NAME    [Toc]    [Back]

     sem_open, sem_close, sem_unlink - named semaphore operations

SYNOPSIS    [Toc]    [Back]

     #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    [Toc]    [Back]

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

RETURN VALUES    [Toc]    [Back]

     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 error.

ERRORS    [Toc]    [Back]

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

     [ENOSYS]      Function not supported by this implementation.

STANDARDS    [Toc]    [Back]

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

OpenBSD     3.6                        February     15,      2000