Per #708.
This patch allows escaped characters in the shell, and makes the
apostrophe a quotation mark. The escape character is backslash.
The term "escape character" is used liberally in here: if a backslash is
encountered in the command line, the next character will be taken
verbatim. No escape sequences are understood, i.e. `"\n"` is just the
letter `n`, not a new line.
Compare #708.
Now the tokenization of an input line is done by the shell itself. You
may quote arguments with `"..."`. Empty arguments, supplied by `""` are
preserved. Spaces in between arguments are squasheds; spaces inside
quotes are preserved.
You cannot partially quote an argument. You must not use
- `cmd "abc`,
- `cmd abc"def"`, or
- `cmd "abc"def`.
before, we actually duplicated code for handling of shell commands
supplied to shell_init and those hardcoded by MODULE_SHELL_COMMANDS.
This patch refactors shell.c find_handler and print_help so there's
no duplicated code.
* increased main priority to the half of maximum priority
* introduced define for minimum stack size
* decreased stack size for uart0 thread
* merged commands for rtc shell module to one command (date)
* cleanup of header includes
* added drivers directory to doxygen file
* added missing include to sht11 header
* added rtc and sht11 support to default project
* added rtc to auto_init
* added rtc and sht11 support to shell
