ptsname, ptsname_r - get the name of the slave pseudoterminal
#include <stdlib.h>
char *ptsname(int
fd
);
int ptsname_r(int fd
, char
*buf
, size_t
buflen
);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
The ptsname() function returns the name of the slave
pseudoterminal device corresponding to the master referred to by the
file descriptor fd
.
The ptsname_r() function is the reentrant equivalent
of ptsname(). It returns the name of the slave
pseudoterminal device as a null-terminated string in the buffer pointed
to by buf
. The buflen
argument specifies the number of
bytes available in buf
.
ptsname() is provided in glibc since version 2.1.
For an explanation of the terms used in this section, see attributes(7).
Interface | Attribute | Value |
ptsname() | Thread safety | MT-Unsafe race:ptsname |
ptsname_r() | Thread safety | MT-Safe |
ptsname(): POSIX.1-2001, POSIX.1-2008.
ptsname() is part of the UNIX 98 pseudoterminal support (see pts(4)).
ptsname_r() is a Linux extension, that is proposed
for inclusion in the next major revision of POSIX.1 (Issue 8). 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.
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