8441ff6886
Otherwise we might be checking results of such calls before they even finish, causing nasty races like: ``` [ 15.656530] testsuite-43.sh[303]: + su testuser -s /bin/sh -c 'XDG_RUNTIME_DIR=/run/user/$UID exec "$@"' -- sh systemd-run --user --unit=test-unprotected-home -P touch /home/testuser/works.txt ... [ 15.757744] testsuite-43.sh[324]: Running as unit: test-unprotected-home.service [ 15.775611] systemd[296]: Started /usr/bin/touch /home/testuser/works.txt. [ 15.783597] testsuite-43.sh[303]: + test -e /home/testuser/works.txt [ 15.787542] systemd[296]: test-unprotected-home.service: Succeeded. ... [ 15.787684] systemd[1]: Received SIGCHLD from PID 303 (bash). [ 15.787790] systemd[1]: Child 303 (bash) died (code=exited, status=1/FAILURE) [ 15.787881] systemd[1]: testsuite-43.service: Child 303 belongs to testsuite-43.service. [ 15.788040] systemd[1]: testsuite-43.service: Main process exited, code=exited, status=1/FAILURE [ 15.788224] systemd[1]: testsuite-43.service: Failed with result 'exit-code'. [ 15.788333] systemd[1]: testsuite-43.service: Service will not restart (restart setting) [ 15.788421] systemd[1]: testsuite-43.service: Changed start -> failed [ 15.788790] systemd[1]: testsuite-43.service: Job 160 testsuite-43.service/start finished, result=failed [ 15.788995] systemd[1]: Failed to start testsuite-43.service. ```
69 lines
2.2 KiB
Bash
Executable file
69 lines
2.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -ex
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set -o pipefail
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systemd-analyze log-level debug
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runas() {
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declare userid=$1
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shift
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su "$userid" -s /bin/sh -c 'XDG_RUNTIME_DIR=/run/user/$UID exec "$@"' -- sh "$@"
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}
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runas testuser systemd-run --wait --user --unit=test-private-users \
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-p PrivateUsers=yes -P echo hello
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runas testuser systemd-run --wait --user --unit=test-private-tmp-innerfile \
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-p PrivateUsers=yes -p PrivateTmp=yes \
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-P touch /tmp/innerfile.txt
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# File should not exist outside the job's tmp directory.
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test ! -e /tmp/innerfile.txt
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touch /tmp/outerfile.txt
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# File should not appear in unit's private tmp.
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runas testuser systemd-run --wait --user --unit=test-private-tmp-outerfile \
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-p PrivateUsers=yes -p PrivateTmp=yes \
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-P test ! -e /tmp/outerfile.txt
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# Confirm that creating a file in home works
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runas testuser systemd-run --wait --user --unit=test-unprotected-home \
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-P touch /home/testuser/works.txt
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test -e /home/testuser/works.txt
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# Confirm that creating a file in home is blocked under read-only
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runas testuser systemd-run --wait --user --unit=test-protect-home-read-only \
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-p PrivateUsers=yes -p ProtectHome=read-only \
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-P bash -c '
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test -e /home/testuser/works.txt
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! touch /home/testuser/blocked.txt
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'
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test ! -e /home/testuser/blocked.txt
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# Check that tmpfs hides the whole directory
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runas testuser systemd-run --wait --user --unit=test-protect-home-tmpfs \
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-p PrivateUsers=yes -p ProtectHome=tmpfs \
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-P test ! -e /home/testuser
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# Confirm that home, /root, and /run/user are inaccessible under "yes"
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runas testuser systemd-run --wait --user --unit=test-protect-home-yes \
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-p PrivateUsers=yes -p ProtectHome=yes \
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-P bash -c '
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test "$(stat -c %a /home)" = "0"
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test "$(stat -c %a /root)" = "0"
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test "$(stat -c %a /run/user)" = "0"
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'
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# Confirm we cannot change groups because we only have one mapping in the user
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# namespace (no CAP_SETGID in the parent namespace to write the additional
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# mapping of the user supplied group and thus cannot change groups to an
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# unmapped group ID)
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! runas testuser systemd-run --wait --user --unit=test-group-fail \
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-p PrivateUsers=yes -p Group=daemon \
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-P true
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systemd-analyze log-level info
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echo OK > /testok
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exit 0
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