| 0,0 → 1,288 |
|---|
| /* |
| * Copyright (c) 2007 Michal Konopa |
| * Copyright (c) 2007 Martin Jelen |
| * Copyright (c) 2007 Peter Majer |
| * 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. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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. |
| */ |
| |
| /** @addtogroup libc |
| * @{ |
| */ |
| |
| /** |
| * @file file.c |
| * @brief The user library for working with the file system |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <async.h> |
| #include <ipc/services.h> |
| #include <ipc/ipc.h> |
| #include <sys/mman.h> |
| #include <io/file.h> |
| #include <bool.h> |
| #include <err.h> |
| #include <align.h> |
| #include "../../../fs/dir.h" |
| #include "../../../share/message.h" |
| #include "../../../share/shared_proto.h" |
| |
| #define CONNECT_SLEEP_INTERVAL 10000 |
| #define CONNECT_SLEEP_TIMEOUT 100000 |
| |
| /** |
| * |
| */ |
| static int fs_phone; |
| |
| static file_t *file_connect(); |
| static int file_disconnect(file_t *file); |
| |
| /** |
| * Connect to the FS task and share memory with it for further data and |
| * extended memory transfers |
| */ |
| file_t *file_connect() { |
| file_t *result; |
| |
| size_t size; |
| void *share = NULL; |
| int retval; |
| |
| size = ALIGN_UP(BLOCK_SIZE * sizeof(char), PAGE_SIZE); |
| share = mmap(share, size, AS_AREA_READ | AS_AREA_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); |
| if ((int) share < 0) { |
| f_err = F_MMAP_FAILURE; |
| return NULL; |
| } |
| |
| retval = async_req_2(fs_phone, FS_NEW_CONSUMER, task_get_id(), 0, NULL, NULL); |
| if (retval < 0) { |
| f_err = F_COMM_FAILURE; |
| return NULL; |
| } |
| |
| int flags = 0; |
| flags = AS_AREA_READ | AS_AREA_WRITE; |
| retval = async_req_3(fs_phone, IPC_M_AS_AREA_SEND, (uintptr_t)share, size, flags, NULL, NULL, NULL); |
| if (retval < 0) { |
| f_err = F_COMM_FAILURE; |
| return NULL; |
| } |
| |
| /* Allocating structure for extended message. */ |
| message_params_t *params = malloc(sizeof(message_params_t)); |
| memset((void*) params, 0, sizeof(message_params_t)); |
| |
| result = malloc(sizeof(file_t)); |
| result->share = share; |
| result->size = size; |
| result->params = params; |
| |
| f_err = F_OK; |
| return result; |
| } |
| |
| /** |
| * Disconnect from the FS task, unsharing memory and freeing the file data structure |
| */ |
| int file_disconnect(file_t *file) { |
| int retval = send_request(fs_phone, FS_DROP_CONSUMER, file->params, file->share); |
| if (retval < 0) |
| return -1; |
| |
| /* Unmapping share area. */ |
| retval = munmap(file->share, file->size); |
| if (retval < 0) |
| return -1; |
| |
| file->size = ALIGN_UP(BLOCK_SIZE * sizeof(char), PAGE_SIZE); |
| file->share = mmap(file->share, file->size, AS_AREA_READ | AS_AREA_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0); |
| if ((int) (file->share) < 0) |
| return -1; |
| |
| free(file); |
| f_err = F_OK; |
| return F_OK; |
| } |
| |
| /** |
| * List contents of the current directory |
| */ |
| dir_item_t *ls(unsigned int *length) { |
| dir_item_t *result; |
| unsigned short entries_num; |
| |
| file_t *shared_file = file_connect(); |
| if (shared_file == NULL) |
| return NULL; |
| |
| /* We want lookup our work directory. */ |
| retval = send_request(fs_phone, FS_DSUM, shared_file->params, shared_file->share); |
| if (retval < 0) { |
| f_err = F_READ_ERROR; |
| return NULL; |
| } |
| |
| entries_num = retval; |
| *length = entries_num; |
| |
| result = malloc(entries_num * sizeof (dir_item_t)); |
| |
| int entry; |
| for (entry = 0; entry < entries_num; entry++) { |
| shared_file->params->entry_number = entry; |
| retval = send_request(fs_phone, FS_READENTRY, shared_file->params, shared_file->share); |
| if (retval < 0) { |
| f_err = F_READ_ERROR; |
| return NULL; |
| } |
| |
| memcpy(&(result[entry].inode_num), shared_file->share, sizeof(unsigned short)); |
| memcpy(result[entry].name, (void *)(shared_file->share+sizeof(unsigned short)), retval-sizeof(unsigned short)); |
| |
| /* Do not show empty entries. */ |
| if (!result[entry].inode_num) |
| continue; |
| |
| } |
| return result; |
| } |
| |
| /** |
| * Change the current working directory for the task |
| */ |
| int chdir(char * new_dir) |
| { |
| file_t *shared_file = file_connect(); |
| |
| if (shared_file == NULL) { |
| f_err = F_READ_ERROR; |
| return F_READ_ERROR; |
| } |
| memcpy(shared_file->params->fname, new_dir, 30); |
| |
| int retval = send_request(fs_phone, FS_CHDIR, shared_file->params, shared_file->share); |
| if (retval < 0) { |
| f_err = F_READ_ERROR; |
| return F_READ_ERROR; |
| } |
| |
| retval = file_disconnect(shared_file); |
| f_err = F_OK; |
| return F_OK; |
| } |
| |
| /** |
| * Open a file for reading and/or writing |
| */ |
| file_t *fopen(char *name, int mode) |
| { |
| file_t *file = file_connect(); |
| |
| /* We want to work with the specified file. */ |
| memcpy(file->params->fname, name, 30); |
| |
| int retval = send_request(fs_phone, FS_OPEN, file->params, file->share); |
| if (retval < 0) |
| return NULL; |
| |
| file->handle = retval; |
| |
| return file; |
| } |
| |
| /** |
| * Read status information about a file |
| */ |
| int fstat(file_t *file) |
| { |
| memcpy(file->params->fname, file->base_info.name, 30); |
| file->params->fd = file->handle; |
| |
| int retval = send_request(fs_phone, FS_FSTAT, file->params, file->share); |
| if (retval < 0) |
| return -1; |
| |
| memcpy((void *)(&file->stat), file->share, sizeof(stat_t)); |
| |
| f_err = F_OK; |
| return F_OK; |
| } |
| |
| /** |
| * Read data from a file |
| */ |
| int fread(file_t *file, void* buffer, unsigned int size) |
| { |
| file->params->nbytes = size; |
| |
| int retval = send_request(fs_phone, FS_READ, file->params, file->share); |
| if (retval < 0) |
| return -1; |
| |
| f_err = F_OK; |
| return F_OK; |
| } |
| |
| /** |
| * Seek to a position within a file |
| */ |
| int fseek(file_t *file, int offset, int whence) |
| { |
| file->params->offset = 0; |
| file->params->whence = 0; /* from beginning of the file */ |
| |
| int retval = send_request(fs_phone, FS_SEEK, file->params, file->share); |
| if (retval < 0) |
| return -1; |
| |
| f_err = F_OK; |
| return F_OK; |
| } |
| |
| /** |
| * Close a file |
| */ |
| int fclose(file_t *file) |
| { |
| int retval = send_request(fs_phone, FS_CLOSE, file->params, file->share); |
| if (retval < 0) |
| return -1; |
| |
| if (file != NULL) |
| file_disconnect(file); |
| |
| f_err = F_OK; |
| return F_OK; |
| } |
| |
| /** |
| *@} |
| */ |