Return MINIJAIL_ERR_MOUNT instead of crashing if mount_one fails

BUG=chromium:1075892
TEST=Run Minijail unit tests

Change-Id: Ia289ed3aa6d6d784c9b63b22f314742a11231ade
2 files changed
tree: 52499e0eb2a6d3eaac83231e956caf2c68f564aa
  1. .clang-format
  2. .github/
  3. .gitignore
  4. Android.bp
  5. CPPLINT.cfg
  6. Cargo.toml
  7. CleanSpec.mk
  8. HACKING.md
  9. LICENSE
  10. METADATA
  11. MODULE_LICENSE_BSD
  12. Makefile
  13. NOTICE
  14. OWNERS
  15. OWNERS.rust
  16. PRESUBMIT.cfg
  17. PREUPLOAD.cfg
  18. README.md
  19. RELEASE.md
  20. TEST_MAPPING
  21. arch.h
  22. bpf.c
  23. bpf.h
  24. build.rs
  25. common.mk
  26. dump_constants.cc
  27. elfparse.c
  28. elfparse.h
  29. examples/
  30. gen_constants-inl.h
  31. gen_constants.c
  32. gen_constants.sh
  33. gen_syscalls.c
  34. gen_syscalls.sh
  35. get_googletest.sh
  36. lib.rs
  37. libconstants.h
  38. libminijail-private.h
  39. libminijail.c
  40. libminijail.h
  41. libminijail.pc.in
  42. libminijail.rs
  43. libminijail_unittest.cc
  44. libminijailpreload.c
  45. libsyscalls.h
  46. linux-x86/
  47. minijail0.1
  48. minijail0.5
  49. minijail0.c
  50. minijail0_cli.c
  51. minijail0_cli.h
  52. minijail0_cli_unittest.cc
  53. navbar.md
  54. parse_seccomp_policy.cc
  55. platform2_preinstall.sh
  56. scoped_minijail.h
  57. setup.py
  58. signal_handler.c
  59. signal_handler.h
  60. syscall_filter.c
  61. syscall_filter.h
  62. syscall_filter_unittest.cc
  63. syscall_filter_unittest_macros.h
  64. syscall_wrapper.c
  65. syscall_wrapper.h
  66. system.c
  67. system.h
  68. system_unittest.cc
  69. test/
  70. testrunner.cc
  71. tools/
  72. util.c
  73. util.h
  74. 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