Rework postinstall unittests to pass on Android.
Postinstall unittests were creating and mounting an image on each test
run. This patch adds several test scripts to one of the pre-generated
images and uses that image during postinstall testing instead.
To workaround problems with mount/umount of loop devices on Android,
this patch rewrites the `losetup` logic to make the appropriate
syscalls and create the loop device with mknod if it doesn't exists.
The tests require some extra SELinux policies to run in enforcing mode.
Bug: 26955860
TEST=Ran all Postinstall unittests.
Change-Id: I47a56b80b97596bc65ffe30cbc8118f05faff0ae
diff --git a/sample_images/generate_images.sh b/sample_images/generate_images.sh
index 17bb11c..c9936c1 100755
--- a/sample_images/generate_images.sh
+++ b/sample_images/generate_images.sh
@@ -124,6 +124,49 @@
EOF
}
+add_files_postinstall() {
+ local mntdir="$1"
+
+ sudo mkdir -p "${mntdir}"/bin >/dev/null
+
+ # A postinstall bash program.
+ sudo tee "${mntdir}"/bin/postinst_example >/dev/null <<EOF
+#!/etc/../bin/sh
+echo "I'm a postinstall program and I know how to write to stdout"
+echo "My call was $@"
+exit 0
+EOF
+
+ # A symlink to another program. This should also work.
+ sudo ln -s "postinst_example" "${mntdir}"/bin/postinst_link
+
+ sudo tee "${mntdir}"/bin/postinst_fail3 >/dev/null <<EOF
+#!/etc/../bin/sh
+exit 3
+EOF
+
+ sudo tee "${mntdir}"/bin/postinst_fail1 >/dev/null <<EOF
+#!/etc/../bin/sh
+exit 1
+EOF
+
+ # A postinstall bash program.
+ sudo tee "${mntdir}"/bin/self_check_context >/dev/null <<EOF
+#!/etc/../bin/sh
+echo "This is my context:"
+ls -lZ "\$0" | grep -F ' u:object_r:postinstall_file:s0 ' || exit 5
+exit 0
+EOF
+
+ sudo tee "${mntdir}"/postinst >/dev/null <<EOF
+#!/etc/../bin/sh
+echo "postinst"
+exit 0
+EOF
+
+ sudo chmod +x "${mntdir}"/postinst "${mntdir}"/bin/*
+}
+
# generate_fs <filename> <kind> <size> [block_size] [block_groups]
generate_fs() {
local filename="$1"
@@ -152,6 +195,7 @@
case "${kind}" in
ue_settings)
add_files_ue_settings "${mntdir}" "${block_size}"
+ add_files_postinstall "${mntdir}" "${block_size}"
;;
default)
add_files_default "${mntdir}" "${block_size}"
@@ -179,7 +223,7 @@
generate_image disk_ext2_1k default 16777216 1024
generate_image disk_ext2_4k default 16777216 4096
generate_image disk_ext2_4k_empty empty $((1024 * 4096)) 4096
- generate_image disk_ext2_ue_settings ue_settings 16777216 4096
+ generate_image disk_ext2_ue_settings ue_settings $((1024 * 4096)) 4096
# Generate the tarball and delete temporary images.
echo "Packing tar file sample_images.tar.bz2"