moved all files to the top-level

bin/Makefile.am

@@ -0,0 +1,74 @@
+AUTOMAKE_OPTIONS = nostdinc
+
+CPPFLAGS_COMMON = \
+	-I$(abs_builddir) \
+	-I$(abs_builddir)/../lib  \
+	-I$(abs_srcdir) \
+	-I$(abs_srcdir)/../lib \
+	-I$(includedir)	
+CFLAGS_COMMON =
+LDFLAGS_COMMON = -L$(abs_builddir)/../lib -L$(libdir)
+LIBADD_COMMON = ../lib/libhio.la
+
+bin_PROGRAMS = hio-execd
+hio_execd_SOURCES = execd.c
+hio_execd_CPPFLAGS = $(CPPFLAGS_COMMON)
+hio_execd_CFLAGS = $(CFLAGS_COMMON)
+hio_execd_LDFLAGS = $(LDFLAGS_COMMON)
+hio_execd_LDADD = $(LIBADD_COMMON) 
+
+if HAVE_X11_LIB
+bin_PROGRAMS += hio-te
+hio_te_SOURCES = te.c 
+hio_te_CPPFLAGS = $(CPPFLAGS_COMMON)
+hio_te_CFLAGS = $(CFLAGS_COMMON)
+hio_te_LDFLAGS = $(LDFLAGS_COMMON)
+hio_te_LDADD = $(LIBADD_COMMON) -lX11
+endif
+
+bin_PROGRAMS += hio-t01
+hio_t01_SOURCES = t01.c
+hio_t01_CPPFLAGS = $(CPPFLAGS_COMMON)
+hio_t01_CFLAGS = $(CFLAGS_COMMON)
+hio_t01_LDFLAGS = $(LDFLAGS_COMMON)
+hio_t01_LDADD = $(LIBADD_COMMON) 
+
+bin_PROGRAMS += hio-t02
+hio_t02_SOURCES = t02.c
+hio_t02_CPPFLAGS = $(CPPFLAGS_COMMON)
+hio_t02_CFLAGS = $(CFLAGS_COMMON)
+hio_t02_LDFLAGS = $(LDFLAGS_COMMON)
+hio_t02_LDADD = $(LIBADD_COMMON)
+
+bin_PROGRAMS += hio-t03
+hio_t03_SOURCES = t03.c
+hio_t03_CPPFLAGS = $(CPPFLAGS_COMMON)
+hio_t03_CFLAGS = $(CFLAGS_COMMON)
+hio_t03_LDFLAGS = $(LDFLAGS_COMMON)
+hio_t03_LDADD = $(LIBADD_COMMON)
+
+bin_PROGRAMS += hio-t04
+hio_t04_SOURCES = t04.c
+hio_t04_CPPFLAGS = $(CPPFLAGS_COMMON)
+hio_t04_CFLAGS = $(CFLAGS_COMMON)
+hio_t04_LDFLAGS = $(LDFLAGS_COMMON)
+hio_t04_LDADD = $(LIBADD_COMMON)
+if ENABLE_MARIADB
+hio_t04_CFLAGS += $(MARIADB_CFLAGS)  
+hio_t04_LDFLAGS += $(MARIADB_LDFLAGS)  
+hio_t04_LDADD += $(MARIADB_LIBS)  
+endif
+
+bin_PROGRAMS += hio-t05
+hio_t05_SOURCES = t05.c
+hio_t05_CPPFLAGS = $(CPPFLAGS_COMMON)
+hio_t05_CFLAGS = $(CFLAGS_COMMON)
+hio_t05_LDFLAGS = $(LDFLAGS_COMMON)
+hio_t05_LDADD = $(LIBADD_COMMON)
+
+bin_PROGRAMS += hio-t06
+hio_t06_SOURCES = t06.c
+hio_t06_CPPFLAGS = $(CPPFLAGS_COMMON)
+hio_t06_CFLAGS = $(CFLAGS_COMMON)
+hio_t06_LDFLAGS = $(LDFLAGS_COMMON)
+hio_t06_LDADD = $(LIBADD_COMMON)

bin/Makefile.in

@@ -0,0 +1,938 @@
+# Makefile.in generated by automake 1.16.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2018 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
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+  esac; \
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+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
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+	hio-t05$(EXEEXT) hio-t06$(EXEEXT)
+@HAVE_X11_LIB_TRUE@am__append_1 = hio-te
+@ENABLE_MARIADB_TRUE@am__append_2 = $(MARIADB_CFLAGS)  
+@ENABLE_MARIADB_TRUE@am__append_3 = $(MARIADB_LDFLAGS)  
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+	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
+	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
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+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(hio_t02_CFLAGS) \
+	$(CFLAGS) $(hio_t02_LDFLAGS) $(LDFLAGS) -o $@
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+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(hio_t06_CFLAGS) \
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+am__hio_te_SOURCES_DIST = te.c
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+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(hio_te_CFLAGS) $(CFLAGS) \
+	$(hio_te_LDFLAGS) $(LDFLAGS) -o $@
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+	./$(DEPDIR)/hio_t01-t01.Po ./$(DEPDIR)/hio_t02-t02.Po \
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+	./$(DEPDIR)/hio_te-te.Po
+am__mv = mv -f
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+LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
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+	$(AM_CFLAGS) $(CFLAGS)
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+	$(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_@AM_V@)
+am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
+am__v_CCLD_0 = @echo "  CCLD    " $@;
+am__v_CCLD_1 = 
+SOURCES = $(hio_execd_SOURCES) $(hio_t01_SOURCES) $(hio_t02_SOURCES) \
+	$(hio_t03_SOURCES) $(hio_t04_SOURCES) $(hio_t05_SOURCES) \
+	$(hio_t06_SOURCES) $(hio_te_SOURCES)
+DIST_SOURCES = $(hio_execd_SOURCES) $(hio_t01_SOURCES) \
+	$(hio_t02_SOURCES) $(hio_t03_SOURCES) $(hio_t04_SOURCES) \
+	$(hio_t05_SOURCES) $(hio_t06_SOURCES) \
+	$(am__hio_te_SOURCES_DIST)
+am__can_run_installinfo = \
+  case $$AM_UPDATE_INFO_DIR in \
+    n|no|NO) false;; \
+    *) (install-info --version) >/dev/null 2>&1;; \
+  esac
+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
+# Read a list of newline-separated strings from the standard input,
+# and print each of them once, without duplicates.  Input order is
+# *not* preserved.
+am__uniquify_input = $(AWK) '\
+  BEGIN { nonempty = 0; } \
+  { items[$$0] = 1; nonempty = 1; } \
+  END { if (nonempty) { for (i in items) print i; }; } \
+'
+# Make sure the list of sources is unique.  This is necessary because,
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+# for different programs/libraries.
+am__define_uniq_tagged_files = \
+  list='$(am__tagged_files)'; \
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+  done | $(am__uniquify_input)`
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+CTAGS = ctags
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+MARIADB_VERSION = @MARIADB_VERSION@
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+CPPFLAGS_COMMON = \
+	-I$(abs_builddir) \
+	-I$(abs_builddir)/../lib  \
+	-I$(abs_srcdir) \
+	-I$(abs_srcdir)/../lib \
+	-I$(includedir)	
+
+CFLAGS_COMMON = 
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+hio_execd_LDFLAGS = $(LDFLAGS_COMMON)
+hio_execd_LDADD = $(LIBADD_COMMON) 
+@HAVE_X11_LIB_TRUE@hio_te_SOURCES = te.c 
+@HAVE_X11_LIB_TRUE@hio_te_CPPFLAGS = $(CPPFLAGS_COMMON)
+@HAVE_X11_LIB_TRUE@hio_te_CFLAGS = $(CFLAGS_COMMON)
+@HAVE_X11_LIB_TRUE@hio_te_LDFLAGS = $(LDFLAGS_COMMON)
+@HAVE_X11_LIB_TRUE@hio_te_LDADD = $(LIBADD_COMMON) -lX11
+hio_t01_SOURCES = t01.c
+hio_t01_CPPFLAGS = $(CPPFLAGS_COMMON)
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+mostlyclean-libtool:
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+	$(am__define_uniq_tagged_files); mkid -fID $$unique
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+	$(am__define_uniq_tagged_files); \
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+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
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+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
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+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
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+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
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+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
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+	    || exit 1; \
+	  fi; \
+	done
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
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+	fi
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+	-rm -f ./$(DEPDIR)/hio_t03-t03.Po
+	-rm -f ./$(DEPDIR)/hio_t04-t04.Po
+	-rm -f ./$(DEPDIR)/hio_t05-t05.Po
+	-rm -f ./$(DEPDIR)/hio_t06-t06.Po
+	-rm -f ./$(DEPDIR)/hio_te-te.Po
+	-rm -f Makefile
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+	mostlyclean-libtool
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+	ctags ctags-am distclean distclean-compile distclean-generic \
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+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:

