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#!/usr/bin/python
'''
targetctl
This file is part of RTSLib.
Copyright (c) 2013 by Red Hat, Inc.
Licensed under the Apache License, Version 2.0 (the "License"); you may
not use this file except in compliance with the License. You may obtain
a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
License for the specific language governing permissions and limitations
under the License.
'''
#
# A script to save/restore LIO configuration to/from a file in json format
#
from __future__ import print_function
from rtslib import RTSRoot
import os
import sys
import stat
import json
default_save_file = "/etc/target/saveconfig.json"
err = sys.stderr
def usage():
print("syntax: %s save [file_to_save_to]" % sys.argv[0], file=err)
print(" %s restore [file_to_restore_from]" % sys.argv[0], file=err)
print(" %s clear" % sys.argv[0], file=err)
print(" default file is: %s" % default_save_file, file=err)
sys.exit(-1)
def save(to_file):
with open(to_file+".temp", "w+") as f:
os.fchmod(f.fileno(), stat.S_IRUSR | stat.S_IWUSR)
f.write(json.dumps(RTSRoot().dump(), sort_keys=True, indent=2))
f.write("\n")
os.fsync(f.fileno())
os.rename(to_file+".temp", to_file)
def restore(from_file):
if not os.path.isfile(from_file):
print("Restore file %s not found" % from_file, file=err)
sys.exit(-1)
with open(from_file, "r") as f:
try:
config = json.loads(f.read())
except ValueError:
print("Error parsing savefile: %s" % from_file, file=err)
sys.exit(-1)
errors = RTSRoot().restore(config, clear_existing=True)
if errors:
print("Restore failed, %d errors:" % len(errors), file=err)
for error in errors:
print(error, file=err)
sys.exit(-1)
def clear(unused):
RTSRoot().clear_existing(confirm=True)
funcs = dict(save=save, restore=restore, clear=clear)
def main():
if os.geteuid() != 0:
print("Must run as root", file=err)
sys.exit(-1)
if len(sys.argv) < 2 or len(sys.argv) > 3:
usage()
if sys.argv[1] == "--help":
usage()
if sys.argv[1] not in funcs.keys():
usage()
if len(sys.argv) == 3:
savefile = os.path.expanduser(sys.argv[1])
else:
savefile = default_save_file
funcs[sys.argv[1]](savefile)
if __name__ == "__main__":
main()
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