/*
 * Copyright (c) 1994-2000 FUJITSU LABORATORIES LIMITED 
 * All rights reserved.
 * 
 * FUJITSU LABORATORIES LIMITED ("FLL") hereby grants you a limited,
 * non-exclusive and royalty-free license to use, copy, modify and
 * redistribute, solely for non-commercial and non-profit purposes, the
 * computer program, "Risa/Asir" ("SOFTWARE"), subject to the terms and
 * conditions of this Agreement. For the avoidance of doubt, you acquire
 * only a limited right to use the SOFTWARE hereunder, and FLL or any
 * third party developer retains all rights, including but not limited to
 * copyrights, in and to the SOFTWARE.
 * 
 * (1) FLL does not grant you a license in any way for commercial
 * purposes. You may use the SOFTWARE only for non-commercial and
 * non-profit purposes only, such as academic, research and internal
 * business use.
 * (2) The SOFTWARE is protected by the Copyright Law of Japan and
 * international copyright treaties. If you make copies of the SOFTWARE,
 * with or without modification, as permitted hereunder, you shall affix
 * to all such copies of the SOFTWARE the above copyright notice.
 * (3) An explicit reference to this SOFTWARE and its copyright owner
 * shall be made on your publication or presentation in any form of the
 * results obtained by use of the SOFTWARE.
 * (4) In the event that you modify the SOFTWARE, you shall notify FLL by
 * e-mail at risa-admin@sec.flab.fujitsu.co.jp of the detailed specification
 * for such modification or the source code of the modified part of the
 * SOFTWARE.
 * 
 * THE SOFTWARE IS PROVIDED AS IS WITHOUT ANY WARRANTY OF ANY KIND. FLL
 * MAKES ABSOLUTELY NO WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY, AND
 * EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF THIRD PARTIES'
 * RIGHTS. NO FLL DEALER, AGENT, EMPLOYEES IS AUTHORIZED TO MAKE ANY
 * MODIFICATIONS, EXTENSIONS, OR ADDITIONS TO THIS WARRANTY.
 * UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, TORT, CONTRACT,
 * OR OTHERWISE, SHALL FLL BE LIABLE TO YOU OR ANY OTHER PERSON FOR ANY
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE OR CONSEQUENTIAL
 * DAMAGES OF ANY CHARACTER, INCLUDING, WITHOUT LIMITATION, DAMAGES
 * ARISING OUT OF OR RELATING TO THE SOFTWARE OR THIS AGREEMENT, DAMAGES
 * FOR LOSS OF GOODWILL, WORK STOPPAGE, OR LOSS OF DATA, OR FOR ANY
 * DAMAGES, EVEN IF FLL SHALL HAVE BEEN INFORMED OF THE POSSIBILITY OF
 * SUCH DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. EVEN IF A PART
 * OF THE SOFTWARE HAS BEEN DEVELOPED BY A THIRD PARTY, THE THIRD PARTY
 * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
 * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
 * $OpenXM: OpenXM_contrib2/asir2018/io/ox_launch.c,v 1.5 2020/10/06 06:31:20 noro Exp $
*/
#include <setjmp.h>
#include <signal.h>
#include <fcntl.h>
#include "ca.h"
#include "com.h"
#include "ox.h"
// #include "gc.h"
#if defined(VISUAL) || defined(__MINGW32__)
#include <stdlib.h>
#include <windows.h>
#include <io.h>
#include <fcntl.h>
#include <process.h>
#else
#include <sys/file.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <pwd.h>
#endif

#if defined(SYSV)
#include <unistd.h>
#endif

#if defined(VISUAL) || defined(__MINGW32__)
HANDLE hIntr,hReset,hKill;
extern int _fileinfo;
#endif

void GC_init();
static void put_log(char *);
static int ox_spawn(char *,int,char *,char *);
static void launch_error(char *);
static void ox_io_init(int);
static void push_one(Obj);
static Obj pop_one();
static void do_cmd(int);
static void terminate_server();

static Obj *asir_OperandStack;
static int asir_OperandStackPtr;

static char hostname[BUFSIZ];
static int sindex;
static struct sockaddr_in peer;
static int cpid;

static void put_log(str)
char *str;
{
  static FILE *logfile;

  if ( !logfile )
#if defined(ANDROID)
    logfile = fopen("/data/data/com.termux/files/usr/tmp/ox_log","w");
#else
    logfile = fopen("/tmp/ox_log","w");
#endif
  fprintf(logfile,"%s\n",str);
  fflush(logfile);
}

