Removes the specified named semaphore.

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

    Format

      #include  <semaphore.h>

      int sem_unlink  (const char *name);

1 - Argument

 name

    The name of the semaphore to remove.

2 - Description

    The sem_unlink function removes a semaphore named by the name
    string. If the semaphore is referenced by other processes, sem_
    unlink does not change the state of the semaphore.

    If other processes have the semaphore open when sem_unlink is
    called, the semaphore is not destroyed until all references to
    the semaphore have been destroyed by calls to sem_close. The sem_
    unlink function returns immediately; it does not wait until all
    references have been destroyed.

    Calls to sem_open to recreate or reconnect to the semaphore refer
    to a new semaphore after sem_unlink is called.

3 - Return Values

    0                  Successful completion. The function executes
                       the semaphore unlink operation.
    -1                 Indicates an error. The function sets errno to
                       one of the following values:

                       o  EACCESS - Permission is denied to unlink
                          the named semaphore.

                       o  ENAMETOOLONG - The length of the path
                          name exceeds PSEM_MAX_PATHNAME defined
                          in semaphore.h.

                       o  ENOENT - The named semaphore does not
                          exist.

                       o  EVMSERR - OpenVMS specific nontranslatable
                          error code.