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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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/* Based on sshpty.c from openssh written by Tatu Ylonen <ylo@cs.hut.fi> */
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#include <config.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <string.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#ifdef HAVE_TERMIOS_H
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# include <termios.h>
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#endif
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#ifdef HAVE_UTIL_H
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# include <util.h>
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#endif
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#ifdef HAVE_PTY_H
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# include <pty.h>
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#endif
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#ifdef HAVE_SYS_STROPTS_H
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# include <sys/stropts.h>
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#endif
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#include "lftp_pty.h"
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const char *open_pty(int *ptyfd, int *ttyfd)
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{
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const char *name=0;
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void *old_sigchld=signal(SIGCHLD,SIG_DFL);
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*ptyfd=*ttyfd=-1;
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#if defined(HAVE_OPENPTY) || defined(BSD4_4)
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/* openpty(3) exists in OSF/1 and some other os'es */
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openpty(ptyfd, ttyfd, NULL, NULL, NULL);
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#else /* HAVE_OPENPTY */
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#ifdef HAVE__GETPTY
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/*
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* _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates more
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* pty's automagically when needed
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*/
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name=_getpty(ptyfd,O_RDWR|O_NOCTTY,0600,0);
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#else /* HAVE__GETPTY */
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#if defined(HAVE_DEV_PTMX)
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/*
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* This code is used e.g. on Solaris 2.x. (Note that Solaris 2.3
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* also has bsd-style ptys, but they simply do not work.)
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*/
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*ptyfd=open("/dev/ptmx",O_RDWR|O_NOCTTY);
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if(*ptyfd<0)
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goto fail;
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if(grantpt(*ptyfd)<0)
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goto fail;
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if(unlockpt(*ptyfd)<0)
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goto fail;
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name=ptsname(*ptyfd);
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#else /* HAVE_DEV_PTMX */
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#ifdef HAVE_DEV_PTS_AND_PTC
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{
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/* AIX-style pty code. */
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*ptyfd=open("/dev/ptc",O_RDWR|O_NOCTTY);
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if(*ptyfd<0)
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goto fail;
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name=ttyname(*ptyfd);
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}
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#else /* HAVE_DEV_PTS_AND_PTC */
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{
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/* BSD-style pty code. */
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char master[64];
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static char slave[64];
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int i;
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const char *ptymajors="pqrstuvwxyzabcdefghijklmnoABCDEFGHIJKLMNOPQRSTUVWXYZ";
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const char *ptyminors="0123456789abcdef";
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int num_minors=strlen(ptyminors);
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int num_ptys=strlen(ptymajors)*num_minors;
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for(i=0; i
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{
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sprintf(master,"/dev/pty%c%c",ptymajors[i/num_minors],ptyminors[i%num_minors]);
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sprintf(slave, "/dev/tty%c%c",ptymajors[i/num_minors],ptyminors[i%num_minors]);
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*ptyfd=open(master,O_RDWR|O_NOCTTY);
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if(*ptyfd>=0)
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break;
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/* Try SCO style naming */
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sprintf(master,"/dev/ptyp%d",i);
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sprintf(slave, "/dev/ttyp%d",i);
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*ptyfd=open(master,O_RDWR|O_NOCTTY);
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if(*ptyfd>=0)
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break;
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}
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name=slave;
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}
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#endif /* HAVE_DEV_PTS_AND_PTC */
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#endif /* HAVE_DEV_PTMX */
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#endif /* HAVE__GETPTY */
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#endif /* HAVE_OPENPTY */
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if(*ptyfd<0)
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goto fail;
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if(name && *ttyfd<0)
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*ttyfd=open(name,O_RDWR|O_NOCTTY);
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if(!name && *ttyfd>=0)
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name=ttyname(*ttyfd);
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if(!name || *ttyfd<0)
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goto fail;
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#if defined(HAVE_DEV_PTMX) && defined(I_PUSH) \
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&& !defined(HAVE__GETPTY) && !defined(HAVE_OPENPTY)
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ioctl(*ttyfd, I_PUSH, "ptem");
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ioctl(*ttyfd, I_PUSH, "ldterm");
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ioctl(*ttyfd, I_PUSH, "ttcompat");
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#endif
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#ifdef HAVE_FCHMOD
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fchmod(*ttyfd,0600);
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#else
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chmod(name,0600);
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#endif
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signal(SIGCHLD,old_sigchld);
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return name;
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fail:
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if(*ttyfd>=0)
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close(*ttyfd);
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if(*ptyfd>=0)
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close(*ptyfd);
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signal(SIGCHLD,old_sigchld);
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return 0;
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}
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