btrfs-progs/tests/common

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#!/bin/bash
#
# Common routines for all tests
#
_fail()
{
echo "$*" | tee -a $RESULT
exit 1
}
_not_run()
{
echo " [NOTRUN] $*"
exit 0
}
run_check()
{
echo "############### $@" >> $RESULT 2>&1
"$@" >> $RESULT 2>&1 || _fail "failed: $@"
}
check_prereq()
{
if ! [ -f $top/$1 ]; then
_fail "Failed prerequisities: $1";
fi
}
check_image()
{
image=$1
echo "testing image $(basename $image)" >> $RESULT
$top/btrfs check $image >> $RESULT 2>&1
[ $? -eq 0 ] && _fail "btrfs check should have detected corruption"
run_check $top/btrfs check --repair $image
run_check $top/btrfs check $image
}
check_all_images()
{
dir=$1
for i in $(find $dir -iname '*.img')
do
echo "extracting image $(basename $i)" >> $RESULT
$top/btrfs-image -r $i $i.restored || \
_fail "failed to extract image $i"
check_image $i.restored
rm $i.restored
done
}
# some tests need to mount the recovered image and do verifications call
# 'setup_root_helper' and then check for have_root_helper == 1 if the test
# needs to fail otherwise; using sudo by default for now
SUDO_HELPER=
NEED_SUDO_VALIDATE=unknown
export SUDO_HELPER
export NEED_SUDO_VALIDATE
root_helper()
{
if [ $UID -eq 0 ]; then
"$@"
else
if [ "$NEED_SUDO_VALIDATE" = 'yes' ]; then
sudo -v -n &>/dev/null || \
_not_run "Need to validate sudo credentials"
sudo -n "$@"
elif [ "$NEED_SUDO_VALIDATE" = 'no' ]; then
sudo -n /bin/true &> /dev/null || \
_not_run "Need to validate sudo user settings"
sudo -n "$@"
else
# should not happen
_not_run "Need to validate root privileges"
fi
fi
}
setup_root_helper()
{
if [ $UID -eq 0 ]; then
return
fi
# Test for old sudo or special settings, which make sudo -v fail even
# if user setting is NOPASSWD
sudo -n /bin/true &>/dev/null && NEED_SUDO_VALIDATE=no
# Newer sudo or default sudo setting
sudo -v -n &>/dev/null && NEED_SUDO_VALIDATE=yes
if [ "$NEED_SUDO_VALIDATE" = 'unknown' ]; then
_not_run "Need to validate root privileges"
fi
SUDO_HELPER=root_helper
}