The program would failed if nvram magic not found
in specific partition.
Signed-off-by: BangLang Huang <banglang.huang@foxmail.com>
(cherry picked from commit 69da83d9f1)
print help message when argument count is less
than 2.
Signed-off-by: BangLang Huang <banglang.huang@foxmail.com>
(cherry picked from commit c7e2a6fe92)
Merge the help message into a single function,
so that we can use it somewhere else.
Signed-off-by: BangLang Huang <banglang.huang@foxmail.com>
(cherry picked from commit 2a253e7cdb)
Fix memory leak on nvram_open() and nvram_open_rdonly().
For nvram_open(), the 'fd' should be closed on error, and
mmap_area should be unmap when nvram magic can not be found.
For nvram_open_rdonly(), the 'file' variable should free before
return. Once nvram_find_mtd() return successfully, it will allocate
memory to save mtd device string.
Signed-off-by: BangLang Huang <banglang.huang@foxmail.com>
(cherry picked from commit 1948d8e08c)
BangLang Huang