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b7ec5341b9
libctru/libctru/source/sdmc_dev.c
mtheall b7ec5341b9 Add UTF-8 <-> UTF-16 support.
2015-01-16 11:44:05 -06:00

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#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <sys/dirent.h>
#include <sys/iosupport.h>
#include <sys/param.h>
#include <unistd.h>
#include <3ds/types.h>
#include <3ds/sdmc.h>
#include <3ds/services/fs.h>
#include <3ds/util/utf.h>
/*! @internal
*
* @file sdmc_dev.c
*
* SDMC Device
*/
static int sdmc_translate_error(Result error);
static int sdmc_open(struct _reent *r, void *fileStruct, const char *path, int flags, int mode);
static int sdmc_close(struct _reent *r, int fd);
static ssize_t sdmc_write(struct _reent *r, int fd, const char *ptr, size_t len);
static ssize_t sdmc_read(struct _reent *r, int fd, char *ptr, size_t len);
static off_t sdmc_seek(struct _reent *r, int fd, off_t pos, int dir);
static int sdmc_fstat(struct _reent *r, int fd, struct stat *st);
static int sdmc_stat(struct _reent *r, const char *file, struct stat *st);
static int sdmc_link(struct _reent *r, const char *existing, const char *newLink);
static int sdmc_unlink(struct _reent *r, const char *name);
static int sdmc_chdir(struct _reent *r, const char *name);
static int sdmc_rename(struct _reent *r, const char *oldName, const char *newName);
static int sdmc_mkdir(struct _reent *r, const char *path, int mode);
static DIR_ITER* sdmc_diropen(struct _reent *r, DIR_ITER *dirState, const char *path);
static int sdmc_dirreset(struct _reent *r, DIR_ITER *dirState);
static int sdmc_dirnext(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *filestat);
static int sdmc_dirclose(struct _reent *r, DIR_ITER *dirState);
static int sdmc_statvfs(struct _reent *r, const char *path, struct statvfs *buf);
static int sdmc_ftruncate(struct _reent *r, int fd, off_t len);
static int sdmc_fsync(struct _reent *r, int fd);
static int sdmc_chmod(struct _reent *r, const char *path, mode_t mode);
static int sdmc_fchmod(struct _reent *r, int fd, mode_t mode);
static int sdmc_rmdir(struct _reent *r, const char *name);
/*! @cond INTERNAL */
/*! Open file struct */
typedef struct
{
Handle fd; /*! CTRU handle */
int flags; /*! Flags used in open(2) */
u64 offset; /*! Current file offset */
} sdmc_file_t;
/*! Open directory struct */
typedef struct
{
Handle fd; /*! CTRU handle */
FS_dirent entry_data; /*! Temporary storage for reading entries */
} sdmc_dir_t;
/*! SDMC devoptab */
static devoptab_t
sdmc_devoptab =
{
.name = "sdmc",
.structSize = sizeof(sdmc_file_t),
.open_r = sdmc_open,
.close_r = sdmc_close,
.write_r = sdmc_write,
.read_r = sdmc_read,
.seek_r = sdmc_seek,
.fstat_r = sdmc_fstat,
.stat_r = sdmc_stat,
.link_r = sdmc_link,
.unlink_r = sdmc_unlink,
.chdir_r = sdmc_chdir,
.rename_r = sdmc_rename,
.mkdir_r = sdmc_mkdir,
.dirStateSize = sizeof(sdmc_dir_t),
.diropen_r = sdmc_diropen,
.dirreset_r = sdmc_dirreset,
.dirnext_r = sdmc_dirnext,
.dirclose_r = sdmc_dirclose,
.statvfs_r = sdmc_statvfs,
.ftruncate_r = sdmc_ftruncate,
.fsync_r = sdmc_fsync,
