man pages section 3: Basic Library Functions

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Updated: July 2014
 
 

isastream(3C)

Name

isastream - test a file descriptor

Synopsis

#include <stropts.h>

int isastream(int fildes);

Description

The isastream() function determines if a file descriptor represents a STREAMS file. The fildes argument refers to an open file descriptor.

Return Values

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.

Errors

The isastream() function will fail if:

EBADF

The fildes argument is not a valid file descriptor.

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
MT-Level
MT-Safe
Standard

See Also

attributes(5), , standards(5), streamio(7I)

STREAMS Programming Guide