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cwfs: make sure we do a full dump after toggling noatime

--- a/sys/src/cmd/cwfs/all.h

+++ b/sys/src/cmd/cwfs/all.h

@@ -85,6 +85,7 @@

 int	noattach;		/* attach is disabled */

 int	noauth;			/* auth is disable */

 int	noatime;		/* atime is disabled */

+int	noatimeset;		/* noatime was changed (reset after dump) */

 int	wstatallow;		/* set to circumvent wstat permissions */

 int	writeallow;		/* set to circumvent write permissions */

 int	duallow;		/* single user to allow du */

--- a/sys/src/cmd/cwfs/con.c

+++ b/sys/src/cmd/cwfs/con.c

@@ -697,6 +697,7 @@

 cmd_noatime(int, char *[])

 {

 	noatime = !noatime;

+	noatimeset++;

 	print("atime %s\n", noatime ? "disabled" : "enabled");

 }

--- a/sys/src/cmd/cwfs/config.c

+++ b/sys/src/cmd/cwfs/config.c

@@ -21,9 +21,8 @@

 static int copyworm = 0, copydev = 0;

 static char *src, *dest;

-static int noauthset = 0;

-static int noatimeset = 0;

-static int readonlyset = 0;

+static int noauthset;

+static int readonlyset;

 static int resetparams;

 Fspar fspar[] = {

@@ -613,7 +612,6 @@

 		putbuf(p);

 		f.modconf = f.newconf = 0;

-		noauthset = noatimeset = readonlyset = 0;

 		goto start;

 	}

 	putbuf(p);

--- a/sys/src/cmd/cwfs/cw.c

+++ b/sys/src/cmd/cwfs/cw.c

@@ -1491,7 +1491,8 @@

 	if(chatty)

 		fprint(2, "cwroot %lld", (Wideoff)orba);

 	cons.noage = 1;

-	cw->all = cw->allflag | noatime;

+	cw->all = cw->allflag | noatime | noatimeset;

+	noatimeset = 0;

 	rba = cwrecur(cw, orba, Tsuper, 0, QPROOT);

 	if(rba == 0)

 		rba = orba;