mirror of
https://github.com/wiiu-env/libromfs_wiiu.git
synced 2024-11-12 13:45:04 +01:00
852 lines
24 KiB
C
852 lines
24 KiB
C
#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/dirent.h>
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#include <sys/iosupport.h>
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#include <sys/param.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <malloc.h>
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#include <coreinit/cache.h>
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#include <coreinit/filesystem.h>
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#include "romfs_dev.h"
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typedef struct romfs_mount {
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devoptab_t device;
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bool setup;
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RomfsSource fd_type;
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int32_t id;
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int32_t fd;
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time_t mtime;
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uint64_t offset;
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romfs_header header;
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romfs_dir *cwd;
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uint32_t *dirHashTable, *fileHashTable;
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void *dirTable, *fileTable;
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char name[32];
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FSFileHandle cafe_fd;
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FSClient cafe_client;
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} romfs_mount;
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extern int __system_argc;
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extern char **__system_argv;
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//static char __thread __component[PATH_MAX+1];
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static char __component[PATH_MAX + 1];
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#define romFS_root(m) ((romfs_dir*)(m)->dirTable)
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#define romFS_none ((uint32_t)~0)
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#define romFS_dir_mode (S_IFDIR | S_IRUSR | S_IRGRP | S_IROTH)
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#define romFS_file_mode (S_IFREG | S_IRUSR | S_IRGRP | S_IROTH)
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static romfs_dir *romFS_dir(romfs_mount *mount, uint32_t off) {
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if (off + sizeof(romfs_dir) > mount->header.dirTableSize) { return NULL; }
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romfs_dir *curDir = ((romfs_dir * )((uint8_t *) mount->dirTable + off));
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if (off + sizeof(romfs_dir) + curDir->nameLen > mount->header.dirTableSize) { return NULL; }
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return curDir;
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}
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static romfs_file *romFS_file(romfs_mount *mount, uint32_t off) {
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if (off + sizeof(romfs_file) > mount->header.fileTableSize) { return NULL; }
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romfs_file *curFile = ((romfs_file * )((uint8_t *) mount->fileTable + off));
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if (off + sizeof(romfs_file) + curFile->nameLen > mount->header.fileTableSize) { return NULL; }
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return curFile;
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}
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static ssize_t _romfs_read(romfs_mount *mount, uint64_t offset, void *buffer, uint64_t size) {
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uint64_t pos = mount->offset + offset;
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size_t _read = 0;
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if (mount->fd_type == RomfsSource_FileDescriptor) {
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off_t seek_offset = lseek(mount->fd, pos, SEEK_SET);
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if (pos != seek_offset) {
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return -1;
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}
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_read = read(mount->fd, buffer, size);
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} else if (mount->fd_type == RomfsSource_FileDescriptor_CafeOS) {
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FSCmdBlock cmd;
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FSInitCmdBlock(&cmd);
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FSStatus result;
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if ((((uint32_t) buffer) & 0x3F) == 0) {
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result = FSReadFileWithPos(&mount->cafe_client, &cmd, (uint8_t *) buffer, 1, size, pos, mount->cafe_fd, 0, FS_ERROR_FLAG_ALL);
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} else {
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uint8_t *buffer_ = (uint8_t *) memalign(0x40, size);
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if (!buffer_) {
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return -1;
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}
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result = FSReadFileWithPos(&mount->cafe_client, &cmd, buffer_, 1, size, pos, mount->cafe_fd, 0, FS_ERROR_FLAG_ALL);
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memcpy(buffer, buffer_, size);
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free(buffer_);
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}
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if (result < 0) {
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return -1;
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}
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return (ssize_t) result;
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}
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return _read;
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}
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static bool _romfs_read_chk(romfs_mount *mount, uint64_t offset, void *buffer, uint64_t size) {
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return _romfs_read(mount, offset, buffer, size) == size;
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}
