More jhbuilding of gnome-vfs CVS HEAD on opensolaris:

gnome-vfs-pty.c: In function `_gnome_vfs_pty_run_on_pty':
gnome-vfs-pty.c:311: warning: implicit declaration of function `login_tty'
gnome-vfs-pty.c:311: warning: nested extern declaration of `login_tty'

The relevant section of code is

#ifdef HAVE_UTMP_H
	/* This sets stdin, stdout, stderr to the socket */	
	if (login && login_tty (fd) == -1) {
		g_printerr ("mount child process login_tty failed: %s\n", strerror (errno));
		return -1;
	}
#endif

and was added by this patch http://cvs.gnome.org/viewcvs/gnome-vfs/libgnomevfs/gnome-vfs-pty.c?r1=1.4&r2=1.5

Solaris doesn't have login_tty(), although it does have utmp.h. There's a reimplementation of login_tty in libzvt: http://cvs.gnome.org/viewcvs/libzvt/libzvt/gnome-login-support.c?rev=1.15