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# GNU Guix --- Functional package management for GNU
# Copyright © 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
# Copyright © 2020 Eric Bavier <bavier@posteo.net>
#
# This file is part of GNU Guix.
#
# GNU Guix is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or (at
# your option) any later version.
#
# GNU Guix is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
#
# Test the 'guix pack --relocatable' using the external store, if any.
#
guix pack --version
# 'guix pack --relocatable' requires a C compiler and libc.a, which our
# bootstrap binaries don't provide. To make the test relatively inexpensive,
# run it on the user's global store if possible, on the grounds that binaries
# may already be there or can be built or downloaded inexpensively.
storedir="`guile -c '(use-modules (guix config))(display %storedir)'`"
localstatedir="`guile -c '(use-modules (guix config))(display %localstatedir)'`"
NIX_STORE_DIR="$storedir"
GUIX_DAEMON_SOCKET="$localstatedir/guix/daemon-socket/socket"
export NIX_STORE_DIR GUIX_DAEMON_SOCKET
if ! guile -c '(use-modules (guix)) (exit (false-if-exception (open-connection)))'
then
exit 77
fi
# Attempt to run the given command in a namespace where the store is
# invisible. This makes sure the presence of the store does not hide
# problems.
run_without_store ()
{
if unshare -r true # Are user namespaces supported?
then
# Run that relocatable executable in a user namespace where we "erase"
# the store by mounting an empty file system on top of it. That way,
# we exercise the wrapper code that creates the user namespace and
# bind-mounts the store.
unshare -mrf sh -c 'mount -t tmpfs -o ro none "$NIX_STORE_DIR"; '"$*"
else
# Run the relocatable program in the current namespaces. This is a
# weak test because we're going to access store items from the host
# store.
$*
fi
}
# Wait for the given file to show up. Error out if it doesn't show up in a
# timely fashion.
wait_for_file ()
{
i=0
while ! test -f "$1" && test $i -lt 20
do
sleep 0.3
i=`expr $i + 1`
done
test -f "$1"
}
test_directory="`mktemp -d`"
export test_directory
trap 'chmod -Rf +w "$test_directory"; rm -rf "$test_directory"' EXIT
if unshare -r true
then
# Test the 'userns' execution engine.
tarball="`guix pack -R -S /Bin=bin sed`"
(cd "$test_directory"; tar xvf "$tarball")
run_without_store "$test_directory/Bin/sed" --version > "$test_directory/output"
grep 'GNU sed' "$test_directory/output"
# Same with an explicit engine.
run_without_store GUIX_EXECUTION_ENGINE="userns" \
"$test_directory/Bin/sed" --version > "$test_directory/output"
grep 'GNU sed' "$test_directory/output"
# Check whether the exit code is preserved.
! run_without_store "$test_directory/Bin/sed" --does-not-exist
chmod -Rf +w "$test_directory"; rm -rf "$test_directory"/*
else
echo "'userns' execution tests skipped" >&2
fi
case "`uname -m`" in
x86_64|i?86)
# Try '-RR' and PRoot.
tarball="`guix pack -RR -S /Bin=bin sed`"
tar tvf "$tarball" | grep /bin/proot
(cd "$test_directory"; tar xf "$tarball")
run_without_store GUIX_EXECUTION_ENGINE="proot" \
"$test_directory/Bin/sed" --version > "$test_directory/output"
grep 'GNU sed' "$test_directory/output"
# Now with fakechroot.
run_without_store GUIX_EXECUTION_ENGINE="fakechroot" \
"$test_directory/Bin/sed" --version > "$test_directory/output"
grep 'GNU sed' "$test_directory/output"
