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freebsd-dev/contrib/telnet/telnetd/sys_term.c
Mark Murray 21f083c0a6 Code merge and diff reduce with "base" telnet. This is the "later" 
telnet, so it was treated as the reference code, except where later
commits were made to "base" telnet.
2001-08-20 12:28:40 +00:00

2353 lines
48 KiB
C
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/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static const char sccsid[] = "@(#)sys_term.c 8.4+1 (Berkeley) 5/30/95";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include "telnetd.h"
#include "pathnames.h"
#if defined(AUTHENTICATION)
#include <libtelnet/auth.h>
#endif
extern char *altlogin;
int cleanopen(char *line);
void scrub_env(void);
#if defined(CRAY) || defined(__hpux)
# define PARENT_DOES_UTMP
#endif
#ifdef NEWINIT
#include <initreq.h>
#else /* NEWINIT*/
# ifdef UTMPX
# include <utmpx.h>
struct utmpx wtmp;
# else
# include <utmp.h>
struct utmp wtmp;
# endif /* UTMPX */
# ifndef PARENT_DOES_UTMP
#ifdef _PATH_WTMP
char wtmpf[] = _PATH_WTMP;
#else
char wtmpf[] = "/usr/adm/wtmp";
#endif
#ifdef _PATH_UTMP
char utmpf[] = _PATH_UTMP;
#else
char utmpf[] = "/etc/utmp";
#endif
# else /* PARENT_DOES_UTMP */
char wtmpf[] = "/etc/wtmp";
# endif /* PARENT_DOES_UTMP */
#include <libutil.h>
# ifdef CRAY
#include <tmpdir.h>
#include <sys/wait.h>
# if (UNICOS_LVL == '7.0') || (UNICOS_LVL == '7.1')
# define UNICOS7x
# endif
# ifdef UNICOS7x
#include <sys/sysv.h>
#include <sys/secstat.h>
extern int secflag;
extern struct sysv sysv;
# endif /* UNICOS7x */
# endif /* CRAY */
#endif /* NEWINIT */
#ifdef STREAMSPTY
#include <sac.h>
#include <sys/stropts.h>
#endif
#define SCPYN(a, b) (void) strncpy(a, b, sizeof(a))
#define SCMPN(a, b) strncmp(a, b, sizeof(a))
#ifdef STREAMS
#include <sys/stream.h>
#endif
#ifdef __hpux
#include <sys/resource.h>
#include <sys/proc.h>
#endif
#include <sys/tty.h>
#ifdef t_erase
#undef t_erase
#undef t_kill
#undef t_intrc
#undef t_quitc
#undef t_startc
#undef t_stopc
#undef t_eofc
#undef t_brkc
#undef t_suspc
#undef t_dsuspc
#undef t_rprntc
#undef t_flushc
#undef t_werasc
#undef t_lnextc
#endif
#if defined(UNICOS5) && defined(CRAY2) && !defined(EXTPROC)
# define EXTPROC 0400
#endif
#ifndef USE_TERMIO
struct termbuf {
struct sgttyb sg;
struct tchars tc;
struct ltchars ltc;
int state;
int lflags;
} termbuf, termbuf2;
# define cfsetospeed(tp, val) (tp)->sg.sg_ospeed = (val)
# define cfsetispeed(tp, val) (tp)->sg.sg_ispeed = (val)
# define cfgetospeed(tp) (tp)->sg.sg_ospeed
# define cfgetispeed(tp) (tp)->sg.sg_ispeed
#else /* USE_TERMIO */
# ifdef SYSV_TERMIO
# define termios termio
# endif
# ifndef TCSANOW
# ifdef TCSETS
# define TCSANOW TCSETS
# define TCSADRAIN TCSETSW
# define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
# else
# ifdef TCSETA
# define TCSANOW TCSETA
# define TCSADRAIN TCSETAW
# define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
# else
# define TCSANOW TIOCSETA
# define TCSADRAIN TIOCSETAW
# define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
# endif
# endif
# define tcsetattr(f, a, t) ioctl(f, a, t)
# define cfsetospeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
(tp)->c_cflag |= (val)
# define cfgetospeed(tp) ((tp)->c_cflag & CBAUD)
# ifdef CIBAUD
# define cfsetispeed(tp, val) (tp)->c_cflag &= ~CIBAUD; \
(tp)->c_cflag |= ((val)<<IBSHIFT)
# define cfgetispeed(tp) (((tp)->c_cflag & CIBAUD)>>IBSHIFT)
# else
# define cfsetispeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
(tp)->c_cflag |= (val)
# define cfgetispeed(tp) ((tp)->c_cflag & CBAUD)
# endif
# endif /* TCSANOW */
struct termios termbuf, termbuf2; /* pty control structure */
# ifdef STREAMSPTY
int ttyfd = -1;
# endif
#endif /* USE_TERMIO */
#include <sys/types.h>
#include <libutil.h>
int cleanopen __P((char *));
void scrub_env __P((void));
/*
* init_termbuf()
* copy_termbuf(cp)
* set_termbuf()
*
* These three routines are used to get and set the "termbuf" structure
* to and from the kernel. init_termbuf() gets the current settings.
* copy_termbuf() hands in a new "termbuf" to write to the kernel, and
* set_termbuf() writes the structure into the kernel.
*/
void
init_termbuf()
{
#ifndef USE_TERMIO
(void) ioctl(pty, TIOCGETP, (char *)&termbuf.sg);
(void) ioctl(pty, TIOCGETC, (char *)&termbuf.tc);
(void) ioctl(pty, TIOCGLTC, (char *)&termbuf.ltc);
# ifdef TIOCGSTATE
(void) ioctl(pty, TIOCGSTATE, (char *)&termbuf.state);
# endif
#else
# ifdef STREAMSPTY
(void) tcgetattr(ttyfd, &termbuf);
# else
(void) tcgetattr(pty, &termbuf);
# endif
#endif
termbuf2 = termbuf;
}
#if defined(LINEMODE) && defined(TIOCPKT_IOCTL)
void
copy_termbuf(cp, len)
char *cp;
int len;
{
if (len > sizeof(termbuf))
len = sizeof(termbuf);
memmove((char *)&termbuf, cp, len);
termbuf2 = termbuf;
}
#endif /* defined(LINEMODE) && defined(TIOCPKT_IOCTL) */
void
set_termbuf()
{
/*
* Only make the necessary changes.
