1/* Copyright (C) 1992-1998 Free Software Foundation, Inc.
2This file is part of the GNU C Library.
3
4The GNU C Library is free software; you can redistribute it and/or
5modify it under the terms of the GNU Library General Public License as
6published by the Free Software Foundation; either version 2 of the
7License, or (at your option) any later version.
8
9The GNU C Library is distributed in the hope that it will be useful,
10but WITHOUT ANY WARRANTY; without even the implied warranty of
11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12Library General Public License for more details.
13
14You should have received a copy of the GNU Library General Public
15License along with the GNU C Library; see the file COPYING.LIB.  If
16not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17Cambridge, MA 02139, USA.  */
18
19/* Modified to use with samba by Jeremy Allison, 8th July 1995. */
20
21#include "includes.h"
22
23#ifdef REPLACE_GETPASS
24
25#ifdef SYSV_TERMIO
26
27/* SYSTEM V TERMIO HANDLING */
28
29static struct termio t;
30
31#define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
32#define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
33#define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
34
35#ifndef TCSAFLUSH
36#define TCSAFLUSH 1
37#endif
38
39#ifndef TCSANOW
40#define TCSANOW 0
41#endif
42
43static int tcgetattr(int fd, struct termio *t)
44{
45	return ioctl(fd, TCGETA, t);
46}
47
48static int tcsetattr(int fd, int flags, struct termio *t)
49{
50	if(flags & TCSAFLUSH)
51		ioctl(fd, TCFLSH, TCIOFLUSH);
52	return ioctl(fd, TCSETS, t);
53}
54
55#elif !defined(TCSAFLUSH)
56
57/* BSD TERMIO HANDLING */
58
59static struct sgttyb t;
60
61#define ECHO_IS_ON(t) ((t).sg_flags & ECHO)
62#define TURN_ECHO_OFF(t) ((t).sg_flags &= ~ECHO)
63#define TURN_ECHO_ON(t) ((t).sg_flags |= ECHO)
64
65#define TCSAFLUSH 1
66#define TCSANOW 0
67
68static int tcgetattr(int fd, struct sgttyb *t)
69{
70	return ioctl(fd, TIOCGETP, (char *)t);
71}
72
73static int tcsetattr(int fd, int flags, struct sgttyb *t)
74{
75	return ioctl(fd, TIOCSETP, (char *)t);
76}
77
78#else /* POSIX TERMIO HANDLING */
79#define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
80#define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
81#define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
82
83static struct termios t;
84#endif /* SYSV_TERMIO */
85
86static SIG_ATOMIC_T gotintr;
87static int in_fd = -1;
88
89/***************************************************************
90 Signal function to tell us were ^C'ed.
91****************************************************************/
92
93static void gotintr_sig(void)
94{
95	gotintr = 1;
96	if (in_fd != -1)
97		close(in_fd); /* Safe way to force a return. */
98	in_fd = -1;
99}
100
101char *getsmbpass(const char *prompt)
102{
103	FILE *in, *out;
104	int echo_off;
105	static char buf[256];
106	static size_t bufsize = sizeof(buf);
107	size_t nread;
108
109	/* Catch problematic signals */
110	CatchSignal(SIGINT, SIGNAL_CAST gotintr_sig);
111
112	/* Try to write to and read from the terminal if we can.
113		If we can't open the terminal, use stderr and stdin.  */
114
115	in = fopen ("/dev/tty", "w+");
116	if (in == NULL) {
117		in = stdin;
118		out = stderr;
119	} else {
120		out = in;
121	}
122
123	setvbuf(in, NULL, _IONBF, 0);
124
125	/* Turn echoing off if it is on now.  */
126
127	if (tcgetattr (fileno (in), &t) == 0) {
128		if (ECHO_IS_ON(t)) {
129			TURN_ECHO_OFF(t);
130			echo_off = tcsetattr (fileno (in), TCSAFLUSH, &t) == 0;
131			TURN_ECHO_ON(t);
132		} else {
133			echo_off = 0;
134		}
135	} else {
136		echo_off = 0;
137	}
138
139	/* Write the prompt.  */
140	fputs(prompt, out);
141	fflush(out);
142
143	/* Read the password.  */
144	buf[0] = 0;
145	if (!gotintr) {
146		in_fd = fileno(in);
147		fgets(buf, bufsize, in);
148	}
149	nread = strlen(buf);
150	if (buf[nread - 1] == '\n')
151		buf[nread - 1] = '\0';
152
153	/* Restore echoing.  */
154	if (echo_off) {
155		if (gotintr && in_fd == -1)
156			in = fopen ("/dev/tty", "w+");
157		if (in != NULL)
158			tcsetattr (fileno (in), TCSANOW, &t);
159	}
160
161	fprintf(out, "\n");
162	fflush(out);
163
164	if (in != stdin) /* We opened the terminal; now close it.  */
165		fclose(in);
166
167	/* Catch problematic signals */
168	CatchSignal(SIGINT, SIGNAL_CAST SIG_DFL);
169
170	if (gotintr) {
171		printf("Interupted by signal.\n");
172		fflush(stdout);
173		exit(1);
174	}
175	return buf;
176}
177
178#else
179 void getsmbpasswd_dummy(void);
180 void getsmbpasswd_dummy(void) {;}
181#endif
182