NAME
ptsname — get name
of the slave pseudo-terminal device
SYNOPSIS
char *ptsname(int fildes);
DESCRIPTION
The ptsname () function shall return the
name of the slave pseudo-terminal 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 and may set
errno.
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 (). The returned pointer
and the string content might also be invalidated if the calling thread is
terminated.
ERRORS
The ptsname () function may fail if:
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
See the RATIONALE section for posix_openpt(3).
FUTURE DIRECTIONS
None.
SEE ALSO
grantpt(3), open(3), posix_openpt(3), ttyname(3), unlockpt(3)
XBD <stdlib.h>
CHANGE HISTORY
First released in Issue 4, Version 2.
Issue 5
Moved from X/OPEN UNIX extension to BASE.
A note indicating that this function need not be reentrant is added to the DESCRIPTION.
Issue 7
Austin Group Interpretation 1003.1-2001 #156 is applied.
POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0468 [75] and XSH/TC1-2008/0469 [96] are applied.
POSIX.1-2008, Technical Corrigendum 2, XSH/TC2-2008/0298 [503], XSH/TC2-2008/0299 [656], and XSH/TC2-2008/0300 [503] are applied.