1193 lines
24 KiB
C
1193 lines
24 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char sccsid[] = "@(#)sys_term.c 8.4+1 (Berkeley) 5/30/95";
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#endif
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/tty.h>
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#include <libutil.h>
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#include <stdlib.h>
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#include <utmp.h>
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#include "telnetd.h"
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#include "pathnames.h"
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int cleanopen(char *);
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void scrub_env(void);
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struct utmp wtmp;
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#ifdef _PATH_WTMP
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char wtmpf[] = _PATH_WTMP;
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#else
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char wtmpf[] = "/var/log/wtmp";
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#endif
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#ifdef _PATH_UTMP
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char utmpf[] = _PATH_UTMP;
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#else
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char utmpf[] = "/var/run/utmp";
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#endif
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char *envinit[3];
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extern char **environ;
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#define SCPYN(a, b) (void) strncpy(a, b, sizeof(a))
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#define SCMPN(a, b) strncmp(a, b, sizeof(a))
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#ifdef t_erase
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#undef t_erase
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#undef t_kill
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#undef t_intrc
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#undef t_quitc
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#undef t_startc
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#undef t_stopc
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#undef t_eofc
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#undef t_brkc
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#undef t_suspc
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#undef t_dsuspc
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#undef t_rprntc
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#undef t_flushc
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#undef t_werasc
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#undef t_lnextc
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#endif
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#ifndef USE_TERMIO
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struct termbuf {
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struct sgttyb sg;
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struct tchars tc;
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struct ltchars ltc;
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int state;
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int lflags;
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} termbuf, termbuf2;
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# define cfsetospeed(tp, val) (tp)->sg.sg_ospeed = (val)
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# define cfsetispeed(tp, val) (tp)->sg.sg_ispeed = (val)
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# define cfgetospeed(tp) (tp)->sg.sg_ospeed
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# define cfgetispeed(tp) (tp)->sg.sg_ispeed
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#else /* USE_TERMIO */
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# ifndef TCSANOW
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# ifdef TCSETS
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# define TCSANOW TCSETS
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# define TCSADRAIN TCSETSW
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# define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
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# else
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# ifdef TCSETA
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# define TCSANOW TCSETA
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# define TCSADRAIN TCSETAW
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# define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
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# else
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# define TCSANOW TIOCSETA
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# define TCSADRAIN TIOCSETAW
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# define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
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# endif
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# endif
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# define tcsetattr(f, a, t) ioctl(f, a, t)
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# define cfsetospeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
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(tp)->c_cflag |= (val)
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# define cfgetospeed(tp) ((tp)->c_cflag & CBAUD)
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# ifdef CIBAUD
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# define cfsetispeed(tp, val) (tp)->c_cflag &= ~CIBAUD; \
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(tp)->c_cflag |= ((val)<<IBSHIFT)
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# define cfgetispeed(tp) (((tp)->c_cflag & CIBAUD)>>IBSHIFT)
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# else
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# define cfsetispeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
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(tp)->c_cflag |= (val)
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# define cfgetispeed(tp) ((tp)->c_cflag & CBAUD)
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# endif
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# endif /* TCSANOW */
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struct termios termbuf, termbuf2; /* pty control structure */
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#endif /* USE_TERMIO */
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#include <sys/types.h>
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#include <libutil.h>
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int cleanopen(char *);
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void scrub_env(void);
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static char **addarg(char **, const char *);
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/*
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* init_termbuf()
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* copy_termbuf(cp)
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* set_termbuf()
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*
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* These three routines are used to get and set the "termbuf" structure
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* to and from the kernel. init_termbuf() gets the current settings.
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* copy_termbuf() hands in a new "termbuf" to write to the kernel, and
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* set_termbuf() writes the structure into the kernel.
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*/
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void
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init_termbuf(void)
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{
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#ifndef USE_TERMIO
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(void) ioctl(pty, TIOCGETP, (char *)&termbuf.sg);
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(void) ioctl(pty, TIOCGETC, (char *)&termbuf.tc);
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(void) ioctl(pty, TIOCGLTC, (char *)&termbuf.ltc);
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# ifdef TIOCGSTATE
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(void) ioctl(pty, TIOCGSTATE, (char *)&termbuf.state);
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# endif
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#else
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(void) tcgetattr(pty, &termbuf);
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#endif
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termbuf2 = termbuf;
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}
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#if defined(LINEMODE) && defined(TIOCPKT_IOCTL)
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void
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copy_termbuf(char *cp, size_t len)
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{
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if (len > sizeof(termbuf))
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len = sizeof(termbuf);
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memmove((char *)&termbuf, cp, len);
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termbuf2 = termbuf;
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}
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#endif /* defined(LINEMODE) && defined(TIOCPKT_IOCTL) */
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void
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set_termbuf(void)
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{
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/*
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* Only make the necessary changes.
