dwmblocks addedHEADmaster

1 files changed, 253 insertions, 0 deletions

diff --git a/dwmblocks.c b/dwmblocks.c
new file mode 100644
index 0000000..daee52b
--- /dev/null
+++ b/dwmblocks.c
@@ -0,0 +1,253 @@
+#include<stdlib.h>
+#include<stdio.h>
+#include<string.h>
+#include<unistd.h>
+#include<signal.h>
+#include<X11/Xlib.h>
+#define LENGTH(X)               (sizeof(X) / sizeof (X[0]))
+#define CMDLENGTH		120
+#define STATUSLENGTH (LENGTH(blocks) * CMDLENGTH + 1)
+
+typedef struct {
+	char* icon;
+	char* command;
+	unsigned int interval;
+	unsigned int signal;
+} Block;
+char** last_updates;
+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 setupsignals();
+void sighandler(int signum);
+#endif
+int getstatus(char *str, char *last);
+void setroot();
+void statusloop();
+void termhandler(int signum);
+
+
+#include "config.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;
+
+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++;
+	}
+}
+
+//opens process *cmd and stores output in *output
+void getcmd(const Block *block, char* last_update , char *output)
+{
+	if (block->signal)
+	{
+		output[0] = block->signal;
+		output++;
+	}
+	strcpy(output, block->icon);
+	char *cmd = block->command;
+	FILE *cmdf = popen(cmd,"r");
+	if (!cmdf)
+		return;
+	char c;
+	int i = strlen(block->icon);
+	fgets(output+i, CMDLENGTH-(strlen(delim)+1), cmdf);
+	remove_all(output, '\n');
+	if(i == strlen(output))
+		strcpy(output+i, last_update);
+	else
+		strcpy(last_update, output+i);
+
+	i = strlen(output);
+	if ((i > 0 && block != &blocks[LENGTH(blocks) - 1]))
+		strcat(output, delim);
+	i+=strlen(delim);
+	output[i++] = '\0';
+	pclose(cmdf);
+}
+
+void getcmds(int time)
+{
+	const Block* current;
+	for(int i = 0; i < LENGTH(blocks); i++)
+	{
+		current = blocks + i;
+		if ((current->interval != 0 && time % current->interval == 0) || time == -1)
+			getcmd(current,last_updates[i],statusbar[i]);
+	}
+}
+
+#ifndef __OpenBSD__
+void getsigcmds(int signal)
+{
+	const Block *current;
+	for (int i = 0; i < LENGTH(blocks); i++)
+	{
+		current = blocks + i;
+		if (current->signal == signal)
+			getcmd(current,last_updates[i],statusbar[i]);
+	}
+}
+
+void setupsignals()
+{
+	struct sigaction sa;
+	for(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);
+		}
+	}
+	sa.sa_sigaction = buttonhandler;
+	sa.sa_flags = SA_SIGINFO;
+	sigaction(SIGUSR1, &sa, NULL);
+	struct sigaction sigchld_action = {
+  		.sa_handler = SIG_DFL,
+  		.sa_flags = SA_NOCLDWAIT
+	};
+	sigaction(SIGCHLD, &sigchld_action, NULL);
+
+}
+#endif
+
+int getstatus(char *str, char *last)
+{
+	strcpy(last, str);
+	str[0] = '\0';
+    for(int i = 0; i < LENGTH(blocks); i++) {
+		strcat(str, statusbar[i]);
+        if (i == LENGTH(blocks) - 1)
+            strcat(str, " ");
+    }
+	str[strlen(str)-1] = '\0';
+	return strcmp(str, last);//0 if they are the same
+}
+
+void setroot()
+{
+	if (!getstatus(statusstr[0], statusstr[1]))//Only set root if text has changed.
+		return;
+	Display *d = XOpenDisplay(NULL);
+	if (d) {
+		dpy = d;
+	}
+	screen = DefaultScreen(dpy);
+	root = RootWindow(dpy, screen);
+	XStoreName(dpy, root, statusstr[0]);
+	XCloseDisplay(dpy);
+}
+
+void pstdout()
+{
+	if (!getstatus(statusstr[0], statusstr[1]))//Only write out if text has changed.
+		return;
+	printf("%s\n",statusstr[0]);
+	fflush(stdout);
+}
+
+
+void statusloop()
+{
+#ifndef __OpenBSD__
+	setupsignals();
+#endif
+  last_updates = malloc(sizeof(char*) * LENGTH(blocks));
+  for(int i = 0; i < LENGTH(blocks); i++) {
+    last_updates[i] = malloc(sizeof(char) * CMDLENGTH);
+    strcpy(last_updates[i],"");
+  }
+	int i = 0;
+	getcmds(-1);
+	while(statusContinue)
+	{
+		getcmds(i);
+		writestatus();
+		sleep(1.0);
+		i++;
+	}
+}
+
+#ifndef __OpenBSD__
+void sighandler(int signum)
+{
+	getsigcmds(signum-SIGRTMIN);
+	writestatus();
+}
+
+void buttonhandler(int sig, siginfo_t *si, void *ucontext)
+{
+	char button[2] = {'0' + si->si_value.sival_int & 0xff, '\0'};
+	pid_t process_id = getpid();
+	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 shcmd[1024];
+		sprintf(shcmd,"%s && kill -%d %d",current->command, current->signal+34,process_id);
+		char *command[] = { "/bin/sh", "-c", shcmd, NULL };
+		setenv("BLOCK_BUTTON", button, 1);
+		setsid();
+		execvp(command[0], command);
+		exit(EXIT_SUCCESS);
+	}
+}
+
+#endif
+
+void termhandler(int signum)
+{
+  for(int i = 0; i < LENGTH(blocks); i++) {
+    free(last_updates[i]);
+  }
+  free(last_updates);
+	statusContinue = 0;
+	exit(0);
+}
+
+int main(int argc, char** argv)
+{
+	for(int i = 0; i < argc; i++)
+	{
+		if (!strcmp("-d",argv[i]))
+			delim = argv[++i];
+		else if(!strcmp("-p",argv[i]))
+			writestatus = pstdout;
+	}
+	signal(SIGTERM, termhandler);
+	signal(SIGINT, termhandler);
+	statusloop();
+}