TTYNAME

Section: Linux Programmer's Manual (3)
Updated: 2002-07-20
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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

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

4.2BSD, POSIX.1-2001.  

SEE ALSO

fstat(2), isatty(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
SEE ALSO

linux.jgfs.net manual pages