/*
- * CU sudo version 1.6
- * Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
+ * Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
+ * All rights reserved.
*
- * 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 1, or (at your option)
- * any later version.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
*
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Please send bugs, changes, problems to sudo-bugs@courtesan.com
- *
- *******************************************************************
- *
- * This module contains tgetpass(), getpass(3) with a timeout.
- * It should work on any OS that supports sgtty (4BSD), termio (SYSV),
- * or termios (POSIX) line disciplines.
- *
- * Todd C. Miller Sun Jun 5 17:22:31 MDT 1994
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#endif /* lint */
-/******************************************************************
- *
- * tgetpass()
- *
- * this function prints a prompt and gets a password from /dev/tty
- * or stdin. Echo is turned off (if possible) during password entry
- * and input will time out based on the value of timeout.
+/*
+ * Like getpass(3) but with timeout and echo flags.
*/
-
char *
tgetpass(prompt, timeout, echo_off)
const char *prompt;
struct sgttyb ttyb;
#endif /* HAVE_TERMIO_H */
#endif /* HAVE_TERMIOS_H */
-#ifdef POSIX_SIGNALS
- sigset_t set, oset;
-#else
- int omask;
-#endif /* POSIX_SIGNALS */
int n, input, output;
static char buf[SUDO_PASS_MAX + 1];
fd_set *readfds;
struct timeval tv;
- /*
- * mask out SIGINT and SIGTSTP, should probably just catch and deal.
- */
-#ifdef POSIX_SIGNALS
- (void) sigemptyset(&set);
- (void) sigaddset(&set, SIGINT);
- (void) sigaddset(&set, SIGTSTP);
- (void) sigprocmask(SIG_BLOCK, &set, &oset);
-#else
- omask = sigblock(sigmask(SIGINT)|sigmask(SIGTSTP));
-#endif /* POSIX_SIGNALS */
-
- /*
- * open /dev/tty for reading/writing if possible or use
- * stdin and stderr instead.
- */
+ /* Open /dev/tty for reading/writing if possible else use stdin/stderr. */
if ((input = output = open(_PATH_TTY, O_RDWR)) == -1) {
input = STDIN_FILENO;
output = STDERR_FILENO;
}
- /* print the prompt */
if (prompt)
(void) write(output, prompt, strlen(prompt) + 1);
- /*
- * turn off echo unless asked to keep it on
- */
if (echo_off) {
#ifdef HAVE_TERMIOS_H
(void) tcgetattr(input, &term);
}
/*
- * Timeout of <= 0 means no timeout
+ * Timeout of <= 0 means no timeout.
*/
if (timeout > 0) {
/* setup for select(2) */
tv.tv_usec = 0;
/*
- * get password or return empty string if nothing to read by timeout
+ * Get password or return empty string if nothing to read by timeout
*/
buf[0] = '\0';
while ((n = select(input + 1, readfds, 0, 0, &tv)) == -1 &&
}
}
- /* turn on echo if we turned it off above */
#ifdef HAVE_TERMIOS_H
if (echo_off) {
term.c_lflag |= ECHO;
#endif /* HAVE_TERMIO_H */
#endif /* HAVE_TERMIOS_H */
- /* print a newline since echo is turned off */
if (echo_off)
(void) write(output, "\n", 1);
- /* restore old signal mask */
-#ifdef POSIX_SIGNALS
- (void) sigprocmask(SIG_SETMASK, &oset, NULL);
-#else
- (void) sigsetmask(omask);
-#endif /* POSIX_SIGNALS */
-
- /* close /dev/tty if that's what we opened */
if (input != STDIN_FILENO)
(void) close(input);