bin/execd.c

@@ -0,0 +1,386 @@
+/*
+ * $Id$
+ *
+    Copyright (c) 2016-2020 Chung, Hyung-Hwan. 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 "AS IS" AND ANY EXPRESS OR
+    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAfRRANTIES
+    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+    IN NO EVENT SHALL THE AUTHOR 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.
+ */
+
+
+#include <hio.h>
+#include <hio-utl.h>
+#include <hio-sck.h>
+#include <hio-pro.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <signal.h>
+
+#include <net/if.h>
+
+#include <assert.h>
+
+#if defined(HAVE_OPENSSL_SSL_H) && defined(HAVE_SSL)
+#	include <openssl/ssl.h>
+#	if defined(HAVE_OPENSSL_ERR_H)
+#		include <openssl/err.h>
+#	endif
+#	if defined(HAVE_OPENSSL_ENGINE_H)
+#		include <openssl/engine.h>
+#	endif
+#	define USE_SSL
+#endif
+
+/* ========================================================================= */
+
+struct mmgr_stat_t
+{
+	hio_oow_t total_count;
+};
+
+typedef struct mmgr_stat_t mmgr_stat_t;
+
+static mmgr_stat_t mmgr_stat;
+
+static void* mmgr_alloc (hio_mmgr_t* mmgr, hio_oow_t size)
+{
+	void* x;
+
+#if 0
+	if (((mmgr_stat_t*)mmgr->ctx)->total_count > 300)
+	{
+printf ("CRITICAL ERROR ---> too many heap chunks...\n");
+		return HIO_NULL;
+	}
+#endif
+
+	x = malloc (size);
+	if (x) ((mmgr_stat_t*)mmgr->ctx)->total_count++;
+	return x;
+}
+
+static void* mmgr_realloc (hio_mmgr_t* mmgr, void* ptr, hio_oow_t size)
+{
+	return realloc (ptr, size);
+}
+
+static void mmgr_free (hio_mmgr_t* mmgr, void* ptr)
+{
+	((mmgr_stat_t*)mmgr->ctx)->total_count--;
+	return free (ptr);
+}
+
+
+static hio_mmgr_t mmgr = 
+{
+	mmgr_alloc,
+	mmgr_realloc,
+	mmgr_free,
+	&mmgr_stat
+};
+
+/* ========================================================================= */
+
+#if defined(USE_SSL)
+static void cleanup_openssl ()
+{
+	/* ERR_remove_state() should be called for each thread if the application is thread */
+	ERR_remove_state (0);
+#if defined(HAVE_ENGINE_CLEANUP)
+	ENGINE_cleanup ();
+#endif
+	ERR_free_strings ();
+	EVP_cleanup ();
+#if defined(HAVE_CRYPTO_CLEANUP_ALL_EX_DATA)
+	CRYPTO_cleanup_all_ex_data ();
+#endif
+}
+#endif
+
+struct tcp_server_t
+{
+	int tally;
+};
+typedef struct tcp_server_t tcp_server_t;
+
+static void tcp_sck_on_disconnect (hio_dev_sck_t* tcp)
+{
+	switch (HIO_DEV_SCK_GET_PROGRESS(tcp))
+	{
+		case HIO_DEV_SCK_CONNECTING:
+			HIO_INFO1 (tcp->hio, "OUTGOING SESSION DISCONNECTED - FAILED TO CONNECT (%d) TO REMOTE SERVER\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_CONNECTING_SSL:
+			HIO_INFO1 (tcp->hio, "OUTGOING SESSION DISCONNECTED - FAILED TO SSL-CONNECT (%d) TO REMOTE SERVER\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_LISTENING:
+			HIO_INFO1 (tcp->hio, "SHUTTING DOWN THE SERVER SOCKET(%d)...\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_CONNECTED:
+			HIO_INFO1 (tcp->hio, "OUTGOING CLIENT CONNECTION GOT TORN DOWN(%d).......\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_ACCEPTING_SSL:
+			HIO_INFO1 (tcp->hio, "INCOMING SSL-ACCEPT GOT DISCONNECTED(%d) ....\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_ACCEPTED:
+			HIO_INFO1 (tcp->hio, "INCOMING CLIENT BEING SERVED GOT DISCONNECTED(%d).......\n", (int)tcp->hnd);
+			break;
+
+		default:
+			HIO_INFO2 (tcp->hio, "SOCKET DEVICE DISCONNECTED (%d - %x)\n", (int)tcp->hnd, (unsigned int)tcp->state);
+			break;
+	}
+}
+
+static void tcp_sck_on_connect (hio_dev_sck_t* tcp)
+{
+	hio_bch_t buf1[128], buf2[128];
+
+	hio_skadtobcstr (tcp->hio, &tcp->localaddr, buf1, HIO_COUNTOF(buf1), HIO_SKAD_TO_BCSTR_ADDR | HIO_SKAD_TO_BCSTR_PORT);
+	hio_skadtobcstr (tcp->hio, &tcp->remoteaddr, buf2, HIO_COUNTOF(buf2), HIO_SKAD_TO_BCSTR_ADDR | HIO_SKAD_TO_BCSTR_PORT);
+
+	if (tcp->state & HIO_DEV_SCK_CONNECTED)
+	{
+		HIO_INFO3 (tcp->hio, "DEVICE connected to a remote server... LOCAL %hs REMOTE %hs SCK: %d\n", buf1, buf2, tcp->hnd);
+	}
+	else if (tcp->state & HIO_DEV_SCK_ACCEPTED)
+	{
+		HIO_INFO3 (tcp->hio, "DEVICE accepted client device... .LOCAL %hs REMOTE %hs SCK: %d\n", buf1, buf2, tcp->hnd);
+	}
+
+	if (hio_dev_sck_write(tcp, "hello", 5, HIO_NULL, HIO_NULL) <= -1)
+	{
+		hio_dev_sck_halt (tcp);
+	}
+}
+
+static int tcp_sck_on_write (hio_dev_sck_t* tcp, hio_iolen_t wrlen, void* wrctx, const hio_skad_t* dstaddr)
+{
+	tcp_server_t* ts;
+	hio_ntime_t tmout;
+
+	if (wrlen <= -1)
+	{
+		HIO_INFO1 (tcp->hio, "TCP_SCK_ON_WRITE(%d) >>> SEDING TIMED OUT...........\n", (int)tcp->hnd);
+		hio_dev_sck_halt (tcp);
+	}
+	else
+	{
+		ts = (tcp_server_t*)(tcp + 1);
+		if (wrlen == 0)
+		{
+			HIO_INFO1 (tcp->hio, "TCP_SCK_ON_WRITE(%d) >>> CLOSED WRITING END\n", (int)tcp->hnd);
+		}
+		else
+		{
+			HIO_INFO3 (tcp->hio, "TCP_SCK_ON_WRITE(%d) >>> SENT MESSAGE %d of length %ld\n", (int)tcp->hnd, ts->tally, (long int)wrlen);
+		}
+
+		ts->tally++;
+	//	if (ts->tally >= 2) hio_dev_sck_halt (tcp);
+
+		
+		HIO_INIT_NTIME (&tmout, 5, 0);
+		//hio_dev_sck_read (tcp, 1);
+
+		HIO_INFO3 (tcp->hio, "TCP_SCK_ON_WRITE(%d) >>> REQUESTING to READ with timeout of %ld.%08ld\n", (int)tcp->hnd, (long int)tmout.sec, (long int)tmout.nsec);
+		hio_dev_sck_timedread (tcp, 1, &tmout);
+	}
+	return 0;
+}
+
+static int tcp_sck_on_read (hio_dev_sck_t* tcp, const void* buf, hio_iolen_t len, const hio_skad_t* srcaddr)
+{
+	int n;
+
+	if (len <= -1)
+	{
+		HIO_INFO1 (tcp->hio, "TCP_SCK_ON_READ(%d) STREAM DEVICE: TIMED OUT...\n", (int)tcp->hnd);
+		hio_dev_sck_halt (tcp);
+		return 0;
+	}
+	else if (len <= 0)
+	{
+		HIO_INFO1 (tcp->hio, "TCP_SCK_ON_READ(%d) STREAM DEVICE: EOF RECEIVED...\n", (int)tcp->hnd);
+		/* no outstanding request. but EOF */
+		hio_dev_sck_halt (tcp);
+		return 0;
+	}
+
+	HIO_INFO2 (tcp->hio, "TCP_SCK_ON_READ(%d) - received %d bytes\n", (int)tcp->hnd, (int)len);
+
+	{
+		hio_ntime_t tmout;
+
+		static char a ='A';
+		static char xxx[1000000];
+		memset (xxx, a++ , HIO_SIZEOF(xxx));
+
+		HIO_INFO2 (tcp->hio, "TCP_SCK_ON_READ(%d) >>> REQUESTING to write data of %d bytes\n", (int)tcp->hnd, HIO_SIZEOF(xxx));
+		//return hio_dev_sck_write  (tcp, "HELLO", 5, HIO_NULL);
+		HIO_INIT_NTIME (&tmout, 5, 0);
+		n = hio_dev_sck_timedwrite(tcp, xxx, HIO_SIZEOF(xxx), &tmout, HIO_NULL, HIO_NULL);
+
+		if (n <= -1) return -1;
+	}
+
+	HIO_INFO1 (tcp->hio, "TCP_SCK_ON_READ(%d) - REQUESTING TO STOP READ\n", (int)tcp->hnd);
+	hio_dev_sck_read (tcp, 0);
+
+#if 0
+	HIO_INFO1 (tcp->hio, "TCP_SCK_ON_READ(%d) - REQUESTING TO CLOSE WRITING END\n", (int)tcp->hnd);
+	/* post the write finisher - close the writing end */
+	n = hio_dev_sck_write(tcp, HIO_NULL, 0, HIO_NULL, HIO_NULL);
+	if (n <= -1) return -1;
+#endif
+
+	return 0;
+
+/* return 1; let the main loop to read more greedily without consulting the multiplexer */
+}
+
+/* ========================================================================= */
+
+static void pro_on_close (hio_dev_pro_t* pro, hio_dev_pro_sid_t sid)
+{
+	hio_t* hio = pro->hio;
+	if (sid == HIO_DEV_PRO_MASTER)
+		HIO_INFO1 (hio, "PROCESS(%d) CLOSE MASTER\n", (int)pro->child_pid);
+	else
+		HIO_INFO2 (hio, "PROCESS(%d) CLOSE SLAVE[%d]\n", (int)pro->child_pid, sid);
+}
+
+static int pro_on_read (hio_dev_pro_t* pro, hio_dev_pro_sid_t sid, const void* data, hio_iolen_t dlen)
+{
+	hio_t* hio = pro->hio;
+
+	if (dlen <= -1)
+	{
+		HIO_INFO1 (hio, "PROCESS(%d): READ TIMED OUT...\n", (int)pro->child_pid);
+		hio_dev_pro_halt (pro);
+		return 0;
+	}
+	else if (dlen <= 0)
+	{
+		HIO_INFO1 (hio, "PROCESS(%d): EOF RECEIVED...\n", (int)pro->child_pid);
+		/* no outstanding request. but EOF */
+		hio_dev_pro_halt (pro);
+		return 0;
+	}
+
+	HIO_INFO5 (hio, "PROCESS(%d) READ DATA ON SLAVE[%d] len=%d [%.*hs]\n", (int)pro->child_pid, (int)sid, (int)dlen, dlen, (char*)data);
+	if (sid == HIO_DEV_PRO_OUT)
+	{
+		hio_dev_pro_read (pro, sid, 0);
+		hio_dev_pro_write (pro, "HELLO\n", 6, HIO_NULL);
+	}
+	return 0;
+}
+
+static int pro_on_write (hio_dev_pro_t* pro, hio_iolen_t wrlen, void* wrctx)
+{
+	hio_t* hio = pro->hio;
+	hio_ntime_t tmout;
+	if (wrlen <= -1)
+	{
+		HIO_INFO1 (hio, "PROCESS(%d): WRITE TIMED OUT...\n", (int)pro->child_pid);
+		hio_dev_pro_halt (pro);
+		return 0;
+	}
+
+	HIO_DEBUG2 (hio, "PROCESS(%d) wrote data of %d bytes\n", (int)pro->child_pid, (int)wrlen);
+	/*hio_dev_pro_read (pro, HIO_DEV_PRO_OUT, 1);*/
+	HIO_INIT_NTIME (&tmout, 5, 0);
+	hio_dev_pro_timedread (pro, HIO_DEV_PRO_OUT, 1, &tmout);
+	return 0;
+}
+
+
+
+/* ========================================================================= */
+
+static hio_t* g_hio;
+
+static void handle_signal (int sig)
+{
+	if (g_hio) hio_stop (g_hio, HIO_STOPREQ_TERMINATION);
+}
+
+int main (int argc, char* argv[])
+{
+	hio_t* hio = HIO_NULL;
+	hio_dev_sck_t* tcpsvr;
+	hio_dev_sck_make_t tcp_make;
+	hio_dev_sck_connect_t tcp_conn;
+	tcp_server_t* ts;
+
+	hio = hio_open(&mmgr, 0, HIO_NULL, HIO_FEATURE_ALL, 512, HIO_NULL);
+	if (!hio)
+	{
+		printf ("Cannot open hio\n");
+		goto oops;
+	}
+
+	memset (&tcp_make, 0, HIO_SIZEOF(tcp_make));
+	tcp_make.type = HIO_DEV_SCK_TCP4;
+	tcp_make.on_write = tcp_sck_on_write;
+	tcp_make.on_read = tcp_sck_on_read;
+	tcp_make.on_connect = tcp_sck_on_connect;
+	tcp_make.on_disconnect = tcp_sck_on_disconnect;
+	tcpsvr = hio_dev_sck_make(hio, HIO_SIZEOF(tcp_server_t), &tcp_make);
+	if (!tcpsvr)
+	{
+		printf ("Cannot make a tcp server\n");
+		goto oops;
+	}
+
+	ts = (tcp_server_t*)(tcpsvr + 1);
+	ts->tally = 0;
+
+	memset (&tcp_conn, 0, HIO_SIZEOF(tcp_conn));
+	hio_bcstrtoskad(hio, "127.0.0.1:9999", &tcp_conn.remoteaddr);
+	HIO_INIT_NTIME (&tcp_conn.connect_tmout, 5, 0);
+	tcp_conn.options = 0;
+	if (hio_dev_sck_connect(tcpsvr, &tcp_conn) <= -1)
+	{
+	}
+
+#if 0
+	while (1)
+	{
+		hio_exec (hio);
+	}
+#endif
+	hio_loop (hio);
+
+oops:
+	if (hio) hio_close (hio);
+	return 0;
+}

