1TTYNAME(3)                 Linux Programmer's Manual                TTYNAME(3)
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NAME

6       ttyname, ttyname_r - return name of a terminal
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SYNOPSIS

9       #include <unistd.h>
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11       char *ttyname(int fd);
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13       int ttyname_r(int fd, char *buf, size_t buflen);
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DESCRIPTION

16       The  function  ttyname() returns a pointer to the null-terminated path‐
17       name of the terminal device that is open on the file descriptor fd,  or
18       NULL on error (for example, if fd is not connected to a terminal).  The
19       return value may point to static data, possibly overwritten by the next
20       call.   The function ttyname_r() stores this pathname in the buffer buf
21       of length buflen.
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RETURN VALUE

24       The function ttyname() returns a pointer to a pathname on success.   On
25       error,  NULL is returned, and errno is set appropriately.  The function
26       ttyname_r() returns 0 on success, and an error number upon error.
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ERRORS

29       EBADF  Bad file descriptor.
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31       ENOTTY File descriptor does not refer to a terminal device.
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33       ERANGE (ttyname_r()) buflen was too small to allow  storing  the  path‐
34              name.
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ATTRIBUTES

37   Multithreading (see pthreads(7))
38       The ttyname() function is not thread-safe.
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40       The ttyname_r() function is thread-safe.
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CONFORMING TO

43       4.2BSD, POSIX.1-2001.
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SEE ALSO

46       fstat(2), ctermid(3), isatty(3)
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COLOPHON

49       This  page  is  part of release 3.53 of the Linux man-pages project.  A
50       description of the project, and information about reporting  bugs,  can
51       be found at http://www.kernel.org/doc/man-pages/.
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55Linux                             2013-06-21                        TTYNAME(3)
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