*/
#ifndef USE_TERMIO
if (memcmp((char *)&termbuf.sg, (char *)&termbuf2.sg,
sizeof(termbuf.sg)))
(void) ioctl(pty, TIOCSETN, (char *)&termbuf.sg);
if (memcmp((char *)&termbuf.tc, (char *)&termbuf2.tc,
sizeof(termbuf.tc)))
(void) ioctl(pty, TIOCSETC, (char *)&termbuf.tc);
if (memcmp((char *)&termbuf.ltc, (char *)&termbuf2.ltc,
sizeof(termbuf.ltc)))
(void) ioctl(pty, TIOCSLTC, (char *)&termbuf.ltc);
if (termbuf.lflags != termbuf2.lflags)
(void) ioctl(pty, TIOCLSET, (char *)&termbuf.lflags);
#else /* USE_TERMIO */
if (memcmp((char *)&termbuf, (char *)&termbuf2, sizeof(termbuf)))
# ifdef STREAMSPTY
(void) tcsetattr(ttyfd, TCSANOW, &termbuf);
# else
(void) tcsetattr(pty, TCSANOW, &termbuf);
# endif
# if defined(CRAY2) && defined(UNICOS5)
needtermstat = 1;
# endif
#endif /* USE_TERMIO */
}
/*
* spcset(func, valp, valpp)
*
* This function takes various special characters (func), and
* sets *valp to the current value of that character, and
* *valpp to point to where in the "termbuf" structure that
* value is kept.
*
* It returns the SLC_ level of support for this function.
*/
#ifndef USE_TERMIO
int
spcset(func, valp, valpp)
int func;
cc_t *valp;
cc_t **valpp;
{
switch(func) {
case SLC_EOF:
*valp = termbuf.tc.t_eofc;
*valpp = (cc_t *)&termbuf.tc.t_eofc;
return(SLC_VARIABLE);
case SLC_EC:
*valp = termbuf.sg.sg_erase;
*valpp = (cc_t *)&termbuf.sg.sg_erase;
return(SLC_VARIABLE);
case SLC_EL:
*valp = termbuf.sg.sg_kill;
*valpp = (cc_t *)&termbuf.sg.sg_kill;
return(SLC_VARIABLE);
case SLC_IP:
*valp = termbuf.tc.t_intrc;
*valpp = (cc_t *)&termbuf.tc.t_intrc;
return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
case SLC_ABORT:
*valp = termbuf.tc.t_quitc;
*valpp = (cc_t *)&termbuf.tc.t_quitc;
return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
case SLC_XON:
*valp = termbuf.tc.t_startc;
*valpp = (cc_t *)&termbuf.tc.t_startc;
return(SLC_VARIABLE);
case SLC_XOFF:
*valp = termbuf.tc.t_stopc;
*valpp = (cc_t *)&termbuf.tc.t_stopc;
return(SLC_VARIABLE);
case SLC_AO:
*valp = termbuf.ltc.t_flushc;
*valpp = (cc_t *)&termbuf.ltc.t_flushc;
return(SLC_VARIABLE);
case SLC_SUSP:
*valp = termbuf.ltc.t_suspc;
*valpp = (cc_t *)&termbuf.ltc.t_suspc;
return(SLC_VARIABLE);
case SLC_EW:
*valp = termbuf.ltc.t_werasc;
*valpp = (cc_t *)&termbuf.ltc.t_werasc;
return(SLC_VARIABLE);
case SLC_RP:
*valp = termbuf.ltc.t_rprntc;
*valpp = (cc_t *)&termbuf.ltc.t_rprntc;
return(SLC_VARIABLE);
case SLC_LNEXT:
*valp = termbuf.ltc.t_lnextc;
*valpp = (cc_t *)&termbuf.ltc.t_lnextc;
return(SLC_VARIABLE);
case SLC_FORW1:
*valp = termbuf.tc.t_brkc;
*valpp = (cc_t *)&termbuf.ltc.t_lnextc;
return(SLC_VARIABLE);
case SLC_BRK:
case SLC_SYNCH:
case SLC_AYT:
case SLC_EOR:
*valp = (cc_t)0;
*valpp = (cc_t *)0;
return(SLC_DEFAULT);
default:
*valp = (cc_t)0;
*valpp = (cc_t *)0;
return(SLC_NOSUPPORT);
}
}
#else /* USE_TERMIO */
int
spcset(func, valp, valpp)
int func;
cc_t *valp;
cc_t **valpp;
{
#define setval(a, b) *valp = termbuf.c_cc[a]; \
*valpp = &termbuf.c_cc[a]; \
return(b);
#define defval(a) *valp = ((cc_t)a); *valpp = (cc_t *)0; return(SLC_DEFAULT);
switch(func) {
case SLC_EOF:
setval(VEOF, SLC_VARIABLE);
case SLC_EC:
setval(VERASE, SLC_VARIABLE);
case SLC_EL:
setval(VKILL, SLC_VARIABLE);
case SLC_IP:
setval(VINTR, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
case SLC_ABORT:
setval(VQUIT, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
case SLC_XON:
#ifdef VSTART
setval(VSTART, SLC_VARIABLE);
#else
defval(0x13);
#endif
case SLC_XOFF:
#ifdef VSTOP
setval(VSTOP, SLC_VARIABLE);
#else
defval(0x11);
#endif
case SLC_EW:
#ifdef VWERASE
setval(VWERASE, SLC_VARIABLE);
#else
defval(0);
#endif
case SLC_RP:
#ifdef VREPRINT
setval(VREPRINT, SLC_VARIABLE);
#else
defval(0);
#endif
case SLC_LNEXT:
#ifdef VLNEXT
setval(VLNEXT, SLC_VARIABLE);
#else
defval(0);
#endif
case SLC_AO:
#if !defined(VDISCARD) && defined(VFLUSHO)
# define VDISCARD VFLUSHO
#endif
#ifdef VDISCARD
setval(VDISCARD, SLC_VARIABLE|SLC_FLUSHOUT);
#else
defval(0);
#endif
case SLC_SUSP:
#ifdef VSUSP
setval(VSUSP, SLC_VARIABLE|SLC_FLUSHIN);
#else
defval(0);
#endif
#ifdef VEOL
case SLC_FORW1:
setval(VEOL, SLC_VARIABLE);
#endif
#ifdef VEOL2
case SLC_FORW2:
setval(VEOL2, SLC_VARIABLE);
#endif
case SLC_AYT:
#ifdef VSTATUS
setval(VSTATUS, SLC_VARIABLE);
#else
defval(0);
#endif
case SLC_BRK:
case SLC_SYNCH:
case SLC_EOR:
defval(0);
default:
*valp = 0;
*valpp = 0;
return(SLC_NOSUPPORT);
}
}
#endif /* USE_TERMIO */
#ifdef CRAY
/*
* getnpty()
*
* Return the number of pty's configured into the system.
