shithub: jacksense

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check a few times before trusting the sense

--- a/jacksense.c

+++ b/jacksense.c

@@ -14,7 +14,7 @@

 {

 	int hp, sp, cmd, ctl, vol, lastvol, newvol;

 	int hpsafevol, spsafevol;

-	u32int x, y[4], has, had;

+	u32int x, y[4], has, had, c;

 	Biobuf *b;

 	char *s, *a[16], tmp[32];

@@ -61,10 +61,16 @@

 	had = -1;

 	lastvol = (spsafevol < hpsafevol ? spsafevol : hpsafevol)*2/3;

 	for(;;){

+		c = 0;

+again:

 		if(write(cmd, &x, 4) != 4 || read(cmd, y, sizeof(y)) < 4)

 			sysfatal("failed");

 		has = y[0] & (1<<31);

 		if(has != had){

+			if(c++ < 2){

+				sleep(75);

+				goto again;

+			}

 			newvol = lastvol;

 			if(pread(vol, tmp, sizeof(tmp)-1, 0) > 0 && strncmp(tmp, "master ", 7) == 0)

 				lastvol = atoi(tmp+7);