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/*
 * 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/asir2000/io/ox_launch.c,v 1.23 2010/09/01 08:01:09 noro Exp $ 
*/
#include <setjmp.h>
#include <signal.h>
#include <fcntl.h>
#include "ca.h"
#include "com.h"
#include "ox.h"
#if defined(VISUAL)
#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)
HANDLE hIntr,hReset,hKill;
#endif

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 )
		logfile = fopen("/tmp/ox_log","w");
	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)
	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)
		init_socket();
#endif

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

	/* XXX a dirty hack */
	if ( !getenv("LD_LIBRARY_PATH") ) {
		if ( e = getenv("OpenXM_HOME") ) {
			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)
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:
			MKUSINT(t,0);
			ox_send_data(sindex,t);
			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:
			MKUSINT(t,0);
			ox_send_data(sindex,t);
			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)
	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);
	close(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(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);
}

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

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

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

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