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 aio_return 3C "31 Jan 2012" "Oracle Solaris 11.4" "Standard C Library Functions" .SH NAME aio_return \- retrieve return status of an asynchronous I/O operation .SH SYNOPSIS .LP .nf #include <aio.h> \fBssize_t\fR \fBaio_return\fR(\fBstruct aiocb *\fR\fIaiocbp\fR); .fi .SH DESCRIPTION .sp .LP The \fBaio_return()\fR function returns the return status associated with the \fBaiocb\fR structure referenced by the \fIaiocbp\fR argument. The return status for an asynchronous I/O operation is the value that would be returned by the corresponding \fBread\fR(2), \fBwrite\fR(2), or \fBfsync\fR(3C) function call. If the error status for the operation is equal to \fBEINPROGRESS\fR, then the return status for the operation is undefined. The \fBaio_return()\fR function may be called exactly once to retrieve the return status of a given asynchronous operation; thereafter, if the same \fBaiocb\fR structure is used in a call to \fBaio_return()\fR or \fBaio_error\fR(3C), an error may be returned. When the \fBaiocb\fR structure referred to by \fIaiocbp\fR is used to submit another asynchronous operation, then \fBaio_return()\fR may be successfully used to retrieve the return status of that operation. .SH RETURN VALUES .sp .LP If the asynchronous I/O operation has completed, then the return status, as described for \fBread\fR(2), \fBwrite\fR(2), and \fBfsync\fR(3C), is returned. If the asynchronous I/O operation has not yet completed, the results of \fBaio_return()\fR are undefined. .SH ERRORS .sp .LP The \fBaio_return()\fR function will fail if: .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 10n .rt The \fIaiocbp\fR argument does not refer to an asynchronous operation whose return status has not yet been retrieved. .RE .sp .ne 2 .mk .na \fB\fBENOSYS\fR\fR .ad .RS 10n .rt The \fBaio_return()\fR function is not supported by the system. .RE .SH USAGE .sp .LP The \fBaio_return()\fR function has a transitional interface for 64-bit file offsets. See \fBlf64\fR(7). .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 Async-Signal-Safe _ Standard See \fBstandards\fR(7). .TE .sp .SH SEE ALSO .sp .LP \fBclose\fR(2), \fBexec\fR(2), \fBexit\fR(2), \fBfork\fR(2), \fBlseek\fR(2), \fBread\fR(2), \fBwrite\fR(2), \fBaio_cancel\fR(3C), \fBaio_fsync\fR(3C), \fBaio_read\fR(3C), \fBfsync\fR(3C), \fBlio_listio\fR(3C), \fBaio.h\fR(3HEAD), \fBsignal.h\fR(3HEAD), \fBattributes\fR(7), \fBlf64\fR(7), \fBstandards\fR(7)