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fs/sandbox/sandboxfs.c
2.45 KB
d41ce506b Initial Release, ... |
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/* * Copyright (c) 2012, Google Inc. * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <fs.h> #include <os.h> int sandbox_fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info) { /* * Only accept a NULL struct blk_desc for the sandbox, which is when * hostfs interface is used */ return rbdd != NULL; } int sandbox_fs_read_at(const char *filename, loff_t pos, void *buffer, loff_t maxsize, loff_t *actread) { loff_t size; int fd, ret; fd = os_open(filename, OS_O_RDONLY); if (fd < 0) return fd; ret = os_lseek(fd, pos, OS_SEEK_SET); if (ret == -1) { os_close(fd); return ret; } if (!maxsize) { ret = os_get_filesize(filename, &size); if (ret) { os_close(fd); return ret; } maxsize = size; } size = os_read(fd, buffer, maxsize); os_close(fd); if (size < 0) { ret = -1; } else { ret = 0; *actread = size; } return ret; } int sandbox_fs_write_at(const char *filename, loff_t pos, void *buffer, loff_t towrite, loff_t *actwrite) { ssize_t size; int fd, ret; fd = os_open(filename, OS_O_RDWR | OS_O_CREAT); if (fd < 0) return fd; ret = os_lseek(fd, pos, OS_SEEK_SET); if (ret == -1) { os_close(fd); return ret; } size = os_write(fd, buffer, towrite); os_close(fd); if (size == -1) { ret = -1; } else { ret = 0; *actwrite = size; } return ret; } int sandbox_fs_ls(const char *dirname) { struct os_dirent_node *head, *node; int ret; ret = os_dirent_ls(dirname, &head); if (ret) goto out; for (node = head; node; node = node->next) { printf("%s %10lu %s ", os_dirent_get_typename(node->type), node->size, node->name); } out: os_dirent_free(head); return ret; } int sandbox_fs_exists(const char *filename) { loff_t size; int ret; ret = os_get_filesize(filename, &size); return ret == 0; } int sandbox_fs_size(const char *filename, loff_t *size) { return os_get_filesize(filename, size); } void sandbox_fs_close(void) { } int fs_read_sandbox(const char *filename, void *buf, loff_t offset, loff_t len, loff_t *actread) { int ret; ret = sandbox_fs_read_at(filename, offset, buf, len, actread); if (ret) printf("** Unable to read file %s ** ", filename); return ret; } int fs_write_sandbox(const char *filename, void *buf, loff_t offset, loff_t len, loff_t *actwrite) { int ret; ret = sandbox_fs_write_at(filename, offset, buf, len, actwrite); if (ret) printf("** Unable to write file %s ** ", filename); return ret; } |