June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Creating filesystem images with device tables
We saw earlier in the section Creating a boot initramfs that the kernel has an option to create initramfs using a device table. Device tables are really useful because they allow a non-root user to create device nodes and to allocate arbitrary UID and GID values to any file or directory. The same concept has been applied to tools that create other filesystem image formats, as shown in this table:
| Filesystem format | Tool |
| jffs2 | mkfs.jffs2 |
| ubifs | mkfs.ubifs |
| ext2 | genext2fs |
We will look at jffs2 and ubifs in Chapter 7, Creating a Storage Strategy, when we look at filesystems for flash memory. The third, ext2, is a format commonly used for managed flash memory, including SD cards. The example ...
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