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+'\" et
+.TH SEM_UNLINK "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.\"
+.SH NAME
+sem_unlink
+\(em remove a named semaphore
+.SH SYNOPSIS
+.LP
+.nf
+#include <semaphore.h>
+.P
+int sem_unlink(const char *\fIname\fP);
+.fi
+.SH DESCRIPTION
+The
+\fIsem_unlink\fR()
+function shall remove the semaphore named by the string
+.IR name .
+If the semaphore named by
+.IR name
+is currently referenced by other processes, then
+\fIsem_unlink\fR()
+shall have no effect on the state of the semaphore. If one or more
+processes have the semaphore open when
+\fIsem_unlink\fR()
+is called, destruction of the semaphore is postponed until all
+references to the semaphore have been destroyed by calls to
+\fIsem_close\fR(),
+\fI_exit\fR(),
+or
+.IR exec .
+Calls to
+\fIsem_open\fR()
+to recreate or reconnect to the semaphore refer to a new semaphore
+after
+\fIsem_unlink\fR()
+is called. The
+\fIsem_unlink\fR()
+call shall not block until all references have been destroyed; it
+shall return immediately.
+.SH "RETURN VALUE"
+Upon successful completion, the
+\fIsem_unlink\fR()
+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
+.IR errno
+to indicate the error.
+.SH ERRORS
+The
+\fIsem_unlink\fR()
+function shall fail if:
+.TP
+.BR EACCES
+Permission is denied to unlink the named semaphore.
+.TP
+.BR ENOENT
+The named semaphore does not exist.
+.P
+The
+\fIsem_unlink\fR()
+function may fail if:
+.TP
+.BR ENAMETOOLONG
+.br
+The length of the
+.IR name
+argument exceeds
+{_POSIX_PATH_MAX}
+on systems that do not support the XSI option
+or exceeds
+{_XOPEN_PATH_MAX}
+on XSI systems,
+or has a pathname component that is longer than
+{_POSIX_NAME_MAX}
+on systems that do not support the XSI option
+or longer than
+{_XOPEN_NAME_MAX}
+on XSI systems.
+A call to
+\fIsem_unlink\fR()
+with a
+.IR name
+argument that contains the same semaphore name as was previously used
+in a successful
+\fIsem_open\fR()
+call shall not give an
+.BR [ENAMETOOLONG] 
+error.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+A future version might require the
+\fIsem_open\fR()
+and
+\fIsem_unlink\fR()
+functions to have semantics similar to normal file system operations.
+.SH "SEE ALSO"
+.IR "\fIsemctl\fR\^(\|)",
+.IR "\fIsemget\fR\^(\|)",
+.IR "\fIsemop\fR\^(\|)",
+.IR "\fIsem_close\fR\^(\|)",
+.IR "\fIsem_open\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2017,
+.IR "\fB<semaphore.h>\fP"
+.\"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1-2017, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, 2018 Edition,
+Copyright (C) 2018 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 .
+.PP
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .