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Check if /tmp is mounted with noexec

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If /tmp is mounted with noexec, use ~/.local/share/Conty as a working directory. And if HOME is also mounted with noexec, then show an error and exit.
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Kron4ek 2021-06-08 19:13:49 +05:00 committed by GitHub
parent 0751d00bab
commit 5eb93c9127
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 48 additions and 7 deletions
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55
conty-start.sh
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@ -12,7 +12,7 @@ if [ $EUID = 0 ] && [ -z "$ALLOW_ROOT" ]; then
exit 1
fi
script_version="1.12"
script_version="1.13"
# Full path to the script
script_literal="${BASH_SOURCE[0]}"
@ -26,11 +26,15 @@ script_id="${RANDOM}"
# Working directory where the utils will be extracted
# And where the squashfs image will be mounted
# The default path is /tmp/scriptname_username_md5
# The default path is /tmp/scriptname_username_scriptmd5
# And if /tmp is mounted with noexec, the default path
# is ~/.local/share/Conty/scriptname_username_scriptmd5
conty_dir_name="$(basename "${script}")"_"${USER}"_"${script_md5}"
if [ -z "${BASE_DIR}" ]; then
export working_dir=/tmp/"$(basename "${script}")"_"${USER}"_"${script_md5}"
export working_dir=/tmp/"${conty_dir_name}"
else
export working_dir="${BASE_DIR}"/"$(basename "${script}")"_"${USER}"_"${script_md5}"
export working_dir="${BASE_DIR}"/"${conty_dir_name}"
fi
mount_point="${working_dir}"/mnt
@ -39,7 +43,7 @@ mount_point="${working_dir}"/mnt
# a problem with mounting the squashfs image due to an incorrectly calculated offset.
# The size of this script
scriptsize=18334
scriptsize=19305
# The size of the utils.tar archive
# utils.tar contains bwrap and squashfuse binaries
@ -259,13 +263,34 @@ fi
mkdir -p "${working_dir}"
if [ "${USE_SYS_UTILS}" != 1 ]; then
# Check if filesystem of the working_dir is mounted without noexec
if ! exec_test; then
if [ -z "${BASE_DIR}" ]; then
export working_dir="${HOME}"/.local/share/Conty/"${conty_dir_name}"
fi
if ! exec_test; then
echo "Seems like /tmp is mounted with noexec or you don't have write access!"
echo "Please remount it without noexec or set BASE_DIR to a different location."
exit 1
fi
fi
mount_tool="${working_dir}"/utils/squashfuse
bwrap="${working_dir}"/utils/bwrap
if [ ! -f "${mount_tool}" ] || [ ! -f "${bwrap}" ]; then
tail -c +$((scriptsize+1)) "${script}" | head -c $utilssize > "${working_dir}"/utils.tar
tar -C "${working_dir}" -xf "${working_dir}"/utils.tar
rm "${working_dir}"/utils.tar
rm -f "${working_dir}"/utils.tar
if [ ! -f "${mount_tool}" ] || [ ! -f "${bwrap}" ]; then
echo "The utilities were not extracted!"
echo "Perhaps something is wrong with the integrated utils.tar."
exit 1
fi
chmod +x "${mount_tool}"
chmod +x "${bwrap}"
@ -289,12 +314,28 @@ else
exit 1
fi
echo "Using system squashfuse and bwrap"
echo "Using system-wide squashfuse and bwrap"
mount_tool=squashfuse
bwrap=bwrap
fi
exec_test () {
mkdir -p "${working_dir}"
exec_test_file="${working_dir}"/exec_test
rm -f "${exec_test_file}"
touch "${exec_test_file}"
chmod +x "${exec_test_file}"
if [ ! -x "${exec_test_file}" ]; then
return 1
else
return 0
fi
}
run_bwrap () {
if [ "$DISABLE_NET" = 1 ]; then
echo "Network is disabled"