/*  
  argv[1] : host to connect
  argv[2] : if 1, call try_bind_listen and try_accept
      if 0, call try_connect
  argv[3] : control_port
  argv[4] : server_port 
  argv[5] : server
  argv[6] : display or "0"
  argv[7] : if exists, it should be "-nolog"
  XXX : argv[7] is used to pass the path of engine.exe in Windows.
*/

void launch_main(argc,argv)
int argc;
char **argv;
{
#if !defined(VISUAL) && !defined(__MINGW32__)
  Obj p;
  char *name;
  char buf[BUFSIZ];
#endif
  int id;
  Obj obj;
  int cs,ss;
  unsigned int cmd;
  int use_unix,accept_client;
  char *control_port_str,*server_port_str;
  char *rhost,*server,*dname,*nolog;
  char *e,*s;

  GC_init(); nglob_init();
  gethostname(hostname,BUFSIZ);
  rhost = argv[1];
  use_unix = !strcmp(rhost,".") ? 1 : 0;
  accept_client = atoi(argv[2]) ? 1 : 0;
  control_port_str = argv[3];
  server_port_str = argv[4];
  server = argv[5];
  dname = argv[6];
  nolog = argc > 7 ? argv[7]: 0;

#if defined(VISUAL) || defined(__MINGW32__)
    init_socket();
#endif

  set_signal(SIGINT,SIG_IGN);
#if defined(SIGHUP)
  set_signal(SIGHUP,SIG_IGN);
#endif
#if defined(SIGUSR1)
  set_signal(SIGUSR1,SIG_IGN);
#endif
#if defined(SIGTERM)
  set_signal(SIGTERM,terminate_server);
#endif

  /* XXX a dirty hack */
  if ( !getenv("LD_LIBRARY_PATH") ) {
    if ( ( e = getenv("OpenXM_HOME") ) != 0 ) {
      s = (char *)alloca(strlen(e)+100);
      sprintf(s,"LD_LIBRARY_PATH=%s/lib",e);
      putenv(s);
    }
  }

  if ( accept_client ) {
    cs = try_bind_listen(use_unix,control_port_str);
    ss = try_bind_listen(use_unix,server_port_str);
    cs = try_accept(use_unix,cs);
    ss = try_accept(use_unix,ss);
  } else {
    cs = try_connect(use_unix,rhost,control_port_str);
    ss = try_connect(use_unix,rhost,server_port_str);
  }
  ox_io_init(cs);
  if ( cs < 0 || ss < 0 )
    launch_error("cannot connect to the client");
  cpid = ox_spawn(server,ss,dname,nolog);

  while ( 1 ) {
    ox_recv(sindex,&id,&obj);
    switch ( id ) {
      case OX_COMMAND:
        cmd = ((USINT)obj)->body;
        do_cmd(cmd);
        break;
      case OX_DATA:
        push_one(obj);
        break;
      case OX_SYNC_BALL:
        break;
      default:
        break;
    }
  }
}

#if defined(VISUAL) || defined(__MINGW32__)
static void do_cmd(cmd)
int cmd;
{
  USINT t;

  switch ( cmd ) {
    case SM_shutdown:
      SetEvent(hKill);
      ExitProcess(0);
      break;
    case SM_control_intr:
      SetEvent(hIntr);
      break;
    case SM_control_kill:
      SetEvent(hKill);
      break;
    case SM_control_reset_connection:
#if 0
      /* XXX obsolete */
      MKUSINT(t,0);
      ox_send_data(sindex,t);
#endif
      SetEvent(hReset);
      break;
    default:
      break;
  }
}
#else
static void do_cmd(cmd)
int cmd;
{
  USINT t;
  int id,cindex;
  int bport,sport;
  int bs,bs0;
  int status;
  STRING prog,dname;

  switch ( cmd ) {
    case SM_shutdown:
      kill(cpid,SIGKILL);
      exit(0); break;
    case SM_control_intr:
      kill(cpid,SIGINT);
      break;
    case SM_control_kill:
      kill(cpid,SIGKILL);
      break;
    case SM_control_reset_connection:
#if 0
      /* XXX obsolete */
      MKUSINT(t,0);
      ox_send_data(sindex,t);
#endif
      kill(cpid,SIGUSR1);
      break;
    default:
      break;
  }
}
#endif

static int ox_spawn(prog,bs,dname,nolog)
char *prog;
int bs;
char *dname;
char *nolog;
{
#if defined(VISUAL) || defined(__MINGW32__)
  char *av[BUFSIZ];
  char sock_id[BUFSIZ],ox_intr[BUFSIZ],ox_reset[BUFSIZ],ox_kill[BUFSIZ];
  char AsirExe[BUFSIZ];
  int hProc;
  STRING rootdir;
  int mypid;
  int newbs;
    
