/*
 * Copyright (c) 1985, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

/*
 * FTP User Program -- Command Interface.
 */

#include "precomp.h"

#include <fcntl.h>

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1985, 1989 Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)main.c	based on 5.13 (Berkeley) 3/14/89";
#endif /* not lint */

#if defined(sun) && !defined(FD_SET)
typedef int uid_t;
#endif

uid_t	getuid(void);
void	intr(void);
void	lostpeer(void);
char	*getlogin(void);

short	portnum;

char	home[128];
char	*globerr;
int	autologin;



/* Lot's of options... */
/*
 * Options and other state info.
 */
int	trace;			/* trace packets exchanged */
int	hash;			/* print # for each buffer transferred */
//int	sendport;		/* use PORT cmd for each data connection */
int	verbose;		/* print messages coming back from server */
int	connected;		/* connected to server */
int	fromatty;		/* input is from a terminal */
int	interactive;		/* interactively prompt on m* cmds */
int	debug;			/* debugging level */
int	bell;			/* ring bell on cmd completion */
int	doglob;			/* glob local file names */
int	proxy;			/* proxy server connection active */
int	passivemode;
int	proxflag;		/* proxy connection exists */
int	sunique;		/* store files on server with unique name */
int	runique;		/* store local files with unique name */
int	mcase;			/* map upper to lower case for mget names */
int	ntflag;			/* use ntin ntout tables for name translation */
int	mapflag;		/* use mapin mapout templates on file names */
int	code;			/* return/reply code for ftp command */
int	crflag;			/* if 1, strip car. rets. on ascii gets */
char	pasv[64];		/* passive port for proxy data connection */
char	*altarg;		/* argv[1] with no shell-like preprocessing  */
char	ntin[17];		/* input translation table */
char	ntout[17];		/* output translation table */
// #include <sys/param.h>
char	mapin[MAXPATHLEN];	/* input map template */
char	mapout[MAXPATHLEN];	/* output map template */
char	typename[32];		/* name of file transfer type */
int	type;			/* file transfer type */
char	structname[32];		/* name of file transfer structure */
int	stru;			/* file transfer structure */
char	formname[32];		/* name of file transfer format */
int	form;			/* file transfer format */
char	modename[32];		/* name of file transfer mode */
int	mode;			/* file transfer mode */
char	bytename[32];		/* local byte size in ascii */
int	bytesize;		/* local byte size in binary */

jmp_buf	toplevel;		/* non-local goto stuff for cmd scanner */

char	line[200];		/* input line buffer */
char	*stringbase;		/* current scan point in line buffer */
char	argbuf[200];		/* argument storage buffer */
char	*argbase;		/* current storage point in arg buffer */
int	margc;			/* count of arguments on input line */
const char	*margv[20];	/* args parsed from input line */
int	cpend;			/* flag: if != 0, then pending server reply */
int	mflag;			/* flag: if != 0, then active multi command */

int	options;		/* used during socket creation */

int	macnum;			/* number of defined macros */
struct	macel macros[16];
char	macbuf[4096];

/* 
 * Need to start a listen on the data channel 
 * before we send the command, otherwise the 
 * server's connect may fail. 
 */
int sendport = -1;

static const char *slurpstring();


int main(int argc, const char *argv[])
{
	const char *cp;
	int top;
#if 0
	char homedir[MAXPATHLEN];
#endif

        int err;
        WORD wVerReq;

        WSADATA WSAData;
        struct	servent *sp;		/* service spec for tcp/ftp */

	/* Disable output buffering, for the benefit of Emacs.  */
	//setbuf(stdout, NULL);

        _fmode = O_BINARY; // This causes an error somewhere.

        wVerReq = MAKEWORD(1,1);

        err = WSAStartup(wVerReq, &WSAData);
        if (err != 0)
        {
           fprintf(stderr, "Could not initialize Windows socket interface.");
           exit(1);
        }

	sp = getservbyname("ftp", "tcp");
	if (sp == 0) {
		fprintf(stderr, "ftp: ftp/tcp: unknown service\n");
		exit(1);
	}

        portnum = sp->s_port;


	doglob = 1;
	interactive = 1;
	autologin = 1;
	argc--, argv++;
	while (argc > 0 && **argv == '-') {
		for (cp = *argv + 1; *cp; cp++)
			switch (*cp) {

			case 'd':
				options |= SO_DEBUG;
				debug++;
				break;

			case 'v':
				verbose++;
				break;

			case 't':
				trace++;
				break;

			case 'i':
				interactive = 0;
				break;

			case 'n':
				autologin = 0;
				break;