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*/
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#ifndef USE_TERMIO
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if (memcmp((char *)&termbuf.sg, (char *)&termbuf2.sg,
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sizeof(termbuf.sg)))
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(void) ioctl(pty, TIOCSETN, (char *)&termbuf.sg);
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if (memcmp((char *)&termbuf.tc, (char *)&termbuf2.tc,
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sizeof(termbuf.tc)))
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(void) ioctl(pty, TIOCSETC, (char *)&termbuf.tc);
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if (memcmp((char *)&termbuf.ltc, (char *)&termbuf2.ltc,
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sizeof(termbuf.ltc)))
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(void) ioctl(pty, TIOCSLTC, (char *)&termbuf.ltc);
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if (termbuf.lflags != termbuf2.lflags)
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(void) ioctl(pty, TIOCLSET, (char *)&termbuf.lflags);
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#else /* USE_TERMIO */
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if (memcmp((char *)&termbuf, (char *)&termbuf2, sizeof(termbuf)))
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(void) tcsetattr(pty, TCSANOW, &termbuf);
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#endif /* USE_TERMIO */
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}
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/*
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* spcset(func, valp, valpp)
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*
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* This function takes various special characters (func), and
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* sets *valp to the current value of that character, and
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* *valpp to point to where in the "termbuf" structure that
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* value is kept.
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*
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* It returns the SLC_ level of support for this function.
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*/
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#ifndef USE_TERMIO
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int
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spcset(int func, cc_t *valp, cc_t **valpp)
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{
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switch(func) {
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case SLC_EOF:
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*valp = termbuf.tc.t_eofc;
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*valpp = (cc_t *)&termbuf.tc.t_eofc;
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return(SLC_VARIABLE);
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case SLC_EC:
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*valp = termbuf.sg.sg_erase;
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*valpp = (cc_t *)&termbuf.sg.sg_erase;
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return(SLC_VARIABLE);
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case SLC_EL:
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*valp = termbuf.sg.sg_kill;
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*valpp = (cc_t *)&termbuf.sg.sg_kill;
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return(SLC_VARIABLE);
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case SLC_IP:
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*valp = termbuf.tc.t_intrc;
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*valpp = (cc_t *)&termbuf.tc.t_intrc;
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return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
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case SLC_ABORT:
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*valp = termbuf.tc.t_quitc;
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*valpp = (cc_t *)&termbuf.tc.t_quitc;
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return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
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case SLC_XON:
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*valp = termbuf.tc.t_startc;
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*valpp = (cc_t *)&termbuf.tc.t_startc;
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return(SLC_VARIABLE);
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case SLC_XOFF:
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*valp = termbuf.tc.t_stopc;
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*valpp = (cc_t *)&termbuf.tc.t_stopc;
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return(SLC_VARIABLE);
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case SLC_AO:
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*valp = termbuf.ltc.t_flushc;
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*valpp = (cc_t *)&termbuf.ltc.t_flushc;
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return(SLC_VARIABLE);
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case SLC_SUSP:
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*valp = termbuf.ltc.t_suspc;
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*valpp = (cc_t *)&termbuf.ltc.t_suspc;
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return(SLC_VARIABLE);
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case SLC_EW:
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*valp = termbuf.ltc.t_werasc;
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*valpp = (cc_t *)&termbuf.ltc.t_werasc;
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return(SLC_VARIABLE);
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case SLC_RP:
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*valp = termbuf.ltc.t_rprntc;
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*valpp = (cc_t *)&termbuf.ltc.t_rprntc;
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return(SLC_VARIABLE);
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case SLC_LNEXT:
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*valp = termbuf.ltc.t_lnextc;
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*valpp = (cc_t *)&termbuf.ltc.t_lnextc;
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return(SLC_VARIABLE);
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case SLC_FORW1:
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*valp = termbuf.tc.t_brkc;
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*valpp = (cc_t *)&termbuf.ltc.t_lnextc;
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return(SLC_VARIABLE);
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case SLC_BRK:
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case SLC_SYNCH:
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case SLC_AYT:
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case SLC_EOR:
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*valp = (cc_t)0;
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*valpp = (cc_t *)0;
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return(SLC_DEFAULT);
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default:
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*valp = (cc_t)0;
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*valpp = (cc_t *)0;
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return(SLC_NOSUPPORT);
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}
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}
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#else /* USE_TERMIO */
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#define setval(a, b) *valp = termbuf.c_cc[a]; \
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*valpp = &termbuf.c_cc[a]; \
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return(b);
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#define defval(a) *valp = ((cc_t)a); *valpp = (cc_t *)0; return(SLC_DEFAULT);
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int
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spcset(int func, cc_t *valp, cc_t **valpp)
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{
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switch(func) {
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case SLC_EOF:
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setval(VEOF, SLC_VARIABLE);
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case SLC_EC:
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setval(VERASE, SLC_VARIABLE);
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case SLC_EL:
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setval(VKILL, SLC_VARIABLE);
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case SLC_IP:
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setval(VINTR, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