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//-----------------------------------------------------------------------------
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static int romfs_open(struct _reent *r, void *fileStruct, const char *path, int flags, int mode);
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static int romfs_close(struct _reent *r, void *fd);
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static ssize_t romfs_read(struct _reent *r, void *fd, char *ptr, size_t len);
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static off_t romfs_seek(struct _reent *r, void *fd, off_t pos, int dir);
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static int romfs_fstat(struct _reent *r, void *fd, struct stat *st);
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static int romfs_stat(struct _reent *r, const char *path, struct stat *st);
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static int romfs_chdir(struct _reent *r, const char *path);
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static DIR_ITER *romfs_diropen(struct _reent *r, DIR_ITER *dirState, const char *path);
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static int romfs_dirreset(struct _reent *r, DIR_ITER *dirState);
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static int romfs_dirnext(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *filestat);
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static int romfs_dirclose(struct _reent *r, DIR_ITER *dirState);
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typedef struct {
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romfs_mount *mount;
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romfs_file *file;
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uint64_t offset, pos;
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} romfs_fileobj;
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typedef struct {
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romfs_mount *mount;
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romfs_dir *dir;
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uint32_t state;
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uint32_t childDir;
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uint32_t childFile;
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} romfs_diriter;
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static const devoptab_t romFS_devoptab =
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{
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.structSize = sizeof(romfs_fileobj),
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.open_r = romfs_open,
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.close_r = romfs_close,
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.read_r = romfs_read,
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.seek_r = romfs_seek,
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.fstat_r = romfs_fstat,
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.stat_r = romfs_stat,
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.chdir_r = romfs_chdir,
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.dirStateSize = sizeof(romfs_diriter),
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.diropen_r = romfs_diropen,
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.dirreset_r = romfs_dirreset,
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.dirnext_r = romfs_dirnext,
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.dirclose_r = romfs_dirclose,
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// symlinks aren't supported so alias lstat to stat
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.lstat_r = romfs_stat,
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};
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static bool romfs_initialised = false;
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static romfs_mount romfs_mounts[32];
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//-----------------------------------------------------------------------------
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static int32_t romfsMountCommon(const char *name, romfs_mount *mount);
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static void romfsInitMtime(romfs_mount *mount);
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static void _romfsResetMount(romfs_mount *mount, int32_t id) {
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memset(mount, 0, sizeof(*mount));
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memcpy(&mount->device, &romFS_devoptab, sizeof(romFS_devoptab));
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mount->device.name = mount->name;
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mount->device.deviceData = mount;
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mount->id = id;
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DCFlushRange(mount, sizeof(*mount));
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}
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static void _romfsInit(void) {
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uint32_t i;
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uint32_t total = sizeof(romfs_mounts) / sizeof(romfs_mount);
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if (!romfs_initialised) {
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for (i = 0; i < total; i++) {
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_romfsResetMount(&romfs_mounts[i], i);
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}
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romfs_initialised = true;
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}
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}
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static romfs_mount *romfsFindMount(const char *name) {
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uint32_t i;
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uint32_t total = sizeof(romfs_mounts) / sizeof(romfs_mount);
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romfs_mount *mount = NULL;
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_romfsInit();
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for (i = 0; i < total; i++) {
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mount = &romfs_mounts[i];
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if (name == NULL) { //Find an unused mount entry.
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if (!mount->setup) {
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return mount;
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}
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} else if (mount->setup) { //Find the mount with the input name.
