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/*
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* lftp - file transfer program
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*
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* Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <termios.h>
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#include "GetPass.h"
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#include "CharReader.h"
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#include "SignalHook.h"
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const char *GetPass(const char *prompt)
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{
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static xstring_c oldpass;
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static int tty_fd=-2;
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if(tty_fd==-2)
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{
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if(isatty(0))
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tty_fd=0;
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else
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{
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tty_fd=open("/dev/tty",O_RDONLY);
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if(tty_fd!=-1)
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fcntl(tty_fd,F_SETFD,FD_CLOEXEC);
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}
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}
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if(tty_fd==-1)
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return 0;
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write(tty_fd,prompt,strlen(prompt));
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struct termios tc;
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tcgetattr(tty_fd,&tc);
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tcflag_t old_lflag=tc.c_lflag;
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tc.c_lflag&=~ECHO;
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tcsetattr(tty_fd,TCSANOW,&tc);
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oldpass.set_allocated(readline_from_file(tty_fd));
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tc.c_lflag=old_lflag;
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tcsetattr(tty_fd,TCSANOW,&tc);
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write(tty_fd,"\r\n",2);
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return oldpass;
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}
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char *readline_from_file(int fd)
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{
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xstring line("");
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for(;;)
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{
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SMTaskRef<CharReader> rr(new CharReader(fd));
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CharReader& r=*rr.get_non_const();
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int c;
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for(;;)
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{
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SMTask::Schedule();
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c=r.GetChar();
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if(c!=r.NOCHAR)
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break;
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SMTask::Block();
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if(SignalHook::GetCount(SIGINT)>0)
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return(xstrdup(""));
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}
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if(c==r.EOFCHAR && line.length()==0)
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return(NULL);
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if(c==r.EOFCHAR || c=='\n')
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return(line.borrow());
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line.append(c);
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}
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}
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