bin/t02.c

@@ -0,0 +1,258 @@
+
+#include <hio.h>
+#include <hio-utl.h>
+#include <hio-sck.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+struct mmgr_stat_t
+{
+	hio_oow_t total_count;
+};
+
+typedef struct mmgr_stat_t mmgr_stat_t;
+
+static mmgr_stat_t mmgr_stat;
+
+static void* mmgr_alloc (hio_mmgr_t* mmgr, hio_oow_t size)
+{
+	void* x;
+
+	if (((mmgr_stat_t*)mmgr->ctx)->total_count > 3000)
+	{
+printf ("CRITICAL ERROR ---> too many heap chunks...\n");
+		return HIO_NULL;
+	}
+
+	x = malloc (size);
+	if (x) ((mmgr_stat_t*)mmgr->ctx)->total_count++;
+	return x;
+}
+
+static void* mmgr_realloc (hio_mmgr_t* mmgr, void* ptr, hio_oow_t size)
+{
+	return realloc (ptr, size);
+}
+
+static void mmgr_free (hio_mmgr_t* mmgr, void* ptr)
+{
+	((mmgr_stat_t*)mmgr->ctx)->total_count--;
+	return free (ptr);
+}
+
+
+static hio_mmgr_t mmgr = 
+{
+	mmgr_alloc,
+	mmgr_realloc,
+	mmgr_free,
+	&mmgr_stat
+};
+
+
+struct tcp_xtn_t
+{
+	int tally;
+};
+typedef struct tcp_xtn_t tcp_xtn_t;
+
+
+static void tcp_sck_on_disconnect (hio_dev_sck_t* tcp)
+{
+	switch (HIO_DEV_SCK_GET_PROGRESS(tcp))
+	{
+		case HIO_DEV_SCK_CONNECTING:
+			HIO_INFO1 (tcp->hio, "OUTGOING SESSION DISCONNECTED - FAILED TO CONNECT (%d) TO REMOTE SERVER\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_CONNECTING_SSL:
+			HIO_INFO1 (tcp->hio, "OUTGOING SESSION DISCONNECTED - FAILED TO SSL-CONNECT (%d) TO REMOTE SERVER\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_LISTENING:
+			HIO_INFO1 (tcp->hio, "SHUTTING DOWN THE SERVER SOCKET(%d)...\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_CONNECTED:
+			HIO_INFO1 (tcp->hio, "OUTGOING CLIENT CONNECTION GOT TORN DOWN(%d).......\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_ACCEPTING_SSL:
+			HIO_INFO1 (tcp->hio, "INCOMING SSL-ACCEPT GOT DISCONNECTED(%d) ....\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_ACCEPTED:
+			HIO_INFO1 (tcp->hio, "INCOMING CLIENT BEING SERVED GOT DISCONNECTED(%d).......\n", (int)tcp->hnd);
+			break;
+
+		default:
+			HIO_INFO2 (tcp->hio, "SOCKET DEVICE DISCONNECTED (%d - %x)\n", (int)tcp->hnd, (unsigned int)tcp->state);
+			break;
+	}
+}
+
+static void tcp_sck_on_connect (hio_dev_sck_t* tcp)
+{
+	hio_bch_t buf1[128], buf2[128];
+
+	hio_skadtobcstr (tcp->hio, &tcp->localaddr, buf1, HIO_COUNTOF(buf1), HIO_SKAD_TO_BCSTR_ADDR | HIO_SKAD_TO_BCSTR_PORT);
+	hio_skadtobcstr (tcp->hio, &tcp->remoteaddr, buf2, HIO_COUNTOF(buf2), HIO_SKAD_TO_BCSTR_ADDR | HIO_SKAD_TO_BCSTR_PORT);
+
+	if (tcp->state & HIO_DEV_SCK_CONNECTED)
+	{
+		HIO_INFO3 (tcp->hio, "DEVICE connected to a remote server... LOCAL %hs REMOTE %hs SCK: %d\n", buf1, buf2, tcp->hnd);
+	}
+	else if (tcp->state & HIO_DEV_SCK_ACCEPTED)
+	{
+		HIO_INFO3 (tcp->hio, "DEVICE accepted client device... .LOCAL %hs REMOTE %hs SCK: %d\n", buf1, buf2, tcp->hnd);
+	}
+
+	if (hio_dev_sck_write(tcp, "hello", 5, HIO_NULL, HIO_NULL) <= -1)
+	{
+		hio_dev_sck_halt (tcp);
+	}
+}
+
+static int tcp_sck_on_write (hio_dev_sck_t* tcp, hio_iolen_t wrlen, void* wrctx, const hio_skad_t* dstaddr)
+{
+	tcp_xtn_t* ts;
+	hio_ntime_t tmout;
+
+	if (wrlen <= -1)
+	{
+		HIO_INFO1 (tcp->hio, "TCP_SCK_ON_WRITE(%d) >>> SEDING TIMED OUT...........\n", (int)tcp->hnd);
+		hio_dev_sck_halt (tcp);
+	}
+	else
+	{
+		ts = (tcp_xtn_t*)(tcp + 1);
+		if (wrlen == 0)
+		{
+			HIO_INFO1 (tcp->hio, "TCP_SCK_ON_WRITE(%d) >>> CLOSED WRITING END\n", (int)tcp->hnd);
+		}
+		else
+		{
+			HIO_INFO3 (tcp->hio, "TCP_SCK_ON_WRITE(%d) >>> SENT MESSAGE %d of length %ld\n", (int)tcp->hnd, ts->tally, (long int)wrlen);
+		}
+
+		ts->tally++;
+	//	if (ts->tally >= 2) hio_dev_sck_halt (tcp);
+
+		
+		HIO_INIT_NTIME (&tmout, 5, 0);
+		//hio_dev_sck_read (tcp, 1);
+
+		HIO_INFO3 (tcp->hio, "TCP_SCK_ON_WRITE(%d) >>> REQUESTING to READ with timeout of %ld.%08ld\n", (int)tcp->hnd, (long int)tmout.sec, (long int)tmout.nsec);
+		hio_dev_sck_timedread (tcp, 1, &tmout);
+	}
+	return 0;
+}
+
+static int tcp_sck_on_read (hio_dev_sck_t* tcp, const void* buf, hio_iolen_t len, const hio_skad_t* srcaddr)
+{
+	int n;
+
+	if (len <= -1)
+	{
+		HIO_INFO1 (tcp->hio, "TCP_SCK_ON_READ(%d) STREAM DEVICE: TIMED OUT...\n", (int)tcp->hnd);
+		hio_dev_sck_halt (tcp);
+		return 0;
+	}
+	else if (len <= 0)
+	{
+		HIO_INFO1 (tcp->hio, "TCP_SCK_ON_READ(%d) STREAM DEVICE: EOF RECEIVED...\n", (int)tcp->hnd);
+		/* no outstanding request. but EOF */
+		hio_dev_sck_halt (tcp);
+		return 0;
+	}
+
+	HIO_INFO2 (tcp->hio, "TCP_SCK_ON_READ(%d) - received %d bytes\n", (int)tcp->hnd, (int)len);
+
+	{
+		hio_ntime_t tmout;
+
+		static char a ='A';
+		static char xxx[1000000];
+		memset (xxx, a++ , HIO_SIZEOF(xxx));
+
+		HIO_INFO2 (tcp->hio, "TCP_SCK_ON_READ(%d) >>> REQUESTING to write data of %d bytes\n", (int)tcp->hnd, HIO_SIZEOF(xxx));
+		//return hio_dev_sck_write  (tcp, "HELLO", 5, HIO_NULL);
+		HIO_INIT_NTIME (&tmout, 5, 0);
+		n = hio_dev_sck_timedwrite(tcp, xxx, HIO_SIZEOF(xxx), &tmout, HIO_NULL, HIO_NULL);
+
+		if (n <= -1) return -1;
+	}
+
+	HIO_INFO1 (tcp->hio, "TCP_SCK_ON_READ(%d) - REQUESTING TO STOP READ\n", (int)tcp->hnd);
+	hio_dev_sck_read (tcp, 0);
+
+#if 0
+	HIO_INFO1 (tcp->hio, "TCP_SCK_ON_READ(%d) - REQUESTING TO CLOSE WRITING END\n", (int)tcp->hnd);
+	/* post the write finisher - close the writing end */
+	n = hio_dev_sck_write(tcp, HIO_NULL, 0, HIO_NULL, HIO_NULL);
+	if (n <= -1) return -1;
+#endif
+
+	return 0;
+
+/* return 1; let the main loop to read more greedily without consulting the multiplexer */
+}
+
+
+int main (int argc, char* argv[])
+{
+
+	hio_t* hio = HIO_NULL;
+	hio_dev_sck_t* tcpsvr;
+	hio_dev_sck_make_t tcp_make;
+	hio_dev_sck_connect_t tcp_conn;
+	tcp_xtn_t* ts;
+
+	if (argc != 2)
+	{
+		fprintf (stderr, "Usage: %s ipaddr:port\n", argv[0]);
+		return -1;
+	}
+	hio = hio_open(&mmgr, 0, HIO_NULL, HIO_FEATURE_ALL, 512, HIO_NULL);
+	if (!hio)
+	{
+		printf ("Cannot open hio\n");
+		goto oops;
+	}
+
+	memset (&tcp_conn, 0, HIO_SIZEOF(tcp_conn));
+	hio_bcstrtoskad(hio, argv[1], &tcp_conn.remoteaddr);
+	HIO_INIT_NTIME (&tcp_conn.connect_tmout, 5, 0);
+	tcp_conn.options = 0;
+
+	memset (&tcp_make, 0, HIO_SIZEOF(tcp_make));
+	tcp_make.type = hio_skad_get_family(&tcp_conn.remoteaddr) == HIO_AF_INET? HIO_DEV_SCK_TCP4: HIO_DEV_SCK_TCP6;
+	tcp_make.on_write = tcp_sck_on_write;
+	tcp_make.on_read = tcp_sck_on_read;
+	tcp_make.on_connect = tcp_sck_on_connect;
+	tcp_make.on_disconnect = tcp_sck_on_disconnect;
+	tcpsvr = hio_dev_sck_make(hio, HIO_SIZEOF(tcp_xtn_t), &tcp_make);
+	if (!tcpsvr)
+	{
+		printf ("Cannot make a tcp server\n");
+		goto oops;
+	}
+
+	ts = (tcp_xtn_t*)(tcpsvr + 1);
+	ts->tally = 0;
+
+
+	if (hio_dev_sck_connect(tcpsvr, &tcp_conn) <= -1)
+	{
+	}
+
+	hio_loop (hio);
+
+oops:
+	if (hio) hio_close (hio);
+	return 0;
+
+	return 0;
+}
+

