[U-Boot] [PATCH 1/3] fs: fix do_fsload() handling of optional arguments
Stephen Warren
swarren at wwwdotorg.org
Tue Oct 30 23:04:17 CET 2012
From: Stephen Warren <swarren at nvidia.com>
Most arguments to the shell command do_fsload() implements are optional.
Fix the minimum argc check to respect that. Cater for the situation
where argv[2] is not provided.
Enhance both do_fsload() and do_ls() to check the maximum number of
arguments too. While this check would typically be implemented via
U_BOOT_CMD()'s max_args parameter, if these functions are called
directly, then that check won't exist.
Finally, alter do_ls() to check (argc >= 4) rather than (argc == 4) so
that if the function is enhanced to allow extra arguments in the future,
this test won't need to be changed at that time.
Signed-off-by: Stephen Warren <swarren at nvidia.com>
---
fs/fs.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/fs/fs.c b/fs/fs.c
index e148a07..f570312 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -258,10 +258,12 @@ int do_fsload(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int len_read;
char buf[12];
- if (argc < 5)
+ if (argc < 2)
+ return CMD_RET_USAGE;
+ if (argc > 7)
return CMD_RET_USAGE;
- if (fs_set_blk_dev(argv[1], argv[2], fstype))
+ if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
return 1;
if (argc >= 4) {
@@ -308,11 +310,13 @@ int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
{
if (argc < 2)
return CMD_RET_USAGE;
+ if (argc > 4)
+ return CMD_RET_USAGE;
if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
return 1;
- if (fs_ls(argc == 4 ? argv[3] : "/"))
+ if (fs_ls(argc >= 4 ? argv[3] : "/"))
return 1;
return 0;
--
1.7.0.4
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