.deviceData = NULL,
.chmod_r = sdmc_chmod,
.fchmod_r = sdmc_fchmod,
.rmdir_r = sdmc_rmdir,
};
/*! SDMC archive handle */
static FS_archive sdmcArchive =
{
.id = ARCH_SDMC,
.lowPath =
{
.type = PATH_EMPTY,
.size = 1,
.data = (u8*)"",
},
};
/*! @endcond */
static char __cwd[PATH_MAX+1] = "/";
static char __fixedpath[PATH_MAX+1];
static uint16_t __utf16path[PATH_MAX+1];
static const char*
sdmc_fixpath(struct _reent *r,
const char *path)
{
size_t units;
uint32_t code;
const uint8_t *p = (const uint8_t*)path;
// Move the path pointer to the start of the actual path
do
{
units = decode_utf8(&code, p);
if(units == (size_t)-1)
{
r->_errno = EILSEQ;
return NULL;
}
p += units;
} while(code != ':' && code != 0);
// We found a colon; p points to the actual path
if(code == ':')
path = (const char*)p;
// Make sure there are no more colons and that the
// remainder of the filename is valid UTF-8
p = (const uint8_t*)path;
do
{
units = decode_utf8(&code, p);
if(units == (size_t)-1)
{
r->_errno = EILSEQ;
return NULL;
}
if(code == ':')
{
r->_errno = EINVAL;
return NULL;
}
p += units;
} while(code != 0);
if(path[0] == '/')
strncpy(__fixedpath, path, PATH_MAX+1);
else
{
strncpy(__fixedpath, __cwd, PATH_MAX+1);
strncat(__fixedpath, path, PATH_MAX+1);
}
if(__fixedpath[PATH_MAX] != 0)
{
__fixedpath[PATH_MAX] = 0;
r->_errno = ENAMETOOLONG;
return NULL;
}
return __fixedpath;
}
static const FS_path
sdmc_utf16path(struct _reent *r,
const char *path)
{
size_t units;
FS_path fspath;
fspath.data = NULL;
if(sdmc_fixpath(r, path) == NULL)
return fspath;
units = utf8_to_utf16(__utf16path, (const uint8_t*)__fixedpath, PATH_MAX+1);
if(units == (size_t)-1)
{
r->_errno = EILSEQ;
return fspath;
}
if(__utf16path[PATH_MAX] != 0)
{
r->_errno = ENAMETOOLONG;
return fspath;
}
__utf16path[units] = 0;
fspath.type = PATH_WCHAR;
fspath.size = (units+1)*sizeof(uint16_t);
fspath.data = (const u8*)__utf16path;
return fspath;
}
extern int __system_argc;
extern char** __system_argv;
static bool sdmcInitialised = false;
/*! Initialize SDMC device */
Result sdmcInit(void)
{
size_t units;
uint32_t code;
char *p;
Result rc = 0;
if(sdmcInitialised)
return rc;
rc = FSUSER_OpenArchive(NULL, &sdmcArchive);
if(rc == 0)
{
int dev = AddDevice(&sdmc_devoptab);
if(dev != -1)
{
setDefaultDevice(dev);
if(__system_argc != 0 && __system_argv[0] != NULL)
{
if(FindDevice(__system_argv[0]) == dev)
{
strncpy(__fixedpath,__system_argv[0],PATH_MAX);
if(__fixedpath[PATH_MAX] != 0)
{
__fixedpath[PATH_MAX] = 0;
}
else
{
char *last_slash = NULL;
p = __fixedpath;
do
{
units = decode_utf8(&code, (const uint8_t*)p);
if(units == (size_t)-1)
{
last_slash = NULL;
break;
}
if(code == '/')
last_slash = p;
p += units;
} while(code != 0);
if(last_slash != NULL)
{
last_slash[0] = 0;
chdir(__fixedpath);
}
}
}
}
}
}
sdmcInitialised = true;
return rc;
}
/*! Clean up SDMC device */
Result sdmcExit(void)
{
Result rc = 0;
if(!sdmcInitialised) return rc;
rc = FSUSER_CloseArchive(NULL, &sdmcArchive);
if(rc == 0)
{
RemoveDevice("sdmc");
sdmcInitialised = false;
}
return rc;
}
/*! Open a file
*
* @param[in,out] r newlib reentrancy struct
