I threw this together as a quick hack to put my System 6.0.1 floppies onto a CD-ROM, since I couldn't figure out how to get mkisofs to create an HFS CD-ROM with multiple partitons. This program creates an Apple-format partition table with the specified number of ProDOS and/or HFS partitions. Each partition has its own volume name and size in blocks. If the first partition is a ProDOS partition and has a file named PRODOS, the CD will be bootable on a suitably-equipped Apple II.

Floppy images can be created with GSHK or ShrinkIt and expanded into files with NuLib. To create images of hard-disk partitions, make sure your Linux kernel includes CONFIG_MAC_PARTITION and whatever support is needed to access your hard drive (probably CONFIG_SCSI, CONFIG_BLK_DEV_SD, and the appropriate SCSI low-level driver), move the drive from your II to your Linux box, and dd the appropriate /dev/sdwhatever into a file.

Once you've created the partition table, you just cat the generated partition table and the filesystem images together in the order they were specified when the table was generated.

Read ptbl.c for documentation (build instructions and usage).