Source Code 1994 March/Source_Code_CD-ROM_Walnut_Creek_March_1994.iso/compsrcs/unix/volume26/screen35/part03

Text File | 1993-07-25 | 105.9 KB | 4,157 lines

Newsgroups: comp.sources.unix
From: [e-mail] (Michael Schroeder)
Subject: v26i302: screen-3.5 - screen manager with VT100/ANSI terminal emulation, V3.5, Part03/10
Sender: [e-mail]
Approved: [e-mail]

Submitted-By: [e-mail] (Michael Schroeder)
Posting-Number: Volume 26, Issue 302
Archive-Name: screen-3.5/part03

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#        "End of archive 3 (of 10)."
# Contents:  COPYING attacher.c fileio.c help.c termcap.c utmp.c
# Wrapped by [e-mail] on Sun Jul 25 12:57:16 1993
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'COPYING' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'COPYING'\"
else
echo shar: Extracting \"'COPYING'\" \(17982 characters\)
sed "s/^X//" >'COPYING' <<'END_OF_FILE'
X            GNU GENERAL PUBLIC LICENSE
X               Version 2, June 1991
X
X Copyright (C) 1989, 1991 Free Software Foundation, Inc.
X                          675 Mass Ave, Cambridge, MA 02139, USA
X Everyone is permitted to copy and distribute verbatim copies
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X  The licenses for most software are designed to take away your
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XThis General Public License does not permit incorporating your program into
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END_OF_FILE
if test 17982 -ne `wc -c <'COPYING'`; then
    echo shar: \"'COPYING'\" unpacked with wrong size!
fi
# end of 'COPYING'
fi
if test -f 'attacher.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'attacher.c'\"
else
echo shar: Extracting \"'attacher.c'\" \(18578 characters\)
sed "s/^X//" >'attacher.c' <<'END_OF_FILE'
X/* Copyright (c) 1993
X *      Juergen Weigert ([e-mail])
X *      Michael Schroeder ([e-mail])
X * Copyright (c) 1987 Oliver Laumann
X *
X * This program is free software; you can redistribute it and/or modify
X * it under the terms of the GNU General Public License as published by
X * the Free Software Foundation; either version 2, or (at your option)
X * any later version.
X *
X * This program is distributed in the hope that it will be useful,
X * but WITHOUT ANY WARRANTY; without even the implied warranty of
X * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X * GNU General Public License for more details.
X *
X * You should have received a copy of the GNU General Public License
X * along with this program (see the file COPYING); if not, write to the
X * Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X *
X ****************************************************************
X */
X
X#include "rcs.h"
XRCS_ID("$Id: attacher.c,v 1.3 1993/07/21 15:42:48 mlschroe Exp $ FAU")
X
X#include <sys/types.h>
X#include <sys/stat.h>
X#include <fcntl.h>
X#include <signal.h>
X#include <pwd.h>
X#include "config.h"
X#include "screen.h"
X#include "extern.h"
X
X#ifdef SHADOWPW
X# include <shadow.h>
X#endif /* SHADOWPW */
X
Xstatic sig_t AttacherSigInt __P(SIGPROTOARG);
X#ifdef PASSWORD
Xstatic void  trysend __P((int, struct msg *, char *));
X#endif
X#if defined(SIGWINCH) && defined(TIOCGWINSZ)
Xstatic sig_t AttacherWinch __P(SIGPROTOARG);
X#endif
X#ifdef LOCK
Xstatic sig_t DoLock __P(SIGPROTOARG);
Xstatic void  LockTerminal __P((void));
Xstatic sig_t LockHup __P(SIGPROTOARG);
Xstatic void  screen_builtin_lck __P((void));
X#endif
X#ifdef DEBUG
Xstatic sig_t AttacherChld __P(SIGPROTOARG);
X#endif
X
Xextern int real_uid, real_gid, eff_uid, eff_gid;
Xextern char *SockName, *SockNamePtr, SockPath[];
Xextern struct passwd *ppp;
Xextern char *attach_tty, *attach_term, *LoginName;
Xextern int xflag, dflag, rflag, quietflag, adaptflag;
Xextern struct mode attach_Mode;
Xextern int MasterPid;
Xextern int nethackflag;
X
X#ifdef MULTIUSER
Xextern char *multi;
Xextern int multiattach, multi_uid, own_uid;
Xextern int tty_mode, tty_oldmode;
X# ifdef NOREUID
Xstatic int multipipe[2];
X# endif
X#endif
X
X
X
X/*
X *  Send message to a screen backend.
X *  returns 1 if we could attach one, or 0 if none.
X */
X
Xint
XAttach(how)
Xint how;
X{
X  int lasts;
X  struct msg m;
X  struct stat st;
X  char *s;
X
X  debug2("Attach: how=%d, tty=%s\n", how, attach_tty);
X#ifdef MULTIUSER
X# ifdef NOREUID
X  while ((how == MSG_ATTACH || how == MSG_CONT) && multiattach)
X    {
X      int ret;
X
X      if (pipe(multipipe))
X    Panic(errno, "pipe");
X      eff_uid = -1;    /* make UserContext fork */
X      real_uid = multi_uid;
X      if ((ret = UserContext()) <= 0)
X    {
X      char dummy;
X          eff_uid = 0;
X      real_uid = own_uid;
X      if (ret < 0)
X        Panic(errno, "UserContext");
X      close(multipipe[1]);
X      read(multipipe[0], &dummy, 1);
X      if (tty_oldmode >= 0)
X        {
X          chmod(attach_tty, tty_oldmode);
X          tty_oldmode = -1;
X        }
X      ret = UserStatus();
X#ifdef LOCK
X      if (ret == SIG_LOCK)
X        LockTerminal();
X      else
X#endif
X#ifdef SIGTSTP
X      if (ret == SIG_STOP)
X        kill(getpid(), SIGTSTP);
X      else
X#endif
X      if (ret == SIG_POWER_BYE)
X        {
X          int ppid;
X          setuid(real_uid);
X          setgid(real_gid);
X          if ((ppid = getppid()) > 1)
X        Kill(ppid, SIGHUP);
X          exit(0);
X        }
X      else
X            exit(ret);
X      dflag = 0;
X#ifdef MULTI
X      xflag = 1;
X#endif
X      how = MSG_ATTACH;
X      continue;
X    }
X      close(multipipe[0]);
X      eff_uid  = real_uid;
X      break;
X    }
X# else /* NOREUID */
X  if ((how == MSG_ATTACH || how == MSG_CONT) && multiattach)
X    {
X      real_uid = multi_uid;
X      eff_uid  = own_uid;
X      setreuid(real_uid, eff_uid);
X      if (chmod(attach_tty, 0666))
X    Panic(errno, "chmod %s", attach_tty);
X      tty_oldmode = tty_mode;
X    }
X# endif /* NOREUID */
X#endif /* MULTIUSER */
X
X  bzero((char *) &m, sizeof(m));
X  m.type = how;
X  strcpy(m.m_tty, attach_tty);
X
X  if (how == MSG_WINCH)
X    {
X      if ((lasts = MakeClientSocket(0, SockName)) >= 0)
X    {
X          write(lasts, (char *)&m, sizeof(m));
X          close(lasts);
X    }
X      return 0;
X    }
X
X  if (how == MSG_CONT)
X    {
X      if ((lasts = MakeClientSocket(0, SockName)) < 0)
X        {
X          Panic(0, "Sorry, cannot contact session \"%s\" again\r\n",
X                 SockName ? SockName : "<NULL>");
X        }
X    }
X  else
X    {
X      switch (FindSocket(how, &lasts))
X    {
X    case 0:
X      if (rflag == 2)
X        return 0;
X      if (quietflag)
X        eexit(10);
X      Panic(0, SockName && *SockName ? "There is no screen to be %sed matching %s." : "There is no screen to be %sed.",
X        xflag ? "attach" :
X        dflag ? "detach" :
X                        "resum", SockName);
X      /* NOTREACHED */
X    case 1:
X      break;
X    default:
X      Panic(0, "Type \"screen [-d] -r [pid.]tty.host\" to resume one of them.");
X      /* NOTREACHED */
X    }
X    }
X  /*
X   * Go in UserContext. Advantage is, you can kill your attacher
X   * when things go wrong. Any disadvantages? jw.
X   * Do this before the attach to prevent races!
X   */
X#ifdef MULTIUSER
X  if (!multiattach)
X#endif
X    setuid(real_uid);
X#if defined(MULTIUSER) && !defined(NOREUID)
X  else
X    setreuid(eff_uid, real_uid);
X#endif
X  setgid(real_gid);
X
X  debug2("Attach: uid %d euid %d\n", getuid(), geteuid());
X  SockName = SockNamePtr;
X  MasterPid = 0;
X  while (*SockName)
X    {
X      if (*SockName > '9' || *SockName < '0')
X    break;
X      MasterPid = 10 * MasterPid + *SockName - '0';
X      SockName++;
X    }
X  SockName = SockNamePtr;
X  debug1("Attach decided, it is '%s'\n", SockPath);
X  debug1("Attach found MasterPid == %d\n", MasterPid);
X  if (stat(SockPath, &st) == -1)
X    Panic(errno, "stat %s", SockPath);
X  if ((st.st_mode & 0600) != 0600)
X    Panic(0, "Socket is in wrong mode (%03o)", st.st_mode);
X  if ((dflag || !xflag) && (st.st_mode & 0700) != (dflag ? 0700 : 0600))
X    Panic(0, "That screen is %sdetached.", dflag ? "already " : "not ");
X#ifdef REMOTE_DETACH
X  if (dflag &&
X      (how == MSG_ATTACH || how == MSG_DETACH || how == MSG_POW_DETACH))
X    {
X      m.m.detach.dpid = getpid();
X      strncpy(m.m.detach.duser, LoginName, sizeof(m.m.detach.duser) - 1);
X      m.m.detach.duser[sizeof(m.m.detach.duser) - 1] = 0;
X# ifdef POW_DETACH
X      if (dflag == 2)
X    m.type = MSG_POW_DETACH;
X      else
X# endif
X    m.type = MSG_DETACH;
X      if (write(lasts, (char *) &m, sizeof(m)) != sizeof(m))
X    Panic(errno, "write");
X      close(lasts);
X      if (how != MSG_ATTACH)
X    return 0;    /* we detached it. jw. */
X      sleep(1);    /* we dont want to overrun our poor backend. jw. */
X      if ((lasts = MakeClientSocket(0, SockName)) == -1)
X    Panic(0, "Cannot contact screen again. Shit.");
X      m.type = how;
X    }
X#endif
X  strcpy(m.m.attach.envterm, attach_term);
X  debug1("attach: sending %d bytes... ", sizeof m);
X
X  strncpy(m.m.attach.auser, LoginName, sizeof(m.m.attach.auser) - 1);
X  m.m.attach.auser[sizeof(m.m.attach.auser) - 1] = 0;
X  m.m.attach.apid = getpid();
X  m.m.attach.adaptflag = adaptflag;
X  m.m.attach.lines = m.m.attach.columns = 0;
X  if ((s = getenv("LINES")))
X    m.m.attach.lines = atoi(s);
X  if ((s = getenv("COLUMNS")))
X    m.m.attach.columns = atoi(s);
X
X#ifdef PASSWORD
X  if (how == MSG_ATTACH || how == MSG_CONT)
X    trysend(lasts, &m, m.m.attach.password);
X  else
X#endif
X    {
X      if (write(lasts, (char *) &m, sizeof(m)) != sizeof(m))
X    Panic(errno, "write");
X      close(lasts);
X    }
X  debug1("Attach(%d): sent\n", m.type);
X#ifdef MULTIUSER
X  if (multi && (how == MSG_ATTACH || how == MSG_CONT))
X    {
X# ifndef PASSWORD
X      pause();
X# endif
X# ifdef NOREUID
X      close(multipipe[1]);
X# else
X      setreuid(real_uid, eff_uid);
X      if (tty_oldmode >= 0)
X        if (chmod(attach_tty, tty_oldmode))
X          Panic(errno, "chmod %s", attach_tty);
X      tty_oldmode = -1;
X      setreuid(eff_uid, real_uid);
X# endif
X    }
X#endif
X  rflag = 0;
X  return 1;
X}
X
X
X#ifdef PASSWORD
X
Xstatic trysendstatok, trysendstatfail;
X
Xstatic sig_t
Xtrysendok(SIGDEFARG)
X{
X  trysendstatok = 1;
X}
X
Xstatic sig_t
Xtrysendfail(SIGDEFARG)
X{
X# ifdef SYSVSIGS
X  signal(SIG_PW_FAIL, trysendfail);
X# endif /* SYSVSIGS */
X  trysendstatfail = 1;
X}
X
Xstatic char screenpw[9];
X
Xstatic void
Xtrysend(fd, m, pwto)
Xint fd;
Xstruct msg *m;
Xchar *pwto;
X{
X  char *npw = NULL;
X  sig_t (*sighup)__P(SIGPROTOARG);
X  sig_t (*sigusr1)__P(SIGPROTOARG);
X  int tries;
X
X  sigusr1 = signal(SIG_PW_OK, trysendok);
X  sighup = signal(SIG_PW_FAIL, trysendfail);
X  for (tries = 0; ; )
X    {
X      strcpy(pwto, screenpw);
X      trysendstatok = trysendstatfail = 0;
X      if (write(fd, (char *) m, sizeof(*m)) != sizeof(*m))
X    Panic(errno, "write");
X      close(fd);
X      while (trysendstatok == 0 && trysendstatfail == 0)
X    pause();
X      if (trysendstatok)
X    {
X      signal(SIG_PW_OK, sigusr1);
X      signal(SIG_PW_FAIL, sighup);
X      if (trysendstatfail)
X        kill(getpid(), SIG_PW_FAIL);
X      return;
X    }
X      if (++tries > 1 || (npw = getpass("Screen Password:")) == 0 || *npw == 0)
X    {
X#ifdef NETHACK
X      if (nethackflag)
X        Panic(0, "The guard slams the door in your face.");
X      else
X#endif
X      Panic(0, "Password incorrect.");
X    }
X      strncpy(screenpw, npw, 8);
X      if ((fd = MakeClientSocket(0, SockName)) == -1)
X    Panic(0, "Cannot contact screen again. Shit.");
X    }
X}
X#endif /* PASSWORD */
X
X
X#ifdef DEBUG
Xstatic int AttacherPanic;
X
Xstatic sig_t
XAttacherChld(SIGDEFARG)
X{
X  AttacherPanic=1;
X#ifndef SIGVOID
X  return((sig_t) 0);
X#endif
X}
X#endif
X
X/*
X * the frontend's Interrupt handler
X * we forward SIGINT to the poor backend
X */
Xstatic sig_t
XAttacherSigInt(SIGDEFARG)
X{
X  signal(SIGINT, AttacherSigInt);
X  Kill(MasterPid, SIGINT);
X# ifndef SIGVOID
X  return (sig_t) 0;
X# endif
X}
X
X/*
X * Unfortunatelly this is also the SIGHUP handler, so we have to
X * check, if the backend is already detached.
