ttyname - find pathname of terminal

Syntax

#include <unistd.h> char *ttyname(int fildes);

Description ttyname() returns a pointer to a string containing a null-terminated pathname of the

	terminal associated with file descriptor fildes. The return value may point to a static area that is overwritten at each call. The controlling terminal may have the following names: /dev/term/0000, ..., /dev/term/4096 (for block-mode terminals) /dev/pts/0, ..., /dev/pts/4096 (for rlogin access)
Return val.	Pointer to a string
			if successful.
	Null pointer		if an error occurs. errno is set to indicate the error.
Errors	ttyname() will fail if:
	EBADF ENOTTY	fildes is not a valid file descriptor. fildes does not point to a terminal.
Notes	ttyname() is executed only for POSIX files ttyname() is not thread-safe. Use the reentrant function ttyname_r() when needed.
See also	isatty(), ttyname_r(), unistd.h.