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case SLC_ABORT:
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setval(VQUIT, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
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case SLC_XON:
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#ifdef VSTART
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setval(VSTART, SLC_VARIABLE);
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#else
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defval(0x13);
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#endif
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case SLC_XOFF:
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#ifdef VSTOP
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setval(VSTOP, SLC_VARIABLE);
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#else
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defval(0x11);
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#endif
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case SLC_EW:
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#ifdef VWERASE
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setval(VWERASE, SLC_VARIABLE);
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#else
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defval(0);
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#endif
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case SLC_RP:
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#ifdef VREPRINT
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setval(VREPRINT, SLC_VARIABLE);
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#else
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defval(0);
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#endif
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case SLC_LNEXT:
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#ifdef VLNEXT
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setval(VLNEXT, SLC_VARIABLE);
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#else
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defval(0);
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#endif
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case SLC_AO:
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#if !defined(VDISCARD) && defined(VFLUSHO)
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# define VDISCARD VFLUSHO
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#endif
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#ifdef VDISCARD
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setval(VDISCARD, SLC_VARIABLE|SLC_FLUSHOUT);
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#else
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defval(0);
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#endif
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case SLC_SUSP:
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#ifdef VSUSP
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setval(VSUSP, SLC_VARIABLE|SLC_FLUSHIN);
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#else
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defval(0);
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#endif
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#ifdef VEOL
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case SLC_FORW1:
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setval(VEOL, SLC_VARIABLE);
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#endif
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#ifdef VEOL2
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case SLC_FORW2:
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setval(VEOL2, SLC_VARIABLE);
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#endif
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case SLC_AYT:
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#ifdef VSTATUS
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setval(VSTATUS, SLC_VARIABLE);
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#else
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defval(0);
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#endif
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case SLC_BRK:
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case SLC_SYNCH:
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case SLC_EOR:
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defval(0);
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default:
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*valp = 0;
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*valpp = 0;
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return(SLC_NOSUPPORT);
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}
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}
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#endif /* USE_TERMIO */
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/*
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* getpty()
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*
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* Allocate a pty. As a side effect, the external character
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* array "line" contains the name of the slave side.
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*
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* Returns the file descriptor of the opened pty.
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*/
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char alpha[] = "0123456789abcdefghijklmnopqrstuv";
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char line[16];
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int
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getpty(int *ptynum __unused)
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{
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int p;
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const char *cp;
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char *p1, *p2;
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int i;
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(void) strcpy(line, _PATH_DEV);
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(void) strcat(line, "ptyXX");
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p1 = &line[8];
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p2 = &line[9];
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for (cp = "pqrsPQRS"; *cp; cp++) {
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struct stat stb;
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*p1 = *cp;
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*p2 = '0';
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/*
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* This stat() check is just to keep us from
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* looping through all 256 combinations if there
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* aren't that many ptys available.
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*/
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if (stat(line, &stb) < 0)
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break;
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for (i = 0; i < 32; i++) {
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*p2 = alpha[i];
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p = open(line, 2);
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if (p > 0) {
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line[5] = 't';
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chown(line, 0, 0);
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chmod(line, 0600);
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return(p);
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}
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}
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}
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return(-1);
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}
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#ifdef LINEMODE
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/*
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* tty_flowmode() Find out if flow control is enabled or disabled.
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* tty_linemode() Find out if linemode (external processing) is enabled.
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* tty_setlinemod(on) Turn on/off linemode.
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* tty_isecho() Find out if echoing is turned on.
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* tty_setecho(on) Enable/disable character echoing.
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* tty_israw() Find out if terminal is in RAW mode.
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* tty_binaryin(on) Turn on/off BINARY on input.
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* tty_binaryout(on) Turn on/off BINARY on output.
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* tty_isediting() Find out if line editing is enabled.