X */
X
Xsig_t
XAttacherFinit(SIGDEFARG)
X{
X  struct stat statb;
X  struct msg m;
X  int s;
X
X  debug("AttacherFinit();\n");
X  signal(SIGHUP, SIG_IGN);
X  /* Check if signal comes from backend */
X  if (SockName)
X    {
X      strcpy(SockNamePtr, SockName);
X      if (stat(SockPath, &statb) == 0 && (statb.st_mode & 0777) != 0600)
X    {
X      debug("Detaching backend!\n");
X      bzero((char *) &m, sizeof(m));
X      strcpy(m.m_tty, attach_tty);
X          debug1("attach_tty is %s\n", attach_tty);
X      m.m.detach.dpid = getpid();
X      m.type = MSG_HANGUP;
X      if ((s = MakeClientSocket(0, SockName)) >= 0)
X        {
X          write(s, (char *)&m, sizeof(m));
X          close(s);
X        }
X    }
X    }
X#ifdef MULTIUSER
X  if (tty_oldmode >= 0)
X    {
X      setuid(own_uid);
X      chmod(attach_tty, tty_oldmode);
X    }
X#endif
X  exit(0);
X#ifndef SIGVOID
X  return((sig_t) 0);
X#endif
X}
X
X#ifdef POW_DETACH
Xstatic sig_t
XAttacherFinitBye(SIGDEFARG)
X{
X  int ppid;
X  debug("AttacherFintBye()\n");
X#if defined(MULTIUSER) && defined(NOREUID)
X  if (multiattach)
X    exit(SIG_POWER_BYE);
X#endif
X#ifdef MULTIUSER
X  setuid(own_uid);
X#else
X  setuid(real_uid);
X#endif
X  setgid(real_gid);
X  /* we don't want to disturb init (even if we were root), eh? jw */
X  if ((ppid = getppid()) > 1)
X    Kill(ppid, SIGHUP);        /* carefully say good bye. jw. */
X  exit(0);
X#ifndef SIGVOID
X  return((sig_t) 0);
X#endif
X}
X#endif
X
Xstatic int SuspendPlease;
X
Xstatic sig_t
XSigStop(SIGDEFARG)
X{
X  debug("SigStop()\n");
X  SuspendPlease = 1;
X#ifndef SIGVOID
X  return((sig_t) 0);
X#endif
X}
X
X#ifdef LOCK
Xstatic int LockPlease;
X
Xstatic sig_t
XDoLock(SIGDEFARG)
X{
X# ifdef SYSVSIGS
X  signal(SIG_LOCK, DoLock);
X# endif
X  debug("DoLock()\n");
X  LockPlease = 1;
X# ifndef SIGVOID
X  return((sig_t) 0);
X# endif
X}
X#endif
X
X#if defined(SIGWINCH) && defined(TIOCGWINSZ)
Xstatic int SigWinchPlease;
X
Xstatic sig_t
XAttacherWinch(SIGDEFARG)
X{
X  debug("AttacherWinch()\n");
X  SigWinchPlease = 1;
X# ifndef SIGVOID
X  return((sig_t) 0);
X# endif
X}
X#endif
X
X
X/*
X *  Attacher loop - no return
X */
X
Xvoid
XAttacher()
X{
X  signal(SIGHUP, AttacherFinit);
X  signal(SIG_BYE, AttacherFinit);
X#ifdef POW_DETACH
X  signal(SIG_POWER_BYE, AttacherFinitBye);
X#endif
X#ifdef LOCK
X  signal(SIG_LOCK, DoLock);
X#endif
X  signal(SIGINT, AttacherSigInt);
X#ifdef BSDJOBS
X  signal(SIG_STOP, SigStop);
X#endif
X#if defined(SIGWINCH) && defined(TIOCGWINSZ)
X  signal(SIGWINCH, AttacherWinch);
X#endif
X#ifdef DEBUG
X  signal(SIGCHLD, AttacherChld);
X#endif
X  debug("attacher: going for a nap.\n");
X  dflag = 0;
X#ifdef MULTI
X  xflag = 1;
X#endif
X  for (;;)
X    {
X      pause();
X      debug("attacher: huh! a signal!\n");
X#ifdef DEBUG
X      if (AttacherPanic)
X        {
X      fcntl(0, F_SETFL, 0);
X      SetTTY(0, &attach_Mode);
X      printf("\nSuddenly the Dungeon collapses!! - You die...\n");
X      eexit(1);
X        }
X#endif
X#ifdef BSDJOBS
X      if (SuspendPlease)
X    {
X      SuspendPlease = 0;
X#if defined(MULTIUSER) && defined(NOREUID)
X      if (multiattach)
X        exit(SIG_STOP);
X#endif
X      signal(SIGTSTP, SIG_DFL);
X      debug("attacher: killing myself SIGTSTP\n");
X      kill(getpid(), SIGTSTP);
X      debug("attacher: continuing from stop\n");
X      signal(SIG_STOP, SigStop);
X      (void) Attach(MSG_CONT);
X    }
X#endif
X#ifdef LOCK
X      if (LockPlease)
X    {
X      LockPlease = 0;
X#if defined(MULTIUSER) && defined(NOREUID)
X      if (multiattach)
X        exit(SIG_LOCK);
X#endif
X      LockTerminal();
X# ifdef SYSVSIGS
X      signal(SIG_LOCK, DoLock);
X# endif
X      (void) Attach(MSG_CONT);
X    }
X#endif    /* LOCK */
X#if defined(SIGWINCH) && defined(TIOCGWINSZ)
X      if (SigWinchPlease)
X    {
X      SigWinchPlease = 0;
X# ifdef SYSVSIGS
X      signal(SIGWINCH, AttacherWinch);
X# endif
X      (void) Attach(MSG_WINCH);
X    }
X#endif    /* SIGWINCH */
X    }
X}
X
X#ifdef LOCK
X
X/* ADDED by Rainer Pruy 10/15/87 */
X/* POLISHED by mls. 03/10/91 */
X
Xstatic char LockEnd[] = "Welcome back to screen !!\n";
X
Xstatic sig_t
XLockHup(SIGDEFARG)
X{
X  int ppid = getppid();
X  setuid(real_uid);
X  setgid(real_gid);
X  if (ppid > 1)
X    Kill(ppid, SIGHUP);
X  exit(0);
X}
X
Xstatic void
XLockTerminal()
X{
X  char *prg;
X  int sig, pid;
X  sig_t (*sigs[NSIG])__P(SIGPROTOARG);
X
X  for (sig = 1; sig < NSIG; sig++)
X    {
X      sigs[sig] = signal(sig, SIG_IGN);
X    }
X  signal(SIGHUP, LockHup);
X  printf("\n");
X
X  prg = getenv("LOCKPRG");
X  if (prg && strcmp(prg, "builtin") && !access(prg, X_OK))
X    {
X      signal(SIGCHLD, SIG_DFL);
X      debug1("lockterminal: '%s' seems executable, execl it!\n", prg);
X      if ((pid = fork()) == 0)
X        {
X          /* Child */
X          setuid(real_uid);    /* this should be done already */
X          setgid(real_gid);
X          closeallfiles(0);    /* important: /etc/shadow may be open */
X          execl(prg, "SCREEN-LOCK", NULL);
X          exit(errno);
X        }
X      if (pid == -1)
X        {
X#ifdef NETHACK
X          if (nethackflag)
X            Msg(errno, "Cannot fork terminal - lock failed");
X          else
X#endif
X          Msg(errno, "Cannot lock terminal - fork failed");
X        }
X      else
X        {
X#ifdef BSDWAIT
X          union wait wstat;
X#else
X          int wstat;
X#endif
X          int wret;
X
X#ifdef hpux
X          signal(SIGCHLD, SIG_DFL);
X#endif
X          errno = 0;
X          while (((wret = wait(&wstat)) != pid) ||
X             ((wret == -1) && (errno == EINTR))
X             )
X        errno = 0;
X
X          if (errno)
X        {
X          Msg(errno, "Lock");
X          sleep(2);
X        }
X      else if (WTERMSIG(wstat) != 0)
X        {
X          fprintf(stderr, "Lock: %s: Killed by signal: %d%s\n", prg,
X              WTERMSIG(wstat), WIFCORESIG(wstat) ? " (Core dumped)" : "");
X          sleep(2);
X        }
X      else if (WEXITSTATUS(wstat))
X        {
X          debug2("Lock: %s: return code %d\n", prg, WEXITSTATUS(wstat));
X        }
X          else
X        printf(LockEnd);
X        }
X    }
X  else
X    {
X      if (prg)
X    {
X          debug1("lockterminal: '%s' seems NOT executable, we use our builtin\n", prg);
X    }
X      else
X    {
X      debug("lockterminal: using buitin.\n");
X    }
X      screen_builtin_lck();
X    }
X  /* reset signals */
X  for (sig = 1; sig < NSIG; sig++)
X    {
X      if (sigs[sig] != (sig_t(*)__P(SIGPROTOARG)) -1)
X    signal(sig, sigs[sig]);
X    }
X}                /* LockTerminal */
X
X/* -- original copyright by Luigi Cannelloni 1985 ([e-mail]) -- */
Xstatic void
Xscreen_builtin_lck()
X{
X  char fullname[100], *cp1, message[BUFSIZ];
X  char c, *pass, mypass[9];
X#ifdef SHADOWPW
X  struct spwd *sss = NULL;
X#endif
X  int t;
X
X#ifdef undef
X  /* get password entry */
X  if ((ppp = getpwuid(real_uid)) == NULL)
X    {
X      fprintf(stderr, "screen_builtin_lck: No passwd entry.\007\n");
X      sleep(2);
X      return;
X    }
X  if (!isatty(0))
X    {
X      fprintf(stderr, "screen_builtin_lck: Not a tty.\007\n");
X      sleep(2);
X      return;
X    }
X#endif
X  pass = ppp->pw_passwd;
X#ifdef SHADOWPW
Xrealpw:
X#endif /* SHADOWPW */
X  for (t = 0; t < 13; t++)
X    {
X      c = pass[t];
X      if (!(c == '.' || c == '/' ||
X            (c >= '0' && c <= '9') ||
X            (c >= 'a' && c <= 'z') ||
X            (c >= 'A' && c <= 'Z')))
X        break;
X    }
X  if (t < 13)
X    {
X      debug("builtin_lock: ppp->pw_passwd bad, has it a shadow?\n");
X#ifdef SHADOWPW
X      setspent(); /* rewind shadow file */
X      if ((sss == NULL) && (sss = getspnam(ppp->pw_name)))
X        {
X          pass = sss->sp_pwdp;
X          goto realpw;
X        }
X#endif /* SHADOWPW */
X      if ((pass = getpass("Key:   ")))
X        {
X          strncpy(mypass, pass, 8);
X          mypass[8] = 0;
X          if (*mypass == 0)
X            return;
X          if ((pass = getpass("Again: ")))
X            {
X              if (strcmp(mypass, pass))
X                {
X                  fprintf(stderr, "Passwords don't match.\007\n");
X                  sleep(2);
X                  return;
X                }
X            }
X        }
X      if (pass == 0)
X        {
X          fprintf(stderr, "Getpass error.\007\n");
X          sleep(2);
X          return;
X        }
X      pass = 0;
X    }
X
X  debug("screen_builtin_lck looking in gcos field\n");
X  strcpy(fullname, ppp->pw_gecos);
X  if ((cp1 = index(fullname, ',')) != NULL)
X    *cp1 = '\0';
X  if ((cp1 = index(fullname, '&')) != NULL)
X    {
X      sprintf(cp1, "%s", ppp->pw_name);
X      if (*cp1 >= 'a' && *cp1 <= 'z')
X    *cp1 -= 'a' - 'A';
X    }
X
X  sprintf(message, "Screen used by %s <%s>.\nPassword:\007",
X          fullname, ppp->pw_name);
X
X  /* loop here to wait for correct password */
X  for (;;)
X    {
X      debug("screen_builtin_lck awaiting password\n");
X      errno = 0;
X      if ((cp1 = getpass(message)) == NULL)
X        {
X          AttacherFinit(SIGARG);
X          /* NOTREACHED */
X        }
X      debug3("getpass(%d): %x == %s\n", errno, (unsigned int)cp1, cp1);
X      if (pass)
X        {
X          if (!strcmp(crypt(cp1, pass), pass))
X            break;
X        }
X      else
X        {
X          if (!strcmp(cp1, mypass))
X            break;
X        }
X      debug("screen_builtin_lck: NO!!!!!\n");
X    }
X  debug("password ok.\n");
X}
X
X#endif    /* LOCK */
END_OF_FILE
if test 18578 -ne `wc -c <'attacher.c'`; then
    echo shar: \"'attacher.c'\" unpacked with wrong size!
fi
# end of 'attacher.c'
fi
if test -f 'fileio.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'fileio.c'\"
else
echo shar: Extracting \"'fileio.c'\" \(15658 characters\)
sed "s/^X//" >'fileio.c' <<'END_OF_FILE'
X/* Copyright (c) 1993
X *      Juergen Weigert ([e-mail])
X *      Michael Schroeder ([e-mail])
X * Copyright (c) 1987 Oliver Laumann
X *
X * This program is free software; you can redistribute it and/or modify
X * it under the terms of the GNU General Public License as published by
X * the Free Software Foundation; either version 2, or (at your option)
X * any later version.
X *
X * This program is distributed in the hope that it will be useful,
X * but WITHOUT ANY WARRANTY; without even the implied warranty of
X * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X * GNU General Public License for more details.
