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@@ -66,6 +66,13 @@ Here is what the fields mean:
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This feature should be used with care as the interpreter
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will run with root permissions when a setuid binary owned by root
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is run with binfmt_misc.
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+ 'F' - fix binary. The usual behaviour of binfmt_misc is to spawn the
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+ binary lazily when the misc format file is invoked. However,
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+ this doesn't work very well in the face of mount namespaces and
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+ changeroots, so the F mode opens the binary as soon as the
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+ emulation is installed and uses the opened image to spawn the
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+ emulator, meaning it is always available once installed,
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+ regardless of how the environment changes.
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There are some restrictions:
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James Bottomley