cmd/fat: Do not crash on write when <bytes> is not specified
argc is checked, but is off by one. In case <bytes> is not specified,
create an empty file, which is identical to the ext4write behaviour.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/fat.c b/cmd/fat.c
index 4e20746..ad1dc2a 100644
--- a/cmd/fat.c
+++ b/cmd/fat.c
@@ -126,7 +126,7 @@
return 1;
}
addr = simple_strtoul(argv[3], NULL, 16);
- count = simple_strtoul(argv[5], NULL, 16);
+ count = (argc <= 5) ? 0 : simple_strtoul(argv[5], NULL, 16);
buf = map_sysmem(addr, count);
ret = file_fat_write(argv[4], buf, 0, count, &size);
@@ -145,7 +145,7 @@
U_BOOT_CMD(
fatwrite, 6, 0, do_fat_fswrite,
"write file into a dos filesystem",
- "<interface> <dev[:part]> <addr> <filename> <bytes>\n"
+ "<interface> <dev[:part]> <addr> <filename> [<bytes>]\n"
" - write file 'filename' from the address 'addr' in RAM\n"
" to 'dev' on 'interface'"
);