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main.c revision 1.29 
      1 /*	$NetBSD: main.c,v 1.29 1998/01/18 22:09:42 lukem Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1985, 1989, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) Copyright (c) 1985, 1989, 1993, 1994\n\
     39 	The Regents of the University of California.  All rights reserved.\n");
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 10/9/94";
     45 #else
     46 __RCSID("$NetBSD: main.c,v 1.29 1998/01/18 22:09:42 lukem Exp $");
     47 #endif
     48 #endif /* not lint */
     49 
     50 /*
     51  * FTP User Program -- Command Interface.
     52  */
     53 #include <sys/types.h>
     54 #include <sys/socket.h>
     55 
     56 #include <err.h>
     57 #include <netdb.h>
     58 #include <pwd.h>
     59 #include <stdio.h>
     60 #include <stdlib.h>
     61 #include <string.h>
     62 #include <unistd.h>
     63 
     64 #include "ftp_var.h"
     65 #include "pathnames.h"
     66 
     67 int main __P((int, char **));
     68 
     69 int
     70 main(argc, argv)
     71 	int argc;
     72 	char *argv[];
     73 {
     74 	struct servent *sp;
     75 	int ch, top, rval;
     76 	long port;
     77 	struct passwd *pw = NULL;
     78 	char *cp, *ep, homedir[MAXPATHLEN];
     79 	int dumbterm;
     80 
     81 	sp = getservbyname("ftp", "tcp");
     82 	if (sp == 0)
     83 		ftpport = htons(FTP_PORT);	/* good fallback */
     84 	else
     85 		ftpport = sp->s_port;
     86 	sp = getservbyname("http", "tcp");
     87 	if (sp == 0)
     88 		httpport = htons(HTTP_PORT);	/* good fallback */
     89 	else
     90 		httpport = sp->s_port;
     91 	gateport = 0;
     92 	cp = getenv("FTPSERVERPORT");
     93 	if (cp != NULL) {
     94 		port = strtol(cp, &ep, 10);
     95 		if (port < 1 || port > MAX_IN_PORT_T || *ep != '\0')
     96 			warnx("bad FTPSERVERPORT port number: %s (ignored)",
     97 			    cp);
     98 		else
     99 			gateport = htons(port);
    100 	}
    101 	if (gateport == 0) {
    102 		sp = getservbyname("ftpgate", "tcp");
    103 		if (sp == 0)
    104 			gateport = htons(GATE_PORT);
    105 		else
    106 			gateport = sp->s_port;
    107 	}
    108 	doglob = 1;
    109 	interactive = 1;
    110 	autologin = 1;
    111 	passivemode = 0;
    112 	preserve = 1;
    113 	verbose = 0;
    114 	progress = 0;
    115 	gatemode = 0;
    116 #ifndef SMALL
    117 	editing = 0;
    118 	el = NULL;
    119 	hist = NULL;
    120 #endif
    121 	mark = HASHBYTES;
    122 	marg_sl = sl_init();
    123 	if ((tmpdir = getenv("TMPDIR")) == NULL)
    124 		tmpdir = _PATH_TMP;
    125 
    126 	cp = strrchr(argv[0], '/');
    127 	cp = (cp == NULL) ? argv[0] : cp + 1;
    128 	if (strcmp(cp, "pftp") == 0)
    129 		passivemode = 1;
    130 	else if (strcmp(cp, "gate-ftp") == 0)
    131 		gatemode = 1;
    132 
    133 	gateserver = getenv("FTPSERVER");
    134 	if (gateserver == NULL || *gateserver == '\0')
    135 		gateserver = GATE_SERVER;
    136 	if (gatemode) {
    137 		if (*gateserver == '\0') {
    138 			warnx(
    139 "Neither $FTPSERVER nor GATE_SERVER is defined; disabling gate-ftp");
    140 			gatemode = 0;
    141 		}
    142 	}
    143 
    144 	cp = getenv("TERM");
    145 	if (cp == NULL || strcmp(cp, "dumb") == 0)
    146 		dumbterm = 1;
    147 	else
    148 		dumbterm = 0;
    149 	fromatty = isatty(fileno(stdin));
    150 	if (fromatty) {
    151 		verbose = 1;		/* verbose if from a tty */
    152 #ifndef SMALL
    153 		if (! dumbterm)
    154 			editing = 1;	/* editing mode on if tty is usable */
    155 #endif
    156 	}
    157 #ifndef SMALL
    158 	if (isatty(fileno(stdout)) && !dumbterm)
    159 		progress = 1;		/* progress bar on if tty is usable */
    160 #endif
    161 
    162 	while ((ch = getopt(argc, argv, "adeginpP:tvV")) != -1) {
    163 		switch (ch) {
    164 		case 'a':
    165 			anonftp = 1;
    166 			break;
    167 
    168 		case 'd':
    169 			options |= SO_DEBUG;
    170 			debug++;
    171 			break;
    172 
    173 		case 'e':
    174 #ifndef SMALL
    175 			editing = 0;
    176 #endif
    177 			break;
    178 
    179 		case 'g':
    180 			doglob = 0;
    181 			break;
    182 
    183 		case 'i':
    184 			interactive = 0;
    185 			break;
    186 
    187 		case 'n':
    188 			autologin = 0;
    189 			break;
    190 
    191 		case 'p':
    192 			passivemode = 1;
    193 			break;
    194 
    195 		case 'P':
    196 			port = strtol(optarg, &ep, 10);
    197 			if (port < 1 || port > MAX_IN_PORT_T || *ep != '\0')
    198 				warnx("bad port number: %s (ignored)", optarg);
    199 			else
    200 				ftpport = htons((in_port_t)port);
    201 			break;
    202 
    203 		case 't':
    204 			trace = 1;
    205 			break;
    206 
    207 		case 'v':
    208 			verbose = 1;
    209 			break;
    210 
    211 		case 'V':
    212 			verbose = 0;
    213 			break;
    214 
    215 		default:
    216 			usage();
    217 		}
    218 	}
    219 	argc -= optind;
    220 	argv += optind;
    221 
    222 	cpend = 0;	/* no pending replies */
    223 	proxy = 0;	/* proxy not active */
    224 	crflag = 1;	/* strip c.r. on ascii gets */
    225 	sendport = -1;	/* not using ports */
    226 	/*
    227 	 * Set up the home directory in case we're globbing.