bin/t03.c

@@ -0,0 +1,265 @@
+
+#include <hio.h>
+#include <hio-json.h>
+#include <stdio.h>
+#include <string.h>
+
+#define DEBUG
+
+static int on_json_inst (hio_json_t* json, hio_json_inst_t inst, hio_oow_t level, hio_oow_t index, hio_json_state_t container_state, const hio_oocs_t* str, void* ctx)
+{
+	hio_t* hio = hio_json_gethio(json);
+	hio_oow_t i;
+
+	switch (inst)
+	{
+		case HIO_JSON_INST_START_ARRAY:
+			if (level > 0)
+			{
+				if (index > 0) hio_logbfmt (hio, HIO_LOG_STDOUT, ",\n");
+				for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t"); 
+			}
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>[\n", (unsigned long)index); 
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "[\n"); 
+		#endif
+			break;
+
+		case HIO_JSON_INST_END_ARRAY:
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "\n"); 
+			for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t"); 
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>]", (unsigned long)index); 
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "]"); 
+		#endif
+			break;
+
+		case HIO_JSON_INST_START_OBJECT:
+			if (level > 0)
+			{
+				if (index > 0) hio_logbfmt (hio, HIO_LOG_STDOUT, ",\n");
+				for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t"); 
+			}
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>{\n", (unsigned long)index); 
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "{\n"); 
+		#endif
+			break;
+
+		case HIO_JSON_INST_END_OBJECT:
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "\n"); 
+			for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t");
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>}", (unsigned long)index); 
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "}"); 
+		#endif
+			break;
+
+		case HIO_JSON_INST_KEY:
+			if (index > 0) hio_logbfmt (hio, HIO_LOG_STDOUT, ",\n");
+			for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t"); 
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>%.*js: ", (unsigned long)index, str->len, str->ptr);
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "%.*js: ", str->len, str->ptr);
+		#endif
+			break;
+
+		case HIO_JSON_INST_NIL:
+			if (level > 0)
+			{
+				if (index > 0) hio_logbfmt (hio, HIO_LOG_STDOUT, ",\n");
+				for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t"); 
+			}
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>null", (unsigned long)index);
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "null");
+		#endif
+			break;
+
+		case HIO_JSON_INST_TRUE:
+			if (level > 0)
+			{
+				if (index > 0) hio_logbfmt (hio, HIO_LOG_STDOUT, ",\n");
+				for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t"); 
+			}
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>true", (unsigned long)index);
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "true");
+		#endif
+			break;
+
+		case HIO_JSON_INST_FALSE:
+			if (level > 0)
+			{
+				if (index > 0) hio_logbfmt (hio, HIO_LOG_STDOUT, ",\n");
+				for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t"); 
+			}
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>false", (unsigned long)index);
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "false");
+		#endif
+			break;
+
+		case HIO_JSON_INST_NUMBER:
+			if (level > 0)
+			{
+				if (index > 0) hio_logbfmt (hio, HIO_LOG_STDOUT, ",\n");
+				for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t"); 
+			}
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>%.*js", (unsigned long)index, str->len, str->ptr); 
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "%.*js", str->len, str->ptr); 
+		#endif
+			break;
+
+		case HIO_JSON_INST_STRING:
+			if (level > 0)
+			{
+				if (index > 0) hio_logbfmt (hio, HIO_LOG_STDOUT, ",\n");
+				for (i = 0; i < level; i++) hio_logbfmt (hio, HIO_LOG_STDOUT, "\t"); 
+			}
+		#if defined(DEBUG)
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "<%lu>\"%.*js\"", (unsigned long)index, str->len, str->ptr); /* TODO: escaping */
+		#else
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "\"%.*js\"", str->len, str->ptr); /* TODO: escaping */
+		#endif
+			break;
+
+		default:
+			hio_logbfmt (hio, HIO_LOG_STDOUT, "*****UNKNOWN*****\n", str->len, str->ptr); 
+			return -1;
+	}
+	
+	return 0;
+}
+
+static int write_json_element (hio_jsonwr_t* jsonwr, const hio_bch_t* dptr, hio_oow_t dlen, void* ctx)
+{
+	fwrite (dptr, 1, dlen, stdout);
+	return 0;
+}
+
+int main (int argc, char* argv[])
+{
+	hio_t* hio = HIO_NULL;
+	hio_bitmask_t o = 0;
+	int i;
+
+	for (i = 1; i < argc; i++)
+	{
+		if (strcmp(argv[i], "--permit-word-key") == 0) o |= HIO_JSON_PERMIT_WORD_KEY;
+		if (strcmp(argv[i], "--optional-comma") == 0) o |= HIO_JSON_OPTIONAL_COMMA;
+		if (strcmp(argv[i], "--line-comment") == 0) o |= HIO_JSON_LINE_COMMENT;
+	}
+
+	hio = hio_open(HIO_NULL, 0, HIO_NULL, HIO_FEATURE_ALL, 512, HIO_NULL);
+	if (!hio)
+	{
+		printf ("Cannot open hio\n");
+		return -1;
+	}
+
+	{
+		hio_json_t* json = HIO_NULL;
+		char buf[128];
+		hio_oow_t rem;
+		size_t size;
+
+		json = hio_json_open(hio, 0);
+
+		hio_json_setoption (json, o);
+		hio_json_setinstcb (json, on_json_inst, HIO_NULL);
+
+		rem = 0;
+		while (!feof(stdin) || rem > 0)
+		{
+			int x;
+
+			if (!feof(stdin))
+			{
+				size = fread(&buf[rem], 1, sizeof(buf) - rem, stdin);
+				if (size <= 0) break;
+			}
+			else
+			{
+				size = rem;
+				rem = 0;
+			}
+
+			if ((x = hio_json_feed(json, buf, size + rem, &rem, 1)) <= -1) 
+			{
+				hio_logbfmt (hio, HIO_LOG_STDOUT, "**** ERROR - %js ****\n", hio_geterrmsg(hio));
+				goto done;
+			}
+
+			if (x > 0)
+			{
+				/* document completed.
+				 * if only whitespaces are given, x is still greater 0. */
+				hio_logbfmt (hio, HIO_LOG_STDOUT, "\n-----------------------------------\n");
+			}
+
+			/*printf ("--> x %d input %d left-over %d => [%.*s]\n", (int)x, (int)size, (int)rem, (int)rem, &buf[size - rem]);*/
+			if  (rem > 0) memcpy (buf, &buf[size - rem], rem);
+		}
+
+hio_logbfmt (hio, HIO_LOG_STDOUT, "\n");
+		if (json->state_stack != &json->state_top) hio_logbfmt (hio, HIO_LOG_STDOUT, "**** ERROR - incomplete ****\n");
+
+	done:
+		hio_json_close (json);
+	}
+
+	hio_logbfmt (hio, HIO_LOG_STDOUT, "\n===================================\n");
+
+	{
+		hio_jsonwr_t* jsonwr = HIO_NULL;
+		hio_uch_t ddd[4] = { 'D', '\0', 'R', 'Q' };
+		hio_uch_t ddv[5] = { L'밝', L'혀', L'졌', L'는', L'데' };
+	
+		jsonwr = hio_jsonwr_open (hio, 0, HIO_JSONWR_FLAG_PRETTY);
+
+		hio_jsonwr_setwritecb (jsonwr, write_json_element, HIO_NULL);
+
+		hio_jsonwr_startarray (jsonwr);
+		
+			hio_jsonwr_writestringwithbchars (jsonwr, "hello", 5);
+			hio_jsonwr_writestringwithbchars (jsonwr, "world", 5);
+
+			hio_jsonwr_startobject (jsonwr);
+				hio_jsonwr_writekeywithbchars (jsonwr, "abc", 3);
+				hio_jsonwr_writestringwithbchars (jsonwr, "computer", 8);
+				hio_jsonwr_writekeywithbchars (jsonwr, "k", 1);
+				hio_jsonwr_writestringwithbchars (jsonwr, "play nice", 9);
+				hio_jsonwr_writekeywithuchars (jsonwr, ddd, 4);
+				hio_jsonwr_writestringwithuchars (jsonwr, ddv, 5);
+			hio_jsonwr_endobject (jsonwr);
+
+			hio_jsonwr_writestringwithbchars (jsonwr, "tyler", 5);
+
+			hio_jsonwr_startarray (jsonwr);
+				hio_jsonwr_writestringwithbchars (jsonwr, "airplain", 8);
+				hio_jsonwr_writestringwithbchars (jsonwr, "gro\0wn\nup", 9);
+				hio_jsonwr_writetrue (jsonwr);
+			hio_jsonwr_endarray (jsonwr);
+
+		hio_jsonwr_endarray (jsonwr);
+
+		hio_jsonwr_close (jsonwr);
+	}
+
+	hio_close (hio);
+
+	return 0;
+
+}
+

bin/t04.c

@@ -0,0 +1,320 @@
+#include <hio.h>
+
+#if defined(HIO_ENABLE_MARIADB)
+
+#include <hio-mar.h>
+#include <stdio.h>
+#include <string.h>
+#include <signal.h>
+
+#if 0
+#include <mariadb/mysql.h>
+#else
+#include <mysql.h>
+#endif
+
+#if 0
+static void mar_on_disconnect (hio_dev_mar_t* dev)
+{
+}
+
+static void mar_on_connect (hio_dev_mar_t* dev)
+{
+printf ("CONNECTED...\n");
+	if (hio_dev_mar_querywithbchars(dev, "SHOW STATUS", 11) <= -1)
+	{
+		hio_dev_mar_halt (dev);
+	}
+}
+
+static void mar_on_query_started (hio_dev_mar_t* dev, int mar_ret, const hio_bch_t* mar_errmsg)
+{
+	if (mar_ret != 0)
+	{
+printf ("QUERY NOT SENT PROPERLY..%s\n", mysql_error(dev->hnd));
+	}
+	else
+	{
+printf ("QUERY SENT..\n");
+		if (hio_dev_mar_fetchrows(dev) <= -1)
+		{
+printf ("FETCH ROW FAILURE - %s\n", errmsg);
+			hio_dev_mar_halt (dev);
+		}
+	}
+}
+
+static void mar_on_row_fetched (hio_dev_mar_t* dev, void* data)
+{
+	MYSQL_ROW row = (MYSQL_ROW)data;
+	static int x = 0;
+	if (!row) 
+	{
+		printf ("NO MORE ROW..\n");
+		if (x == 0 && hio_dev_mar_querywithbchars(dev, "SELECT * FROM pdns.records", 26) <= -1) hio_dev_mar_halt (dev);
+		x++;
+	}
+	else
+	{
+		if (x == 0)
+			printf ("%s %s\n", row[0], row[1]);
+		else if (x == 1)
+			printf ("%s %s %s %s %s\n", row[0], row[1], row[2], row[3], row[4]);
+		//printf ("GOT ROW\n");
+	}
+}
+
+int main (int argc, char* argv[])
+{
+
+	hio_t* hio = HIO_NULL;
+	hio_dev_mar_t* mar;
+	hio_dev_mar_make_t mi;
+	hio_dev_mar_connect_t ci;
+
+	if (argc != 6)
+	{
+		fprintf (stderr, "Usage: %s ipaddr port username password dbname\n", argv[0]);
+		return -1;
+	}
+
+	hio = hio_open(HIO_NULL, 0, HIO_NULL, HIO_FEATURE_ALL, 512, HIO_NULL);
+	if (!hio)
+	{
+		printf ("Cannot open hio\n");
+		goto oops;
+	}
+
+	memset (&ci, 0, HIO_SIZEOF(ci));
+	ci.host = argv[1];
+	ci.port = 3306; /* TODO: argv[2]; */
+	ci.username = argv[3];
+	ci.password = argv[4];
+	ci.dbname = argv[5];
+
+	memset (&mi, 0, HIO_SIZEOF(mi));
+	/*mi.on_write = mar_on_write;
+	mi.on_read = mar_on_read;*/
+	mi.on_connect = mar_on_connect;
+	mi.on_disconnect = mar_on_disconnect;
+	mi.on_query_started = mar_on_query_started;
+	mi.on_row_fetched = mar_on_row_fetched;
+
+	mar = hio_dev_mar_make(hio, 0, &mi);
+	if (!mar)
+	{
+		printf ("Cannot make a mar db client device\n");
+		goto oops;
+	}
+
+	if (hio_dev_mar_connect(mar, &ci) <= -1)
+	{
+		printf ("Cannot connect to mar db server\n");
+		goto oops;
+	}
+
+	hio_loop (hio);
+
+oops:
+	if (hio) hio_close (hio);
+	return 0;
+}
+#endif
+
+static void on_result (hio_svc_marc_t* svc, hio_oow_t sid, hio_svc_marc_rcode_t rcode, void* data, void* qctx)
+{
+static int x = 0;
+	switch (rcode)
+	{
+		case HIO_SVC_MARC_RCODE_ROW:
+		{
+			MYSQL_ROW row = (MYSQL_ROW)data;
+//		if (x == 0)
+			printf ("[%lu] %s %s\n", sid, row[0], row[1]);
+//		else if (x == 1)
+//			printf ("%s %s %s %s %s\n", row[0], row[1], row[2], row[3], row[4]);
+		//printf ("GOT ROW\n");
+#if 0
+x++;
+if (x == 1)
+{
+printf ("BLOCKING PACKET...........................\n");
+system ("/sbin/iptables -I OUTPUT -p tcp --dport 3306 -j REJECT");
+system ("/sbin/iptables -I INPUT -p tcp --sport 3306 -j REJECT");
+}
+#endif
+			break;
+		}
+
+		case HIO_SVC_MARC_RCODE_DONE:
+printf ("[%lu] NO DATA..\n", sid);
+			break;
+
+		case HIO_SVC_MARC_RCODE_ERROR:
+		{
+			hio_svc_marc_dev_error_t* err = (hio_svc_marc_dev_error_t*)data;
+			printf ("QUERY ERROR - [%d] %s\n", err->mar_errcode, err->mar_errmsg); 
+			break;
+		}
+	}
+}
+
+static hio_t* g_hio = HIO_NULL;
+
+static void handle_signal (int sig)
+{
+	hio_stop (g_hio, HIO_STOPREQ_TERMINATION);
+}
+
+static void send_test_query (hio_t* hio, const hio_ntime_t* now, hio_tmrjob_t* job)
+{
+	hio_svc_marc_t* marc = (hio_svc_marc_t*)job->ctx;
+	hio_bch_t buf[256];
+	hio_bch_t tmp[256];
+	int len;
+
+	HIO_INFO0 (hio, "ATTEMPTING TO SEND QUERY\n");
+	if (hio_svc_marc_querywithbchars(marc, 0, HIO_SVC_MARC_QTYPE_SELECT, "SHOW STATUS", 11, on_result, HIO_NULL) <= -1)
+	{
+		HIO_INFO1 (hio, "FAILED TO SEND QUERY - %js\n", hio_geterrmsg(hio));
+	}
+
+	hio_svc_marc_escapebchars (marc, "wild", 4, tmp);
+	len = snprintf(buf, HIO_COUNTOF(buf), "SELECT name, content FROM records WHERE name like '%%%s%%'", tmp);
+	if (hio_svc_marc_querywithbchars(marc, 1, HIO_SVC_MARC_QTYPE_SELECT, buf, len, on_result, HIO_NULL) <= -1)
+	{
+		HIO_INFO1 (hio, "FAILED TO SEND QUERY - %js\n", hio_geterrmsg(hio));
+	}
+}
+
+static int schedule_timer_job_after (hio_t* hio, const hio_ntime_t* fire_after, hio_tmrjob_handler_t handler, void* ctx)
+{
+	hio_tmrjob_t tmrjob;
+
+	memset (&tmrjob, 0, HIO_SIZEOF(tmrjob));
+	tmrjob.ctx = ctx;
+
+	hio_gettime (hio, &tmrjob.when);
+	HIO_ADD_NTIME (&tmrjob.when, &tmrjob.when, fire_after);
+
+	tmrjob.handler = handler;
+	tmrjob.idxptr = HIO_NULL;
+
+	return hio_instmrjob(hio, &tmrjob);
+}
+
+
+int main (int argc, char* argv[])
+{
+
+	hio_t* hio = HIO_NULL;
+	hio_svc_marc_t* marc;
+	hio_svc_marc_connect_t ci;
+	hio_svc_marc_tmout_t tmout;
+
+	if (argc != 6)
+	{
+		fprintf (stderr, "Usage: %s ipaddr port username password dbname\n", argv[0]);
+		return -1;
+	}
+
+	hio = hio_open(HIO_NULL, 0, HIO_NULL, HIO_FEATURE_ALL, 512, HIO_NULL);
+	if (!hio)
+	{
+		printf ("Cannot open hio\n");
+		goto oops;
+	}
+
+	memset (&ci, 0, HIO_SIZEOF(ci));
+	ci.host = argv[1];
+	ci.port = 3306; /* TODO: argv[2]; */
+	ci.username = argv[3];
+	ci.password = argv[4];
+	ci.dbname = argv[5];
+
+	memset (&tmout, 0, HIO_SIZEOF(tmout));
+	HIO_INIT_NTIME (&tmout.c, 4,  0);
+	HIO_INIT_NTIME (&tmout.r, -1,  0);
+	HIO_INIT_NTIME (&tmout.w, -1,  0);
+	marc = hio_svc_marc_start(hio, &ci, &tmout, HIO_NULL);
+	/*marc = hio_svc_marc_start(hio, &ci, HIO_NULL, HIO_NULL);*/
+	if (!marc)
+	{
+		printf ("Cannot start a mariadb client service\n");
+		goto oops;
+	}
+
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_SELECT, "SHOW STATUS", 11, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM", 11, on_result, HIO_NULL);
+//	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_SELECT, "SHOW STATUS", 11, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM XXX", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM ZZZ", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM TTT", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM QQQ", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 4 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 10 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 10 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+	hio_svc_marc_querywithbchars (marc, 10 | HIO_SVC_MARC_SID_FLAG_AUTO_BOUNDED, HIO_SVC_MARC_QTYPE_ACTION, "DELETE FROM RRR", 14, on_result, HIO_NULL);
+
+#if 0
+	memset (&mi, 0, HIO_SIZEOF(mi));
+	/*mi.on_write = mar_on_write;
+	mi.on_read = mar_on_read;*/
+	mi.on_connect = mar_on_connect;
+	mi.on_disconnect = mar_on_disconnect;
+	mi.on_query_started = mar_on_query_started;
+	mi.on_row_fetched = mar_on_row_fetched;
+
+	mar = hio_dev_mar_make(hio, 0, &mi);
+	if (!mar)
+	{
+		printf ("Cannot make a mar db client device\n");
+		goto oops;
+	}
+
+	if (hio_dev_mar_connect(mar, &ci) <= -1)
+	{
+		printf ("Cannot connect to mar db server\n");
+		goto oops;
+	}
+#endif
+
+	g_hio = hio;
+	signal (SIGINT, handle_signal);
+
+	/* ---------------------------------------- */
+	{
+		hio_ntime_t x;
+		HIO_INIT_NTIME (&x, 20, 0);
+		schedule_timer_job_after (hio, &x, send_test_query, marc);
+		hio_loop (hio);
+	}
+	/* ---------------------------------------- */
+
+	signal (SIGINT, SIG_IGN);
+	g_hio = HIO_NULL;
+
+oops:
+printf ("about to close hio...\n");
+	if (hio) hio_close (hio);
+	return 0;
+}
+
+
+
+
+#else
+
+#include <stdio.h>
+int main (int argc, char* argv[])
+{
+	printf ("mariadb not enabled\n");
+	return 0;
+}
+#endif

