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
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.
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 ALSO
grantpt(3) , open(3) , ttyname(3) , unlockpt(3) , the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <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.
End of informative text. footer end