[kvm-unit-tests PATCH 1/5] arch/run: simplify copy-paste of the command line

["Radim Krčmář" <rkrcmar@redhat.com>]

The major annoyance coming from errata was "-initrd `mktemp`" that had
to be removed before running the copy-pasted command line.
Move "-initrd ..." part at the end of the line and hide it behind "#" if
the initird file is a temporary one.

This patch also brings s390 to use the same code as other architectures
and eliminates code duplication.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
---
Adding the arch/run command line might also be worth it
(i.e. adding echo $0 $@ to arch/run).
---
 arm/run               |  5 +----
 powerpc/run           |  5 +----
 s390x/run             |  2 --
 scripts/arch-run.bash | 18 ++++++++++++++++--
 x86/run               |  5 +----
 5 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/arm/run b/arm/run
index 1b1602c74970..8d8918a461dc 100755
--- a/arm/run
+++ b/arm/run
@@ -71,12 +71,9 @@ if $qemu $M -device '?' 2>&1 | grep pci-testdev > /dev/null; then
 	pci_testdev="-device pci-testdev"
 fi
 
-initrd_create
-
 M+=",accel=$ACCEL"
 command="$qemu -nodefaults $M -cpu $processor $chr_testdev $pci_testdev"
-command+=" -display none -serial stdio $INITRD -kernel"
+command+=" -display none -serial stdio -kernel"
 command="$(timeout_cmd) $command"
-echo $command "$@"
 
 run_qemu $command "$@"
diff --git a/powerpc/run b/powerpc/run
index 7ccf1a36ff49..3fd5a91aeffb 100755
--- a/powerpc/run
+++ b/powerpc/run
@@ -35,14 +35,11 @@ if ! $qemu -machine '?' 2>&1 | grep 'pseries' > /dev/null; then
 	exit 2
 fi
 
-initrd_create
-
 M='-machine pseries'
 M+=",accel=$ACCEL"
 command="$qemu -nodefaults $M -bios $FIRMWARE"
-command+=" -display none -serial stdio $INITRD -kernel"
+command+=" -display none -serial stdio -kernel"
 command="$(migration_cmd) $(timeout_cmd) $command"
-echo $command "$@"
 
 # powerpc tests currently exit with rtas-poweroff, which exits with 0.
 # run_qemu treats that as a failure exit and returns 1, so we need
diff --git a/s390x/run b/s390x/run
index cf333de9ccce..89210f4fb6b6 100755
--- a/s390x/run
+++ b/s390x/run
@@ -34,10 +34,8 @@ M='-machine s390-ccw-virtio'
 M+=",accel=$ACCEL"
 command="$qemu -nodefaults -nographic $M"
 command+=" -chardev stdio,id=con0 -device sclpconsole,chardev=con0"
-[ -f "$ENV" ] && command+=" -initrd $ENV"
 command+=" -kernel"
 command="$(timeout_cmd) $command"
-echo $command "$@"
 
 # We return the exit code via stdout, not via the QEMU return code
 lines=$(run_qemu $command "$@")
diff --git a/scripts/arch-run.bash b/scripts/arch-run.bash
index 7c6c79ad3a9d..8ad37e4ebf97 100644
--- a/scripts/arch-run.bash
+++ b/scripts/arch-run.bash
@@ -28,9 +28,14 @@ run_qemu ()
 {
 	local stdout errors ret sig
 
+	echo -n $@
+	initrd_create &&
+		echo -n " #"
+	echo " $INITRD"
+
 	# stdout to {stdout}, stderr to $errors and stderr
 	exec {stdout}>&1
-	errors=$("${@}" </dev/null 2> >(tee /dev/stderr) > /dev/fd/$stdout)
+	errors=$("${@}" $INITRD </dev/null 2> >(tee /dev/stderr) > /dev/fd/$stdout)
 	ret=$?
 	exec {stdout}>&-
 
@@ -158,14 +163,20 @@ search_qemu_binary ()
 
 initrd_create ()
 {
+	local ret
+
 	env_add_errata
+	ret=$?
+
 	unset INITRD
 	[ -f "$ENV" ] && INITRD="-initrd $ENV"
+
+	return $ret
 }
 
 env_add_errata ()
 {
-	local line errata
+	local line errata ret=1
 
 	if [ -f "$ENV" ] && grep -q '^ERRATA_' <(env); then
 		for line in $(grep '^ERRATA_' "$ENV"); do
@@ -183,7 +194,10 @@ env_add_errata ()
 		trap_exit_push 'rm -f $ENV; [ "$ENV_OLD" ] && export ENV="$ENV_OLD" || unset ENV; unset ENV_OLD'
 		[ -f "$ENV_OLD" ] && grep -v '^ERRATA_' "$ENV_OLD" > $ENV
 		grep '^ERRATA_' <(env) >> $ENV
+		ret=0
 	fi
+
+	return $ret
 }
 
 env_generate_errata ()
diff --git a/x86/run b/x86/run
index 88f5ff771140..a06a7c0f80c8 100755
--- a/x86/run
+++ b/x86/run
@@ -33,11 +33,8 @@ else
 	pc_testdev="-device testdev,chardev=testlog -chardev file,id=testlog,path=msr.out"
 fi
 
-initrd_create
-
 command="${qemu} -nodefaults -enable-kvm $pc_testdev -vnc none -serial stdio $pci_testdev $hyperv_testdev"
-command+=" $INITRD -kernel"
+command+=" -kernel"
 command="$(timeout_cmd) $command"
-echo ${command} "$@"
 
 run_qemu ${command} "$@"
-- 
2.13.2