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* tty_istrapsig() Find out if signal trapping is enabled.
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* tty_setedit(on) Turn on/off line editing.
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* tty_setsig(on) Turn on/off signal trapping.
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* tty_issofttab() Find out if tab expansion is enabled.
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* tty_setsofttab(on) Turn on/off soft tab expansion.
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* tty_islitecho() Find out if typed control chars are echoed literally
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* tty_setlitecho() Turn on/off literal echo of control chars
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* tty_tspeed(val) Set transmit speed to val.
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* tty_rspeed(val) Set receive speed to val.
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*/
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int
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tty_linemode(void)
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{
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#ifndef USE_TERMIO
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return(termbuf.state & TS_EXTPROC);
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#else
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return(termbuf.c_lflag & EXTPROC);
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#endif
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}
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void
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tty_setlinemode(int on)
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{
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#ifdef TIOCEXT
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set_termbuf();
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(void) ioctl(pty, TIOCEXT, (char *)&on);
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init_termbuf();
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#else /* !TIOCEXT */
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# ifdef EXTPROC
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if (on)
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termbuf.c_lflag |= EXTPROC;
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else
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termbuf.c_lflag &= ~EXTPROC;
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# endif
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#endif /* TIOCEXT */
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}
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#endif /* LINEMODE */
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int
|
|
tty_isecho(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return (termbuf.sg.sg_flags & ECHO);
|
|
#else
|
|
return (termbuf.c_lflag & ECHO);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
tty_flowmode(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return(((termbuf.tc.t_startc) > 0 && (termbuf.tc.t_stopc) > 0) ? 1 : 0);
|
|
#else
|
|
return((termbuf.c_iflag & IXON) ? 1 : 0);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
tty_restartany(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
# ifdef DECCTQ
|
|
return((termbuf.lflags & DECCTQ) ? 0 : 1);
|
|
# else
|
|
return(-1);
|
|
# endif
|
|
#else
|
|
return((termbuf.c_iflag & IXANY) ? 1 : 0);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
tty_setecho(int on)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
if (on)
|
|
termbuf.sg.sg_flags |= ECHO|CRMOD;
|
|
else
|
|
termbuf.sg.sg_flags &= ~(ECHO|CRMOD);
|
|
#else
|
|
if (on)
|
|
termbuf.c_lflag |= ECHO;
|
|
else
|
|
termbuf.c_lflag &= ~ECHO;
|
|
#endif
|
|
}
|
|
|
|
int
|
|
tty_israw(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return(termbuf.sg.sg_flags & RAW);
