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isatty(3c) [opensolaris man page]

isatty(3C)						   Standard C Library Functions 						isatty(3C)

NAME
isatty - test for a terminal device SYNOPSIS
#include <unistd.h> int isatty(int fildes); DESCRIPTION
The isatty() function tests whether fildes, an open file descriptor, is associated with a terminal device. RETURN VALUES
The isatty() function returns 1 if fildes is associated with a terminal; otherwise it returns 0 and may set errno to indicate the error. ERRORS
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. USAGE
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. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
ttyname(3C), attributes(5), standards(5) SunOS 5.11 24 Jul 2002 isatty(3C)

Check Out this Related Man Page

ISATTY(3P)						     POSIX Programmer's Manual							ISATTY(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
isatty - test for a terminal device SYNOPSIS
#include <unistd.h> int isatty(int fildes); DESCRIPTION
The isatty() function shall test whether fildes, an open file descriptor, is associated with a terminal device. RETURN VALUE
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. ERRORS
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. EXAMPLES
None. APPLICATION USAGE
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. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
The Base Definitions volume of IEEE Std 1003.1-2001, <unistd.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- 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 . IEEE
/The Open Group 2003 ISATTY(3P)
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