X *
X * You should have received a copy of the GNU General Public License
X * along with this program (see the file COPYING); if not, write to the
X * Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X *
X ****************************************************************
X */
X
X#include "rcs.h"
XRCS_ID("$Id: fileio.c,v 1.2 1993/06/23 17:46:30 jnweiger Exp $ FAU")
X
X
X#include <sys/types.h>
X#ifndef sgi
X# include <sys/file.h>
X#endif /* sgi */
X#include <sys/stat.h>
X#include <fcntl.h>
X
X#include <signal.h>
X
X#include "config.h"
X#include "screen.h"
X#include "extern.h"
X
X#ifdef NETHACK
Xextern nethackflag;
X#endif
X
Xextern struct display *display;
Xextern struct win *fore;
Xextern int real_uid, eff_uid;
Xextern int real_gid, eff_gid;
Xextern char *extra_incap, *extra_outcap;
Xextern char *home, *RcFileName;
Xextern char SockPath[], *SockNamePtr;
X#ifdef COPY_PASTE
Xextern char *BufferFile;
X#endif
Xextern int hardcopy_append;
Xextern char *hardcopydir;
X
Xstatic char *CatExtra __P((char *, char *));
X
X
Xstatic FILE *fp = NULL;
Xchar *rc_name;
X
Xstatic char *
XCatExtra(str1, str2)
Xregister char *str1, *str2;
X{
X  register char *cp;
X  register int len1, len2, add_colon;
X
X  len1 = strlen(str1);
X  if (len1 == 0)
X    return(str2);
X  add_colon = (str1[len1 - 1] != ':');
X  if (str2)
X    {
X      len2 = strlen(str2);
X      if ((cp = realloc(str2, (unsigned) len1 + len2 + add_colon + 1)) == NULL)
X    Panic(0, strnomem);
X      bcopy(cp, cp + len1 + add_colon, len2 + 1);
X    }
X  else
X    {
X      if (len1 == 0)
X    return 0;
X      if ((cp = malloc((unsigned) len1 + add_colon + 1)) == NULL)
X    Panic(0, strnomem);
X      cp[len1 + add_colon] = '\0';
X    }
X  bcopy(str1, cp, len1);
X  if (add_colon)
X    cp[len1] = ':';
X
X  return cp;
X}
X
Xstatic char *
Xfindrcfile(rcfile)
Xchar *rcfile;
X{
X  static char buf[256];
X  char *rc, *p;
X
X  if (rcfile)
X    {
X      rc = SaveStr(rcfile);
X      debug1("findrcfile: you specified '%s'\n", rcfile);
X    }
X  else
X    {
X      debug("findrcfile: you specified nothing...\n");
X      if ((p = getenv("ISCREENRC")) != NULL && *p != '\0')
X    {
X      debug1("  ... but $ISCREENRC has: '%s'\n", p);
X      rc = SaveStr(p);
X    }
X      else if ((p = getenv("SCREENRC")) != NULL && *p != '\0')
X    {
X      debug1("  ... but $SCREENRC has: '%s'\n", p);
X      rc = SaveStr(p);
X    }
X      else
X    {
X      debug("  ...nothing in $SCREENRC, defaulting $HOME/.screenrc\n");
X      if (strlen(home) > 244)
X        Panic(0, "Rc: home too large");
X      sprintf(buf, "%s/.iscreenrc", home);
X          if (access(buf, R_OK))
X        sprintf(buf, "%s/.screenrc", home);
X      rc = SaveStr(buf);
X    }
X    }
X  return rc;
X}
X
X/*
X * this will be called twice:
X * 1) rcfilename = "/etc/screenrc"
X * 2) rcfilename = RcFileName
X */
Xvoid
XStartRc(rcfilename)
Xchar *rcfilename;
X{
X  register int argc, len;
X  register char *p, *cp;
X  char buf[256];
X  char *args[MAXARGS];
X
X  rc_name = findrcfile(rcfilename);
X
X  if ((fp = secfopen(rc_name, "r")) == NULL)
X    {
X      if (RcFileName && strcmp(RcFileName, rc_name) == 0)
X    {
X          /*
X           * User explicitly gave us that name,
X           * this is the only case, where we get angry, if we can't read
X           * the file.
X           */
X      debug3("StartRc: '%s','%s', '%s'\n", RcFileName, rc_name, rcfilename);
X          Panic(0, "Unable to open \"%s\".", rc_name);
X      /* NOTREACHED */
X    }
X      debug1("StartRc: '%s' no good. ignored\n", rc_name);
X      Free(rc_name);
X      rc_name = "";
X      return;
X    }
X  while (fgets(buf, sizeof buf, fp) != NULL)
X    {
X      if ((p = rindex(buf, '\n')) != NULL)
X    *p = '\0';
X      if ((argc = Parse(buf, args)) == 0)
X    continue;
X      if (strcmp(args[0], "echo") == 0)
X    {
X      if (!display)
X        continue;
X      if (argc < 2 || (argc == 3 && strcmp(args[1], "-n")) || argc > 3)
X        {
X          Msg(0, "%s: 'echo [-n] \"string\"' expected.", rc_name);
X          continue;
X        }
X      AddStr(args[argc - 1]);
X      if (argc != 3)
X        {
X          AddStr("\r\n");
X          Flush();
X        }
X    }
X      else if (strcmp(args[0], "sleep") == 0)
X    {
X      if (!display)
X        continue;
X      debug("sleeeeeeep\n");
X      if (argc != 2)
X        {
X          Msg(0, "%s: sleep: one numeric argument expected.", rc_name);
X          continue;
X        }
X      DisplaySleep(atoi(args[1]));
X    }
X#ifdef TERMINFO
X      else if (strcmp(args[0], "terminfo") == 0)
X#else
X      else if (strcmp(args[0], "termcap") == 0)
X#endif
X    {
X      if (!display)
X        continue;
X      if (argc < 3 || argc > 4)
X        {
X          Msg(0, "%s: %s: incorrect number of arguments.", rc_name, args[0]);
X          continue;
X        }
X      for (p = args[1]; p && *p; p = cp)
X        {
X          if ((cp = index(p, '|')) != 0)
X        *cp++ = '\0';
X          len = strlen(p);
X          if (p[len - 1] == '*')
X        {
X          if (!(len - 1) || !strncmp(p, d_termname, len - 1))
X            break;
X        }
X          else if (!strcmp(p, d_termname))
X        break;
X        }
X      if (!(p && *p))
X        continue;
X      extra_incap = CatExtra(args[2], extra_incap);
X      if (argc == 4)
X        extra_outcap = CatExtra(args[3], extra_outcap);
X    }
X    }
X  fclose(fp);
X  Free(rc_name);
X  rc_name = "";
X}
X
Xvoid
XFinishRc(rcfilename)
Xchar *rcfilename;
X{
X  char buf[256];
X
X  rc_name = findrcfile(rcfilename);
X
X  if ((fp = secfopen(rc_name, "r")) == NULL)
X    {
X      if (RcFileName && strcmp(RcFileName, rc_name) == 0)
X    {
X          /*
X        * User explicitly gave us that name,
X       * this is the only case, where we get angry, if we can't read
X       * the file.
X       */
X        debug3("FinishRc:'%s','%s','%s'\n", RcFileName, rc_name, rcfilename);
X          Panic(0, "Unable to open \"%s\".", rc_name);
X      /* NOTREACHED */
X    }
X      debug1("FinishRc: '%s' no good. ignored\n", rc_name);
X      Free(rc_name);
X      rc_name = "";
X      return;
X    }
X
X  debug("finishrc is going...\n");
X  while (fgets(buf, sizeof buf, fp) != NULL)
X    {
X      RcLine(buf);
X    }
X  (void) fclose(fp);
X  Free(rc_name);
X  rc_name = "";
X}
X
X/*
X *    "$HOST blafoo"       -> "localhost blafoo"
X *    "${HOST}blafoo"          -> "localhostblafoo"
X *    "\$HOST blafoo"     -> "$HOST blafoo"
X *    "\\$HOST blafoo"    -> "\localhost blafoo"
X *    "'$HOST ${HOST}'"    -> "'$HOST ${HOST}'"
X *    "'\$HOST'"           -> "'\$HOST'"
X *    "\'$HOST' $HOST"       -> "'localhost' $HOST"
X *
X *    "$:termcapname:"    -> "termcapvalue"
X *    "$:terminfoname:"    -> "termcapvalue"
X *
X *    "\101"            -> "A"
X */
Xchar *
Xexpand_vars(ss)
Xchar *ss;
X{
X  static char ebuf[2048];
X  register int esize = 2047, vtype, quofl = 0;
X  register char *e = ebuf;
X  register char *s = ss;
X  register char *v;
X  char xbuf[11];
X
X  while (*s && *s != '\0' && *s != '\n' && esize > 0)
X    {
X      if (*s == '\'')
X    quofl ^= 1;
X      if (*s == '$' && !quofl)
X    {
X      char *p, c;
X
X      p = ++s;
X      switch (*s)
X        {
X        case '{':
X          p = ++s;
X          while (*p != '}')
X            if (*p++ == '\0')
X              return ss;
X          vtype = 0;        /* env var */
X          break;
X        case ':':
X          p = ++s;
X          while (*p != ':')
X        if (*p++ == '\0')
X          return ss;
X          vtype = 1;        /* termcap string */
X          break;
X        default:
X          while (*p != ' ' && *p != '\0' && *p != '\n')
X        p++;
X          vtype = 0;        /* env var */
X        }
X      c = *p;
X      debug1("exp: c='%c'\n", c);
X      *p = '\0';
X      if (vtype == 0)
X        {
X          v = xbuf;
X          if (strcmp(s, "TERM") == 0)
X        v = display ? d_termname : "unknown";
X          else if (strcmp(s, "COLUMNS") == 0)
X        sprintf(xbuf, "%d", display ? d_width : -1);
X          else if (strcmp(s, "LINES") == 0)
X        sprintf(xbuf, "%d", display ? d_height : -1);
X          else
X        v = getenv(s);
X        }
X      else
X        v = gettermcapstring(s);
X      if (v)
X        {
X          debug2("exp: $'%s'='%s'\n", s, v);
X          while (*v && esize-- > 0)
X            *e++ = *v++;
X        }
X      else
X        debug1("exp: '%s' not env\n", s);  /* {-: */
X      if ((*p = c) == '}' || c == ':')
X        p++;
X      s = p;
X    }
X      else
X    {
X      /*
X       * \$, \\$, \\, \\\, \012 are reduced here,
X       * d_other sequences starting whith \ are passed through.
X       */
X      if (s[0] == '\\' && !quofl)
X        {
X          if (s[1] >= '0' && s[1] <= '7')
X        {
X          int i;
X
X          s++;
X          i = *s - '0';
X          s++;
X          if (*s >= '0' && *s <= '7')
X            {
X              i = i * 8 + *s - '0';
X              s++;
X              if (*s >= '0' && *s <= '7')
X            {
X              i = i * 8 + *s - '0';
X              s++;
X            }
X            }
X          debug2("expandvars: octal coded character %o (%d)\n", i, i);
X          *e++ = i;
X        }
X          else
X        {
X          if (s[1] == '$' ||
X              (s[1] == '\\' && s[2] == '$') ||
X              s[1] == '\'' ||
X              (s[1] == '\\' && s[2] == '\''))
X            s++;
X        }
X        }
X      *e++ = *s++;
X      esize--;
X    }
X    }
X  if (esize <= 0)
X    Msg(0, "expand_vars: buffer overflow\n");
X  *e = '\0';
X  return ebuf;
X}
X
Xvoid
XRcLine(ubuf)
Xchar *ubuf;
X{
X  char *args[MAXARGS], *buf;
X  struct action act;
X
X  buf = expand_vars(ubuf);
X  if (Parse(buf, args) <= 0)
X    return;
X  if ((act.nr = FindCommnr(*args)) == RC_ILLEGAL)
X    {
X      Msg(0, "%s: unknown command '%s'", rc_name, *args);
X      return;
X    }
X  act.args = args + 1;
X  DoAction(&act, -1);
X}
X
X
Xvoid
XWriteFile(dump)
Xint dump;
X{
X  /* dump==0:    create .termcap,
X   * dump==1:    hardcopy,
X   * #ifdef COPY_PASTE
X   * dump==2:    BUFFERFILE
X   * #endif COPY_PASTE
X   */
X  register int i, j, k;
X  register char *p;
X  register FILE *f;
X  char fn[1024];
X  char *mode = "w";
X
X  switch (dump)
X    {
X    case DUMP_TERMCAP:
X      i = SockNamePtr - SockPath;
X      strncpy(fn, SockPath, i);
X      strcpy(fn + i, ".termcap");
X      break;
X    case DUMP_HARDCOPY:
X      if (hardcopydir)
X    sprintf(fn, "%s/hardcopy.%d", hardcopydir, fore->w_number);
X      else
X        sprintf(fn, "hardcopy.%d", fore->w_number);
X      if (hardcopy_append && !access(fn, W_OK))
X    mode = "a";
X      break;
X#ifdef COPY_PASTE
X    case DUMP_EXCHANGE:
X      sprintf(fn, "%s", BufferFile);
X      umask(0);
X      break;
X#endif
X    }
X
X  debug2("WriteFile(%d) %s\n", dump, fn);
X  if (UserContext() > 0)
X    {
X      debug("Writefile: usercontext\n");
X      if ((f = fopen(fn, mode)) == NULL)
X    {
X      debug2("WriteFile: fopen(%s,\"%s\") failed\n", fn, mode);
X      UserReturn(0);
X    }
X      else
X    {
X      switch (dump)
X        {
X        case DUMP_HARDCOPY:
X          if (*mode == 'a')
X        {
X          putc('>', f);
X          for (j = d_width - 2; j > 0; j--)
X            putc('=', f);
X          fputs("<\n", f);
X        }
X          for (i = 0; i < d_height; i++)
X        {
X          p = fore->w_image[i];
X          for (k = d_width - 1; k >= 0 && p[k] == ' '; k--)
X            ;
X          for (j = 0; j <= k; j++)
X            putc(p[j], f);
X          putc('\n', f);
X        }
X          break;
X        case DUMP_TERMCAP:
X          if ((p = index(MakeTermcap(fore->w_aflag), '=')) != NULL)
X        {
X          fputs(++p, f);
X          putc('\n', f);
X        }
X          break;
X#ifdef COPY_PASTE
X        case DUMP_EXCHANGE:
X          p = d_copybuffer;
X          for (i = 0; i < d_copylen; i++)
X        putc(*p++, f);
X          break;
X#endif
X        }
X      (void) fclose(f);
X      UserReturn(1);
X    }
X    }
X  if (UserStatus() <= 0)
X    Msg(0, "Cannot open \"%s\"", fn);
X  else
X    {
X      switch (dump)
X    {
X    case DUMP_TERMCAP:
X      Msg(0, "Termcap entry written to \"%s\".", fn);
X      break;
X    case DUMP_HARDCOPY:
X      Msg(0, "Screen image %s to \"%s\".",
X          (*mode == 'a') ? "appended" : "written", fn);
X      break;
X#ifdef COPY_PASTE
X    case DUMP_EXCHANGE:
X      Msg(0, "Copybuffer written to \"%s\".", fn);
X#endif
X    }
X    }
X}
X
X#ifdef COPY_PASTE
X
Xvoid
XReadFile()
X{
X  int i, l, size;
X  char fn[1024], c;
X  struct stat stb;
X
X  sprintf(fn, "%s", BufferFile);
X  debug1("ReadFile(%s)\n", fn);
X  if ((i = secopen(fn, O_RDONLY, 0)) < 0)
X    {
X      Msg(errno, "no %s -- no slurp", fn);
X      return;
X    }
X  if (fstat(i, &stb))
X    {
X      Msg(errno, "no good %s -- no slurp", fn);
X      close(i);
X      return;
X    }
X  size = stb.st_size;
X  if (d_copybuffer)
X    free(d_copybuffer);
X  d_copylen = 0;
X  if ((d_copybuffer = malloc(size)) == NULL)
X    {
X      close(i);
X      Msg(0, strnomem);
X      return;
X    }
X  errno = 0;
X  if ((l = read(i, d_copybuffer, size)) != size)
X    {
X      d_copylen = (l > 0) ? l : 0;
X#ifdef NETHACK
X      if (nethackflag)
X        Msg(errno, "You choke on your food: %d bytes", d_copylen);
X      else
X#endif
X      Msg(errno, "Got only %d bytes from %s", d_copylen, fn);
X      close(i);
X      return;
X    }
X  d_copylen = l;
X  if (read(i, &c, 1) > 0)
X    Msg(0, "Slurped only %d characters into buffer - try again", d_copylen);
X  else
X    Msg(0, "Slurped %d characters into buffer", d_copylen);
X  close(i);
X  return;
X}
X
Xvoid
XKillBuffers()
X{
X  char fn[1024];
X  sprintf(fn, "%s", BufferFile);
X  errno = 0;
X#ifndef NOREUID
X  setreuid(eff_uid, real_uid);
X  setregid(eff_gid, real_gid);
X#else
X  if (access(fn, W_OK) == -1)
X    {
X      Msg(errno, "%s not removed", fn);
X      return;
X    }
X#endif
X  unlink(fn);
X  Msg(errno, "%s removed", fn);
X#ifndef NOREUID
X  setreuid(real_uid, eff_uid);
X  setregid(real_gid, eff_gid);
X#endif
X}
X#endif    /* COPY_PASTE */
X
X
X/*
X * (Almost) secure open and fopen...
