if stdin writer stops working, dwm consumed much IO load because it still tried to...

diff --git a/main.c b/main.c
index 42c9d8a..b59ff96 100644 (file)
--- a/main.c
+++ b/main.c
@@ -190,6 +190,7 @@ main(int argc, char *argv[])
        fd_set rd;
        XSetWindowAttributes wa;
        unsigned int mask;
        fd_set rd;
        XSetWindowAttributes wa;
        unsigned int mask;

+       Bool readstdin = True;

        Window w;
        XEvent ev;
 
        Window w;
        XEvent ev;
 


@@ -283,7 +284,8 @@ main(int argc, char *argv[])
 Mainloop:
        while(running) {
                FD_ZERO(&rd);
 Mainloop:
        while(running) {
                FD_ZERO(&rd);

-               FD_SET(STDIN_FILENO, &rd);
+               if(readstdin)
+                       FD_SET(STDIN_FILENO, &rd);

                FD_SET(ConnectionNumber(dpy), &rd);
 
                i = select(ConnectionNumber(dpy) + 1, &rd, 0, 0, 0);
                FD_SET(ConnectionNumber(dpy), &rd);
 
                i = select(ConnectionNumber(dpy) + 1, &rd, 0, 0, 0);


@@ -299,11 +301,13 @@ Mainloop:
                                                (handler[ev.type])(&ev); /* call handler */
                                }
                        }
                                                (handler[ev.type])(&ev); /* call handler */
                                }
                        }

-                       if(FD_ISSET(STDIN_FILENO, &rd)) {
+                       if(readstdin && FD_ISSET(STDIN_FILENO, &rd)) {

                                i = n = 0;
                                for(;;) {
                                        if((i = getchar()) == EOF) {
                                i = n = 0;
                                for(;;) {
                                        if((i = getchar()) == EOF) {

-                                               stext[0] = 0;
+                                               /* broken pipe/end of producer */
+                                               readstdin = False;
+                                               strcpy(stext, "broken pipe");

                                                goto Mainloop;
                                        }
                                        if(i == '\n' || n >= sizeof(stext) - 1)
                                                goto Mainloop;
                                        }
                                        if(i == '\n' || n >= sizeof(stext) - 1)