t5300, t5302, t5303: Do not use /dev/zero

We do not have /dev/zero on Windows. This replaces it by data generated
with printf, perl, or echo. Most of the cases do not depend on that the
data is a stream of zero bytes, so we use something printable; nor is an
unlimited stream of data needed, so we produce only as many bytes as the
test cases need.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>

1 files changed, 8 insertions, 9 deletions

diff --git a/t/t5300-pack-object.sh b/t/t5300-pack-object.sh
index ccfc64c6ee..e2aa254eae 100755
--- a/t/t5300-pack-object.sh
+++ b/t/t5300-pack-object.sh
@@ -13,11 +13,10 @@ TRASH=`pwd`
 test_expect_success \
     'setup' \
     'rm -f .git/index*
-     for i in a b c
-     do
-	     dd if=/dev/zero bs=4k count=1 | perl -pe "y/\\000/$i/" >$i &&
-	     git update-index --add $i || return 1
-     done &&
+     perl -e "print \"a\" x 4096;" > a &&
+     perl -e "print \"b\" x 4096;" > b &&
+     perl -e "print \"c\" x 4096;" > c &&
+     git update-index --add a b c &&
      cat c >d && echo foo >>d && git update-index --add d &&
      tree=`git write-tree` &&
      commit=`git commit-tree $tree </dev/null` && {
@@ -221,7 +220,7 @@ test_expect_success \
 test_expect_success \
     'verify-pack catches a corrupted pack signature' \
     'cat test-1-${packname_1}.pack >test-3.pack &&
-     dd if=/dev/zero of=test-3.pack count=1 bs=1 conv=notrunc seek=2 &&
+     echo | dd of=test-3.pack count=1 bs=1 conv=notrunc seek=2 &&
      if git verify-pack test-3.idx
      then false
      else :;
@@ -230,7 +229,7 @@ test_expect_success \
 test_expect_success \
     'verify-pack catches a corrupted pack version' \
     'cat test-1-${packname_1}.pack >test-3.pack &&
-     dd if=/dev/zero of=test-3.pack count=1 bs=1 conv=notrunc seek=7 &&
+     echo | dd of=test-3.pack count=1 bs=1 conv=notrunc seek=7 &&
      if git verify-pack test-3.idx
      then false
      else :;
@@ -239,7 +238,7 @@ test_expect_success \
 test_expect_success \
     'verify-pack catches a corrupted type/size of the 1st packed object data' \
     'cat test-1-${packname_1}.pack >test-3.pack &&
-     dd if=/dev/zero of=test-3.pack count=1 bs=1 conv=notrunc seek=12 &&
+     echo | dd of=test-3.pack count=1 bs=1 conv=notrunc seek=12 &&
      if git verify-pack test-3.idx
      then false
      else :;
@@ -250,7 +249,7 @@ test_expect_success \
     'l=`wc -c <test-3.idx` &&
      l=`expr $l - 20` &&
      cat test-1-${packname_1}.pack >test-3.pack &&
-     dd if=/dev/zero of=test-3.idx count=20 bs=1 conv=notrunc seek=$l &&
+     printf "%20s" "" | dd of=test-3.idx count=20 bs=1 conv=notrunc seek=$l &&
      if git verify-pack test-3.pack
      then false
      else :;