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if (strncmp(mount->name, name, sizeof(mount->name)) == 0) {
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return mount;
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}
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}
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}
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return NULL;
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}
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__attribute__((weak)) const char *__romfs_path = NULL;
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static romfs_mount *romfs_alloc(void) {
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return romfsFindMount(NULL);
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}
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static void romfs_free(romfs_mount *mount) {
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if (mount->fileTable) {
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free(mount->fileTable);
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}
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if (mount->fileHashTable) {
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free(mount->fileHashTable);
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}
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if (mount->dirTable) {
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free(mount->dirTable);
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}
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if (mount->dirHashTable) {
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free(mount->dirHashTable);
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}
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_romfsResetMount(mount, mount->id);
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}
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static void romfs_mountclose(romfs_mount *mount) {
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if (mount->fd_type == RomfsSource_FileDescriptor) {
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close(mount->fd);
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}
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if (mount->fd_type == RomfsSource_FileDescriptor_CafeOS) {
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FSCmdBlock cmd;
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FSInitCmdBlock(&cmd);
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FSCloseFile(&mount->cafe_client, &cmd, mount->cafe_fd, FS_ERROR_FLAG_ALL);
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mount->cafe_fd = 0;
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FSDelClient(&mount->cafe_client, 0);
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memset(&mount->cafe_client, 0, sizeof(FSClient));
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}
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romfs_free(mount);
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}
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int32_t romfsMount(const char *name, const char *filepath, RomfsSource source) {
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romfs_mount *mount = romfs_alloc();
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if (mount == NULL) {
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return 99;
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}
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// Regular RomFS
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mount->fd_type = source;
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if (mount->fd_type == RomfsSource_FileDescriptor) {
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mount->fd = open(filepath, 0);
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if (mount->fd == -1) {
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romfs_free(mount);
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return -1;
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}
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} else if (mount->fd_type == RomfsSource_FileDescriptor_CafeOS) {
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memset(&mount->cafe_client, 0, sizeof(FSClient));
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if (FSAddClient(&mount->cafe_client, FS_ERROR_FLAG_ALL) != FS_STATUS_OK) {
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romfs_free(mount);
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return -1;
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}
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FSCmdBlock cmd;
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FSInitCmdBlock(&cmd);
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FSStatus result = FSOpenFile(&mount->cafe_client, &cmd, filepath, "r", &mount->cafe_fd, FS_ERROR_FLAG_ALL);
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if (result != FS_STATUS_OK) {
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FSDelClient(&mount->cafe_client, FS_ERROR_FLAG_ALL);
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romfs_free(mount);
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return -1;
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}
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}
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return romfsMountCommon(name, mount);
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}
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int32_t romfsMountCommon(const char *name, romfs_mount *mount) {
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memset(mount->name, 0, sizeof(mount->name));
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strncpy(mount->name, name, sizeof(mount->name) - 1);
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romfsInitMtime(mount);
