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/* Copyright (c) 2006-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "buffer.h"
#include "str.h"
#include "askpass.h"
#include <stdio.h>
#include <termios.h>
#include <fcntl.h>
#include <unistd.h>
static void askpass_str(const char *prompt, buffer_t *pass)
{
struct termios old_tio, tio;
bool tty, restore_tio = FALSE;
char ch;
int fd;
tty = isatty(STDIN_FILENO) != 0;
if (tty) {
fputs(prompt, stderr);
fflush(stderr);
fd = open("/dev/tty", O_RDONLY);
if (fd < 0)
i_fatal("open(/dev/tty) failed: %m");
/* turn off echo */
if (tcgetattr(fd, &old_tio) == 0) {
restore_tio = TRUE;
tio = old_tio;
tio.c_lflag &= ENUM_NEGATE(ECHO | ECHONL);
(void)tcsetattr(fd, TCSAFLUSH, &tio);
}
} else {
/* read it from stdin without showing a prompt */
fd = STDIN_FILENO;
}
/* read the password */
while (read(fd, &ch, 1) > 0) {
if (ch == '\n' || ch == '\r')
break;
buffer_append_c(pass, ch);
}
if (tty) {
if (restore_tio)
(void)tcsetattr(fd, TCSAFLUSH, &old_tio);
fputs("\n", stderr); fflush(stderr);
i_close_fd(&fd);
}
}
void askpass(const char *prompt, char *buf, size_t buf_size)
{
buffer_t str;
buffer_create_from_data(&str, buf, buf_size);
askpass_str(prompt, &str);
buffer_append_c(&str, '\0');
}
const char *t_askpass(const char *prompt)
{
string_t *str = t_str_new(32);
askpass_str(prompt, str);
return str_c(str);
}
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