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Diffstat (limited to 'sys/imfort/doc/bfchan.hlp')
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diff --git a/sys/imfort/doc/bfchan.hlp b/sys/imfort/doc/bfchan.hlp new file mode 100644 index 00000000..9641b971 --- /dev/null +++ b/sys/imfort/doc/bfchan.hlp @@ -0,0 +1,27 @@ +.help bfchan Sep86 imfort.bfio +.ih +NAME +bfchan -- return the kernel i/o channel of an open BFIO file +.ih +SYNOPSIS +.nf +integer function bfchan (fd) + +integer fd #I BFIO file descriptor of open file +.fi +.ih +DESCRIPTION +The \fIbfchan\fR procedure is used to get the i/o channel assigned to the +file at open time by the binary file driver in the IRAF kernel. +This may be used as input to the \fIzfiobf\fR binary file driver primitives +if the lowest possible level of binary file i/o is desired (short of talking +directly to the host system). The \fIzfiobf\fR procedures provide a direct +(unbuffered), block oriented, asynchronous binary file i/o interface. +.ih +RETURN VALUE +The i/o channel assigned to the file by the \fIzfiobf\fR binary file driver +at open time is returned as the function value. +.ih +SEE ALSO +The manual pages for the binary file driver. +.endhelp |