31.5 ioctl
Function
With STREAMS, we again encounter the
ioctl function that was described in Chapter 17.
#include <stropts.h>
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int ioctl(int fd, int request, ... /* void *arg */ ) ;
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Returns: 0 if OK, 鈥? on error
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The only change from the function prototype
shown in Section 17.2 is the
headers that must be included when dealing with STREAMS.
There are about 30 requests that affect a stream
head. Each request begins with I_ and they are normally
documented on the streamio man page.
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