    228 	 */
    229 	cp = getlogin();
    230 	if (cp != NULL) {
    231 		pw = getpwnam(cp);
    232 	}
    233 	if (pw == NULL)
    234 		pw = getpwuid(getuid());
    235 	if (pw != NULL) {
    236 		home = homedir;
    237 		(void)strcpy(home, pw->pw_dir);
    238 	}
    239 
    240 	setttywidth(0);
    241 	(void)signal(SIGWINCH, setttywidth);
    242 
    243 #ifdef __GNUC__			/* XXX: to shut up gcc warnings */
    244 	(void)&argc;
    245 	(void)&argv;
    246 #endif
    247 
    248 	if (argc > 0) {
    249 		if (strchr(argv[0], ':') != NULL) {
    250 			anonftp = 1;	/* Handle "automatic" transfers. */
    251 			rval = auto_fetch(argc, argv);
    252 			if (rval >= 0)		/* -1 == connected and cd-ed */
    253 				exit(rval);
    254 		} else {
    255 			char *xargv[5];
    256 
    257 			if (setjmp(toplevel))
    258 				exit(0);
    259 			(void)signal(SIGINT, (sig_t)intr);
    260 			(void)signal(SIGPIPE, (sig_t)lostpeer);
    261 			xargv[0] = __progname;
    262 			xargv[1] = argv[0];
    263 			xargv[2] = argv[1];
    264 			xargv[3] = argv[2];
    265 			xargv[4] = NULL;
    266 			setpeer(argc+1, xargv);
    267 		}
    268 	}
    269 #ifndef SMALL
    270 	controlediting();
    271 #endif /* !SMALL */
    272 	top = setjmp(toplevel) == 0;
    273 	if (top) {
    274 		(void)signal(SIGINT, (sig_t)intr);
    275 		(void)signal(SIGPIPE, (sig_t)lostpeer);
    276 	}
    277 	for (;;) {
    278 		cmdscanner(top);
    279 		top = 1;
    280 	}
    281 }
    282 
    283 void
    284 intr()
    285 {
    286 
    287 	alarmtimer(0);
    288 	longjmp(toplevel, 1);
    289 }
    290 
    291 void
    292 lostpeer()
    293 {
    294 
    295 	alarmtimer(0);
    296 	if (connected) {
    297 		if (cout != NULL) {
    298 			(void)shutdown(fileno(cout), 1+1);
    299 			(void)fclose(cout);
    300 			cout = NULL;
    301 		}
    302 		if (data >= 0) {
    303 			(void)shutdown(data, 1+1);
    304 			(void)close(data);
    305 			data = -1;
    306 		}
    307 		connected = 0;
    308 	}
    309 	pswitch(1);
    310 	if (connected) {
    311 		if (cout != NULL) {
    312 			(void)shutdown(fileno(cout), 1+1);
    313 			(void)fclose(cout);
    314 			cout = NULL;
    315 		}
    316 		connected = 0;
    317 	}
    318 	proxflag = 0;
    319 	pswitch(0);
    320 }
    321 
    322 /*
    323  * Generate a prompt
    324  */
    325 char *
    326 prompt()
    327 {
    328 	return ("ftp> ");
    329 }
    330 
    331 /*
    332  * Command parser.