bin/t05.c

@@ -0,0 +1,88 @@
+#include <hio-sck.h>
+#include <hio-http.h>
+#include <hio-pty.h>
+#include <hio-utl.h>
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <signal.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdlib.h>
+
+static hio_t* g_hio = HIO_NULL;
+
+static void handle_sigint (int sig)
+{
+	if (g_hio) hio_stop (g_hio, HIO_STOPREQ_TERMINATION);
+}
+
+int pty_on_read (hio_dev_pty_t* dev, const void* data, hio_iolen_t len)
+{
+	hio_iolen_t i;
+	for (i = 0; i < len; i++) fputc(*((char*)data + i), stdout);
+	return 0;
+}
+
+int pty_on_write (hio_dev_pty_t* dev, hio_iolen_t wrlen, void*  wrctx)
+{
+	return 0;
+}
+
+void pty_on_close (hio_dev_pty_t* dev)
+{
+	printf (">> pty closed....\n");
+}
+
+
+int main (int argc, char* argv[])
+{
+	hio_t* hio = HIO_NULL;
+	hio_dev_pty_t* pty;
+	hio_dev_pty_make_t pi;
+	struct sigaction sigact;
+	int xret = -1;
+
+	memset (&sigact, 0, HIO_SIZEOF(sigact));
+	sigact.sa_handler = SIG_IGN;
+	sigaction (SIGPIPE, &sigact, HIO_NULL);
+
+	memset (&sigact, 0, HIO_SIZEOF(sigact));
+	sigact.sa_handler = handle_sigint;
+	sigaction (SIGINT, &sigact, HIO_NULL);
+	
+	hio = hio_open(HIO_NULL, 0, HIO_NULL, HIO_FEATURE_ALL, 512, HIO_NULL);
+	if (!hio)
+	{
+		printf ("Cannot open hio\n");
+		goto oops;
+	}
+
+	hio_setoption (hio, HIO_LOG_TARGET_BCSTR, "/dev/stderr");
+
+	memset (&pi, 0, HIO_SIZEOF(pi));
+	pi.cmd = "/bin/ls -laF /etc";
+	pi.flags = HIO_DEV_PTY_SHELL;
+	pi.on_write = pty_on_write;
+	pi.on_read = pty_on_read;
+	pi.on_close = pty_on_close; 
+	pty = hio_dev_pty_make(hio, 0, &pi);
+	if (!pty) goto oops;
+
+	g_hio = hio;
+
+	hio_loop (hio);
+
+	xret = 0;
+
+oops:
+
+	memset (&sigact, 0, HIO_SIZEOF(sigact));
+	sigact.sa_handler = SIG_IGN;
+	sigaction (SIGINT, &sigact, HIO_NULL);
+
+	if (hio) hio_close (hio);
+	return xret;
+}
+