* @param[out] fileStruct Pointer to file struct to fill in
* @param[in] path Path to open
* @param[in] flags Open flags from open(2)
* @param[in] mode Permissions to set on create
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_open(struct _reent *r,
void *fileStruct,
const char *path,
int flags,
int mode)
{
Handle fd;
Result rc;
u32 sdmc_flags = 0;
u32 attributes = FS_ATTRIBUTE_NONE;
FS_path fs_path;
fs_path = sdmc_utf16path(r, path);
if(fs_path.data == NULL)
return -1;
/* get pointer to our data */
sdmc_file_t *file = (sdmc_file_t*)fileStruct;
/* check access mode */
switch(flags & O_ACCMODE)
{
/* read-only: do not allow O_APPEND */
case O_RDONLY:
sdmc_flags |= FS_OPEN_READ;
if(flags & O_APPEND)
{
r->_errno = EINVAL;
return -1;
}
break;
/* write-only */
case O_WRONLY:
sdmc_flags |= FS_OPEN_WRITE;
break;
/* read and write */
case O_RDWR:
sdmc_flags |= (FS_OPEN_READ | FS_OPEN_WRITE);
break;
/* an invalid option was supplied */
default:
r->_errno = EINVAL;
return -1;
}
/* create file */
if(flags & O_CREAT)
sdmc_flags |= FS_OPEN_CREATE;
/* Test O_EXCL. */
if((flags & O_CREAT) && (flags & O_EXCL))
{
rc = FSUSER_CreateFile(NULL, sdmcArchive, fs_path, 0);
if(rc != 0)
{
r->_errno = sdmc_translate_error(rc);
return -1;
}
}
/* set attributes */
/*if(!(mode & S_IWUSR))
attributes |= FS_ATTRIBUTE_READONLY;*/
/* open the file */
rc = FSUSER_OpenFile(NULL, &fd, sdmcArchive, fs_path,
sdmc_flags, attributes);
if(rc == 0)
{
if((flags & O_ACCMODE) != O_RDONLY && (flags & O_TRUNC))
{
rc = FSFILE_SetSize(fd, 0);
if(rc != 0)
{
FSFILE_Close(fd);
r->_errno = sdmc_translate_error(rc);
return -1;
}
}
file->fd = fd;
file->flags = (flags & (O_ACCMODE|O_APPEND|O_SYNC));
file->offset = 0;
return 0;
}
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Close an open file
*
* @param[in,out] r newlib reentrancy struct
* @param[in] fd Pointer to sdmc_file_t
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_close(struct _reent *r,
int fd)
{
Result rc;
/* get pointer to our data */
sdmc_file_t *file = (sdmc_file_t*)fd;
rc = FSFILE_Close(file->fd);
if(rc == 0)
return 0;
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Write to an open file
*
* @param[in,out] r newlib reentrancy struct
* @param[in,out] fd Pointer to sdmc_file_t
* @param[in] ptr Pointer to data to write
* @param[in] len Length of data to write
*
* @returns number of bytes written
* @returns -1 for error
*/
static ssize_t
sdmc_write(struct _reent *r,
int fd,
const char *ptr,
size_t len)
{
Result rc;
u32 bytes, bytesWritten = 0;
u32 sync = 0;
/* get pointer to our data */
sdmc_file_t *file = (sdmc_file_t*)fd;
/* check that the file was opened with write access */
if((file->flags & O_ACCMODE) == O_RDONLY)
{
r->_errno = EBADF;
return -1;
}
/* check if this is synchronous or not */
if(file->flags & O_SYNC)
sync = FS_WRITE_FLUSH;
if(file->flags & O_APPEND)
{
/* append means write from the end of the file */
rc = FSFILE_GetSize(file->fd, &file->offset);
if(rc != 0)
{
r->_errno = sdmc_translate_error(rc);
return -1;
}
}
/* Copy to internal buffer and write in chunks.
