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 ini-
              tialized, 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 3.25 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)