Merge branch 'refactor'
This commit is contained in:
mtheall
commit
cdd066a4ba
802
libctru/source/sdmc_dev.c
Normal file
802
libctru/source/sdmc_dev.c
Normal file
@ -0,0 +1,802 @@
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/iosupport.h>
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#include <3ds.h>
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/*! @internal
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*
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* @file sdmc_dev.c
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*
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* SDMC Device
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*/
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static int sdmc_open(struct _reent *r, void *fileStruct, const char *path, int flags, int mode);
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static int sdmc_close(struct _reent *r, int fd);
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static ssize_t sdmc_write(struct _reent *r, int fd, const char *ptr, size_t len);
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static ssize_t sdmc_read(struct _reent *r, int fd, char *ptr, size_t len);
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static off_t sdmc_seek(struct _reent *r, int fd, off_t pos, int dir);
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static int sdmc_fstat(struct _reent *r, int fd, struct stat *st);
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static int sdmc_stat(struct _reent *r, const char *file, struct stat *st);
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static int sdmc_link(struct _reent *r, const char *existing, const char *newLink);
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static int sdmc_unlink(struct _reent *r, const char *name);
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static int sdmc_chdir(struct _reent *r, const char *name);
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static int sdmc_rename(struct _reent *r, const char *oldName, const char *newName);
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static int sdmc_mkdir(struct _reent *r, const char *path, int mode);
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static DIR_ITER* sdmc_diropen(struct _reent *r, DIR_ITER *dirState, const char *path);
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static int sdmc_dirreset(struct _reent *r, DIR_ITER *dirState);
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static int sdmc_dirnext(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *filestat);
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static int sdmc_dirclose(struct _reent *r, DIR_ITER *dirState);
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static int sdmc_statvfs(struct _reent *r, const char *path, struct statvfs *buf);
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static int sdmc_ftruncate(struct _reent *r, int fd, off_t len);
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static int sdmc_fsync(struct _reent *r, int fd);
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static int sdmc_chmod(struct _reent *r, const char *path, mode_t mode);
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static int sdmc_fchmod(struct _reent *r, int fd, mode_t mode);
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/*! @cond INTERNAL */
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/*! Open file struct */
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typedef struct
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{
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Handle fd; /*! CTRU handle */
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int flags; /*! Flags used in open(2) */
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u64 offset; /*! Current file offset */
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} sdmc_file_t;
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/*! Open directory struct */
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typedef struct
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{
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Handle fd; /*! CTRU handle */
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FS_dirent entry_data; /*! Temporary storage for reading entries */
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} sdmc_dir_t;
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/*! SDMC devoptab */
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static devoptab_t
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sdmc_devoptab =
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{
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.name = "sdmc",
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.structSize = sizeof(sdmc_file_t),
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.open_r = sdmc_open,
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.close_r = sdmc_close,
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.write_r = sdmc_write,
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.read_r = sdmc_read,
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.seek_r = sdmc_seek,
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.fstat_r = sdmc_fstat,
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.stat_r = sdmc_stat,
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.link_r = sdmc_link,
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.unlink_r = sdmc_unlink,
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.chdir_r = sdmc_chdir,
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.rename_r = sdmc_rename,
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.mkdir_r = sdmc_mkdir,
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.dirStateSize = sizeof(sdmc_dir_t),
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.diropen_r = sdmc_diropen,
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.dirreset_r = sdmc_dirreset,
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.dirnext_r = sdmc_dirnext,
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.dirclose_r = sdmc_dirclose,
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.statvfs_r = sdmc_statvfs,
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.ftruncate_r = sdmc_ftruncate,
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.fsync_r = sdmc_fsync,
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.deviceData = NULL,
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.chmod_r = sdmc_chmod,
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.fchmod_r = sdmc_fchmod,
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};
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/*! SDMC archive handle */
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static FS_archive sdmcArchive =
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{
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.id = 0x00000009,
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.lowPath =
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{
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.type = PATH_EMPTY,
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.size = 1,
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.data = (u8*)"",
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},
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};
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/*! @endcond */
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/*! Initialize SDMC device */
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Result sdmcInit(void)
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{
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Result rc;
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rc = FSUSER_OpenArchive(NULL, &sdmcArchive);
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if(rc == 0)
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AddDevice(&sdmc_devoptab);
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return rc;
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}
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/*! Clean up SDMC device */
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Result sdmcExit(void)
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{
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Result rc;
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rc = FSUSER_CloseArchive(NULL, &sdmcArchive);
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if(rc == 0)
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RemoveDevice("sdmc");
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return rc;
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}
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/*! Open a file
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*
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* @param[in,out] r newlib reentrancy struct
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* @param[out] fileStruct Pointer to file struct to fill in
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* @param[in] path Path to open
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* @param[in] flags Open flags from open(2)
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* @param[in] mode Permissions to set on create
