Call sys_clone according to Linux doc

Call sys_clone with 5 arguments and pass flags as unsigned long, as
specified by the Linux doc.

Bug: crbug.com/1022674
Test: Unit tests pass
Change-Id: Icdeec084192cc744843ddf623fb1c82ce6e3c92f
1 file changed
tree: ad554521476f156fab3b73c8485dea09be86518d
  1. .clang-format
  2. .gitignore
  3. Android.bp
  4. CPPLINT.cfg
  5. CleanSpec.mk
  6. HACKING.md
  7. LICENSE
  8. MODULE_LICENSE_BSD
  9. Makefile
  10. NOTICE
  11. OWNERS
  12. PRESUBMIT.cfg
  13. PREUPLOAD.cfg
  14. README.md
  15. RELEASE.md
  16. TEST_MAPPING
  17. arch.h
  18. bpf.c
  19. bpf.h
  20. common.mk
  21. dump_constants.cc
  22. elfparse.c
  23. elfparse.h
  24. examples/
  25. gen_constants-inl.h
  26. gen_constants.c
  27. gen_constants.sh
  28. gen_syscalls.c
  29. gen_syscalls.sh
  30. get_googletest.sh
  31. libconstants.h
  32. libminijail-private.h
  33. libminijail.c
  34. libminijail.h
  35. libminijail.pc.in
  36. libminijail_unittest.cc
  37. libminijailpreload.c
  38. libsyscalls.h
  39. linux-x86/
  40. minijail0.1
  41. minijail0.5
  42. minijail0.c
  43. minijail0_cli.c
  44. minijail0_cli.h
  45. minijail0_cli_unittest.cc
  46. navbar.md
  47. parse_seccomp_policy.cc
  48. platform2_preinstall.sh
  49. scoped_minijail.h
  50. signal_handler.c
  51. signal_handler.h
  52. syscall_filter.c
  53. syscall_filter.h
  54. syscall_filter_unittest.cc
  55. syscall_filter_unittest_macros.h
  56. syscall_wrapper.c
  57. syscall_wrapper.h
  58. system.c
  59. system.h
  60. system_unittest.cc
  61. test/
  62. testrunner.cc
  63. tools/
  64. util.c
  65. util.h
  66. util_unittest.cc
README.md

Minijail

The Minijail homepage and main repo is https://android.googlesource.com/platform/external/minijail/.

There might be other copies floating around, but this is the official one!

What is it?

Minijail is a sandboxing and containment tool used in Chrome OS and Android. It provides an executable that can be used to launch and sandbox other programs, and a library that can be used by code to sandbox itself.

Getting the code

You're one git clone away from happiness.

$ git clone https://android.googlesource.com/platform/external/minijail
$ cd minijail

Releases are tagged as linux-vXX: https://android.googlesource.com/platform/external/minijail/+refs

Building

See the HACKING.md document for more details.

Release process

See the RELEASE.md document for more details.

Contact

We've got a couple of contact points.

Talks and presentations

The following talk serves as a good introduction to Minijail and how it can be used.

Video, slides.

Example usage

The Chromium OS project has a comprehensive sandboxing document that is largely based on Minijail.

After you play with the simple examples below, you should check that out.

Change root to any user

# id
uid=0(root) gid=0(root) groups=0(root),128(pkcs11)
# minijail0 -u jorgelo -g 5000 /usr/bin/id
uid=72178(jorgelo) gid=5000(eng) groups=5000(eng)

Drop root while keeping some capabilities

# minijail0 -u jorgelo -c 3000 -- /bin/cat /proc/self/status
Name: cat
...
CapInh: 0000000000003000
CapPrm: 0000000000003000
CapEff: 0000000000003000
CapBnd: 0000000000003000