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/* 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
#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(int signum)
{
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, 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, SIG_DFL);
if (gotintr) {
printf("Interrupted by signal.\n");
fflush(stdout);
exit(1);
}
return buf;
}
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