Hi Stefan,
2015-05-07 21:13 GMT+09:00 Stefan Roese sr@denx.de:
I might have missed something, but I failed to use the escape char '' in strings. To pass a printf format string like "foo %d bar\n" via Kconfig to the code.
Right now its not possible to use the escape character '' in Kconfig string values correctly to e.g. set this string value "test output\n". The '\n' will be converted to 'n'.
The current implementation removes some of the '' chars from the input string in conf_set_sym_val(). Examples:
'' -> '' '\' -> '' '\' -> '' '\\' -> '\' ...
And then doubles the backslash chars in the output string in sym_escape_string_value(). Example:
'' -> '' -> '' '\' -> '' -> '\' '\' -> '' -> '\' '\\' -> '\' -> '\\' ...
As you see in these examples, its impossible to generate a single '' charater in the output string as its needed for something like '\n'.
This patch now changes this behavior to not drop some backslashes in conf_set_sym_val() and to not add new backslashes in the resulting output string. Removing the function sym_escape_string_value() completely as its not needed anymore.
Interesting. I did not know this behavior of strings in Kconfig.
I want to see the reaction from linux-kconfig ML.