diff options
| -rw-r--r-- | winsup/cygwin/fhandler/termios.cc | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/winsup/cygwin/fhandler/termios.cc b/winsup/cygwin/fhandler/termios.cc index 789ae0179..d106955dc 100644 --- a/winsup/cygwin/fhandler/termios.cc +++ b/winsup/cygwin/fhandler/termios.cc @@ -704,22 +704,20 @@ static bool is_console_app (const WCHAR *filename) { HANDLE h; - const int id_offset = 92; h = CreateFileW (filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL); char buf[1024]; DWORD n; ReadFile (h, buf, sizeof (buf), &n, 0); CloseHandle (h); - char *p = (char *) memmem (buf, n, "PE\0\0", 4); - if (p && p + id_offset < buf + n) - return p[id_offset] == '\003'; /* 02: GUI, 03: console */ - else - { - wchar_t *e = wcsrchr (filename, L'.'); - if (e && (wcscasecmp (e, L".bat") == 0 || wcscasecmp (e, L".cmd") == 0)) - return true; - } + /* The offset of Subsystem is the same for both IMAGE_NT_HEADERS32 and + IMAGE_NT_HEADERS64, so only IMAGE_NT_HEADERS32 is used here. */ + IMAGE_NT_HEADERS32 *p = (IMAGE_NT_HEADERS32 *) memmem (buf, n, "PE\0\0", 4); + if (p && (char *) &p->OptionalHeader.DllCharacteristics <= buf + n) + return p->OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI; + wchar_t *e = wcsrchr (filename, L'.'); + if (e && (wcscasecmp (e, L".bat") == 0 || wcscasecmp (e, L".cmd") == 0)) + return true; return false; } |