Only open X server once rather than open and close after every writeout.

dwmblocks.c

@@ -39,6 +39,10 @@ void pstdout();
 #ifndef NO_X
 void setroot();
 static void (*writestatus) () = setroot;
+static int setupX();
+static Display *dpy;
+static int screen;
+static Window root;
 #else
 static void (*writestatus) () = pstdout;
 #endif
@@ -76,8 +80,7 @@ void getcmd(const Block *block, char *output)
 void getcmds(int time)
 {
 	const Block* current;
-	for (unsigned int i = 0; i < LENGTH(blocks); i++)
-	{
+	for (unsigned int i = 0; i < LENGTH(blocks); i++) {
 		current = blocks + i;
 		if ((current->interval != 0 && time % current->interval == 0) || time == -1)
 			getcmd(current,statusbar[i]);
@@ -87,8 +90,7 @@ void getcmds(int time)
 void getsigcmds(unsigned int signal)
 {
 	const Block *current;
-	for (unsigned int i = 0; i < LENGTH(blocks); i++)
-	{
+	for (unsigned int i = 0; i < LENGTH(blocks); i++) {
 		current = blocks + i;
 		if (current->signal == signal)
 			getcmd(current,statusbar[i]);
@@ -103,8 +105,7 @@ void setupsignals()
         signal(i, dummysighandler);
 #endif
 
-	for (unsigned int i = 0; i < LENGTH(blocks); i++)
-	{
+	for (unsigned int i = 0; i < LENGTH(blocks); i++) {
 		if (blocks[i].signal > 0)
 			signal(SIGMINUS+blocks[i].signal, sighandler);
 	}
@@ -124,22 +125,22 @@ int getstatus(char *str, char *last)
 #ifndef NO_X
 void setroot()
 {
-	static Display *dpy;
-	static int screen;
-	static Window root;
 	if (!getstatus(statusstr[0], statusstr[1]))//Only set root if text has changed.
 		return;
+	XStoreName(dpy, root, statusstr[0]);
+	XFlush(dpy);
+}
+
+int setupX()
+{
 	dpy = XOpenDisplay(NULL);
 	if (!dpy) {
-		fprintf(stderr, "Failed to open display\n");
-		statusContinue = 0;
-		returnStatus = 1;
-		return;
+		fprintf(stderr, "dwmblocks: Failed to open display\n");
+		return 0;
 	}
 	screen = DefaultScreen(dpy);
 	root = RootWindow(dpy, screen);
-	XStoreName(dpy, root, statusstr[0]);
-	XCloseDisplay(dpy);
+	return 1;
 }
 #endif
 
@@ -157,8 +158,7 @@ void statusloop()
 	setupsignals();
 	int i = 0;
 	getcmds(-1);
-	while (1)
-	{
+	while (1) {
 		getcmds(i++);
 		writestatus();
 		if (!statusContinue)
@@ -188,17 +188,23 @@ void termhandler()
 
 int main(int argc, char** argv)
 {
-	for (int i = 0; i < argc; i++) //Handle command line arguments
-	{
+	for (int i = 0; i < argc; i++) {//Handle command line arguments
 		if (!strcmp("-d",argv[i]))
 			strncpy(delim, argv[++i], delimLen);
 		else if (!strcmp("-p",argv[i]))
 			writestatus = pstdout;
 	}
+#ifndef NO_X
+	if (!setupX())
+		return 1;
+#endif
 	delimLen = MIN(delimLen, strlen(delim));
 	delim[delimLen++] = '\0';
 	signal(SIGTERM, termhandler);
 	signal(SIGINT, termhandler);
 	statusloop();
-	return returnStatus;
+#ifndef NO_X
+	XCloseDisplay(dpy);
+#endif
+	return 0;
 }