Demonstration of cmd.exe escaping rules

runme.cmd

@cmd.exe /s /c "x.cmd ^ ^"
@cmd.exe /s /c "x.cmd ^^ ^^"
@cmd.exe /s /c "x.cmd ^^^ ^^^"
@cmd.exe /s /c "x.cmd ^^^^ ^^^^"
@cmd.exe /s /c "x.cmd ^^^^^ ^^^^^"
@cmd.exe /s /c "x.cmd ^^^^^^ ^^^^^^"
@cmd.exe /s /c "x.cmd ^^^^^^^ ^^^^^^^"
@cmd.exe /s /c "x.cmd ^^^^^^^^ ^^^^^^^^"
@echo.
@cmd.exe /s /c "x.cmd "^" "^""
@cmd.exe /s /c "x.cmd "^^" "^^""
@cmd.exe /s /c "x.cmd "^^^" "^^^""
@cmd.exe /s /c "x.cmd "^^^^" "^^^^""
@cmd.exe /s /c "x.cmd "^^^^^" "^^^^^""
@cmd.exe /s /c "x.cmd "^^^^^^" "^^^^^^""
@cmd.exe /s /c "x.cmd "^^^^^^^" "^^^^^^^""
@cmd.exe /s /c "x.cmd "^^^^^^^^" "^^^^^^^^""

x.cmd

@call y.bat "%*"

y.cmd

@z.exe %*

z.cpp

#include <cstdio>
#include <windows.h>
int main(int argc, char* argv[]) {
  printf("%30s; %d;", GetCommandLine(), argc);
  for (int i = 1; i < argc; i++)
    printf(" %20s;", argv[i]);
  printf("\n");
  return 0;
}