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if (_romfs_read(mount, 0, &mount->header, sizeof(mount->header)) != sizeof(mount->header)) {
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goto fail_io;
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}
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if (mount->header.headerSize != 0x50) {
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goto fail_io;
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}
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mount->dirHashTable = NULL;
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mount->dirTable = NULL;
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mount->fileHashTable = NULL;
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mount->fileTable = NULL;
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mount->dirHashTable = (uint32_t *) memalign(0x40, mount->header.dirHashTableSize);
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if (!mount->dirHashTable) {
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goto fail_oom;
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}
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if (!_romfs_read_chk(mount, mount->header.dirHashTableOff, mount->dirHashTable, mount->header.dirHashTableSize)) {
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goto fail_io;
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}
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mount->dirTable = memalign(0x40, mount->header.dirTableSize);
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if (!mount->dirTable) {
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goto fail_oom;
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}
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if (!_romfs_read_chk(mount, mount->header.dirTableOff, mount->dirTable, mount->header.dirTableSize)) {
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goto fail_io;
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}
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mount->fileHashTable = (uint32_t *) memalign(0x40, mount->header.fileHashTableSize);
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if (!mount->fileHashTable) {
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goto fail_oom;
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}
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if (!_romfs_read_chk(mount, mount->header.fileHashTableOff, mount->fileHashTable, mount->header.fileHashTableSize)) {
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goto fail_io;
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}
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mount->fileTable = memalign(0x40, mount->header.fileTableSize);
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if (!mount->fileTable) {
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goto fail_oom;
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}
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if (!_romfs_read_chk(mount, mount->header.fileTableOff, mount->fileTable, mount->header.fileTableSize)) {
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goto fail_io;
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}
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mount->cwd = romFS_root(mount);
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if (AddDevice(&mount->device) < 0) {
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goto fail_oom;
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}
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mount->setup = true;
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DCFlushRange(mount, sizeof(*mount));
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return 0;
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fail_oom:
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romfs_mountclose(mount);
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return 9;
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fail_io:
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romfs_mountclose(mount);
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return 10;
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}
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static void romfsInitMtime(romfs_mount *mount) {
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mount->mtime = time(NULL);
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}
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int32_t romfsUnmount(const char *name) {
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romfs_mount *mount;
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char tmpname[34];
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mount = romfsFindMount(name);
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if (mount == NULL) {
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return -1;
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}
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// Remove device
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memset(tmpname, 0, sizeof(tmpname));
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strncpy(tmpname, mount->name, sizeof(tmpname) - 2);
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strncat(tmpname, ":", sizeof(tmpname) - strlen(tmpname) - 1);
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RemoveDevice(tmpname);
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romfs_mountclose(mount);
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return 0;
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}
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//-----------------------------------------------------------------------------
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static uint32_t calcHash(uint32_t parent, const uint8_t *name, uint32_t namelen, uint32_t total) {
