Linux manual pages Section 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 pathname 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

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

4.2BSD, POSIX.1-2001.

SEE ALSO

fstat(2), isatty(3)

COLOPHON

This page is part of release 3.24 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/.