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/* GNU mailutils - a suite of utilities for electronic mail |
/* Copyright (C) 1992,93,94,95,96,97,98,99,2000, 2001 Free Software Foundation, Inc. |
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Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc. |
This file is part of the GNU C Library. |
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This program is free software; you can redistribute it and/or modify |
The GNU C Library is free software; you can redistribute it and/or |
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it under the terms of the GNU General Library Public License as published by |
modify it under the terms of the GNU Library General Public License as |
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the Free Software Foundation; either version 2, or (at your option) |
published by the Free Software Foundation; either version 2 of the |
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any later version. |
License, or (at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
The GNU C Library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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GNU Library General Public License for more details. |
Library General Public License for more details. |
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You should have received a copy of the GNU Library General Public License |
You should have received a copy of the GNU Library General Public |
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along with this program; if not, write to the Free Software |
License along with the GNU C Library; see the file COPYING.LIB. If not, |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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Boston, MA 02111-1307, USA. */ |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <termios.h> |
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/* Alain: Parts originally from GNU Lib C. */ |
#if HAVE_CONFIG_H |
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# include <config.h> |
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#endif |
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static void |
#include <stdio.h> |
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echo_off(int fd, struct termios *stored_settings) |
#include <termios.h> |
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{ |
#include <unistd.h> |
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struct termios new_settings; |
#include "getline.h" |
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tcgetattr (fd, stored_settings); |
#include "unlocked-io.h" |
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new_settings = *stored_settings; |
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new_settings.c_lflag &= (~ECHO); |
/* It is desirable to use this bit on systems that have it. |
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tcsetattr (fd, TCSANOW, &new_settings); |
The only bit of terminal state we want to twiddle is echoing, which is |
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} |
done in software; there is no need to change the state of the terminal |
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hardware. */ |
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static void |
#ifndef TCSASOFT |
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echo_on(int fd, struct termios *stored_settings) |
# define TCSASOFT 0 |
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{ |
#endif |
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tcsetattr (fd, TCSANOW, stored_settings); |
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} |
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char * |
char * |
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getpass (const char * prompt) |
getpass (const char *prompt) |
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{ |
{ |
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FILE *in, *out; |
FILE *in, *out; |
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struct termios stored_settings; |
struct termios s, t; |
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int tty_changed; |
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static char *buf; |
static char *buf; |
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static size_t buf_size; |
static size_t bufsize; |
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char *pbuf; |
ssize_t nread; |
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/* First pass initialize the buffer. */ |
/* Try to write to and read from the terminal if we can. |
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if (buf_size == 0) |
If we can't open the terminal, use stderr and stdin. */ |
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in = fopen ("/dev/tty", "w+"); |
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if (in == NULL) |
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{ |
{ |
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buf_size = 256; |
in = stdin; |
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buf = calloc (1, buf_size); |
out = stderr; |
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if (buf == NULL) |
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return NULL; |
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} |
} |
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else |
else |
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memset (buf, '\0', buf_size); |
out = in; |
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/* Turn echoing off if it is on now. */ |
/* Turn echoing off if it is on now. */ |
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echo_off (fileno (stdin), &stored_settings); |
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if (tcgetattr (fileno (in), &t) == 0) |
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{ |
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/* Save the old one. */ |
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s = t; |
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/* Tricky, tricky. */ |
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t.c_lflag &= ~(ECHO|ISIG); |
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tty_changed = (tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &t) == 0); |
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} |
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else |
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tty_changed = 0; |
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/* Write the prompt. */ |
/* Write the prompt. */ |
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fputs (prompt, stdout); |
fputs (prompt, out); |
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fflush (stdout); |
fflush (out); |
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/* Read the password. */ |
/* Read the password. */ |
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pbuf = fgets (buf, buf_size, stdin); |
nread = getline (&buf, &bufsize, in); |
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if (pbuf) |
if (buf != NULL) |
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{ |
{ |
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size_t nread = strlen (pbuf); |
if (nread < 0) |
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if (nread && pbuf[nread - 1] == '\n') |
buf[0] = '\0'; |
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{ |
else if (buf[nread - 1] == '\n') |
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/* Remove the newline. */ |
{ |
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pbuf[nread - 1] = '\0'; |
/* Remove the newline. */ |
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/* Write the newline that was not echoed. */ |
buf[nread - 1] = '\0'; |
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putc ('\n', stdout); |
if (tty_changed) |
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} |
/* Write the newline that was not echoed. */ |
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putc ('\n', out); |
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} |
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} |
} |
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/* Restore the original setting. */ |
/* Restore the original setting. */ |
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echo_on (fileno (stdin), &stored_settings); |
if (tty_changed) |
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(void) tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &s); |
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return pbuf; |
if (in != stdin) |
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} |
/* We opened the terminal; now close it. */ |
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fclose (in); |
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#ifdef _GETPASS_STANDALONE_TEST |
return buf; |
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int |
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main () |
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{ |
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char *p; |
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p = getpass ("my prompt: "); |
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if (p) |
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printf ("Passwd: %s\n", p); |
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return 0; |
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} |
} |
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#endif |
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