1 /* vi: set sw=4 ts=4: */
4 * I use a static buffer in this function. Plan accordingly.
6 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
13 /* do nothing signal handler */
14 static void askpass_timeout(int UNUSED_PARAM ignore)
18 char* FAST_FUNC bb_ask_stdin(const char *prompt)
20 return bb_ask(STDIN_FILENO, 0, prompt);
22 char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
24 /* Was static char[BIGNUM] */
25 enum { sizeof_passwd = 128 };
30 struct sigaction sa, oldsa;
31 struct termios tio, oldtio;
33 tcgetattr(fd, &oldtio);
34 tcflush(fd, TCIFLUSH);
39 tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
40 tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
41 tcsetattr(fd, TCSANOW, &tio);
43 memset(&sa, 0, sizeof(sa));
44 /* sa.sa_flags = 0; - no SA_RESTART! */
45 /* SIGINT and SIGALRM will interrupt reads below */
46 sa.sa_handler = askpass_timeout;
47 sigaction(SIGINT, &sa, &oldsa);
49 sigaction_set(SIGALRM, &sa);
53 fputs(prompt, stdout);
57 passwd = xmalloc(sizeof_passwd);
61 int r = read(fd, &ret[i], 1);
63 /* read is interrupted by timeout or ^C */
68 || ret[i] == '\r' || ret[i] == '\n' /* EOL */
69 || ++i == sizeof_passwd-1 /* line limit */
79 sigaction_set(SIGINT, &oldsa);
80 tcsetattr(fd, TCSANOW, &oldtio);