Deletes the specified file.
#include <unistd.h> int unlink ( const char *path);
(IN) Points to a string containing the path of the file.
If successful, returns 0. Otherwise, returns a -1 and sets errno to one of the following:
A file marked for deletion is not actually erased by unlink until the space it occupies is needed by another file.
The caller must have Delete rights to the file.