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#
# Create and set up a lower layer for the test scripts to use
#
from tool_box import *
import os, shutil
def create_file(name, content):
fd = open(name, "w")
fd.write(content)
fd.close()
def set_up(ctx):
cfg = ctx.config()
lower_mntroot = cfg.lower_mntroot()
lowerdir = cfg.lowerdir()
testdir = cfg.testdir()
os.sync()
# Discard anything already mounted on the mountpoint to avoid contamination
# as unionmount tries to collect all the mounts located there into the
# union.
if cfg.testing_unionmount():
try:
while system("umount " + cfg.union_mntroot() + " >&/dev/null"):
pass
except RuntimeError:
pass
if cfg.testing_overlayfs():
try:
while system("grep 'lower_layer " + lower_mntroot + "' /proc/mounts >/dev/null" +
" && umount " + lower_mntroot):
pass
except RuntimeError:
pass
try:
while system("grep 'upper_layer " + cfg.upper_mntroot() + "' /proc/mounts >/dev/null" +
" && umount " + cfg.upper_mntroot()):
pass
except RuntimeError:
pass
try:
while system("grep 'overlayfs " + cfg.union_mntroot() + "' /proc/mounts >/dev/null" +
" && umount " + cfg.union_mntroot()):
pass
except RuntimeError:
pass
# Create a lower layer to union over
if not os.path.exists(lower_mntroot):
os.makedirs(lower_mntroot)
system("mount -t tmpfs lower_layer " + lower_mntroot)
# Systemd has weird ideas about things
system("mount --make-private " + lower_mntroot)
#
# Create a few test files we can use in the lower layer
#
os.mkdir(lowerdir)
pieces = testdir.split("/")
del pieces[0]
path = ""
for i in pieces:
path += "/" + i
ctx.record_file(path, "d")
ctx.set_cwd(testdir)
for i in range(100, 130):
si = str(i)
# Under the test directory, we create a bunch of regular files
# containing data called foo100 to foo129:
create_file(lowerdir + "/foo" + si, ":xxx:yyy:zzz")
rec = ctx.record_file("foo" + si, "r")
# Then we create a bunch of direct symlinks to those files
to = "../a/foo" + si
os.symlink(to, lowerdir + "/direct_sym" + si)
rec = ctx.record_file("direct_sym" + si, "s", to, rec)
# Then we create a bunch of indirect symlinks to those files
to = "direct_sym" + si
os.symlink(to, lowerdir + "/indirect_sym" + si)
ctx.record_file("indirect_sym" + si, "s", to, rec)
# Then we create a bunch symlinks that don't point to extant files
to = "no_foo" + si
os.symlink(to, lowerdir + "/pointless" + si)
rec = ctx.record_file("no_foo" + si, None)
ctx.record_file("pointless" + si, "s", to, rec)
# We create a bunch of directories, each with an empty file
# and a populated subdir
os.mkdir(lowerdir + "/dir" + si)
rec = ctx.record_file("dir" + si, "d")
create_file(lowerdir + "/dir" + si + "/a", "")
ctx.record_file("dir" + si + "/a", "f")
os.mkdir(lowerdir + "/dir" + si + "/pop")
ctx.record_file("dir" + si + "/pop", "d")
create_file(lowerdir + "/dir" + si + "/pop/b", ":aaa:bbb:ccc")
ctx.record_file("dir" + si + "/pop/b", "f")
os.mkdir(lowerdir + "/dir" + si + "/pop/c")
ctx.record_file("dir" + si + "/pop/c", "d")
# And add direct and indirect symlinks to those
to = "../a/dir" + si
os.symlink(to, lowerdir + "/direct_dir_sym" + si)
rec = ctx.record_file("direct_dir_sym" + si, "s", to, rec)
#ctx.record_file("direct_dir_sym" + si + "/a", "f")
to = "direct_dir_sym" + si
os.symlink(to, lowerdir + "/indirect_dir_sym" + si)
ctx.record_file("indirect_dir_sym" + si, "s", to, rec)
#ctx.record_file("indirect_dir_sym" + si + "/a", "f")
# And a bunch of empty directories
os.mkdir(lowerdir + "/empty" + si)
ctx.record_file("empty" + si, "d")
# Everything above is then owned by the bin user
for f in [ "foo", "direct_sym", "indirect_sym", "pointless" ]:
os.lchown(lowerdir + "/" + f + si, 1, 1)
# Create some root-owned regular files also
create_file(lowerdir + "/rootfile" + si, ":xxx:yyy:zzz")
ctx.record_file("rootfile" + si, "r")
# Non-existent dir
ctx.record_file("no_dir" + si, None)
# The mount has to be read-only for us to make use of it
system("mount -o remount,ro " + lower_mntroot)
ctx.note_lower_fs(lowerdir)
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