* You cannot write from read-only memory.
*/
static char tmp_buffer[8192];
while(len > 0)
{
size_t toWrite = len;
if(toWrite > sizeof(tmp_buffer))
toWrite = sizeof(tmp_buffer);
/* copy to internal buffer */
memcpy(tmp_buffer, ptr, toWrite);
/* write the data */
rc = FSFILE_Write(file->fd, &bytes, file->offset,
(u32*)tmp_buffer, (u32)toWrite, sync);
if(rc != 0)
{
/* return partial transfer */
if(bytesWritten > 0)
return bytesWritten;
r->_errno = sdmc_translate_error(rc);
return -1;
}
file->offset += bytes;
bytesWritten += bytes;
ptr += bytes;
len -= bytes;
}
return bytesWritten;
}
/*! Read from an open file
*
* @param[in,out] r newlib reentrancy struct
* @param[in,out] fd Pointer to sdmc_file_t
* @param[out] ptr Pointer to buffer to read into
* @param[in] len Length of data to read
*
* @returns number of bytes read
* @returns -1 for error
*/
static ssize_t
sdmc_read(struct _reent *r,
int fd,
char *ptr,
size_t len)
{
Result rc;
u32 bytes;
/* get pointer to our data */
sdmc_file_t *file = (sdmc_file_t*)fd;
/* check that the file was opened with read access */
if((file->flags & O_ACCMODE) == O_WRONLY)
{
r->_errno = EBADF;
return -1;
}
/* read the data */
rc = FSFILE_Read(file->fd, &bytes, file->offset, (u32*)ptr, (u32)len);
if(rc == 0)
{
/* update current file offset */
file->offset += bytes;
return (ssize_t)bytes;
}
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Update an open file's current offset
*
* @param[in,out] r newlib reentrancy struct
* @param[in,out] fd Pointer to sdmc_file_t
* @param[in] pos Offset to seek to
* @param[in] whence Where to seek from
*
* @returns new offset for success
* @returns -1 for error
*/
static off_t
sdmc_seek(struct _reent *r,
int fd,
off_t pos,
int whence)
{
Result rc;
u64 offset;
/* get pointer to our data */
sdmc_file_t *file = (sdmc_file_t*)fd;
/* find the offset to see from */
switch(whence)
{
/* set absolute position; start offset is 0 */
case SEEK_SET:
offset = 0;
break;
/* set position relative to the current position */
case SEEK_CUR:
offset = file->offset;
break;
/* set position relative to the end of the file */
case SEEK_END:
rc = FSFILE_GetSize(file->fd, &offset);
if(rc != 0)
{
r->_errno = sdmc_translate_error(rc);
return -1;
}
break;
/* an invalid option was provided */
default:
r->_errno = EINVAL;
return -1;
}
/* TODO: A better check that prevents overflow. */
if(pos < 0 && offset < -pos)
{
/* don't allow seek to before the beginning of the file */
r->_errno = EINVAL;
return -1;
}
/* update the current offset */
file->offset = offset + pos;
return file->offset;
}
/*! Get file stats from an open file
*
* @param[in,out] r newlib reentrancy struct
* @param[in] fd Pointer to sdmc_file_t
* @param[out] st Pointer to file stats to fill
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_fstat(struct _reent *r,
int fd,
struct stat *st)
{
Result rc;
u64 size;
sdmc_file_t *file = (sdmc_file_t*)fd;
rc = FSFILE_GetSize(file->fd, &size);
if(rc == 0)
{
memset(st, 0, sizeof(struct stat));
st->st_size = (off_t)size;
st->st_nlink = 1;
st->st_mode = S_IFREG | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
return 0;
}
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Get file stats
*
* @param[in,out] r newlib reentrancy struct
* @param[in] file Path to file
* @param[out] st Pointer to file stats to fill
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_stat(struct _reent *r,
const char *file,
struct stat *st)
{
Handle fd;
