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belauncher: Prepend install path for game_exe starting with backslash. #331

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belauncher: Prepend install path for game_exe starting with backslash. #331

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belauncher: Prepend install path for game_exe starting with backslash.
PhialsBasement May 24, 2026
9ae9124
belauncher: Fix handling of leading backslash in game executable path
PhialsBasement May 24, 2026
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9 changes: 9 additions & 0 deletions programs/belauncher/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -169,6 +169,15 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPWSTR cmdline, int cm
battleye_status = 0x9; /* Launching Game */
_write(1, &battleye_status, 1);

/* Windows BattlEye treats a singleton leading-backslash 64BitExe as
* install-relative; strip it so the joined launch_cmd doesn't end up
* with a doubled separator. Skip if a second '\' follows so UNC paths
* are preserved. */
if (game_exeW[0] == L'\\' && game_exeW[1] != L'\\')
{
memmove(game_exeW, game_exeW + 1, game_exe_len * sizeof(*game_exeW));
--game_exe_len;
}
if (PathIsRelativeW(game_exeW))
path_len = wcslen(path);
else
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