diff options
| author | Brandon Maier <brandon.maier@collins.com> | 2022-12-12 12:01:58 -0600 |
|---|---|---|
| committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2023-05-30 11:12:12 +0200 |
| commit | 730148bc94411f13a0171204e872b0760fbde185 (patch) | |
| tree | 8b07dd5ef274c0e4e36944f4ef6929399a77e56f /misc-utils/flash_unlock.c | |
| parent | a527b22f0a30d66d4674624d16f4bb0ffe2e94d0 (diff) | |
mtd-utils: Add new syntax to get devices by name
This introduces a new feature to the MTD command line utilities that
allows MTD devices to be referenced by name instead of device node. For
example this looks like:
> # Display info for the MTD device with name "data"
> mtdinfo mtd:data
> # Copy file to MTD device with name "data"
> flashcp /my/file mtd:data
This follows the syntax supported by the kernel which allows MTD
device's to be mounted by name[1].
Add the function mtd_find_dev_node() that accepts an MTD "identifier"
and returns the MTD's device node. The function accepts a string
starting with "mtd:" which it treats as the MTD's name. It then attempts
to search for the MTD, and if found maps it back to the /dev/mtdX device
node. If the string does not start with "mtd:", then assume it's the old
style and refers directly to a MTD device node.
The function is then hooked into existing tools like flashcp, mtdinfo,
flash_unlock, etc. To load in the new MTD parsing code in a consistent
way across programs.
[1] http://www.linux-mtd.infradead.org/faq/jffs2.html#L_mtdblock
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'misc-utils/flash_unlock.c')
| -rw-r--r-- | misc-utils/flash_unlock.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/misc-utils/flash_unlock.c b/misc-utils/flash_unlock.c index fbbfa51..fa5decb 100644 --- a/misc-utils/flash_unlock.c +++ b/misc-utils/flash_unlock.c @@ -51,6 +51,8 @@ static NORETURN void usage(int status) " -l --lock Lock a region of flash\n" " -u --unlock Unlock a region of flash\n" "\n" + " <mtd device> MTD device node or 'mtd:<name>'\n" + "\n" "If offset is not specified, it defaults to 0.\n" "If block count is not specified, it defaults to all blocks.\n" "A block count of -1 means all blocks.\n", @@ -125,7 +127,12 @@ static void process_args(int argc, char *argv[]) } /* First non-option argument */ - dev = argv[arg_idx++]; + dev = mtd_find_dev_node(argv[arg_idx]); + if (!dev) { + errmsg("MTD device not found %s", argv[arg_idx]); + usage(EXIT_FAILURE); + } + arg_idx++; /* Second non-option argument */ if (arg_idx < argc) |