/*! Gets the boot device, scans all of its partitions, gets the boot partition, and mounts its file system. \param args The stage 2 arguments. \param _bootVolume On success set to the boot volume. \return \c B_OK on success, another error code otherwise. */ status_t get_boot_file_system(stage2_args* args, BootVolume& _bootVolume) { status_t error = platform_add_boot_device(args, &gBootDevices); if (error != B_OK) return error; NodeIterator iterator = gBootDevices.GetIterator(); while (iterator.HasNext()) { Node *device = iterator.Next(); error = add_partitions_for(device, false, true); if (error != B_OK) continue; NodeList bootPartitions; error = platform_get_boot_partitions(args, device, &gPartitions, &bootPartitions); if (error != B_OK) continue; NodeIterator partitionIterator = bootPartitions.GetIterator(); while (partitionIterator.HasNext()) { Partition *partition = (Partition*)partitionIterator.Next(); Directory *fileSystem; error = partition->Mount(&fileSystem, true); if (error != B_OK) { // this partition doesn't contain any known file system; we // don't need it anymore gPartitions.Remove(partition); delete partition; continue; } // init the BootVolume error = _bootVolume.SetTo(fileSystem); if (error != B_OK) continue; sBootDevice = device; return B_OK; } } return B_ERROR; }
bool is_bootable(Directory *volume) { if (volume->IsEmpty()) return false; BootVolume bootVolume; if (bootVolume.SetTo(volume) != B_OK) return false; // check for the existance of a kernel (for our platform) int fd = find_kernel(bootVolume); if (fd < 0) return false; close(fd); return true; }
/*! Gets the boot device, scans all of its partitions, gets the boot partition, and mounts its file system. \param args The stage 2 arguments. \param _bootVolume On success set to the boot volume. \return \c B_OK on success, another error code otherwise. */ status_t get_boot_file_system(stage2_args* args, BootVolume& _bootVolume) { Node *device; status_t error = platform_add_boot_device(args, &gBootDevices); if (error != B_OK) return error; // the boot device must be the first device in the list device = gBootDevices.First(); error = add_partitions_for(device, false, true); if (error != B_OK) return error; Partition *partition; error = platform_get_boot_partition(args, device, &gPartitions, &partition); if (error != B_OK) return error; Directory *fileSystem; error = partition->Mount(&fileSystem, true); if (error != B_OK) { // this partition doesn't contain any known file system; we // don't need it anymore gPartitions.Remove(partition); delete partition; return error; } // init the BootVolume error = _bootVolume.SetTo(fileSystem); if (error != B_OK) return error; sBootDevice = device; return B_OK; }