dwmblocks/dwmblocks.c

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C
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#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]))
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typedef struct {
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char* icon;
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char* command;
unsigned int interval;
unsigned int signal;
} Block;
void sighandler(int num);
void replace(char *str, char old, char new);
void getcmds(int time);
void getsigcmds(int signal);
void setupsignals();
void getstatus(char *str);
void setroot();
void statusloop();
void statusinit();
void sighandler(int signum);
void termhandler(int signum);
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#include "blocks.h"
static Display *dpy;
static int screen;
static Window root;
static char statusbar[LENGTH(blocks)][50] = {0};
static char statusstr[256];
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static char *statuscat;
static const char *volupcmd[] = { "volup", NULL };
static const char *voldowncmd[] = { "voldown", NULL };
static const char *volmutecmd[] = { "volmute", NULL };
static int statusContinue = 1,volmuted = 0;
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;
}
//opens process *cmd and stores output in *output
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void getcmd(const Block *block, char *output)
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{
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strcpy(output, block->icon);
char *cmd = block->command;
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FILE *cmdf = popen(cmd,"r");
if (!cmdf)
return;
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//int N = strlen(output);
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char c;
int sl;
int i = sl = strlen(block->icon);
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while((c = fgetc(cmdf)) != EOF)
output[i++] = c;
pclose(cmdf);
if (i == sl) { //return empty string if command has no output
output[0] = '\0';
return;
}
if (delim[0] != '\0' && --i)
for (int j = 0; delim[j]; j++)
output[i++] = delim[j];
else
output[--i] = '\0';
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}
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)
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getcmd(current,statusbar[i]);
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}
}
void getsigcmds(int signal)
{
const Block *current;
for (int i = 0; i < LENGTH(blocks); i++)
{
current = blocks + i;
if (current->signal == signal)
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getcmd(current,statusbar[i]);
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}
}
void setupsignals()
{
for(int i = 0; i < LENGTH(blocks); i++)
{
if (blocks[i].signal > 0)
signal(SIGRTMIN+blocks[i].signal, sighandler);
}
}
void getstatus(char *str)
{
int j = 0;
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for(int i = 0; i < LENGTH(blocks); j+=strlen(statusbar[i++]))
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{
strcpy(str + j, statusbar[i]);
}
for (int i = 0; delim[i]; i++)
str[--j] = '\0';
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}
void setroot()
{
Display *d = XOpenDisplay(NULL);
if (d) {
dpy = d;
}
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
getstatus(statusstr);
XStoreName(dpy, root, statusstr);
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XCloseDisplay(dpy);
}
void statusloop()
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{
setupsignals();
int i = 0;
getcmds(-1);
while(statusContinue)
{
getcmds(i);
setroot();
sleep(1.0);
i++;
}
}
void statusinit()
{
statusloop();
}
void sighandler(int signum)
{
getsigcmds(signum-SIGRTMIN);
setroot();
}
void termhandler(int signum)
{
statusContinue = 0;
exit(0);
}
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int main(int argc, char** argv)
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{
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for(int i = 0; i < argc; i++)
{
if (!strcmp("-d",argv[i]))
delim = argv[++i];
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}
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signal(SIGTERM, termhandler);
signal(SIGINT, termhandler);
statusinit();
}