int sandbox_fs_exists(const char *filename)
{
loff_t size;
int ret;
ret = os_get_filesize(filename, &size);
return ret == 0;
}
static int sandbox_flash_probe(struct udevice *dev)
{
struct sandbox_flash_plat *plat = dev_get_platdata(dev);
struct sandbox_flash_priv *priv = dev_get_priv(dev);
priv->fd = os_open(plat->pathname, OS_O_RDONLY);
if (priv->fd != -1)
return os_get_filesize(plat->pathname, &priv->file_size);
return 0;
}
long sandbox_fs_read_at(const char *filename, unsigned long pos,
void *buffer, unsigned long maxsize)
{
ssize_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)
maxsize = os_get_filesize(filename);
size = os_read(fd, buffer, maxsize);
os_close(fd);
return size;
}
int sandbox_read_fdt_from_file(void)
{
struct sandbox_state *state = state_get_current();
const char *fname = state->fdt_fname;
void *blob;
loff_t size;
int err;
int fd;
blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0);
if (!state->fdt_fname) {
err = fdt_create_empty_tree(blob, 256);
if (!err)
goto done;
printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
return -EINVAL;
}
err = os_get_filesize(fname, &size);
if (err < 0) {
printf("Failed to file FDT file '%s'\n", fname);
return err;
}
fd = os_open(fname, OS_O_RDONLY);
if (fd < 0) {
printf("Failed to open FDT file '%s'\n", fname);
return -EACCES;
}
if (os_read(fd, blob, size) != size) {
os_close(fd);
return -EIO;
}
os_close(fd);
done:
gd->fdt_blob = blob;
return 0;
}
int os_read_ram_buf(const char *fname)
{
struct sandbox_state *state = state_get_current();
int fd, ret;
loff_t size;
ret = os_get_filesize(fname, &size);
if (ret < 0)
return ret;
if (size != state->ram_size)
return -ENOSPC;
fd = open(fname, O_RDONLY);
if (fd < 0)
return -ENOENT;
ret = read(fd, state->ram_buf, state->ram_size);
close(fd);
if (ret != state->ram_size)
return -EIO;
return 0;
}
static int state_read_file(struct sandbox_state *state, const char *fname)
{
loff_t size;
int ret;
int fd;
ret = os_get_filesize(fname, &size);
if (ret < 0) {
printf("Cannot find sandbox state file '%s'\n", fname);
return ret;
}
state->state_fdt = os_malloc(size);
if (!state->state_fdt) {
puts("No memory to read sandbox state\n");
return -ENOMEM;
}
fd = os_open(fname, OS_O_RDONLY);
if (fd < 0) {
printf("Cannot open sandbox state file '%s'\n", fname);
ret = -EPERM;
goto err_open;
}
if (os_read(fd, state->state_fdt, size) != size) {
printf("Cannot read sandbox state file '%s'\n", fname);
ret = -EIO;
goto err_read;
}
os_close(fd);
return 0;
err_read:
os_close(fd);
err_open:
os_free(state->state_fdt);
state->state_fdt = NULL;
return ret;
}
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_size(const char *filename, loff_t *size)
{
return os_get_filesize(filename, size);
}