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Jakub
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dwmblocks.c.orig
213
dwmblocks.c.orig
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#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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#ifndef NO_X
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#include<X11/Xlib.h>
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#endif
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#ifdef __OpenBSD__
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#define SIGPLUS SIGUSR1+1
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#define SIGMINUS SIGUSR1-1
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#else
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#define SIGPLUS SIGRTMIN
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#define SIGMINUS SIGRTMIN
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#endif
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#define LENGTH(X) (sizeof(X) / sizeof (X[0]))
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#define CMDLENGTH 50
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#define MIN( a, b ) ( ( a < b) ? a : b )
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#define STATUSLENGTH (LENGTH(blocks) * CMDLENGTH + 1)
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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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#ifndef __OpenBSD__
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void dummysighandler(int num);
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#endif
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void sighandler(int num);
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void getcmds(int time);
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void getsigcmds(unsigned int signal);
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void setupsignals();
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void sighandler(int signum);
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int getstatus(char *str, char *last);
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void statusloop();
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void termhandler();
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void pstdout();
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#ifndef NO_X
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void setroot();
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static void (*writestatus) () = setroot;
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static int setupX();
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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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#else
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static void (*writestatus) () = pstdout;
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#endif
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#include "blocks.h"
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static char statusbar[LENGTH(blocks)][CMDLENGTH] = {0};
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static char statusstr[2][STATUSLENGTH];
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static int statusContinue = 1;
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static int returnStatus = 0;
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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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{
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strcpy(output, block->icon);
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FILE *cmdf = popen(block->command, "r");
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if (!cmdf)
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return;
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int i = strlen(block->icon);
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fgets(output+i, CMDLENGTH-i-delimLen, cmdf);
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i = strlen(output);
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if (i == 0) {
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//return if block and command output are both empty
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pclose(cmdf);
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return;
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}
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//only chop off newline if one is present at the end
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i = output[i-1] == '\n' ? i-1 : i;
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if (delim[0] != '\0') {
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strncpy(output+i, delim, delimLen);
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}
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else
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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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{
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const Block* current;
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for (unsigned 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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void getsigcmds(unsigned int signal)
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{
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const Block *current;
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for (unsigned 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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{
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#ifndef __OpenBSD__
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/* initialize all real time signals with dummy handler */
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for (int i = SIGRTMIN; i <= SIGRTMAX; i++)
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signal(i, dummysighandler);
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#endif
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for (unsigned int i = 0; i < LENGTH(blocks); i++) {
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if (blocks[i].signal > 0)
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signal(SIGMINUS+blocks[i].signal, sighandler);
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}
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}
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int getstatus(char *str, char *last)
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{
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strcpy(last, str);
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str[0] = '\0';
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for (unsigned int i = 0; i < LENGTH(blocks); i++)
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strcat(str, statusbar[i]);
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str[strlen(str)-strlen(delim)] = '\0';
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return strcmp(str, last);//0 if they are the same
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}
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#ifndef NO_X
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void setroot()
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{
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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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XStoreName(dpy, root, statusstr[0]);
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XFlush(dpy);
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}
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int setupX()
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{
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dpy = XOpenDisplay(NULL);
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if (!dpy) {
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fprintf(stderr, "dwmblocks: Failed to open display\n");
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return 0;
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}
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screen = DefaultScreen(dpy);
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root = RootWindow(dpy, screen);
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return 1;
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}
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#endif
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void pstdout()
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{
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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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{
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setupsignals();
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int i = 0;
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getcmds(-1);
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while (1) {
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getcmds(i++);
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writestatus();
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if (!statusContinue)
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break;
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sleep(1.0);
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}
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}
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#ifndef __OpenBSD__
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/* this signal handler should do nothing */
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void dummysighandler(int signum)
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{
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return;
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}
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#endif
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void sighandler(int signum)
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{
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getsigcmds(signum-SIGPLUS);
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writestatus();
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}
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void termhandler()
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{
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statusContinue = 0;
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}
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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++) {//Handle command line arguments
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if (!strcmp("-d",argv[i]))
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strncpy(delim, argv[++i], delimLen);
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else if (!strcmp("-p",argv[i]))
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writestatus = pstdout;
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}
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#ifndef NO_X
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if (!setupX())
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return 1;
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#endif
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delimLen = MIN(delimLen, strlen(delim));
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delim[delimLen++] = '\0';
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signal(SIGTERM, termhandler);
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signal(SIGINT, termhandler);
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statusloop();
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#ifndef NO_X
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XCloseDisplay(dpy);
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#endif
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return 0;
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}
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