-static int ask_tty(void) {
- struct termios old_termios, new_termios;
- char passphrase[LINE_MAX];
- FILE *ttyf;
-
- if (!(ttyf = fopen("/dev/tty", "w"))) {
- log_error("Failed to open /dev/tty: %m");
- return -errno;
- }
-
- fputs("\x1B[1m", ttyf);
- fprintf(ttyf, "%s: ", arg_message);
- fputs("\x1B[0m", ttyf);
- fflush(ttyf);
-
- if (tcgetattr(STDIN_FILENO, &old_termios) >= 0) {
-
- new_termios = old_termios;
-
- new_termios.c_lflag &= ~(ICANON|ECHO);
- new_termios.c_cc[VMIN] = 1;
- new_termios.c_cc[VTIME] = 0;
-
- if (tcsetattr(STDIN_FILENO, TCSADRAIN, &new_termios) >= 0) {
- size_t p = 0;
- int r = 0;
-
- for (;;) {
- size_t k;
- char c;
-
- k = fread(&c, 1, 1, stdin);
-
- if (k <= 0) {
- r = -EIO;
- break;
- }
-
- if (c == '\n')
- break;
- else if (c == '\b' || c == 127) {
- if (p > 0) {
- p--;
- fputs("\b \b", ttyf);
- }
- } else {
- passphrase[p++] = c;
- fputc('*', ttyf);
- }
-
- fflush(ttyf);
- }
-
- fputc('\n', ttyf);
- fclose(ttyf);
- tcsetattr(STDIN_FILENO, TCSADRAIN, &old_termios);
-
- if (r < 0)
- return -EIO;
-
- passphrase[p] = 0;
-
- fputs(passphrase, stdout);
- fflush(stdout);
- return 0;
- }
-
- }
-
- fclose(ttyf);
-
- if (!fgets(passphrase, sizeof(passphrase), stdin)) {
- log_error("Failed to read password.");
- return -EIO;
- }
-
- truncate_nl(passphrase);
- fputs(passphrase, stdout);
- fflush(stdout);
-
- return 0;
-}
-