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Except silentoldconfig, valid_stdin is 1, so check_stdin() is no-op. oldconfig and silentoldconfig work almost in the same way except that the latter generates additional files under include/. Both ask users for input for new symbols. I do not know why only silentoldconfig requires stdio be tty. $ rm -f .config; touch .config $ yes "" | make oldconfig > stdout $ rm -f .config; touch .config $ yes "" | make silentoldconfig > stdout make[1]: *** [silentoldconfig] Error 1 make: *** [silentoldconfig] Error 2 $ tail -n 4 stdout Console input/output is redirected. Run 'make oldconfig' to update configuration. scripts/kconfig/Makefile:40: recipe for target 'silentoldconfig' failed Makefile:507: recipe for target 'silentoldconfig' failed Redirection is useful, for example, for testing where we want to give particular key inputs from a test file, then check the result. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.