			case 'g':
				doglob = 0;
				break;

			default:
				fprintf(stdout,
				  "ftp: %c: unknown option\n", *cp);
				exit(1);
			}
		argc--, argv++;
	}
//	fromatty = isatty(fileno(stdin));
        fromatty = 1; // Strengthen this test
	/*
	 * Set up defaults for FTP.
	 */
	(void) strcpy(typename, "ascii"), type = TYPE_A;
	(void) strcpy(formname, "non-print"), form = FORM_N;
	(void) strcpy(modename, "stream"), mode = MODE_S;
	(void) strcpy(structname, "file"), stru = STRU_F;
	(void) strcpy(bytename, "8"), bytesize = 8;
	if (fromatty)
		verbose++;
	cpend = 0;           /* no pending replies */
	proxy = 0;	/* proxy not active */
    passivemode = 1; /* passive mode *is* active */
	crflag = 1;    /* strip c.r. on ascii gets */
	/*
	 * Set up the home directory in case we're globbing.
	 */
#if 0
	cp = getlogin();
	if (cp != NULL) {
		pw = getpwnam(cp);
	}
	if (pw == NULL)
		pw = getpwuid(getuid());
	if (pw != NULL) {
		home = homedir;
		(void) strcpy(home, pw->pw_dir);
	}
#endif
	cp = getenv("SystemDrive");
	if (cp != NULL && *cp != 0)
	{
		strcpy(home, cp);
		strcat(home, "/");
	}
	else
	{
		strcpy(home, "C:/");
	}
	if (argc > 0) {
		if (setjmp(toplevel))
			exit(0);
//		(void) signal(SIGINT, intr);
//		(void) signal(SIGPIPE, lostpeer);
		setpeer(argc + 1, argv - 1);
	}
	top = setjmp(toplevel) == 0;
	if (top) {
//		(void) signal(SIGINT, intr);
//		(void) signal(SIGPIPE, lostpeer);
	}
	for (;;) {
		cmdscanner(top);
		top = 1;
	}
}

void intr(void)
{
	longjmp(toplevel, 1);
}

void lostpeer(void)
{
   extern SOCKET cout;
   extern int data;

   if (connected) {
      if (cout) {
         closesocket(cout);
         cout = 0;
      }
      if (data >= 0) {
         (void) shutdown(data, 1+1);
         (void) close(data);
         data = -1;
      }
      connected = 0;
   }
   pswitch(1);
   if (connected) {
      if (cout) {
						closesocket(cout);
         cout = 0;
      }
      connected = 0;
   }
   proxflag = 0;
   pswitch(0);
}

/*char *
tail(char *filename)
{
	register char *s;

	while (*filename) {
		s = rindex(filename, '/');
		if (s == NULL)
			break;
		if (s[1])
			return (s + 1);
		*s = '\0';
	}
	return (filename);
}
*/
/*
 * Command parser.
 */
void cmdscanner(int top)
{
	register struct cmd *c;

	if (!top)
		(void) putchar('\n');
	for (;;) {
		(void) fflush(stdout);
		if (fromatty) {
			printf("ftp> ");
			(void) fflush(stdout);
		}
		if (gets(line) == 0) {
			if (feof(stdin) || ferror(stdin))
				quit(0, NULL);
			break;
		}
		if (line[0] == 0)
			break;
		makeargv();
		if (margc == 0) {
			continue;
		}
		c = getcmd(margv[0]);
		if (c == (struct cmd *)-1) {
			printf("?Ambiguous command\n");
			continue;
		}
		if (c == 0) {
			printf("?Invalid command\n");
			continue;
		}
		if (c->c_conn && !connected) {
			printf ("Not connected.\n");
			continue;
		}
		(*c->c_handler)(margc, margv);
		if (bell && c->c_bell)
			(void) putchar('\007');
		if (c->c_handler != help)
			break;
	}
	(void) fflush(stdout);
//	(void) signal(SIGINT, intr);
//	(void) signal(SIGPIPE, lostpeer);
}

struct cmd *
getcmd(const char *name)
{
	extern struct cmd cmdtab[];
	const char *p, *q;
	struct cmd *c, *found;
	int nmatches, longest;

	longest = 0;
	nmatches = 0;
	found = 0;
	for (c = cmdtab; (p = c->c_name); c++) {
		for (q = name; *q == *p++; q++)
			if (*q == 0)		/* exact match? */
				return (c);
		if (!*q) {			/* the name was a prefix */
			if (q - name > longest) {
				longest = q - name;
				nmatches = 1;
				found = c;
			} else if (q - name == longest)
				nmatches++;
		}
	}
	if (nmatches > 1)
		return ((struct cmd *)-1);
	return (found);
}