Result rc;
FS_path fs_path;
fs_path = sdmc_utf16path(r, file);
if(fs_path.data == NULL)
return -1;
if((rc = FSUSER_OpenFile(NULL, &fd, sdmcArchive, fs_path,
FS_OPEN_READ, FS_ATTRIBUTE_NONE)) == 0)
{
sdmc_file_t tmpfd = { .fd = fd };
rc = sdmc_fstat(r, (int)&tmpfd, st);
FSFILE_Close(fd);
return rc;
}
else if((rc = FSUSER_OpenDirectory(NULL, &fd, sdmcArchive, fs_path)) == 0)
{
memset(st, 0, sizeof(struct stat));
st->st_nlink = 1;
st->st_mode = S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO;
return 0;
}
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Hard link a file
*
* @param[in,out] r newlib reentrancy struct
* @param[in] existing Path of file to link
* @param[in] newLink Path of new link
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_link(struct _reent *r,
const char *existing,
const char *newLink)
{
r->_errno = ENOSYS;
return -1;
}
/*! Unlink a file
*
* @param[in,out] r newlib reentrancy struct
* @param[in] name Path of file to unlink
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_unlink(struct _reent *r,
const char *name)
{
Result rc;
FS_path fs_path;
fs_path = sdmc_utf16path(r, name);
if(fs_path.data == NULL)
return -1;
rc = FSUSER_DeleteFile(NULL, sdmcArchive, fs_path);
if(rc == 0)
return 0;
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Change current working directory
*
* @param[in,out] r newlib reentrancy struct
* @param[in] name Path to new working directory
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_chdir(struct _reent *r,
const char *name)
{
Handle fd;
Result rc;
FS_path fs_path;
fs_path = sdmc_utf16path(r, name);
if(fs_path.data == NULL)
return -1;
rc = FSUSER_OpenDirectory(NULL, &fd, sdmcArchive, fs_path);
if(rc == 0)
{
FSDIR_Close(fd);
strncpy(__cwd, __fixedpath, PATH_MAX);
return 0;
}
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Rename a file
*
* @param[in,out] r newlib reentrancy struct
* @param[in] oldName Path to rename from
* @param[in] newName Path to rename to
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_rename(struct _reent *r,
const char *oldName,
const char *newName)
{
Result rc;
FS_path fs_path_old, fs_path_new;
static uint16_t __utf16path_old[PATH_MAX+1];
fs_path_old = sdmc_utf16path(r, oldName);
if(fs_path_old.data == NULL)
return -1;
memcpy(__utf16path_old, __utf16path, sizeof(__utf16path));
fs_path_old.data = (const u8*)__utf16path_old;
fs_path_new = sdmc_utf16path(r, newName);
if(fs_path_new.data == NULL)
return -1;
rc = FSUSER_RenameFile(NULL, sdmcArchive, fs_path_old, sdmcArchive, fs_path_new);
if(rc == 0)
return 0;
rc = FSUSER_RenameDirectory(NULL, sdmcArchive, fs_path_old, sdmcArchive, fs_path_new);
if(rc == 0)
return 0;
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Create a directory
*
* @param[in,out] r newlib reentrancy struct
* @param[in] path Path of directory to create
* @param[in] mode Permissions of created directory
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_mkdir(struct _reent *r,
const char *path,
int mode)
{
Result rc;
FS_path fs_path;
fs_path = sdmc_utf16path(r, path);
if(fs_path.data == NULL)
return -1;
/* TODO: Use mode to set directory attributes. */
rc = FSUSER_CreateDirectory(NULL, sdmcArchive, fs_path);
if(rc == 0)
return 0;
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Open a directory
*
* @param[in,out] r newlib reentrancy struct
* @param[in] dirState Pointer to open directory state
* @param[in] path Path of directory to open
*
