Usage example for existing partition image + second partition contents

[swltr]

Maybe I'm missing something, but it's not clear to me how to use genimage in cases in which the image file for one partition is given and the image for a second partition should be created by genimage. In my case, I have an image file (rootfs.ext2) containing the ext3 file system for / (generated by Buildroot), and a directory containing the files that should go into /home in a separate partition.

From the documentation and examples I have read so far, I imagine it should look similar to this:

image compactflash.img {
  hdimage {
  }

  partition root {
    partition-type = 0x83
    bootable = true
    # An existing image of the partition's file system.
    image = "rootfs.ext2"
  }

  partition home {
    partition-type = 0x83
    image = "home.ext3"
    size = 1500M
  }
}

image home.ext3 {
  ext3 {
    label = "home"
  }

  name = "home"
  size = 1500M
  mountpoint = "/home"
}

Is this the proper way to do it? I understand mountpoint is relative to the configured rootpath. Where does genimage expect the file rootfs.ext2, though?

[michaelolbrich]

You don't need to specify the partition size if it is the same as the image size. And the mountpoint is only needed if $rootpath/$mountpoint actually contains something.

Existing input images are located in the configured inputpath or use an absolute path for the filename.