  DuplicateHandle(GetCurrentProcess(),(HANDLE)bs,
          GetCurrentProcess(),(HANDLE *)&newbs,
          0,TRUE,DUPLICATE_SAME_ACCESS);
  closesocket(bs);
  bs = newbs;

  mypid = GetCurrentProcessId();
  sprintf(ox_intr,"ox_intr_%d",mypid);
  sprintf(ox_reset,"ox_reset_%d",mypid);
  sprintf(ox_kill,"ox_kill_%d",mypid);
  hIntr = CreateEvent(NULL,TRUE,FALSE,ox_intr);
  hReset = CreateEvent(NULL,TRUE,FALSE,ox_reset);
  hKill = CreateEvent(NULL,TRUE,FALSE,ox_kill);
  sprintf(sock_id,"%d",bs);
  av[0] = prog;
  av[1] = sock_id;
  av[2] = dname; /* if dname == "1" then a message window is opened */
  av[3] = ox_intr;
  av[4] = ox_reset;
  av[5] = ox_kill;
  av[6] = NULL;
  if ( nolog ) {
    sprintf(AsirExe,"\"%s\"",nolog);
    strcpy(AsirExe,nolog);
  } else {
    Pget_rootdir(&rootdir);
    sprintf(AsirExe,"%s\\bin\\engine.exe",BDY(rootdir));
  }
#if _MSC_VER < 1400
  _fileinfo = 1;
#endif
  hProc = _spawnv(_P_NOWAIT,AsirExe,av);
  return (int)hProc;
#else /* VISUAL */
  int b,s,i;
  struct hostent *hp;
  int pid;
  char wname[BUFSIZ];
  char buf[BUFSIZ];
  char errcode;

  pid = fork();
  if ( pid ) {
    return pid;
  } else {
    setpgid(0,getpid());
    if ( bs != 3 && dup2(bs,3) != 3 )
      exit(1);
    if ( bs != 4 && dup2(bs,4) != 4 )
      exit(1);
    {
#if defined(ANDROID)
#include <sys/resource.h>
      struct rlimit rl;

      getrlimit(RLIMIT_NOFILE,&rl);
      close(0);
      for ( i = 5; i < rl.rlim_cur; i++ )
        close(i);
#elif defined(linux) || defined(__NeXT__) || defined(ultrix) || defined(__CYGWIN__)
#include <sys/param.h>
      close(0);
      for ( i = 5; i < NOFILE; i++ )
        close(i);
#else
#include <sys/resource.h>
      struct rlimit rl;

      getrlimit(RLIMIT_NOFILE,&rl);
      close(0);
      for ( i = 5; i < rl.rlim_cur; i++ )
        close(i);
#endif
    }
    if ( !nolog && !strcmp(dname,"1" ) ) /* XXX: for ssh */
      execl(prog,prog,(char *)0);
    else if ( nolog || !strcmp(dname,"0") ) {
      FILE *null;

      null = fopen("/dev/null","wb");
      dup2(fileno(null),1);
      dup2(fileno(null),2);
      if ( !strcmp(dname,"1") ) {
        /* XXX */
        putenv("DISPLAY=");
        execl(prog,prog,(char *)0);
      } else if ( strcmp(dname,"0") )
        execl(prog,prog,"-display",dname,(char *)0);
      else {
        putenv("DISPLAY=");
        execl(prog,prog,(char *)0);
      }
    } else
      execl(prog,prog,"-display",dname,(char *)0);
    /* On failure */
    errcode = 2;
    write(4,&errcode,1);
    exit(1);
  }
#endif
}

static void launch_error(s)
char *s;
{
  exit(0);
}

#define asir_OperandStackSize BUFSIZ

static void ox_io_init(sock)
int sock;
{
  endian_init();
  /* server mode */
  sindex = get_iofp(sock,0,1);
  asir_OperandStack = (Obj *)CALLOC(asir_OperandStackSize,sizeof(Obj));
  asir_OperandStackPtr = -1;
}

static void push_one(obj)
Obj obj;
{
  if ( asir_OperandStackPtr == asir_OperandStackSize-1 )
    return;
  if ( !obj || OID(obj) != O_VOID )
    asir_OperandStack[++asir_OperandStackPtr] = obj;
}

static Obj pop_one() {
  if ( asir_OperandStackPtr >= 0 ) {
    return asir_OperandStack[asir_OperandStackPtr--];
  } else
    return 0;
}

static void terminate_server(int sig)
{
#if defined(SIGKILL)
  kill(cpid,SIGKILL);
#endif
  exit(0);
}