File Descriptor

Functions
int	fd_new (void)
struct dfs_fd *	fd_get (int fd)
void	fd_put (struct dfs_fd *fd)
int	fd_is_open (const char *pathname)

---

Function Documentation

int fd_new

(

void

)

This function will allocate a file descriptor.

Returns:

-1 on failed or the allocated file descriptor.

struct dfs_fd* fd_get

(

int

fd

)

[read]

This function will return a file descriptor structure according to file descriptor.

Returns:

NULL on on this file descriptor or the file descriptor structure pointer.

void fd_put

(

struct dfs_fd *

fd

)

This function will put the file descriptor.

int fd_is_open

(

const char *

pathname

)

This function will return whether this file has been opend.

Parameters:

pathname

the file path name.

Returns:

0 on file has been open successfully, -1 on open failed.