diff --git a/sys/src/cmd/cwfs/9p2.c b/sys/src/cmd/cwfs/9p2.c
index d5f484987..0e9cc57c4 100644
--- a/sys/src/cmd/cwfs/9p2.c
+++ b/sys/src/cmd/cwfs/9p2.c
@@ -93,7 +93,9 @@ mkdir9p2(Dir* dir, Dentry* dentry, void* strs)
 
 	op = p = strs;
 	dir->name = p;
-	p += sprint(p, "%s", dentry->name)+1;
+	strncpy(p, dentry->name, NAMELEN);
+	p[NAMELEN-1] = 0;
+	p += strlen(p)+1;
 
 	dir->uid = p;
 	uidtostr(p, dentry->uid, 1);
@@ -346,7 +348,7 @@ attach(Chan* chan, Fcall* f, Fcall* r)
 
 	r->qid = file->qid;
 
-	strncpy(chan->whoname, f->uname, sizeof(chan->whoname));
+	snprint(chan->whoname, sizeof(chan->whoname), "%s", f->uname);
 	chan->whotime = time(nil);
 out:
 	if(p != nil)
@@ -911,7 +913,7 @@ fs_create(Chan* chan, Fcall* f, Fcall* r)
 		goto phase;
 	}
 
-	strncpy(d1->name, f->name, sizeof(d1->name));
+	strncpy(d1->name, f->name, NAMELEN);
 	if(chan == cons.chan){
 		d1->uid = cons.uid;
 		d1->gid = cons.gid;
@@ -1012,7 +1014,6 @@ fs_read(Chan* chan, Fcall* f, Fcall* r, uchar* data)
 	}
 	iounit = chan->msize-IOHDRSZ;
 	if(count < 0 || count > iounit){
-fprint(2, "fs_read %d %d\n", count, iounit);
 		error = Ecount;
 		goto out;
 	}
@@ -1784,7 +1785,7 @@ fs_wstat(Chan* chan, Fcall* f, Fcall*, char* strs)
 		}
 		d->size = dir.length;
 		if(dir.name != d->name)
-			strncpy(d->name, dir.name, sizeof(d->name));
+			strncpy(d->name, dir.name, NAMELEN);
 		d->uid = uid;
 		d->gid = gid;
 		d->muid = muid;
diff --git a/sys/src/cmd/cwfs/con.c b/sys/src/cmd/cwfs/con.c
index ea1154b58..9e1e7bc05 100644
--- a/sys/src/cmd/cwfs/con.c
+++ b/sys/src/cmd/cwfs/con.c
@@ -14,7 +14,7 @@ consserve(void)
 {
 	int i;
 
-	strncpy(cons.chan->whochan, "console", sizeof(cons.chan->whochan));
+	snprint(cons.chan->whochan, sizeof(cons.chan->whochan), "console");
 	installcmds();
 	con_session();
 	cmd_exec("cfs");
@@ -312,8 +312,7 @@ cmd_who(int argc, char *argv[])
 				continue;
 			}
 		}
-		print("%3d: %10s %24s", cp->chan,
-			cp->whoname? cp->whoname: "<nowhoname>", cp->whochan);
+		print("%3d: %10s %24s", cp->chan, cp->whoname, cp->whochan);
 		if(cp->whoprint)
 			cp->whoprint(cp);
 		print("\n");
diff --git a/sys/src/cmd/cwfs/sub.c b/sys/src/cmd/cwfs/sub.c
index 0c19949a0..f7f13f2f9 100644
--- a/sys/src/cmd/cwfs/sub.c
+++ b/sys/src/cmd/cwfs/sub.c
@@ -46,7 +46,7 @@ fs_chaninit(int count, int data)
 		chans = cp;
 		cp->chan = cons.chano;
 		cons.chano++;
-		strncpy(cp->whoname, "<none>", sizeof cp->whoname);
+		snprint(cp->whoname, sizeof(cp->whoname), "<none>");
 		wlock(&cp->reflock);
 		wunlock(&cp->reflock);
 		rlock(&cp->reflock);