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*
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* @returns 0 for success
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* @returns -1 for error
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*/
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static int
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sdmc_open(struct _reent *r,
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void *fileStruct,
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const char *path,
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int flags,
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int mode)
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{
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Handle fd;
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Result rc;
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u32 sdmc_flags = 0;
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u32 attributes = FS_ATTRIBUTE_NONE;
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/* get pointer to our data */
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sdmc_file_t *file = (sdmc_file_t*)fileStruct;
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/* check access mode */
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switch(flags & O_ACCMODE)
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{
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/* read-only: do not allow O_APPEND */
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case O_RDONLY:
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sdmc_flags |= FS_OPEN_READ;
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if(flags & O_APPEND)
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{
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r->_errno = EINVAL;
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return -1;
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}
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break;
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/* write-only */
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case O_WRONLY:
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sdmc_flags |= FS_OPEN_WRITE;
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break;
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/* read and write */
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case O_RDWR:
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sdmc_flags |= (FS_OPEN_READ | FS_OPEN_WRITE);
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break;
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/* an invalid option was supplied */
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default:
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r->_errno = EINVAL;
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return -1;
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}
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/* create file */
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if(flags & O_CREAT)
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sdmc_flags |= FS_OPEN_CREATE;
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/* TODO: Test O_EXCL. */
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/* set attributes */
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if(!(mode & S_IWUSR))
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attributes |= FS_ATTRIBUTE_READONLY;
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/* open the file */
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rc = FSUSER_OpenFile(NULL, &fd, sdmcArchive, FS_makePath(PATH_CHAR, path),
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sdmc_flags, attributes);
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if(rc == 0)
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{
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file->fd = fd;
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file->flags = (flags & (O_ACCMODE|O_APPEND|O_SYNC));
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file->offset = 0;
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return 0;
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}
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r->_errno = rc;
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return -1;
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}
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/*! Close an open file
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*
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* @param[in,out] r newlib reentrancy struct
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* @param[in] fd Pointer to sdmc_file_t
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*
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* @returns 0 for success
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* @returns -1 for error
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*/
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static int
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sdmc_close(struct _reent *r,
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int fd)
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{
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Result rc;
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/* get pointer to our data */
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sdmc_file_t *file = (sdmc_file_t*)fd;
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rc = FSFILE_Close(file->fd);
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if(rc == 0)
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return 0;
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r->_errno = rc;
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return -1;
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}
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/*! Write to an open file
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*
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* @param[in,out] r newlib reentrancy struct
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* @param[in,out] fd Pointer to sdmc_file_t
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* @param[in] ptr Pointer to data to write
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* @param[in] len Length of data to write
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*
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* @returns number of bytes written
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* @returns -1 for error
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*/
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static ssize_t
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sdmc_write(struct _reent *r,
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int fd,
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const char *ptr,
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size_t len)
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{
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Result rc;
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u32 bytes;
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u32 sync = 0;
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u64 offset;
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/* get pointer to our data */
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sdmc_file_t *file = (sdmc_file_t*)fd;
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/* check that the file was opened with write access */
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if((file->flags & O_ACCMODE) == O_RDONLY)
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{
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r->_errno = EBADF;
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return -1;
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}
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/* check if this is synchronous or not */
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if(file->flags & O_SYNC)
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sync = 0x10001;
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/* initialize offset */
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offset = file->offset;
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if(file->flags & O_APPEND)
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{
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/* append means write from the end of the file */
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rc = FSFILE_GetSize(file->fd, &offset);
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if(rc != 0)
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{
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r->_errno = rc;
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return -1;
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}
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}
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/* TODO: Copy to internal buffer and write in chunks.
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* You cannot write from read-only memory.
