Index: abbrev.c
--- abbrev.c.orig
+++ abbrev.c
@@ -16,11 +16,15 @@
 #endif
 #endif
 
+#include <curses.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <ctype.h>
 #include "sc.h"
 
+int	are_abbrevs();
+
 static	struct abbrev *abbr_base;
 
 void
@@ -43,10 +47,10 @@ add_abbr(char *string)
 	    struct abbrev *a;
 	    struct abbrev *nexta;
 
-	    (void) strcpy(px, "| ");
+	    (void) strlcpy(px, "| ", sizeof px);
 	    if (!(pager = getenv("PAGER")))
 		pager = DFLT_PAGER;
-	    (void) strcat(px, pager);
+	    (void) strlcat(px, pager, sizeof px);
 	    f = openfile(px, &pid, NULL);
 	    if (!f) {
 		error("Can't open pipe to %s", pager);
@@ -87,7 +91,7 @@ add_abbr(char *string)
 	    }
     }
     
-    if (expansion == NULL)
+    if (expansion == NULL) {
 	if ((a = find_abbr(string, strlen(string), &prev))) {
 	    error("abbrev \"%s %s\"", a->abbr, a->exp);
 	    return;
@@ -95,6 +99,7 @@ add_abbr(char *string)
 	    error("abreviation \"%s\" doesn't exist", string);
 	    return;
 	}
+    }
  
     if (find_abbr(string, strlen(string), &prev))
 	del_abbr(string);