ttyname - phpMan

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 NUL-terminated pathname of the ter-
       minal 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  path-
       name 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
       Values stored in errno by a failing ttyname() or returned by a failing ttyname_r():

       EBADF  Bad file descriptor.

       ENOTTY File descriptor does not refer to a terminal device.

       ERANGE buflen was too small to allow storing the pathname.

CONFORMING TO
       POSIX.1

SEE ALSO
       fstat(2), isatty(3)



Linux                             2002-07-20                        TTYNAME(3)

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