|
|
#else
|
|
return(!(termbuf.c_lflag & ICANON));
|
|
#endif
|
|
}
|
|
|
|
|
|
void
|
|
tty_binaryin(int on)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
if (on)
|
|
termbuf.lflags |= LPASS8;
|
|
else
|
|
termbuf.lflags &= ~LPASS8;
|
|
#else
|
|
if (on) {
|
|
termbuf.c_iflag &= ~ISTRIP;
|
|
} else {
|
|
termbuf.c_iflag |= ISTRIP;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
tty_binaryout(int on)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
if (on)
|
|
termbuf.lflags |= LLITOUT;
|
|
else
|
|
termbuf.lflags &= ~LLITOUT;
|
|
#else
|
|
if (on) {
|
|
termbuf.c_cflag &= ~(CSIZE|PARENB);
|
|
termbuf.c_cflag |= CS8;
|
|
termbuf.c_oflag &= ~OPOST;
|
|
} else {
|
|
termbuf.c_cflag &= ~CSIZE;
|
|
termbuf.c_cflag |= CS7|PARENB;
|
|
termbuf.c_oflag |= OPOST;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int
|
|
tty_isbinaryin(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return(termbuf.lflags & LPASS8);
|
|
#else
|
|
return(!(termbuf.c_iflag & ISTRIP));
|
|
#endif
|
|
}
|
|
|
|
int
|
|
tty_isbinaryout(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return(termbuf.lflags & LLITOUT);
|
|
#else
|
|
return(!(termbuf.c_oflag&OPOST));
|
|
#endif
|
|
}
|
|
|
|
#ifdef LINEMODE
|
|
int
|
|
tty_isediting(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return(!(termbuf.sg.sg_flags & (CBREAK|RAW)));
|
|
#else
|
|
return(termbuf.c_lflag & ICANON);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
tty_istrapsig(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return(!(termbuf.sg.sg_flags&RAW));
|
|
#else
|
|
return(termbuf.c_lflag & ISIG);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
tty_setedit(int on)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
if (on)
|
|
termbuf.sg.sg_flags &= ~CBREAK;
|
|
else
|
|
termbuf.sg.sg_flags |= CBREAK;
|
|
#else
|
|
if (on)
|
|
termbuf.c_lflag |= ICANON;
|
|
else
|
|
termbuf.c_lflag &= ~ICANON;
|
|
#endif
|
|
}
|
|
|
|
void
|
|
tty_setsig(int on)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
if (on)
|
|
;
|
|
#else
|
|
if (on)
|
|
termbuf.c_lflag |= ISIG;
|
|
else
|
|
termbuf.c_lflag &= ~ISIG;
|
|
#endif
|
|
}
|
|
#endif /* LINEMODE */
|
|
|
|
int
|
|
tty_issofttab(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return (termbuf.sg.sg_flags & XTABS);
|
|
#else
|
|
# ifdef OXTABS
|
|
return (termbuf.c_oflag & OXTABS);
|
|
# endif
|
|
# ifdef TABDLY
|
|
return ((termbuf.c_oflag & TABDLY) == TAB3);
|
|
# endif
|
|
#endif
|
|
}
|
|
|
|
void
|
|
tty_setsofttab(int on)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
if (on)
|
|
termbuf.sg.sg_flags |= XTABS;
|
|
else
|
|
termbuf.sg.sg_flags &= ~XTABS;
|
|
#else
|
|
if (on) {
|
|
# ifdef OXTABS
|
|
termbuf.c_oflag |= OXTABS;
|
|
# endif
|
|
# ifdef TABDLY
|
|
termbuf.c_oflag &= ~TABDLY;
|
|
termbuf.c_oflag |= TAB3;
|
|
# endif
|
|
} else {
|
|
# ifdef OXTABS
|
|
termbuf.c_oflag &= ~OXTABS;
|
|
# endif
|
|
# ifdef TABDLY
|
|
termbuf.c_oflag &= ~TABDLY;
|
|
termbuf.c_oflag |= TAB0;
|
|
# endif
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int
|
|
tty_islitecho(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return (!(termbuf.lflags & LCTLECH));
|
|
#else
|
|
# ifdef ECHOCTL
|
|
return (!(termbuf.c_lflag & ECHOCTL));
|
|
# endif
|
|
# ifdef TCTLECH
|
|
return (!(termbuf.c_lflag & TCTLECH));
|
|
# endif
|
|
# if !defined(ECHOCTL) && !defined(TCTLECH)
|
|
return (0); /* assumes ctl chars are echoed '^x' */
|
|
# endif
|
|
#endif
|
|
}
|
|
|
|
void
|
|
tty_setlitecho(int on)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
if (on)
|
|
termbuf.lflags &= ~LCTLECH;
|
|
else
|
|
termbuf.lflags |= LCTLECH;
|
|
#else
|
|
# ifdef ECHOCTL
|
|
if (on)
|
|
termbuf.c_lflag &= ~ECHOCTL;
|
|
else
|
|
termbuf.c_lflag |= ECHOCTL;
|
|
# endif
|
|
# ifdef TCTLECH
|
|
if (on)
|
|
termbuf.c_lflag &= ~TCTLECH;
|
|
else
|
|
termbuf.c_lflag |= TCTLECH;
|
|
# endif
|
|
#endif
|
|
}
|
|
|
|
