| ISASTREAM(3C) | Standard C Library Functions | ISASTREAM(3C) |
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
| May 23, 2021 | OmniOS |