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/* Copyright (c) 1993-2002

 *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)

 *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)

 * Copyright (c) 1987 Oliver Laumann

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2, or (at your option)

 * any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program (see the file COPYING); if not, write to the

 * Free Software Foundation, Inc.,

 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA

 *

 ****************************************************************

 */

#include <stdio.h>

#include <errno.h>

#include <sys/param.h>

/* In strict ANSI mode, HP-UX machines define __hpux but not hpux */

#if defined(__hpux) && !defined(hpux)

# define hpux

#endif

#if defined(__bsdi__) || defined(__386BSD__) || defined(_CX_UX) || defined(hpux) || defined(_IBMR2) || defined(linux)

# include <signal.h>

#endif /* __bsdi__ || __386BSD__ || _CX_UX || hpux || _IBMR2 || linux */

#ifdef ISC

# ifdef ENAMETOOLONG

#  undef ENAMETOOLONG

# endif

# ifdef ENOTEMPTY

#  undef ENOTEMPTY

# endif

# include <sys/bsdtypes.h>

# include <net/errno.h>

#endif

#ifdef sun

# define getpgrp __getpgrp

# define exit __exit

#endif

#ifdef POSIX

# include <unistd.h>

# if defined(__STDC__)

#  include <stdlib.h>

# endif /* __STDC__ */

#endif /* POSIX */

#ifdef sun

# undef getpgrp

# undef exit

#endif /* sun */

#ifndef linux /* all done in <errno.h> */

extern int errno;

#endif /* linux */

#ifndef HAVE_STRERROR

/* No macros, please */

#undef strerror

#endif

#if !defined(SYSV) && !defined(linux)

# ifdef NEWSOS

#  define strlen ___strlen___

#  include <strings.h>

#  undef strlen

# else /* NEWSOS */

#  include <strings.h>

# endif /* NEWSOS */

#else /* SYSV */

# if defined(SVR4) || defined(NEWSOS)

#  define strlen ___strlen___

#  include <string.h>

#  undef strlen

#  if !defined(NEWSOS) && !defined(__hpux)

    extern size_t strlen(const char *);

#  endif

# else /* SVR4 */

#  include <string.h>

# endif /* SVR4 */

#endif /* SYSV */

#ifdef USEVARARGS

# if defined(__STDC__)

#  include <stdarg.h>

#  define VA_LIST(var) va_list var;

#  define VA_DOTS ...

#  define VA_DECL

#  define VA_START(ap, fmt) va_start(ap, fmt)

#  define VA_ARGS(ap) ap

#  define VA_END(ap) va_end(ap)

# else

#  include <varargs.h>

#  define VA_LIST(var) va_list var;

#  define VA_DOTS va_alist

#  define VA_DECL va_dcl

#  define VA_START(ap, fmt) va_start(ap)

#  define VA_ARGS(ap) ap

#  define VA_END(ap) va_end(ap)

# endif

#else

# define VA_LIST(var)

# define VA_DOTS p1, p2, p3, p4, p5, p6

# define VA_DECL unsigned long VA_DOTS;

# define VA_START(ap, fmt)

# define VA_ARGS(ap) VA_DOTS

# define VA_END(ap)

# undef vsnprintf

# define vsnprintf xsnprintf

#endif

#if !defined(sun) && !defined(B43) && !defined(ISC) && !defined(pyr) && !defined(_CX_UX)

# include <time.h>

#endif

#include <sys/time.h>

#ifdef M_UNIX   /* SCO */

# include <sys/stream.h>

# include <sys/ptem.h>

# define ftruncate(fd, s) chsize(fd, s)

#endif

#ifdef SYSV

# define index strchr

# define rindex strrchr

# define bzero(poi,len) memset(poi,0,len)

# define bcmp memcmp

# define killpg(pgrp,sig) kill( -(pgrp), sig)

#endif

#ifndef HAVE_GETCWD

# define getcwd(b,l) getwd(b)

#endif

#ifndef USEBCOPY

# ifdef USEMEMMOVE

#  define bcopy(s,d,len) memmove(d,s,len)

# else

#  ifdef USEMEMCPY

#   define bcopy(s,d,len) memcpy(d,s,len)

#  else

#   define NEED_OWN_BCOPY

#   define bcopy xbcopy

#  endif

# endif

#endif

#ifdef hpux

# define setreuid(ruid, euid) setresuid(ruid, euid, -1)

# define setregid(rgid, egid) setresgid(rgid, egid, -1)

#endif

#if defined(HAVE_SETEUID) || defined(HAVE_SETREUID)

# define USE_SETEUID

#endif

#if !defined(HAVE__EXIT) && !defined(_exit)

#define _exit(x) exit(x)

#endif

#ifndef HAVE_UTIMES

# define utimes utime

#endif

#ifdef BUILTIN_TELNET

# include <netinet/in.h>

# include <arpa/inet.h>

#endif

#if defined(USE_LOCALE) && (!defined(HAVE_SETLOCALE) || !defined(HAVE_STRFTIME))

