PTSNAME(3P) POSIX Programmer's Manual PTSNAME(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAMEptsname — get name of the slave pseudo-terminal device
SYNOPSIS
#include <stdlib.h>
char *ptsname(int fildes);
DESCRIPTION
The ptsname() function shall return the name of the slave pseudo-termi‐
nal device associated with a master pseudo-terminal device. The fildes
argument is a file descriptor that refers to the master device. The
ptsname() function shall return a pointer to a string containing the
pathname of the corresponding slave device.
The ptsname() function need not be thread-safe.
RETURN VALUE
Upon successful completion, ptsname() shall return a pointer to a
string which is the name of the pseudo-terminal slave device. Upon
failure, ptsname() shall return a null pointer. This could occur if
fildes is an invalid file descriptor or if the slave device name does
not exist in the file system.
The application shall not modify the string returned. The returned
pointer might be invalidated or the string content might be overwritten
by a subsequent call to ptsname().
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
See the RATIONALE section for posix_openpt().
FUTURE DIRECTIONS
None.
SEE ALSOgrantpt(), open(), posix_openpt(), ttyname(), unlockpt()
The Base Definitions volume of POSIX.1‐2008, <stdlib.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.ker‐
nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 PTSNAME(3P)