X */
X
XFILE *
Xsecfopen(name, mode)
Xchar *name;
Xchar *mode;
X{
X  FILE *fi;
X#ifdef NOREUID
X  int flags, fd;
X#endif
X
X  debug2("secfopen(%s, %s)\n", name, mode);
X#ifndef NOREUID
X  setreuid(eff_uid, real_uid);
X  setregid(eff_gid, real_gid);
X  fi = fopen(name, mode);
X  setreuid(real_uid, eff_uid);
X  setregid(real_gid, eff_gid);
X  return fi;
X#else
X  if (eff_uid == real_uid)
X    return(fopen(name, mode));
X  if (mode[0] && mode[1] == '+')
X    flags = O_RDWR;
X  else
X    flags = (mode[0] == 'r') ? O_RDONLY : O_WRONLY;
X  if (mode[0] == 'w')
X    flags |= O_CREAT | O_TRUNC;
X  else if (mode[0] == 'a')
X    flags |= O_CREAT | O_APPEND;
X  else if (mode[0] != 'r')
X    {
X      errno = EINVAL;
X      return(0);
X    }
X  if ((fd = secopen(name, flags, 0666)) < 0)
X    return(0);
X  if ((fi = fdopen(fd, mode)) == 0)
X    {
X      close(fd);
X      return(0);
X    }
X  return(fi);
X#endif
X}
X
X
Xint
Xsecopen(name, flags, mode)
Xchar *name;
Xint flags;
Xint mode;
X{
X  int fd;
X#ifdef NOREUID
X  int q;
X  struct stat stb;
X#endif
X
X  debug3("secopen(%s, 0x%x, 0%03o)\n", name, flags, mode);
X#ifndef NOREUID
X  setreuid(eff_uid, real_uid);
X  setregid(eff_gid, real_gid);
X  fd = open(name, flags, mode);
X  setreuid(real_uid, eff_uid);
X  setregid(real_gid, eff_gid);
X  return fd;
X#else
X  if (eff_uid == real_uid)
X    return(open(name, flags, mode));
X  /* Truncation/creation is done in UserContext */
X  if ((flags & O_TRUNC) || ((flags & O_CREAT) && access(name, F_OK)))
X    {
X      if (UserContext() > 0)
X    {
X          if ((fd = open(name, flags, mode)) >= 0)
X        {
X          close(fd);
X          UserReturn(0);
X            }
X      if (errno == 0)
X        errno = EACCES;
X      UserReturn(errno);
X    }
X      if (q = UserStatus())
X    {
X      if (q > 0)
X        errno = q;
X          return(-1);
X    }
X    }
X  if (access(name, F_OK))
X    return(-1);
X  if ((fd = open(name, flags & ~(O_TRUNC | O_CREAT), 0)) < 0)
X    return(-1);
X  debug("open successful\n");
X  if (fstat(fd, &stb))
X    {
X      close(fd);
X      return(-1);
X    }
X  debug("fstat successful\n");
X  if (stb.st_uid != real_uid)
X    {
X      switch (flags & (O_RDONLY | O_WRONLY | O_RDWR))
X        {
X    case O_RDONLY:
X      q = 0004;
X      break;
X    case O_WRONLY:
X      q = 0002;
X      break;
X    default:
X      q = 0006;
X      break;
X        }
X      if ((stb.st_mode & q) != q)
X    {
X          debug("secopen: permission denied\n");
X      close(fd);
X      errno = EACCES;
X      return(-1);
X    }
X    }
X  debug1("secopen ok - returning %d\n", fd);
X  return(fd);
X#endif
X}
END_OF_FILE
if test 15658 -ne `wc -c <'fileio.c'`; then
    echo shar: \"'fileio.c'\" unpacked with wrong size!
fi
# end of 'fileio.c'
fi
if test -f 'help.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'help.c'\"
else
echo shar: Extracting \"'help.c'\" \(15096 characters\)
sed "s/^X//" >'help.c' <<'END_OF_FILE'
X/* Copyright (c) 1993
X *      Juergen Weigert ([e-mail])
X *      Michael Schroeder ([e-mail])
X * Copyright (c) 1987 Oliver Laumann
X *
X * This program is free software; you can redistribute it and/or modify
X * it under the terms of the GNU General Public License as published by
X * the Free Software Foundation; either version 2, or (at your option)
X * any later version.
X *
X * This program is distributed in the hope that it will be useful,
X * but WITHOUT ANY WARRANTY; without even the implied warranty of
X * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X * GNU General Public License for more details.
X *
X * You should have received a copy of the GNU General Public License
X * along with this program (see the file COPYING); if not, write to the
X * Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X *
X ****************************************************************
X */
X
X#include "rcs.h"
XRCS_ID("$Id: help.c,v 1.1.1.1 1993/06/16 23:51:12 jnweiger Exp $ FAU")
X
X#include <stdio.h>
X#include <sys/types.h>
X
X#include "config.h"
X
X#include "screen.h"
X#include "extern.h"
X
Xchar version[40];      /* initialised by main() */
Xextern char Esc, MetaEsc;
Xextern struct display *display;
Xextern char *noargs[];
X
X
Xvoid
Xexit_with_usage(myname)
Xchar *myname;
X{
X  printf("Use: %s [-opts] [cmd [args]]\n", myname);
X  printf(" or: %s -r [host.tty]\n\nOptions:\n", myname);
X  printf("-a           Force all capabilities into each window's termcap.\n");
X  printf("-A -[r|R]    Adapt all windows to the new display width & height.\n");
X  printf("-c file      Read configuration file instead of '.screenrc'.\n");
X#ifdef REMOTE_DETACH
X  printf("-d (-r)      Detach the elsewhere running screen (and reattach here).\n");
X  printf("-D (-r)      Detach and logout remote (and reattach here).\n");
X#endif
X  printf("-e xy        Change command characters.\n");
X  printf("-f           Flow control on, -fn = off, -fa = auto.\n");
X  printf("-h lines     Set the size of the scrollback history buffer.\n");
X  printf("-i           Interrupt output sooner when flow control is on.\n");
X  printf("-l           Login mode on (update %s), -ln = off.\n", UTMPFILE);
X  printf("-list        or -ls. Do nothing, just list our SockDir.\n");
X  printf("-L           Terminal's last character can be safely updated.\n");
X  printf("-m           ignore $STY variable, do create a new screen session.\n");
X  printf("-O           Choose optimal output rather than exact vt100 emulation.\n");
X  printf("-q           Quiet startup. Exits with non-zero return code if unsuccessful.\n");
X  printf("-r           Reattach to a detached screen process.\n");
X  printf("-R           Reattach if possible, otherwise start a new session.\n");
X  printf("-s shell     Shell to execute rather than $SHELL.\n");
X  printf("-S sockname  Name this session <pid>.sockname instead of <pid>.<tty>.<host>.\n");
X  printf("-t title     Set command's a.k.a. (window title).\n");
X  printf("-T term      Use term as $TERM for windows, rather than \"screen\".\n");
X  printf("-v           Print \"Screen version %s\".\n", version);
X  printf("-wipe        Do nothing, just clean up SockDir.\n");
X#ifdef MULTI
X  printf("-x           Attach to a not detached screen. (Multi display mode).\n");
X#endif /* MULTI */
X  exit(1);
X}
X
X
X/*
X**   Here come the help page routines
X*/
X
Xextern struct comm comms[];
Xextern struct action ktab[];
X
Xstatic void HelpProcess __P((char **, int *));
Xstatic void HelpAbort __P((void));
Xstatic void HelpRedisplayLine __P((int, int, int, int));
Xstatic void HelpSetCursor __P((void));
Xstatic void add_key_to_buf __P((char *, int));
Xstatic int  helppage __P((void));
X
Xstruct helpdata
X{
X  int    maxrow, grow, numcols, numrows, num_names;
X  int    numskip, numpages;
X  int    command_search, command_bindings;
X  int   refgrow, refcommand_search;
X  int   inter, mcom, mkey;
X  int   nact[RC_LAST + 1];
X};
X
X#define MAXKLEN 256
X
Xstatic struct LayFuncs HelpLf =
X{
X  HelpProcess,
X  HelpAbort,
X  HelpRedisplayLine,
X  DefClearLine,
X  DefRewrite,
X  HelpSetCursor,
X  DefResize,
X  DefRestore
X};
X
X
Xvoid
Xdisplay_help()
X{
X  int i, n, key, mcom, mkey, l;
X  struct helpdata *helpdata;
X  int used[RC_LAST + 1];
X
X  if (d_height < 6)
X    {
X      Msg(0, "Window height too small for help page");
X      return;
X    }
X  if (InitOverlayPage(sizeof(*helpdata), &HelpLf, 0))
X    return;
X
X  helpdata = (struct helpdata *)d_lay->l_data;
X  helpdata->num_names = helpdata->command_bindings = 0;
X  helpdata->command_search = 0;
X  for (n = 0; n <= RC_LAST; n++)
X    used[n] = 0;
X  mcom = 0;
X  mkey = 0;
X  for (key = 0; key < 256; key++)
X    {
X      n = ktab[key].nr;
X      if (n == RC_ILLEGAL)
X    continue;
X      if (ktab[key].args == noargs)
X    {
X          used[n] += (key <= ' ' || key == 0x7f) ? 3 :
X                     (key > 0x7f) ? 5 : 2;
X    }
X      else
X    helpdata->command_bindings++;
X    }
X  for (n = i = 0; n <= RC_LAST; n++)
X    if (used[n])
X      {
X    l = strlen(comms[n].name);
X    if (l > mcom)
X      mcom = l;
X    if (used[n] > mkey)
X      mkey = used[n];
X        helpdata->nact[i++] = n;
X      }
X  debug1("help: %d commands bound to keys with no arguments\n", i);
X  debug2("mcom: %d  mkey: %d\n", mcom, mkey);
X  helpdata->num_names = i;
X
X  if (mkey > MAXKLEN)
X    mkey = MAXKLEN;
X  helpdata->numcols = (d_width - !CLP)/(mcom + mkey + 1);
X  if (helpdata->numcols == 0)
X    {
X      HelpAbort();
X      Msg(0, "Width too small");
X      return;
X    }
X  helpdata->inter = (d_width - !CLP - (mcom + mkey) * helpdata->numcols) / (helpdata->numcols + 1);
X  if (helpdata->inter <= 0)
X    helpdata->inter = 1;
X  debug1("inter: %d\n", helpdata->inter);
X  helpdata->mcom = mcom;
X  helpdata->mkey = mkey;
X  helpdata->numrows = (helpdata->num_names + helpdata->numcols - 1) / helpdata->numcols;
X  debug1("Numrows: %d\n", helpdata->numrows);
X  helpdata->numskip = d_height-5 - (2 + helpdata->numrows);
X  while (helpdata->numskip < 0)
X    helpdata->numskip += d_height-5;
X  helpdata->numskip %= d_height-5;
X  debug1("Numskip: %d\n", helpdata->numskip);
X  if (helpdata->numskip > d_height/3 || helpdata->numskip > helpdata->command_bindings)
X    helpdata->numskip = 1;
X  helpdata->maxrow = 2 + helpdata->numrows + helpdata->numskip + helpdata->command_bindings;
X  helpdata->grow = 0;
X
X  helpdata->numpages = (helpdata->maxrow + d_height-6) / (d_height-5);
X  helppage();
X}
X
Xstatic void
XHelpSetCursor()
X{
X  GotoPos(0, d_height - 1);
X}
X
Xstatic void
XHelpProcess(ppbuf, plen)
Xchar **ppbuf;
Xint *plen;
X{
X  int done = 0;
X
X  GotoPos(0, d_height-1);
X  while (!done && *plen > 0)
X    {
X      switch (**ppbuf)
X    {
X    case ' ':
X      if (helppage() == 0)
X            break;
X      /* FALLTHROUGH */
X    case '\r':
X    case '\n':
X      done = 1;
X      break;
X    default:
X      break;
X    }
X      ++*ppbuf;
X      --*plen;
X    }
X  if (done)
X    HelpAbort();
X}
X
Xstatic void
XHelpAbort()
