i3-config-wizard: use IPC functions from libi3

i3-config-wizard/Makefile

@@ -8,6 +8,8 @@ AUTOGENERATED:=cfgparse.tab.c cfgparse.yy.c
 FILES:=$(patsubst %.c,%.o,$(filter-out $(AUTOGENERATED),$(wildcard *.c)))
 HEADERS:=$(wildcard *.h)
 
+CPPFLAGS += -I$(TOPDIR)/include
+
 # Depend on the specific file (.c for each .o) and on all headers
 %.o: %.c ${HEADERS}
 	echo "[i3-config-wizard] CC $<"
@@ -15,9 +17,12 @@ HEADERS:=$(wildcard *.h)
 
 all: i3-config-wizard
 
-i3-config-wizard: cfgparse.y.o cfgparse.yy.o ${FILES}
+i3-config-wizard: $(TOPDIR)/libi3/libi3.a cfgparse.y.o cfgparse.yy.o ${FILES}
 	echo "[i3-config-wizard] LINK i3-config-wizard"
-	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)
+	$(CC) $(LDFLAGS) -o $@ $(filter-out libi3/libi3.a,$^) $(LIBS)
+
+$(TOPDIR)/libi3/%.a: $(TOPDIR)/libi3/*.c
+	$(MAKE) -C $(TOPDIR)/libi3
 
 cfgparse.yy.o: cfgparse.l cfgparse.y.o ${HEADERS}
 	echo "[i3-config-wizard] LEX $<"

i3-config-wizard/ipc.c

@@ -16,37 +16,6 @@
 #include <unistd.h>
 #include <err.h>
 
-/*
- * Formats a message (payload) of the given size and type and sends it to i3 via
- * the given socket file descriptor.
- *
- */
-void ipc_send_message(int sockfd, uint32_t message_size,
-                      uint32_t message_type, uint8_t *payload) {
-        int buffer_size = strlen("i3-ipc") + sizeof(uint32_t) + sizeof(uint32_t) + message_size;
-        char msg[buffer_size];
-        char *walk = msg;
-
-        strcpy(walk, "i3-ipc");
-        walk += strlen("i3-ipc");
-        memcpy(walk, &message_size, sizeof(uint32_t));
-        walk += sizeof(uint32_t);
-        memcpy(walk, &message_type, sizeof(uint32_t));
-        walk += sizeof(uint32_t);
-        memcpy(walk, payload, message_size);
-
-        int sent_bytes = 0;
-        int bytes_to_go = buffer_size;
-        while (sent_bytes < bytes_to_go) {
-                int n = write(sockfd, msg + sent_bytes, bytes_to_go);
-                if (n == -1)
-                        err(EXIT_FAILURE, "write() failed");
-
-                sent_bytes += n;
-                bytes_to_go -= n;
-        }
-}
-
 /*
  * Connects to the i3 IPC socket and returns the file descriptor for the
  * socket. die()s if anything goes wrong.

i3-config-wizard/ipc.h

@@ -1,9 +1,6 @@
 #ifndef _IPC_H
 #define _IPC_H
 
-void ipc_send_message(int sockfd, uint32_t message_size,
-                      uint32_t message_type, uint8_t *payload);
-
 int connect_ipc(char *socket_path);
 
 #endif

i3-config-wizard/main.c

@@ -52,6 +52,7 @@ while (0)
 
 #include "xcb.h"
 #include "ipc.h"
+#include "libi3.h"
 
 enum { STEP_WELCOME, STEP_GENERATE } current_step = STEP_WELCOME;
 enum { MOD_Mod1, MOD_Mod4 } modifier = MOD_Mod4;
@@ -130,42 +131,6 @@ static char *resolve_tilde(const char *path) {
     return result;
 }
 
-/*
- * Try to get the socket path from X11 and return NULL if it doesn’t work.
- * As i3-msg is a short-running tool, we don’t bother with cleaning up the
- * connection and leave it up to the operating system on exit.
- *
- */
-static char *socket_path_from_x11() {
-    xcb_connection_t *conn;
-    int screen;
-    if ((conn = xcb_connect(NULL, &screen)) == NULL ||
-        xcb_connection_has_error(conn))
-        return NULL;
-    xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screen);
-    xcb_window_t root = root_screen->root;
-
-    xcb_intern_atom_cookie_t atom_cookie;
-    xcb_intern_atom_reply_t *atom_reply;
-
-    atom_cookie = xcb_intern_atom(conn, 0, strlen("I3_SOCKET_PATH"), "I3_SOCKET_PATH");
-    atom_reply = xcb_intern_atom_reply(conn, atom_cookie, NULL);
-    if (atom_reply == NULL)
-        return NULL;
-
-    xcb_get_property_cookie_t prop_cookie;
-    xcb_get_property_reply_t *prop_reply;
-    prop_cookie = xcb_get_property_unchecked(conn, false, root, atom_reply->atom,
-                                             XCB_GET_PROPERTY_TYPE_ANY, 0, PATH_MAX);
-    prop_reply = xcb_get_property_reply(conn, prop_cookie, NULL);
-    if (prop_reply == NULL || xcb_get_property_value_length(prop_reply) == 0)
-        return NULL;
-    if (asprintf(&socket_path, "%.*s", xcb_get_property_value_length(prop_reply),
-                 (char*)xcb_get_property_value(prop_reply)) == -1)
-        return NULL;
-    return socket_path;
-}
-
 /*
  * Handles expose events, that is, draws the window contents.
  *