@node _read, file system
@subheading Syntax

@example
#include <io.h>

ssize_t _read(int fildes, void *buf, size_t nbyte);
@end example

@subheading Description

This is a direct connection to the MS-DOS read function call, int
0x21, %ah = 0x3f.  No conversion is done on the data; it is read as
raw binary data. This function can be hooked by the
@xref{File System Extensions}. If you don't want this, you should
use @xref{_dos_read}.

@subheading Return Value

The number of bytes read.


@subheading Portability

@portability !ansi, !posix