unset GUIX_EXECUTION_ENGINE
chmod -Rf +w "$test_directory"; rm -rf "$test_directory"/*
if unshare -r true
then
# Check whether the store contains everything it should. Check
# once when erasing $STORE_PARENT ("/gnu") and once when erasing
# $NIX_STORE_DIR ("/gnu/store").
tarball="`guix pack -RR -S /bin=bin bash-minimal`"
(cd "$test_directory"; tar xf "$tarball")
STORE_PARENT="`dirname $NIX_STORE_DIR`"
export STORE_PARENT
for engine in userns proot fakechroot
do
for i in $(guix gc -R $(guix build bash-minimal | grep -v -e '-doc$'))
do
unshare -mrf sh -c "mount -t tmpfs none \"$NIX_STORE_DIR\"; GUIX_EXECUTION_ENGINE=$engine $test_directory/bin/sh -c 'echo $NIX_STORE_DIR/*'" | grep $(basename $i)
unshare -mrf sh -c "mount -t tmpfs none \"$STORE_PARENT\"; GUIX_EXECUTION_ENGINE=$engine $test_directory/bin/sh -c 'echo $NIX_STORE_DIR/*'" | grep $(basename $i)
done
done
chmod -Rf +w "$test_directory"; rm -rf "$test_directory"/*
fi
;;
*)
echo "skipping PRoot and Fakechroot tests" >&2
;;
esac
if unshare -r true
then
# Check what happens if the wrapped binary forks and leaves child
# processes behind, like a daemon. The root file system should remain
# available to those child processes. See <https://bugs.gnu.org/44261>.
cat > "$test_directory/manifest.scm" <<EOF
(use-modules (guix))
(define daemon
(program-file "daemon"
#~(begin
(use-modules (ice-9 match)
(ice-9 ftw))
(call-with-output-file "parent-store"
(lambda (port)
(write (scandir (ungexp (%store-prefix)))
port)))
(match (primitive-fork)
(0 (sigaction SIGHUP (const #t))
(call-with-output-file "pid"
(lambda (port)
(display (getpid) port)))
(pause)
(call-with-output-file "child-store"
(lambda (port)
(write (scandir (ungexp (%store-prefix)))
port))))
(_ #t)))))
(define package
(computed-file "package"
#~(let ((out (ungexp output)))
(mkdir out)
(mkdir (string-append out "/bin"))
(symlink (ungexp daemon)
(string-append out "/bin/daemon")))))
(manifest (list (manifest-entry
(name "daemon")
(version "0")
(item package))))
EOF
tarball="$(guix pack -S /bin=bin -R -m "$test_directory/manifest.scm")"
(cd "$test_directory"; tar xf "$tarball")
# Run '/bin/daemon', which forks, then wait for the child, send it SIGHUP
# so that it dumps its view of the store, and make sure the child and
# parent both see the same store contents.
(cd "$test_directory"; run_without_store ./bin/daemon)
wait_for_file "$test_directory/pid"
kill -HUP $(cat "$test_directory/pid")
wait_for_file "$test_directory/child-store"
diff -u "$test_directory/parent-store" "$test_directory/child-store"
chmod -Rf +w "$test_directory"; rm -rf "$test_directory"/*
fi
# Ensure '-R' works with outputs other than "out".
tarball="`guix pack -R -S /share=share groff:doc`"
(cd "$test_directory"; tar xf "$tarball")
test -d "$test_directory/share/doc/groff/html"
chmod -Rf +w "$test_directory"; rm -rf "$test_directory"/*
# Ensure '-R' applies to propagated inputs. Failing to do that, it would fail
# with a profile collision error in this case because 'python-scipy'
# propagates 'python-numpy'. See <https://bugs.gnu.org/42510>.
guix pack -RR python-numpy python-scipy --no-grafts -n
# Check that packages that mix executable and support files (e.g. git) in the
# "binary" directories still work after wrapped.
cat >"$test_directory/manifest.scm" <<'EOF'
(use-modules (guix) (guix profiles) (guix search-paths)
(gnu packages bootstrap))
(manifest
(list (manifest-entry
(name "test") (version "0")
(item (file-union "test"
`(("bin/hello"
,(program-file
"hello"
#~(begin
(add-to-load-path (getenv "HELLO_EXEC_PATH"))
(display (load-from-path "msg"))(newline))
#:guile %bootstrap-guile))
("libexec/hello/msg"
,(plain-file "msg" "42")))))
(search-paths
(list (search-path-specification
(variable "HELLO_EXEC_PATH")
(files '("libexec/hello"))
(separator #f)))))))
EOF
tarball="`guix pack -RR -S /opt= -m $test_directory/manifest.scm`"
(cd "$test_directory"; tar xvf "$tarball")
( export GUIX_PROFILE=$test_directory/opt
. $GUIX_PROFILE/etc/profile
run_without_store "$test_directory/opt/bin/hello" > "$test_directory/output" )
cat "$test_directory/output"
test "`cat $test_directory/output`" = "42"
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