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uint32_t hash = parent ^123456789;
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uint32_t i;
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for (i = 0; i < namelen; i++) {
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hash = (hash >> 5) | (hash << 27);
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hash ^= name[i];
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}
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return hash % total;
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}
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static int searchForDir(romfs_mount *mount, romfs_dir *parent, const uint8_t *name, uint32_t namelen, romfs_dir **out) {
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uint64_t parentOff = (uintptr_t) parent - (uintptr_t) mount->dirTable;
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uint32_t hash = calcHash(parentOff, name, namelen, mount->header.dirHashTableSize / 4);
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romfs_dir *curDir = NULL;
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uint32_t curOff;
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*out = NULL;
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for (curOff = mount->dirHashTable[hash]; curOff != romFS_none; curOff = curDir->nextHash) {
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curDir = romFS_dir(mount, curOff);
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if (curDir == NULL) { return EFAULT; }
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if (curDir->parent != parentOff) {
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continue;
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}
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if (curDir->nameLen != namelen) {
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continue;
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}
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if (memcmp(curDir->name, name, namelen) != 0) {
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continue;
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}
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*out = curDir;
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return 0;
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}
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return ENOENT;
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}
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static int searchForFile(romfs_mount *mount, romfs_dir *parent, const uint8_t *name, uint32_t namelen, romfs_file **out) {
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uint64_t parentOff = (uintptr_t) parent - (uintptr_t) mount->dirTable;
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uint32_t hash = calcHash(parentOff, name, namelen, mount->header.fileHashTableSize / 4);
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romfs_file *curFile = NULL;
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uint32_t curOff;
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*out = NULL;
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for (curOff = mount->fileHashTable[hash]; curOff != romFS_none;
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curOff = curFile->nextHash) {
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curFile = romFS_file(mount, curOff);
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if (curFile == NULL) {
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return EFAULT;
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}
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if (curFile->parent != parentOff) {
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continue;
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}
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if (curFile->nameLen != namelen) {
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continue;
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}
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if (memcmp(curFile->name, name, namelen) != 0) {
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continue;
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}
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*out = curFile;
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return 0;
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}
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return ENOENT;
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}
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static int navigateToDir(romfs_mount *mount, romfs_dir **ppDir, const char **pPath, bool isDir) {
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char *colonPos = strchr(*pPath, ':');
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if (colonPos) { *pPath = colonPos + 1; }
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if (!**pPath) {
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return EILSEQ;
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}
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*ppDir = mount->cwd;
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if (**pPath == '/') {
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*ppDir = romFS_root(mount);
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(*pPath)++;
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}
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while (**pPath) {
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char *slashPos = strchr(*pPath, '/');
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char *component = __component;
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if (slashPos) {
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uint32_t len = slashPos - *pPath;
