linux man page for io_submit

IO_SUBMIT(2)						     Linux Programmer's Manual						      IO_SUBMIT(2)

NAME
       io_submit - submit asynchronous I/O blocks for processing

SYNOPSIS
       #include <libaio.h>

       int io_submit(aio_context_t ctx_id, long nr, struct iocb **iocbpp);

       Link with -laio.

DESCRIPTION
       io_submit()  queues  nr	I/O  request blocks for processing in the AIO context ctx_id.  iocbpp should be an array of nr AIO control blocks,
       which will be submitted to context ctx_id.

RETURN VALUE
       On success, io_submit() returns the number of iocbs submitted (which may be 0 if nr is zero).  For the failure return, see NOTES.

ERRORS
       EAGAIN Insufficient resources are available to queue any iocbs.

       EBADF  The file descriptor specified in the first iocb is invalid.

       EFAULT One of the data structures points to invalid data.

       EINVAL The aio_context specified by ctx_id is invalid.  nr is less than 0.  The iocb at *iocbpp[0] is  not  properly  initialized,  or  the
	      operation specified is invalid for the file descriptor in the iocb.

       ENOSYS io_submit() is not implemented on this architecture.

VERSIONS
       The asynchronous I/O system calls first appeared in Linux 2.5, August 2002.

CONFORMING TO
       io_submit() is Linux-specific and should not be used in programs that are intended to be portable.

NOTES
       Glibc does not provide a wrapper function for this system call.

       The  wrapper provided in libaio for io_submit() does not follow the usual C library conventions for indicating error: on error it returns a
       negated error number (the negative of one of the values listed in ERRORS).  If the system call is invoked via syscall(2), then  the  return
       value follows the usual conventions for indicating an error: -1, with errno set to a (positive) value that indicates the error.

SEE ALSO
       io_cancel(2), io_destroy(2), io_getevents(2), io_setup(2)

COLOPHON
       This  page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2008-06-18							      IO_SUBMIT(2)