TTYNAME
TTYNAME
NAMESYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
ATTRIBUTES
CONFORMING TO
SEE ALSO
COLOPHON
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
|
EBADF |
Bad file descriptor. | ||
|
ENOTTY |
File descriptor does not refer to a terminal device. | ||
|
ERANGE |
(ttyname_r()) buflen was too small to allow storing the pathname. |
ATTRIBUTES
Multithreading
(see pthreads(7))
The ttyname() function is not thread-safe.
The ttyname_r() function is thread-safe.
CONFORMING TO
4.2BSD, POSIX.1-2001.
SEE ALSO
fstat(2), ctermid(3), isatty(3)
COLOPHON
This page is part of release 3.69 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man−pages/.
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