Migrate "io_jail" crate from crosvm and rename to "minijail".

As part of this change minijail-sys was relocated to rust/minijail-sys.

This adds minijail crate which provides an interface to libminijail
through minijail-sys that conforms to idomatic Rust. It was originally a
part of crosvm.

Bug: crbug.com/1096175
Test: cargo test
Change-Id: I048b81e7f5f92791aa7453b063d45534891707fe
9 files changed
tree: c12462bccb06babed5abc2a8e153f3ff5b04d259
  1. .clang-format
  2. .github/
  3. .gitignore
  4. Android.bp
  5. CPPLINT.cfg
  6. CleanSpec.mk
  7. HACKING.md
  8. LICENSE
  9. METADATA
  10. MODULE_LICENSE_BSD
  11. Makefile
  12. NOTICE
  13. OWNERS
  14. OWNERS.rust
  15. PRESUBMIT.cfg
  16. PREUPLOAD.cfg
  17. README.md
  18. RELEASE.md
  19. TEST_MAPPING
  20. arch.h
  21. bpf.c
  22. bpf.h
  23. common.mk
  24. dump_constants.cc
  25. elfparse.c
  26. elfparse.h
  27. examples/
  28. gen_constants-inl.h
  29. gen_constants.c
  30. gen_constants.sh
  31. gen_syscalls.c
  32. gen_syscalls.sh
  33. get_googletest.sh
  34. libconstants.h
  35. libminijail-private.h
  36. libminijail.c
  37. libminijail.h
  38. libminijail.pc.in
  39. libminijail_unittest.cc
  40. libminijailpreload.c
  41. libsyscalls.h
  42. linux-x86/
  43. minijail0.1
  44. minijail0.5
  45. minijail0.c
  46. minijail0_cli.c
  47. minijail0_cli.h
  48. minijail0_cli_unittest.cc
  49. navbar.md
  50. parse_seccomp_policy.cc
  51. platform2_preinstall.sh
  52. rust/
  53. scoped_minijail.h
  54. setup.py
  55. signal_handler.c
  56. signal_handler.h
  57. syscall_filter.c
  58. syscall_filter.h
  59. syscall_filter_unittest.cc
  60. syscall_filter_unittest_macros.h
  61. syscall_wrapper.c
  62. syscall_wrapper.h
  63. system.c
  64. system.h
  65. system_unittest.cc
  66. test/
  67. testrunner.cc
  68. tools/
  69. util.c
  70. util.h
  71. 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.

Additional tools

See the tools/README.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