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https://github.com/ilyakooo0/nixpkgs.git
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40a35299fa
it's really easy to accidentally write the wrong systemd Exec* directive, ones
that works most of the time but fails when users include systemd metacharacters
in arguments that are interpolated into an Exec* directive. add a few functions
analogous to escapeShellArg{,s} and some documentation on how and when to use them.
46 lines
1.6 KiB
Nix
46 lines
1.6 KiB
Nix
import ./make-test-python.nix ({ pkgs, ... }:
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let
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echoAll = pkgs.writeScript "echo-all" ''
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#! ${pkgs.runtimeShell}
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for s in "$@"; do
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printf '%s\n' "$s"
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done
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'';
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# deliberately using a local empty file instead of pkgs.emptyFile to have
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# a non-store path in the test
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args = [ "a%Nything" "lang=\${LANG}" ";" "/bin/sh -c date" ./empty-file 4.2 23 ];
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in
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{
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name = "systemd-escaping";
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machine = { pkgs, lib, utils, ... }: {
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systemd.services.echo =
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assert !(builtins.tryEval (utils.escapeSystemdExecArgs [ [] ])).success;
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assert !(builtins.tryEval (utils.escapeSystemdExecArgs [ {} ])).success;
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assert !(builtins.tryEval (utils.escapeSystemdExecArgs [ null ])).success;
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assert !(builtins.tryEval (utils.escapeSystemdExecArgs [ false ])).success;
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assert !(builtins.tryEval (utils.escapeSystemdExecArgs [ (_:_) ])).success;
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{ description = "Echo to the journal";
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serviceConfig.Type = "oneshot";
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serviceConfig.ExecStart = ''
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${echoAll} ${utils.escapeSystemdExecArgs args}
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'';
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};
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};
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testScript = ''
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machine.wait_for_unit("multi-user.target")
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machine.succeed("systemctl start echo.service")
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# skip the first 'Starting <service> ...' line
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logs = machine.succeed("journalctl -u echo.service -o cat").splitlines()[1:]
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assert "a%Nything" == logs[0]
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assert "lang=''${LANG}" == logs[1]
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assert ";" == logs[2]
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assert "/bin/sh -c date" == logs[3]
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assert "/nix/store/ij3gw72f4n5z4dz6nnzl1731p9kmjbwr-empty-file" == logs[4]
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assert "4.2" in logs[5] # toString produces extra fractional digits!
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assert "23" == logs[6]
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'';
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})
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