June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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What should be in the root filesystem?
The kernel will get a root filesystem, either an initramfs, passed as a pointer from the bootloader, or by mounting the block device given on the kernel command line by the root= parameter. Once it has a root filesystem, the kernel will execute the first program, by default named init, as described in the section Early user space in Chapter 4, Configuring and Building the Kernel. Then, as far as the kernel is concerned, its job is complete. It is up to the init program to begin starting other programs and so bring the system to life.
To make a minimal root filesystem, you need these components:
- init: This is the program that starts everything off, usually by running a series of scripts. I will describe ...
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