static int
open_maybe_packaged(BootVolume& volume, const char* path, int openMode)
{
if (strncmp(path, kSystemDirectoryPrefix, strlen(kSystemDirectoryPrefix))
== 0) {
path += strlen(kSystemDirectoryPrefix);
return open_from(volume.SystemDirectory(), path, openMode);
}
return open_from(volume.RootDirectory(), path, openMode);
}
status_t
load_driver_settings(stage2_args* /*args*/, Directory* volume)
{
int fd = open_from(volume, "home/config/settings/kernel/drivers", O_RDONLY);
if (fd < B_OK)
return fd;
Directory* settings = (Directory*)get_node_from(fd);
if (settings == NULL)
return B_ENTRY_NOT_FOUND;
void* cookie;
if (settings->Open(&cookie, O_RDONLY) == B_OK) {
char name[B_FILE_NAME_LENGTH];
while (settings->GetNextEntry(cookie, name, sizeof(name)) == B_OK) {
if (!strcmp(name, ".") || !strcmp(name, ".."))
continue;
status_t status = load_driver_settings_file(settings, name);
if (status != B_OK)
dprintf("Could not load \"%s\" error %ld\n", name, status);
}
settings->Close(cookie);
}
return B_OK;
}
Node *
Directory::Lookup(const char *name, bool traverseLinks)
{
off_t id;
if (fTree.Find((uint8 *)name, strlen(name), &id) < B_OK)
return NULL;
Node *node = Stream::NodeFactory(fStream.GetVolume(), id);
if (!node)
return NULL;
if (S_ISLNK(node->Type())) {
// the node is a symbolic link, so we have to resolve the path
char linkPath[B_PATH_NAME_LENGTH];
((Link *)node)->ReadLink(linkPath, sizeof(linkPath));
delete node;
// we don't need this one anymore
int fd = open_from(this, linkPath, O_RDONLY);
if (fd >= 0) {
node = get_node_from(fd);
if (node != NULL)
node->Acquire();
close(fd);
return node;
}
return NULL;
}
return node;
}
static status_t
load_modules_from(Directory *volume, const char *path)
{
// we don't have readdir() & co. (yet?)...
int fd = open_from(volume, path, O_RDONLY);
if (fd < B_OK)
return fd;
Directory *modules = (Directory *)get_node_from(fd);
if (modules == NULL)
return B_ENTRY_NOT_FOUND;
void *cookie;
if (modules->Open(&cookie, O_RDONLY) == B_OK) {
char name[B_FILE_NAME_LENGTH];
while (modules->GetNextEntry(cookie, name, sizeof(name)) == B_OK) {
if (!strcmp(name, ".") || !strcmp(name, ".."))
continue;
status_t status = elf_load_image(modules, name);
if (status != B_OK)
dprintf("Could not load \"%s\" error %ld\n", name, status);
}
modules->Close(cookie);
}
return B_OK;
}
::Node*
TarFS::Directory::Lookup(const char* name, bool traverseLinks)
{
TarFS::Entry* entry = LookupEntry(name);
if (!entry)
return NULL;
Node* node = entry->ToNode();
if (traverseLinks) {
if (S_ISLNK(node->Type())) {
Symlink* symlink = static_cast<Symlink*>(node);
int fd = open_from(this, symlink->LinkPath(), O_RDONLY);
if (fd >= 0) {
node = get_node_from(fd);
close(fd);
}
}
}
if (node)
node->Acquire();
return node;
}
status_t
load_kernel(stage2_args *args, Directory *volume)
{
int fd = open_from(volume, KERNEL_PATH, O_RDONLY);
if (fd < B_OK)
return fd;
dprintf("load kernel...\n");
elf_init();
status_t status = elf_load_image(fd, &gKernelArgs.kernel_image);
close(fd);
if (status < B_OK) {
dprintf("loading kernel failed: %lx!\n", status);
return status;
}
status = elf_relocate_image(&gKernelArgs.kernel_image);
if (status < B_OK) {
dprintf("relocating kernel failed: %lx!\n", status);
return status;
}
gKernelArgs.kernel_image.name = kernel_args_strdup(KERNEL_IMAGE);
return B_OK;
}
static status_t
load_module(Directory *volume, const char *name)
{
char moduleName[B_FILE_NAME_LENGTH];
if (strlcpy(moduleName, name, sizeof(moduleName)) > sizeof(moduleName))
return B_NAME_TOO_LONG;
for (int32 i = 0; sAddonPaths[i]; i++) {
// get base path
int baseFD = open_from(volume, sAddonPaths[i], O_RDONLY);
if (baseFD < B_OK)
continue;
Directory *base = (Directory *)get_node_from(baseFD);
if (base == NULL) {
close(baseFD);
continue;
}
while (true) {
int fd = open_from(base, moduleName, O_RDONLY);
if (fd >= B_OK) {
struct stat stat;
if (fstat(fd, &stat) != 0 || !S_ISREG(stat.st_mode))
return B_BAD_VALUE;
status_t status = elf_load_image(base, moduleName);
close(fd);
close(baseFD);
return status;
}
// cut off last name element (or stop trying if there are no more)
char *last = strrchr(moduleName, '/');
if (last != NULL)
last[0] = '\0';
else
break;
}
close(baseFD);
}
return B_OK;
}
static status_t
save_previous_syslog_to_volume(Directory* directory)
{
// find an unused name
char name[16];
bool found = false;
for (int i = 0; i < 99; i++) {
