1 |
Wraps snakeoil's simple_unshare; returns to the previous namespaces on |
2 |
context exit. Will be used by the next commit. |
3 |
|
4 |
Signed-off-by: Matt Turner <mattst88@g.o> |
5 |
--- |
6 |
catalyst/context.py | 32 ++++++++++++++++++++++++++++++++ |
7 |
catalyst/main.py | 17 +++++++---------- |
8 |
2 files changed, 39 insertions(+), 10 deletions(-) |
9 |
create mode 100644 catalyst/context.py |
10 |
|
11 |
diff --git a/catalyst/context.py b/catalyst/context.py |
12 |
new file mode 100644 |
13 |
index 00000000..936b5c6b |
14 |
--- /dev/null |
15 |
+++ b/catalyst/context.py |
16 |
@@ -0,0 +1,32 @@ |
17 |
+ |
18 |
+import contextlib |
19 |
+import os |
20 |
+ |
21 |
+from snakeoil.process.namespaces import setns, simple_unshare |
22 |
+ |
23 |
+@××××××××××.contextmanager |
24 |
+def namespace(mount=False, uts=False, ipc=False, net=False, pid=False, |
25 |
+ user=False, hostname=None): |
26 |
+ namespaces = { |
27 |
+ (mount, "mnt"): None, |
28 |
+ (uts, "uts"): None, |
29 |
+ (ipc, "ipc"): None, |
30 |
+ (net, "net"): None, |
31 |
+ (pid, "pid"): None, |
32 |
+ (user, "user"): None, |
33 |
+ } |
34 |
+ |
35 |
+ # Save fds of current namespaces |
36 |
+ for ns in [ns for ns in namespaces if ns[0]]: |
37 |
+ fp = open(f"/proc/self/ns/{ns[1]}") |
38 |
+ namespaces[ns] = fp |
39 |
+ |
40 |
+ simple_unshare(mount=mount, uts=uts, ipc=ipc, net=net, pid=pid, user=user, |
41 |
+ hostname=hostname) |
42 |
+ try: |
43 |
+ yield None |
44 |
+ finally: |
45 |
+ for ns in [ns for ns in namespaces if ns[0]]: |
46 |
+ fp = namespaces[ns] |
47 |
+ setns(fp.fileno(), 0) |
48 |
+ fp.close() |
49 |
diff --git a/catalyst/main.py b/catalyst/main.py |
50 |
index 543895c6..93a4a0d3 100644 |
51 |
--- a/catalyst/main.py |
52 |
+++ b/catalyst/main.py |
53 |
@@ -7,14 +7,13 @@ import textwrap |
54 |
|
55 |
import toml |
56 |
|
57 |
-from snakeoil.process import namespaces |
58 |
- |
59 |
from DeComp.definitions import (COMPRESS_DEFINITIONS, DECOMPRESS_DEFINITIONS, |
60 |
CONTENTS_DEFINITIONS) |
61 |
from DeComp.contents import ContentsMap |
62 |
|
63 |
from catalyst import log |
64 |
import catalyst.config |
65 |
+from catalyst.context import namespace |
66 |
from catalyst.defaults import (confdefaults, option_messages, |
67 |
DEFAULT_CONFIG_FILE, valid_config_file_values) |
68 |
from catalyst.support import CatalystError |
69 |
@@ -356,15 +355,13 @@ def _main(parser, opts): |
70 |
# use pid & user namespaces, but snakeoil's namespace module has signal |
71 |
# transfer issues (CTRL+C doesn't propagate), and user namespaces need |
72 |
# more work due to Gentoo build process (uses sudo/root/portage). |
73 |
- namespaces.simple_unshare( |
74 |
- mount=True, uts=True, ipc=True, pid=False, net=False, user=False, |
75 |
- hostname='catalyst') |
76 |
+ with namespace(mount=True, uts=True, ipc=True, hostname='catalyst'): |
77 |
+ # everything is setup, so the build is a go |
78 |
+ try: |
79 |
+ success = build_target(addlargs) |
80 |
+ except KeyboardInterrupt: |
81 |
+ log.critical('Catalyst build aborted due to user interrupt (Ctrl-C)') |
82 |
|
83 |
- # everything is setup, so the build is a go |
84 |
- try: |
85 |
- success = build_target(addlargs) |
86 |
- except KeyboardInterrupt: |
87 |
- log.critical('Catalyst build aborted due to user interrupt (Ctrl-C)') |
88 |
if not success: |
89 |
sys.exit(2) |
90 |
sys.exit(0) |
91 |
-- |
92 |
2.26.2 |