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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2016-02-25 08:32:51 -0800 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2016-03-30 14:12:22 -0700 |
| commit | 4af75df6a410ce76d9f60f27b07e5645ecc2c5ed (patch) | |
| tree | d6d9b91265b5ded69629015c5ca1013ef91642cf /Documentation/binfmt_misc.txt | |
| parent | 948b701a607f123df92ed29084413e5dd8cda2ed (diff) | |
| download | lwn-4af75df6a410ce76d9f60f27b07e5645ecc2c5ed.tar.gz lwn-4af75df6a410ce76d9f60f27b07e5645ecc2c5ed.zip | |
binfmt_misc: add F option description to documentation
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'Documentation/binfmt_misc.txt')
| -rw-r--r-- | Documentation/binfmt_misc.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/binfmt_misc.txt b/Documentation/binfmt_misc.txt index 6b1de7058371..ec83bbce547a 100644 --- a/Documentation/binfmt_misc.txt +++ b/Documentation/binfmt_misc.txt @@ -66,6 +66,13 @@ Here is what the fields mean: This feature should be used with care as the interpreter will run with root permissions when a setuid binary owned by root is run with binfmt_misc. + 'F' - fix binary. The usual behaviour of binfmt_misc is to spawn the + binary lazily when the misc format file is invoked. However, + this doesn't work very well in the face of mount namespaces and + changeroots, so the F mode opens the binary as soon as the + emulation is installed and uses the opened image to spawn the + emulator, meaning it is always available once installed, + regardless of how the environment changes. There are some restrictions: |