/*
 * Slice a string up into argc/argv.
 */

int slrflag;

void makeargv(void)
{
	const char **argp;

	margc = 0;
	argp = margv;
	stringbase = line;		/* scan from first of buffer */
	argbase = argbuf;		/* store from first of buffer */
	slrflag = 0;
	while ((*argp++ = slurpstring()))
		margc++;
}

/*
 * Parse string into argbuf;
 * implemented with FSM to
 * handle quoting and strings
 */
static const char *
slurpstring(void)
{
	int got_one = 0;
	register char *sb = stringbase;
	register char *ap = argbase;
	char *tmp = argbase;		/* will return this if token found */

	if (*sb == '!' || *sb == '$') {	/* recognize ! as a token for shell */
		switch (slrflag) {	/* and $ as token for macro invoke */
			case 0:
				slrflag++;
				stringbase++;
				return ((*sb == '!') ? "!" : "$");
				/* NOTREACHED */
			case 1:
				slrflag++;
				altarg = stringbase;
				break;
			default:
				break;
		}
	}

S0:
	switch (*sb) {

	case '\0':
		goto OUT1;

	case ' ':
	case '\t':
		sb++; goto S0;

	default:
		switch (slrflag) {
			case 0:
				slrflag++;
				break;
			case 1:
				slrflag++;
				altarg = sb;
				break;
			default:
				break;
		}
		goto S1;
	}

S1:
	switch (*sb) {

	case ' ':
	case '\t':
	case '\0':
		goto OUT1;	/* end of token */

	case '\\':
		sb++; goto S2;	/* slurp next character */

	case '"':
		sb++; goto S3;	/* slurp quoted string */

	default:
		*ap++ = *sb++;	/* add character to token */
		got_one = 1;
		goto S1;
	}

S2:
	switch (*sb) {

	case '\0':
		goto OUT1;

	default:
		*ap++ = *sb++;
		got_one = 1;
		goto S1;
	}

S3:
	switch (*sb) {

	case '\0':
		goto OUT1;

	case '"':
		sb++; goto S1;

	default:
		*ap++ = *sb++;
		got_one = 1;
		goto S3;
	}

OUT1:
	if (got_one)
		*ap++ = '\0';
	argbase = ap;			/* update storage pointer */
	stringbase = sb;		/* update scan pointer */
	if (got_one) {
		return(tmp);
	}
	switch (slrflag) {
		case 0:
			slrflag++;
			break;
		case 1:
			slrflag++;
			altarg = (char *) 0;
			break;
		default:
			break;
	}
	return((char *)0);
}

#define HELPINDENT (sizeof ("directory"))

/*
 * Help command.
 * Call each command handler with argc == 0 and argv[0] == name.
 */
void help(int argc, const char *argv[])
{
	extern struct cmd cmdtab[];
	struct cmd *c;

	if (argc == 1) {
		register int i, j, w, k;
		int columns, width = 0, lines;
		extern int NCMDS;

		printf("Commands may be abbreviated.  Commands are:\n\n");
		for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
			int len = strlen(c->c_name);

			if (len > width)
				width = len;
		}
		width = (width + 8) &~ 7;
		columns = 80 / width;
		if (columns == 0)
			columns = 1;
		lines = (NCMDS + columns - 1) / columns;
		for (i = 0; i < lines; i++) {
			for (j = 0; j < columns; j++) {
				c = cmdtab + j * lines + i;
				if (c->c_name && (!proxy || c->c_proxy)) {
					printf("%s", c->c_name);
				}
				else if (c->c_name) {
					for (k=0; k < (int) strlen(c->c_name); k++) {
						(void) putchar(' ');
					}
				}
				if (c + lines >= &cmdtab[NCMDS]) {
					printf("\n");
					break;
				}
				w = strlen(c->c_name);
				while (w < width) {
					w = (w + 8) &~ 7;
					(void) putchar('\t');
				}
			}
		}
		(void) fflush(stdout);
		return;
	}
	while (--argc > 0) {
		const char *arg;
		arg = *++argv;
		c = getcmd(arg);
		if (c == (struct cmd *)-1)
			printf("?Ambiguous help command %s\n", arg);
		else if (c == (struct cmd *)0)
			printf("?Invalid help command %s\n", arg);
		else
			printf("%-*s\t%s\n", (int)HELPINDENT,
				c->c_name, c->c_help);
	}
	(void) fflush(stdout);
}