# undef USE_LOCALE

#endif

/*****************************************************************

 *    terminal handling

 */

#ifdef POSIX

# include <termios.h>

# ifdef hpux

#  include <bsdtty.h>

# endif /* hpux */

# ifdef NCCS

#  define MAXCC NCCS

# else

#  define MAXCC 256

# endif

#else /* POSIX */

# ifdef TERMIO

#  include <termio.h>

#  ifdef NCC

#   define MAXCC NCC

#  else

#   define MAXCC 256

#  endif

#  ifdef CYTERMIO

#   include <cytermio.h>

#  endif

# else /* TERMIO */

#  include <sgtty.h>

# endif /* TERMIO */

#endif /* POSIX */

#ifndef VDISABLE

# ifdef _POSIX_VDISABLE

#  define VDISABLE _POSIX_VDISABLE

# else

#  define VDISABLE 0377

# endif /* _POSIX_VDISABLE */

#endif /* !VDISABLE */

/* on sgi, regardless of the stream head's read mode (RNORM/RMSGN/RMSGD)

 * TIOCPKT mode causes data loss if our buffer is too small (IOSIZE)

 * to hold the whole packet at first read().

 * (Marc Boucher)

 *

 * matthew green:

 * TIOCPKT is broken on dgux 5.4.1 generic AViiON mc88100

 *

 * Joe Traister: On AIX4, programs like irc won't work if screen

 * uses TIOCPKT (select fails to return on pty read).

 */

#if defined(sgi) || defined(DGUX) || defined(_IBMR2)

# undef TIOCPKT

#endif

/* linux ncurses is broken, we have to use our own tputs */

#if defined(linux) && defined(TERMINFO)

# define tputs xtputs

#endif

/* Alexandre Oliva: SVR4 style ptys don't work with osf */

#ifdef __osf__

# undef HAVE_SVR4_PTYS

#endif

/*****************************************************************

 *   utmp handling

 */

#ifdef GETUTENT

  typedef char *slot_t;

#else

  typedef int slot_t;

#endif

#if defined(UTMPOK) || defined(BUGGYGETLOGIN)

# if defined(SVR4) && !defined(DGUX) && !defined(__hpux) && !defined(linux)

#  include <utmpx.h>

#  define UTMPFILE      UTMPX_FILE

#  define utmp          utmpx

#  define getutent      getutxent

#  define getutid       getutxid

#  define getutline     getutxline

#  define pututline     pututxline

#  define setutent      setutxent

#  define endutent      endutxent

#  define ut_time       ut_xtime

# else /* SVR4 */

#  include <utmp.h>

# endif /* SVR4 */

# ifdef apollo

   /*

    * We don't have GETUTENT, so we dig into utmp ourselves.

    * But we save the permanent filedescriptor and

    * open utmp just when we need to.

    * This code supports an unsorted utmp. jw.

    */

#  define UTNOKEEP

# endif /* apollo */

# ifndef UTMPFILE

#  ifdef UTMP_FILE

#   define UTMPFILE     UTMP_FILE

#  else

#   ifdef _PATH_UTMP

#    define UTMPFILE    _PATH_UTMP

#   else

#    define UTMPFILE    "/etc/utmp"

#   endif /* _PATH_UTMP */

#  endif

# endif

#endif /* UTMPOK || BUGGYGETLOGIN */

#if !defined(UTMPOK) && defined(USRLIMIT)

# undef USRLIMIT

#endif

#ifdef LOGOUTOK

# ifndef LOGINDEFAULT

#  define LOGINDEFAULT 0

# endif

#else

# ifdef LOGINDEFAULT

#  undef LOGINDEFAULT

# endif

# define LOGINDEFAULT 1

#endif

/*****************************************************************

 *    file stuff

 */

#ifndef F_OK

#define F_OK 0

#endif

#ifndef X_OK

#define X_OK 1

#endif

#ifndef W_OK

#define W_OK 2

#endif

#ifndef R_OK

#define R_OK 4

#endif

#ifndef S_IFIFO

#define S_IFIFO  0010000

#endif

#ifndef S_IREAD

#define S_IREAD  0000400

#endif

#ifndef S_IWRITE

#define S_IWRITE 0000200

#endif

#ifndef S_IEXEC

#define S_IEXEC  0000100

#endif

#if defined(S_IFIFO) && defined(S_IFMT) && !defined(S_ISFIFO)

#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)

#endif

#if defined(S_IFSOCK) && defined(S_IFMT) && !defined(S_ISSOCK)

#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)

#endif

#if defined(S_IFCHR) && defined(S_IFMT) && !defined(S_ISCHR)

#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)

#endif

#if defined(S_IFDIR) && defined(S_IFMT) && !defined(S_ISDIR)

#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)

#endif

#if defined(S_IFLNK) && defined(S_IFMT) && !defined(S_ISLNK)

#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)

#endif

/*

 * SunOS 4.1.3: `man 2V open' has only one line that mentions O_NOBLOCK:

 *

 *     O_NONBLOCK     Same as O_NDELAY above.

