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From: randall.s.becker@rogers.com
To: git@vger.kernel.org
Cc: "Randall S. Becker" <rsbecker@nexbridge.com>
Subject: [Patch v1 1/3] test-lib-functions.sh: add generate_zero_bytes function
Date: Sat,  9 Feb 2019 13:59:28 -0500	[thread overview]
Message-ID: <20190209185930.5256-2-randall.s.becker@rogers.com> (raw)
In-Reply-To: <20190209185930.5256-1-randall.s.becker@rogers.com>

From: "Randall S. Becker" <rsbecker@nexbridge.com>

t5318 and t5562 used /dev/zero, which is not portable. This function
provides both a fixed block of NUL bytes and an infinite stream of NULs.

Signed-off-by: Randall S. Becker <rsbecker@nexbridge.com>
---
 t/test-lib-functions.sh | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 92cf8f812..bbf68712c 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -116,6 +116,19 @@ remove_cr () {
 	tr '\015' Q | sed -e 's/Q$//'
 }
 
+# Generate an output of $1 bytes of all zeroes (NULs, not ASCII zeroes).
+# If $1 is 'infinity', output forever or until the receiving pipe stops reading,
+# whichever comes first.
+generate_zero_bytes () {
+	perl -e 'if ($ARGV[0] == "infinity") {
+		while (-1) {
+			print "\0"
+		}
+	} else {
+		print "\0" x $ARGV[0]
+	}' "$@"
+}
+
 # In some bourne shell implementations, the "unset" builtin returns
 # nonzero status when a variable to be unset was not set in the first
 # place.
-- 
2.12.3


  reply	other threads:[~2019-02-09 18:59 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-09 18:59 [Patch v1 0/3] 2.21.0-rc0 test fixes resulting from use of /dev/zero randall.s.becker
2019-02-09 18:59 ` randall.s.becker [this message]
2019-02-10  2:05   ` [Patch v1 1/3] test-lib-functions.sh: add generate_zero_bytes function Eric Sunshine
2019-02-10 19:19     ` Randall S. Becker
2019-02-12  0:37     ` Jeff King
2019-02-12  1:17       ` Eric Sunshine
2019-02-12  2:47         ` randall.s.becker
2019-02-09 18:59 ` [Patch v1 2/3] t5318: replace use of /dev/zero with generate_zero_bytes randall.s.becker
2019-02-10  2:07   ` Eric Sunshine
2019-02-12 17:18     ` Junio C Hamano
2019-02-13 17:25       ` Junio C Hamano
2019-02-13 18:18         ` Randall S. Becker
2019-02-13 21:00           ` Junio C Hamano
2019-02-13 21:03             ` Randall S. Becker
2019-02-09 18:59 ` [Patch v1 3/3] t5562: replace /dev/zero with a pipe from generate_zero_bytes randall.s.becker
2019-02-10  2:12   ` Eric Sunshine
2019-02-12 17:24     ` Junio C Hamano
2019-02-12 20:50       ` Johannes Sixt
2019-02-13 17:26         ` Junio C Hamano
2019-02-15 16:42   ` [PATCH] t5562: do not depend on /dev/zero Max Kirillov
2019-02-15 17:13     ` Randall S. Becker
2019-02-15 18:00       ` Junio C Hamano
2019-02-15 18:10         ` Randall S. Becker
2019-02-15 18:45           ` Junio C Hamano

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