GerbilSoft/hack-detection
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Print "*** HACK DETECTION ***" in color on Windows.

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Includes some hacks to prevent extra lines from being printed if we're at
the end of the screen buffer. Tested on Windows XP.
This commit is contained in:
David Korth 2017-07-07 21:50:49 -04:00
parent da864a04db
commit e6efd8280f
1 changed files with 52 additions and 6 deletions
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58
hack-detection.c
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@ -47,6 +47,11 @@
#ifdef _WIN32
#include <io.h>
// Windows headers are needed for console attributes.
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#define FOREGROUND_WHITE (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE)
#define FOREGROUND_YELLOW (FOREGROUND_RED | FOREGROUND_GREEN)
#else /* !_WIN32 */
#include <sys/ioctl.h>
#include <unistd.h>
@ -107,6 +112,14 @@ static int is_a_tty(void)
*/
static void print_hack_detection(void)
{
int lbside, rbside;
#ifdef _WIN32
// Needed because MSVC prior to 2015 doesn't support C99.
HANDLE hStdOut;
CONSOLE_SCREEN_BUFFER_INFO csbi;
WORD old_color_attrs;
#endif /* _WIN32 */
// Is this a TTY?
if (!is_a_tty()) {
// Not a TTY. Print a generic banner.
@ -115,9 +128,39 @@ static void print_hack_detection(void)
}
#ifdef _WIN32
// TODO: Win32 console.
_tprintf(_T("*** HACK DETECTION ***\n"));
return;
// Get the window size.
hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
if (!hStdOut || hStdOut == INVALID_HANDLE_VALUE ||
!GetConsoleScreenBufferInfo(hStdOut, &csbi) ||
csbi.dwSize.X < 4 || csbi.dwSize.Y < 24)
{
// Failed to get the console screen buffer info.
// Print a generic banner.
_tprintf(_T("*** HACK DETECTION ***\n"));
}
// Print "*** HACK DETECTION ***".
// - Background: Dark green
// - Asterisks: Bright white
// - Text: Bright yellow
old_color_attrs = csbi.wAttributes;
lbside = (csbi.dwSize.X - 22) / 2;
rbside = lbside + (csbi.dwSize.X % 2);
SetConsoleTextAttribute(hStdOut, BACKGROUND_GREEN | FOREGROUND_WHITE | FOREGROUND_INTENSITY);
_tprintf(_T("%*s%*s*** "), csbi.dwSize.X, "", lbside, "");
SetConsoleTextAttribute(hStdOut, BACKGROUND_GREEN | FOREGROUND_YELLOW | FOREGROUND_INTENSITY);
_tprintf(_T("HACK DETECTION"));
SetConsoleTextAttribute(hStdOut, BACKGROUND_GREEN | FOREGROUND_WHITE | FOREGROUND_INTENSITY);
// NOTE: If printing past the end of the console buffer, we have to
// subtract 1 from csbi.dwSize.X in order to not print an extra line
// with a green background.
if (GetConsoleScreenBufferInfo(hStdOut, &csbi) &&
(csbi.dwCursorPosition.Y + 1) >= csbi.dwSize.Y)
{
csbi.dwSize.X--;
}
_tprintf(_T(" ***%*s%*s"), rbside, "", csbi.dwSize.X, "");
SetConsoleTextAttribute(hStdOut, old_color_attrs);
#else /* !_WIN32 */
// Linux terminal. Use ANSI escape sequences.
@ -133,9 +176,12 @@ static void print_hack_detection(void)
return;
}
// Print a line with a green background.
const int lbside = (sz.ws_col - 22) / 2;
const int rbside = lbside + (sz.ws_col % 2);
// Print "*** HACK DETECTION ***".
// - Background: Dark green
// - Asterisks: Bright white
// - Text: Bright yellow
lbside = (sz.ws_col - 22) / 2;
rbside = lbside + (sz.ws_col % 2);
_tprintf(_T("\x1B[0m")
_T("\x1B[37;1m\x1B[42m%*s")
_T("%*s*** \x1B[33;1mHACK DETECTION\x1B[37;1m ***%*s")