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 3.23 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/.

openSUSE Logo

Contents