Enable NLS catalog of csh(1).

The tcsh 6.14 uses libiconv to convert catalogs to appropriate charset
dynamically.  However, we don't have libiconv in our tree.  So, I made
some hack to load libiconv dynamically.  If libiconv is available, you
can use catalogs for more locales than the locales which catalog is
actually installed.
To use this feature, you need to symlink catalogs to appropriate
locales.  You can do this by installing ports/shells/tcsh_nls.

Reviewed by:	arch (no objection)
MFC after:	1 week

4 files changed, 136 insertions, 1 deletions

diff --git a/bin/csh/Makefile b/bin/csh/Makefile
index 97578aa..dd3b002 100644
--- a/bin/csh/Makefile
+++ b/bin/csh/Makefile
@@ -70,12 +70,30 @@ NLSLINKS_de_DE.ISO8859-1= de_AT.ISO8859-1 de_AT.ISO8859-15 de_CH.ISO8859-1 \
 NLSLINKS_it_IT.ISO8859-1= it_CH.ISO8859-1 it_CH.ISO8859-15 it_IT.ISO8859-15
 NLSLINKS_es_ES.ISO8859-1= es_ES.ISO8859-15
 
+.if defined(NO_NLS_CATALOGS) || defined(RESCUE)
+CFLAGS+= -DNO_NLS_CATALOGS
+.else
+CFLAGS+= -DHAVE_ICONV
+SRCS+=	iconv_stub.c
+# Folloing links can be installed from ports/shells/tcsh_nls:
+# NLSLINKS_de_DE.ISO8859-1 += de_AT.UTF-8 de_CH.UTF-8 de_DE.UTF-8
+# NLSLINKS_el_GR.ISO8859-7 = el_GR.UTF-8
+# NLSLINKS_es_ES.ISO8859-1 += es_ES.UTF-8
+# NLSLINKS_et_EE.ISO8859-15 = et_EE.UTF-8
+# NLSLINKS_fi_FI.ISO8859-1 += fi_FI.UTF-8
+# NLSLINKS_fr_FR.ISO8859-1 += fr_BE.UTF-8 fr_CA.UTF-8 fr_CH.UTF-8 fr_FR.UTF-8
+# NLSLINKS_it_IT.ISO8859-1 += it_CH.UTF-8 it_IT.UTF-8
+# NLSLINKS_ja_JP.eucJP = ja_JP.SJIS ja_JP.UTF-8
+# NLSLINKS_ru_RU.KOI8-R = ru_RU.CP1251 ru_RU.CP866 ru_RU.ISO8859-5 ru_RU.UTF-8
+# NLSLINKS_uk_UA.KOI8-U = uk_UA.ISO8859-5 uk_UA.UTF-8
+.endif
+
 NLSNAME= tcsh
 
 .for catalog in ${CATALOGS}
 NLS+=		${catalog:C/.*://}
 NLSSRCDIR_${catalog:C/.*://}= ${TCSHDIR}/nls/${catalog:C/:.*//}
-NLSSRCFILES_${catalog:C/.*://}!= cd ${NLSSRCDIR_${catalog:C/.*://}}; echo set[0-9]*
+NLSSRCFILES_${catalog:C/.*://}!= cd ${NLSSRCDIR_${catalog:C/.*://}}; echo charset set[0-9]*
 .endfor
 
 csh.1: tcsh.man
diff --git a/bin/csh/config.h b/bin/csh/config.h
index 6189e72..3929e37 100644
--- a/bin/csh/config.h
+++ b/bin/csh/config.h
@@ -205,3 +205,7 @@
 
 #include "config_p.h"
 #include "config_f.h"
+
+#ifndef NO_NLS_CATALOGS
+#define NLS_CATALOGS
+#endif
diff --git a/bin/csh/iconv.h b/bin/csh/iconv.h
new file mode 100644
index 0000000..89e9d0d
--- /dev/null
+++ b/bin/csh/iconv.h
@@ -0,0 +1,44 @@
+/*-
+ * Copyright (c) 2006 Hajimu UMEMOTO <ume@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _ICONV_H_
+#define _ICONV_H_
+
+typedef void *iconv_t;
+typedef size_t dl_iconv_t(iconv_t, const char **, size_t *, char **, size_t *);
+typedef int dl_iconv_close_t(iconv_t);
+
+extern iconv_t dl_iconv_open(const char *, const char *);
+extern dl_iconv_t *dl_iconv;
+extern dl_iconv_close_t *dl_iconv_close;
+
+#define iconv_open	dl_iconv_open
+#define iconv		dl_iconv
+#define iconv_close	dl_iconv_close
+
+#endif /* !_ICONV_H_ */
diff --git a/bin/csh/iconv_stub.c b/bin/csh/iconv_stub.c
new file mode 100644
index 0000000..6bbbbb0
--- /dev/null
+++ b/bin/csh/iconv_stub.c
@@ -0,0 +1,69 @@
+/*-
+ * Copyright (c) 2006 Hajimu UMEMOTO <ume@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <dlfcn.h>
+#include <stddef.h>
+
+#include "iconv.h"
+
+#undef iconv_open
+#undef iconv
+#undef iconv_close
+
+#define ICONVLIB	"libiconv.so"
+#define ICONV_ENGINE	"iconv"
+#define ICONV_OPEN	"iconv_open"
+#define ICONV_CLOSE	"iconv_close"
+
+typedef iconv_t iconv_open_t(const char *, const char *);
+
+dl_iconv_t *dl_iconv;
+dl_iconv_close_t *dl_iconv_close;
+
+static int initialized;
+static void *iconvlib;
+static iconv_open_t *iconv_open;
+
+iconv_t
+dl_iconv_open(const char *tocode, const char *fromcode)
+{
+	if (initialized) {
+		if (iconvlib == NULL)
+			return (iconv_t)-1;
+	} else {
+		initialized = 1;
+		iconvlib = dlopen(ICONVLIB, RTLD_LAZY | RTLD_GLOBAL);
+		if (iconvlib == NULL)
+			return (iconv_t)-1;
+		iconv_open = (iconv_open_t *)dlfunc(iconvlib, ICONV_OPEN);
+		dl_iconv = (dl_iconv_t *)dlfunc(iconvlib, ICONV_ENGINE);
+		dl_iconv_close = (dl_iconv_close_t *)dlfunc(iconvlib,
+		    ICONV_CLOSE);
+	}
+	return iconv_open(tocode, fromcode);
+}