1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/* Copyright (C) 1992-1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 3 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, see <http://www.gnu.org/licenses/>. */
/* Modified to use with samba by Jeremy Allison, 8th July 1995. */
#include "replace.h"
#include "system/filesys.h"
#include "system/wait.h"
#include "system/terminal.h"
#include "system/passwd.h"
/*
* Define additional missing types
*/
#ifndef HAVE_SIG_ATOMIC_T_TYPE
typedef int sig_atomic_t;
#endif
#ifndef SIGCLD
#define SIGCLD SIGCHLD
#endif
#ifndef SIGNAL_CAST
#define SIGNAL_CAST (RETSIGTYPE (*)(int))
#endif
#ifdef SYSV_TERMIO
/* SYSTEM V TERMIO HANDLING */
static struct termio t;
#define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
#define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
#define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
#ifndef TCSAFLUSH
#define TCSAFLUSH 1
#endif
#ifndef TCSANOW
#define TCSANOW 0
#endif
static int tcgetattr(int fd, struct termio *_t)
{
return ioctl(fd, TCGETA, _t);
}
static int tcsetattr(int fd, int flags, struct termio *_t)
{
if(flags & TCSAFLUSH)
ioctl(fd, TCFLSH, TCIOFLUSH);
return ioctl(fd, TCSETS, _t);
}
#elif !defined(TCSAFLUSH)
/* BSD TERMIO HANDLING */
static struct sgttyb t;
#define ECHO_IS_ON(t) ((t).sg_flags & ECHO)
#define TURN_ECHO_OFF(t) ((t).sg_flags &= ~ECHO)
#define TURN_ECHO_ON(t) ((t).sg_flags |= ECHO)
#define TCSAFLUSH 1
#define TCSANOW 0
static int tcgetattr(int fd, struct sgttyb *_t)
{
return ioctl(fd, TIOCGETP, (char *)_t);
}
static int tcsetattr(int fd, int flags, struct sgttyb *_t)
{
return ioctl(fd, TIOCSETP, (char *)_t);
}
#else /* POSIX TERMIO HANDLING */
#define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
#define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
#define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
static struct termios t;
#endif /* SYSV_TERMIO */
static void catch_signal(int signum,void (*handler)(int ))
{
#ifdef HAVE_SIGACTION
struct sigaction act;
struct sigaction oldact;
memset(&act, 0, sizeof(act));
act.sa_handler = handler;
#ifdef SA_RESTART
/*
* We *want* SIGALRM to interrupt a system call.
*/
if(signum != SIGALRM)
act.sa_flags = SA_RESTART;
#endif
sigemptyset(&act.sa_mask);
sigaddset(&act.sa_mask,signum);
sigaction(signum,&act,&oldact);
#else /* !HAVE_SIGACTION */
/* FIXME: need to handle sigvec and systems with broken signal() */
signal(signum, handler);
#endif
}
static sig_atomic_t gotintr;
static int in_fd = -1;
/***************************************************************
Signal function to tell us were ^C'ed.
****************************************************************/
static void gotintr_sig(void)
{
gotintr = 1;
if (in_fd != -1)
close(in_fd); /* Safe way to force a return. */
in_fd = -1;
}
char *rep_getpass(const char *prompt)
{
FILE *in, *out;
int echo_off;
static char buf[256];
static size_t bufsize = sizeof(buf);
size_t nread;
/* Catch problematic signals */
catch_signal(SIGINT, SIGNAL_CAST gotintr_sig);
/* Try to write to and read from the terminal if we can.
If we can't open the terminal, use stderr and stdin. */
in = fopen ("/dev/tty", "w+");
if (in == NULL) {
in = stdin;
out = stderr;
} else {
out = in;
}
setvbuf(in, NULL, _IONBF, 0);
/* Turn echoing off if it is on now. */
if (tcgetattr (fileno (in), &t) == 0) {
if (ECHO_IS_ON(t)) {
TURN_ECHO_OFF(t);
echo_off = tcsetattr (fileno (in), TCSAFLUSH, &t) == 0;
TURN_ECHO_ON(t);
} else {
echo_off = 0;
}
} else {
echo_off = 0;
}
/* Write the prompt. */
fputs(prompt, out);
fflush(out);
/* Read the password. */
buf[0] = 0;
if (!gotintr) {
in_fd = fileno(in);
if (fgets(buf, bufsize, in) == NULL) {
buf[0] = 0;
}
}
nread = strlen(buf);
if (nread) {
if (buf[nread - 1] == '\n')
buf[nread - 1] = '\0';
}
/* Restore echoing. */
if (echo_off) {
if (gotintr && in_fd == -1) {
in = fopen ("/dev/tty", "w+");
}
if (in != NULL)
tcsetattr (fileno (in), TCSANOW, &t);
}
fprintf(out, "\n");
fflush(out);
if (in && in != stdin) /* We opened the terminal; now close it. */
fclose(in);
/* Catch problematic signals */
catch_signal(SIGINT, SIGNAL_CAST SIG_DFL);
if (gotintr) {
printf("Interrupted by signal.\n");
fflush(stdout);
exit(1);
}
return buf;
}
|
