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TTYNAME(3)                 Linux Programmer's Manual                TTYNAME(3)

NAME
       ttyname, ttyname_r - return name of a terminal
SYNOPSIS
       #include <unistd.h>
       char *ttyname(int fd);
       int ttyname_r(int fd, char *buf, size_t buflen);
DESCRIPTION
       The  function  ttyname() returns a pointer to the null-terminated path-
       name of the terminal device that is open on the file descriptor fd,  or
       NULL on error (for example, if fd is not connected to a terminal).  The
       return value may point to static data, possibly overwritten by the next
       call.   The function ttyname_r() stores this pathname in the buffer buf
       of length buflen.
RETURN VALUE
       The function ttyname() returns a pointer to a pathname on success.   On
       error,  NULL is returned, and errno is set appropriately.  The function
       ttyname_r() returns 0 on success, and an error number upon error.
ERRORS
       EBADF  Bad file descriptor.
       ENOTTY File descriptor does not refer to a terminal device.
       ERANGE (ttyname_r()) buflen was too small to allow  storing  the  path-
              name.
ATTRIBUTES
   Multithreading (see pthreads(7))
       The ttyname() function is not thread-safe.
       The ttyname_r() function is thread-safe.
CONFORMING TO
       4.2BSD, POSIX.1-2001.
SEE ALSO
       fstat(2), ctermid(3), isatty(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/.

Linux                             2013-06-21                        TTYNAME(3)