*/
int
getnpty()
{
#ifdef _SC_CRAY_NPTY
int numptys;
if ((numptys = sysconf(_SC_CRAY_NPTY)) != -1)
return numptys;
else
#endif /* _SC_CRAY_NPTY */
return 128;
}
#endif /* CRAY */
#ifndef convex
/*
* getpty()
*
* Allocate a pty. As a side effect, the external character
* array "line" contains the name of the slave side.
*
* Returns the file descriptor of the opened pty.
*/
#ifdef CRAY
char myline[16];
#else
char line[16];
#endif /* CRAY */
int
getpty(ptynum)
int *ptynum;
{
register int p;
#ifdef STREAMSPTY
int t;
char *ptsname();
p = open("/dev/ptmx", 2);
if (p > 0) {
grantpt(p);
unlockpt(p);
strcpy(line, ptsname(p));
return(p);
}
#else /* ! STREAMSPTY */
#ifndef CRAY
register char *cp, *p1, *p2;
register int i;
#if defined(sun) && defined(TIOCGPGRP) && BSD < 199207
int dummy;
#endif
#ifndef __hpux
(void) strcpy(line, _PATH_DEV);
(void) strcat(line, "ptyXX");
p1 = &line[8];
p2 = &line[9];
#else
(void) strcpy(line, "/dev/ptym/ptyXX");
p1 = &line[13];
p2 = &line[14];
#endif
for (cp = "pqrsPQRS"; *cp; cp++) {
struct stat stb;
*p1 = *cp;
*p2 = '0';
/*
* This stat() check is just to keep us from
* looping through all 256 combinations if there
* aren't that many ptys available.
*/
if (stat(line, &stb) < 0)
break;
for (i = 0; i < 32; i++) {
*p2 = "0123456789abcdefghijklmnopqrstuv"[i];
p = open(line, 2);
if (p > 0) {
#ifndef __hpux
line[5] = 't';
#else
for (p1 = &line[8]; *p1; p1++)
*p1 = *(p1+1);
line[9] = 't';
#endif
chown(line, 0, 0);
chmod(line, 0600);
#if defined(sun) && defined(TIOCGPGRP) && BSD < 199207
if (ioctl(p, TIOCGPGRP, &dummy) == 0
|| errno != EIO) {
chmod(line, 0666);
close(p);
line[5] = 'p';
} else
#endif /* defined(sun) && defined(TIOCGPGRP) && BSD < 199207 */
return(p);
}
}
}
#else /* CRAY */
extern lowpty, highpty;
struct stat sb;
for (*ptynum = lowpty; *ptynum <= highpty; (*ptynum)++) {
(void) sprintf(myline, "%spty/%03d", _PATH_DEV, *ptynum);
p = open(myline, 2);
if (p < 0)
continue;
(void) sprintf(line, "%sp%03d", _PATH_TTY, *ptynum);
/*
* Here are some shenanigans to make sure that there
* are no listeners lurking on the line.
*/
if(stat(line, &sb) < 0) {
(void) close(p);
continue;
}
if(sb.st_uid || sb.st_gid || sb.st_mode != 0600) {
chown(line, 0, 0);
chmod(line, 0600);
(void)close(p);
p = open(myline, 2);
if (p < 0)
continue;
}
/*
* Now it should be safe...check for accessability.
*/
if (access(line, 6) == 0)
return(p);
else {
/* no tty side to pty so skip it */
(void) close(p);
}
}
#endif /* CRAY */
#endif /* STREAMSPTY */
return(-1);
}
#endif /* convex */
#ifdef LINEMODE
/*
* tty_flowmode() Find out if flow control is enabled or disabled.
* tty_linemode() Find out if linemode (external processing) is enabled.
* tty_setlinemod(on) Turn on/off linemode.
* tty_isecho() Find out if echoing is turned on.
* tty_setecho(on) Enable/disable character echoing.
* tty_israw() Find out if terminal is in RAW mode.
* tty_binaryin(on) Turn on/off BINARY on input.
* tty_binaryout(on) Turn on/off BINARY on output.
* tty_isediting() Find out if line editing is enabled.
* tty_istrapsig() Find out if signal trapping is enabled.
* tty_setedit(on) Turn on/off line editing.
* tty_setsig(on) Turn on/off signal trapping.
* tty_issofttab() Find out if tab expansion is enabled.
* tty_setsofttab(on) Turn on/off soft tab expansion.
* tty_islitecho() Find out if typed control chars are echoed literally
* tty_setlitecho() Turn on/off literal echo of control chars
* tty_tspeed(val) Set transmit speed to val.
* tty_rspeed(val) Set receive speed to val.
