awk: don't segfault on printf(%*s). Close 1337.

diff --git a/editors/awk.c b/editors/awk.c
index bc9e99a..2e67f67 100644 (file)
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -1756,8 +1756,11 @@ static char *awk_printf(node *n)
                s = f;
                while (*f && (*f != '%' || *(++f) == '%'))
                        f++;
-               while (*f && !isalpha(*f))
+               while (*f && !isalpha(*f)) {
+                       if (*f == '*')
+                               syntax_error("%*x formats are not supported");
                        f++;
+               }
 
                incr = (f - s) + MAXVARFMT;
                qrealloc(&b, incr + i, &bsize);