osx man page for sem_unlink

SEM_UNLINK(2)						      BSD System Calls Manual						     SEM_UNLINK(2)

NAME
     sem_unlink -- remove a named semaphore

SYNOPSIS
     #include <semaphore.h>

     int
     sem_unlink(const char *name);

DESCRIPTION
     The named semaphore named name is removed.  If the semaphore is in use by other processes, then name is immediately disassociated with the
     semaphore, but the semaphore itself will not be removed until all references to it have been closed.  Subsequent calls to sem_open() using
     name will refer to or create a new semaphore named name.

     If successful, sem_unlink() will return 0.  Otherwise, -1 is returned and errno is set, and the state of the semaphore is unchanged.

ERRORS
     sem_unlink() succeeds unless:

     [EACCES]		Permission is denied to be remove the semaphore.

     [ENAMETOOLONG]	name exceeded SEM_NAME_LEN characters.

     [ENOENT]		The named semaphore does not exist.

SEE ALSO
     sem_close(2), sem_open(2), semctl(2), semget(2), semop(2)

HISTORY
     sem_unlink() is specified in the POSIX Realtime Extension (1003.1b-1993/1003.1i-1995).

Darwin								   June 8, 2000 							    Darwin