*/
#ifdef convex
static int linestate;
#endif
int
tty_linemode()
{
#ifndef convex
#ifndef USE_TERMIO
return(termbuf.state & TS_EXTPROC);
#else
return(termbuf.c_lflag & EXTPROC);
#endif
#else
return(linestate);
#endif
}
void
tty_setlinemode(on)
int on;
{
#ifdef TIOCEXT
# ifndef convex
set_termbuf();
# else
linestate = on;
# endif
(void) ioctl(pty, TIOCEXT, (char *)&on);
# ifndef convex
init_termbuf();
# endif
#else /* !TIOCEXT */
# ifdef EXTPROC
if (on)
termbuf.c_lflag |= EXTPROC;
else
termbuf.c_lflag &= ~EXTPROC;
# endif
#endif /* TIOCEXT */
}
#endif /* LINEMODE */
int
tty_isecho()
{
#ifndef USE_TERMIO
return (termbuf.sg.sg_flags & ECHO);
#else
return (termbuf.c_lflag & ECHO);
#endif
}
int
tty_flowmode()
{
#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()
{
#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(on)
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()
{
#ifndef USE_TERMIO
return(termbuf.sg.sg_flags & RAW);
#else
return(!(termbuf.c_lflag & ICANON));
#endif
}
#if defined (AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R)
int
tty_setraw(on)
{
# ifndef USE_TERMIO
if (on)
termbuf.sg.sg_flags |= RAW;
else
termbuf.sg.sg_flags &= ~RAW;
# else
if (on)
termbuf.c_lflag &= ~ICANON;
else
termbuf.c_lflag |= ICANON;
# endif
}
#endif
void
tty_binaryin(on)
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(on)
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()
{
#ifndef USE_TERMIO
return(termbuf.lflags & LPASS8);
#else
return(!(termbuf.c_iflag & ISTRIP));
#endif
}
int
tty_isbinaryout()
{
#ifndef USE_TERMIO
return(termbuf.lflags & LLITOUT);
#else
return(!(termbuf.c_oflag&OPOST));
#endif
}
#ifdef LINEMODE
int
tty_isediting()
{
#ifndef USE_TERMIO
return(!(termbuf.sg.sg_flags & (CBREAK|RAW)));
#else
return(termbuf.c_lflag & ICANON);
#endif
}
int
tty_istrapsig()
{
#ifndef USE_TERMIO
return(!(termbuf.sg.sg_flags&RAW));
#else
return(termbuf.c_lflag & ISIG);
#endif
}
void
tty_setedit(on)
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(on)
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()
{
#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(on)
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()
{
#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(on)
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()
{
#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(val)
int val;
{
#ifdef DECODE_BAUD
register 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(val)
int val;
{
#ifdef DECODE_BAUD
register 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 */
}
#if defined(CRAY2) && defined(UNICOS5)
int
tty_isnewmap()
{
return((termbuf.c_oflag & OPOST) && (termbuf.c_oflag & ONLCR) &&
!(termbuf.c_oflag & ONLRET));
}
#endif
#ifdef PARENT_DOES_UTMP
# ifndef NEWINIT
extern struct utmp wtmp;
extern char wtmpf[];
# else /* NEWINIT */
int gotalarm;
/* ARGSUSED */
void
nologinproc(sig)
int sig;
{
gotalarm++;
}
# endif /* NEWINIT */
#endif /* PARENT_DOES_UTMP */
#ifndef NEWINIT
# ifdef PARENT_DOES_UTMP
extern void utmp_sig_init P((void));
extern void utmp_sig_reset P((void));
extern void utmp_sig_wait P((void));
extern void utmp_sig_notify P((int));
# endif /* PARENT_DOES_UTMP */
#endif
/*
* getptyslave()
*
* Open the slave side of the pty, and do any initialization
* that is necessary.
*/
void
getptyslave()
{
register int t = -1;
char erase;
#if !defined(CRAY) || !defined(NEWINIT)
# 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
# ifdef PARENT_DOES_UTMP
/*
* Wait for our parent to get the utmp stuff to get done.
*/
utmp_sig_wait();
# endif
t = cleanopen(line);
if (t < 0)
fatalperror(net, line);
#ifdef STREAMSPTY
#ifdef USE_TERMIO
ttyfd = t;
#endif
if (ioctl(t, I_PUSH, "ptem") < 0)
fatal(net, "I_PUSH ptem");
if (ioctl(t, I_PUSH, "ldterm") < 0)
fatal(net, "I_PUSH ldterm");
if (ioctl(t, I_PUSH, "ttcompat") < 0)
fatal(net, "I_PUSH ttcompat");
if (ioctl(pty, I_PUSH, "pckt") < 0)
fatal(net, "I_PUSH pckt");
#endif
/*
* 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 UNICOS (and HPUX)
*/
# if defined(CRAY) || defined(__hpux)
termbuf.c_oflag = OPOST|ONLCR|TAB3;
termbuf.c_iflag = IGNPAR|ISTRIP|ICRNL|IXON;
termbuf.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK;
termbuf.c_cflag = EXTB|HUPCL|CS8;
# endif
/*
* Settings for all other termios/termio based
* systems, other than 4.4BSD. In 4.4BSD the
* kernel does the initial terminal setup.
*/
# if defined(USE_TERMIO) && !(defined(CRAY) || defined(__hpux)) && (BSD <= 43)
# ifndef OXTABS
# define OXTABS 0
# endif
termbuf.c_lflag |= ECHO;
termbuf.c_oflag |= ONLCR|OXTABS;
termbuf.c_iflag |= ICRNL;
termbuf.c_iflag &= ~IXOFF;
# endif /* defined(USE_TERMIO) && !defined(CRAY) && (BSD <= 43) */
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");
#endif /* !defined(CRAY) || !defined(NEWINIT) */
if (net > 2)
(void) close(net);
#if defined(AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R)
/*
* Leave the pty open so that we can write out the rlogin
* protocol for /bin/login, if the authentication works.
*/
#else
if (pty > 2) {
(void) close(pty);
pty = -1;
}
#endif
}
#if !defined(CRAY) || !defined(NEWINIT)
#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(line)
char *line;
{
register int t;
#ifdef UNICOS7x
struct secstat secbuf;
#endif /* UNICOS7x */
#ifndef STREAMSPTY
/*
* Make sure that other people can't open the
* slave side of the connection.
*/
(void) chown(line, 0, 0);
(void) chmod(line, 0600);
#endif
# if !defined(CRAY) && (BSD > 43)
(void) revoke(line);
# endif
#ifdef UNICOS7x
if (secflag) {
if (secstat(line, &secbuf) < 0)
return(-1);
if (setulvl(secbuf.st_slevel) < 0)
return(-1);
if (setucmp(secbuf.st_compart) < 0)
return(-1);
}
#endif /* UNICOS7x */
t = open(line, O_RDWR|O_NOCTTY);
#ifdef UNICOS7x
if (secflag) {
if (setulvl(sysv.sy_minlvl) < 0)
return(-1);
if (setucmp(0) < 0)
return(-1);
}
#endif /* UNICOS7x */
if (t < 0)
return(-1);
/*
* Hangup anybody else using this ttyp, then reopen it for
* ourselves.
