changed to a non clickable version

Makefile

@@ -1,14 +1,36 @@
-PREFIX ?= /usr/local
+PREFIX  := /usr/local
+CC      := cc
+CFLAGS  := -pedantic -Wall -Wno-deprecated-declarations -Os
+LDFLAGS := -lX11
+
+# FreeBSD (uncomment)
+#LDFLAGS += -L/usr/local/lib -I/usr/local/include
+# # OpenBSD (uncomment)
+#LDFLAGS += -L/usr/X11R6/lib -I/usr/X11R6/include
+
+all: options dwmblocks
+
+options:
+	@echo dwmblocks build options:
+	@echo "CFLAGS  = ${CFLAGS}"
+	@echo "LDFLAGS = ${LDFLAGS}"
+	@echo "CC      = ${CC}"
+
+dwmblocks: dwmblocks.c blocks.def.h blocks.h
+	${CC} -o dwmblocks dwmblocks.c ${CFLAGS} ${LDFLAGS}
+
+blocks.h:
+	cp blocks.def.h $@
 
-output: dwmblocks.o
-	gcc dwmblocks.o -lX11 -o dwmblocks
-dwmblocks.o: dwmblocks.c config.h
-	gcc -c -lX11 dwmblocks.c
 clean:
 	rm -f *.o *.gch dwmblocks
-install: output
-	mkdir -p $(DESTDIR)$(PREFIX)/bin
-	cp -f dwmblocks $(DESTDIR)$(PREFIX)/bin
-	chmod 755 $(DESTDIR)$(PREFIX)/bin/dwmblocks
+
+install: dwmblocks
+	mkdir -p ${DESTDIR}${PREFIX}/bin
+	cp -f dwmblocks ${DESTDIR}${PREFIX}/bin
+	chmod 755 ${DESTDIR}${PREFIX}/bin/dwmblocks
+
 uninstall:
-	rm -f $(DESTDIR)$(PREFIX)/bin/dwmblocks
+	rm -f ${DESTDIR}${PREFIX}/bin/dwmblocks
+
+.PHONY: all options clean install uninstall

blocks.def.h

@@ -11,9 +11,5 @@ static const Block blocks[] = {
 };
 
 //sets delimeter between status commands. NULL character ('\0') means no delimeter.
-static char delim = '|';
-
-// Have dwmblocks automatically recompile and run when you edit this file in
-// vim with the following line in your vimrc/init.vim:
-
-// autocmd BufWritePost ~/.local/src/dwmblocks/config.h !cd ~/.local/src/dwmblocks/; sudo make install && { killall -q dwmblocks;setsid dwmblocks & }
+static char delim[] = "|";
+static unsigned int delimLen = 5;

blocks.h

@@ -0,0 +1,15 @@
+//Modify this file to change what commands output to your statusbar, and recompile using the make command.
+static const Block blocks[] = {
+	/*Icon*/	/*Command*/		/*Update Interval*/	/*Update Signal*/
+	{"",	"memory",	10,	6},
+	{"",	"cpu",		10,	5},
+	{"",	"disk /",	1800,	7},
+	{"",	"volume",	0,	4},
+	{"",	"battery BAT0",	5,	2},
+	{"",	"internet",	5,	3},
+	{"",	"clock",	60,	1},
+};
+
+//sets delimeter between status commands. NULL character ('\0') means no delimeter.
+static char delim[] = "|";
+static unsigned int delimLen = 5;

dwmblocks.c

@@ -3,9 +3,20 @@
 #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
+#else
+#define SIGPLUS			SIGRTMIN
+#define SIGMINUS		SIGRTMIN
+#endif
 #define LENGTH(X)               (sizeof(X) / sizeof (X[0]))
 #define CMDLENGTH		50
+#define MIN( a, b ) ( ( a < b) ? a : b )
+#define STATUSLENGTH (LENGTH(blocks) * CMDLENGTH + 1)
 
 typedef struct {
 	char* icon;
@@ -13,73 +24,58 @@ typedef struct {
 	unsigned int interval;
 	unsigned int signal;
 } Block;
-void sighandler(int num);
-void buttonhandler(int sig, siginfo_t *si, void *ucontext);
-void replace(char *str, char old, char new);
-void remove_all(char *str, char to_remove);
-void getcmds(int time);
 #ifndef __OpenBSD__
-void getsigcmds(int signal);
+void dummysighandler(int num);
+#endif
+void sighandler(int num);
+void getcmds(int time);
+void getsigcmds(unsigned int signal);
 void setupsignals();
 void sighandler(int signum);
-#endif
 int getstatus(char *str, char *last);
-void setroot();
 void statusloop();
-void termhandler(int signum);
-
-
-#include "config.h"
-
+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 char statusbar[LENGTH(blocks)][CMDLENGTH] = {0};
-static char statusstr[2][256];
+static char statusstr[2][STATUSLENGTH];
 static int statusContinue = 1;
-static void (*writestatus) () = setroot;
-
-void replace(char *str, char old, char new)
-{
-	int N = strlen(str);
-	for(int i = 0; i < N; i++)
-		if(str[i] == old)
-			str[i] = new;
-}
-
-void remove_all(char *str, char to_remove) {
-	char *read = str;
-	char *write = str;
-	while (*read) {
-		if (*read == to_remove) {
-			read++;
-			*write = *read;
-		}
-		read++;
-		write++;
-	}
-}
+static int returnStatus = 0;
 
