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Man page of TTYNAME
TTYNAME
Section: Linux Programmer's Manual (3)
Updated: 2016-12-12
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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
- 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
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
ttyname()
| Thread safety | MT-Unsafe race:ttyname
|
|
ttyname_r()
| Thread safety | MT-Safe
|
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, 4.2BSD.
SEE ALSO
tty(1),
fstat(2),
ctermid(3),
isatty(3)
COLOPHON
This page is part of release 4.09 of the Linux
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A description of the project,
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and the latest version of this page,
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Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- ATTRIBUTES
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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