pwrite

   Writes into a given position within a file without changing the
   file pointer.

   This function is supported on OpenVMS Integrity servers and
   Alpha only.

   Format

     #include  <unistd.h>

     ssize_t pwrite  (int file_desc, const void *buffer, size_t
                     nbytes, off_t offset);
 

Additional information available:

Arguments       Description     Return_Values