centos man page for ptsname_r

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, 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 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 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), pty(7)

COLOPHON
       This page is part of release 3.53 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/.

								    2013-06-21								PTSNAME(3)