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Diffstat (limited to 'libiot/vfs/vfs.c')
| -rw-r--r-- | libiot/vfs/vfs.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/libiot/vfs/vfs.c b/libiot/vfs/vfs.c new file mode 100644 index 0000000..2d40ee6 --- /dev/null +++ b/libiot/vfs/vfs.c @@ -0,0 +1,322 @@ +/* + * Copyright (C) 2015 - 2018, IBEROXARXA SERVICIOS INTEGRALES, S.L. + * Copyright (C) 2015 - 2018, Jaume Olivé Petrus (jolive@whitecatboard.org) + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the <organization> nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * * The WHITECAT logotype cannot be changed, you can remove it, but you + * cannot change it in any way. The WHITECAT logotype is: + * + * /\ /\ + * / \_____/ \ + * /_____________\ + * W H I T E C A T + * + * * Redistributions in binary form must retain all copyright notices printed + * to any local or remote output device. This include any reference to + * Lua RTOS, whitecatboard.org, Lua, and other copyright notices that may + * appear in the future. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Lua RTOS common vfs functions + * + */ + +#include "vfs.h" + +#include <errno.h> +#include <stdarg.h> +#include <unistd.h> +#include <stdlib.h> + +//#if CONFIG_LUA_RTOS_USE_SPIFFS +#include "../spiffs/spiffs.h" +//#endif + +#if CONFIG_LUA_RTOS_USE_LFS +#include <lfs.h> +#endif + +#if CONFIG_LUA_RTOS_USE_FAT +#include <ff.h> +#endif + +#if CONFIG_LUA_RTOS_USE_RAM_FS +#include <ramfs.h> +#endif + +#if CONFIG_LUA_RTOS_USE_ROM_FS +#include <romfs.h> +#endif + +#include <sys/fcntl.h> + +//#include <sys/mount.h> + +//extern const struct mount_pt mountps[]; + +#ifndef MAX +#define MAX(a,b) (((a)>(b))?(a):(b)) +#endif + +vfs_dir_t *vfs_allocate_dir(const char *vfs, const char *name) { + // Allocate directory + vfs_dir_t *dir = calloc(1, sizeof(vfs_dir_t)); + if (!dir) { + errno = ENOMEM; + return NULL; + } + +#if 0 //{} + // If the directory is the root folder, and the file system is the root + // file system, fill the mount pointer to read the mount points in the + // readdir function + if ((strcmp(name, "/") == 0) && (strcmp(mount_get_root()->fs, vfs) == 0)) { + dir->mount = mountps; + } else { + dir->mount = NULL; + } +#endif + + size_t size_dir = 0; + size_t size_info = 0; + +//#if CONFIG_LUA_RTOS_USE_SPIFFS + if (strcmp(vfs,"spiffs") == 0) { + size_dir = sizeof(spiffs_DIR); + size_info = sizeof(struct spiffs_dirent); + } +//#endif + +#if CONFIG_LUA_RTOS_USE_LFS + if (strcmp(vfs,"lfs") == 0) { + size_dir = sizeof(lfs_dir_t); + size_info = sizeof(struct lfs_info); + } +#endif + +#if CONFIG_LUA_RTOS_USE_RAM_FS + if (strcmp(vfs,"ramfs") == 0) { + size_dir = sizeof(ramfs_dir_t); + size_info = sizeof(ramfs_info_t); + } +#endif + +#if CONFIG_LUA_RTOS_USE_ROM_FS + if (strcmp(vfs,"romfs") == 0) { + size_dir = sizeof(romfs_dir_t); + size_info = sizeof(romfs_info_t); + } +#endif + +#if CONFIG_LUA_RTOS_USE_FAT + if (strcmp(vfs,"fat") == 0) { + size_dir = sizeof(FF_DIR); + size_info = sizeof(FILINFO); + } +#endif + + dir->fs_dir = (void *)calloc(1, size_dir); + if (!dir->fs_dir) { + vfs_free_dir(dir); + errno = ENOMEM; + return NULL; + } + + dir->fs_info = (void *)calloc(1, size_info); + if (!dir->fs_info) { + vfs_free_dir(dir); + errno = ENOMEM; + return NULL; + } + + dir->path = strdup(name); + if (!dir->path) { + vfs_free_dir(dir); + errno = ENOMEM; + return NULL; + } + + return dir; +} + +void vfs_free_dir(vfs_dir_t *dir) { + if (dir) { + if (dir->path) free(dir->path); + if (dir->fs_dir) free(dir->fs_dir); + if (dir->fs_info) free(dir->fs_info); + free(dir); + } +} + +vfs_fd_local_storage_t *vfs_create_fd_local_storage(int num) { + vfs_fd_local_storage_t *ptr; + + ptr = calloc(num, sizeof(vfs_fd_local_storage_t)); + if (!ptr) { + errno = ENOMEM; + return NULL; + } + + return ptr; +} + +void vfs_destroy_fd_local_storage(vfs_fd_local_storage_t *ptr) { + free(ptr); +} + +int vfs_generic_fcntl(vfs_fd_local_storage_t *local_storage, int fd, int cmd, va_list args) { + int result = 0; + + if (cmd == F_GETFL) { + if (local_storage) { + return local_storage[fd].flags; + } else { + return 0; + } + } else if (cmd == F_SETFL) { + if (local_storage) { + local_storage[fd].flags = va_arg(args, int); + } + } else { + result = -1; + errno = ENOSYS; + } + + return result; +} + +ssize_t vfs_generic_read(vfs_fd_local_storage_t *local_storage, vfs_has_bytes has_bytes, vfs_get_byte get, int fd, void * dst, size_t size) { + char *c = (char *)dst; + int bytes = 0; + + while (size) { + if (local_storage && (local_storage[fd].flags & O_NONBLOCK)) { + if (!has_bytes(fd, 0)) { + if (bytes > 0) { + return bytes; + } + + errno = EAGAIN; + return -1; + } + } else { + if (!has_bytes(fd, 0) && (bytes > 0)) { + return bytes; + } + } + + if (!get(fd, c)) { + errno = EIO; + return -1; + } + + c++; + size--; + bytes++; + } + + return bytes; +} + +ssize_t vfs_generic_write(vfs_fd_local_storage_t *local_storage, vfs_put_byte put, int fd, const void *data, size_t size) { + char *c = (char *)data; + int bytes = 0; + + while (size) { +#if CONFIG_NEWLIB_STDOUT_LINE_ENDING_LF + char n; + + if (*c=='\n') { + n = '\r'; + put(fd, &n); + } +#endif + + put(fd, c); + c++; + size--; + bytes++; + } + + return bytes; +} + +ssize_t vfs_generic_writev(vfs_fd_local_storage_t *local_storage, vfs_put_byte put, int fd, const struct iovec *iov, int iovcnt) { + int bytes = 0; + int len = 0; + char *c; + + while (iovcnt) { + c = (char *)iov->iov_base; + len = iov->iov_len; + + while (len) { + put(fd, c); + c++; + len--; + bytes++; + } + iov++; + iovcnt--; + } + + return bytes; +} + +int vfs_generic_select(vfs_fd_local_storage_t *local_storage, vfs_has_bytes has_bytes, vfs_free_bytes free_bytes, int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, struct timeval *timeout) { + int to = 0xffffffff; // Default timeout + + // Get the timeout + if (timeout) { + to = MAX((timeout->tv_sec * 1000 + (timeout->tv_usec + 500) / 1000),1); + } + + // Inspect all the file descriptors + int num = 0; // Number of available file descriptors + int fd; // Current inspected file descriptor + + for(fd = 0;fd <= maxfdp1;fd++) { + if (readset && FD_ISSET(fd, readset)) { + if (has_bytes(fd, to)) { + num++; + } else { + FD_CLR(fd, readset); + } + } + + if (writeset && FD_ISSET(fd, writeset)) { + if (free_bytes(fd) > 0) { + num++; + } else { + FD_CLR(fd, writeset); + } + } + + if (exceptset && FD_ISSET(fd, exceptset)) { + } + } + + return num; +} |