X{
X  LAY_CALL_UP(Activate(0));
X  ExitOverlayPage();
X}
X
X
Xstatic int
Xhelppage()
X{
X  struct helpdata *helpdata;
X  int col, crow, n, key;
X  char buf[MAXKLEN], Esc_buf[5], cbuf[256];
X
X  helpdata = (struct helpdata *)d_lay->l_data;
X
X  if (helpdata->grow >= helpdata->maxrow)
X    {
X      return(-1);
X    }
X  helpdata->refgrow = helpdata->grow;
X  helpdata->refcommand_search = helpdata->command_search;
X
X  /* Clear the help screen */
X  SetAttrFont(0, ASCII);
X  ClearDisplay();
X
X  sprintf(cbuf,"Screen key bindings, page %d of %d.", helpdata->grow / (d_height-5) + 1, helpdata->numpages);
X  centerline(cbuf);
X  AddChar('\n');
X  crow = 2;
X
X  *Esc_buf = '\0';
X  add_key_to_buf(Esc_buf, Esc);
X
X  for (; crow < d_height - 3; crow++)
X    {
X      if (helpdata->grow < 1)
X        {
X         *buf = '\0';
X          add_key_to_buf(buf, MetaEsc);
X          sprintf(cbuf,"Command key:  %s   Literal %s:  %s", Esc_buf, Esc_buf, buf);
X          centerline(cbuf);
X      helpdata->grow++;
X        }
X      else if (helpdata->grow >= 2 && helpdata->grow-2 < helpdata->numrows)
X    {
X      for (col = 0; col < helpdata->numcols && (n = helpdata->numrows * col + (helpdata->grow-2)) < helpdata->num_names; col++)
X        {
X          AddStrn("", helpdata->inter - !col);
X          n = helpdata->nact[n];
X          debug1("help: searching key %d\n", n);
X          buf[0] = '\0';
X          for (key = 0; key < 256; key++)
X        if (ktab[key].nr == n && ktab[key].args == noargs)
X          {
X            strcat(buf, " ");
X            add_key_to_buf(buf, key);
X          }
X          AddStrn(comms[n].name, helpdata->mcom);
X          AddStrn(buf, helpdata->mkey);
X        }
X      AddStr("\r\n");
X          helpdata->grow++;
X        }
X      else if (helpdata->grow-2-helpdata->numrows >= helpdata->numskip
X               && helpdata->grow-2-helpdata->numrows-helpdata->numskip < helpdata->command_bindings)
X        {
X          char **pp, *cp;
X
X      while ((n = ktab[helpdata->command_search].nr) == RC_ILLEGAL
X         || ktab[helpdata->command_search].args == noargs)
X        {
X          if (++helpdata->command_search >= 256)
X        return -1;
X        }
X      buf[0] = '\0';
X      add_key_to_buf(buf, helpdata->command_search);
X      AddStrn(buf, 4);
X      col = 4;
X      AddStr(comms[n].name);
X      AddChar(' ');
X      col += strlen(comms[n].name) + 1;
X      pp = ktab[helpdata->command_search++].args;
X      while (pp && (cp = *pp) != NULL)
X        {
X          if (!*cp || (index(cp, ' ') != NULL))
X        {
X          if (index(cp, '\'') != NULL)
X            *buf = '"';
X          else
X            *buf = '\'';
X          sprintf(buf + 1, "%s%c", cp, *buf);
X          cp = buf;
X        }
X          if ((col += strlen(cp) + 1) >= d_width)
X        {
X          col = d_width - (col - (strlen(cp) + 1)) - 2;
X          if (col >= 0)
X            {
X              n = cp[col];
X              cp[col] = '\0';
X              AddStr(*pp);
X              AddChar('$');
X              cp[col] = (char) n;
X              }
X              break;
X            }
X          AddStr(cp);
X          AddChar((d_width - col != 1 || !pp[1]) ? ' ' : '$');
X          pp++;
X        }
X      AddStr("\r\n");
X      helpdata->grow++;
X    }
X      else
X    {
X          AddChar('\n');
X      helpdata->grow++;
X    }
X    }
X  AddChar('\n');
X  sprintf(cbuf,"[Press Space %s Return to end.]",
X     helpdata->grow < helpdata->maxrow ? "for next page;" : "or");
X  centerline(cbuf);
X  SetLastPos(0, d_height-1);
X  return(0);
X}
X
Xstatic void
Xadd_key_to_buf(buf, key)
Xchar *buf;
Xint key;
X{
X  debug1("help: key found: %c\n", key);
X  buf += strlen(buf);
X  if (key == ' ')
X    sprintf(buf, "sp");
X  else if (key < ' ' || key == 0x7f)
X    sprintf(buf, "^%c", (key ^ 0x40));
X  else if (key >= 0x80)
X    sprintf(buf, "\\%03o", key);
X  else
X    sprintf(buf, "%c", key);
X}
X
X
Xstatic void
XHelpRedisplayLine(y, xs, xe, isblank)
Xint y, xs, xe, isblank;
X{
X  if (y < 0)
X    {
X      struct helpdata *helpdata;
X
X      helpdata = (struct helpdata *)d_lay->l_data;
X      helpdata->grow = helpdata->refgrow;
X      helpdata->command_search = helpdata->refcommand_search;
X      helppage();
X      return;
X    }
X  if (y != 0 && y != d_height - 1)
X    return;
X  if (isblank)
X    return;
X  Clear(xs, y, xe, y);
X}
X
X
X/*
X**
X**    here is all the copyright stuff
X**
X*/
X
Xstatic void CopyrightProcess __P((char **, int *));
Xstatic void CopyrightRedisplayLine __P((int, int, int, int));
Xstatic void CopyrightAbort __P((void));
Xstatic void CopyrightSetCursor __P((void));
Xstatic void copypage __P((void));
X
Xstruct copydata
X{
X  char    *cps, *savedcps;    /* position in the message */
X  char    *refcps, *refsavedcps;    /* backup for redisplaying */
X};
X
Xstatic struct LayFuncs CopyrightLf =
X{
X  CopyrightProcess,
X  CopyrightAbort,
X  CopyrightRedisplayLine,
X  DefClearLine,
X  DefRewrite,
X  CopyrightSetCursor,
X  DefResize,
X  DefRestore
X};
X
Xstatic const char cpmsg[] = "\
X\n\
XiScreen version %v\n\
X\n\
XCopyright (c) 1993 Juergen Weigert, Michael Schroeder\n\
XCopyright (c) 1987 Oliver Laumann\n\
X\n\
XThis program is free software; you can redistribute it and/or \
Xmodify it under the terms of the GNU General Public License as published \
Xby the Free Software Foundation; either version 1, or (at your option) \
Xany later version.\n\
X\n\
XThis program is distributed in the hope that it will be useful, \
Xbut WITHOUT ANY WARRANTY; without even the implied warranty of \
XMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \
XGNU General Public License for more details.\n\
X\n\
XYou should have received a copy of the GNU General Public License \
Xalong with this program (see the file COPYING); if not, write to the \
XFree Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n\
X\n\
XSend bugreports, fixes, enhancements, t-shirts, money, beer & pizza to \
[e-mail]\n";
X
X
Xstatic void
XCopyrightSetCursor()
X{
X  GotoPos(0, d_height - 1);
X}
X
Xstatic void
XCopyrightProcess(ppbuf, plen)
Xchar **ppbuf;
Xint *plen;
X{
X  int done = 0;
X  struct copydata *copydata;
X
X  copydata = (struct copydata *)d_lay->l_data;
X  GotoPos(0, d_height - 1);
X  while (!done && *plen > 0)
X    {
X      switch (**ppbuf)
X    {
X    case ' ':
X          if (*copydata->cps)
X        {
X          copypage();
X          break;
X        }
X      /* FALLTHROUGH */
X    case '\r':
X    case '\n':
X      CopyrightAbort();
X      done = 1;
X      break;
X    default:
X      break;
X    }
X      ++*ppbuf;
X      --*plen;
X    }
X}
X
Xstatic void
XCopyrightAbort()
X{
X  LAY_CALL_UP(Activate(0));
X  ExitOverlayPage();
X}
X
Xvoid
Xdisplay_copyright()
X{
X  struct copydata *copydata;
X
X  if (d_width < 10 || d_height < 5)
X    {
X      Msg(0, "Window size too small for copyright page");
X      return;
X    }
X  if (InitOverlayPage(sizeof(*copydata), &CopyrightLf, 0))
X    return;
X  copydata = (struct copydata *)d_lay->l_data;
X  copydata->cps = (char *)cpmsg;
X  copydata->savedcps = 0;
X  copypage();
X}
X
X
Xstatic void
Xcopypage()
X{
X  register char *cps;
X  char *ws;
X  int x, y, l;
X  char cbuf[80];
X  struct copydata *copydata;
X
X  copydata = (struct copydata *)d_lay->l_data;
X  SetAttrFont(0, ASCII);
X  ClearDisplay();
X  x = y = 0;
X  cps = copydata->cps;
X  copydata->refcps = cps;
X  copydata->refsavedcps = copydata->savedcps;
X  while (*cps && y < d_height - 3)
X    {
X      ws = cps;
X      while (*cps == ' ')
X    cps++;
X      if (strncmp(cps, "%v", 2) == 0)
X    {
X      copydata->savedcps = cps + 2;
X      cps = version;
X      continue;
X    }
X      while (*cps && *cps != ' ' && *cps != '\n')
X    cps++;
X      l = cps - ws;
X      cps = ws;
X      if (l > d_width - 1)
X    l = d_width - 1;
X      if (x && x + l >= d_width - 2)
X    {
X      AddStr("\r\n");
X      x = 0;
X      y++;
X      continue;
X    }
X      if (x)
X    {
X      AddChar(' ');
X      x++;
X    }
X      if (l)
X        AddStrn(ws, l);
X      x += l;
X      cps += l;
X      if (*cps == 0 && copydata->savedcps)
X    {
X      cps = copydata->savedcps;
X      copydata->savedcps = 0;
X    }
X      if (*cps == '\n')
X    {
X      AddStr("\r\n");
X      x = 0;
X      y++;
X    }
X      if (*cps == ' ' || *cps == '\n')
X    cps++;
X    }
X  while (*cps == '\n')
X    cps++;
X  while (y++ < d_height - 2)
X    AddStr("\r\n");
X  sprintf(cbuf,"[Press Space %s Return to end.]",
X     *cps ? "for next page;" : "or");
X  centerline(cbuf);
X  SetLastPos(0, d_height-1);
X  copydata->cps = cps;
X}
X
Xstatic void
XCopyrightRedisplayLine(y, xs, xe, isblank)
Xint y, xs, xe, isblank;
X{
X  if (y < 0)
X    {
X      struct copydata *copydata;
X
X      copydata = (struct copydata *)d_lay->l_data;
X      copydata->cps = copydata->refcps;
X      copydata->savedcps = copydata->refsavedcps;
X      copypage();
X      return;
X    }
X  if (y != 0 && y != d_height - 1)
X    return;
X  if (isblank)
X    return;
X  Clear(xs, y, xe, y);
X}
X
END_OF_FILE
if test 15096 -ne `wc -c <'help.c'`; then
    echo shar: \"'help.c'\" unpacked with wrong size!
fi
# end of 'help.c'
fi
if test -f 'termcap.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'termcap.c'\"
else
echo shar: Extracting \"'termcap.c'\" \(14829 characters\)
sed "s/^X//" >'termcap.c' <<'END_OF_FILE'
X/* Copyright (c) 1993
X *      Juergen Weigert ([e-mail])
X *      Michael Schroeder ([e-mail])
X * Copyright (c) 1987 Oliver Laumann
X *
X * This program is free software; you can redistribute it and/or modify
X * it under the terms of the GNU General Public License as published by
X * the Free Software Foundation; either version 2, or (at your option)
X * any later version.
X *
X * This program is distributed in the hope that it will be useful,
X * but WITHOUT ANY WARRANTY; without even the implied warranty of
X * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X * GNU General Public License for more details.