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if (!len) {
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return EILSEQ;
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}
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if (len > PATH_MAX) {
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return ENAMETOOLONG;
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}
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memcpy(component, *pPath, len);
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component[len] = 0;
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*pPath = slashPos + 1;
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} else if (isDir) {
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component = (char *) *pPath;
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*pPath += strlen(component);
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} else {
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return 0;
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}
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if (component[0] == '.') {
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if (!component[1]) { continue; }
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if (component[1] == '.' && !component[2]) {
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*ppDir = romFS_dir(mount, (*ppDir)->parent);
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if (!*ppDir) {
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return EFAULT;
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}
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continue;
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}
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}
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int ret = searchForDir(mount, *ppDir, (uint8_t *) component, strlen(component), ppDir);
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if (ret != 0) {
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return ret;
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}
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}
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return 0;
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}
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static ino_t dir_inode(romfs_mount *mount, romfs_dir *dir) {
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return (uint32_t *) dir - (uint32_t *) mount->dirTable;
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}
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static off_t dir_size(romfs_dir *dir) {
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return sizeof(romfs_dir) + (dir->nameLen + 3) / 4;
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}
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static nlink_t dir_nlink(romfs_mount *mount, romfs_dir *dir) {
|
|
nlink_t count = 2; // one for self, one for parent
|
|
uint32_t offset = dir->childDir;
|
|
|
|
while (offset != romFS_none) {
|
|
romfs_dir *tmp = romFS_dir(mount, offset);
|
|
if (!tmp) { break; }
|
|
++count;
|
|
offset = tmp->sibling;
|
|
}
|
|
|
|
offset = dir->childFile;
|
|
while (offset != romFS_none) {
|
|
romfs_file *tmp = romFS_file(mount, offset);
|
|
if (!tmp) { break; }
|
|
++count;
|
|
offset = tmp->sibling;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static ino_t file_inode(romfs_mount *mount, romfs_file *file) {
|
|
return ((uint32_t *) file - (uint32_t *) mount->fileTable) + mount->header.dirTableSize / 4;
|
|
}
|
|
|
|
int romfsGetFileInfoPerPath(const char *romfs, const char *path, romfs_fileInfo *out) {
|
|
if (out == NULL) {
|
|
return -1;
|
|
}
|
|
romfs_mount *mount = (romfs_mount *) romfsFindMount(romfs);
|
|
if (mount == NULL) {
|
|
return -2;
|
|
}
|
|
romfs_dir *curDir = NULL;
|
|
int errno2 = navigateToDir(mount, &curDir, &path, false);
|
|
if (errno2 != 0) {
|
|
return -3;
|
|
}
|
|
romfs_file *file = NULL;
|
|
int err = searchForFile(mount, curDir, (uint8_t *) path, strlen(path), &file);
|
|
if (err != 0) {
|
|
return -4;
|
|
}
|
|
|
|
out->length = file->dataSize;
|
|
out->offset = mount->header.fileDataOff + file->dataOff;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
int romfs_open(struct _reent *r, void *fileStruct, const char *path, int flags, int mode) {
|
|
romfs_fileobj *fileobj = (romfs_fileobj *) fileStruct;
|
|
|
|
fileobj->mount = (romfs_mount *) r->deviceData;
|
|
|
|
if ((flags & O_ACCMODE) != O_RDONLY) {
|
|
r->_errno = EROFS;
|
|
return -1;
|
|
}
|
|
|
|
romfs_dir *curDir = NULL;
|
|
r->_errno = navigateToDir(fileobj->mount, &curDir, &path, false);
|
|
if (r->_errno != 0) {
|
|
return -1;
|
|
}
|
|
|
|
romfs_file *file = NULL;
|
|
int ret = searchForFile(fileobj->mount, curDir, (uint8_t *) path, strlen(path), &file);
|
|
if (ret != 0) {
|
|
if (ret == ENOENT && (flags & O_CREAT)) {
|
|
r->_errno = EROFS;
|
|
} else {
|
|
r->_errno = ret;
|
|
}
|
|
return -1;
|
|
} else if ((flags & O_CREAT) && (flags & O_EXCL)) {
|
|
r->_errno = EEXIST;
|
|
return -1;
|
|
}
|
|
|
|
fileobj->file = file;
|
|
fileobj->offset = fileobj->mount->header.fileDataOff + file->dataOff;
|
|
fileobj->pos = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int romfs_close(struct _reent *r, void *fd) {
|
|
return 0;
|
|
}
|
|
|
|
ssize_t romfs_read(struct _reent *r, void *fd, char *ptr, size_t len) {
|
|
romfs_fileobj *file = (romfs_fileobj *) fd;
|
|
uint64_t endPos = file->pos + len;
|
|
|
|
/* check if past end-of-file */
|
|
if (file->pos >= file->file->dataSize) {
|
|
return 0;
|
|
}
|
|
|
|
/* truncate the read to end-of-file */
|
|
if (endPos > file->file->dataSize) {
|
|
endPos = file->file->dataSize;
|
|
}
|
|
len = endPos - file->pos;
|
|
|
|
ssize_t adv = _romfs_read(file->mount, file->offset + file->pos, ptr, len);
|
|
if (adv >= 0) {
|
|
file->pos += adv;
|
|
return adv;
|
|
}
|
|
|
|
r->_errno = EIO;
|
|