bin/t06.c

@@ -0,0 +1,692 @@
+#include <hio-sck.h>
+#include <hio-http.h>
+#include <hio-dhcp.h>
+#include <hio-utl.h>
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <signal.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#define MAX_NUM_THRS 256
+static int g_num_thrs = 2;
+static hio_svc_htts_t* g_htts[MAX_NUM_THRS];
+static int g_htts_no = 0;
+static pthread_mutex_t g_htts_mutex = PTHREAD_MUTEX_INITIALIZER;
+static int g_dev_type4 = HIO_DEV_SCK_TCP4;
+static int g_dev_type6 = HIO_DEV_SCK_TCP6;
+
+static int print_qparam (hio_bcs_t* key, hio_bcs_t* val, void* ctx)
+{
+	key->len = hio_perdec_http_bcs(key, key->ptr, HIO_NULL);
+	val->len = hio_perdec_http_bcs(val, val->ptr, HIO_NULL);
+	fprintf ((FILE*)ctx, "\t[%.*s] = [%.*s]\n", (int)key->len, key->ptr, (int)val->len, val->ptr);
+	return 0;
+}
+
+static void on_htts_thr_request (hio_t* hio, hio_dev_thr_iopair_t* iop, hio_svc_htts_thr_func_info_t* tfi, void* ctx)
+{
+	FILE* fp;
+	int i;
+
+	if (tfi->req_method != HIO_HTTP_GET)
+	{
+		write (iop->wfd, "Status: 405\r\n\r\n", 15); /* method not allowed */
+		return;
+	}
+
+	fp = fdopen(iop->wfd, "w");
+	if (!fp)
+	{
+		write (iop->wfd, "Status: 500\r\n\r\n", 15); /* internal server error */
+		return;
+	}
+
+	fprintf (fp, "Status: 200\r\n");
+	fprintf (fp, "Content-Type: text/html\r\n\r\n");
+
+	fprintf (fp, "request path = %s\n", tfi->req_path);
+	if (tfi->req_param) 
+	{
+		fprintf (fp, "request params:\n");
+		hio_scan_http_qparam (tfi->req_param, print_qparam, fp);
+	}
+	for (i = 0; i < 100; i++) fprintf (fp, "%d * %d => %d\n", i, i, i * i);
+
+	/* invalid iop->wfd to mark that this function closed this file descriptor. 
+	 * no invalidation will lead to double closes on the same file descriptor. */
+	iop->wfd = HIO_SYSHND_INVALID; 
+	fclose (fp);
+}
+
+static void on_htts_thr2_request (hio_t* hio, hio_dev_thr_iopair_t* iop, hio_svc_htts_thr_func_info_t* tfi, void* ctx)
+{
+	FILE* fp, * sf;
+
+	if (tfi->req_method != HIO_HTTP_GET)
+	{
+		write (iop->wfd, "Status: 405\r\n\r\n", 15); /* method not allowed */
+		return;
+	}
+
+	fp = fdopen(iop->wfd, "w");
+	if (!fp)
+	{
+		write (iop->wfd, "Status: 500\r\n\r\n", 15); /* internal server error */
+		return;
+	}
+
+	sf = fopen(&tfi->req_path[5],  "r");
+	if (!sf)
+	{
+		fprintf (fp, "Status: 404\r\n\r\n");
+	}
+	else
+	{
+		char buf[4096];
+
+		fprintf (fp, "Status: 200\r\n");
+		fprintf (fp, "Content-Type: text/html\r\n\r\n");
+
+		while (!feof(sf) && !ferror(sf))
+		{
+			size_t n;
+			n = fread(buf, 1, sizeof(buf), sf);
+			if (n > 0) fwrite (buf, 1, n, fp);
+		}
+
+		fclose (sf);
+	}
+
+	/* invalid iop->wfd to mark that this function closed this file descriptor. 
+	 * no invalidation will lead to double closes on the same file descriptor. 
+	 * the hio library attempt to close it if it's not INVALID after this handler. */
+	iop->wfd = HIO_SYSHND_INVALID; 
+	fclose (fp);
+}
+
+/* ========================================================================= */
+int process_http_request (hio_svc_htts_t* htts, hio_dev_sck_t* csck, hio_htre_t* req)
+{
+	hio_t* hio = hio_svc_htts_gethio(htts);
+//	hio_svc_htts_cli_t* cli = hio_dev_sck_getxtn(csck);
+	hio_http_method_t mth;
+
+	/* percent-decode the query path to the original buffer
+	 * since i'm not going to need it in the original form
+	 * any more. once it's decoded in the peek mode,
+	 * the decoded query path is made available in the
+	 * non-peek mode as well */
+
+	HIO_DEBUG2 (hio, "[RAW-REQ] %s %s\n", hio_htre_getqmethodname(req), hio_htre_getqpath(req));
+
+	hio_htre_perdecqpath(req);
+	/* TODO: proper request logging */
+
+	HIO_DEBUG2 (hio, "[REQ] %s %s\n", hio_htre_getqmethodname(req), hio_htre_getqpath(req));
+
+#if 0
+hio_printf (HIO_T("================================\n"));
+hio_printf (HIO_T("[%lu] %hs REQUEST ==> [%hs] version[%d.%d %hs] method[%hs]\n"),
+	(unsigned long)time(NULL),
+	(peek? HIO_MT("PEEK"): HIO_MT("HANDLE")),
+	hio_htre_getqpath(req),
+	hio_htre_getmajorversion(req),
+	hio_htre_getminorversion(req),
+	hio_htre_getverstr(req),
+	hio_htre_getqmethodname(req)
+);
+if (hio_htre_getqparam(req))
+	hio_printf (HIO_T("PARAMS ==> [%hs]\n"), hio_htre_getqparam(req));
+
+hio_htb_walk (&req->hdrtab, walk, HIO_NULL);
+if (hio_htre_getcontentlen(req) > 0)
+{
+	hio_printf (HIO_T("CONTENT [%.*S]\n"), (int)hio_htre_getcontentlen(req), hio_htre_getcontentptr(req));
+}
+#endif
+
+	mth = hio_htre_getqmethodtype(req);
+	/* determine what to do once the header fields are all received.
+	 * i don't want to delay this until the contents are received.
+	 * if you don't like this behavior, you must implement your own
+	 * callback function for request handling. */
+#if 0
+	/* TODO support X-HTTP-Method-Override */
+	if (data.method == HIO_HTTP_POST)
+	{
+		tmp = hio_htre_getheaderval(req, HIO_MT("X-HTTP-Method-Override"));
+		if (tmp)
+		{
+			/*while (tmp->next) tmp = tmp->next;*/ /* get the last value */
+			data.method = hio_mbstohttpmethod (tmp->ptr);
+		}
+	}
+#endif
+
+#if 0
+	if (mth == HIO_HTTP_CONNECT)
+	{
+		/* CONNECT method must not have content set. 
+		 * however, arrange to discard it if so. 
+		 *
+		 * NOTE: CONNECT is implemented to ignore many headers like
+		 *       'Expect: 100-continue' and 'Connection: keep-alive'. */
+		hio_htre_discardcontent (req);
+	}
+	else 
+	{
+/* this part can be checked in actual hio_svc_htts_doXXX() functions.
+ * some doXXX handlers may not require length for POST.
+ * it may be able to simply accept till EOF? or  treat as if CONTENT_LENGTH is 0*/
+		if (mth == HIO_HTTP_POST && !(req->flags & (HIO_HTRE_ATTR_LENGTH | HIO_HTRE_ATTR_CHUNKED)))
+		{
+			/* POST without Content-Length nor not chunked */
+			hio_htre_discardcontent (req); 
+			/* 411 Length Required - can't keep alive. Force disconnect */
+			req->flags &= ~HIO_HTRE_ATTR_KEEPALIVE; /* to cause sendstatus() to close */
+			if (hio_svc_htts_sendstatus(htts, csck, req, 411, HIO_NULL) <= -1) goto oops;
+		}
+		else
+
+#endif
+		{
+			const hio_bch_t* qpath = hio_htre_getqpath(req);
+			int x;
+			if (hio_comp_bcstr_limited(qpath, "/thr/", 5, 1) == 0)
+				x = hio_svc_htts_dothr(htts, csck, req, on_htts_thr_request, HIO_NULL);
+			else if (hio_comp_bcstr_limited(qpath, "/thr2/", 6, 1) == 0)
+				x = hio_svc_htts_dothr(htts, csck, req, on_htts_thr2_request, HIO_NULL);
+			else if (hio_comp_bcstr_limited(qpath, "/txt/", 5, 1) == 0)
+				x = hio_svc_htts_dotxt(htts, csck, req, 200, "text/plain", qpath);
+			else if (hio_comp_bcstr_limited(qpath, "/cgi/", 5, 1) == 0)
+				x = hio_svc_htts_docgi(htts, csck, req, "", qpath + 4);
+			else if (hio_comp_bcstr_limited(qpath, "/fcgi/", 5, 1) == 0)
+			{
+				hio_skad_t fcgis_addr;
+				hio_bcstrtoskad(hio, "127.0.0.1:9000", &fcgis_addr);
+				x = hio_svc_htts_dofcgi(htts, csck, req, &fcgis_addr);
+			}
+			else
+				x = hio_svc_htts_dofile(htts, csck, req, "", qpath, "text/plain");
+			if (x <= -1) goto oops;
+		}
+#if 0
+	}
+#endif
+
+	return 0;
+
+oops:
+	hio_dev_sck_halt (csck);
+	return -1;
+}
+
+void* thr_func (void* arg)
+{
+	hio_t* hio = HIO_NULL;
+	hio_svc_htts_t* htts = HIO_NULL;
+	hio_dev_sck_bind_t htts_bind_info[2];
+	int htts_no = -1;
+
+	hio = hio_open(HIO_NULL, 0, HIO_NULL, HIO_FEATURE_ALL, 512, HIO_NULL);
+	if (!hio)
+	{
+		printf ("Cannot open hio\n");
+		goto oops;
+	}
+
+	hio_setoption (hio, HIO_LOG_TARGET_BCSTR, "/dev/stderr");
+
+	memset (&htts_bind_info, 0, HIO_SIZEOF(htts_bind_info));
+	hio_skad_init_for_qx (&htts_bind_info[0].localaddr);
+
+	hio_bcstrtoskad (hio, "0.0.0.0:9988", &htts_bind_info[1].localaddr);
+	htts_bind_info[1].options = HIO_DEV_SCK_BIND_REUSEADDR | HIO_DEV_SCK_BIND_REUSEPORT | HIO_DEV_SCK_BIND_IGNERR;
+#if 0
+	htts_bind_info[1].options |= HIO_DEV_SCK_BIND_SSL; 
+	htts_bind_info[1].ssl_certfile = "localhost.crt";
+	htts_bind_info[1].ssl_keyfile = "localhost.key";
+#endif
+
+	htts = hio_svc_htts_start(hio, htts_bind_info, HIO_COUNTOF(htts_bind_info), process_http_request);
+	if (!htts) 
+	{
+		printf ("Unable to start htts\n");
+		goto oops;
+	}
+
+	pthread_mutex_lock (&g_htts_mutex);
+	htts_no = g_htts_no;
+	g_htts[htts_no] = htts;
+	g_htts_no = (g_htts_no + 1) % g_num_thrs;
+	pthread_mutex_unlock (&g_htts_mutex);
+
+	hio_loop (hio);
+
+oops:
+	pthread_mutex_lock (&g_htts_mutex);
+	if (htts) 
+	{
+		hio_svc_htts_stop (htts);
+		g_htts[htts_no] = HIO_NULL;
+	}
+	pthread_mutex_unlock (&g_htts_mutex);
+	if (hio) hio_close (hio);
+
+	pthread_exit (HIO_NULL);
+	return HIO_NULL;
+}
+
+
+/* ========================================================================= */
+
+static void tcp_sck_on_disconnect (hio_dev_sck_t* tcp)
+{
+	switch (HIO_DEV_SCK_GET_PROGRESS(tcp))
+	{
+		case HIO_DEV_SCK_CONNECTING:
+			HIO_INFO1 (tcp->hio, "OUTGOING SESSION DISCONNECTED - FAILED TO CONNECT (%d) TO REMOTE SERVER\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_CONNECTING_SSL:
+			HIO_INFO1 (tcp->hio, "OUTGOING SESSION DISCONNECTED - FAILED TO SSL-CONNECT (%d) TO REMOTE SERVER\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_LISTENING:
+			HIO_INFO1 (tcp->hio, "SHUTTING DOWN THE SERVER SOCKET(%d)...\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_CONNECTED:
+			HIO_INFO1 (tcp->hio, "OUTGOING CLIENT CONNECTION GOT TORN DOWN(%d).......\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_ACCEPTING_SSL:
+			HIO_INFO1 (tcp->hio, "INCOMING SSL-ACCEPT GOT DISCONNECTED(%d) ....\n", (int)tcp->hnd);
+			break;
+
+		case HIO_DEV_SCK_ACCEPTED:
+			HIO_INFO1 (tcp->hio, "INCOMING CLIENT BEING SERVED GOT DISCONNECTED(%d).......\n", (int)tcp->hnd);
+			break;
+
+		default:
+			HIO_INFO2 (tcp->hio, "SOCKET DEVICE DISCONNECTED (%d - %x)\n", (int)tcp->hnd, (unsigned int)tcp->state);
+			break;
+	}
+}
+
+static void tcp_sck_on_connect (hio_dev_sck_t* tcp)
+{
+	hio_bch_t buf1[128], buf2[128];
+
+	hio_skadtobcstr (tcp->hio, &tcp->localaddr, buf1, HIO_COUNTOF(buf1), HIO_SKAD_TO_BCSTR_ADDR | HIO_SKAD_TO_BCSTR_PORT);
