From: Aki Tuomi <aki.tuomi@open-xchange.com>
Date: Thu, 21 Feb 2019 16:50:10 +0000 (+0200)
Subject: lib-program-client: test-program-client-local - Use dd instead of head
X-Git-Tag: 2.3.18~250
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1b13ee113b1b616d2a1cb0361d228639aff4a5c9;p=thirdparty%2Fdovecot%2Fcore.git

lib-program-client: test-program-client-local - Use dd instead of head

`head -c n` is only guaranteed to print n bytes, but it may consume more.
FreeBSD's implementation of head(1) uses buffered stdio, which did just that.

`dd` consumes exactly the specified number of bytes.
---

diff --git a/src/lib-program-client/test-program-client-local.c b/src/lib-program-client/test-program-client-local.c
index 03e24015cd..2040b15581 100644
--- a/src/lib-program-client/test-program-client-local.c
+++ b/src/lib-program-client/test-program-client-local.c
@@ -178,12 +178,12 @@ static void test_program_io_big(void)
 	   and then finally reads the rest in one go. */
 	const char *const args[] = {
 		"-c",
-		"(head -c 10240; sleep 0.1; "
-		 "head -c 10240; sleep 0.1; "
-		 "head -c 10240; sleep 0.1; "
-		 "head -c 10240; sleep 0.1; "
-		 "head -c 10240; sleep 0.1; "
-		 "head -c 10240; sleep 0.1; cat)",
+		"(dd bs=10240 count=1; sleep 0.1; "
+		 "dd bs=10240 count=1; sleep 0.1; "
+		 "dd bs=10240 count=1; sleep 0.1; "
+		 "dd bs=10240 count=1; sleep 0.1; "
+		 "dd bs=10240 count=1; sleep 0.1; "
+		 "dd bs=10240 count=1; sleep 0.1; cat) 2>/dev/null",
 		NULL
 	};