ptsname - name of pseudoterminal

Syntax

#include <stdlib.h> char *ptsname(int fildes);

Description  The ptsname() function returns the name of the slave pseudoterminal that is assigned to

	the master pseudoterminal. fildes is the file descriptor that references the master terminal. ptsname() returns a pointer to a string containing the pathname of the corresponding slave terminal. The name is terminated with the null byte. The name has the format /dev/pts/N, where N is an integer between 0 and 255. ptsname() is not thread-safe.
Return val.	Pointer to a string
		if successful. The string contains the name of the slave terminal.
	Null pointer	if an error occurs. This can happen if fildes is not a valid file descriptor or if the name of the slave terminal does not exist in the file system.
Notes See also	The pointer points to a static data area that is overwritten every time ptsname() is called. grantpt(), ttyname(), unlockpt(), stdlib.h.