u-boot/fs/sandbox/sandboxfs.c
Simon Glass 7eb2c8d573 sandbox: fs: Add support for saving files to host filesystem
This allows write of files from the host filesystem in sandbox. There is
currently no concept of overwriting the file and removing its existing
contents - all writing is done on top of what is there. This means that
writing 10 bytes to the start of a 1KB file will only update those 10
bytes, not truncate the file to 10 byte slong.

If the file does not exist it is created.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-05-01 11:17:21 -04:00

116 lines
2.5 KiB
C

/*
* Copyright (c) 2012, Google Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <fs.h>
#include <os.h>
int sandbox_fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
{
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;
}
long sandbox_fs_write_at(const char *filename, unsigned long pos,
void *buffer, unsigned long towrite)
{
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);
return size;
}
int sandbox_fs_ls(const char *dirname)
{
struct os_dirent_node *head, *node;
int ret;
ret = os_dirent_ls(dirname, &head);
if (ret)
return ret;
for (node = head; node; node = node->next) {
printf("%s %10lu %s\n", os_dirent_get_typename(node->type),
node->size, node->name);
}
return 0;
}
void sandbox_fs_close(void)
{
}
int fs_read_sandbox(const char *filename, void *buf, int offset, int len)
{
int len_read;
len_read = sandbox_fs_read_at(filename, offset, buf, len);
if (len_read == -1) {
printf("** Unable to read file %s **\n", filename);
return -1;
}
return len_read;
}
int fs_write_sandbox(const char *filename, void *buf, int offset, int len)
{
int len_written;
len_written = sandbox_fs_write_at(filename, offset, buf, len);
if (len_written == -1) {
printf("** Unable to write file %s **\n", filename);
return -1;
}
return len_written;
}