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firewall: save firewall.xml with utils.replace_file()

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Don't rewrite the file in-place.

Also change the error message from 'save error' to 'firewall save
error'.
This commit is contained in:
Rusty Bird 2021-02-10 12:58:00 +00:00
parent c988a2218b
commit 7159f206a5
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GPG Key ID: 469D78F47AAF2ADF
1 changed files with 7 additions and 7 deletions
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14
qubes/firewall.py
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@ -31,6 +31,7 @@ import asyncio
import lxml.etree
import qubes
import qubes.utils
import qubes.vm.qubesvm
@ -577,14 +578,13 @@ class Firewall:
xml_tree = lxml.etree.ElementTree(xml_root)
try:
old_umask = os.umask(0o002)
with open(firewall_conf, 'wb') as firewall_xml:
xml_tree.write(firewall_xml, encoding="UTF-8",
pretty_print=True)
os.umask(old_umask)
with qubes.utils.replace_file(firewall_conf,
permissions=0o664) as tmp_io:
xml_tree.write(tmp_io, encoding='UTF-8', pretty_print=True)
except EnvironmentError as err:
self.vm.log.error("save error: {}".format(err))
raise qubes.exc.QubesException('save error: {}'.format(err))
msg='firewall save error: {}'.format(err)
self.vm.log.error(msg)
raise qubes.exc.QubesException(msg)
self.vm.fire_event('firewall-changed')