Originální popis anglicky:
isatty - test for a terminal device
Návod, kniha: POSIX Programmer's Manual
#include <unistd.h>
int isatty(int
fildes);
The
isatty() function shall test whether
fildes, an open file
descriptor, is associated with a terminal device.
The
isatty() function shall return 1 if
fildes is associated with
a terminal; otherwise, it shall return 0 and may set
errno to indicate
the error.
The
isatty() function may fail if:
- EBADF
- The fildes argument is not a valid open file
descriptor.
- ENOTTY
- The fildes argument is not associated with a
terminal.
The following sections are informative.
None.
The
isatty() function does not necessarily indicate that a human being is
available for interaction via
fildes. It is quite possible that
non-terminal devices are connected to the communications line.
None.
None.
The Base Definitions volume of IEEE Std 1003.1-2001,
<unistd.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
