Current Working Directory

Current Working Directory. More...

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Detailed Description

Current Working Directory.

The current working directory (CWD) is a per-process structure to track the current location in the filesystem for the process.

Data Structures
struct	cwd_t

Functions
void	cwd_init (cwd_t *cwd)
	Initialize a CWD structure.
void	cwd_deinit (cwd_t *cwd)
	Deinitialize a CWD structure.
path_t	cwd_get (cwd_t *cwd, namespace_t *ns)
	Get the current working directory.
void	cwd_set (cwd_t *cwd, const path_t *newPath)
	Set the current working directory.
void	cwd_clear (cwd_t *cwd)
	Clear the current working directory.

Function Documentation

cwd_init()

void cwd_init

(

cwd_t *

cwd

)

Initialize a CWD structure.

Will by default lazily resolve to the root path of the namespace until set to another path.

Parameters

cwd	The CWD structure to initialize.

Definition at line 6 of file cwd.c.

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cwd_deinit()

void cwd_deinit

(

cwd_t *

cwd

)

Deinitialize a CWD structure.

Parameters

cwd	The CWD structure to deinitialize.

Definition at line 12 of file cwd.c.

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cwd_get()

path_t cwd_get	(	cwd_t *	cwd,
		namespace_t *	ns
	)

Get the current working directory.

Note

If the cwd has not been set, this will return the root path of the namespace. This is to solve a circular dependency where the kernel process needs to be initialized before the vfs.

Parameters

cwd	The CWD structure.
ns	The namespace to get the root path from if the cwd is not set.

Returns

The current working directory path.

Definition at line 19 of file cwd.c.

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cwd_set()

void cwd_set	(	cwd_t *	cwd,
		const path_t *	newPath
	)

Set the current working directory.

Parameters

cwd	The CWD structure.
newPath	The new current working directory.

Definition at line 39 of file cwd.c.

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cwd_clear()

void cwd_clear

(

cwd_t *

cwd

)

Clear the current working directory.

Needed as a process might have its working directory inside its own /proc/[pid] directory which, since that directory holds references to the process itself, would result in a memory leak.

Parameters

cwd	The CWD structure.

Definition at line 46 of file cwd.c.

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