Development and Implementation of a File System for Gannet Virtual ...

whence : One of the following codes
Returns:
The new offset. In case of error, ((off_t)-1) is returned.
Description:
The lseek() function sets the file offset for the file description associated with
fildes as follows:
SEEK_SET Set offset to offset.
SEEK_CUR Add offset to current position.
SEEK_END Add offset to current file size.
7. mkdir() : Makes a directory.
Arguments:
int mkdir(const char *path, mode_t mode);
path : Pointer to name of the directory to create.
mode : Directory permission bits.
Returns:
Zero on success and -1 on failure.
If an error occurs, a code is stored in errno to identify the error.
Description:
The mkdir() function creates a new directory named path. The permission bits
are set from mode.
8. rmdir() : Removes a directory.
Arguments:
int rmdir(const char *path);
path : Pointer to the path name of the directory to remove.
Returns:
Zero on success and -1 on failure.
Description:
It removes an exist directory.
9. opendir() : Opens a directory.
Arguments:
DIR *opendir(const char *dirname);
dirname :Pointer to the name of the directory to read.
Returns:
A pointer for use with readdir() and closedir() or, if an error took place, NULL.
Description:
The opendir() function opens a directory stream corresponding to the directory
named in the dirname argument. The stream is positioned at the first entry.
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