Re: mintty and Control-` , Control-~

[Ryan Johnson <ryan dot johnson at cs dot utoronto dot ca>]

On 21/03/2013 11:30 AM, Igor Bukanov wrote:
> It seems that mintty in Cygwin under Windows-7 does not pass C-`
> (Control-backtick, in US keyboard this is the key above the tab) nor
> C-~ (or Control-Shift-backtick) to terminal applications. Any reason
> for that?
A quick test [3] in shortcut override mode [1] suggests that mintty 
never receives that key combination in the first place.

However, trying the same test in xterm, I get \000 and \036 for C-` and 
C-~, respectively. Neither of those seems to be correct [2] (\000 is ^@ 
and \036 is ^^), but it's still odd that xterm can receive key codes 
that mintty misses.

Maybe someone who knows more about terminals and key mappings can comment?

Ryan

[1] http://code.google.com/p/mintty/wiki/CtrlSeqs#Shortcut_override_mode
[2] http://en.wikipedia.org/wiki/ASCII#ASCII_control_code_chart
[3] $ cat echo-octets.c
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
int main(int argc, char const* argv[]) {
    unsigned char c;
    while(1 == read(0, &c, 1)) {
        if(isprint(c) && !isspace(c))
            fprintf(stderr, "   %c ", c);
        else
            fprintf(stderr, "\\%03o ", (int) c);
        if(c == '\n') fprintf(stderr, "%c", c);
    }
    return 0;
}


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