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PTSNAME
Section: Linux Programmer's Manual (3)
Updated: 2008-09-03
Index
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NAME
ptsname, ptsname_r - get the name of the slave pseudo-terminal
SYNOPSIS
#define _XOPEN_SOURCE
#include <stdlib.h>
char *ptsname(int fd);
#define _GNU_SOURCE
#include <stdlib.h>
int ptsname_r(int fd, char *buf, size_t buflen);
DESCRIPTION
The
ptsname()
function returns the name of the slave pseudo-terminal (pty) device
corresponding to the master referred to by
fd.
The
ptsname_r()
function is the reentrant equivalent of
ptsname().
It returns the name of the slave pseudo-terminal device as a
null-terminated string in the buffer pointed to by
buf.
The
buflen
argument specifies the number of bytes available in
buf.
RETURN VALUE
On success,
ptsname()
returns a pointer to a string in static storage which will be
overwritten by subsequent calls.
This pointer must not be freed.
On failure, a NULL pointer is returned.
On success,
ptsname_r()
returns 0.
On failure, a nonzero value is returned
and
errno
is set to indicate the error.
ERRORS
- EINVAL
-
(ptsname_r()
only)
buf
is NULL.
- ENOTTY
-
fd
does not refer to a pseudo-terminal master device.
- ERANGE
-
(ptsname_r()
only)
buf
is too small.
VERSIONS
ptsname()
is provided in glibc since version 2.1.
CONFORMING TO
ptsname()
is part of the Unix98 pseudo-terminal support (see
pts(4)).
This function is specified in POSIX.1-2001.
ptsname_r()
is a Linux extension.
A version of this function is documented on Tru64 and HP-UX, but
on those implementations, -1 is returned on error, with
errno
set to indicate the error.
Avoid using this function in portable programs.
SEE ALSO
grantpt(3),
posix_openpt(3),
ttyname(3),
unlockpt(3),
pts(4),
feature_test_macros(7),
pty(7)
COLOPHON
This page is part of release 3.27 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- VERSIONS
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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