*/
# if !(defined(CRAY) || defined(__hpux)) && (BSD <= 43) && !defined(STREAMSPTY)
(void) signal(SIGHUP, SIG_IGN);
vhangup();
(void) signal(SIGHUP, SIG_DFL);
t = open(line, O_RDWR|O_NOCTTY);
if (t < 0)
return(-1);
# endif
# if defined(CRAY) && defined(TCVHUP)
{
register int i;
(void) signal(SIGHUP, SIG_IGN);
(void) ioctl(t, TCVHUP, (char *)0);
(void) signal(SIGHUP, SIG_DFL);
setpgrp();
#ifdef UNICOS7x
if (secflag) {
if (secstat(line, &secbuf) < 0)
return(-1);
if (setulvl(secbuf.st_slevel) < 0)
return(-1);
if (setucmp(secbuf.st_compart) < 0)
return(-1);
}
#endif /* UNICOS7x */
i = open(line, O_RDWR);
#ifdef UNICOS7x
if (secflag) {
if (setulvl(sysv.sy_minlvl) < 0)
return(-1);
if (setucmp(0) < 0)
return(-1);
}
#endif /* UNICOS7x */
if (i < 0)
return(-1);
(void) close(t);
t = i;
}
# endif /* defined(CRAY) && defined(TCVHUP) */
return(t);
}
#endif /* !defined(CRAY) || !defined(NEWINIT) */
#if BSD <= 43
int
login_tty(t)
int t;
{
if (setsid() < 0) {
#ifdef ultrix
/*
* The setsid() may have failed because we
* already have a pgrp == pid. Zero out
* our pgrp and try again...
*/
if ((setpgrp(0, 0) < 0) || (setsid() < 0))
#endif
fatalperror(net, "setsid()");
}
# ifdef TIOCSCTTY
if (ioctl(t, TIOCSCTTY, (char *)0) < 0)
fatalperror(net, "ioctl(sctty)");
# if defined(CRAY)
/*
* Close the hard fd to /dev/ttypXXX, and re-open through
* the indirect /dev/tty interface.
*/
close(t);
if ((t = open(_PATH_TTY, O_RDWR)) < 0)
fatalperror(net, "open(/dev/tty)");
# endif
# else
/*
* We get our controlling tty assigned as a side-effect
* of opening up a tty device. But on BSD based systems,
* this only happens if our process group is zero. The
* setsid() call above may have set our pgrp, so clear
* it out before opening the tty...
*/
# ifndef SOLARIS
(void) setpgrp(0, 0);
# else
(void) setpgrp();
# endif
close(open(line, O_RDWR));
# endif
if (t != 0)
(void) dup2(t, 0);
if (t != 1)
(void) dup2(t, 1);
if (t != 2)
(void) dup2(t, 2);
if (t > 2)
close(t);
return(0);
}
#endif /* BSD <= 43 */
#ifdef NEWINIT
char *gen_id = "fe";
#endif
/*
* startslave(host)
*
* Given a hostname, do whatever
* is necessary to startup the login process on the slave side of the pty.
*/
/* ARGSUSED */
void
startslave(host, autologin, autoname)
char *host;
int autologin;
char *autoname;
{
register int i;
#ifdef NEWINIT
extern char *ptyip;
struct init_request request;
void nologinproc();
register int n;
#endif /* NEWINIT */
#if defined(AUTHENTICATION)
if (!autoname || !autoname[0])
autologin = 0;
if (autologin < auth_level) {
fatal(net, "Authorization failed");
exit(1);
}
#endif
#ifndef NEWINIT
# ifdef PARENT_DOES_UTMP
utmp_sig_init();
# endif /* PARENT_DOES_UTMP */
if ((i = fork()) < 0)
fatalperror(net, "fork");
if (i) {
# ifdef PARENT_DOES_UTMP
/*
* Cray parent will create utmp entry for child and send
* signal to child to tell when done. Child waits for signal
* before doing anything important.
*/
register int pid = i;
void sigjob P((int));
setpgrp();
utmp_sig_reset(); /* reset handler to default */
/*
* Create utmp entry for child
*/
(void) time(&wtmp.ut_time);
wtmp.ut_type = LOGIN_PROCESS;
wtmp.ut_pid = pid;
SCPYN(wtmp.ut_user, "LOGIN");
SCPYN(wtmp.ut_host, host);
SCPYN(wtmp.ut_line, line + sizeof(_PATH_DEV) - 1);
#ifndef __hpux
SCPYN(wtmp.ut_id, wtmp.ut_line+3);
#else
SCPYN(wtmp.ut_id, wtmp.ut_line+7);
#endif
pututline(&wtmp);
endutent();
if ((i = open(wtmpf, O_WRONLY|O_APPEND)) >= 0) {
(void) write(i, (char *)&wtmp, sizeof(struct utmp));
(void) close(i);
}
#ifdef CRAY
(void) signal(WJSIGNAL, sigjob);
#endif
utmp_sig_notify(pid);
# endif /* PARENT_DOES_UTMP */
} else {
getptyslave(autologin);
start_login(host, autologin, autoname);
/*NOTREACHED*/
}
#else /* NEWINIT */
/*
* Init will start up login process if we ask nicely. We only wait
* for it to start up and begin normal telnet operation.
*/
if ((i = open(INIT_FIFO, O_WRONLY)) < 0) {
char tbuf[128];
(void) snprintf(tbuf, sizeof(tbuf), "Can't open %s\n", INIT_FIFO);
fatalperror(net, tbuf);
}
memset((char *)&request, 0, sizeof(request));
request.magic = INIT_MAGIC;
SCPYN(request.gen_id, gen_id);
SCPYN(request.tty_id, &line[8]);
SCPYN(request.host, host);
SCPYN(request.term_type, terminaltype ? terminaltype : "network");
#if !defined(UNICOS5)
request.signal = SIGCLD;
request.pid = getpid();
#endif
#ifdef BFTPDAEMON
/*
* Are we working as the bftp daemon?
