From 855ccd6c97cc29efd494abe56608f44a7974d3fe Mon Sep 17 00:00:00 2001
From: Natanael Copa <natanael.copa@gmail.com>
Date: Fri, 10 Sep 2010 10:30:53 +0200
Subject: send clients

---
 Makefile       |  21 +++++++++---
 lsircbot.c     | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 sircbot-send.c |  40 ++++++++++++++++++++++
 3 files changed, 160 insertions(+), 5 deletions(-)
 create mode 100644 lsircbot.c
 create mode 100644 sircbot-send.c

diff --git a/Makefile b/Makefile
index 62c42db..e0956f8 100644
--- a/Makefile
+++ b/Makefile
@@ -4,15 +4,26 @@ GIT_VERSION := $(shell [ -d .git ] && echo "-$$(git describe --always)")
 CFLAGS ?= -g
 CFLAGS += -DVERSION=\"$(VERSION)$(GIT_VERSION)\"
 
-all: sircbot
+TARGETS = sircbot sircbot-send
 
-sircbot_OBJ = sircbot.o irc.o
+ifneq (NOLUA,)
+TARGETS += sircbot.so
+LUA_LIBS=-llua
+endif
 
-sircbot: $(sircbot_OBJ)
+all: $(TARGETS)
+
+sircbot: sircbot.o irc.o
+	$(CC) $(LDFLAGS) -o $@ $^
+
+sircbot-send: sircbot-send.o
 	$(CC) $(LDFLAGS) -o $@ $^
 
+sircbot.so: lsircbot.o
+	$(CC) -shared $(LDFLAGS) -o $@ $^ $(LUA_LIBS)
+
 .c.o:
-	$(CC) $(CFLAGS) -c $^
+	$(CC) -fPIC $(CFLAGS) -c $^
 
 clean:
-	rm -rf sircbot $(sircbot_OBJ)
+	rm -f *.o $(TARGETS)
diff --git a/lsircbot.c b/lsircbot.c
new file mode 100644
index 0000000..c283f0e
--- /dev/null
+++ b/lsircbot.c
@@ -0,0 +1,104 @@
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+
+#define SBCONN_META "sircbot-connection"
+#ifndef VERSION
+#define VERSION "unknown"
+#endif
+
+static int *Lsbconn_checkarg(lua_State *L, int index)
+{
+	int *fdp;
+	luaL_checktype(L, index, LUA_TUSERDATA);
+	fdp = (int *) luaL_checkudata(L, index, SBCONN_META);
+	if (fdp == NULL)
+		luaL_typerror(L, index, SBCONN_META);
+	return fdp;
+}
+
+static int Lsbconn_new(lua_State *L)
+{
+	int *fdp;
+	const char *channel_name = luaL_checklstring(L, 1, NULL);
+	struct sockaddr_un sun;
+	fdp = (int *) lua_newuserdata(L, sizeof(int *));
+	luaL_getmetatable(L, SBCONN_META);
+	lua_setmetatable(L, -2);
+
+	*fdp = socket(PF_UNIX, SOCK_STREAM, 0);
+	if (*fdp < 0)
+		luaL_error(L, "Failed to create socket for '%s'", channel_name);
+
+	sun.sun_family = AF_UNIX;
+	snprintf(sun.sun_path, sizeof(sun.sun_path), "/var/run/sircbot/%s",
+		channel_name);
+	if (connect(*fdp, (struct sockaddr *) &sun, sizeof(sun)) < 0)
+		luaL_error(L, "%s", sun.sun_path);
+
+	return 1;
+}
+
+static int Lsbconn_destroy(lua_State *L)
+{
+	int *fdp = Lsbconn_checkarg(L, 1);
+	close(*fdp);
+	return 1;
+}
+
+static int Lsbconn_send(lua_State *L)
+{
+	int *fdp;
+	const char *msg;
+	int r;
+
+	fdp = Lsbconn_checkarg(L, 1);
+	msg = luaL_checklstring(L, 2, NULL);
+	r = write(*fdp, msg, strlen(msg));
+	lua_pushinteger(L, r);
+	return 1;
+}
+
+static const luaL_reg sbconn_meta_methods[] = {
+	{ "__gc",	Lsbconn_destroy },
+	{ NULL,		NULL }
+};
+
+static const luaL_reg sircbot_methods[] = {
+	{ "connect",	Lsbconn_new },
+	{ "send",	Lsbconn_send },
+	{ NULL,		NULL }
+};
+
+LUALIB_API int luaopen_sircbot(lua_State *L)
+{
+	/* register sircbot library */
+	luaL_register(L, "sircbot", sircbot_methods);
+
+	/* version */
+	lua_pushliteral(L, "version");
+	lua_pushliteral(L, VERSION);
+	lua_settable(L, -3);
+
+	/* register metatable for it */
+	luaL_newmetatable(L, SBCONN_META);
+	luaL_register(L, NULL, sbconn_meta_methods);
+	lua_pushliteral(L, "__index");
+	lua_pushvalue(L, -3);
+	lua_rawset(L, -3);
+	lua_pushliteral(L, "__metatable");
+	lua_pushvalue(L, -3);
+	lua_rawset(L, -3);
+	lua_pop(L, 1);
+
+	return 1;
+}
+
diff --git a/sircbot-send.c b/sircbot-send.c
new file mode 100644
index 0000000..6f109d3
--- /dev/null
+++ b/sircbot-send.c
@@ -0,0 +1,40 @@
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int connect_channel(const char *channel_name)
+{
+	struct sockaddr_un sun;
+	int fd = socket(PF_UNIX, SOCK_STREAM, 0);
+	if (fd < 0)
+		return fd;
+
+	sun.sun_family = AF_UNIX;
+	snprintf(sun.sun_path, sizeof(sun.sun_path), "/var/run/sircbot/%s",
+		channel_name);
+	if (connect(fd, (struct sockaddr *) &sun, sizeof(sun)) == 0)
+		return fd;
+	perror(sun.sun_path);
+	close(fd);
+	return -1;
+}
+
+int main(int argc, char *argv[])
+{
+	int i;
+	int fd = connect_channel(argv[1]);
+	char buf[2048];
+
+	if (fd < 0)
+		return 1;
+
+	while (fgets(buf, sizeof(buf), stdin))
+		if (write(fd, buf, strlen(buf)) < 0)
+			err(1, "write");
+	return 0;
+}
+
-- 
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