158 lines
3.2 KiB
C
158 lines
3.2 KiB
C
#include<stdlib.h>
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#include<stdio.h>
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#include<string.h>
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#include<unistd.h>
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#include<signal.h>
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#include<X11/Xlib.h>
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#define LENGTH(X) (sizeof(X) / sizeof (X[0]))
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#define CMDLENGTH 50
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typedef struct {
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char* icon;
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char* command;
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unsigned int interval;
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unsigned int signal;
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} Block;
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void sighandler(int num);
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void replace(char *str, char old, char new);
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void getcmds(int time);
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#ifndef __OpenBSD__
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void getsigcmds(int signal);
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void setupsignals();
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void sighandler(int signum);
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#endif
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int getstatus(char *str, char *last);
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void setroot();
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void statusloop();
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void termhandler(int signum);
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#include "blocks.h"
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static Display *dpy;
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static int screen;
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static Window root;
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static char statusbar[LENGTH(blocks)][CMDLENGTH] = {0};
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static char statusstr[2][256];
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static int statusContinue = 1;
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static void (*writestatus) () = setroot;
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void replace(char *str, char old, char new) {
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int N = strlen(str);
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for(int i = 0; i < N; i++)
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if(str[i] == old)
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str[i] = new;
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}
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/* opens process *cmd and stores output in *output */
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void getcmd(const Block *block, char *output) {
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strcpy(output, block->icon);
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char *cmd = block->command;
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FILE *cmdf = popen(cmd,"r");
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if (!cmdf)
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return;
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char c;
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int i = strlen(block->icon);
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fgets(output+i, CMDLENGTH-i, cmdf);
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i = strlen(output);
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if (delim != '\0' && --i)
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output[i++] = delim;
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output[i++] = '\0';
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pclose(cmdf);
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}
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void getcmds(int time) {
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const Block* current;
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for(int i = 0; i < LENGTH(blocks); i++) {
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current = blocks + i;
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if ((current->interval != 0 && time % current->interval == 0) || time == -1)
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getcmd(current,statusbar[i]);
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}
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}
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#ifndef __OpenBSD__
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void getsigcmds(int signal) {
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const Block *current;
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for (int i = 0; i < LENGTH(blocks); i++) {
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current = blocks + i;
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if (current->signal == signal)
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getcmd(current,statusbar[i]);
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}
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}
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void setupsignals() {
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for(int i = 0; i < LENGTH(blocks); i++) {
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if (blocks[i].signal > 0)
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signal(SIGRTMIN+blocks[i].signal, sighandler);
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}
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}
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#endif
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int getstatus(char *str, char *last) {
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strcpy(last, str);
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str[0] = '\0';
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for(int i = 0; i < LENGTH(blocks); i++)
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strcat(str, statusbar[i]);
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str[strlen(str)-1] = '\0';
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return strcmp(str, last); /* 0 if they are the same */
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}
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void setroot() {
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if (!getstatus(statusstr[0], statusstr[1])) /* Only set root if text has changed. */
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return;
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Display *d = XOpenDisplay(NULL);
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if (d) {
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dpy = d;
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}
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screen = DefaultScreen(dpy);
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root = RootWindow(dpy, screen);
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XStoreName(dpy, root, statusstr[0]);
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XCloseDisplay(dpy);
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}
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void pstdout() {
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if (!getstatus(statusstr[0], statusstr[1])) /* Only write out if text has changed. */
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return;
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printf("%s\n",statusstr[0]);
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fflush(stdout);
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}
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void statusloop() {
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#ifndef __OpenBSD__
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setupsignals();
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#endif
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int i = 0;
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getcmds(-1);
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while(statusContinue) {
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getcmds(i);
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writestatus();
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sleep(1.0);
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i++;
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}
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}
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#ifndef __OpenBSD__
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void sighandler(int signum) {
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getsigcmds(signum-SIGRTMIN);
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writestatus();
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}
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#endif
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void termhandler(int signum) {
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statusContinue = 0;
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exit(0);
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}
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int main(int argc, char** argv) {
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for(int i = 0; i < argc; i++) {
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if (!strcmp("-d",argv[i]))
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delim = argv[++i][0];
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else if(!strcmp("-p",argv[i]))
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writestatus = pstdout;
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}
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signal(SIGTERM, termhandler);
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signal(SIGINT, termhandler);
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statusloop();
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}
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