*/
if (bftpd) {
SCPYN(request.exec_name, BFTPPATH);
}
#endif /* BFTPDAEMON */
if (write(i, (char *)&request, sizeof(request)) < 0) {
char tbuf[128];
(void) snprintf(tbuf, sizeof(tbuf), "Can't write to %s\n", INIT_FIFO);
fatalperror(net, tbuf);
}
(void) close(i);
(void) signal(SIGALRM, nologinproc);
for (i = 0; ; i++) {
char tbuf[128];
alarm(15);
n = read(pty, ptyip, BUFSIZ);
if (i == 3 || n >= 0 || !gotalarm)
break;
gotalarm = 0;
snprintf(tbuf, sizeof(tbuf), "telnetd: waiting for /etc/init to start login process on %s\r\n", line);
(void) write(net, tbuf, strlen(tbuf));
}
if (n < 0 && gotalarm)
fatal(net, "/etc/init didn't start login process");
pcc += n;
alarm(0);
(void) signal(SIGALRM, SIG_DFL);
return;
#endif /* NEWINIT */
}
char *envinit[3];
extern char **environ;
void
init_env()
{
extern char *getenv();
char **envp;
envp = envinit;
if ((*envp = getenv("TZ")))
*envp++ -= 3;
#if defined(CRAY) || defined(__hpux)
else
*envp++ = "TZ=GMT0";
#endif
*envp = 0;
environ = envinit;
}
#ifndef NEWINIT
/*
* start_login(host)
*
* Assuming that we are now running as a child processes, this
* function will turn us into the login process.
*/
void
start_login(host, autologin, name)
char *host;
int autologin;
char *name;
{
register char **argv;
char **addarg(), *user;
extern char *getenv();
#ifdef UTMPX
register int pid = getpid();
struct utmpx utmpx;
#endif
#ifdef SOLARIS
char *term;
char termbuf[64];
#endif
#ifdef UTMPX
/*
* Create utmp entry for child
*/
memset(&utmpx, 0, sizeof(utmpx));
SCPYN(utmpx.ut_user, ".telnet");
SCPYN(utmpx.ut_line, line + sizeof(_PATH_DEV) - 1);
utmpx.ut_pid = pid;
utmpx.ut_id[0] = 't';
utmpx.ut_id[1] = 'n';
utmpx.ut_id[2] = SC_WILDC;
utmpx.ut_id[3] = SC_WILDC;
utmpx.ut_type = LOGIN_PROCESS;
(void) time(&utmpx.ut_tv.tv_sec);
if (makeutx(&utmpx) == NULL)
fatal(net, "makeutx failed");
#endif
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)
# if defined (AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R)
/*
* Don't add the "-h host" option if we are going
* to be adding the "-r host" option down below...
*/
if ((auth_level < 0) || (autologin != AUTH_VALID))
# endif
{
argv = addarg(argv, "-h");
argv = addarg(argv, host);
#ifdef SOLARIS
/*
* SVR4 version of -h takes TERM= as second arg, or -
*/
term = getenv("TERM");
if (term == NULL || term[0] == 0) {
term = "-";
} else {
strcpy(termbuf, "TERM=");
strncat(termbuf, term, sizeof(termbuf) - 6);
term = termbuf;
}
argv = addarg(argv, term);
#endif
}
#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 defined (SecurID)
/*
* don't worry about the -f that might get sent.
* A -s is supposed to override it anyhow.
*/
if (require_SecurID)
argv = addarg(argv, "-s");
#endif
#if defined (AUTHENTICATION)
if (auth_level >= 0 && autologin == AUTH_VALID) {
# if !defined(NO_LOGIN_F)
argv = addarg(argv, "-f");
argv = addarg(argv, "--");
argv = addarg(argv, name);
# else
# if defined(LOGIN_R)
/*
* We don't have support for "login -f", but we
* can fool /bin/login into thinking that we are
* rlogind, and allow us to log in without a
* password. The rlogin protocol expects
* local-user\0remote-user\0term/speed\0
*/
if (pty > 2) {
register char *cp;
char speed[128];
int isecho, israw, xpty, len;
extern int def_rspeed;
# ifndef LOGIN_HOST
/*
* Tell login that we are coming from "localhost".
* If we passed in the real host name, then the
* user would have to allow .rhost access from
* every machine that they want authenticated
* access to work from, which sort of defeats
* the purpose of an authenticated login...
* So, we tell login that the session is coming
* from "localhost", and the user will only have
* to have "localhost" in their .rhost file.
*/
# define LOGIN_HOST "localhost"
# endif
argv = addarg(argv, "-r");
argv = addarg(argv, LOGIN_HOST);
xpty = pty;
# ifndef STREAMSPTY
pty = 0;
# else
ttyfd = 0;
# endif
init_termbuf();
isecho = tty_isecho();
israw = tty_israw();
if (isecho || !israw) {
tty_setecho(0); /* Turn off echo */
tty_setraw(1); /* Turn on raw */
set_termbuf();
}
len = strlen(name)+1;
write(xpty, name, len);
write(xpty, name, len);
snprintf(speed, sizeof(speed),
"%s/%d", (cp = getenv("TERM")) ? cp : "",
(def_rspeed > 0) ? def_rspeed : 9600);
len = strlen(speed)+1;
write(xpty, speed, len);
if (isecho || !israw) {
init_termbuf();
tty_setecho(isecho);
tty_setraw(israw);
set_termbuf();
if (!israw) {
/*
* Write a newline to ensure
* that login will be able to
* read the line...
*/
write(xpty, "\n", 1);
}
}
pty = xpty;
}
# else
argv = addarg(argv, "--");
argv = addarg(argv, name);
# endif
# endif
} else
#endif
if (getenv("USER")) {
argv = addarg(argv, "--");
argv = addarg(argv, getenv("USER"));
#if defined(LOGIN_ARGS) && defined(NO_LOGIN_P)
{
register 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");
}
#ifdef SOLARIS
else {
char **p;
argv = addarg(argv, ""); /* no login name */
for (p = environ; *p; p++) {
argv = addarg(argv, *p);
}
}
#endif /* SOLARIS */
#if defined(AUTHENTICATION) && defined(NO_LOGIN_F) && defined(LOGIN_R)
if (pty > 2)
close(pty);
#endif
closelog();
if (altlogin == NULL) {
altlogin = _PATH_LOGIN;
}
execv(altlogin, argv);
syslog(LOG_ERR, "%s: %m", altlogin);
fatalperror(net, altlogin);
/*NOTREACHED*/
}
char **
addarg(argv, val)
register char **argv;
register char *val;
{
register 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[(int)argv[-1]]) {
--argv;
*argv = (char *)((int)(*argv) + 10);
argv = (char **)realloc(argv, sizeof(*argv)*((int)(*argv) + 2));
if (argv == NULL)
return(NULL);
argv++;
cpp = &argv[(int)argv[-1] - 10];
}
*cpp++ = val;
*cpp = 0;
return(argv);
}
#endif /* NEWINIT */
/*
* scrub_env()
*
* We only accept the environment variables listed below.