 //opens process *cmd and stores output in *output
 void getcmd(const Block *block, char *output)
 {
-	if (block->signal)
-	{
-		output[0] = block->signal;
-		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, cmdf);
-	remove_all(output, '\n');
+	fgets(output+i, CMDLENGTH-i-delimLen, cmdf);
 	i = strlen(output);
-	if (delim != '\0' && i)
-		output[i++] = delim;
+	if (i == 0) {
+		//return if block and command output are both empty
+		pclose(cmdf);
+		return;
+	}
+	//only chop off newline if one is present at the end
+	i = output[i-1] == '\n' ? i-1 : i;
+	if (delim[0] != '\0') {
+		strncpy(output+i, delim, delimLen);
+	}
+	else
 		output[i++] = '\0';
 	pclose(cmdf);
 }
@@ -87,20 +83,17 @@ void getcmd(const Block *block, char *output)
 void getcmds(int time)
 {
 	const Block* current;
-	for(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]);
 	}
 }
 
-#ifndef __OpenBSD__
-void getsigcmds(int signal)
+void getsigcmds(unsigned int signal)
 {
 	const Block *current;
-	for (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]);
@@ -109,46 +102,50 @@ void getsigcmds(int signal)
 
 void setupsignals()
 {
-	struct sigaction sa;
-	for(int i = 0; i < LENGTH(blocks); i++)
-	{
+#ifndef __OpenBSD__
+	    /* initialize all real time signals with dummy handler */
+    for (int i = SIGRTMIN; i <= SIGRTMAX; i++)
+        signal(i, dummysighandler);
+#endif
+
+	for (unsigned int i = 0; i < LENGTH(blocks); i++) {
 		if (blocks[i].signal > 0)
-		{
-			signal(SIGRTMIN+blocks[i].signal, sighandler);
-			sigaddset(&sa.sa_mask, SIGRTMIN+blocks[i].signal);
+			signal(SIGMINUS+blocks[i].signal, sighandler);
 	}
-	}
-	sa.sa_sigaction = buttonhandler;
-	sa.sa_flags = SA_SIGINFO;
-	sigaction(SIGUSR1, &sa, NULL);
-	signal(SIGCHLD, SIG_IGN);
 
 }
-#endif
 
 int getstatus(char *str, char *last)
 {
 	strcpy(last, str);
 	str[0] = '\0';
-	for(int i = 0; i < LENGTH(blocks); i++)
+	for (unsigned int i = 0; i < LENGTH(blocks); i++)
 		strcat(str, statusbar[i]);
-	str[strlen(str)-1] = '\0';
+	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()
 {
@@ -161,68 +158,56 @@ void pstdout()
 
 void statusloop()
 {
-#ifndef __OpenBSD__
 	setupsignals();
-#endif
 	int i = 0;
 	getcmds(-1);
-	while(statusContinue)
-	{
-		getcmds(i);
+	while (1) {
+		getcmds(i++);
 		writestatus();
+		if (!statusContinue)
+			break;
 		sleep(1.0);
-		i++;
 	}
 }
 
 #ifndef __OpenBSD__
-void sighandler(int signum)
+/* this signal handler should do nothing */
+void dummysighandler(int signum)
 {
-	getsigcmds(signum-SIGRTMIN);
-	writestatus();
+    return;
 }
-
-void buttonhandler(int sig, siginfo_t *si, void *ucontext)
-{
-	char button[2] = {'0' + si->si_value.sival_int & 0xff, '\0'};
-	sig = si->si_value.sival_int >> 8;
-	if (fork() == 0)
-	{
-		const Block *current;
-		for (int i = 0; i < LENGTH(blocks); i++)
-		{
-			current = blocks + i;
-			if (current->signal == sig)
-				break;
-		}
-		char *command[] = { "/bin/sh", "-c", current->command, NULL };
-		setenv("BLOCK_BUTTON", button, 1);
-		setsid();
-		execvp(command[0], command);
-		exit(EXIT_SUCCESS);
-	}
-	getsigcmds(sig);
-	writestatus();
-}
-
 #endif
 
-void termhandler(int signum)
+void sighandler(int signum)
+{
+	getsigcmds(signum-SIGPLUS);
+	writestatus();
+}
+
+void termhandler()
 {
 	statusContinue = 0;
-	exit(0);
 }
 
 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]))
-			delim = argv[++i][0];
-		else if(!strcmp("-p",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();
+#ifndef NO_X
+	XCloseDisplay(dpy);
+#endif
+	return 0;
 }