mingw: reuse tty-version of git_terminal_prompt

The getpass-implementation we use on Windows isn't at all ideal;
it works in raw-mode (as opposed to cooked mode), and as a result
does not deal correcly with deletion, arrow-keys etc.

Instead, use cooked mode to read a line at the time, allowing the
C run-time to process the input properly.

Since we set files to be opened in binary-mode by default on
Windows, introduce a FORCE_TEXT macro that expands to the "t"
modifier that forces the terminal to be opened in text-mode so we
do not have to deal with CRLF issues.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/compat/terminal.c b/compat/terminal.c
index 9aecad68a04817efc4410846a8bcb58c262765d4..9b5e3d1bb8fe0adafb78721c09caff5b165dbf40 100644 (file)
--- a/compat/terminal.c
+++ b/compat/terminal.c
@@ -3,8 +3,22 @@
 #include "sigchain.h"
 #include "strbuf.h"
 
+#if defined(HAVE_DEV_TTY) || defined(WIN32)
+
+static void restore_term(void);
+
+static void restore_term_on_signal(int sig)
+{
+       restore_term();
+       sigchain_pop(sig);
+       raise(sig);
+}
+
 #ifdef HAVE_DEV_TTY
 
+#define INPUT_PATH "/dev/tty"
+#define OUTPUT_PATH "/dev/tty"
+
 static int term_fd = -1;
 static struct termios old_term;
 
@@ -18,13 +32,6 @@ static void restore_term(void)
        term_fd = -1;
 }
 
-static void restore_term_on_signal(int sig)
-{
-       restore_term();
-       sigchain_pop(sig);
-       raise(sig);
-}
-
 static int disable_echo(void)
 {
        struct termios t;
@@ -46,17 +53,61 @@ error:
        return -1;
 }
 
+#elif defined(WIN32)
+
+#define INPUT_PATH "CONIN$"
+#define OUTPUT_PATH "CONOUT$"
+#define FORCE_TEXT "t"
+
+static HANDLE hconin = INVALID_HANDLE_VALUE;
+static DWORD cmode;
+
+static void restore_term(void)
+{
+       if (hconin == INVALID_HANDLE_VALUE)
+               return;
+
+       SetConsoleMode(hconin, cmode);
+       CloseHandle(hconin);
+       hconin = INVALID_HANDLE_VALUE;
+}
+
+static int disable_echo(void)
+{
+       hconin = CreateFile("CONIN$", GENERIC_READ | GENERIC_WRITE,
+           FILE_SHARE_READ, NULL, OPEN_EXISTING,
+           FILE_ATTRIBUTE_NORMAL, NULL);
+       if (hconin == INVALID_HANDLE_VALUE)
+               return -1;
+
+       GetConsoleMode(hconin, &cmode);
+       sigchain_push_common(restore_term_on_signal);
+       if (!SetConsoleMode(hconin, cmode & (~ENABLE_ECHO_INPUT))) {
+               CloseHandle(hconin);
+               hconin = INVALID_HANDLE_VALUE;
+               return -1;
+       }
+
+       return 0;
+}
+
+#endif
+
+#ifndef FORCE_TEXT
+#define FORCE_TEXT
+#endif
+
 char *git_terminal_prompt(const char *prompt, int echo)
 {
        static struct strbuf buf = STRBUF_INIT;
        int r;
        FILE *input_fh, *output_fh;
 
-       input_fh = fopen("/dev/tty", "r");
+       input_fh = fopen(INPUT_PATH, "r" FORCE_TEXT);
        if (!input_fh)
                return NULL;
 
-       output_fh = fopen("/dev/tty", "w");
+       output_fh = fopen(OUTPUT_PATH, "w" FORCE_TEXT);
        if (!output_fh) {
                fclose(input_fh);
                return NULL;