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@ -318,34 +318,34 @@ Because of [vchan limitation](https://github.com/qubesos/qubes-issues/issues/951
## Dom0 tools implementation ## Dom0 tools implementation
* `/usr/lib/qubes/qrexec-daemon`: One instance is required for every active domain. Responsible for: * `/usr/lib/qubes/qrexec-daemon`: One instance is required for every active domain. Responsible for:
* Handling execution and service requests from **dom0** (source: `qrexec-client`). * Handling execution and service requests from **dom0** (source: `qrexec-client`).
* Handling service requests from the associated domain (source: `qrexec-client-vm`, then `qrexec-agent`). * Handling service requests from the associated domain (source: `qrexec-client-vm`, then `qrexec-agent`).
* Command line: `qrexec-daemon domain-id domain-name [default user]` * Command line: `qrexec-daemon domain-id domain-name [default user]`
* `domain-id`: Numeric Qubes ID assigned to the associated domain. * `domain-id`: Numeric Qubes ID assigned to the associated domain.
* `domain-name`: Associated domain name. * `domain-name`: Associated domain name.
* `default user`: Optional. If passed, `qrexec-daemon` uses this user as default for all execution requests that don't specify one. * `default user`: Optional. If passed, `qrexec-daemon` uses this user as default for all execution requests that don't specify one.
* `/usr/lib/qubes/qrexec-policy`: Internal program used to evaluate the RPC policy and deciding whether a RPC call should be allowed. * `/usr/lib/qubes/qrexec-policy`: Internal program used to evaluate the RPC policy and deciding whether a RPC call should be allowed.
* `/usr/lib/qubes/qrexec-client`: Used to pass execution and service requests to `qrexec-daemon`. Command line parameters: * `/usr/lib/qubes/qrexec-client`: Used to pass execution and service requests to `qrexec-daemon`. Command line parameters:
* `-d target-domain-name`: Specifies the target for the execution/service request. * `-d target-domain-name`: Specifies the target for the execution/service request.
* `-l local-program`: Optional. If present, `local-program` is executed and its stdout/stdin are used when sending/receiving data to/from the remote peer. * `-l local-program`: Optional. If present, `local-program` is executed and its stdout/stdin are used when sending/receiving data to/from the remote peer.
* `-e`: Optional. If present, stdout/stdin are not connected to the remote peer. Only process creation status code is received. * `-e`: Optional. If present, stdout/stdin are not connected to the remote peer. Only process creation status code is received.
* `-c <request-id,src-domain-name,src-domain-id>`: used for connecting a VM-VM service request by `qrexec-policy`. Details described below in the service example. * `-c <request-id,src-domain-name,src-domain-id>`: used for connecting a VM-VM service request by `qrexec-policy`. Details described below in the service example.
* `cmdline`: Command line to pass to `qrexec-daemon` as the execution/service request. Service request format is described below in the service example. * `cmdline`: Command line to pass to `qrexec-daemon` as the execution/service request. Service request format is described below in the service example.
**Note:** None of the above tools are designed to be used by users directly. **Note:** None of the above tools are designed to be used by users directly.
## VM tools implementation ## VM tools implementation
* `qrexec-agent`: One instance runs in each active domain. Responsible for: * `qrexec-agent`: One instance runs in each active domain. Responsible for:
* Handling service requests from `qrexec-client-vm` and passing them to connected `qrexec-daemon` in dom0. * Handling service requests from `qrexec-client-vm` and passing them to connected `qrexec-daemon` in dom0.
* Executing associated `qrexec-daemon` execution/service requests. * Executing associated `qrexec-daemon` execution/service requests.
* Command line parameters: none. * Command line parameters: none.
* `qrexec-client-vm`: Runs in an active domain. Used to pass service requests to `qrexec-agent`. * `qrexec-client-vm`: Runs in an active domain. Used to pass service requests to `qrexec-agent`.
* Command line: `qrexec-client-vm target-domain-name service-name local-program [local program arguments]` * Command line: `qrexec-client-vm target-domain-name service-name local-program [local program arguments]`
* `target-domain-name`: Target domain for the service request. Source is the current domain. * `target-domain-name`: Target domain for the service request. Source is the current domain.
* `service-name`: Requested service name. * `service-name`: Requested service name.
* `local-program`: `local-program` is executed locally and its stdin/stdout are connected to the remote service endpoint. * `local-program`: `local-program` is executed locally and its stdin/stdout are connected to the remote service endpoint.
## Qrexec protocol details ## Qrexec protocol details