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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
commit3d08cd331c1adcf0d917392f7e527b3f00511748 (patch)
tree312f0d1e1632f48862f044b8bb87e602dcffb5f9 /man3/aio_write.3
parentAdding debian version 6.7-2. (diff)
downloadmanpages-3d08cd331c1adcf0d917392f7e527b3f00511748.tar.xz
manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.zip
Merging upstream version 6.8.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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-'\" t
-.\" Copyright (c) 2003 Andries Brouwer (aeb@cwi.nl)
-.\"
-.\" SPDX-License-Identifier: GPL-2.0-or-later
-.\"
-.TH aio_write 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-aio_write \- asynchronous write
-.SH LIBRARY
-Real-time library
-.RI ( librt ", " \-lrt )
-.SH SYNOPSIS
-.nf
-.B "#include <aio.h>"
-.P
-.BI "int aio_write(struct aiocb *" aiocbp );
-.fi
-.SH DESCRIPTION
-The
-.BR aio_write ()
-function queues the I/O request described by the buffer pointed to by
-.IR aiocbp .
-This function is the asynchronous analog of
-.BR write (2).
-The arguments of the call
-.P
-.in +4n
-.EX
-write(fd, buf, count)
-.EE
-.in
-.P
-correspond (in order) to the fields
-.IR aio_fildes ,
-.IR aio_buf ,
-and
-.I aio_nbytes
-of the structure pointed to by
-.IR aiocbp .
-(See
-.BR aio (7)
-for a description of the
-.I aiocb
-structure.)
-.P
-If
-.B O_APPEND
-is not set, the data is written starting at the
-absolute position
-.IR aiocbp\->aio_offset ,
-regardless of the file offset.
-If
-.B O_APPEND
-is set, data is written at the end of the file in the same order as
-.BR aio_write ()
-calls are made.
-After the call, the value of the file offset is unspecified.
-.P
-The "asynchronous" means that this call returns as soon as the
-request has been enqueued; the write may or may not have completed
-when the call returns.
-One tests for completion using
-.BR aio_error (3).
-The return status of a completed I/O operation can be obtained
-.BR aio_return (3).
-Asynchronous notification of I/O completion can be obtained by setting
-.I aiocbp\->aio_sigevent
-appropriately; see
-.BR sigevent (3type)
-for details.
-.P
-If
-.B _POSIX_PRIORITIZED_IO
-is defined, and this file supports it,
-then the asynchronous operation is submitted at a priority equal
-to that of the calling process minus
-.IR aiocbp\->aio_reqprio .
-.P
-The field
-.I aiocbp\->aio_lio_opcode
-is ignored.
-.P
-No data is written to a regular file beyond its maximum offset.
-.SH RETURN VALUE
-On success, 0 is returned.
-On error, the request is not enqueued, \-1
-is returned, and
-.I errno
-is set to indicate the error.
-If an error is detected only later, it will
-be reported via
-.BR aio_return (3)
-(returns status \-1) and
-.BR aio_error (3)
-(error status\[em]whatever one would have gotten in
-.IR errno ,
-such as
-.BR EBADF ).
-.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 EFBIG
-The file is a regular file, we want to write at least one byte,
-but the starting position is at or beyond the maximum offset for this file.
-.TP
-.B EINVAL
-One or more of
-.IR aio_offset ,
-.IR aio_reqprio ,
-.I aio_nbytes
-are invalid.
-.TP
-.B ENOSYS
-.BR aio_write ()
-is not implemented.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface Attribute Value
-T{
-.na
-.nh
-.BR aio_write ()
-T} Thread safety MT-Safe
-.TE
-.SH STANDARDS
-POSIX.1-2008.
-.SH HISTORY
-glibc 2.1.
-POSIX.1-2001.
-.SH NOTES
-It is a good idea to zero out the control block before use.
-The control block must not be changed while the write operation
-is in progress.
-The buffer area being written out
-.\" or the control block of the operation
-must not be accessed during the operation or undefined results may occur.
-The memory areas involved must remain valid.
-.P
-Simultaneous I/O operations specifying the same
-.I aiocb
-structure produce undefined results.
-.SH SEE ALSO
-.BR aio_cancel (3),
-.BR aio_error (3),
-.BR aio_fsync (3),
-.BR aio_read (3),
-.BR aio_return (3),
-.BR aio_suspend (3),
-.BR lio_listio (3),
-.BR aio (7)