snprintf(name, sizeof(name), "SYSLOG%02d.TXT", i);
Node* node = directory->Lookup(name, false);
if (node == NULL) {
found = true;
break;
}
node->Release();
}
if (!found) {
printf("Failed to find an unused name for the syslog file!\n");
return B_ERROR;
}
printf("Writing syslog to file \"%s\" ...\n", name);
int fd = open_from(directory, name, O_RDWR | O_CREAT | O_EXCL, 0644);
if (fd < 0) {
printf("Failed to create syslog file!\n");
return fd;
}
ring_buffer* syslogBuffer
= (ring_buffer*)gKernelArgs.debug_output.Pointer();
iovec vecs[2];
int32 vecCount = ring_buffer_get_vecs(syslogBuffer, vecs);
if (vecCount > 0) {
size_t toWrite = ring_buffer_readable(syslogBuffer);
ssize_t written = writev(fd, vecs, vecCount);
if (written < 0 || (size_t)written != toWrite) {
printf("Failed to write to the syslog file \"%s\"!\n", name);
close(fd);
return errno;
}
}
close(fd);
printf("Successfully wrote syslog file.\n");
return B_OK;
}
static int
find_kernel(Directory *volume, const char **name = NULL)
{
for (int32 i = 0; sKernelPaths[i][0] != NULL; i++) {
int fd = open_from(volume, sKernelPaths[i][0], O_RDONLY);
if (fd >= 0) {
if (name)
*name = sKernelPaths[i][1];
return fd;
}
}
return B_ENTRY_NOT_FOUND;
}
bool
is_bootable(Directory *volume)
{
if (volume->IsEmpty())
return false;
// check for the existance of a kernel (for our platform)
int fd = open_from(volume, KERNEL_PATH, O_RDONLY);
if (fd < B_OK)
return false;
close(fd);
return true;
}
status_t
elf_load_image(Directory *directory, const char *path)
{
preloaded_image *image;
TRACE(("elf_load_image(directory = %p, \"%s\")\n", directory, path));
int fd = open_from(directory, path, O_RDONLY);
if (fd < 0)
return fd;
// check if this file has already been loaded
struct stat stat;
if (fstat(fd, &stat) < 0)
return errno;
image = gKernelArgs.preloaded_images;
for (; image != NULL; image = image->next) {
if (image->inode == stat.st_ino) {
// file has already been loaded, no need to load it twice!
close(fd);
return B_OK;
}
}
// we still need to load it, so do it
image = (preloaded_image *)kernel_args_malloc(sizeof(preloaded_image));
if (image == NULL) {
close(fd);
return B_NO_MEMORY;
}
status_t status = elf_load_image(fd, image);
if (status == B_OK) {
image->name = kernel_args_strdup(path);
image->inode = stat.st_ino;
// insert to kernel args
image->next = gKernelArgs.preloaded_images;
gKernelArgs.preloaded_images = image;
} else
kernel_args_free(image);
close(fd);
return status;
}
/*static*/ PackageSettingsItem*
PackageSettingsItem::Load(::Directory* systemDirectory, const char* name)
{
// open the driver settings file
const char* settingsFilePath
= kSystemSettingsDirectory "/packages" + strlen(kSystemDirectory) + 1;
int fd = open_from(systemDirectory, settingsFilePath, B_READ_ONLY, 0);
if (fd < 0)
return NULL;
FileDescriptorCloser fdCloser(fd);
// load the driver settings
void* settingsHandle = load_driver_settings_file(fd);
if (settingsHandle == NULL)
return NULL;
CObjectDeleter<void, status_t> settingsDeleter(settingsHandle,
&unload_driver_settings);
const driver_settings* settings = get_driver_settings(settingsHandle);
for (int i = 0; i < settings->parameter_count; i++) {
const driver_parameter& parameter = settings->parameters[i];
if (strcmp(parameter.name, "Package") != 0
|| parameter.value_count < 1
|| strcmp(parameter.values[0], name) != 0) {
continue;
}
PackageSettingsItem* settingsItem
= new(std::nothrow) PackageSettingsItem;
if (settingsItem == NULL || settingsItem->Init(parameter) != B_OK) {
delete settingsItem;
return NULL;
}
return settingsItem;
}
return NULL;
}
static status_t
load_driver_settings_file(Directory* directory, const char* name)
{
int fd = open_from(directory, name, O_RDONLY);
if (fd < 0)
return fd;
struct stat stat;
if (fstat(fd, &stat) < 0)
return errno;
char* buffer = (char*)kernel_args_malloc(stat.st_size + 1);
if (buffer == NULL)
return B_NO_MEMORY;
if (read(fd, buffer, stat.st_size) != stat.st_size)
return B_IO_ERROR;
driver_settings_file* file = (driver_settings_file*)kernel_args_malloc(
sizeof(driver_settings_file));
if (file == NULL) {
kernel_args_free(buffer);
return B_NO_MEMORY;
}
buffer[stat.st_size] = '\0';
// null terminate the buffer
strlcpy(file->name, name, sizeof(file->name));
file->buffer = buffer;
file->size = stat.st_size;
// add it to the list
file->next = gKernelArgs.driver_settings;
gKernelArgs.driver_settings = file;
return B_OK;
}