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isastream - test a file descriptor

#include <stropts.h>

int isastream(int fildes);

The isastream() function determines if a file descriptor represents a STREAMS file. The fildes argument refers to an open file descriptor. Upon successful completion, isastream() returns 1 if fildes represents a STREAMS file, and 0 if it does not. Otherwise, -1 is return and errno is set to indicate the error. The isastream() function will fail if: EBADF See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

Interface Stability Standard

MT-Level MT-Safe

streamio (4I), attributes (7), standards (7)

STREAMS Programming Guide