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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "SEM_UNLINK" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" sem_unlink 
+.SH NAME
+sem_unlink \- remove a named semaphore (\fBREALTIME\fP)
+.SH SYNOPSIS
+.LP
+\fB#include <semaphore.h>
+.br
+.sp
+int sem_unlink(const char *\fP\fIname\fP\fB); \fP
+\fB
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIsem_unlink\fP() function shall remove the semaphore named by
+the string \fIname\fP. If the semaphore named by
+\fIname\fP is currently referenced by other processes, then \fIsem_unlink\fP()
+shall have no effect on the state of the
+semaphore. If one or more processes have the semaphore open when \fIsem_unlink\fP()
+is called, destruction of the semaphore is
+postponed until all references to the semaphore have been destroyed
+by calls to \fIsem_close\fP(), \fI_exit\fP(), or \fIexec\fP. Calls
+to \fIsem_open\fP() to recreate or reconnect
+to the semaphore refer to a new semaphore after \fIsem_unlink\fP()
+is called. The \fIsem_unlink\fP() call shall not block until
+all references have been destroyed; it shall return immediately.
+.SH RETURN VALUE
+.LP
+Upon successful completion, the \fIsem_unlink\fP() function shall
+return a value of 0. Otherwise, the semaphore shall not be
+changed and the function shall return a value of -1 and set \fIerrno\fP
+to indicate the error.
+.SH ERRORS
+.LP
+The \fIsem_unlink\fP() function shall fail if:
+.TP 7
+.B EACCES
+Permission is denied to unlink the named semaphore.
+.TP 7
+.B ENAMETOOLONG
+The length of the \fIname\fP argument exceeds {PATH_MAX} or a pathname
+component is longer than {NAME_MAX}.
+.TP 7
+.B ENOENT
+The named semaphore does not exist.
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+The \fIsem_unlink\fP() function is part of the Semaphores option and
+need not be available on all implementations.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIsemctl\fP() , \fIsemget\fP() , \fIsemop\fP()
+, \fIsem_close\fP() , \fIsem_open\fP() , the Base Definitions volume
+of
+IEEE\ Std\ 1003.1-2001, \fI<semaphore.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .