Save and restore label and wdir on startup and exit.
I tend to hop on and off remote machines quite a bit.

Reference: /n/sources/patch/applied/conswdir-restore-dirs
Date: Thu Jun  8 13:53:32 CES 2006
Signed-off-by: steve@quintile.net

--- /sys/src/cmd/aux/conswdir.c	Thu Jun  8 13:49:19 2006
+++ /sys/src/cmd/aux/conswdir.c	Thu Jun  8 13:49:17 2006
@@ -11,6 +11,14 @@
 #include <u.h>
 #include <libc.h>
 
+struct {
+	char *file;
+	char name[512];
+} keep[] = {
+	{ "/dev/label" },
+	{ "/dev/wdir" }
+};
+
 char *prog = "/bin/rwd";
 
 void
@@ -21,6 +29,31 @@
 }
 
 void
+save(void)
+{
+	int i, fd;
+	for(i = 0; i < nelem(keep); i++){
+		*keep[i].name = 0;
+		if((fd = open(keep[i].file, OREAD)) != -1){
+			read(fd, keep[i].name, sizeof(keep[i].name));
+			close(fd);
+		}
+	}
+}
+
+void
+rest(void)
+{
+	int i, fd;
+	for(i = 0; i < nelem(keep); i++)
+		if((fd = open(keep[i].file, OWRITE)) != -1){
+			fprint(fd, "%s", keep[i].name);
+			close(fd);
+		}
+
+}
+
+void
 setpath(char *s)
 {
 	switch(rfork(RFPROC|RFFDG|RFNOWAIT)){
@@ -125,6 +158,7 @@
 	if(argc == 1)
 		prog = argv[0];
 
+	save();
 	n = 0;
 	for(;;){
 		m = read(0, buf+n, sizeof buf-n);
@@ -132,7 +166,7 @@
 			rerrstr(buf, sizeof buf);
 			if(strstr(buf, "interrupt"))
 				continue;
-			exits(nil);
+			break;
 		}
 		n += m;
 		m = process(buf, n, &n);
@@ -142,4 +176,6 @@
 			n -= m;
 		}
 	}
+	rest();
+	exits(nil);
 }