X *
X * You should have received a copy of the GNU General Public License
X * along with this program (see the file COPYING); if not, write to the
X * Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X *
X ****************************************************************
X */
X
X#include "rcs.h"
XRCS_ID("$Id: termcap.c,v 1.3 1993/07/21 15:43:35 mlschroe Exp $ FAU")
X
X#include <sys/types.h>
X#include "config.h"
X#include "screen.h"
X#include "extern.h"
X
Xextern struct display *display;
X
Xstatic void  AddCap __P((char *));
Xstatic void  MakeString __P((char *, char *, int, char *));
Xstatic char *findcap __P((char *, char **, int));
Xstatic char *e_tgetstr __P((char *, char **));
Xstatic int   e_tgetflag __P((char *));
Xstatic int   e_tgetnum __P((char *));
X
Xextern struct term term[];    /* terminal capabilities */
Xextern struct NewWindow nwin_undef, nwin_default, nwin_options;
Xextern int force_vt, assume_LP;
Xextern int Z0width, Z1width;
X
Xchar Termcap[TERMCAP_BUFSIZE + 8];    /* new termcap +8:"TERMCAP=" */
Xstatic int Termcaplen;
Xstatic int tcLineLen;
Xchar Term[MAXSTR+5];        /* +5: "TERM=" */
Xchar screenterm[20];        /* new $TERM, usually "screen" */
X
Xchar *extra_incap, *extra_outcap;
X
Xstatic const char TermcapConst[] = "\\\n\
X\t:DO=\\E[%dB:LE=\\E[%dD:RI=\\E[%dC:UP=\\E[%dA:bs:bt=\\E[Z:\\\n\
X\t:cd=\\E[J:ce=\\E[K:cl=\\E[H\\E[J:cm=\\E[%i%d;%dH:ct=\\E[3g:\\\n\
X\t:do=^J:nd=\\E[C:pt:rc=\\E8:rs=\\Ec:sc=\\E7:st=\\EH:up=\\EM:\\\n\
X\t:le=^H:bl=^G:cr=^M:it#8:ho=\\E[H:nw=\\EE:ta=^I:is=\\E)0:";
X
Xchar *
Xgettermcapstring(s)
Xchar *s;
X{
X  int i;
X
X  if (display == 0 || s == 0)
X    return 0;
X  for (i = 0; i < T_N; i++)
X    {
X      if (term[i].type != T_STR)
X    continue;
X      if (strcmp(term[i].tcname, s) == 0)
X    return d_tcs[i].str;
X    }
X  return 0;
X}
X
Xint
XInitTermcap(wi, he)
Xint wi;
Xint he;
X{
X  register char *s;
X  int i;
X  char tbuf[TERMCAP_BUFSIZE], *tp;
X
X  ASSERT(display);
X  bzero(tbuf, sizeof(tbuf));
X  debug1("InitTermcap: looking for tgetent('%s')\n", d_termname);
X  if (tgetent(tbuf, d_termname) != 1)
X    {
X      Msg(0, "Cannot find termcap entry for %s.", d_termname);
X      return -1;
X    }
X  debug1("got it:\n%s\n",tbuf);
X#ifdef DEBUG
X  if (extra_incap)
X    debug1("Extra incap: %s\n", extra_incap);
X  if (extra_outcap)
X    debug1("Extra outcap: %s\n", extra_outcap);
X#endif
X  tp = d_tentry;
X
X  for (i = 0; i < T_N; i++)
X    {
X      switch(term[i].type)
X    {
X    case T_FLG:
X      d_tcs[i].flg = e_tgetflag(term[i].tcname);
X      break;
X    case T_NUM:
X      d_tcs[i].num = e_tgetnum(term[i].tcname);
X      break;
X    case T_STR:
X      d_tcs[i].str = e_tgetstr(term[i].tcname, &tp);
X      /* no empty strings, please */
X      if (d_tcs[i].str && *d_tcs[i].str == 0)
X        d_tcs[i].str = 0;
X      break;
X    default:
X      Panic(0, "Illegal tc type in entry #%d", i);
X      /*NOTREACHED*/
X    }
X    }
X  if (HC)
X    {
X      Msg(0, "You can't run screen on a hardcopy terminal.");
X      return -1;
X    }
X  if (OS)
X    {
X      Msg(0, "You can't run screen on a terminal that overstrikes.");
X      return -1;
X    }
X  if (NS)
X    {
X      Msg(0, "Terminal must support scrolling.");
X      return -1;
X    }
X  if (!CL)
X    {
X      Msg(0, "Clear screen capability required.");
X      return -1;
X    }
X  if (!CM)
X    {
X      Msg(0, "Addressable cursor capability required.");
X      return -1;
X    }
X  if ((s = getenv("COLUMNS")) && (i = atoi(s)) > 0)
X    CO = i;
X  if ((s = getenv("LINES")) && (i = atoi(s)) > 0)
X    LI = i;
X  if (wi)
X    CO = wi;
X  if (he)
X    LI = he;
X  if (CO <= 0)
X    CO = 80;
X  if (LI <= 0)
X    LI = 24;
X
X  if (nwin_options.flowflag == nwin_undef.flowflag)
X    nwin_default.flowflag = CNF ? FLOW_NOW * 0 :
X                XO ? FLOW_NOW * 1 :
X                FLOW_AUTOFLAG;
X  CLP |= assume_LP || !AM || XV || XN ||
X     (!extra_incap && !strncmp(d_termname, "vt", 2));
X  if (!(BL = e_tgetstr("bl", &tp)))
X  if (!BL)
X    BL = "\007";
X  if (!BC)
X    {
X      if (BS)
X    BC = "\b";
X      else
X    BC = LE;
X    }
X  if (!CR)
X    CR = "\r";
X  if (!NL)
X    NL = "\n";
X  if (SG <= 0 && UG <= 0)
X    {
X      /*
X       * Does ME also reverse the effect of SO and/or US?  This is not
X       * clearly specified by the termcap manual. Anyway, we should at
X       * least look whether ME and SE/UE are equal:
X       */
X      if (UE && ((SE && strcmp(SE, UE) == 0) || (ME && strcmp(ME, UE) == 0)))
X    UE = 0;
X      if (SE && (ME && strcmp(ME, SE) == 0))
X    SE = 0;
X
X      for (i = 0; i < NATTR; i++)
X    d_attrtab[i] = d_tcs[T_ATTR + i].str;
X      /* Set up missing entries */
X      s = 0;
X      for (i = NATTR-1; i >= 0; i--)
X    if (d_attrtab[i])
X      s = d_attrtab[i];
X      for (i = 0; i < NATTR; i++)
X    {
X      if (d_attrtab[i] == 0)
X        d_attrtab[i] = s;
X      else
X        s = d_attrtab[i];
X    }
X    }
X  else
X    {
X      MS = 1;
X      for (i = 0; i < NATTR; i++)
X    d_attrtab[i] = d_tcs[T_ATTR + i].str = 0;
X    }
X  if (!DO)
X    DO = NL;
X  if (!SF)
X    SF = NL;
X  if (IN)
X    IC = IM = 0;
X  if (EI == 0)
X    IM = 0;
X  /* some strange termcap entries have IC == IM */
X  if (IC && IM && strcmp(IC, IM) == 0)
X    IC = 0;
X  if (KE == 0)
X    KS = 0;
X  if (CCE == 0)
X    CCS = 0;
X  if (CG0)
X    {
X      if (CS0 == 0)
X#ifdef TERMINFO
X        CS0 = "\033(%p1%c";
X#else
X        CS0 = "\033(%.";
X#endif
X      if (CE0 == 0)
X        CE0 = "\033(B";
X    }
X  else if (AS && AE)
X    {
X      CG0 = 1;
X      CS0 = AS;
X      CE0 = AE;
X      CC0 = AC;
X    }
X  else
X    {
X      CS0 = CE0 = "";
X      CC0 = "g.h.i'j-k-l-m-n+o~p\"q-r-s_t+u+v+w+x|y<z>";
X    }
X  for (i = 0; i < 256; i++)
X    d_c0_tab[i] = i;
X  if (CC0)
X    for (i = strlen(CC0) & ~1; i >= 0; i -= 2)
X      d_c0_tab[(unsigned int)CC0[i]] = CC0[i + 1];
X  debug1("ISO2022 = %d\n", CG0);
X  if (PF == 0)
X    PO = 0;
X  debug2("terminal size is %d, %d (says TERMCAP)\n", CO, LI);
X
X  /* Termcap fields Z0 & Z1 contain width-changing sequences. */
X  if (CZ1 == 0)
X    CZ0 = 0;
X  Z0width = 132;
X  Z1width = 80;
X
X  CheckScreenSize(0);
X
X  if (TS == 0 || FS == 0 || DS == 0)
X    HS = 0;
X  if (HS)
X    {
X      debug("oy! we have a hardware status line, says termcap\n");
X      if (WS <= 0)
X        WS = d_width;
X    }
X
X  d_UPcost = CalcCost(UP);
X  d_DOcost = CalcCost(DO);
X  d_NLcost = CalcCost(NL);
X  d_LEcost = CalcCost(BC);
X  d_NDcost = CalcCost(ND);
X  d_CRcost = CalcCost(CR);
X  d_IMcost = CalcCost(IM);
X  d_EIcost = CalcCost(EI);
X
X#ifdef AUTO_NUKE
X  if (CAN)
X    {
X      debug("termcap has AN, setting autonuke\n");
X      d_auto_nuke = 1;
X    }
X#endif
X  if (COL > 0)
X    {
X      debug1("termcap has OL (%d), setting limit\n", COL);
X      d_obufmax = COL;
X    }
X
X  d_tcinited = 1;
X  MakeTermcap(0);
X  return 0;
X}
X
X
Xstatic void
XAddCap(s)
Xchar *s;
X{
X  register int n;
X
X  if (tcLineLen + (n = strlen(s)) > 55 && Termcaplen < TERMCAP_BUFSIZE - 4)
X    {
X      strcpy(Termcap + Termcaplen, "\\\n\t:");
X      Termcaplen += 4;
X      tcLineLen = 0;
X    }
X  if (Termcaplen + n < TERMCAP_BUFSIZE)
X    {
X      strcpy(Termcap + Termcaplen, s);
X      Termcaplen += n;
X      tcLineLen += n;
X    }
X  else
X    Panic(0, "TERMCAP overflow - sorry.");
X}
X
Xchar *
XMakeTermcap(aflag)
Xint aflag;
X{
X  char buf[TERMCAP_BUFSIZE];
X  register char *p, *cp, *s, ch, *tname;
X  int i, wi, he;
X
X  if (display)
X    {
X      wi = d_width;
X      he = d_height;
X      tname = d_termname;
X    }
X  else
X    {
X      wi = 80;
X      he = 24;
X      tname = "vt100";
X    }
X  debug1("MakeTermcap(%d)\n", aflag);
X  if ((s = getenv("SCREENCAP")) && strlen(s) < TERMCAP_BUFSIZE)
X    {
X      sprintf(Termcap, "TERMCAP=%s", s);     /* TERMCAP_BUFSIZE + ... ? XXX */
X      sprintf(Term, "TERM=screen");
X      debug("getenvSCREENCAP o.k.\n");
X      return Termcap;
X    }
X  Termcaplen = 0;
X  debug1("MakeTermcap screenterm='%s'\n", screenterm);
X  debug1("MakeTermcap termname='%s'\n", tname);
X  if (*screenterm == '\0')
X    {
X      debug("MakeTermcap sets screenterm=screen\n");
X      strcpy(screenterm, "screen");
X    }
X  do
X    {
X      sprintf(Term, "TERM=");
X      p = Term + 5;
X      if (!aflag && strlen(screenterm) + strlen(tname) < MAXSTR-1)
X    {
X      sprintf(p, "%s.%s", screenterm, tname);
X      if (tgetent(buf, p) == 1)
X        break;
X    }
X      if (wi >= 132)
X    {
X      sprintf(p, "%s-w", screenterm);
X          if (tgetent(buf, p) == 1)
X        break;
X    }
X      sprintf(p, "%s", screenterm);
X      if (tgetent(buf, p) == 1)
X    break;
X      sprintf(p, "vt100");
X    }
X  while (0);        /* Goto free programming... */
X  tcLineLen = 100;    /* Force NL */
X  sprintf(Termcap,
X      "TERMCAP=SC|%s|VT 100/ANSI X3.64 virtual terminal|", Term + 5);
X  Termcaplen = strlen(Termcap);
X  debug1("MakeTermcap decided '%s'\n", p);
X  if (extra_outcap && *extra_outcap)
X    {
X      for (cp = extra_outcap; (p = index(cp, ':')); cp = p)
X    {
X      ch = *++p;
X      *p = '\0';
X      AddCap(cp);
X      *p = ch;
X    }
X      tcLineLen = 100;    /* Force NL */
X    }
X  debug1("MakeTermcap after outcap '%s'\n", (char *)TermcapConst);
X  if (Termcaplen + strlen(TermcapConst) < TERMCAP_BUFSIZE)
X    {
X      strcpy(Termcap + Termcaplen, (char *)TermcapConst);
X      Termcaplen += strlen(TermcapConst);
X    }
X  sprintf(buf, "li#%d:co#%d:", he, wi);
X  AddCap(buf);
X  AddCap("am:");
X  if (aflag || (force_vt && !COP) || CLP || !AM)
X    {
X      AddCap("xn:");
X      AddCap("xv:");
X      AddCap("LP:");
X    }
X  if (aflag || (CS && SR) || AL || CAL)
X    {
X      AddCap("sr=\\EM:");
X      AddCap("al=\\E[L:");
X      AddCap("AL=\\E[%dL:");
X    }
X  else if (SR)
X    AddCap("sr=\\EM:");
X  if (aflag || CS)
X    AddCap("cs=\\E[%i%d;%dr:");
X  if (aflag || CS || DL || CDL)
X    {
X      AddCap("dl=\\E[M:");
X      AddCap("DL=\\E[%dM:");
X    }
X  if (aflag || DC || CDC)
X    {
X      AddCap("dc=\\E[P:");
X      AddCap("DC=\\E[%dP:");
X    }
X  if (aflag || CIC || IC || IM)
X    {
X      AddCap("im=\\E[4h:");
X      AddCap("ei=\\E[4l:");
X      AddCap("mi:");
X      AddCap("IC=\\E[%d@:");
X    }
X  if (display)
X    {
X      if (US)
X    {
X      AddCap("us=\\E[4m:");
X      AddCap("ue=\\E[24m:");
X    }
X      if (SO)
X    {
X      AddCap("so=\\E[3m:");
X      AddCap("se=\\E[23m:");
X    }
X      if (MB)
X    AddCap("mb=\\E[5m:");
X      if (MD)
X    AddCap("md=\\E[1m:");
X      if (MH)
X    AddCap("mh=\\E[2m:");
X      if (MR)
X    AddCap("mr=\\E[7m:");
X      if (MB || MD || MH || MR)
X    AddCap("me=\\E[m:ms:");
X      if (VB)
X    AddCap("vb=\\E[?5h\\E[?5l:");
X      if (KS)
X    {
X      AddCap("ks=\\E=:");
X      AddCap("ke=\\E>:");
X    }
X      if (CCS)
X    {
X      AddCap("CS=\\E[?1h:");
X      AddCap("CE=\\E[?1l:");
X    }
X      if (CG0)
X    {
X      AddCap("G0:");
X      AddCap("as=\\E(0:");
X      AddCap("ae=\\E(B:");
X    }
X      if (PO)
X    {
X      AddCap("po=\\E[5i:");
X      AddCap("pf=\\E[4i:");
X    }
X      if (CZ0)
X    {
X      AddCap("Z0=\\E[?3h:");
X      AddCap("Z1=\\E[?3l:");
X    }
X      if (CWS)
X    AddCap("WS=\\E[8;%d;%dt:");
X      for (i = T_CAPS; i < T_ECAPS; i++)
X    {
X      switch(term[i].type)
X        {
X        case T_STR:
X          if (d_tcs[i].str == 0)
X        break;
X          MakeString(term[i].tcname, buf, sizeof(buf), d_tcs[i].str);
X          AddCap(buf);
X          break;
X        case T_FLG:
X          if (d_tcs[i].flg == 0)
X        break;
X          sprintf(buf, "%s:", term[i].tcname);
X          AddCap(buf);
X          break;
X        default:
X          break;
X        }
X    }
X    }
X  debug("MakeTermcap: end\n");
X  return Termcap;
X}
X
Xstatic void
XMakeString(cap, buf, buflen, s)
Xchar *cap, *buf;
Xint buflen;
Xchar *s;
X{
X  register char *p, *pmax;
X  register unsigned int c;
X
X  p = buf;
X  pmax = p + buflen - (3+4+2);
X  *p++ = *cap++;
X  *p++ = *cap;
X  *p++ = '=';
X  while ((c = *s++) && (p < pmax))
X    {
X      switch (c)
X    {
X    case '\033':
X      *p++ = '\\';
X      *p++ = 'E';
X      break;
X    case ':':
X      sprintf(p, "\\072");
X      p += 4;
X      break;
X    case '^':
X    case '\\':
X      *p++ = '\\';
X      *p++ = c;
X      break;
X    default:
X      if (c >= 200)
X        {
X          sprintf(p, "\\%03o", c & 0377);
X          p += 4;
X        }
X      else if (c < ' ')
X        {
X          *p++ = '^';
X          *p++ = c + '@';
X        }
X      else
X        *p++ = c;
X    }
X    }
X  *p++ = ':';
X  *p = '\0';
X}
X
X
X/*
X**
X**  Termcap routines that use our extra_incap
X**
X*/
X
X
X/* findcap:
X *   cap = capability we are looking for
X *   tepp = pointer to bufferpointer
X *   n = size of buffer (0 = infinity)
X */
X
Xstatic char *
Xfindcap(cap, tepp, n)
Xchar *cap;
Xchar **tepp;
Xint n;
X{
X  char *tep;
X  char c, *p, *cp;
X  int mode;    /* mode: 0=LIT  1=^  2=\x  3,4,5=\nnn */
X  int num = 0, capl;
X
X  if (!extra_incap)
X    return (0);
X  tep = *tepp;
X  capl = strlen(cap);
X  cp = 0;
X  mode = 0;
X  for (p = extra_incap; *p; )
X    {
X      if (strncmp(p, cap, capl) == 0)
X    {
X      p += capl;
X      c = *p;
X      if (c && c != ':' && c != '@')
X        p++;
X      if (c == 0 || c == '@' || c == '=' || c == ':' || c == '#')
X        cp = tep;
X    }
X      while ((c = *p))
X    {
X      p++;
X      if (mode == 0)
X        {
X          if (c == ':')
X            break;
X          if (c == '^')
X        mode = 1;
X          if (c == '\\')
X        mode = 2;
X        }
X      else if (mode == 1)
X        {
X          mode = 0;
X          c = c & 0x1f;
X        }
X      else if (mode == 2)
X        {
X          mode = 0;
X          switch(c)
X        {
X        case '0':
X        case '1':
X        case '2':
X        case '3':
X        case '4':
X        case '5':
X        case '6':
X        case '7':
X        case '8':
X        case '9':
X          mode = 3;
X          num = 0;
X          break;
X        case 'E':
X          c = 27;
X          break;
X        case 'n':
X          c = '\n';
X          break;
X        case 'r':
X          c = '\r';
X          break;
X        case 't':
X          c = '\t';
X          break;
X        case 'b':
X          c = '\b';
X          break;
X        case 'f':
X          c = '\f';
X          break;
X        }
X        }
X      if (mode > 2)
X        {
X          num = num * 8 + (c - '0');
X          if (mode++ == 5 || (*p < '0' || *p > '9'))
X        {
X          c = num;
X          mode = 0;
X        }
X        }
X      if (mode)
X        continue;
X
X      if (cp && n != 1)
X        {
X          *cp++ = c;
X          n--;
X        }
X    }
X      if (cp)
X    {
X      *cp++ = 0;
X      *tepp = cp;
X      debug2("'%s' found in extra_incap -> %s\n", cap, tep);
X      return(tep);
X    }
X    }
X  return(0);
X}
X
Xstatic char *
Xe_tgetstr(cap, tepp)
Xchar *cap;
Xchar **tepp;
X{
X  char *tep, *tgetstr();
X  if ((tep = findcap(cap, tepp, 0)))
X    return((*tep == '@') ? 0 : tep);
X  return (tgetstr(cap, tepp));
X}
X
Xstatic int
Xe_tgetflag(cap)
Xchar *cap;
X{
X  char buf[2], *bufp;
X  char *tep;
X  bufp = buf;
X  if ((tep = findcap(cap, &bufp, 2)))
X    return((*tep == '@') ? 0 : 1);
X  return (tgetflag(cap));
X}
X
Xstatic int
Xe_tgetnum(cap)
Xchar *cap;
X{
X  char buf[20], *bufp;
X  char *tep, c;
X  int res, base = 10;
X
X  bufp = buf;
X  if ((tep = findcap(cap, &bufp, 20)))
X    {
X      c = *tep;
X      if (c == '@')
X    return(-1);
X      if (c == '0')
X    base = 8;
X      res = 0;
X      while ((c = *tep++) >= '0' && c <= '9')
X    res = res * base + (c - '0');
X      return(res);
X    }
X  return (tgetnum(cap));
X}
END_OF_FILE
if test 14829 -ne `wc -c <'termcap.c'`; then
    echo shar: \"'termcap.c'\" unpacked with wrong size!
