fixed undo within a global command (would corrupt the buffer)

changed move within a global to behave as in SunOS
added a couple error messages

1 files changed, 5 insertions, 1 deletions

diff --git a/bin/ed/buf.c b/bin/ed/buf.c
index 57c3361..1d74cb8 100644
--- a/bin/ed/buf.c
+++ b/bin/ed/buf.c
@@ -165,7 +165,11 @@ getaddr(lp)
 
 	while (cp != lp && (cp = cp->next) != &line0)
 		n++;
-	return (cp != &line0) ? n : 0;
+	if (n && cp == &line0) {
+		sprintf(errmsg, "invalid address");
+		return ERR;
+	 }
+	 return n;
 }