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48 lines
1.1 KiB
Bash
Executable File
48 lines
1.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -eu -o pipefail
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set -x
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source common.sh
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# Avoid store dir being inside sandbox build-dir
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unset NIX_STORE_DIR
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unset NIX_STATE_DIR
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setupStoreDirs
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initLowerStore
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mountOverlayfs
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buildInStore () {
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nix-build --store "$1" ../hermetic.nix --arg busybox "$busybox" --arg seed 1 --no-out-link
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}
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triggerStaleFileHandle () {
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# Arrange it so there are duplicate paths
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nix-store --store "$storeA" --gc # Clear lower store
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buildInStore "$storeB" # Build into upper layer first
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buildInStore "$storeA" # Then build in lower store
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# Duplicate paths mean GC will have to delete via upper layer
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nix-store --store "$storeB" --gc
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# Clear lower store again to force building in upper layer
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nix-store --store "$storeA" --gc
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# Now attempting to build in upper layer will fail
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buildInStore "$storeB"
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}
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# Without remounting, we should encounter errors
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expectStderr 1 triggerStaleFileHandle | grepQuiet 'Stale file handle'
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# Configure remount-hook and reset OverlayFS
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storeB="$storeB&remount-hook=$PWD/remount.sh"
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remountOverlayfs
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# Now it should succeed
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triggerStaleFileHandle
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