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Show which PID is causing a temp root

Browse source 
Example:

  error: Cannot delete path '/nix/store/klyng5rpdkwi5kbxkncy4gjwb490dlhb-foo.drv' because it's in use by Nix process '{nix-process:3605324}'.
This commit is contained in:
Eelco Dolstra 2025-06-27 16:50:48 +02:00
parent cae732f7a1
commit 31b00218fe
6 changed files with 35 additions and 20 deletions
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1
tests/functional/gc-runtime.nix
View file

@ -9,6 +9,7 @@ mkDerivation {
cat > $out/program <<EOF
#! ${shell}
echo x > \$TEST_ROOT/fifo
sleep 10000
EOF

9
tests/functional/gc-runtime.sh
View file

@ -21,11 +21,16 @@ nix-env -p "$profiles/test" -f ./gc-runtime.nix -i gc-runtime
outPath=$(nix-env -p "$profiles/test" -q --no-name --out-path gc-runtime)
echo "$outPath"
fifo="$TEST_ROOT/fifo"
mkfifo "$fifo"
echo "backgrounding program..."
"$profiles"/test/program &
sleep 2 # hack - wait for the program to get started
"$profiles"/test/program "$fifo" &
child=$!
echo PID=$child
cat "$fifo"
expectStderr 1 nix-store --delete "$outPath" | grepQuiet "Cannot delete path.*because it's referenced by the GC root '/proc/"
nix-env -p "$profiles/test" -e gc-runtime
nix-env -p "$profiles/test" --delete-generations old

4
tests/functional/gc.sh
View file

@ -23,10 +23,10 @@ if nix-store --gc --print-dead | grep -E "$outPath"$; then false; fi
nix-store --gc --print-dead
inUse=$(readLink "$outPath/reference-to-input-2")
if nix-store --delete "$inUse"; then false; fi
expectStderr 1 nix-store --delete "$inUse" | grepQuiet "Cannot delete path.*because it's referenced by the GC root "
test -e "$inUse"
if nix-store --delete "$outPath"; then false; fi
expectStderr 1 nix-store --delete "$outPath" | grepQuiet "Cannot delete path.*because it's referenced by the GC root "
test -e "$outPath"
for i in "$NIX_STORE_DIR"/*; do

10
tests/functional/local-overlay-store/delete-refs-inner.sh
View file

@ -22,14 +22,14 @@ input2=$(nix-build ../hermetic.nix --no-out-link --arg busybox "$busybox" --arg
input3=$(nix-build ../hermetic.nix --no-out-link --arg busybox "$busybox" --arg withFinalRefs true --arg seed 2 -A passthru.input3 -j0)
# Can't delete because referenced
expectStderr 1 nix-store --delete $input1 | grepQuiet "Cannot delete path"
expectStderr 1 nix-store --delete $input2 | grepQuiet "Cannot delete path"
expectStderr 1 nix-store --delete $input3 | grepQuiet "Cannot delete path"
expectStderr 1 nix-store --delete $input1 | grepQuiet "Cannot delete path.*because it's referenced by path"
expectStderr 1 nix-store --delete $input2 | grepQuiet "Cannot delete path.*because it's referenced by path"
expectStderr 1 nix-store --delete $input3 | grepQuiet "Cannot delete path.*because it's referenced by path"
# These same paths are referenced in the lower layer (by the seed 1
# build done in `initLowerStore`).
expectStderr 1 nix-store --store "$storeA" --delete $input2 | grepQuiet "Cannot delete path"
expectStderr 1 nix-store --store "$storeA" --delete $input3 | grepQuiet "Cannot delete path"
expectStderr 1 nix-store --store "$storeA" --delete $input2 | grepQuiet "Cannot delete path.*because it's referenced by path"
expectStderr 1 nix-store --store "$storeA" --delete $input3 | grepQuiet "Cannot delete path.*because it's referenced by path"
# Can delete
nix-store --delete $hermetic