ISATTY(3) | Linux Programmer's Manual | ISATTY(3) |
NAME
isatty - test whether a file descriptor refers to a terminalSYNOPSIS
#include<unistd.h>
int isatty(int fd );
DESCRIPTION
The isatty() function tests whether fd is an open file descriptor referring to a terminal.RETURN VALUE
isatty() 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.ERRORS
- EBADF
- fd is not a valid file descriptor.
- EINVAL
- fd refers to a file other than a terminal. POSIX.1-2001 specifies the error ENOTTY for this case.
CONFORMING TO
SVr4, 4.3BSD, POSIX.1-2001.SEE ALSO
fstat(2), ttyname(3)COLOPHON
This page is part of release 3.53 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/.2008-12-03 | Linux |