NAME

isastream - test a file descriptor

 SYNOPSIS

#include <stropts.h>

int isastream(int fildes);

 DESCRIPTION

The isastream() function tests whether fildes, an open file descriptor, is associated with a STREAMS-based file.

 RETURN VALUE

Upon successful completion, isastream() returns 1 if fildes refers to a STREAMS-based file and 0 if not. Otherwise, isastream() returns -1 and sets errno to indicate the error.

 ERRORS

The isastream() function will fail if:

[EBADF]

The fildes argument is not a valid open file descriptor.

 EXAMPLES

None.

 APPLICATION USAGE

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

<stropts.h>.