settings: shell: improve reading and writing string values
Make reading and writing string values more flexible:
1. Eliminate the intermediate buffer when saving a string
setting. This needlessly limited the maximum string
length that could be saved using the shell command.
2. Do not add nor assume that a string saved in the settings
includes the null-terminator. The settings subsystem uses
metadata for encoding the value length, so there it is
redundant to also store the null-terminator in flash.
By the way, also make sure the command handlers only return
-EINVAL and -ENOEXEC error codes as documented in the
handler type description.
Signed-off-by: Damian Krolik <damian.krolik@nordicsemi.no>
1 file changed
