tests/qemu-iotests: Don't use 'seq' in the iotests

The 'seq' command is not available by default on OpenBSD, so these
iotests are currently failing there. It could be installed as 'gseq'
from the coreutils package - but since it is using a different name
there and we are running the iotests with the "bash" shell anyway,
let's simply use the built-in double parentheses for the for-loops
instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20190723111201.1926-1-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

tests/qemu-iotests/007

@@ -48,7 +48,7 @@ echo
 echo "creating image"
 _make_test_img 1M
 
-for i in `seq 1 10`; do
+for ((i=1;i<=10;i++)); do
     echo "savevm $i"
     $QEMU -nographic -hda "$TEST_IMG" -serial none -monitor stdio >/dev/null 2>&1 <<EOF
 savevm test-$i

tests/qemu-iotests/011

@@ -49,7 +49,7 @@ _make_test_img $size
 
 echo
 echo "overlapping I/O"
-for i in `seq 1 10`; do
+for ((i=1;i<=10;i++)); do
     let mb=1024*1024
     let off1=$i*$mb
     let off2=$off1+512

tests/qemu-iotests/032

@@ -52,7 +52,7 @@ _make_test_img 64M
 
 # Allocate every other cluster so that afterwards a big write request will
 # actually loop a while and issue many I/O requests for the lower layer
-for i in $(seq 0 128 4096); do echo "write ${i}k 64k"; done | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
+for ((i=0;i<=4096;i+=128)); do echo "write ${i}k 64k"; done | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 
 echo
 echo === AIO request during close ===

tests/qemu-iotests/035

@@ -49,7 +49,7 @@ echo "creating image"
 _make_test_img $size
 
 generate_requests() {
-    for i in $(seq 0 63); do
+    for ((i=0;i<=63;i++)); do
         echo "aio_write ${i}M 512"
         echo "aio_write ${i}M 512"
         echo "aio_write ${i}M 512"

tests/qemu-iotests/037

@@ -61,7 +61,7 @@ backing_io()
     local pattern=0
     local cur_sec=0
 
-    for i in $(seq 0 $((sectors - 1))); do
+    for ((i=0;i<=$((sectors - 1));i++)); do
         cur_sec=$((offset / 512 + i))
         pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 ))
 

tests/qemu-iotests/046

@@ -55,7 +55,7 @@ backing_io()
     local pattern=0
     local cur_sec=0
 
-    for i in $(seq 0 $((sectors - 1))); do
+    for ((i=0;i<=$((sectors - 1));i++)); do
         cur_sec=$((offset / 65536 + i))
         pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
 

tests/qemu-iotests/common.pattern

@@ -22,7 +22,7 @@ do_is_allocated() {
     local step=$3
     local count=$4
 
-    for i in `seq 1 $count`; do
+    for ((i=1;i<=$count;i++)); do
         echo alloc $(( start + (i - 1) * step )) $size
     done
 }
@@ -40,7 +40,7 @@ do_io() {
     local pattern=$6
 
     echo === IO: pattern $pattern >&2
-    for i in `seq 1 $count`; do
+    for ((i=1;i<=$count;i++)); do
         echo $op -P $pattern $(( start + (i - 1) * step )) $size
     done
 }