Hallo, dies ist ein Test.

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'\" te .\" Copyright (c) 2008, 2020, Oracle and/or its affiliates. .\" Copyright (c) 1989, AT&T. All rights reserved. .\" Portions Copyright (c) 1992, The X/Open Company Ltd. All rights reserved. .\" Oracle gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at http://www.opengroup.org/bookstore/. .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions 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. This notice shall appear on any product containing this material. .TH sem_close 3C "31 Jan 2012" "Oracle Solaris 11.4" "Standard C Library Functions" .SH NAME sem_close \- close a named semaphore .SH SYNOPSIS .LP .nf #include <semaphore.h> \fBint\fR \fBsem_close\fR(\fBsem_t *\fR\fIsem\fR); .fi .SH DESCRIPTION .sp .LP The \fBsem_close()\fR function is used to indicate that the calling process is finished using the named semaphore indicated by \fIsem\fR. The effects of calling \fBsem_close()\fR for an unnamed semaphore (one created by \fBsem_init\fR(3C)) are undefined. The \fBsem_close()\fR function deallocates (that is, make available for reuse by a subsequent \fBsem_open\fR(3C) by this process) any system resources allocated by the system for use by this process for this semaphore. The effect of subsequent use of the semaphore indicated by \fIsem\fR by this process is undefined. If the semaphore has not been removed with a successful call to \fBsem_unlink\fR(3C), then \fBsem_close()\fR has no effect on the state of the semaphore. If the \fBsem_unlink\fR(3C) function has been successfully invoked for \fIname\fR after the most recent call to \fBsem_open\fR(3C) with \fBO_CREAT\fR for this semaphore, then when all processes that have opened the semaphore close it, the semaphore is no longer be accessible. .SH RETURN VALUES .sp .LP If successful, \fBsem_close()\fR returns \fB0\fR, otherwise it returns \fB\(mi1\fR and sets \fBerrno\fR to indicate the error. .SH ERRORS .sp .LP The \fBsem_close()\fR function will fail if: .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 10n .rt The \fIsem\fR argument is not a valid semaphore descriptor. .RE .sp .ne 2 .mk .na \fB\fBENOSYS\fR\fR .ad .RS 10n .rt The \fBsem_close()\fR function is not supported by the system. .RE .SH USAGE .sp .LP The \fBsem_close()\fR function should not be called for an unnamed semaphore initialized by \fBsem_init\fR(3C). .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .TS tab( ) box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPE ATTRIBUTE VALUE _ Interface Stability Committed _ MT-Level MT-Safe _ Standard See \fBstandards\fR(7). .TE .sp .SH SEE ALSO .sp .LP \fBsem_init\fR(3C), \fBsem_open\fR(3C), \fBsem_unlink\fR(3C), \fBattributes\fR(7), \fBstandards\fR(7)