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From 43e2ea9a31c301e162507a3f656b8719454df086 Mon Sep 17 00:00:00 2001
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From: Stefan Hajnoczi <stefanha@redhat.com>
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Date: Tue, 6 Aug 2013 15:44:49 +0800
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Subject: [PATCH 03/13] qemu-iotests: add poke_file utility function
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Message-id: <1377573001-27070-4-git-send-email-famz@redhat.com>
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Patchwork-id: 53783
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O-Subject: [RHEL-7 qemu-kvm PATCH 03/13] qemu-iotests: add poke_file utility function
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Bugzilla: 995866
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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The new poke_file function sets bytes at an offset in a file given a
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printf-style format string. It can be used to corrupt an image file for
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test coverage of error paths.
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 23ea2ecc2a43d850bc9482068201ece5da36a448)
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Signed-off-by: Fam Zheng <famz@redhat.com>
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---
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tests/qemu-iotests/common.rc | 6 ++++++
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1 files changed, 6 insertions(+), 0 deletions(-)
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diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
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index 1e9b2f4..1187b86 100644
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--- a/tests/qemu-iotests/common.rc
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+++ b/tests/qemu-iotests/common.rc
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@@ -34,6 +34,12 @@ dd()
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fi
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}
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+# poke_file 'test.img' 512 '\xff\xfe'
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+poke_file()
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+{
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+ printf "$3" | dd "of=$1" bs=1 "seek=$2" conv=notrunc &>/dev/null
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+}
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+
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# we need common.config
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if [ "$iam" != "check" ]
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then
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--
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1.7.1
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