+	hio_skadtobcstr (tcp->hio, &tcp->remoteaddr, buf2, HIO_COUNTOF(buf2), HIO_SKAD_TO_BCSTR_ADDR | HIO_SKAD_TO_BCSTR_PORT);
+
+	if (tcp->state & HIO_DEV_SCK_CONNECTED)
+	{
+		HIO_INFO3 (tcp->hio, "DEVICE connected to a remote server... LOCAL %hs REMOTE %hs SCK: %d\n", buf1, buf2, tcp->hnd);
+	}
+	else if (tcp->state & HIO_DEV_SCK_ACCEPTED)
+	{
+		/* TODO: pass it to distributor??? */
+/* THIS PART WON"T BE CALLED FOR tcp_sck_on_raw_accept.. */
+	}
+}
+
+
+static hio_tmridx_t xx_tmridx;
+static int try_to_accept (hio_dev_sck_t* sck, hio_dev_sck_qxmsg_t* qxmsg, int in_mq);
+
+typedef struct xx_mq_t xx_mq_t;
+
+struct xx_mq_t
+{
+	xx_mq_t*    q_next;
+	xx_mq_t*    q_prev;
+
+	hio_dev_sck_qxmsg_t msg;
+};
+
+#define XX_MQ_INIT(mq) ((mq)->q_next = (mq)->q_prev = (mq))
+#define XX_MQ_TAIL(mq) ((mq)->q_prev)
+#define XX_MQ_HEAD(mq) ((mq)->q_next)
+#define XX_MQ_IS_EMPTY(mq) (XX_MQ_HEAD(mq) == (mq))
+#define XX_MQ_IS_NODE(mq,x) ((mq) != (x))
+#define XX_MQ_IS_HEAD(mq,x) (XX_MQ_HEAD(mq) == (x))
+#define XX_MQ_IS_TAIL(mq,x) (XX_MQ_TAIL(mq) == (x))
+#define XX_MQ_NEXT(x) ((x)->q_next)
+#define XX_MQ_PREV(x) ((x)->q_prev)
+#define XX_MQ_LINK(p,x,n) HIO_Q_LINK((hio_q_t*)p,(hio_q_t*)x,(hio_q_t*)n)
+#define XX_MQ_UNLINK(x) HIO_Q_UNLINK((hio_q_t*)x)
+#define XX_MQ_REPL(o,n) HIO_Q_REPL(o,n);
+#define XX_MQ_ENQ(mq,x) XX_MQ_LINK(XX_MQ_TAIL(mq), (hio_q_t*)x, mq)
+#define XX_MQ_DEQ(mq) XX_MQ_UNLINK(XX_MQ_HEAD(mq))
+
+static xx_mq_t xx_mq;
+
+static void enable_accept (hio_t* hio, const hio_ntime_t* now, hio_tmrjob_t* job)
+{
+	hio_dev_sck_t* rdev = (hio_dev_sck_t*)job->ctx;
+
+	while (!XX_MQ_IS_EMPTY(&xx_mq))
+	{
+		xx_mq_t* mq;
+	       
+		mq = XX_MQ_HEAD(&xx_mq);
+		if (try_to_accept(rdev, &mq->msg, 1) == 0) return; /* EAGAIN situation */
+
+		XX_MQ_UNLINK (mq);
+		hio_freemem (hio, mq);
+	}
+
+	assert (XX_MQ_IS_EMPTY(&xx_mq));
+	if (hio_dev_sck_read(rdev, 1) <= -1) // it's a disaster if this fails. the acceptor will get stalled if it happens
+	{
+printf ("DISASTER.... UNABLE TO ENABLE READ ON ACCEPTOR\n");
+	}
+}
+
+static int try_to_accept (hio_dev_sck_t* sck, hio_dev_sck_qxmsg_t* qxmsg, int in_mq)
+{
+	hio_t* hio = sck->hio;
+	hio_svc_htts_t* htts;
+
+	pthread_mutex_lock (&g_htts_mutex);
+	htts = g_htts[g_htts_no];
+	g_htts_no = (g_htts_no + 1) % g_num_thrs;
+	pthread_mutex_unlock (&g_htts_mutex);
+
+	/* 0: index to the QX socket device (see the the first binding address to hi_svc_htts_start) */
+	if (hio_svc_htts_writetosidechan(htts, 0, qxmsg, HIO_SIZEOF(*qxmsg)) <= -1)
+	{
+		hio_bch_t buf[128];
+
+		if (errno == EAGAIN)
+		{
+//printf ("sidechannel retrying %s\n", strerror(errno));
+
+			if (hio_dev_sck_read(sck, 0) <= -1) goto sidechan_write_error;
+
+			if (!in_mq)
+			{
+				xx_mq_t* mq;
+				mq = hio_allocmem(hio, HIO_SIZEOF(*mq));
+				if (HIO_UNLIKELY(!mq)) goto sidechan_write_error;
+				mq->msg = *qxmsg;
+				XX_MQ_ENQ (&xx_mq, mq);
+			}
+
+			if (xx_tmridx == HIO_TMRIDX_INVALID)
+				hio_schedtmrjobat (hio, HIO_NULL, enable_accept, &xx_tmridx, sck);
+
+			return 0; /* enqueued for later writing */
+		}
+		else
+		{
+			const char* msg;
+		sidechan_write_error:
+//printf ("sidechannel write error errno=%d strerror=%s\n", errno, strerror(errno));
+			hio_skadtobcstr (hio, &qxmsg->remoteaddr, buf, HIO_COUNTOF(buf), HIO_SKAD_TO_BCSTR_ADDR | HIO_SKAD_TO_BCSTR_PORT); 
+			HIO_INFO2 (hio, "unable to handle the accepted connection %ld from %hs\n", (long int)qxmsg->syshnd, buf);
+
+			msg = "HTTP/1.0 503 Service unavailable\r\nConnection: close\r\nContent-Length: 0\r\n\r\n";
+			write (qxmsg->syshnd, msg, strlen(msg));
+	printf ("close %d\n", qxmsg->syshnd);
+			close (qxmsg->syshnd);
+
+			return -1; /* failed to accept */
+		}
+	}
+
+/************************************
+{
+static int sc = 0;
+printf ("sc => %d\n", sc++);
+}
+************************************/
+
+	return 1; /* full success */
+}
+
+static void tcp_sck_on_raw_accept (hio_dev_sck_t* sck, hio_syshnd_t syshnd, hio_skad_t* remoteaddr)
+{
+	/*hio_t* hio = sck->hio;*/
+
+	/* inform the worker of this accepted syshnd */
+	hio_dev_sck_qxmsg_t qxmsg;
+	memset (&qxmsg, 0, HIO_SIZEOF(qxmsg));
+	qxmsg.cmd = HIO_DEV_SCK_QXMSG_NEWCONN;
+	qxmsg.scktype = sck->type;
+	qxmsg.syshnd = syshnd;
+	qxmsg.remoteaddr = *remoteaddr;
+
+	try_to_accept (sck, &qxmsg, 0);
+}
+
+static int tcp_sck_on_write (hio_dev_sck_t* sck, hio_iolen_t wrlen, void* wrctx, const hio_skad_t* dstaddr)
+{
+	/* won't be invoked if tcp.
+	 * invokde if sctp_sp */
+//printf ("wrote back chan %d\n", hio_skad_chan(dstaddr));
+	return 0;
+}
+
+static int tcp_sck_on_read (hio_dev_sck_t* sck, const void* buf, hio_iolen_t len, const hio_skad_t* srcaddr)
+{
+	/* won't be invoked 
+	 * invokde if sctp_sp */
+#if 0
+	hio_iovec_t iov;
+
+/* the code here is invoked on a seqpacket socket. .. this part not ready. will rewrite if the core support is done */
+printf ("[%.*s] chan %d\n", (int)len, buf, hio_skad_chan(srcaddr));
+iov.iov_ptr = buf;
+iov.iov_len = len;
+hio_skad_set_scope_id (srcaddr, 3);
+hio_dev_sck_writev (sck, &iov, 1, HIO_NULL, srcaddr);
+#endif
+
+	return 0;
+}
+
+static int add_listener (hio_t* hio, hio_bch_t* addrstr)
+{
+	hio_dev_sck_make_t mi;
+	hio_dev_sck_t* tcp;
+	hio_dev_sck_bind_t bi;
+	hio_dev_sck_listen_t li;
+	int f;
+
+	memset (&bi, 0, HIO_SIZEOF(bi));
+	if (hio_bcstrtoskad(hio, addrstr, &bi.localaddr) <= -1)
+	{
+		HIO_INFO1 (hio, "invalid listening address - %hs\n", addrstr);
+		return -1;
+	}
+	bi.options = HIO_DEV_SCK_BIND_REUSEADDR /*| HIO_DEV_SCK_BIND_REUSEPORT |*/;
+	bi.options |= HIO_DEV_SCK_BIND_IGNERR;
+#if defined(USE_SSL)
+	bi.options |= HIO_DEV_SCK_BIND_SSL; 
+	bi.ssl_certfile = "localhost.crt";
+	bi.ssl_keyfile = "localhost.key";
+#endif
+
+	memset (&mi, 0, HIO_SIZEOF(mi));
+	f = hio_skad_get_family(&bi.localaddr);
+	if (f == HIO_AF_INET) mi.type = g_dev_type4;
+	else if (f == HIO_AF_INET6) mi.type = g_dev_type6;
+	else if (f == HIO_AF_UNIX) mi.type = HIO_DEV_SCK_UNIX;
+	else
+	{
+		HIO_INFO1 (hio, "unsupported address type - %hs\n", addrstr);
+		return -1;
+	}
+
+	mi.options = HIO_DEV_SCK_MAKE_LENIENT;
+	mi.on_write = tcp_sck_on_write;
+	mi.on_read = tcp_sck_on_read;
+	mi.on_connect = tcp_sck_on_connect; /* this is invoked on a client accept as well */
+	mi.on_disconnect = tcp_sck_on_disconnect;
+	mi.on_raw_accept = tcp_sck_on_raw_accept;
+
+	tcp = hio_dev_sck_make(hio, 0, &mi);
+	if (!tcp)
+	{
+		HIO_INFO2 (hio, "Cannot make tcp for %hs - %js\n", addrstr, hio_geterrmsg(hio));
+		return -1;
+	}
+
+	if (hio_dev_sck_bind(tcp, &bi) <= -1)
+	{
+		HIO_INFO2 (hio, "tcp hio_dev_sck_bind() failed with %hs - %js\n", addrstr, hio_geterrmsg(hio));
+		return -1;
+	}
+
+	memset (&li, 0, HIO_SIZEOF(li));
+	li.backlogs = 4096;
+	HIO_INIT_NTIME (&li.accept_tmout, 5, 1);
+	if (hio_dev_sck_listen(tcp, &li) <= -1)
+	{
+		HIO_INFO2 (hio, "tcp hio_dev_sck_listen() failed on %hs - %js\n", addrstr, hio_geterrmsg(hio));
+		return -1;
+	}
+	else
+	{
+		hio_skad_t skad;
+		hio_bch_t buf[HIO_SKAD_IP_STRLEN + 1];
+		hio_dev_sck_getsockaddr (tcp, &skad);
+		hio_skadtobcstr (hio, &skad, buf, HIO_COUNTOF(buf), HIO_SKAD_TO_BCSTR_ADDR | HIO_SKAD_TO_BCSTR_PORT);
+		HIO_INFO1 (hio, "main listener on %hs\n", buf);
+	}
+
+	return 0;
+}
+
+
+static hio_t* g_hio = HIO_NULL;
+
+static void handle_sigint (int sig)
+{
+	if (g_hio) hio_stop (g_hio, HIO_STOPREQ_TERMINATION);
+}
+
+int main (int argc, char* argv[])
+{
+	hio_t* hio = HIO_NULL;
+	pthread_t t[MAX_NUM_THRS];
+	hio_oow_t i;
+	struct sigaction sigact;
+	int xret = -1;
+
+// TODO: use getopt() or something similar
+	for (i = 1; i < argc; )
+	{
+		if (strcmp(argv[i], "-s") == 0)
+		{
+			i++;
+			g_dev_type4 = HIO_DEV_SCK_SCTP4;
+			g_dev_type6 = HIO_DEV_SCK_SCTP6;
+		}
+		else if (strcmp(argv[i], "-ss") == 0)
+		{
+			i++;
+			g_dev_type4 = HIO_DEV_SCK_SCTP4_SP;
+			g_dev_type6 = HIO_DEV_SCK_SCTP6_SP;
+		}
+		else if (strcmp(argv[i], "-t") == 0)
+		{
+			i++;
+			if (i < argc)
+			{
+				g_num_thrs = atoi(argv[i]);
+				if (g_num_thrs < 1 || g_num_thrs > MAX_NUM_THRS)
+				{
+					printf ("Error: %s not allowed for -t\n", argv[i]);
+					return -1;
+				}
+				i++;
+			}
+			else
+			{
+				g_num_thrs = 2;
+			}
+		}
+		else
+		{
+			printf ("Error: invalid argument %s\n", argv[i]);
+			return -1;
+		}
+	}
+
+	memset (&sigact, 0, HIO_SIZEOF(sigact));
+	sigact.sa_handler = SIG_IGN;
+	sigaction (SIGPIPE, &sigact, HIO_NULL);
+
+	memset (&sigact, 0, HIO_SIZEOF(sigact));
+	sigact.sa_handler = handle_sigint;
+	sigaction (SIGINT, &sigact, HIO_NULL);
+	
+
+	XX_MQ_INIT (&xx_mq);
+	xx_tmridx = HIO_TMRIDX_INVALID;
+
+	hio = hio_open(HIO_NULL, 0, HIO_NULL, HIO_FEATURE_ALL, 512, HIO_NULL);
+	if (!hio)
+	{
+		printf ("Cannot open hio\n");
+		goto oops;
+	}
+
+	hio_setoption (hio, HIO_LOG_TARGET_BCSTR, "/dev/stderr");
+
+	g_hio = hio;
+
+	for (i = 0; i < g_num_thrs; i++)
+		pthread_create (&t[i], HIO_NULL, thr_func, hio);
+
+	sleep (1); /* TODO: use pthread_cond_wait()/pthread_cond_signal() or a varialble to see if all threads are up */
+/* TODO: wait until all threads are ready to serve... */
+
+	if (add_listener(hio, "[::]:9987") <= -1 &&
+	    add_listener(hio, "0.0.0.0:9987") <= -1) goto oops; /* as long as 1 listener is alive */
+
+	/* add a unix socket listener. 
+	 * don't check for an error to continue without it in case it fails. */
+	unlink ("t06.sck");
+	add_listener(hio, "@t06.sck");
+
+{
+hio_skad_t skad;
+hio_bcstrtoskad(hio, "[::]:3547", &skad);
+hio_svc_dhcs_start (hio, &skad, 1);
+}
+
+	hio_loop (hio);
+
+	xret = 0;
+
+oops:
+
+	memset (&sigact, 0, HIO_SIZEOF(sigact));
+	sigact.sa_handler = SIG_IGN;
+	sigaction (SIGINT, &sigact, HIO_NULL);
+
+	pthread_mutex_lock (&g_htts_mutex);
+	for (i = 0; i < g_num_thrs; i++)
+	{
+		if (g_htts[i]) hio_stop (hio_svc_htts_gethio(g_htts[i]), HIO_STOPREQ_TERMINATION);
+	}
+	pthread_mutex_unlock (&g_htts_mutex);
+
+	for (i = 0; i < g_num_thrs; i++)
+	{
+		pthread_join (t[i], HIO_NULL);
+	}
+
+	if (hio) hio_close (hio);
+	return xret;
+}
+

