x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
PTSNAME(3) Linux Programmer's Manual PTSNAME(3)
NAME
ptsname, ptsname_r - get the name of the slave pseudoterminal
SYNOPSIS
#define _XOPEN_SOURCE /* See feature_test_macros(7) */
#include <stdlib.h>
char *ptsname(int fd);
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <stdlib.h>
int ptsname_r(int fd, char *buf, size_t buflen);
DESCRIPTION
The ptsname() function returns the name of the slave pseudoterminal
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 pseudoterminal device as a null-termi-
nated 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, NULL 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 pseudoterminal master device.
ERANGE (ptsname_r() only) buf is too small.
VERSIONS
ptsname() is provided in glibc since version 2.1.
ATTRIBUTES
Multithreading (see pthreads(7))
The ptsname() function is not thread-safe.
The ptsname_r() function is thread-safe.
CONFORMING TO
ptsname() is part of the UNIX 98 pseudoterminal support (see pts(4)).
This function is specified in POSIX.1-2001.
ptsname_r() is a Linux extension. A version of this function is docu-
mented on Tru64 and HP-UX, but on those implementations, -1 is returned
on error, with errno set to indicate the error. Avoid using this func-
tion in portable programs.
SEE ALSO
grantpt(3), posix_openpt(3), ttyname(3), unlockpt(3), pts(4), pty(7)
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/.
2013-06-21 PTSNAME(3)
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