aio_return - Online Linux Manual PageSection : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03

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NAMEaio_return − get return status of asynchronous I/O operation

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LIBRARYReal-time library (librt, −lrt)

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SYNOPSIS#include <aio.h>"ssize_t aio_return(struct aiocb *aiocbp);

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DESCRIPTIONThe aio_return() function returns the final return status for the asynchronous I/O request with control block pointed to by aiocbp. (See aio(7) for a description of the aiocb structure.) This function should be called only once for any given request, after aio_error(3) returns something other than EINPROGRESS.

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RETURN VALUEIf the asynchronous I/O operation has completed, this function returns the value that would have been returned in case of a synchronous read(2), write(2), fsync(2), or fdatasync(2), call. On error, −1 is returned, and errno is set to indicate the error. If the asynchronous I/O operation has not yet completed, the return value and effect of aio_return() are undefined.

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ERRORSEINVAL  aiocbp does not point at a control block for an asynchronous I/O request of which the return status has not been retrieved yet. ENOSYS  aio_return() is not implemented.

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VERSIONSThe aio_return() function is available since glibc 2.1.

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue aio_return() Thread safetyMT-Safe

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STANDARDSPOSIX.1-2001, POSIX.1-2008.

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EXAMPLESSee aio(7).

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SEE ALSOaio_cancel(3), aio_error(3), aio_fsync(3), aio_read(3), aio_suspend(3), aio_write(3), lio_listio(3), aio(7) 0

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