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*/
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/* write the data */
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rc = FSFILE_Write(file->fd, &bytes, offset, (u32*)ptr, (u32)len, sync);
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if(rc == 0)
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{
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/* update current file offset; if O_APPEND, this moves it to the
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* new end-of-file
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*/
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file->offset = offset + bytes;
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return (ssize_t)bytes;
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}
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r->_errno = rc;
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return -1;
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}
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/*! Read from an open file
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*
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* @param[in,out] r newlib reentrancy struct
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* @param[in,out] fd Pointer to sdmc_file_t
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* @param[out] ptr Pointer to buffer to read into
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* @param[in] len Length of data to read
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*
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* @returns number of bytes read
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* @returns -1 for error
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*/
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static ssize_t
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sdmc_read(struct _reent *r,
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int fd,
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char *ptr,
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size_t len)
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{
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Result rc;
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u32 bytes;
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/* get pointer to our data */
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sdmc_file_t *file = (sdmc_file_t*)fd;
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/* check that the file was opened with read access */
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if((file->flags & O_ACCMODE) == O_WRONLY)
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{
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r->_errno = EBADF;
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return -1;
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}
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/* read the data */
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rc = FSFILE_Read(file->fd, &bytes, file->offset, (u32*)ptr, (u32)len);
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if(rc == 0)
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{
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/* update current file offset */
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file->offset += bytes;
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return (ssize_t)bytes;
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}
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r->_errno = rc;
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return -1;
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}
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/*! Update an open file's current offset
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*
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* @param[in,out] r newlib reentrancy struct
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* @param[in,out] fd Pointer to sdmc_file_t
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* @param[in] pos Offset to seek to
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* @param[in] whence Where to seek from
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*
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* @returns 0 for success
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* @returns -1 for error
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*/
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static off_t
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sdmc_seek(struct _reent *r,
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int fd,
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off_t pos,
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int whence)
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{
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Result rc;
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u64 offset;
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/* get pointer to our data */
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sdmc_file_t *file = (sdmc_file_t*)fd;
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/* find the offset to see from */
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switch(whence)
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{
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/* set absolute position; start offset is 0 */
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case SEEK_SET:
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offset = 0;
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break;
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/* set position relative to the current position */
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case SEEK_CUR:
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offset = file->offset;
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break;
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/* set position relative to the end of the file */
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case SEEK_END:
|
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rc = FSFILE_GetSize(file->fd, &offset);
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||||
if(rc != 0)
|
||||
{
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r->_errno = rc;
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||||
return -1;
|
||||
}
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||||
break;
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||||
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/* an invalid option was provided */
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default:
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r->_errno = EINVAL;
|
||||
return -1;
|
||||
}
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||||
|
||||
/* TODO: A better check that prevents overflow. */
|
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if(pos < 0 && offset < -pos)
|
||||
{
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/* don't allow seek to before the beginning of the file */
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r->_errno = EINVAL;
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||||
return -1;
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}
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/* update the current offset */
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file->offset = offset + pos;
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return 0;
|
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}
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||||
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/*! Get file stats from an open file
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||||
*
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* @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)
|
||||
{
|
||||
r->_errno = ENOSYS;
|
||||
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)
|
||||
{
|
||||
r->_errno = ENOSYS;
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*! Hard link a file
|
||||
*
|
||||
* @param[in,out] r newlib reentrancy struct
|
||||
* @param[in] existing Path of ile 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)
|
||||
{
|
||||
r->_errno = ENOSYS;
|
||||
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)
|
||||
{
|
||||
r->_errno = ENOSYS;
|
||||
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)
|
||||
{
|
||||
r->_errno = ENOSYS;
|
||||
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;
|
||||
|
||||
/* TODO: Use mode to set directory attributes. */
|
||||
|
||||
rc = FSUSER_CreateDirectory(NULL, sdmcArchive, FS_makePath(PATH_CHAR, path));
|
||||
if(rc == 0)
|
||||
return 0;
|
||||
|
||||
r->_errno = ENOSYS;
|
||||
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;
|
||||
|
||||
/* get pointer to our data */
|
||||
sdmc_dir_t *dir = (sdmc_dir_t*)(dirState->dirStruct);
|
||||
|
||||
/* open the directory */
|
||||
rc = FSUSER_OpenDirectory(NULL, &fd, sdmcArchive, FS_makePath(PATH_CHAR, path));
|
||||
if(rc == 0)
|
||||
{
|
||||
dir->fd = fd;
|
||||
memset(&dir->entry_data, 0, sizeof(dir->entry_data));
|
||||
return dirState;
|
||||
}
|
||||
|
||||
r->_errno = 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;
|
||||
u16 *name;
|
||||
|
||||
/* get pointer to our data */
|
||||
sdmc_dir_t *dir = (sdmc_dir_t*)(dirState->dirStruct);
|
||||
|
||||
/* fetch the next entry */
|
||||
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;
|
||||
|
||||
/* copy the name */
|
||||
name = dir->entry_data.name;
|
||||
while(*name)
|
||||
*filename++ = *name++;
|
||||
*filename = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
r->_errno = 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 = 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;
|
||||
u32 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 = 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 = 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 = 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;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user