git/compat/terminal.c
Erik Faye-Lund afb43561b8 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>
2012-12-04 08:03:08 -08:00

148 lines
2.5 KiB
C

#include "git-compat-util.h"
#include "compat/terminal.h"
#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;
static void restore_term(void)
{
if (term_fd < 0)
return;
tcsetattr(term_fd, TCSAFLUSH, &old_term);
close(term_fd);
term_fd = -1;
}
static int disable_echo(void)
{
struct termios t;
term_fd = open("/dev/tty", O_RDWR);
if (tcgetattr(term_fd, &t) < 0)
goto error;
old_term = t;
sigchain_push_common(restore_term_on_signal);
t.c_lflag &= ~ECHO;
if (!tcsetattr(term_fd, TCSAFLUSH, &t))
return 0;
error:
close(term_fd);
term_fd = -1;
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(INPUT_PATH, "r" FORCE_TEXT);
if (!input_fh)
return NULL;
output_fh = fopen(OUTPUT_PATH, "w" FORCE_TEXT);
if (!output_fh) {
fclose(input_fh);
return NULL;
}
if (!echo && disable_echo()) {
fclose(input_fh);
fclose(output_fh);
return NULL;
}
fputs(prompt, output_fh);
fflush(output_fh);
r = strbuf_getline(&buf, input_fh, '\n');
if (!echo) {
putc('\n', output_fh);
fflush(output_fh);
}
restore_term();
fclose(input_fh);
fclose(output_fh);
if (r == EOF)
return NULL;
return buf.buf;
}
#else
char *git_terminal_prompt(const char *prompt, int echo)
{
return getpass(prompt);
}
#endif