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| .TH AIO_FSYNC 3 2021-03-22 "" "Linux Programmer's Manual" |
| .SH NAME |
| aio_fsync \- asynchronous file synchronization |
| .SH SYNOPSIS |
| .nf |
| .B "#include <aio.h>" |
| .PP |
| .BI "int aio_fsync(int " op ", struct aiocb *" aiocbp ); |
| .PP |
| Link with \fI\-lrt\fP. |
| .fi |
| .SH DESCRIPTION |
| The |
| .BR aio_fsync () |
| function does a sync on all outstanding asynchronous I/O operations |
| associated with |
| .IR aiocbp\->aio_fildes . |
| (See |
| .BR aio (7) |
| for a description of the |
| .I aiocb |
| structure.) |
| .PP |
| More precisely, if |
| .I op |
| is |
| .BR O_SYNC , |
| then all currently queued I/O operations shall be |
| completed as if by a call of |
| .BR fsync (2), |
| and if |
| .I op |
| is |
| .BR O_DSYNC , |
| this call is the asynchronous analog of |
| .BR fdatasync (2). |
| .PP |
| Note that this is a request only; it does not wait for I/O completion. |
| .PP |
| Apart from |
| .IR aio_fildes , |
| the only field in the structure pointed to by |
| .I aiocbp |
| that is used by this call is the |
| .I aio_sigevent |
| field (a |
| .I sigevent |
| structure, described in |
| .BR sigevent (7)), |
| which indicates the desired type of asynchronous notification at completion. |
| All other fields are ignored. |
| .SH RETURN VALUE |
| On success (the sync request was successfully queued) |
| this function returns 0. |
| On error, \-1 is returned, and |
| .I errno |
| is set to indicate the error. |
| .SH ERRORS |
| .TP |
| .B EAGAIN |
| Out of resources. |
| .TP |
| .B EBADF |
| .I aio_fildes |
| is not a valid file descriptor open for writing. |
| .TP |
| .B EINVAL |
| Synchronized I/O is not supported for this file, or |
| .I op |
| is not |
| .B O_SYNC |
| or |
| .BR O_DSYNC . |
| .TP |
| .B ENOSYS |
| .BR aio_fsync () |
| is not implemented. |
| .SH VERSIONS |
| The |
| .BR aio_fsync () |
| function is available since glibc 2.1. |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .ad l |
| .nh |
| .TS |
| allbox; |
| lbx lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR aio_fsync () |
| T} Thread safety MT-Safe |
| .TE |
| .hy |
| .ad |
| .sp 1 |
| .SH CONFORMING TO |
| POSIX.1-2001, POSIX.1-2008. |
| .SH SEE ALSO |
| .BR aio_cancel (3), |
| .BR aio_error (3), |
| .BR aio_read (3), |
| .BR aio_return (3), |
| .BR aio_suspend (3), |
| .BR aio_write (3), |
| .BR lio_listio (3), |
| .BR aio (7), |
| .BR sigevent (7) |