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#!/usr/bin/env python3
import subprocess
import pytest
import os
import stat
import time
from os.path import join as pjoin
basename = pjoin(os.path.dirname(__file__), '..')
def wait_for_mount(mount_process, mnt_dir,
test_fn=os.path.ismount):
elapsed = 0
while elapsed < 30:
if test_fn(mnt_dir):
return True
if mount_process.poll() is not None:
pytest.fail('file system process terminated prematurely')
time.sleep(0.1)
elapsed += 0.1
pytest.fail("mountpoint failed to come up")
def cleanup(mnt_dir):
# Don't bother trying Valgrind if things already went wrong
subprocess.call([pjoin(basename, 'util', 'fusermount3'),
'-z', '-u', mnt_dir],
stdout=subprocess.DEVNULL,
stderr=subprocess.STDOUT)
def umount(mount_process, mnt_dir):
# fusermount3 will be setuid root, so we can only trace it with
# valgrind if we're root
if os.getuid() == 0:
cmdline = base_cmdline
else:
cmdline = []
cmdline = cmdline + [ pjoin(basename, 'util', 'fusermount3'),
'-z', '-u', mnt_dir ]
subprocess.check_call(cmdline)
assert not os.path.ismount(mnt_dir)
# Give mount process a little while to terminate. Popen.wait(timeout)
# was only added in 3.3...
elapsed = 0
while elapsed < 30:
code = mount_process.poll()
if code is not None:
if code == 0:
return
pytest.fail('file system process terminated with code %s' % (code,))
time.sleep(0.1)
elapsed += 0.1
pytest.fail('mount process did not terminate')
def safe_sleep(secs):
'''Like time.sleep(), but sleep for at least *secs*
`time.sleep` may sleep less than the given period if a signal is
received. This function ensures that we sleep for at least the
desired time.
'''
now = time.time()
end = now + secs
while now < end:
time.sleep(end - now)
now = time.time()
def fuse_test_marker():
'''Return a pytest.marker that indicates FUSE availability
If system/user/environment does not support FUSE, return
a `pytest.mark.skip` object with more details. If FUSE is
supported, return `pytest.mark.uses_fuse()`.
'''
skip = lambda x: pytest.mark.skip(reason=x)
with subprocess.Popen(['which', 'fusermount3'], stdout=subprocess.PIPE,
universal_newlines=True) as which:
fusermount_path = which.communicate()[0].strip()
if not fusermount_path or which.returncode != 0:
return skip("Can't find fusermount executable")
if not os.path.exists('/dev/fuse'):
return skip("FUSE kernel module does not seem to be loaded")
if os.getuid() == 0:
return pytest.mark.uses_fuse()
mode = os.stat(fusermount_path).st_mode
if mode & stat.S_ISUID == 0:
return skip('fusermount executable not setuid, and we are not root.')
try:
fd = os.open('/dev/fuse', os.O_RDWR)
except OSError as exc:
return skip('Unable to open /dev/fuse: %s' % exc.strerror)
else:
os.close(fd)
return pytest.mark.uses_fuse()
# Use valgrind if requested
if os.environ.get('TEST_WITH_VALGRIND', 'no').lower().strip() \
not in ('no', 'false', '0'):
base_cmdline = [ 'valgrind', '-q', '--' ]
else:
base_cmdline = []
# Try to use local fusermount3
os.environ['PATH'] = '%s:%s' % (pjoin(basename, 'util'), os.environ['PATH'])
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