Having created and used uxsel, it actually turns out to be

practically trivial to put all the pieces together and create a
working prototype of Unix PuTTY! It's missing a lot of things -
notably GUI request boxes for host keys and logfiles and so forth,
the Event Log, mid-session reconfiguration, session loading and
saving, sensible population of the character sets drop-down list and
probably other fiddly little things too - but it will put up a
config box and then create a GUI window containing an SSH connection
to the host you specified, so it's _basically_ there. Woo!

[originally from svn r3020]

unix/ptermm.c

@@ -0,0 +1,27 @@
+/*
+ * pterm main program.
+ */
+
+#include <stdio.h>
+
+#include "putty.h"
+
+Backend *select_backend(Config *cfg)
+{
+    return &pty_backend;
+}
+
+int cfgbox(Config *cfg)
+{
+    return 1;			       /* no-op in pterm */
+}
+
+int main(int argc, char **argv)
+{
+    extern int pt_main(int argc, char **argv);
+    extern void pty_pre_init(void);    /* declared in pty.c */
+
+    pty_pre_init();
+
+    return pt_main(argc, argv);
+}