
void	umountAll ()
ResolvedPath	resolvePath (std::string &path, bool followLastSymlink=true)

Static Public Member Functions
static FilesystemManager &	instance ()

Detailed Description

This class contains information on all the mounted filesystems

Member Function Documentation

FilesystemManager & miosix::FilesystemManager::instance ( )

static

Returns

the instance of the filesystem manager (singleton)

int miosix::FilesystemManager::kmount	(	const char *	path,
		intrusive_ref_ptr< FilesystemBase >	fs
	)

Low level mount operation, meant to be used only inside the kernel, and board support packages. It is the only mount operation that can mount the root filesystem.

Parameters

path	path where to mount the filesystem
fs	filesystem to mount. Ownership of the pointer is transferred to the FilesystemManager class

Returns

0 on success, a negative number on failure

ResolvedPath miosix::FilesystemManager::resolvePath	(	std::string &	path,
		bool	followLastSymlink = true
	)

Resolve a path to identify the filesystem it belongs

Parameters

path

an absolute path name, that must start with '/'. Note that this is an inout parameter, the string is modified so as to return the full resolved path. In particular, the returned string differs from the passed one by not containing useless path components, such as "/./" and "//", by not containing back path componenets ("/../"), and may be entirely different from the passed one if a symlink was encountered during name resolution. The use of an inout parameter is to minimize the number of copies of the path string, optimizing for speed and size in the common case, but also means that a copy of the original string needs to be made if the original has to be used later.

followLastSymlink

true if the symlink in the last path component (the one that does not end with a /, if it exists, has to be followed)

Returns

the resolved path

int miosix::FilesystemManager::umount	(	const char *	path,
		bool	force = false
	)

Unmounts a filesystem

Parameters

path	path to a filesytem
force	true to umount the filesystem even if busy

Returns

0 on success, or a negative number on error

void miosix::FilesystemManager::umountAll

(

)

Umount all filesystems, to be called before system shutdown or reboot

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The documentation for this class was generated from the following files:

• file_access.h
• file_access.cpp