int
|
|
tty_iscrnl(void)
|
|
{
|
|
#ifndef USE_TERMIO
|
|
return (termbuf.sg.sg_flags & CRMOD);
|
|
#else
|
|
return (termbuf.c_iflag & ICRNL);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
|
|
*/
|
|
#if B4800 != 4800
|
|
#define DECODE_BAUD
|
|
#endif
|
|
|
|
#ifdef DECODE_BAUD
|
|
|
|
/*
|
|
* A table of available terminal speeds
|
|
*/
|
|
struct termspeeds {
|
|
int speed;
|
|
int value;
|
|
} termspeeds[] = {
|
|
{ 0, B0 }, { 50, B50 }, { 75, B75 },
|
|
{ 110, B110 }, { 134, B134 }, { 150, B150 },
|
|
{ 200, B200 }, { 300, B300 }, { 600, B600 },
|
|
{ 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 },
|
|
{ 4800, B4800 },
|
|
#ifdef B7200
|
|
{ 7200, B7200 },
|
|
#endif
|
|
{ 9600, B9600 },
|
|
#ifdef B14400
|
|
{ 14400, B14400 },
|
|
#endif
|
|
#ifdef B19200
|
|
{ 19200, B19200 },
|
|
#endif
|
|
#ifdef B28800
|
|
{ 28800, B28800 },
|
|
#endif
|
|
#ifdef B38400
|
|
{ 38400, B38400 },
|
|
#endif
|
|
#ifdef B57600
|
|
{ 57600, B57600 },
|
|
#endif
|
|
#ifdef B115200
|
|
{ 115200, B115200 },
|
|
#endif
|
|
#ifdef B230400
|
|
{ 230400, B230400 },
|
|
#endif
|
|
{ -1, 0 }
|
|
};
|
|
#endif /* DECODE_BAUD */
|
|
|
|
void
|
|
tty_tspeed(int val)
|
|
{
|
|
#ifdef DECODE_BAUD
|
|
struct termspeeds *tp;
|
|
|
|
for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
|
|
;
|
|
if (tp->speed == -1) /* back up to last valid value */
|
|
--tp;
|
|
cfsetospeed(&termbuf, tp->value);
|
|
#else /* DECODE_BAUD */
|
|
cfsetospeed(&termbuf, val);
|
|
#endif /* DECODE_BAUD */
|
|
}
|
|
|
|
void
|
|
tty_rspeed(int val)
|
|
{
|
|
#ifdef DECODE_BAUD
|
|
struct termspeeds *tp;
|
|
|
|
for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
|
|
;
|
|
if (tp->speed == -1) /* back up to last valid value */
|
|
--tp;
|
|
cfsetispeed(&termbuf, tp->value);
|
|
#else /* DECODE_BAUD */
|
|
cfsetispeed(&termbuf, val);
|
|
#endif /* DECODE_BAUD */
|
|
}
|
|
|
|
/*
|
|
* getptyslave()
|
|
*
|
|
* Open the slave side of the pty, and do any initialization
|
|
* that is necessary.
|
|
*/
|
|
static void
|
|
getptyslave(void)
|
|
{
|
|
int t = -1;
|
|
char erase;
|
|
|
|
# ifdef LINEMODE
|
|
int waslm;
|
|
# endif
|
|
# ifdef TIOCGWINSZ
|
|
struct winsize ws;
|
|
extern int def_row, def_col;
|
|
# endif
|
|
extern int def_tspeed, def_rspeed;
|
|
/*
|
|
* Opening the slave side may cause initilization of the
|
|
* kernel tty structure. We need remember the state of
|
|
* if linemode was turned on
|
|
* terminal window size
|
|
* terminal speed
|
|
* erase character
|
|
* so that we can re-set them if we need to.
|
|
*/
|
|
# ifdef LINEMODE
|
|
waslm = tty_linemode();
|
|
# endif
|
|
erase = termbuf.c_cc[VERASE];
|
|
|
|
/*
|
|
* Make sure that we don't have a controlling tty, and
|
|
* that we are the session (process group) leader.
|
|
*/
|
|
# ifdef TIOCNOTTY
|
|
t = open(_PATH_TTY, O_RDWR);
|
|
if (t >= 0) {
|
|
(void) ioctl(t, TIOCNOTTY, (char *)0);
|
|
(void) close(t);
|
|
}
|
|
# endif
|
|
|
|
t = cleanopen(line);
|
|
if (t < 0)
|
|
fatalperror(net, line);
|
|
|
|
|
|
/*
|
|
* set up the tty modes as we like them to be.
|
|
*/
|
|
init_termbuf();
|
|
# ifdef TIOCGWINSZ
|
|
if (def_row || def_col) {
|
|
memset((char *)&ws, 0, sizeof(ws));
|
|
ws.ws_col = def_col;
|
|
ws.ws_row = def_row;
|
|
(void)ioctl(t, TIOCSWINSZ, (char *)&ws);
|
|
}
|
|
# endif
|
|
|
|
/*
|
|
* Settings for sgtty based systems
|
|
*/
|
|
# ifndef USE_TERMIO
|
|
termbuf.sg.sg_flags |= CRMOD|ANYP|ECHO|XTABS;
|
|
# endif /* USE_TERMIO */
|
|
|
|
/*
|
|
* Settings for all other termios/termio based
|
|
* systems, other than 4.4BSD. In 4.4BSD the
|
|
* kernel does the initial terminal setup.
|
|
*/
|
|
tty_rspeed((def_rspeed > 0) ? def_rspeed : 9600);
|
|
tty_tspeed((def_tspeed > 0) ? def_tspeed : 9600);
|
|
if (erase)
|
|
termbuf.c_cc[VERASE] = erase;
|
|
# ifdef LINEMODE
|
|
if (waslm)
|
|
tty_setlinemode(1);
|
|
# endif /* LINEMODE */
|
|
|
|
/*
|
|
* Set the tty modes, and make this our controlling tty.
