From 6f9a7783ce2f3ffae28176f8bcfcd6b86c1b41b3 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Sat, 1 May 2004 01:27:30 +0000 Subject: Do not use getpass(3) --- libbb/bb_askpass.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 libbb/bb_askpass.c (limited to 'libbb/bb_askpass.c') diff --git a/libbb/bb_askpass.c b/libbb/bb_askpass.c new file mode 100644 index 000000000..1ae1520d9 --- /dev/null +++ b/libbb/bb_askpass.c @@ -0,0 +1,87 @@ +/* vi: set sw=4 ts=4: */ +/* + * Ask for a password + * I use a static buffer in this function. Plan accordingly. + * + * Copyright (C) 1999-2004 by Erik Andersen + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#define PWD_BUFFER_SIZE 256 + + +/* do nothing signal handler */ +static void askpass_timeout(int ignore) +{ +} + +char *bb_askpass(int timeout, const char * prompt) +{ + char *ret; + int i, size; + struct sigaction sa; + struct termios old, new; + static char passwd[PWD_BUFFER_SIZE]; + + tcgetattr(STDIN_FILENO, &old); + + size = sizeof(passwd); + ret = passwd; + memset(passwd, 0, size); + + fputs(prompt, stdout); + fflush(stdout); + + tcgetattr(STDIN_FILENO, &new); + new.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY); + new.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP); + tcsetattr(STDIN_FILENO, TCSANOW, &new); + + if (timeout) { + sa.sa_flags = 0; + sa.sa_handler = askpass_timeout; + sigaction(SIGALRM, &sa, NULL); + alarm(timeout); + } + + if (read(STDIN_FILENO, passwd, size-1) <= 0) { + ret = NULL; + } else { + for(i = 0; i < size && passwd[i]; i++) { + if (passwd[i]== '\r' || passwd[i] == '\n') { + passwd[i]= 0; + break; + } + } + } + + if (timeout) { + alarm(0); + } + + tcsetattr(STDIN_FILENO, TCSANOW, &old); + fputs("\n", stdout); + fflush(stdout); + return ret; +} + -- cgit v1.2.3