PTSNAME(P) POSIX Programmer's Manual PTSNAME(P)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 reentrant. A function that is not
required to be reentrant is not required to 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.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
The value returned may point to a static data area that is overwritten
by each call to ptsname().
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSOgrantpt() , open() , ttyname() , unlockpt() , the Base Definitions vol‐
ume of IEEE Std 1003.1-2001, <stdlib.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. 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.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 PTSNAME(P)