*/
void
scrub_env()
{
static const char *reject[] = {
"TERMCAP=/",
NULL
};
static const char *accept[] = {
"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 = reject; *p; p++)
if(strncmp(*cpp, *p, strlen(*p)) == 0) {
reject_it = 1;
break;
}
if (reject_it)
continue;
for(p = accept; *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(sig)
int sig;
{
#ifndef PARENT_DOES_UTMP
# if (BSD > 43) || defined(convex)
char *p;
p = line + sizeof(_PATH_DEV) - 1;
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);
# else
void rmut();
rmut();
vhangup(); /* XXX */
(void) shutdown(net, 2);
exit(1);
# endif
#else /* PARENT_DOES_UTMP */
# ifdef NEWINIT
(void) shutdown(net, 2);
exit(1);
# else /* NEWINIT */
# ifdef CRAY
static int incleanup = 0;
register int t;
int child_status; /* status of child process as returned by waitpid */
int flags = WNOHANG|WUNTRACED;
/*
* 1: Pick up the zombie, if we are being called
* as the signal handler.
* 2: If we are a nested cleanup(), return.
* 3: Try to clean up TMPDIR.
* 4: Fill in utmp with shutdown of process.
* 5: Close down the network and pty connections.
* 6: Finish up the TMPDIR cleanup, if needed.
*/
if (sig == SIGCHLD) {
while (waitpid(-1, &child_status, flags) > 0)
; /* VOID */
/* Check if the child process was stopped
* rather than exited. We want cleanup only if
* the child has died.
*/
if (WIFSTOPPED(child_status)) {
return;
}
}
t = sigblock(sigmask(SIGCHLD));
if (incleanup) {
sigsetmask(t);
return;
}
incleanup = 1;
sigsetmask(t);
#ifdef UNICOS7x
if (secflag) {
/*
* We need to set ourselves back to a null
* label to clean up.
*/
setulvl(sysv.sy_minlvl);
setucmp((long)0);
}
#endif /* UNICOS7x */
t = cleantmp(&wtmp);
setutent(); /* just to make sure */
# endif /* CRAY */
rmut(line);
close(pty);
(void) shutdown(net, 2);
# ifdef CRAY
if (t == 0)
cleantmp(&wtmp);
# endif /* CRAY */
exit(1);
# endif /* NEWINT */
#endif /* PARENT_DOES_UTMP */
}
#if defined(PARENT_DOES_UTMP) && !defined(NEWINIT)
/*
* _utmp_sig_rcv
* utmp_sig_init
* utmp_sig_wait
* These three functions are used to coordinate the handling of
* the utmp file between the server and the soon-to-be-login shell.
* The server actually creates the utmp structure, the child calls
* utmp_sig_wait(), until the server calls utmp_sig_notify() and
* signals the future-login shell to proceed.
*/
static int caught=0; /* NZ when signal intercepted */
static void (*func)(); /* address of previous handler */
void
_utmp_sig_rcv(sig)
int sig;
{
caught = 1;
(void) signal(SIGUSR1, func);
}
void
utmp_sig_init()
{
/*
* register signal handler for UTMP creation
*/
if ((int)(func = signal(SIGUSR1, _utmp_sig_rcv)) == -1)
fatalperror(net, "telnetd/signal");
}
void
utmp_sig_reset()
{
(void) signal(SIGUSR1, func); /* reset handler to default */
}
# ifdef __hpux
# define sigoff() /* do nothing */
# define sigon() /* do nothing */
# endif
void
utmp_sig_wait()
{
/*
* Wait for parent to write our utmp entry.
*/
sigoff();
while (caught == 0) {
pause(); /* wait until we get a signal (sigon) */
sigoff(); /* turn off signals while we check caught */
}
sigon(); /* turn on signals again */
}
void
utmp_sig_notify(pid)
{
kill(pid, SIGUSR1);
}
# ifdef CRAY
static int gotsigjob = 0;
/*ARGSUSED*/
void
sigjob(sig)
int sig;
{
register int jid;
register struct jobtemp *jp;
while ((jid = waitjob(NULL)) != -1) {
if (jid == 0) {
return;
}
gotsigjob++;
jobend(jid, NULL, NULL);
}
}
/*
* jid_getutid:
* called by jobend() before calling cleantmp()
* to find the correct $TMPDIR to cleanup.
*/
struct utmp *
jid_getutid(jid)
int jid;
{
struct utmp *cur = NULL;
setutent(); /* just to make sure */
while (cur = getutent()) {
if ( (cur->ut_type != NULL) && (jid == cur->ut_jid) ) {
return(cur);
}
}
return(0);
}
/*
* Clean up the TMPDIR that login created.
* The first time this is called we pick up the info
* from the utmp. If the job has already gone away,
* then we'll clean up and be done. If not, then
* when this is called the second time it will wait
* for the signal that the job is done.
*/
int
cleantmp(wtp)
register struct utmp *wtp;
{
struct utmp *utp;
static int first = 1;
register int mask, omask, ret;
extern struct utmp *getutid P((const struct utmp *_Id));
mask = sigmask(WJSIGNAL);
if (first == 0) {
omask = sigblock(mask);
while (gotsigjob == 0)
sigpause(omask);
return(1);
}
first = 0;
setutent(); /* just to make sure */
utp = getutid(wtp);
if (utp == 0) {
syslog(LOG_ERR, "can't get /etc/utmp entry to clean TMPDIR");
return(-1);
}
/*
* Nothing to clean up if the user shell was never started.
*/
if (utp->ut_type != USER_PROCESS || utp->ut_jid == 0)
return(1);
/*
* Block the WJSIGNAL while we are in jobend().