fi
# end of 'termcap.c'
fi
if test -f 'utmp.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'utmp.c'\"
else
echo shar: Extracting \"'utmp.c'\" \(18794 characters\)
sed "s/^X//" >'utmp.c' <<'END_OF_FILE'
X/* Copyright (c) 1993
X *      Juergen Weigert ([e-mail])
X *      Michael Schroeder ([e-mail])
X * Copyright (c) 1987 Oliver Laumann
X *
X * This program is free software; you can redistribute it and/or modify
X * it under the terms of the GNU General Public License as published by
X * the Free Software Foundation; either version 2, or (at your option)
X * any later version.
X *
X * This program is distributed in the hope that it will be useful,
X * but WITHOUT ANY WARRANTY; without even the implied warranty of
X * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X * GNU General Public License for more details.
X *
X * You should have received a copy of the GNU General Public License
X * along with this program (see the file COPYING); if not, write to the
X * Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X *
X ****************************************************************
X */
X
X#include "rcs.h"
XRCS_ID("$Id: utmp.c,v 1.3 1993/07/21 15:43:38 mlschroe Exp $ FAU")
X
X
X/*
X * An explanation of some weird things:
X *
X *  linux should have GETUTENT, but their pututline() doesn't have
X *  a return value.
X *
X *  UTNOKEEP: A (ugly) hack for apollo, that does two things:
X *    1) Always close and reopen the utmp file descriptor. (I don't know
X *       for what reason this is done...)
X *    2) Implement an unsortet utmp file much like GETUTENT.
X *  (IMHO these two features should be split!)
X */
X
X
X#include <sys/types.h>
X#include <sys/stat.h>
X#include <fcntl.h>
X
X#include "config.h"
X#include "screen.h"
X#include "extern.h"
X
X
Xextern struct display *display;
Xextern struct win *fore;
Xextern char *LoginName;
X#ifdef NETHACK
Xextern nethackflag;
X#endif
X
X#ifdef UTMPOK
X
Xstatic slot_t TtyNameSlot __P((char *));
Xstatic int utmpok, utmpfd = -1;
Xstatic char UtmpName[] = UTMPFILE;
X
X
X# if defined(GETUTENT) && !defined(SVR4)
X#  if defined(hpux) /* cruel hpux release 8.0 */
X#   define pututline _pututline
X#  endif /* hpux */
Xextern struct utmp *getutline(), *pututline();
X#  if defined(_SEQUENT_)
Xextern struct utmp *ut_add_user(), *ut_delete_user();
Xextern char *ut_find_host();
X#   define UTHOST        /* _SEQUENT_ has got ut_find_host() */
X#  endif /* _SEQUENT_ */
X# endif /* GETUTENT && !SVR4 */
X
X# if defined (GETTTYENT) && !defined(GETUTENT)
X#   include <ttyent.h>
X# endif /* GETUTENT */
X
X# if !defined(GETTTYENT) && !defined(GETUTENT) && !defined(UTNOKEEP)
Xstruct ttyent
X{
X  char *ty_name;
X};
Xstatic void setttyent __P((void));
Xstatic struct ttyent *getttyent __P((void));
Xstatic char *tt, *ttnext;
Xstatic char ttys[] = "/etc/ttys";
X# endif /* !GETTTYENT && !GETUTENT && !UTNOKEEP */
X
X#endif /* UTMPOK */
X
X
X
X/*
X * SlotToggle - modify the utmp slot of the fore window.
X *
X * how > 0    do try to set a utmp slot.
X * how = 0    try to withdraw a utmp slot.
X *
X * w_slot = -1  window not logged in.
X * w_slot = 0   window not logged in, but should be logged in.
X *              (unable to write utmp, or detached).
X */
Xvoid
XSlotToggle(how)
Xint how;
X{
X  debug1("SlotToggle %d\n", how);
X#ifdef UTMPOK
X  if (how)
X    {
X      debug(" try to log in\n");
X      if ((fore->w_slot == (slot_t) -1) || (fore->w_slot == (slot_t) 0))
X    {
X# ifdef USRLIMIT
X          if (CountUsers() >= USRLIMIT)
X            Msg(0, "User limit reached.");
X          else
X# endif
X            {
X              if (SetUtmp(fore) == 0)
X                Msg(0, "This window is now logged in.");
X              else
X                Msg(0, "This window should now be logged in.");
X            }
X    }
X      else
X    Msg(0, "This window is already logged in.");
X    }
X  else
X    {
X      debug(" try to log out\n");
X      if (fore->w_slot == (slot_t) -1)
X    Msg(0, "This window is already logged out\n");
X      else if (fore->w_slot == (slot_t) 0)
X    {
X      debug("What a relief! In fact, it was not logged in\n");
X      Msg(0, "This window is not logged in.");
X      fore->w_slot = (slot_t) -1;
X    }
X      else
X    {
X      RemoveUtmp(fore);
X      if (fore->w_slot != (slot_t) -1)
X        Msg(0, "What? Cannot remove Utmp slot?");
X      else
X        Msg(0, "This window is no longer logged in.");
X    }
X    }
X#else    /* !UTMPOK */
X  Msg(0, "Unable to modify %s.\n", UTMPFILE);
X#endif
X}
X
X
X#ifdef UTMPOK
X
X
Xvoid
XInitUtmp()
X{
X  debug1("InitUtmp testing '%s'...\n", UtmpName);
X  if ((utmpfd = open(UtmpName, O_RDWR)) == -1)
X    {
X      if (errno != EACCES)
X    Msg(errno, UtmpName);
X      debug("InitUtmp failed.\n");
X      utmpok = 0;
X      return;
X    }
X# ifdef GETUTENT
X  close(utmpfd);    /* it was just a test */
X  utmpfd = -1;
X# endif /* GETUTENT */
X  utmpok = 1;
X}
X
X
X#ifdef USRLIMIT
Xint
XCountUsers()
X{
X# ifdef GETUTENT
X  struct utmp *ut, *getutent();
X# else /* GETUTENT */
X  struct utmp utmpbuf;
X# endif /* GETUTENT */
X  int UserCount;
X
X# ifdef UTNOKEEP
X  InitUtmp();
X# endif /* UTNOKEEP */
X  debug1("CountUsers() - utmpok=%d\n", utmpok);
X  if (!utmpok)
X    return(0);
X  UserCount = 0;
X# ifdef GETUTENT
X  setutent();
X  while (ut = getutent())
X    if (ut->ut_type == USER_PROCESS)
X      UserCount++;
X# else /* GETUTENT */
X  (void) lseek(utmpfd, (off_t) 0, 0);
X  while (read(utmpfd, &utmpbuf, sizeof(struct utmp)) > 0)
X    {
X      if (utmpbuf.ut_name[0] != '\0')
X       UserCount++;
X    }
X# endif /* GETUTENT */
X# ifdef UTNOKEEP
X  close(utmpfd);
X# endif /* UTNOKEEP */
X  return(UserCount);
X}
X#endif /* USRLIMIT */
X
X
X
X/*
X * the utmp entry for tty is located and removed.
X * it is stored in d_utmp_logintty.
X */
Xvoid
XRemoveLoginSlot()
X{
X# ifdef GETUTENT
X  struct utmp *uu;
X# endif /* GETUTENT */
X  struct utmp u;    /* 'empty' slot that we write back */
X# ifdef _SEQUENT_
X  char *p;
X# endif /* _SEQUENT_ */
X
X  ASSERT(display);
X  debug("RemoveLoginSlot: removing your logintty\n");
X  d_loginslot = TtyNameSlot(d_usertty);
X# ifdef UTNOKEEP
X  InitUtmp();
X# endif /* UTNOKEEP */
X  if (!utmpok)
X    {
X      debug("RemoveLoginSlot: utmpok == 0\n");
X      return;
X    }
X  if (d_loginslot == (slot_t)0 || d_loginslot == (slot_t)-1)
X    {
X      return;
X    }
X# ifdef _SEQUENT_
X  if (p = ut_find_host(d_loginslot))
X    strncpy(d_loginhost, p, sizeof(d_loginhost) - 1);
X  d_loginhost[sizeof(d_loginhost) - 1] = 0;
X# endif /* _SEQUENT_ */
X
X  bzero((char *) &u, sizeof u);
X
X# ifdef GETUTENT
X  setutent();
X  strncpy(u.ut_line, d_loginslot, sizeof(u.ut_line));
X  if ((uu = getutline(&u)) == 0)
X    {
X      Msg(0, "Utmp slot not found -> not removed");
X      return;
X    }
X  d_utmp_logintty = *uu;
X#  ifdef _SEQUENT_
X  if (ut_delete_user(d_loginslot, uu->ut_pid, 0, 0) == 0)
X#  else /* _SEQUENT_ */
X  u = *uu;
X  u.ut_type = DEAD_PROCESS;
X  u.ut_exit.e_termination = 0;
X  u.ut_exit.e_exit= 0;
X  if (pututline(&u) == 0)
X#  endif /* _SEQUENT_ */
X
X# else /* GETUTENT */
X
X  (void) lseek(utmpfd, (off_t) (d_loginslot * sizeof u), 0);
X  bzero((char *)&d_utmp_logintty, sizeof u);
X  if (read(utmpfd, (char *) &d_utmp_logintty, sizeof u) != sizeof u)
X    {
X      Msg(errno, "cannot read %s ??", UTMPFILE);
X      sleep(1);
X    }
X  (void) lseek(utmpfd, (off_t) (d_loginslot * sizeof u), 0);
X#  ifdef UTNOKEEP
X  /*
X   * as the utmp file is not sorted, we want to mark this slot occupied,
X   * as RestoreLoginSlot() will write exactly here.
X   */
X  bcopy((char *)&d_utmp_logintty, (char *)&u, sizeof u);
X  bzero(u.ut_name, sizeof(u.ut_name));
X  bzero(u.ut_host, sizeof(u.ut_host));
X#  endif /* UTNOKEEP */
X  if (write(utmpfd, (char *) &u, sizeof u) != sizeof u)
X
X# endif /* GETUTENT */
X
X    {
X# ifdef NETHACK
X      if (nethackflag)
X    {
X      Msg(errno, "%s is too hard to dig in", UTMPFILE);
X    }
X      else
X# endif /* NETHACK */
X    {
X      Msg(errno, "Could not write %s", UTMPFILE);
X    }
X    }
X# ifdef UTNOKEEP
X  close(utmpfd);
X# endif /* UTNOKEEP */
X  debug1(" slot %d zapped\n", (int)d_loginslot);
X}
X
X/*
X * d_utmp_logintty is reinserted into utmp
X */
Xvoid
XRestoreLoginSlot()
X{
X  debug("RestoreLoginSlot()\n");
X  ASSERT(display);
X# ifdef UTNOKEEP
X  InitUtmp();
X# endif /* UTNOKEEP */
X  if (utmpok && d_loginslot != (slot_t)0 && d_loginslot != (slot_t)-1)
X    {
X# ifdef GETUTENT
X#  ifdef _SEQUENT_
X      int fail;
X      debug1(" logging you in again (slot %s)\n", d_loginslot);
X/*
X * We have problems if we add the console and use ut_add_user()
X * because the id will be 'scon' instead of 'co'. So we
X * restore it with pututline(). The reason why we don't use
X * pututline all the time is that we want to set the host field.
X * Unfortunatelly this can only be done with ut_add_user().