 *

 * on the very same SunOS 4.1.3, I traced the open system call and found

 * that an open("/dev/ttyy08", O_RDWR|O_NONBLOCK|O_NOCTTY) was blocked,

 * whereas open("/dev/ttyy08", O_RDWR|O_NDELAY  |O_NOCTTY) went through.

 *

 * For this simple reason I now favour O_NDELAY. jw. 4.5.95

 */

#if defined(sun) && !defined(SVR4)

# undef O_NONBLOCK

#endif

#if !defined(O_NONBLOCK) && defined(O_NDELAY)

# define O_NONBLOCK O_NDELAY

#endif

#if !defined(FNBLOCK) && defined(FNONBLOCK)

# define FNBLOCK FNONBLOCK

#endif

#if !defined(FNBLOCK) && defined(FNDELAY)

# define FNBLOCK FNDELAY

#endif

#if !defined(FNBLOCK) && defined(O_NONBLOCK)

# define FNBLOCK O_NONBLOCK

#endif

#ifndef POSIX

#undef mkfifo

#define mkfifo(n,m) mknod(n,S_IFIFO|(m),0)

#endif

#if !defined(HAVE_LSTAT) && !defined(lstat)

# define lstat stat

#endif

/*****************************************************************

 *    signal handling

 */

#ifdef SIGVOID

# define SIGRETURN

# define sigret_t void

#else

# define SIGRETURN return 0;

# define sigret_t int

#endif

/* Geeeee, reverse it? */

#if defined(SVR4) || (defined(SYSV) && defined(ISC)) || defined(_AIX) || defined(linux) || defined(ultrix) || defined(__386BSD__) || defined(__bsdi__) || defined(POSIX) || defined(NeXT)

# define SIGHASARG

#endif

#ifdef SIGHASARG

# define SIGPROTOARG   (int)

# define SIGDEFARG     (sigsig) int sigsig;

# define SIGARG        0

#else

# define SIGPROTOARG   (void)

# define SIGDEFARG     ()

# define SIGARG

#endif

#ifndef SIGCHLD

#define SIGCHLD SIGCLD

#endif

#if defined(POSIX) || defined(hpux)

# define signal xsignal

#else

# ifdef USESIGSET

#  define signal sigset

# endif /* USESIGSET */

#endif

/* used in screen.c and attacher.c */

#ifndef NSIG            /* kbeal needs these w/o SYSV */

# define NSIG 32

#endif /* !NSIG */

/*****************************************************************

 *    Wait stuff

 */

#if (!defined(sysV68) && !defined(M_XENIX)) || defined(NeXT) || defined(M_UNIX)

# include <sys/wait.h>

#endif

#ifndef WTERMSIG

# ifndef BSDWAIT /* if wait is NOT a union: */

#  define WTERMSIG(status) (status & 0177)

# else

#  define WTERMSIG(status) status.w_T.w_Termsig 

# endif

#endif

#ifndef WSTOPSIG

# ifndef BSDWAIT /* if wait is NOT a union: */

#  define WSTOPSIG(status) ((status >> 8) & 0377)

# else

#  define WSTOPSIG(status) status.w_S.w_Stopsig 

# endif

#endif

/* NET-2 uses WCOREDUMP */

#if defined(WCOREDUMP) && !defined(WIFCORESIG)

# define WIFCORESIG(status) WCOREDUMP(status)

#endif

#ifndef WIFCORESIG

# ifndef BSDWAIT /* if wait is NOT a union: */

#  define WIFCORESIG(status) (status & 0200)

# else

#  define WIFCORESIG(status) status.w_T.w_Coredump

# endif

#endif

#ifndef WEXITSTATUS

# ifndef BSDWAIT /* if wait is NOT a union: */

#  define WEXITSTATUS(status) ((status >> 8) & 0377)

# else

#  define WEXITSTATUS(status) status.w_T.w_Retcode

# endif

#endif

/*****************************************************************

 *    select stuff

 */

#if defined(M_XENIX) || defined(M_UNIX) || defined(_SEQUENT_)

#include <sys/select.h>         /* for timeval + FD... */

#endif

/*

 * SunOS 3.5 - Tom Schmidt - Micron Semiconductor, Inc - 27-Jul-93

 * tschmidt@vax.micron.com

 */

#ifndef FD_SET

# ifndef SUNOS3

typedef struct fd_set { int fds_bits[1]; } fd_set;

# endif

# define FD_ZERO(fd) ((fd)->fds_bits[0] = 0)

# define FD_SET(b, fd) ((fd)->fds_bits[0] |= 1 << (b))

# define FD_ISSET(b, fd) ((fd)->fds_bits[0] & 1 << (b))

# define FD_SETSIZE 32

#endif

/*****************************************************************

 *    user defineable stuff

 */

#ifndef TERMCAP_BUFSIZE

# define TERMCAP_BUFSIZE 2048

#endif

#ifndef MAXPATHLEN

# define MAXPATHLEN 1024

#endif

/*

 * you may try to vary this value. Use low values if your (VMS) system

 * tends to choke when pasting. Use high values if you want to test

 * how many characters your pty's can buffer.

 */

#define IOSIZE          4096