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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]))
typedef struct {
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);
#include "blocks.h"
static Display *dpy;
static int screen;
static Window root;
static char statusbar[LENGTH(blocks)][50] = {0};
static char statusstr[256];
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
void getcmd(char *cmd, char *output)
{
FILE *cmdf = popen(cmd,"r");
if (!cmdf)
return;
int N = strlen(output);
char c;
int i = 0;
while((c = fgetc(cmdf)) != EOF)
output[i++] = c;
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->command,statusbar[i]);
}
}
void getsigcmds(int signal)
{
const Block *current;
for (int i = 0; i < LENGTH(blocks); i++)
{
current = blocks + i;
if (current->signal == signal)
getcmd(current->command,statusbar[i]);
}
}
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;
for(int i = 0; i < 5; j+=strlen(statusbar[i++]))
{
strcpy(str + j, statusbar[i]);
}
str[j] = '\0';
}
void setroot()
{
Display *d = XOpenDisplay(NULL);
if (d) {
dpy = d;
}
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
getstatus(statusstr);
replace(statusstr,'\n',' ');//gets rid of newlines from output
replace(statusstr,EOF,' ');//gets rid of EOF from output
XStoreName(dpy, root, statusstr);
XCloseDisplay(dpy);
}
void statusloop()
{
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);
}
int main()
{
signal(SIGTERM, termhandler);
signal(SIGINT, termhandler);
statusinit();
}
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