search for: create_partition_boot_sector

...is also used by the installer itself. If you want to use a fixed SYSLINUX version you can use pre-patched files. I tried that and got "ldlinux.sys" running but it failed to load ldlinux.c32. I used "syslinux_mbr" in "create_mbr" and made the partition bootable. "create_partition_boot_sector" was modified to use "syslinux_bootsect" with Sect1Ptr0 = 0x80 and Sect1Ptr1 = 0. The value 0x80 was chosen because the plugin put the first file (ldlinux.sys) there. "ldlinux.sys" itself was pre-patched by the official installer. Therefore I created a compatible temporary...

I'm trying to add boot support to https://github.com/libguestfs/nbdkit/tree/master/plugins/floppy This NBD server plugin generates a completely virtual FAT filesystem and partition table. Nothing is ever written to a file, and it must run without anything needing to be root, loop mounting etc. Running "syslinux --install <something>" is a non-starter. So I've looked at

...stat *statbuf, size_t di, struct virtual_floppy *floppy); +static int visit_file (const char *dir, const char *name, const struct stat *statbuf, size_t di, struct virtual_floppy *floppy); +static int create_mbr (struct virtual_floppy *floppy); +static void chs_too_large (uint8_t *out); +static int create_partition_boot_sector (const char *label, struct virtual_floppy *floppy); +static int create_fsinfo (struct virtual_floppy *floppy); +static int create_fat (struct virtual_floppy *floppy); +static void write_fat_file (uint32_t first_cluster, uint32_t nr_clusters, struct virtual_floppy *floppy); +static int create_region...

Add nbdkit-floppy-plugin, “inspired” by qemu's VVFAT driver, but without the ability to handle writes. The implementation is pretty complete, supporting FAT32, LFNs, volume labels, timestamps, etc, and it passes both ‘make check’ and ‘make check-valgrind’. Usage is simple; to serve the current directory: $ nbdkit floppy . Then using guestfish (or any NBD client): $ guestfish --ro