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Code Issues Releases Wiki Activity

Correctly handle multiple LD_PRELOAD entries; fixes #1111

This commit is contained in:
James Clarke 2016-06-19 22:04:03 +01:00 committed by Marian Beermann
parent 98530fffd3
commit 2c616527cf
1 changed files with 14 additions and 9 deletions
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23
borg/xattr.py
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@ -2,6 +2,7 @@
"""
import errno
import os
import re
import subprocess
import sys
import tempfile
@ -52,16 +53,20 @@ if libc_name is None:
# the 'test_extract_capabilities' test, but also allows xattrs to work with fakeroot on Linux in normal use.
# TODO: Check whether fakeroot supports xattrs on all platforms supported below.
# TODO: If that's the case then we can make Borg fakeroot-xattr-compatible on these as well.
LD_PRELOAD = os.environ.get('LD_PRELOAD', '')
XATTR_FAKEROOT = False
if sys.platform.startswith('linux') and 'fakeroot' in LD_PRELOAD:
fakeroot_version = LooseVersion(subprocess.check_output(['fakeroot', '-v']).decode('ascii').split()[-1])
if fakeroot_version >= LooseVersion("1.20.2"):
# 1.20.2 has been confirmed to have xattr support
# 1.18.2 has been confirmed not to have xattr support
# Versions in-between are unknown
libc_name = LD_PRELOAD
XATTR_FAKEROOT = True
if sys.platform.startswith('linux'):
LD_PRELOAD = os.environ.get('LD_PRELOAD', '')
preloads = re.split("[ :]", LD_PRELOAD)
for preload in preloads:
if preload.startswith("libfakeroot"):
fakeroot_version = LooseVersion(subprocess.check_output(['fakeroot', '-v']).decode('ascii').split()[-1])
if fakeroot_version >= LooseVersion("1.20.2"):
# 1.20.2 has been confirmed to have xattr support
# 1.18.2 has been confirmed not to have xattr support
# Versions in-between are unknown
libc_name = preload
XATTR_FAKEROOT = True
break
try:
libc = CDLL(libc_name, use_errno=True)