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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), aio(7)

COLOPHON

       This page is part of release 3.35 of the Linux man-pages project.  A  description  of  the
       project,  and information about reporting bugs, can be found at http://man7.org/linux/man-
       pages/.