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systemd-bsod.service

摘要

systemd-bsod.service 用于在启动过程中发生严重故障时显示全屏蓝屏信息，其中包含故障相关日志和可扫描的二维码，帮助用户获取进一步排障信息。文档列出了 systemd-bsod 可执行程序的参数，包括显示帮助、显示版本、持续监听日志中的紧急消息（--continuous，v255 引入）以及指定输出终端（--tty，v256 引入）。返回码约定为成功显示日志时返回 0，否则返回非零错误码。

荐读理由

systemd-bsod 能在 boot 失败时直接在 VT 终端全屏展示系统日志、包括可扫码的应急信息，独立开发者可在产品中集成此功能直接提供用户实时故障引导

原文

Index· Directivessystemd 257.13

Name

systemd-bsod.service, systemd-bsod — Displays boot-time emergency log message in full screen

Synopsis

systemd-bsod.service

/usr/lib/systemd/systemd-bsod [OPTIONS...]

Description¶

systemd-bsod.service is used to display a blue screen which contains a message relating to a boot failure, including a QR code which can be scanned to get helpful information about the failure.

Options¶

The following options are understood by systemd-bsod:

-h, --help¶

Print a short help text and exit.

--version¶

Print a short version string and exit.

-c, --continuous¶

When specified, systemd-bsod waits continuously for changes in the journal if it does not find any emergency messages on the initial attempt.

Added in version 255.

--tty=*``*¶

Specify the TTY to output to. By default, systemd-bsod will automatically find a free VT to display the message on. If this option is specified a TTY may be selected explicitly. Use --tty=/dev/tty to direct output to the terminal the command is invoked on.

Added in version 256.

Exit status¶

On success (displaying the journal message successfully), 0 is returned, a non-zero failure code otherwise.