From 311c19a661fb8e8cc85d131c1b87a6b80a89ef7c Mon Sep 17 00:00:00 2001
From: Denis Vlasenko
Date: Wed, 10 Dec 2008 11:51:45 +0000
Subject: ash: printf builtin with no arguments should not exit

---
 coreutils/printf.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/coreutils/printf.c b/coreutils/printf.c
index 76524f7..b0a48cd 100644
--- a/coreutils/printf.c
+++ b/coreutils/printf.c
@@ -359,8 +359,15 @@ int printf_main(int argc UNUSED_PARAM, char **argv)
 	 * We will mimic coreutils. */
 	if (argv[1] && argv[1][0] == '-' && argv[1][1] == '-' && !argv[1][2])
 		argv++;
-	if (!argv[1])
+	if (!argv[1]) {
+		if (ENABLE_ASH_BUILTIN_PRINTF
+		 && applet_name[0] != 'p'
+		) {
+			bb_error_msg("usage: printf FORMAT [ARGUMENT...]");
+			return 2; /* bash compat */
+		}
 		bb_show_usage();
+	}
 
 	format = argv[1];
 	argv2 = argv + 2;
-- 
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