Compiling netcat under cygwin

[Bjoern Kahl AG Resy]

 Hallo !


On Thu, 5 Sep 2002, Nenad Antic (EAB) wrote:
> I would like to get netcat
> (http://www.atstake.com/research/tools/nc110.tgz) compiled natively
> under cygwin. Currently there isn't any appropriate target in
> netcat's makefile to do this.
>
> I do know that there is a Windows NT version available at
>
> http://www.atstake.com/research/tools/nc11nt.zip
>
> However, when using that version under cygwin netcat behaves a bit
> funny.

 [ ... ]

> Would anybody know how to set up the gcc options so that netcat
> can compile under cygwin properly? I would be really grateful
> for this information.

 Please find the attached patch.
 unpack the above mentioned tar-file in a empty directory,
 save the patch in the same directory, then run in that directory
   patch <netcat-cygwin.patch
   make cygwin
 You should find a nc binary after these steps in the directory.

 Note: I am in no connection to the netcat maintainer, neither
 native or  cygwin, and I have no plans to maintain a
 cygwin-version. I just taken 10 minutes to hack this up.


   Bjoern

-- 
+---------------------------------------------------------------------+
| Dipl.-Phys. Bjoern Kahl +++ AG Embedded Systems and Robotics (RESY) |
| Informatics Faculty +++ Building 48 +++ University of Kaiserslautern|
| phone: +49-631-205-2654 +++ www: http://resy.informatik.uni-kl.de   |
+---------------------------------------------------------------------+
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diff -u netcat.orig/Makefile /Makefile
--- netcat.orig/Makefile	Wed Mar 20 04:16:06 1996
+++ /Makefile	Thu Sep  5 13:47:30 2002
@@ -109,9 +109,16 @@
 next:
 	make -e $(ALL) $(MFLAGS) XFLAGS='-DNEXT' STATIC=-Bstatic
 
+
+# cygwin Unix-emulationlayer for Win9x/NT/...
+cygwin:
+	make -e $(ALL) $(MFLAGS) XFLAGS='-DCYGWIN' STATIC= CC=gcc
+
+
 # start with this for a new architecture, and see what breaks.
 generic:
 	make -e $(ALL) $(MFLAGS) XFLAGS='-DGENERIC' STATIC=
+
 
 # Still at large: dgux dynix ???
 
diff -u netcat.orig/generic.h /generic.h
--- netcat.orig/generic.h	Sun Feb 18 02:36:43 1996
+++ /generic.h	Thu Sep  5 14:17:18 2002
@@ -70,6 +70,9 @@
 /* a sysvism, I think, but ... */
 #define HAVE_SYSINFO
 
+/* not found on cygwin as far as i know (kahl@informatik.uni-kl.de) */
+#define HAVE_RES_INIT
+
 /* ============= */
 /* Include files */
 /* ============= */
@@ -359,6 +362,20 @@
 #undef UTMPX
 #undef HAVE_SELECT_X
 #endif /* NeXTSTEP 3.2 motorola */
+
+
+/* cygwin unix-emulation-layer formWin9x/NT/...
+ * they try to be posix and linux compatible... */
+#ifdef CYGWIN
+#undef UTMPX
+#undef HAVE_SYSINFO
+#undef HAVE_SELECT_H
+#undef HAVE_TTYENT_H
+#define HAVE_NO_LSRR
+#define HAVE_NO_NOP
+#undef HAVE_RES_INIT
+#endif /* cygwin */
+
 
 /* Make some "generic" assumptions if all else fails */
 #ifdef GENERIC
diff -u netcat.orig/netcat.c /netcat.c
--- netcat.orig/netcat.c	Thu Mar 21 01:38:04 1996
+++ /netcat.c	Thu Sep  5 14:09:48 2002
@@ -713,6 +713,7 @@
   if (gatesidx) {		/* if we wanted any srcrt hops ... */
 /* don't even bother compiling if we can't do IP options here! */
 #ifdef IP_OPTIONS
+#ifndef HAVE_NO_LSRR
     if (! optbuf) {		/* and don't already *have* a srcrt set */
       char * opp;		/* then do all this setup hair */
       optbuf = Hmalloc (48);
@@ -737,6 +738,9 @@
     rr = setsockopt (nnetfd, IPPROTO_IP, IP_OPTIONS, optbuf, x);
     if (rr == -1)
       bail ("srcrt setsockopt fuxored");
+#else /* HAVE_NO_LSRR */
+    holler ("Warning: source routing unavailable on this machine, ignoring");
+#endif
 #else /* IP_OPTIONS */
     holler ("Warning: source routing unavailable on this machine, ignoring");
 #endif /* IP_OPTIONS*/
@@ -1315,8 +1319,10 @@
   char * randports = NULL;
 
 #ifdef HAVE_BIND
+#ifdef HAVE_RES_INIT
 /* can *you* say "cc -yaddayadda netcat.c -lresolv -l44bsd" on SunLOSs? */
   res_init();
+#endif
 #endif
 /* I was in this barbershop quartet in Skokie IL ... */
 /* round up the usual suspects, i.e. malloc up all the stuff we need */

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