svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
aio_write(3)
AIO_WRITE(3) Linux Programmer's Manual AIO_WRITE(3)
NAME
aio_write - asynchronous write
SYNOPSIS
#include <aio.h>
int aio_write(struct aiocb *aiocbp);
Link with -lrt.
DESCRIPTION
The aio_write() function queues the I/O request described by the buffer
pointed to by aiocbp. This function is the asynchronous analog of
write(2). The arguments of the call
write(fd, buf, count)
correspond (in order) to the fields aio_fildes, aio_buf, and aio_nbytes
of the structure pointed to by aiocbp. (See aio(7) for a description
of the aiocb structure.)
If O_APPEND is not set, the data is written starting at the absolute
position aiocbp->aio_offset, regardless of the file offset. If O_AP‐
PEND is set, data is written at the end of the file in the same order
as aio_write() calls are made. After the call, the value of the file
offset is unspecified.
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 aio_error(3). The return
status of a completed I/O operation can be obtained aio_return(3).
Asynchronous notification of I/O completion can be obtained by setting
aiocbp->aio_sigevent appropriately; see sigevent(7) for details.
If _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 aiocbp->aio_reqprio.
The field aiocbp->aio_lio_opcode is ignored.
No data is written to a regular file beyond its maximum offset.
RETURN VALUE
On success, 0 is returned. On error, the request is not enqueued, -1
is returned, and errno is set appropriately. If an error is detected
only later, it will be reported via aio_return(3) (returns status -1)
and aio_error(3) (error status—whatever one would have gotten in errno,
such as EBADF).
ERRORS
EAGAIN Out of resources.
EBADF aio_fildes is not a valid file descriptor open for writing.
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.
EINVAL One or more of aio_offset, aio_reqprio, aio_nbytes are invalid.
ENOSYS aio_write() is not implemented.
VERSIONS
The aio_write() function is available since glibc 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see attrib‐
utes(7). allbox; lb lb lb l l l. Interface Attribute Value T{
aio_write() T} Thread safety MT-Safe
CONFORMING TO
POSIX.1-2001, POSIX.1-2008.
NOTES
It is a good idea to zero out the control block before use. The con‐
trol block must not be changed while the write operation is in
progress. The buffer area being written out must not be accessed dur‐
ing the operation or undefined results may occur. The memory areas in‐
volved must remain valid.
Simultaneous I/O operations specifying the same aiocb structure produce
undefined results.
SEE ALSO
aio_cancel(3), aio_error(3), aio_fsync(3), aio_read(3), aio_return(3),
aio_suspend(3), lio_listio(3), aio(7)
COLOPHON
This page is part of release 5.02 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
2017-09-15 AIO_WRITE(3)