*/
omask = sigblock(mask);
ret = jobend(utp->ut_jid, utp->ut_tpath, utp->ut_user);
sigsetmask(omask);
return(ret);
}
int
jobend(jid, path, user)
register int jid;
register char *path;
register char *user;
{
static int saved_jid = 0;
static int pty_saved_jid = 0;
static char saved_path[sizeof(wtmp.ut_tpath)+1];
static char saved_user[sizeof(wtmp.ut_user)+1];
/*
* this little piece of code comes into play
* only when ptyreconnect is used to reconnect
* to an previous session.
*
* this is the only time when the
* "saved_jid != jid" code is executed.
*/
if ( saved_jid && saved_jid != jid ) {
if (!path) { /* called from signal handler */
pty_saved_jid = jid;
} else {
pty_saved_jid = saved_jid;
}
}
if (path) {
strncpy(saved_path, path, sizeof(wtmp.ut_tpath));
strncpy(saved_user, user, sizeof(wtmp.ut_user));
saved_path[sizeof(saved_path)] = '\0';
saved_user[sizeof(saved_user)] = '\0';
}
if (saved_jid == 0) {
saved_jid = jid;
return(0);
}
/* if the jid has changed, get the correct entry from the utmp file */
if ( saved_jid != jid ) {
struct utmp *utp = NULL;
struct utmp *jid_getutid();
utp = jid_getutid(pty_saved_jid);
if (utp == 0) {
syslog(LOG_ERR, "Can't get /etc/utmp entry to clean TMPDIR");
return(-1);
}
cleantmpdir(jid, utp->ut_tpath, utp->ut_user);
return(1);
}
cleantmpdir(jid, saved_path, saved_user);
return(1);
}
/*
* Fork a child process to clean up the TMPDIR
*/
cleantmpdir(jid, tpath, user)
register int jid;
register char *tpath;
register char *user;
{
switch(fork()) {
case -1:
syslog(LOG_ERR, "TMPDIR cleanup(%s): fork() failed: %m",
tpath);
break;
case 0:
execl(CLEANTMPCMD, CLEANTMPCMD, user, tpath, (char *)0);
syslog(LOG_ERR, "TMPDIR cleanup(%s): execl(%s) failed: %m",
tpath, CLEANTMPCMD);
exit(1);
default:
/*
* Forget about child. We will exit, and
* /etc/init will pick it up.
*/
break;
}
}
# endif /* CRAY */
#endif /* defined(PARENT_DOES_UTMP) && !defined(NEWINIT) */
/*
* rmut()
*
* This is the function called by cleanup() to
* remove the utmp entry for this person.
*/
#ifdef UTMPX
void
rmut()
{
register f;
int found = 0;
struct utmp *u, *utmp;
int nutmp;
struct stat statbf;
struct utmpx *utxp, utmpx;
/*
* This updates the utmpx and utmp entries and make a wtmp/x entry
*/
SCPYN(utmpx.ut_line, line + sizeof(_PATH_DEV) - 1);
utxp = getutxline(&utmpx);
if (utxp) {
utxp->ut_type = DEAD_PROCESS;
utxp->ut_exit.e_termination = 0;
utxp->ut_exit.e_exit = 0;
(void) time(&utmpx.ut_tv.tv_sec);
utmpx.ut_tv.tv_usec = 0;
modutx(utxp);
}
endutxent();
} /* end of rmut */
#endif
#if !defined(UTMPX) && !(defined(CRAY) || defined(__hpux)) && BSD <= 43
void
rmut()
{
register f;
int found = 0;
struct utmp *u, *utmp;
int nutmp;
struct stat statbf;
f = open(utmpf, O_RDWR);
if (f >= 0) {
(void) fstat(f, &statbf);
utmp = (struct utmp *)malloc((unsigned)statbf.st_size);
if (!utmp)
syslog(LOG_ERR, "utmp malloc failed");
if (statbf.st_size && utmp) {
nutmp = read(f, (char *)utmp, (int)statbf.st_size);
nutmp /= sizeof(struct utmp);
for (u = utmp ; u < &utmp[nutmp] ; u++) {
if (SCMPN(u->ut_line, line+5) ||
u->ut_name[0]==0)
continue;
(void) lseek(f, ((long)u)-((long)utmp), L_SET);
SCPYN(u->ut_name, "");
SCPYN(u->ut_host, "");
(void) time(&u->ut_time);
(void) write(f, (char *)u, sizeof(wtmp));
found++;
}
}
(void) close(f);
}
if (found) {
f = open(wtmpf, O_WRONLY|O_APPEND);
if (f >= 0) {
SCPYN(wtmp.ut_line, line+5);
SCPYN(wtmp.ut_name, "");
SCPYN(wtmp.ut_host, "");
(void) time(&wtmp.ut_time);
(void) write(f, (char *)&wtmp, sizeof(wtmp));
(void) close(f);
}
}
(void) chmod(line, 0666);
(void) chown(line, 0, 0);
line[strlen(_PATH_DEV)] = 'p';
(void) chmod(line, 0666);
(void) chown(line, 0, 0);
} /* end of rmut */
#endif /* CRAY */
#ifdef __hpux
rmut (line)
char *line;
{
struct utmp utmp;
struct utmp *utptr;
int fd; /* for /etc/wtmp */
utmp.ut_type = USER_PROCESS;
(void) strncpy(utmp.ut_id, line+12, sizeof(utmp.ut_id));
(void) setutent();
utptr = getutid(&utmp);
/* write it out only if it exists */
if (utptr) {
utptr->ut_type = DEAD_PROCESS;
utptr->ut_time = time((long *) 0);
(void) pututline(utptr);
/* set wtmp entry if wtmp file exists */
if ((fd = open(wtmpf, O_WRONLY | O_APPEND)) >= 0) {
(void) write(fd, utptr, sizeof(utmp));
(void) close(fd);
}
}
(void) endutent();
(void) chmod(line, 0666);
(void) chown(line, 0, 0);
line[14] = line[13];
line[13] = line[12];
line[8] = 'm';
line[9] = '/';
line[10] = 'p';
line[11] = 't';
line[12] = 'y';
(void) chmod(line, 0666);
(void) chown(line, 0, 0);
}
#endif
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