.help bfopen Sep86 imfort.bfio
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NAME
bfopen -- open a file for binary file i/o
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SYNOPSIS
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integer function bfopen (fname, acmode, advice)

character*(*)	fname		#I host name of file to be opened
integer		acmode		#I file access mode (1=RO,3=RW,5=NF)
integer		advice		#I type of access (1=random,2=seq.)
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DESCRIPTION
The \fIbfopen\fR procedure either opens an existing file for binary
file i/o (\fIacmode\fR 1=read-only or 3=read-write), or creates a new,
zero length file and opens it for binary file i/o with read-write
access mode (\fIacmode\fR 5=new-file).  The \fIadvice\fR parameter
controls the size of the internal file buffer allocated at open time.
The possible values are 1 (random access, small buffer), or 2 (sequential
access, large buffer); anything larger is taken to be the actual size
of the buffer.  Note that the size of the buffer must be an integral
multiple of the size of a disk block.
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RETURN VALUE
The BFIO file descriptor (\fIfd\fR) is returned as the function value if
the file is successfully opened, otherwise a negative value is returned.
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SEE ALSO
bfaloc, bfclos
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