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    The following form allows you to view linux man pages.

    Command:

    isatty

    
    
    

    SYNOPSIS

           #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 ter-
           minal; 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  speci-
                  fies the error ENOTTY for this case.
    
    
    

    ATTRIBUTES

       Multithreading (see pthreads(7))
           The isatty() function is thread-safe.
    
    
    

    CONFORMING TO

           SVr4, 4.3BSD, POSIX.1-2001.
    
    
    

    SEE ALSO

           fstat(2), ttyname(3)
    
    
    

    Linux 2014-01-27 ISATTY(3)

    
    
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