Manual Section... (3) - page: isatty
NAMEisatty - test whether a file descriptor refers to a terminal
#include <unistd.h> int isatty(int fd);
DESCRIPTIONThe isatty() function tests whether fd is an open file descriptor referring to a terminal.
RETURN VALUEisatty() returns 1 if fd is an open file descriptor referring to a terminal; otherwise 0 is returned, and errno is set to indicate the error.
- fd is not a valid file descriptor.
- fd refers to a file other than a terminal. POSIX.1-2001 specifies the error ENOTTY for this case.
CONFORMING TOSVr4, 4.3BSD, POSIX.1-2001.
SEE ALSOfstat(2), ttyname(3)
COLOPHONThis page is part of release 3.24 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
This document was created by man2html, using the manual pages.
Time: 15:26:44 GMT, June 11, 2010