* @returns dirState for success
* @returns NULL for error
*/
static DIR_ITER*
sdmc_diropen(struct _reent *r,
DIR_ITER *dirState,
const char *path)
{
Handle fd;
Result rc;
FS_path fs_path;
fs_path = sdmc_utf16path(r, path);
if(fs_path.data == NULL)
return NULL;
/* get pointer to our data */
sdmc_dir_t *dir = (sdmc_dir_t*)(dirState->dirStruct);
/* open the directory */
rc = FSUSER_OpenDirectory(NULL, &fd, sdmcArchive, fs_path);
if(rc == 0)
{
dir->fd = fd;
memset(&dir->entry_data, 0, sizeof(dir->entry_data));
return dirState;
}
r->_errno = sdmc_translate_error(rc);
return NULL;
}
/*! Reset an open directory to its intial state
*
* @param[in,out] r newlib reentrancy struct
* @param[in] dirState Pointer to open directory state
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_dirreset(struct _reent *r,
DIR_ITER *dirState)
{
r->_errno = ENOSYS;
return -1;
}
/*! Fetch the next entry of an open directory
*
* @param[in,out] r newlib reentrancy struct
* @param[in] dirState Pointer to open directory state
* @param[out] filename Buffer to store entry name
* @param[out] filestat Buffer to store entry attributes
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_dirnext(struct _reent *r,
DIR_ITER *dirState,
char *filename,
struct stat *filestat)
{
Result rc;
u32 entries;
size_t units;
/* get pointer to our data */
sdmc_dir_t *dir = (sdmc_dir_t*)(dirState->dirStruct);
/* fetch the next entry */
memset(&dir->entry_data, 0, sizeof(dir->entry_data));
rc = FSDIR_Read(dir->fd, &entries, 1, &dir->entry_data);
if(rc == 0)
{
if(entries == 0)
{
/* there are no more entries; ENOENT signals end-of-directory */
r->_errno = ENOENT;
return -1;
}
/* fill in the stat info */
filestat->st_ino = 0;
if(dir->entry_data.isDirectory)
filestat->st_mode = S_IFDIR;
else
filestat->st_mode = S_IFREG;
/* convert name from UTF-16 to UTF-8 */
memset(filename, 0, NAME_MAX);
units = utf16_to_utf8((uint8_t*)filename, dir->entry_data.name, NAME_MAX);
if(units == (size_t)-1)
{
r->_errno = EILSEQ;
return -1;
}
if(filename[NAME_MAX-1] != 0)
{
r->_errno = ENAMETOOLONG;
return -1;
}
return 0;
}
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Close an open directory
*
* @param[in,out] r newlib reentrancy struct
* @param[in] dirState Pointer to open directory state
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_dirclose(struct _reent *r,
DIR_ITER *dirState)
{
Result rc;
/* get pointer to our data */
sdmc_dir_t *dir = (sdmc_dir_t*)(dirState->dirStruct);
/* close the directory */
rc = FSDIR_Close(dir->fd);
if(rc == 0)
return 0;
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Get filesystem statistics
*
* @param[in,out] r newlib reentrancy struct
* @param[in] path Path to filesystem to get statistics of
* @param[out] buf Buffer to fill
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_statvfs(struct _reent *r,
const char *path,
struct statvfs *buf)
{
Result rc;
u32 clusterSize, numClusters, freeClusters;
u8 writable = 0;
rc = FSUSER_GetSdmcArchiveResource(NULL,
NULL,
&clusterSize,
&numClusters,
&freeClusters);
if(rc == 0)
{
buf->f_bsize = clusterSize;
buf->f_frsize = clusterSize;
buf->f_blocks = numClusters;
buf->f_bfree = freeClusters;
buf->f_bavail = freeClusters;
buf->f_files = 0; //??? how to get
buf->f_ffree = freeClusters;
buf->f_favail = freeClusters;
buf->f_fsid = 0; //??? how to get
buf->f_flag = ST_NOSUID;
buf->f_namemax = 0; //??? how to get
rc = FSUSER_IsSdmcWritable(NULL, &writable);
