1
/* Copyright (C) 1992-1998 Free Software Foundation, Inc.
2
This file is part of the GNU C Library.
4
The GNU C Library is free software; you can redistribute it and/or
5
modify it under the terms of the GNU Lesser General Public License as
6
published by the Free Software Foundation; either version 3 of the
7
License, or (at your option) any later version.
9
The GNU C Library is distributed in the hope that it will be useful,
10
but WITHOUT ANY WARRANTY; without even the implied warranty of
11
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12
Library General Public License for more details.
14
You should have received a copy of the GNU Lesser General Public
15
License along with the GNU C Library; see the file COPYING.LIB. If
16
not, see <http://www.gnu.org/licenses/>. */
18
/* Modified to use with samba by Jeremy Allison, 8th July 1995. */
21
#include "system/filesys.h"
22
#include "system/wait.h"
23
#include "system/terminal.h"
24
#include "system/passwd.h"
27
* Define additional missing types
29
#ifndef HAVE_SIG_ATOMIC_T_TYPE
30
typedef int sig_atomic_t;
34
#define SIGCLD SIGCHLD
38
#define SIGNAL_CAST (RETSIGTYPE (*)(int))
43
/* SYSTEM V TERMIO HANDLING */
45
static struct termio t;
47
#define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
48
#define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
49
#define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
59
static int tcgetattr(int fd, struct termio *_t)
61
return ioctl(fd, TCGETA, _t);
64
static int tcsetattr(int fd, int flags, struct termio *_t)
67
ioctl(fd, TCFLSH, TCIOFLUSH);
68
return ioctl(fd, TCSETS, _t);
71
#elif !defined(TCSAFLUSH)
73
/* BSD TERMIO HANDLING */
75
static struct sgttyb t;
77
#define ECHO_IS_ON(t) ((t).sg_flags & ECHO)
78
#define TURN_ECHO_OFF(t) ((t).sg_flags &= ~ECHO)
79
#define TURN_ECHO_ON(t) ((t).sg_flags |= ECHO)
84
static int tcgetattr(int fd, struct sgttyb *_t)
86
return ioctl(fd, TIOCGETP, (char *)_t);
89
static int tcsetattr(int fd, int flags, struct sgttyb *_t)
91
return ioctl(fd, TIOCSETP, (char *)_t);
94
#else /* POSIX TERMIO HANDLING */
95
#define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
96
#define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
97
#define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
99
static struct termios t;
100
#endif /* SYSV_TERMIO */
102
static void catch_signal(int signum,void (*handler)(int ))
104
#ifdef HAVE_SIGACTION
105
struct sigaction act;
106
struct sigaction oldact;
108
memset(&act, 0, sizeof(act));
110
act.sa_handler = handler;
113
* We *want* SIGALRM to interrupt a system call.
115
if(signum != SIGALRM)
116
act.sa_flags = SA_RESTART;
118
sigemptyset(&act.sa_mask);
119
sigaddset(&act.sa_mask,signum);
120
sigaction(signum,&act,&oldact);
121
#else /* !HAVE_SIGACTION */
122
/* FIXME: need to handle sigvec and systems with broken signal() */
123
signal(signum, handler);
127
static sig_atomic_t gotintr;
128
static int in_fd = -1;
130
/***************************************************************
131
Signal function to tell us were ^C'ed.
132
****************************************************************/
134
static void gotintr_sig(void)
138
close(in_fd); /* Safe way to force a return. */
142
char *rep_getpass(const char *prompt)
146
static char buf[256];
147
static size_t bufsize = sizeof(buf);
150
/* Catch problematic signals */
151
catch_signal(SIGINT, SIGNAL_CAST gotintr_sig);
153
/* Try to write to and read from the terminal if we can.
154
If we can't open the terminal, use stderr and stdin. */
156
in = fopen ("/dev/tty", "w+");
164
setvbuf(in, NULL, _IONBF, 0);
166
/* Turn echoing off if it is on now. */
168
if (tcgetattr (fileno (in), &t) == 0) {
171
echo_off = tcsetattr (fileno (in), TCSAFLUSH, &t) == 0;
180
/* Write the prompt. */
184
/* Read the password. */
188
if (fgets(buf, bufsize, in) == NULL) {
194
if (buf[nread - 1] == '\n')
195
buf[nread - 1] = '\0';
198
/* Restore echoing. */
200
if (gotintr && in_fd == -1) {
201
in = fopen ("/dev/tty", "w+");
204
tcsetattr (fileno (in), TCSANOW, &t);
210
if (in && in != stdin) /* We opened the terminal; now close it. */
213
/* Catch problematic signals */
214
catch_signal(SIGINT, SIGNAL_CAST SIG_DFL);
217
printf("Interupted by signal.\n");