opensolaris man page for ttyname_r

ttyname(3C)						   Standard C Library Functions 					       ttyname(3C)

NAME
       ttyname, ttyname_r - find pathname of a terminal

SYNOPSIS
       #include <unistd.h>

       char *ttyname(int fildes);

       char *ttyname_r(int fildes, char *name, int namelen);

   Standard conforming
       cc [ flag...] file ... -D_POSIX_PTHREAD_SEMANTICS [ library ... ]

       int ttyname_r(int fildes, char *name, size_t namesize);

DESCRIPTION
       The  ttyname()  function returns a pointer to a string containing the null-terminated path name of the terminal device associated with file
       descriptor fildes. The return value points to thread-specific data whose content is overwritten by each call from the same thread.

       The ttyname_r() function has the same functionality as ttyname() except that the caller must supply a buffer name with  length  namelen	to
       store  the result; this buffer must be at least _POSIX_PATH_MAX in size (defined in <limits.h>). The standard-conforming version (see stan-
       dards(5)) of ttyname_r() takes a namesize parameter of type size_t.

RETURN VALUES
       Upon successful completion, ttyname() and ttyname_r() return a pointer to a string. Otherwise, a null pointer is returned and errno is  set
       to indicate the error.

       The standard-conforming ttyname_r() returns 0 if successful or the error number upon failure.

ERRORS
       The ttyname() and ttyname_r() functions may fail if:

       EBADF	 The fildes argument is not a valid file descriptor. This condition is reported.

       ENOTTY	 The fildes argument does not refer to a terminal device. This condition is reported.

       The ttyname_r() function may fail if:

       ERANGE	 The value of namesize is smaller than the length of the string to be returned including the terminating null character.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       Intro(3), gettext(3C), setlocale(3C), attributes(5), standards(5)

NOTES
       When compiling multithreaded applications, see Intro(3), Notes On Multithreaded Applications.

       Messages printed from this function are in the native language specified by the LC_MESSAGES locale category. See setlocale(3C).

       The  return value of ttyname() points to thread-specific data whose content is overwritten by each call from the same thread. This function
       is safe to use in multithreaded applications, but its use is discouraged. The ttyname_r() function should used instead.

       Solaris 2.4 and earlier releases provided definitions of the ttyname_r() interface as specified in POSIX.1c Draft  6.  The  final  POSIX.1c
       standard  changed  the  interface as described above. Support for the Draft 6 interface is provided for compatibility only and might not be
       supported in future releases. New applications and libraries should use the standard-conforming interface.

SunOS 5.11							    31 Mar 2005 						       ttyname(3C)