Mini Shell

#!/opt/cloudlinux/venv/bin/python3 -bb
#
#Copyright (c) 2013 Cloud Linux LTD
#All rights reserved.
#
#Redistribution and use in source and binary forms, with or without
#modification, are permitted provided that the following conditions
#are met:
#  * Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#  * Redistributions in binary form must reproduce the above
#    copyright notice, this list of conditions and the following
#    disclaimer in the documentation and/or other materials provided
#    with the distribution.
#  * The names of its contributors may not be used to endorse or
#    promote products derived from this software without specific
#    prior written permission.
#
#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
#"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
#LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
#FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
#COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
#INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
#BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
#LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
#CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
#LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
#ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
#POSSIBILITY OF SUCH DAMAGE.
#


from __future__ import print_function
from __future__ import absolute_import
from __future__ import division
from __future__ import unicode_literals
from future import standard_library
standard_library.install_aliases()
from builtins import *
import os
import sys

CL_SELECTOR_PATH = "/etc/cl.selector/"


# Detect PHP version (works only in CageFS)
def detect_php_version():
	# read link /etc/cl.selector/php
	#  --> /opt/alt/php54/usr/bin/php-cgi
	# or
	#  --> /usr/selector/php
	#	path = BASEDIR + '/' + prefix + '/' + username + '/etc/cl.selector/'
	user_php_file = CL_SELECTOR_PATH + 'php'
	if not os.path.islink(user_php_file):
		user_php_file = CL_SELECTOR_PATH + 'lsphp'
		if not os.path.islink(user_php_file):
			return None, None
	link_to = os.readlink(user_php_file)
	if link_to.startswith('/usr/selector/'):
		return 'native', user_php_file
	# PHP ver is not native, determine version from link_to
	if link_to.startswith('/opt/alt/php'):
		php_ver = link_to.replace('/opt/alt/php', '')
		php_ver = php_ver[:php_ver.find('/')]
		return php_ver, user_php_file
	# PHP version not determined
	return None, None


def main():
	try:
		user_php_version, call_php_name = detect_php_version()

		if user_php_version is None or call_php_name is None or user_php_version == "native":
			# Copy of Plesk original wrapper
			binary_path = "/var/www/cgi-bin/cgi_wrapper/cgi_wrapper.orig.cagefs"
			# Plesk original wrapper location (will be passed as argv[0])
			args = ["/var/www/cgi-bin/cgi_wrapper/cgi_wrapper"]
		else:
			# alternative php
			binary_path = call_php_name
			args = [call_php_name, '-c', '/etc/php.ini']

		# append args
		args.extend(sys.argv[1:])

		# call php or plesk wrapper
		os.execv(binary_path, args)

		# execv function does not return when successful
		raise Exception('Error in CageFS cgi_wrapper: os.execv() failed')

	except Exception as e:
		print(str(e), file=sys.stderr)
		sys.exit(1)


if __name__ == "__main__":
	main()