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cmd/fat: Do not crash on write when <bytes> is not specified

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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>
This commit is contained in:
Stefan Brüns 2016-09-11 22:51:42 +02:00 committed by Tom Rini
parent ae1755be37
commit 454e3d9030
1 changed files with 2 additions and 2 deletions
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4
cmd/fat.c
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@ -126,7 +126,7 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
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 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
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'"
);