return -1;
|
|
}
|
|
|
|
off_t romfs_seek(struct _reent *r, void *fd, off_t pos, int dir) {
|
|
romfs_fileobj *file = (romfs_fileobj *) fd;
|
|
off_t start;
|
|
switch (dir) {
|
|
case SEEK_SET:
|
|
start = 0;
|
|
break;
|
|
|
|
case SEEK_CUR:
|
|
start = file->pos;
|
|
break;
|
|
|
|
case SEEK_END:
|
|
start = file->file->dataSize;
|
|
break;
|
|
|
|
default:
|
|
r->_errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
/* don't allow negative position */
|
|
if (pos < 0) {
|
|
if (start + pos < 0) {
|
|
r->_errno = EINVAL;
|
|
return -1;
|
|
}
|
|
}
|
|
/* check for overflow */
|
|
else if (INT64_MAX - pos < start) {
|
|
r->_errno = EOVERFLOW;
|
|
return -1;
|
|
}
|
|
|
|
file->pos = start + pos;
|
|
return file->pos;
|
|
}
|
|
|
|
static void fillDir(struct stat *st, romfs_mount *mount, romfs_dir *dir) {
|
|
memset(st, 0, sizeof(*st));
|
|
st->st_ino = dir_inode(mount, dir);
|
|
st->st_mode = romFS_dir_mode;
|
|
st->st_nlink = dir_nlink(mount, dir);
|
|
st->st_size = dir_size(dir);
|
|
st->st_blksize = 512;
|
|
st->st_blocks = (st->st_blksize + 511) / 512;
|
|
st->st_atime = st->st_mtime = st->st_ctime = mount->mtime;
|
|
}
|
|
|
|
static void fillFile(struct stat *st, romfs_mount *mount, romfs_file *file) {
|
|
memset(st, 0, sizeof(struct stat));
|
|
st->st_ino = file_inode(mount, file);
|
|
st->st_mode = romFS_file_mode;
|
|
st->st_nlink = 1;
|
|
st->st_size = (off_t) file->dataSize;
|
|
st->st_blksize = 512;
|
|
st->st_blocks = (st->st_blksize + 511) / 512;
|
|
st->st_atime = st->st_mtime = st->st_ctime = mount->mtime;
|
|
}
|
|
|
|
int romfs_fstat(struct _reent *r, void *fd, struct stat *st) {
|
|
romfs_fileobj *fileobj = (romfs_fileobj *) fd;
|
|
fillFile(st, fileobj->mount, fileobj->file);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int romfs_stat(struct _reent *r, const char *path, struct stat *st) {
|
|
romfs_mount *mount = (romfs_mount *) r->deviceData;
|
|
romfs_dir *curDir = NULL;
|
|
r->_errno = navigateToDir(mount, &curDir, &path, false);
|
|
if (r->_errno != 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (!*path) {
|
|
fillDir(st, mount, curDir);
|
|
return 0;
|
|
}
|
|
|
|
romfs_dir *dir = NULL;
|
|
int ret = 0;
|
|
ret = searchForDir(mount, curDir, (uint8_t *) path, strlen(path), &dir);
|
|
if (ret != 0 && ret != ENOENT) {
|
|
r->_errno = ret;
|
|
return -1;
|
|
}
|
|
if (ret == 0) {
|
|
fillDir(st, mount, dir);
|
|
|
|
return 0;
|
|
}
|
|
|
|
romfs_file *file = NULL;
|
|
ret = searchForFile(mount, curDir, (uint8_t *) path, strlen(path), &file);
|
|
if (ret != 0 && ret != ENOENT) {
|
|
r->_errno = ret;
|
|
return -1;
|
|
}
|
|
if (ret == 0) {
|
|
fillFile(st, mount, file);
|
|
return 0;
|
|
}
|
|
|
|
r->_errno = ENOENT;
|
|
return -1;
|
|
}
|
|
|
|
int romfs_chdir(struct _reent *r, const char *path) {
|
|
romfs_mount *mount = (romfs_mount *) r->deviceData;
|
|
romfs_dir *curDir = NULL;
|
|
r->_errno = navigateToDir(mount, &curDir, &path, true);
|
|
if (r->_errno != 0) {
|
|
return -1;
|
|
}
|
|
|
|
mount->cwd = curDir;
|
|
return 0;
|
|
}
|
|
|
|
DIR_ITER *romfs_diropen(struct _reent *r, DIR_ITER *dirState, const char *path) {
|
|
romfs_diriter *iter = (romfs_diriter *) (dirState->dirStruct);
|
|
romfs_dir *curDir = NULL;
|
|
iter->mount = (romfs_mount *) r->deviceData;
|
|
|
|
r->_errno = navigateToDir(iter->mount, &curDir, &path, true);
|
|
if (r->_errno != 0) {
|
|
return NULL;
|
|
}
|
|
|
|
iter->dir = curDir;
|
|
iter->state = 0;
|
|
iter->childDir = curDir->childDir;
|
|
iter->childFile = curDir->childFile;
|
|
|
|
return dirState;
|
|
}
|
|
|
|
int romfs_dirreset(struct _reent *r, DIR_ITER *dirState) {
|
|
romfs_diriter *iter = (romfs_diriter *) (dirState->dirStruct);
|
|
|
|
iter->state = 0;
|
|
iter->childDir = iter->dir->childDir;
|
|
iter->childFile = iter->dir->childFile;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int romfs_dirnext(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *filestat) {
|
|
romfs_diriter *iter = (romfs_diriter *) (dirState->dirStruct);
|
|
|
|
if (iter->state == 0) {
|
|
/* '.' entry */
|
|
memset(filestat, 0, sizeof(*filestat));
|
|
filestat->st_ino = dir_inode(iter->mount, iter->dir);
|
|
filestat->st_mode = romFS_dir_mode;
|
|
|
|
strcpy(filename, ".");
|
|
iter->state = 1;
|
|
return 0;
|
|
} else if (iter->state == 1) {
|
|
/* '..' entry */
|
|
romfs_dir *dir = romFS_dir(iter->mount, iter->dir->parent);
|
|
if (!dir) {
|
|
r->_errno = EFAULT;
|
|
return -1;
|
|
}
|
|
|
|
memset(filestat, 0, sizeof(*filestat));
|
|
filestat->st_ino = dir_inode(iter->mount, dir);
|
|
filestat->st_mode = romFS_dir_mode;
|
|
|
|
strcpy(filename, "..");
|
|
iter->state = 2;
|
|
return 0;
|
|
}
|
|
|
|
if (iter->childDir != romFS_none) {
|
|
romfs_dir *dir = romFS_dir(iter->mount, iter->childDir);
|
|
if (!dir) {
|
|
r->_errno = EFAULT;
|
|
return -1;
|
|
}
|
|
|
|
iter->childDir = dir->sibling;
|
|
|
|
memset(filestat, 0, sizeof(*filestat));
|
|
filestat->st_ino = dir_inode(iter->mount, dir);
|
|
filestat->st_mode = romFS_dir_mode;
|
|
|
|
memset(filename, 0, NAME_MAX);
|
|
|
|
if (dir->nameLen >= NAME_MAX) {
|
|
r->_errno = ENAMETOOLONG;
|
|
return -1;
|
|
}
|
|
|
|
strncpy(filename, (char *) dir->name, dir->nameLen);
|
|
|
|
return 0;
|
|
} else if (iter->childFile != romFS_none) {
|
|
romfs_file *file = romFS_file(iter->mount, iter->childFile);
|
|
if (!file) {
|
|
r->_errno = EFAULT;
|
|
return -1;
|
|
}
|
|
|
|
iter->childFile = file->sibling;
|
|
|
|
memset(filestat, 0, sizeof(*filestat));
|
|
filestat->st_ino = file_inode(iter->mount, file);
|
|
filestat->st_mode = romFS_file_mode;
|
|
|
|
memset(filename, 0, NAME_MAX);
|
|
|
|
if (file->nameLen >= NAME_MAX) {
|
|
r->_errno = ENAMETOOLONG;
|
|
return -1;
|
|
}
|
|
|
|
strncpy(filename, (char *) file->name, file->nameLen);
|
|
|
|
return 0;
|
|
}
|
|
|
|
r->_errno = ENOENT;
|
|
return -1;
|
|
}
|
|
|
|
int romfs_dirclose(struct _reent *r, DIR_ITER *dirState) {
|
|
return 0;
|
|
} |