if(rc != 0 || !writable)
buf->f_flag |= ST_RDONLY;
return 0;
}
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Truncate an open file
*
* @param[in,out] r newlib reentrancy struct
* @param[in] fd Pointer to sdmc_file_t
* @param[in] len Length to truncate file to
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_ftruncate(struct _reent *r,
int fd,
off_t len)
{
Result rc;
/* get pointer to our data */
sdmc_file_t *file = (sdmc_file_t*)fd;
/* make sure length is non-negative */
if(len < 0)
{
r->_errno = EINVAL;
return -1;
}
/* set the new file size */
rc = FSFILE_SetSize(file->fd, len);
if(rc == 0)
return 0;
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Synchronize a file to media
*
* @param[in,out] r newlib reentrancy struct
* @param[in] fd Pointer to sdmc_file_t
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_fsync(struct _reent *r,
int fd)
{
Result rc;
/* get pointer to our data */
sdmc_file_t *file = (sdmc_file_t*)fd;
rc = FSFILE_Flush(file->fd);
if(rc == 0)
return 0;
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Change a file's mode
*
* @param[in,out] r newlib reentrancy struct
* @param[in] path Path to file to update
* @param[in] mode New mode to set
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_chmod(struct _reent *r,
const char *path,
mode_t mode)
{
r->_errno = ENOSYS;
return -1;
}
/*! Change an open file's mode
*
* @param[in,out] r newlib reentrancy struct
* @param[in] fd Pointer to sdmc_file_t
* @param[in] mode New mode to set
*
* @returns 0 for success
* @returns -1 for failure
*/
static int
sdmc_fchmod(struct _reent *r,
int fd,
mode_t mode)
{
r->_errno = ENOSYS;
return -1;
}
/*! Remove a directory
*
* @param[in,out] r newlib reentrancy struct
* @param[in] name Path of directory to remove
*
* @returns 0 for success
* @returns -1 for error
*/
static int
sdmc_rmdir(struct _reent *r,
const char *name)
{
Result rc;
FS_path fs_path;
fs_path = sdmc_utf16path(r, name);
if(fs_path.data == NULL)
return -1;
rc = FSUSER_DeleteDirectory(NULL, sdmcArchive, fs_path);
if(rc == 0)
return 0;
r->_errno = sdmc_translate_error(rc);
return -1;
}
/*! Error map */
typedef struct
{
Result fs_error; //!< Error from FS service
int error; //!< POSIX errno
} error_map_t;
/*! Error table */
static const error_map_t error_table[] =
{
/* keep this list sorted! */
{ 0x082044BE, EEXIST, },
{ 0x086044D2, ENOSPC, },
{ 0xC8804478, ENOENT, },
{ 0xC92044FA, ENOENT, },
{ 0xE0E046BE, EINVAL, },
{ 0xE0E046BF, ENAMETOOLONG, },
};
static const size_t num_errors = sizeof(error_table)/sizeof(error_table[0]);
/*! Comparison function for bsearch on error_table
*
* @param[in] p1 Left side of comparison
* @param[in] p2 Right side of comparison
*
* @returns <0 if lhs < rhs
* @returns >0 if lhs > rhs
* @returns 0 if lhs == rhs
*/
static int
error_cmp(const void *p1, const void *p2)
{
const error_map_t *lhs = (const error_map_t*)p1;
const error_map_t *rhs = (const error_map_t*)p2;
if((u32)lhs->fs_error < (u32)rhs->fs_error)
return -1;
else if((u32)lhs->fs_error > (u32)rhs->fs_error)
return 1;
return 0;
}
/*! Translate FS service error to errno
*
* @param[in] error FS service error
*
* @returns errno
*/
static int
sdmc_translate_error(Result error)
{
error_map_t key = { .fs_error = error };
const error_map_t *rc = bsearch(&key, error_table, num_errors,
sizeof(error_map_t), error_cmp);
if(rc != NULL)
return rc->error;
return (int)error;
}
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