X */
X      if (*d_loginhost)
X        {
X          fail = (ut_add_user(d_utmp_logintty.ut_name, d_loginslot, d_utmp_logintty.ut_pid,
X                              *d_loginhost ? d_loginhost : (char *)0) == 0);
X        }
X      else
X        {
X          setutent();
X          fail = (pututline(&d_utmp_logintty) == 0);
X        }
X      if (fail)
X#  else    /* _SEQUENT_ */
X      debug1(" logging you in again (slot %s)\n", d_loginslot);
X      setutent();
X      if (pututline(&d_utmp_logintty)==0)
X#  endif    /* _SEQUENT */
X# else    /* GETUTENT */
X      debug1(" logging you in again (slot %d)\n", d_loginslot);
X#  ifdef sequent
X      /*
X       * call sequent undocumented routine to count logins
X       * and add utmp entry if possible
X       */
X      if (add_utmp(d_loginslot, &d_utmp_logintty) == -1)
X#  else /* sequent */
X      (void) lseek(utmpfd, (off_t) (d_loginslot * sizeof(struct utmp)), 0);
X      if (write(utmpfd, (char *) &d_utmp_logintty, sizeof(struct utmp))
X      != sizeof(struct utmp))
X#  endif /* sequent */
X# endif    /* GETUTENT */
X        {
X# ifdef NETHACK
X          if (nethackflag)
X            Msg(errno, "%s is too hard to dig in", UTMPFILE);
X      else
X# endif /* NETHACK */
X          Msg(errno,"Could not write %s", UTMPFILE);
X        }
X    }
X# ifdef UTNOKEEP
X  close(utmpfd);
X# endif /* UTNOKEEP */
X  d_loginslot = (slot_t) 0;
X}
X
X
X
X/*
X * Construct a utmp entry for window wi.
X * the hostname field reflects what we know about the d_user (i.e. display)
X * location. If d_loginhost is not set, then he is local and we write
X * down the name of his terminal line; else he is remote and we keep
X * the hostname here. The letter S and the window id will be appended.
X * A saved utmp entry in wi->w_savut serves as a template, usually.
X */
X
Xint
XSetUtmp(wi)
Xstruct win *wi;
X{
X  register char *p;
X  register slot_t slot;
X# ifndef _SEQUENT_
X  char *line;
X# endif
X  struct utmp u;
X  int saved_ut;
X# ifdef UTHOST
X#  ifdef _SEQUENT_
X  char host[100+5];
X#  else /* _SEQUENT_ */
X  char host[sizeof(d_utmp_logintty.ut_host)+5];
X#  endif /* _SEQUENT_ */
X# endif /* UTHOST */
X
X  wi->w_slot = (slot_t) 0;
X  if (!utmpok)
X    return -1;
X  if ((slot = TtyNameSlot(wi->w_tty)) == (slot_t) NULL)
X    {
X      debug1("SetUtmp failed (tty %s).\n",wi->w_tty);
X      return -1;
X    }
X  debug2("SetUtmp %d will get slot %d...\n", wi->w_number, (int)slot);
X# ifdef UTNOKEEP
X  /* open here, as TtyNameSlot used (and closed) our filedescriptor */
X  InitUtmp();
X# endif /* UTNOKEEP */
X
X  bzero((char *) &u, sizeof u);
X  if ((saved_ut = bcmp((char *) &wi->w_savut, (char *) &u, sizeof u)))
X    /* restore original, of which we will adopt all fields but ut_host */
X    bcopy((char *) &wi->w_savut, (char *) &u, sizeof u);
X
X# ifdef UTHOST
X  host[sizeof(host)-5] = '\0';
X  if (display)
X    {
X#  ifdef _SEQUENT_
X      strncpy(host, d_loginhost, sizeof(host) - 5);
X#  else /* _SEQUENT */
X      strncpy(host, d_utmp_logintty.ut_host, sizeof(host) - 5);
X#  endif /* _SEQUENT */
X      if (d_loginslot != (slot_t)0 && d_loginslot != (slot_t)-1 && host[0] != '\0')
X    {
X      /*
X       * we want to set our ut_host field to something like
X       * ":ttyhf:s.0" or
X       * "faui45:s.0" or
X       * "132.199.81.4:s.0" (even this may hurt..), but not
X       * "faui45.informati"......:s.0
X       */
X      for (p = host; *p; p++)
X        if ((*p < '0' || *p > '9') && (*p != '.'))
X          break;
X      if (*p)
X        {
X          for (p = host; *p; p++)
X        if (*p == '.')
X          {
X            *p = '\0';
X            break;
X          }
X        }
X    }
X      else
X    {
X      strncpy(host + 1, stripdev(d_usertty), sizeof(host) - 6);
X      host[0] = ':';
X    }
X    }
X  else
X    strncpy(host, "local", sizeof(host) - 5);
X  sprintf(host + strlen(host), ":S.%c", '0' + wi->w_number);
X  debug1("rlogin hostname: '%s'\n", host);
X#  if !defined(_SEQUENT_) && !defined(sequent)
X  strncpy(u.ut_host, host, sizeof(u.ut_host));
X#  endif
X# endif /* UTHOST */
X
X# ifdef _SEQUENT_
X  if (ut_add_user(saved_ut ? u.ut_user : LoginName, slot, saved_ut ? u.ut_pid : wi->w_pid, host) == 0)
X# else /* _SEQUENT_ */
X  if (!saved_ut)
X    { /* make new utmp from scratch */
X      line = stripdev(wi->w_tty);
X#  ifdef GETUTENT
X      strncpy(u.ut_user, LoginName, sizeof(u.ut_user));
X#   ifdef sgi
X      strncpy(u.ut_id, line + 3, sizeof(u.ut_id));
X#   else /* sgi */
X      strncpy(u.ut_id, line + strlen(line) - 2, sizeof(u.ut_id));
X#   endif /* sgi */
X      strncpy(u.ut_line, line, sizeof(u.ut_line));
X      u.ut_pid = wi->w_pid;
X      u.ut_type = USER_PROCESS;
X      (void) time((time_t *)&u.ut_time);
X    } /* !saved_ut {-: */
X  setutent();
X  if (pututline(&u) == 0)
X#  else    /* GETUTENT */
X      strncpy(u.ut_line, line, sizeof(u.ut_line));
X      strncpy(u.ut_name, LoginName, sizeof(u.ut_name));
X#   if defined(linux)    /* should have GETUTENT */
X      u.ut_type = USER_PROCESS;
X      u.ut_pid = wi->w_pid;
X      strncpy(u.ut_id, line + 3, sizeof(u.ut_id));
X#   endif /* linux */
X      (void) time((time_t *)&u.ut_time);
X    } /* !saved_ut */
X#   ifdef sequent
X  /*
X   * call sequent undocumented routine to count logins and
X   * add utmp entry if possible
X   */
X  if (add_utmp(slot, &u) == -1)
X#   else /* sequent */
X  (void) lseek(utmpfd, (off_t) (slot * sizeof u), 0);
X  if (write(utmpfd, (char *) &u, sizeof u) != sizeof u)
X#   endif /* sequent */
X#  endif /* GETUTENT */
X# endif /* _SEQUENT_ */
X
X    {
X# ifdef NETHACK
X      if (nethackflag)
X        Msg(errno, "%s is too hard to dig in", UTMPFILE);
X      else
X# endif /* NETHACK */
X      Msg(errno,"Could not write %s", UTMPFILE);
X# ifdef UTNOKEEP
X      close(utmpfd);
X# endif /* UTNOKEEP */
X      return -1;
X    }
X  debug("SetUtmp successful\n");
X  wi->w_slot = slot;
X# ifdef UTNOKEEP
X  close(utmpfd);
X# endif /* UTNOKEEP */
X  return 0;
X}
X
X
X
X/*
X * if slot could be removed or was 0,  wi->w_slot = -1;
X * else not changed.
X */
X
Xint
XRemoveUtmp(wi)
Xstruct win *wi;
X{
X# ifdef GETUTENT
X  struct utmp *uu;
X# endif /* GETUTENT */
X  struct utmp u;
X  slot_t slot;
X
X  slot = wi->w_slot;
X# ifdef GETUTENT
X  debug1("RemoveUtmp(%s)\n", (slot == (slot_t) 0) ?
X         "no slot (0)":((slot == (slot_t) -1) ? "no slot (-1)" : slot));
X# else /* GETUTENT */
X  debug1("RemoveUtmp(wi.slot: %d)\n", slot);
X# endif /* GETUTENT */
X# ifdef UTNOKEEP
X  InitUtmp();
X# endif /* UTNOKEEP */
X  if (!utmpok)
X    return -1;
X  if (slot == (slot_t) 0 || slot == (slot_t) -1)
X    {
X      debug1("There is no utmp-slot to be removed(%d)\n", (int)slot);
X      wi->w_slot = (slot_t) -1;
X      return 0;
X    }
X  bzero((char *) &u, sizeof u);
X# ifdef GETUTENT
X  setutent();
X  strncpy(u.ut_line, slot, sizeof(u.ut_line));
X  if ((uu = getutline(&u)) == 0)
X    {
X      Msg(0, "Utmp slot not found -> not removed");
X      return -1;
X    }
X  bcopy((char *)uu, (char *)&wi->w_savut, sizeof(wi->w_savut));
X#  ifdef _SEQUENT_
X  if (ut_delete_user(slot, uu->ut_pid, 0, 0) == 0)
X#  else /* _SEQUENT_ */
X  u = *uu;
X  u.ut_type = DEAD_PROCESS;
X  u.ut_exit.e_termination = 0;
X  u.ut_exit.e_exit= 0;
X  if (pututline(&u) == 0)
X#  endif /* _SEQUENT_ */
X# else /* GETUTENT */
X  (void) lseek(utmpfd, (off_t) (slot * sizeof(u)), 0);
X  if (read(utmpfd, (char *) &wi->w_savut, sizeof(wi->w_savut)) != sizeof u)
X    {
X      bzero((char *)&wi->w_savut, sizeof(wi->w_savut));
X      Msg(errno, "cannot read %s?", UTMPFILE);
X      sleep(1);
X    }
X  (void) lseek(utmpfd, (off_t) (slot * sizeof(u)), 0);
X#  ifdef UTNOKEEP
X  bcopy((char *)&wi->w_savut, (char *)&u, sizeof(u));
X  bzero(u.ut_name, sizeof(u.ut_name));
X  bzero(u.ut_host, sizeof(u.ut_host));
X#  endif /* UTNOKEEP */
X  if (write(utmpfd, (char *) &u, sizeof(u)) != sizeof(u))
X# endif /* GETUTENT */
X    {
X# ifdef NETHACK
X      if (nethackflag)
X        Msg(errno, "%s is too hard to dig in", UTMPFILE);
X      else
X# endif /* NETHACK */
X      Msg(errno,"Could not write %s", UTMPFILE);
X# ifdef UTNOKEEP
X      close(utmpfd);
X# endif /* UTNOKEEP */
X      return -1;
X    }
X  debug("RemoveUtmp successfull\n");
X  wi->w_slot = (slot_t) -1;
X# ifdef UTNOKEEP
X  close(utmpfd);
X# endif /* UTNOKEEP */
X  return 0;
X}
X
X
X
X/*
X * TtyNameSlot:
X * return an index, where the named tty is found in utmp.
X */
X
Xstatic slot_t
XTtyNameSlot(nam)
Xchar *nam;
X{
X  char *name;
X  register slot_t slot;
X# ifdef UTNOKEEP
X  struct utmp u;
X# else
X#  ifndef GETUTENT
X  register struct ttyent *tp;
X#  endif /* GETUTENT */
X# endif /* UTNOKEEP */
X
X  debug1("TtyNameSlot(%s)\n", nam);
X# ifdef UTNOKEEP
X  InitUtmp();
X# endif /* UTNOKEEP */
X  if (!utmpok || nam == NULL)
X    return (slot_t)0;
X  name = stripdev(nam);
X# ifdef GETUTENT
X  slot = name;
X# else /* GETUTENT */
X#  ifdef UTNOKEEP
X  slot = 0;
X  while ((read(utmpfd, (char *)&u, sizeof(u)) == sizeof(u))
X         && (strcmp(u.ut_line, name)))
X    slot++;
X  close(utmpfd);
X#  else /* UTNOKEEP */
X  slot = 1;
X  setttyent();
X  while ((tp = getttyent()) != NULL && strcmp(name, tp->ty_name) != 0)
X    slot++;
X#  endif /* UTNOKEEP */
X# endif /* GETUTENT */
X  return slot;
X}
X
X
X
X# if !defined(GETTTYENT) && !defined(GETUTENT) && !defined(UTNOKEEP)
X
Xstatic void
Xsetttyent()
X{
X  struct stat s;
X  register int f;
X  register char *p, *ep;
X
X  if (ttnext)
X    {
X      ttnext = tt;
X      return;
X    }
X  if ((f = open(ttys, O_RDONLY)) == -1 || fstat(f, &s) == -1)
X    Panic(errno, ttys);
X  if ((tt = malloc((unsigned) s.st_size + 1)) == 0)
X    Panic(0, strnomem);
X  if (read(f, tt, s.st_size) != s.st_size)
X    Panic(errno, ttys);
X  close(f);
X  for (p = tt, ep = p + s.st_size; p < ep; ++p)
X    if (*p == '\n')
X      *p = '\0';
X  *p = '\0';
X  ttnext = tt;
X}
X
Xstatic struct ttyent *
Xgetttyent()
X{
X  static struct ttyent t;
X
X  if (*ttnext == '\0')
X    return NULL;
X  t.ty_name = ttnext + 2;
X  ttnext += strlen(ttnext) + 1;
X  return &t;
X}
X
X# endif    /* !GETTTYENT && !GETUTENT && !UTNOKEEP */
X
X
X#endif /* UTMPOK */
X
X
X
X/*********************************************************************
X *
X *  getlogin() replacement (for SVR4 machines)
X */
X
X# if defined(BUGGYGETLOGIN)
Xchar *
Xgetlogin()
X{
X  char *tty;
X#ifdef utmp
X# undef utmp
X#endif
X  struct utmp u;
X  static char retbuf[sizeof(u.ut_user)+1];
X  int fd;
X
X  for (fd = 0; fd <= 2 && (tty = ttyname(fd)) == NULL; fd++)
X    ;
X  if ((tty == NULL) || ((fd = open(UTMP_FILE, O_RDONLY)) < 0))
X    return NULL;
X  tty = stripdev(tty);
X  retbuf[0] = '\0';
X  while (read(fd, (char *)&u, sizeof(struct utmp)) == sizeof(struct utmp))
X    {
X      if (!strncmp(tty, u.ut_line, sizeof(u.ut_line)))
X    {
X      strncpy(retbuf, u.ut_user, sizeof(u.ut_user));
X      retbuf[sizeof(u.ut_user)] = '\0';
X      if (u.ut_type == USER_PROCESS)
X        break;
X    }
X    }
X  close(fd);
X
X  return *retbuf ? retbuf : NULL;
X}
X# endif /* BUGGYGETLOGIN */
X
END_OF_FILE
if test 18794 -ne `wc -c <'utmp.c'`; then
    echo shar: \"'utmp.c'\" unpacked with wrong size!
fi
# end of 'utmp.c'
fi
echo shar: End of archive 3 \(of 10\).
cp /dev/null ark3isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 9 10 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 10 archives.
    rm -f ark[1-9]isdone ark[1-9][0-9]isdone
else
    echo You still need to unpack the following archives:
    echo "        " ${MISSING}
fi
##  End of shell archive.
exit 0