读取Linux内核参数
有没有办法在启动时找到传递给内核（/proc/cmdline）的参数，而无需读取proc中的任何文件？我可能有一个进程需要在挂载 /proc 之前读取启动参数。
Is there a way to find the parameters passes to the kernel (/proc/cmdline) at boot time without reading any files in proc? I might have a process that needs to read the boot parameters before /proc is mounted.
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似乎内核将引导行上的任何内容作为参数传递给 init - 除非有 ' = ' 或 ' 。 '
将 Linux 启动选项传递给 Init
It seems the kernel passes anything on the boot line as a arg to init- unless there is a ' = ' or a ' . '
Passing Linux boot opts to Init
我确信有更好的方法，但我确实在 dmesg 中看到了它
I'm sure there's a better way, but I do see it in dmesg
我想更好地了解您的要求，因为几乎可以保证您已经安装了
/proc。挂载/proc是init所做的第一件事。Ubuntu 与新贵：
/etc/init/mountall.conf，startup事件的一部分带 initscripts 的 Fedora：
/etc/rc.sysinit，它所做的第二件事（设置主机名之后）您的代码几乎肯定会在此之后运行。
当您替换
init时，请看一下init是如何做到的。 初始化 git 存储库。似乎有一个名为
boot_command_line的全局符号。I'd like to understand your requirements better, because you are pretty much guaranteed to have
/procmounted. Mounting/procis one of the very first things thatinitdoes.Ubuntu with upstart:
/etc/init/mountall.conf, part of thestartupeventFedora with initscripts:
/etc/rc.sysinit, second thing it does (after setting the hostname)Your code is almost certain to run after this.
Seeing as you're replacing
init, take a look at howinitdoes it. init git repo.There seems to be a global symbol called
boot_command_line.