@node ctermid, posix
@subheading Syntax

@example
#include <unistd.h>

char *ctermid(char *s);
@end example

@subheading Description

This function returns the name of the current terminal device. Under MS-DOS,
this is always "con".

@subheading Return Value

If @var{s} is null, returns pointer to internal static string "con".
Otherwise, copies "con" to buffer pointed by @var{s}.


@subheading Portability

@portability !ansi, posix