NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | CONFORMING TO | SEE ALSO | COLOPHON
PTSNAME(3) Linux Programmer's Manual PTSNAME(3)
ptsname, ptsname_r - get the name of the slave pseudo-terminal
#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);
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.
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 non-zero value is returned
and errno is set to indicate the error.
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.
ptsname() is provided in glibc since version 2.1.
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.
grantpt(3), posix_openpt(3), ttyname(3), unlockpt(3), pts(4),
feature_test_macros(7), pty(7)
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/.
2008-09-03 PTSNAME(3)