|
|
*/
|
|
set_termbuf();
|
|
if (login_tty(t) == -1)
|
|
fatalperror(net, "login_tty");
|
|
if (net > 2)
|
|
(void) close(net);
|
|
}
|
|
|
|
#ifndef O_NOCTTY
|
|
#define O_NOCTTY 0
|
|
#endif
|
|
/*
|
|
* Open the specified slave side of the pty,
|
|
* making sure that we have a clean tty.
|
|
*/
|
|
int
|
|
cleanopen(char *li)
|
|
{
|
|
int t;
|
|
|
|
/*
|
|
* Make sure that other people can't open the
|
|
* slave side of the connection.
|
|
*/
|
|
(void) chown(li, 0, 0);
|
|
(void) chmod(li, 0600);
|
|
|
|
(void) revoke(li);
|
|
|
|
t = open(line, O_RDWR|O_NOCTTY);
|
|
|
|
if (t < 0)
|
|
return(-1);
|
|
|
|
return(t);
|
|
}
|
|
|
|
/*
|
|
* startslave(host)
|
|
*
|
|
* Given a hostname, do whatever
|
|
* is necessary to startup the login process on the slave side of the pty.
|
|
*/
|
|
|
|
/* ARGSUSED */
|
|
void
|
|
startslave(char *host, int autologin, char *autoname)
|
|
{
|
|
int i;
|
|
|
|
|
|
|
|
if ((i = fork()) < 0)
|
|
fatalperror(net, "fork");
|
|
if (i) {
|
|
} else {
|
|
getptyslave();
|
|
start_login(host, autologin, autoname);
|
|
/*NOTREACHED*/
|
|
}
|
|
}
|
|
|
|
void
|
|
init_env(void)
|
|
{
|
|
char **envp;
|
|
|
|
envp = envinit;
|
|
if ((*envp = getenv("TZ")))
|
|
*envp++ -= 3;
|
|
*envp = 0;
|
|
environ = envinit;
|
|
}
|
|
|
|
|
|
/*
|
|
* start_login(host)
|
|
*
|
|
* Assuming that we are now running as a child processes, this
|
|
* function will turn us into the login process.
|
|
*/
|
|
|
|
#define undef1 __unused
|
|
|
|
void
|
|
start_login(char *host undef1, int autologin undef1, char *name undef1)
|
|
{
|
|
char **argv;
|
|
|
|
scrub_env();
|
|
|
|
/*
|
|
* -h : pass on name of host.
|
|
* WARNING: -h is accepted by login if and only if
|
|
* getuid() == 0.
|
|
* -p : don't clobber the environment (so terminal type stays set).
|
|
*
|
|
* -f : force this login, he has already been authenticated
|
|
*/
|
|
argv = addarg(0, "login");
|
|
|
|
#if !defined(NO_LOGIN_H)
|
|
#endif
|
|
#if !defined(NO_LOGIN_P)
|
|
argv = addarg(argv, "-p");
|
|
#endif
|
|
#ifdef LINEMODE
|
|
/*
|
|
* Set the environment variable "LINEMODE" to either
|
|
* "real" or "kludge" if we are operating in either
|
|
* real or kludge linemode.
|
|
*/
|
|
if (lmodetype == REAL_LINEMODE)
|
|
setenv("LINEMODE", "real", 1);
|
|
# ifdef KLUDGELINEMODE
|
|
else if (lmodetype == KLUDGE_LINEMODE || lmodetype == KLUDGE_OK)
|
|
setenv("LINEMODE", "kludge", 1);
|
|
# endif
|
|
#endif
|
|
#ifdef BFTPDAEMON
|
|
/*
|
|
* Are we working as the bftp daemon? If so, then ask login
|
|
* to start bftp instead of shell.
|
|
*/
|
|
if (bftpd) {
|
|
argv = addarg(argv, "-e");
|
|
argv = addarg(argv, BFTPPATH);
|
|
} else
|
|
#endif
|
|
if (getenv("USER")) {
|
|
argv = addarg(argv, "--");
|
|
argv = addarg(argv, getenv("USER"));
|
|
#if defined(LOGIN_ARGS) && defined(NO_LOGIN_P)
|
|
{
|
|
char **cpp;
|
|
for (cpp = environ; *cpp; cpp++)
|
|
argv = addarg(argv, *cpp);
|
|
}
|
|
#endif
|
|
/*
|
|
* Assume that login will set the USER variable
|
|
* correctly. For SysV systems, this means that
|
|
* USER will no longer be set, just LOGNAME by
|
|
* login. (The problem is that if the auto-login
|
|
* fails, and the user then specifies a different
|
|
* account name, he can get logged in with both
|
|
* LOGNAME and USER in his environment, but the
|
|
* USER value will be wrong.
