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Merge pull request #11300 from noamraph/homeless-shelter-to-proc

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Make $HOME=/proc/homeless-shelter instead of /homeless-shelter
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tomberek 2024-08-19 23:26:41 -04:00 committed by GitHub
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2 changed files with 9 additions and 1 deletions
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3
doc/manual/src/language/derivations.md
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@ -264,7 +264,8 @@ The [`builder`](#attr-builder) is executed as follows:
- `PATH` is set to `/path-not-set` to prevent shells from - `PATH` is set to `/path-not-set` to prevent shells from
initialising it to their built-in default value. initialising it to their built-in default value.
- `HOME` is set to `/homeless-shelter` to prevent programs from - `HOME` is set to `/proc/homeless-shelter` on Linux and `/homeless-shelter`
on OSX, to prevent programs from
using `/etc/passwd` or the like to find the user's home using `/etc/passwd` or the like to find the user's home
directory, which could cause impurity. Usually, when `HOME` is directory, which could cause impurity. Usually, when `HOME` is
set, it is used as the location of the home directory, even if set, it is used as the location of the home directory, even if

7
src/libstore/unix/build/local-derivation-goal.cc
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@ -102,7 +102,14 @@ void handleDiffHook(
} }
} }
// We want $HOME to be un-creatable in the sandbox. On Linux,
// you can't create anything inside /proc since it's a virtual filesystem.
// On Darwin it seems that `/homeless-shelter` is good enough.
#if __linux__
const Path LocalDerivationGoal::homeDir = "/proc/homeless-shelter";
#else
const Path LocalDerivationGoal::homeDir = "/homeless-shelter"; const Path LocalDerivationGoal::homeDir = "/homeless-shelter";
#endif
LocalDerivationGoal::~LocalDerivationGoal() LocalDerivationGoal::~LocalDerivationGoal()