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Fix "Text file busy" exception in atomic_move (#9526) (#17204)

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tempfile.NamedTemporaryFile keeps a file handle causing os.rename() to fail with windows based vboxfs: [Errno 26] Text file busy.
Changed NamedTemporaryFile to mkstemp() and added a finally block to unlink the temp file in each and every case.
This commit is contained in:
Alexander Stock 2016-08-26 16:41:17 +02:00 • committed by Toshio Kuratomi
parent a942758a07
commit 238cccf166
2 changed files with 57 additions and 53 deletions
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84
lib/ansible/module_utils/basic.py
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@ -1944,55 +1944,59 @@ class AnsibleModule(object):
dest_dir = os.path.dirname(dest)
dest_file = os.path.basename(dest)
try:
tmp_dest = tempfile.NamedTemporaryFile(
tmp_dest_fd, tmp_dest_name = tempfile.mkstemp(
prefix=".ansible_tmp", dir=dest_dir, suffix=dest_file)
except (OSError, IOError):
e = get_exception()
self.fail_json(msg='The destination directory (%s) is not writable by the current user. Error was: %s' % (dest_dir, e))
try: # leaves tmp file behind when sudo and not root
if switched_user and os.getuid() != 0:
# cleanup will happen by 'rm' of tempdir
# copy2 will preserve some metadata
shutil.copy2(src, tmp_dest.name)
else:
shutil.move(src, tmp_dest.name)
if self.selinux_enabled():
self.set_context_if_different(
tmp_dest.name, context, False)
try:
try:
tmp_stat = os.stat(tmp_dest.name)
if dest_stat and (tmp_stat.st_uid != dest_stat.st_uid or tmp_stat.st_gid != dest_stat.st_gid):
os.chown(tmp_dest.name, dest_stat.st_uid, dest_stat.st_gid)
except OSError:
e = get_exception()
if e.errno != errno.EPERM:
raise
os.rename(tmp_dest.name, dest)
except (shutil.Error, OSError, IOError):
e = get_exception()
# sadly there are some situations where we cannot ensure atomicity, but only if
# the user insists and we get the appropriate error we update the file unsafely
if unsafe_writes and e.errno == errno.EBUSY:
#TODO: issue warning that this is an unsafe operation, but doing it cause user insists
# close tmp file handle before file operations to prevent text file busy errors on vboxfs synced folders (windows host)
os.close(tmp_dest_fd)
# leaves tmp file behind when sudo and not root
if switched_user and os.getuid() != 0:
# cleanup will happen by 'rm' of tempdir
# copy2 will preserve some metadata
shutil.copy2(src, tmp_dest_name)
else:
shutil.move(src, tmp_dest_name)
if self.selinux_enabled():
self.set_context_if_different(
tmp_dest_name, context, False)
try:
try:
out_dest = open(dest, 'wb')
in_src = open(src, 'rb')
shutil.copyfileobj(in_src, out_dest)
finally: # assuring closed files in 2.4 compatible way
if out_dest:
out_dest.close()
if in_src:
in_src.close()
except (shutil.Error, OSError, IOError):
tmp_stat = os.stat(tmp_dest_name)
if dest_stat and (tmp_stat.st_uid != dest_stat.st_uid or tmp_stat.st_gid != dest_stat.st_gid):
os.chown(tmp_dest_name, dest_stat.st_uid, dest_stat.st_gid)
except OSError:
e = get_exception()
self.fail_json(msg='Could not write data to file (%s) from (%s): %s' % (dest, src, e))
if e.errno != errno.EPERM:
raise
os.rename(tmp_dest_name, dest)
except (shutil.Error, OSError, IOError):
e = get_exception()
# sadly there are some situations where we cannot ensure atomicity, but only if
# the user insists and we get the appropriate error we update the file unsafely
if unsafe_writes and e.errno == errno.EBUSY:
#TODO: issue warning that this is an unsafe operation, but doing it cause user insists
try:
try:
out_dest = open(dest, 'wb')
in_src = open(src, 'rb')
shutil.copyfileobj(in_src, out_dest)
finally: # assuring closed files in 2.4 compatible way
if out_dest:
out_dest.close()
if in_src:
in_src.close()
except (shutil.Error, OSError, IOError):
e = get_exception()
self.fail_json(msg='Could not write data to file (%s) from (%s): %s' % (dest, src, e))
else:
self.fail_json(msg='Could not replace file: %s to %s: %s' % (src, dest, e))
self.cleanup(tmp_dest.name)
else:
self.fail_json(msg='Could not replace file: %s to %s: %s' % (src, dest, e))
finally:
self.cleanup(tmp_dest_name)
if creating:
# make sure the file has the correct permissions