|
|
*/
|
|
unsetenv("USER");
|
|
}
|
|
closelog();
|
|
|
|
if (altlogin == NULL) {
|
|
altlogin = _PATH_LOGIN;
|
|
}
|
|
execv(altlogin, argv);
|
|
|
|
syslog(LOG_ERR, "%s: %m", altlogin);
|
|
fatalperror(net, altlogin);
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
static char **
|
|
addarg(char **argv, const char *val)
|
|
{
|
|
char **cpp;
|
|
|
|
if (argv == NULL) {
|
|
/*
|
|
* 10 entries, a leading length, and a null
|
|
*/
|
|
argv = (char **)malloc(sizeof(*argv) * 12);
|
|
if (argv == NULL)
|
|
return(NULL);
|
|
*argv++ = (char *)10;
|
|
*argv = (char *)0;
|
|
}
|
|
for (cpp = argv; *cpp; cpp++)
|
|
;
|
|
if (cpp == &argv[(long)argv[-1]]) {
|
|
--argv;
|
|
*argv = (char *)((long)(*argv) + 10);
|
|
argv = (char **)realloc(argv, sizeof(*argv)*((long)(*argv) + 2));
|
|
if (argv == NULL)
|
|
return(NULL);
|
|
argv++;
|
|
cpp = &argv[(long)argv[-1] - 10];
|
|
}
|
|
*cpp++ = strdup(val);
|
|
*cpp = 0;
|
|
return(argv);
|
|
}
|
|
|
|
/*
|
|
* scrub_env()
|
|
*
|
|
* We only accept the environment variables listed below.
|
|
*/
|
|
void
|
|
scrub_env(void)
|
|
{
|
|
static const char *rej[] = {
|
|
"TERMCAP=/",
|
|
NULL
|
|
};
|
|
|
|
static const char *acc[] = {
|
|
"XAUTH=", "XAUTHORITY=", "DISPLAY=",
|
|
"TERM=",
|
|
"EDITOR=",
|
|
"PAGER=",
|
|
"LOGNAME=",
|
|
"POSIXLY_CORRECT=",
|
|
"PRINTER=",
|
|
NULL
|
|
};
|
|
|
|
char **cpp, **cpp2;
|
|
const char **p;
|
|
|
|
for (cpp2 = cpp = environ; *cpp; cpp++) {
|
|
int reject_it = 0;
|
|
|
|
for(p = rej; *p; p++)
|
|
if(strncmp(*cpp, *p, strlen(*p)) == 0) {
|
|
reject_it = 1;
|
|
break;
|
|
}
|
|
if (reject_it)
|
|
continue;
|
|
|
|
for(p = acc; *p; p++)
|
|
if(strncmp(*cpp, *p, strlen(*p)) == 0)
|
|
break;
|
|
if(*p != NULL)
|
|
*cpp2++ = *cpp;
|
|
}
|
|
*cpp2 = NULL;
|
|
}
|
|
|
|
/*
|
|
* cleanup()
|
|
*
|
|
* This is the routine to call when we are all through, to
|
|
* clean up anything that needs to be cleaned up.
|
|
*/
|
|
/* ARGSUSED */
|
|
void
|
|
cleanup(int sig __unused)
|
|
{
|
|
char *p;
|
|
sigset_t mask;
|
|
|
|
p = line + sizeof(_PATH_DEV) - 1;
|
|
/*
|
|
* Block all signals before clearing the utmp entry. We don't want to
|
|
* be called again after calling logout() and then not add the wtmp
|
|
* entry because of not finding the corresponding entry in utmp.
|
|
*/
|
|
sigfillset(&mask);
|
|
sigprocmask(SIG_SETMASK, &mask, NULL);
|
|
if (logout(p))
|
|
logwtmp(p, "", "");
|
|
(void)chmod(line, 0666);
|
|
(void)chown(line, 0, 0);
|
|
*p = 'p';
|
|
(void)chmod(line, 0666);
|
|
(void)chown(line, 0, 0);
|
|
(void) shutdown(net, 2);
|
|
_exit(1);
|
|
}
|