/* 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; return buf; } } 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("Interupted by signal.\n"); fflush(stdout); exit(1); } return buf; }