FwupdPlugin – 1.0: Environment Variables
Description: Reference for FwupdPlugin-1.0: Environment Variables

When running fwupd reads some variables from your environment and changes some behavior. This might be useful for debugging, or to make fwupd run somewhere with a non-standard filesystem layout.

## fwupdmgr and fwupdtool

- `DISABLE_SSL_STRICT` disables strict SSL certificate checking, which may make downloading files work when using some antisocial corporate firewalls.
- `FWUPD_CURL_VERBOSE` shows more information when downloading files
- `FWUPD_DEVICE_TESTS_BASE_URI` sets the base URI when downloading firmware for the device-tests
- `FWUPD_SUPPORTED` overrides the `-Dsupported_build` meson option at runtime
- `FWUPD_VERBOSE` is set when running `--verbose`
- `FWUPD_BACKEND_VERBOSE` can be used to show detailed plugin and backend debugging
- `FWUPD_XMLB_VERBOSE` can be set to show Xmlb silo regeneration and quirk matches
- `FWUPD_DBUS_SOCKET` is used to set the socket filename if running without a dbus-daemon
- `FWUPD_DOWNLOAD_VERBOSE` can be used to show wget or curl output
- `FWUPD_PROFILE` can be used to set the profile traceback threshold value in ms
- `FWUPD_FUZZER_RUNNING` if the firmware format is being fuzzed
- standard glibc variables like `LANG` are also honored for CLI tools that are translated
- libcurl respects the session proxy, e.g. `http_proxy`, `all_proxy`, `sftp_proxy` and `no_proxy`

## daemon

- `FWUPD_MACHINE_KIND` can be used to override the detected machine type, e.g. `physical`, `virtual`, or `container`
- `FWUPD_HOST_EMULATE` can be used to load test data from `/usr/share/fwupd/host-emulate.d`, e.g. `thinkpad-p1-no-iommu.json.gz`

## Self Tests

- `CI_NETWORK` if CI is running with network access
- `TPM_SERVER_RUNNING` if an emulated TPM is running

## Shared libfwupdplugin

- `FU_HID_DEVICE_VERBOSE` shows HID traffic
- `FU_SREC_FIRMWARE_VERBOSE` shows more information about parsing Motorola S-record files
- `FU_IHEX_FIRMWARE_VERBOSE` shows more information about parsing Intel hex files
- `FU_UDEV_DEVICE_DEBUG` shows more information about UDEV devices, including parents
- `FU_USB_DEVICE_DEBUG` shows more information about USB devices
- `FU_MEI_DEVICE_DEBUG` shows MEI reads and writes
- `FWUPD_DEVICE_LIST_VERBOSE` display devices being added and removed from the list
- `FWUPD_PROBE_VERBOSE` dump the detected devices to the console, even if not supported by fwupd
- `FWUPD_BIOS_SETTING_VERBOSE` be verbose while parsing BIOS settings
- `FWUPD_EFI_SIGNATURE_VERBOSE` be verbose while parsing EFI signatures

## Plugins

Most plugins read a plugin-specific runtime key to increase verbosity more than the usual `VERBOSE`. This can be also used when using fwupdtool e.g. using `--plugin-verbose=dell` will set the environment variable of `FWUPD_DELL_VERBOSE` automatically.

Other variables, include:

- `FWUPD_DELL_FAKE_SMBIOS` if set, use fake SMBIOS information for tests
- `FWUPD_FORCE_TPM2` ignores a TPM 1.2 device detected in the TPM self tests
- `FWUPD_PLUGIN_TEST` used by the test plugin to pass data out-of-band to the loader
- `FWUPD_REDFISH_SELF_TEST` if set, do destructive tests on the actual device BMC
- `FWUPD_REDFISH_SMBIOS_DATA` use this filename to emulate a specific SMBIOS blob
- `FWUPD_SOLOKEY_EMULATE` emulates a fake device for testing
- `FWUPD_SUPERIO_DISABLE_MIRROR` disables the e-flash fixup to get byte-accurate hardware dumps
- `FWUPD_SUPERIO_RECOVER` allow recovery of a corrupted SuperIO by hardcoding the device size
- `FWUPD_TEST_PLUGIN_XML` used by the test plugin to load XML state out-of-band before startup
- `FWUPD_UEFI_CAPSULE_RECREATE_COD_DATA` if set, write the files in the example COD tree in srcdir
- `FWUPD_UEFI_TEST` used by the UEFI plugins to disable specific sanity checks during self tests
- `FWUPD_WAC_EMULATE` emulates a fake device for testing

## File system overrides

These are not fully documented here, see https://github.com/fwupd/fwupd/blob/main/libfwupdplugin/fu-common.c for details.

- `CACHE_DIRECTORY`
- `CONFIGURATION_DIRECTORY`
- `FWUPD_ACPITABLESDIR`
- `FWUPD_DATADIR`
- `FWUPD_DATADIR_QUIRKS`
- `FWUPD_EFIAPPDIR`
- `FWUPD_FIRMWARESEARCH`
- `FWUPD_LIBDIR_PKG`
- `FWUPD_LOCALSTATEDIR`
- `FWUPD_LOCALSTATEDIR_QUIRKS`
- `FWUPD_OFFLINE_TRIGGER`
- `FWUPD_PROCFS`
- `FWUPD_SYSCONFDIR`
- `FWUPD_SYSFSDRIVERDIR`
- `FWUPD_SYSFSFWATTRIBDIR`
- `FWUPD_SYSFSFWDIR`
- `FWUPD_SYSFSSECURITYDIR`
- `FWUPD_SYSFSTPMDIR`
- `FWUPD_UEFI_ESP_PATH`
- `HOME`
- `RUNTIME_DIRECTORY`
- `SNAP`
- `SNAP_USER_DATA`
- `STATE_DIRECTORY`