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 fgets(buf, bufsize, in);
192 if (buf[nread - 1] == '\n')
193 buf[nread - 1] = '\0';
196 /* Restore echoing. */
198 if (gotintr && in_fd == -1)
199 in = fopen ("/dev/tty", "w+");
201 tcsetattr (fileno (in), TCSANOW, &t);
207 if (in && in != stdin) /* We opened the terminal; now close it. */
210 /* Catch problematic signals */
211 catch_signal(SIGINT, SIGNAL_CAST SIG_DFL);
214 printf("Interrupted by signal.\n");