bin/te.c

@@ -0,0 +1,420 @@
+/* minimal terminal emulator - based on eduterm (https://www.uninformativ.de/git/eduterm/file/README.html) */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <termios.h>
+#include <unistd.h>
+#include <ctype.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#include <hio-shw.h>
+#include <hio-pty.h>
+
+
+struct X11
+{
+	int fd;
+	Display *dpy;
+	int screen;
+	Window root;
+
+	Window termwin;
+	GC termgc;
+	unsigned long col_fg, col_bg;
+	int w, h;
+
+	XFontStruct *xfont;
+	int font_width, font_height;
+
+	char *buf;
+	int buf_w, buf_h;
+	int buf_x, buf_y;
+};
+
+struct pair_t
+{
+	struct X11* x11;
+	hio_syshnd_t pty;
+};
+
+#if 0
+int term_set_size(struct PTY *pty, struct X11 *x11)
+{
+    struct winsize ws = {
+	   .ws_col = x11->buf_w,
+	   .ws_row = x11->buf_h,
+    };
+
+    /* This is the very same ioctl that normal programs use to query the
+	* window size. Normal programs are actually able to do this, too,
+	* but it makes little sense: Setting the size has no effect on the
+	* PTY driver in the kernel (it just keeps a record of it) or the
+	* terminal emulator. IIUC, all that's happening is that subsequent
+	* ioctls will report the new size -- until another ioctl sets a new
+	* size.
+	*
+	* I didn't see any response to ioctls of normal programs in any of
+	* the popular terminals (XTerm, VTE, st). They are not informed by
+	* the kernel when a normal program issues an ioctl like that.
+	*
+	* On the other hand, if we were to issue this ioctl during runtime
+	* and the size actually changed, child programs would get a
+	* SIGWINCH. */
+    if (ioctl(pty->master, TIOCSWINSZ, &ws) == -1)
+    {
+	   perror("ioctl(TIOCSWINSZ)");
+	   return 0;
+    }
+
+    return 1;
+}
+#endif
+
+void x11_key (XKeyEvent *ev, struct X11* x11, int pty_fd)
+{
+	char buf[32];
+	KeySym ksym;
+	int len;
+
+	len = XLookupString(ev, buf, HIO_SIZEOF(buf), &ksym, 0);
+	if (len > 0) write (pty_fd, buf, len);
+}
+
+void x11_redraw(struct X11 *x11)
+{
+	int x, y;
+	char buf[1];
+
+	XSetForeground(x11->dpy, x11->termgc, x11->col_bg);
+	XFillRectangle(x11->dpy, x11->termwin, x11->termgc, 0, 0, x11->w, x11->h);
+
+	XSetForeground(x11->dpy, x11->termgc, x11->col_fg);
+	for (y = 0; y < x11->buf_h; y++)
+	{
+	#if 0
+		for (x = 0; x < x11->buf_w; x++)
+		{
+			buf[0] = x11->buf[y * x11->buf_w + x];
+			if (!iscntrl(buf[0]))
+			{
+				 XDrawString(x11->dpy, x11->termwin, x11->termgc,
+						x * x11->font_width,
+						y * x11->font_height + x11->xfont->ascent,
+						buf, 1);
+			}
+		}
+	#else
+		XDrawString(x11->dpy, x11->termwin, x11->termgc,
+			0 * x11->font_width,
+			y * x11->font_height + x11->xfont->ascent,
+			&x11->buf[y * x11->buf_w], x11->buf_w);
+	#endif
+    }
+
+	/* draw a cursor */
+	XSetForeground(x11->dpy, x11->termgc, x11->col_fg);
+	XFillRectangle(x11->dpy, x11->termwin, x11->termgc,
+		x11->buf_x * x11->font_width,
+		x11->buf_y * x11->font_height,
+		x11->font_width, x11->font_height);
+
+	XSync(x11->dpy, False);
+	//XFlush (x11->dpy);
+}
+
+int x11_setup(struct X11 *x11)
+{
+	Colormap cmap;
+	XColor color;
+	XSetWindowAttributes wa = {
+		.background_pixmap = ParentRelative,
+		.event_mask = KeyPressMask | KeyReleaseMask | ExposureMask,
+	};
+
+	x11->dpy = XOpenDisplay(NULL);
+	if (x11->dpy == NULL)
+	{
+		fprintf(stderr, "Cannot open display\n");
+		return -1;
+	}
+
+	x11->screen = DefaultScreen(x11->dpy);
+	x11->root = RootWindow(x11->dpy, x11->screen);
+	x11->fd = ConnectionNumber(x11->dpy);
+
+	x11->xfont = XLoadQueryFont(x11->dpy, "fixed");
+	if (x11->xfont == NULL)
+	{
+		fprintf(stderr, "Could not load font\n");
+		return -1;
+	}
+	x11->font_width = XTextWidth(x11->xfont, "m", 1);
+	x11->font_height = x11->xfont->ascent + x11->xfont->descent;
+
+	cmap = DefaultColormap(x11->dpy, x11->screen);
+
+	if (!XAllocNamedColor(x11->dpy, cmap, "#000000", &color, &color))
+	{
+		fprintf(stderr, "Could not load bg color\n");
+		return -1;
+	}
+	x11->col_bg = color.pixel;
+
+	if (!XAllocNamedColor(x11->dpy, cmap, "#aaaaaa", &color, &color))
+	{
+		fprintf(stderr, "Could not load fg color\n");
+		return -1;
+	}
+	x11->col_fg = color.pixel;
+
+    /* The terminal will have a fixed size of 80x25 cells. This is an
+	* arbitrary number. No resizing has been implemented and child
+	* processes can't even ask us for the current size (for now).
+	*
+	* buf_x, buf_y will be the current cursor position. */
+	x11->buf_w = 80;
+	x11->buf_h = 25;
+	x11->buf_x = 0;
+	x11->buf_y = 0;
+	x11->buf = malloc(x11->buf_w * x11->buf_h);
+	if (x11->buf == NULL)
+	{
+		perror("calloc");
+		return -1;
+	}
+	memset (x11->buf, ' ', x11->buf_w * x11->buf_h);
+
+	x11->w = x11->buf_w * x11->font_width;
+	x11->h = x11->buf_h * x11->font_height;
+
+	x11->termwin = XCreateWindow(x11->dpy, x11->root,
+						   0, 0,
+						   x11->w, x11->h,
+						   0,
+						   DefaultDepth(x11->dpy, x11->screen),
+						   CopyFromParent,
+						   DefaultVisual(x11->dpy, x11->screen),
+						   CWBackPixmap | CWEventMask,
+						   &wa);
+	XStoreName(x11->dpy, x11->termwin, "et");
+	XMapWindow(x11->dpy, x11->termwin);
+	x11->termgc = XCreateGC(x11->dpy, x11->termwin, 0, NULL);
+
+	XSync(x11->dpy, False);
+
+    return 0;
+}
+
+void x11_cleanup (struct X11* x11)
+{
+	XFreeGC (x11->dpy, x11->termgc);
+	XDestroyWindow (x11->dpy, x11->termwin);
+	XFreeFont (x11->dpy, x11->xfont);
+	XCloseDisplay (x11->dpy);
+	free (x11->buf);
+}
+
+int pty_on_read (hio_dev_pty_t* dev, const void* data, hio_iolen_t len)
+{
+	hio_iolen_t x;
+	const hio_uint8_t* buf = (const hio_uint8_t*)data;
+	int just_wrapped = 0;
+	struct pair_t* p = hio_dev_pty_getxtn(dev);
+	struct X11* x11 = p->x11;
+
+	for (x = 0; x < len; x++)
+	{
+		if (buf[x] == '\r')
+		{
+			x11->buf_x = 0;
+		}
+		else if (buf[x] == '\b')
+		{
+			if(x11->buf_x > 0) 
+			{
+				x11->buf[x11->buf_y * x11->buf_w + x11->buf_x] = ' ';
+				x11->buf_x--;
+			}
+		}
+		else if (buf[x] == '\7')
+		{
+			/* beep */
+		}
+		else
+		{
+			if (buf[x] != '\n')
+			{
+				/* If this is a regular byte, store it and advance
+				 * the cursor one cell "to the right". This might
+				 * actually wrap to the next line, see below. */
+				x11->buf[x11->buf_y * x11->buf_w + x11->buf_x] = buf[x];
+				x11->buf_x++;
+
+				if (x11->buf_x >= x11->buf_w)
+				{
+					x11->buf_x = 0;
+					x11->buf_y++;
+					just_wrapped = 1;
+				}
+				else
+					just_wrapped = 0;
+			}
+			else if (!just_wrapped)
+			{
+				/* We read a newline and we did *not* implicitly
+				 * wrap to the next line with the last byte we read.
+				 * This means we must *now* advance to the next
+				 * line.
+				 *
+				 * This is the same behaviour that most other
+				 * terminals have: If you print a full line and then
+				 * a newline, they "ignore" that newline. (Just
+				 * think about it: A full line of text could always
+				 * wrap to the next line implicitly, so that
+				 * additional newline could cause the cursor to jump
+				 * to the next line *again*.) */
+				x11->buf_y++;
+				just_wrapped = 0;
+			}
+
+			/* We now check if "the next line" is actually outside
+			 * of the buffer. If it is, we shift the entire content
+			 * one line up and then stay in the very last line.
+			 *
+			 * After the memmove(), the last line still has the old
+			 * content. We must clear it. */
+			if (x11->buf_y >= x11->buf_h)
+			{
+				int i;
+				memmove(x11->buf, &x11->buf[x11->buf_w], x11->buf_w * (x11->buf_h - 1));
+				x11->buf_y = x11->buf_h - 1;
+				for (i = 0; i < x11->buf_w; i++) x11->buf[x11->buf_y * x11->buf_w + i] = ' ';
+			}
+		}
+	}
+
+	x11_redraw (x11);
+	return 0;
+}
+
+int pty_on_write (hio_dev_pty_t* dev, hio_iolen_t wrlen, void*  wrctx)
+{
+	return 0;
+}
+
+void pty_on_close (hio_dev_pty_t* dev)
+{
+	printf (">> pty closed....\n");
+	hio_stop (hio_dev_pty_gethio(dev), HIO_STOPREQ_TERMINATION);
+}
+
+
+int shw_on_ready (hio_dev_shw_t* dev, int events)
+{
+	struct pair_t* p = hio_dev_shw_getxtn(dev);
+	struct X11* x11 = p->x11;
+
+	/* consume data here beforehand. don't let the hio loop
+	 * read the data */
+	XEvent ev;
+	while (XPending(x11->dpy))
+	{
+		XNextEvent(x11->dpy, &ev);
+		switch (ev.type)
+		{
+			case Expose:
+				x11_redraw (x11);
+				break;
+			case KeyPress:
+				x11_key (&ev.xkey, x11, p->pty);
+				break;
+		}
+	}
+
+	/* no output via hio on the x11 connection. so let's not care about it. */
+	return 0; /*  don't invoke the read method */
+}
+
+int shw_on_read (hio_dev_shw_t* dev, const void* data, hio_iolen_t len)
+{
+	return 0;
+}
+
+int shw_on_write (hio_dev_shw_t* dev, hio_iolen_t wrlen, void*  wrctx)
+{
+	return 0;
+}
+
+void shw_on_close (hio_dev_shw_t* dev)
+{
+	printf (">> shw closed....\n");
+}
+
+int main()
+{
+	hio_t* hio = HIO_NULL;
+	struct X11 x11;
+	hio_dev_pty_t* pty;
+	hio_dev_shw_t* shw;
+
+	hio = hio_open(HIO_NULL, 0, HIO_NULL, HIO_FEATURE_ALL, 512, HIO_NULL);
+	if (!hio)
+	{
+		printf ("Cannot open hio\n");
+		return -1;
+	}
+
+	hio_setoption (hio, HIO_LOG_TARGET_BCSTR, "/dev/stderr");
+
+	if (x11_setup(&x11) <= -1)  return -1;
+	
+	{
+		hio_dev_pty_make_t pi;
+		struct pair_t* pair;
+
+		memset (&pi, 0, HIO_SIZEOF(pi));
+		pi.cmd = "/bin/ksh";
+		pi.flags = 0;
+		pi.on_write = pty_on_write;
+		pi.on_read = pty_on_read;
+		pi.on_close = pty_on_close;
+		pty = hio_dev_pty_make(hio, HIO_SIZEOF(*pair), &pi);
+
+		pair = hio_dev_pty_getxtn(pty);
+		pair->x11 = &x11;
+		pair->pty = hio_dev_pty_getsyshnd(pty);
+
+		/*
+		if (!term_set_size(&pty, &x11))
+		   return 1;
+		*/
+	}
+
+	{
+		hio_dev_shw_make_t si;
+		struct pair_t* pair;
+
+		memset (&si, 0, HIO_SIZEOF(si));
+		si.hnd = ConnectionNumber(x11.dpy);
+		si.flags = HIO_DEV_SHW_KEEP_OPEN_ON_CLOSE | HIO_DEV_SHW_DISABLE_OUT | HIO_DEV_SHW_DISABLE_STREAM;
+		si.on_ready = shw_on_ready;
+		si.on_write = shw_on_write;
+		si.on_read = shw_on_read;
+		si.on_close = shw_on_close;
+		shw = hio_dev_shw_make(hio, HIO_SIZEOF(*pair), &si);
+
+		pair = hio_dev_shw_getxtn(shw);
+		pair->x11 = &x11;
+		pair->pty = hio_dev_pty_getsyshnd(pty);
+	}
+
+	hio_loop (hio);
+
+	if (hio) hio_close (hio);
+
+	x11_cleanup (&x11);
+	return 0;
+}