1isastream(3C)            Standard C Library Functions            isastream(3C)
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NAME

6       isastream - test a file descriptor
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SYNOPSIS

9       #include <stropts.h>
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11       int isastream(int fildes);
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DESCRIPTION

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

19       Upon successful completion, isastream() returns 1 if fildes  represents
20       a  STREAMS  file,  and  0  if it does not.  Otherwise, −1 is return and
21       errno is set to indicate the error.
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ERRORS

24       The isastream() function will fail if:
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26       EBADF    The fildes argument is not a valid file descriptor.
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ATTRIBUTES

30       See attributes(5) for descriptions of the following attributes:
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35       ┌─────────────────────────────┬─────────────────────────────┐
36       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
37       ├─────────────────────────────┼─────────────────────────────┤
38       │Interface Stability          │Standard                     │
39       ├─────────────────────────────┼─────────────────────────────┤
40       │MT-Level                     │MT-Safe                      │
41       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

44       attributes(5), , standards(5), streamio(7I)
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47       STREAMS Programming Guide
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51SunOS 5.11                        24 Jul 2002                    isastream(3C)