81 lines
2.4 KiB
Groff
81 lines
2.4 KiB
Groff
|
.\" Copyright (C) 2000 Jason Evans <jasone@canonware.com>.
|
||
|
|
.\" All rights reserved.
|
||
|
|
.\"
|
||
|
|
.\" Redistribution and use in source and binary forms, with or without
|
||
|
|
.\" modification, are permitted provided that the following conditions
|
||
|
|
.\" are met:
|
||
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
||
|
|
.\" notice(s), this list of conditions and the following disclaimer as
|
||
|
|
.\" the first lines of this file unmodified other than the possible
|
||
|
|
.\" addition of one or more copyright notices.
|
||
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
.\" notice(s), this list of conditions and the following disclaimer in
|
||
|
|
.\" the documentation and/or other materials provided with the
|
||
|
|
.\" distribution.
|
||
|
|
.\"
|
||
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
|
||
|
|
.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
|
||
|
|
.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
||
|
|
.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
||
|
|
.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
||
|
|
.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
||
|
|
.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
.\"
|
||
|
|
.\" $FreeBSD$
|
||
|
|
.Dd February 15, 2000
|
||
|
|
.Dt SEM_OPEN 3
|
||
|
|
.Os
|
||
|
|
.Sh NAME
|
||
|
|
.Nm sem_open ,
|
||
|
|
.Nm sem_close ,
|
||
|
|
.Nm sem_unlink
|
||
|
|
.Nd named semaphore operations
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.Fd #include <semaphore.h>
|
||
|
|
.Ft sem_t *
|
||
|
|
.Fn sem_open "const char *name" "int oflag" "..."
|
||
|
|
.Ft int
|
||
|
|
.Fn sem_close "sem_t *sem"
|
||
|
|
.Ft int
|
||
|
|
.Fn sem_unlink "const char *name"
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
The
|
||
|
|
.Fn sem_open ,
|
||
|
|
.Fn sem_close ,
|
||
|
|
and
|
||
|
|
.Fn sem_unlink
|
||
|
|
functions are not supported by this implementation.
|
||
|
|
.Sh RETURN VALUES
|
||
|
|
.Fn sem_open
|
||
|
|
returns SEM_FAILED and sets
|
||
|
|
.Va errno
|
||
|
|
to indicate an error.
|
||
|
|
.Fn sem_close
|
||
|
|
and
|
||
|
|
.Fn sem_unlink
|
||
|
|
return -1 and set
|
||
|
|
.Va errno
|
||
|
|
to indicate an error.
|
||
|
|
.Sh ERRORS
|
||
|
|
.Fn sem_open ,
|
||
|
|
.Fn sem_close ,
|
||
|
|
and
|
||
|
|
.Fn sem_unlink
|
||
|
|
will fail:
|
||
|
|
.Bl -tag -width Er
|
||
|
|
.It Bq Er ENOSYS
|
||
|
|
Function not supported by this implementation.
|
||
|
|
.El
|
||
|
|
.Sh STANDARDS
|
||
|
|
.Fn sem_open ,
|
||
|
|
.Fn sem_close ,
|
||
|
|
and
|
||
|
|
.Fn sem_unlink
|
||
|
|
conform to ISO/IEC 9945-1 ANSI/IEEE
|
||
|
|
.Pq Dq Tn POSIX
|
||
|
|
Std 1003.1 1996 Edition.
|