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 --- Changes in v3: None Changes in v2: None
common/cmd_sandbox.c | 18 ++++++++++++++---- fs/fs.c | 1 + fs/sandbox/sandboxfs.c | 33 +++++++++++++++++++++++++++++++++ include/sandboxfs.h | 1 + 4 files changed, 49 insertions(+), 4 deletions(-)
diff --git a/common/cmd_sandbox.c b/common/cmd_sandbox.c index 206a486..a28a844 100644 --- a/common/cmd_sandbox.c +++ b/common/cmd_sandbox.c @@ -32,9 +32,16 @@ static int do_sandbox_ls(cmd_tbl_t *cmdtp, int flag, int argc, return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX); }
+static int do_sandbox_save(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + return do_save(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX, 16); +} + static cmd_tbl_t cmd_sandbox_sub[] = { - U_BOOT_CMD_MKENT(load, 3, 0, do_sandbox_load, "", ""), + U_BOOT_CMD_MKENT(load, 7, 0, do_sandbox_load, "", ""), U_BOOT_CMD_MKENT(ls, 3, 0, do_sandbox_ls, "", ""), + U_BOOT_CMD_MKENT(save, 6, 0, do_sandbox_save, "", ""), };
static int do_sandbox(cmd_tbl_t *cmdtp, int flag, int argc, @@ -56,8 +63,11 @@ static int do_sandbox(cmd_tbl_t *cmdtp, int flag, int argc, }
U_BOOT_CMD( - sb, 6, 1, do_sandbox, + sb, 8, 1, do_sandbox, "Miscellaneous sandbox commands", - "load host <addr> <filename> [<bytes> <offset>] - load a file from host\n" - "sb ls host <filename> - save a file to host" + "load host <dev> <addr> <filename> [<bytes> <offset>] - " + "load a file from host\n" + "sb ls host <filename> - list files on host\n" + "sb save host <dev> <filename> <addr> <bytes> [<offset>] - " + "save a file to host\n" ); diff --git a/fs/fs.c b/fs/fs.c index eee7e23..99e516a 100644 --- a/fs/fs.c +++ b/fs/fs.c @@ -93,6 +93,7 @@ static struct fstype_info fstypes[] = { .close = sandbox_fs_close, .ls = sandbox_fs_ls, .read = fs_read_sandbox, + .write = fs_write_sandbox, }, #endif { diff --git a/fs/sandbox/sandboxfs.c b/fs/sandbox/sandboxfs.c index 02d26ff..89769e8 100644 --- a/fs/sandbox/sandboxfs.c +++ b/fs/sandbox/sandboxfs.c @@ -48,6 +48,26 @@ long sandbox_fs_read_at(const char *filename, unsigned long pos, 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; @@ -81,3 +101,16 @@ int fs_read_sandbox(const char *filename, void *buf, int offset, int len)
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; +} diff --git a/include/sandboxfs.h b/include/sandboxfs.h index f5213ac..8ea8cb7 100644 --- a/include/sandboxfs.h +++ b/include/sandboxfs.h @@ -26,5 +26,6 @@ long sandbox_fs_read_at(const char *filename, unsigned long pos, void sandbox_fs_close(void); int sandbox_fs_ls(const char *dirname); int fs_read_sandbox(const char *filename, void *buf, int offset, int len); +int fs_write_sandbox(const char *filename, void *buf, int offset, int len);
#endif