X-Git-Url: https://git.danieliu.xyz/?p=dwmblocks.git;a=blobdiff_plain;f=dwmblocks.c;h=64ad7a33e2d6b6acf39f28b899e1a74a23be9cee;hp=e3ac0348c34b0512b3415a0713ff1d2fd36c87d6;hb=b6b0be4f4fe77fea6f1aef07232a44abd0139098;hpb=941f415b3821bf4f3493a0864c05a1af313b22bc

diff --git a/dwmblocks.c b/dwmblocks.c
index e3ac034..64ad7a3 100644
--- a/dwmblocks.c
+++ b/dwmblocks.c
@@ -3,7 +3,9 @@
 #include<string.h>
 #include<unistd.h>
 #include<signal.h>
+#ifndef NO_X
 #include<X11/Xlib.h>
+#endif
 #ifdef __OpenBSD__
 #define SIGPLUS			SIGUSR1+1
 #define SIGMINUS		SIGUSR1-1
@@ -31,35 +33,45 @@ void getsigcmds(unsigned int signal);
 void setupsignals();
 void sighandler(int signum);
 int getstatus(char *str, char *last);
-void setroot();
 void statusloop();
 void termhandler();
+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
 
 
 #include "blocks.h"
 
-static Display *dpy;
-static int screen;
-static Window root;
 static char statusbar[LENGTH(blocks)][CMDLENGTH] = {0};
 static char statusstr[2][STATUSLENGTH];
 static int statusContinue = 1;
-static void (*writestatus) () = setroot;
+static int returnStatus = 0;
 
 //opens process *cmd and stores output in *output
 void getcmd(const Block *block, char *output)
 {
 	strcpy(output, block->icon);
-	char *cmd = block->command;
-	FILE *cmdf = popen(cmd,"r");
+	FILE *cmdf = popen(block->command, "r");
 	if (!cmdf)
 		return;
-	char c;
 	int i = strlen(block->icon);
 	fgets(output+i, CMDLENGTH-i-delimLen, cmdf);
 	i = strlen(output);
-	if (delim[0] != '\0' && --i)
-		 strncpy(output+i, delim, delimLen); 
+	if (i == 0)//return if block and command output are both empty
+		return;
+	if (delim[0] != '\0') {
+		//only chop off newline if one is present at the end
+		i = output[i-1] == '\n' ? i-1 : i;
+		strncpy(output+i, delim, delimLen); 
+	}
 	else
 		output[i++] = '\0';
 	pclose(cmdf);
@@ -68,8 +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]);
@@ -79,8 +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]);
@@ -91,12 +101,11 @@ void setupsignals()
 {
 #ifndef __OpenBSD__
 	    /* initialize all real time signals with dummy handler */
-    for(int i = SIGRTMIN; i <= SIGRTMAX; i++)
+    for (int i = SIGRTMIN; i <= SIGRTMAX; i++)
         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);
 	}
@@ -107,25 +116,33 @@ int getstatus(char *str, char *last)
 {
 	strcpy(last, str);
 	str[0] = '\0';
-	for(unsigned int i = 0; i < LENGTH(blocks); i++)
+	for (unsigned int i = 0; i < LENGTH(blocks); i++)
 		strcat(str, statusbar[i]);
 	str[strlen(str)-strlen(delim)] = '\0';
 	return strcmp(str, last);//0 if they are the same
 }
 
+#ifndef NO_X
 void setroot()
 {
 	if (!getstatus(statusstr[0], statusstr[1]))//Only set root if text has changed.
 		return;
-	Display *d = XOpenDisplay(NULL);
-	if (d) {
-		dpy = d;
+	XStoreName(dpy, root, statusstr[0]);
+	XFlush(dpy);
+}
+
+int setupX()
+{
+	dpy = XOpenDisplay(NULL);
+	if (!dpy) {
+		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
 
 void pstdout()
 {
@@ -141,12 +158,12 @@ void statusloop()
 	setupsignals();
 	int i = 0;
 	getcmds(-1);
-	while(statusContinue)
-	{
-		getcmds(i);
+	while (1) {
+		getcmds(i++);
 		writestatus();
+		if (!statusContinue)
+			break;
 		sleep(1.0);
-		i++;
 	}
 }
 
@@ -171,15 +188,23 @@ void termhandler()
 
 int main(int argc, char** argv)
 {
-	for(int i = 0; i < argc; i++)
-	{
+	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]))
+		else if (!strcmp("-p",argv[i]))
 			writestatus = pstdout;
 	}
-	delim[MIN(delimLen, strlen(delim))] = '\0';
+#ifndef NO_X
+	if (!setupX())
+		return 1;
+#endif
+	delimLen = MIN(delimLen, strlen(delim));
+	delim[delimLen++] = '\0';
 	signal(SIGTERM, termhandler);
 	signal(SIGINT, termhandler);
 	statusloop();
+#ifndef NO_X
+	XCloseDisplay(dpy);
+#endif
+	return 0;
 }