bsd/man/man2/aio_error.2

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  27 .Dd June 2, 1999
  28 .Dt AIO_ERROR 2
  29 .Os
  30 .Sh NAME
  31 .Nm aio_error
  32 .Nd retrieve error status of asynchronous I/O operation (REALTIME)
  33 .Sh LIBRARY
  34 .Lb libc
  35 .Sh SYNOPSIS
  36 .In aio.h
  37 .Ft int
  38 .Fn aio_error "const struct aiocb *iocb"
  39 .Sh DESCRIPTION
  40 The
  41 .Fn aio_error
  42 system call returns the error status of the asynchronous I/O request
  43 associated with the structure pointed to by
  44 .Fa iocb .
  45 .Sh RETURN VALUES
  46 If the asynchronous I/O request has completed successfully,
  47 .Fn aio_error
  48 returns 0.  If the request has not yet completed,
  49 .Er EINPROGRESS
  50 is returned.  If the request has completed unsuccessfully the error
  51 status is returned as described in
  52 .Xr read 2 ,
  53 .Xr write 2 ,
  54 or
  55 .Xr fsync 2
  56 is returned.
  57 On failure,
  58 .Fn aio_error
  59 returns
  60 .Dv -1
  61 and sets
  62 .Dv errno
  63 to indicate the error condition.
  64 .Sh ERRORS
  65 The
  66 .Fn aio_error
  67 system call will fail if:
  68 .Bl -tag -width Er
  69 .It Bq Er EINVAL
  70 The
  71 .Fa iocb
  72 argument
  73 does not reference an outstanding asynchronous I/O request.
  74 .El
  75 .Sh SEE ALSO
  76 .Xr aio_cancel 2 ,
  77 .Xr aio_read 2 ,
  78 .Xr aio_return 2 ,
  79 .Xr aio_suspend 2 ,
  80 .Xr aio_write 2 ,
  81 .Xr fsync 2 ,
  82 .Xr read 2 ,
  83 .Xr write 2 ,
  84 .Xr aio 4
  85 .Sh STANDARDS
  86 The
  87 .Fn aio_error
  88 system call
  89 is expected to conform to the
  90 .St -p1003.1
  91 standard.
  92 .Sh HISTORY
  93 The
  94 .Fn aio_error
  95 system call first appeared in
  96 .Fx 3.0 .
  97 .Sh AUTHORS
  98 This
  99 manual page was written by
 100 .An Wes Peters Aq wes@softweyr.com .