SEM_OPEN(3)               OpenBSD Programmer's Manual              SEM_OPEN(3)

NAME
     sem_open, sem_close, sem_unlink - named semaphore operations

SYNOPSIS
     #include <semaphore.h>

     sem_t *
     sem_open(const char *name, int oflag, ...);

     int
     sem_close(sem_t *sem);

     int
     sem_unlink(const char *name);

DESCRIPTION
     The sem_open(), sem_close(), and sem_unlink() functions are not supported
     by this implementation.

RETURN VALUES
     sem_open() returns SEM_FAILED and sets errno to indicate an error.
     sem_close() and sem_unlink() return -1 and set errno to indicate an er-
     ror.

ERRORS
     sem_open(), sem_close(), and sem_unlink() will fail:

     [ENOSYS]      Function not supported by this implementation.

SEE ALSO
     sem_destroy(3), sem_getvalue(3), sem_init(3), sem_post(3), sem_wait(3)

STANDARDS
     sem_open(), sem_close(), and sem_unlink() conform to ISO/IEC 9945-1:1996
     (``POSIX'').

OpenBSD 4.0                    February 15, 2000                             1
