Make sure prec is non-negative before calling getformat()

If jot is called without arguments, getformat() produces the illegal
"%.-1f" format string. __vfprintf() misinterprets the - as a left
adjust flag and uses a precision of 0. Set prec = 0 so that we use
"%.0f" in this situation.

ok martijn

diff --git a/usr.bin/jot/jot.c b/usr.bin/jot/jot.c
index 62eaf5d..fd686d4 100644 (file)
--- a/usr.bin/jot/jot.c
+++ b/usr.bin/jot/jot.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: jot.c,v 1.52 2021/08/13 07:56:34 martijn Exp $        */
+/*     $OpenBSD: jot.c,v 1.53 2021/08/13 10:40:23 tb Exp $     */
 /*     $NetBSD: jot.c,v 1.3 1994/12/02 20:29:43 pk Exp $       */
 
 /*-
@@ -160,10 +160,10 @@ main(int argc, char *argv[])
                        mask |= REPS;
                        if (reps == 0)
                                infinity = true;
-                       if (prec == -1)
-                               prec = 0;
                }
        case 0:
+               if (prec == -1)
+                       prec = 0;
                break;
        default:
                errx(1, "Too many arguments.  What do you mean by %s?",