    333  */
    334 void
    335 cmdscanner(top)
    336 	int top;
    337 {
    338 	struct cmd *c;
    339 	int num;
    340 
    341 	if (!top
    342 #ifndef SMALL
    343 	    && !editing
    344 #endif /* !SMALL */
    345 	    )
    346 		(void)putchar('\n');
    347 	for (;;) {
    348 #ifndef SMALL
    349 		if (!editing) {
    350 #endif /* !SMALL */
    351 			if (fromatty) {
    352 				fputs(prompt(), stdout);
    353 				(void)fflush(stdout);
    354 			}
    355 			if (fgets(line, sizeof(line), stdin) == NULL)
    356 				quit(0, 0);
    357 			num = strlen(line);
    358 			if (num == 0)
    359 				break;
    360 			if (line[--num] == '\n') {
    361 				if (num == 0)
    362 					break;
    363 				line[num] = '\0';
    364 			} else if (num == sizeof(line) - 2) {
    365 				puts("sorry, input line too long.");
    366 				while ((num = getchar()) != '\n' && num != EOF)
    367 					/* void */;
    368 				break;
    369 			} /* else it was a line without a newline */
    370 #ifndef SMALL
    371 		} else {
    372 			const char *buf;
    373 			HistEvent ev;
    374 			cursor_pos = NULL;
    375 
    376 			if ((buf = el_gets(el, &num)) == NULL || num == 0)
    377 				quit(0, 0);
    378 			if (line[--num] == '\n') {
    379 				if (num == 0)
    380 					break;
    381 			} else if (num >= sizeof(line)) {
    382 				puts("sorry, input line too long.");
    383 				break;
    384 			}
    385 			memcpy(line, buf, num);
    386 			line[num] = '\0';
    387 			history(hist, &ev, H_ENTER, buf);
    388 		}
    389 #endif /* !SMALL */
    390 
    391 		makeargv();
    392 		if (margc == 0)
    393 			continue;
    394 #if 0 && !defined(SMALL)	/* XXX: don't want el_parse */
    395 		/*
    396 		 * el_parse returns -1 to signal that it's not been handled
    397 		 * internally.
    398 		 */
    399 		if (el_parse(el, margc, margv) != -1)
    400 			continue;
    401 #endif /* !SMALL */
    402 		c = getcmd(margv[0]);
    403 		if (c == (struct cmd *)-1) {
    404 			puts("?Ambiguous command.");
    405 			continue;
    406 		}
    407 		if (c == 0) {
    408 			puts("?Invalid command.");
    409 			continue;
    410 		}
    411 		if (c->c_conn && !connected) {
    412 			puts("Not connected.");
    413 			continue;
    414 		}
    415 		confirmrest = 0;
    416 		(*c->c_handler)(margc, margv);
    417 		if (bell && c->c_bell)
    418 			(void)putchar('\007');
    419 		if (c->c_handler != help)
    420 			break;
    421 	}
    422 	(void)signal(SIGINT, (sig_t)intr);
    423 	(void)signal(SIGPIPE, (sig_t)lostpeer);
    424 }
    425 
    426 struct cmd *
    427 getcmd(name)
    428 	const char *name;
    429 {
    430 	const char *p, *q;
    431 	struct cmd *c, *found;
    432 	int nmatches, longest;
    433 
    434 	if (name == NULL)
    435 		return (0);
    436 
    437 	longest = 0;
    438 	nmatches = 0;
    439 	found = 0;
    440 	for (c = cmdtab; (p = c->c_name) != NULL; c++) {
    441 		for (q = name; *q == *p++; q++)
    442 			if (*q == 0)		/* exact match? */
    443 				return (c);
    444 		if (!*q) {			/* the name was a prefix */
    445 			if (q - name > longest) {
    446 				longest = q - name;
    447 				nmatches = 1;
    448 				found = c;
    449 			} else if (q - name == longest)
    450 				nmatches++;
    451 		}
    452 	}
    453 	if (nmatches > 1)
    454 		return ((struct cmd *)-1);
    455 	return (found);
    456 }
    457 
    458 /*
    459  * Slice a string up into argc/argv.
    460  */
    461 
    462 int slrflag;
    463 
    464 void
    465 makeargv()
    466 {
    467 	char *argp;
    468 
    469 	stringbase = line;		/* scan from first of buffer */
    470 	argbase = argbuf;		/* store from first of buffer */
    471 	slrflag = 0;
    472 	marg_sl->sl_cur = 0;		/* reset to start of marg_sl */
    473 	for (margc = 0; ; margc++) {
    474 		argp = slurpstring();
    475 		sl_add(marg_sl, argp);
    476 		if (argp == NULL)
    477 			break;
    478 	}
    479 #ifndef SMALL
    480 	if (cursor_pos == line) {
    481 		cursor_argc = 0;
    482 		cursor_argo = 0;
    483 	} else if (cursor_pos != NULL) {
    484 		cursor_argc = margc;
    485 		cursor_argo = strlen(margv[margc-1]);
    486 	}
    487 #endif /* !SMALL */
    488 }
    489 
    490 #ifdef SMALL
    491 #define INC_CHKCURSOR(x)	(x)++
    492 #else  /* !SMALL */
    493 #define INC_CHKCURSOR(x)	{ (x)++ ; \
    494 				if (x == cursor_pos) { \
    495 					cursor_argc = margc; \
    496 					cursor_argo = ap-argbase; \
    497 					cursor_pos = NULL; \
    498 				} }
    499 
    500 #endif /* !SMALL */
    501 
    502 /*
    503  * Parse string into argbuf;
    504  * implemented with FSM to
    505  * handle quoting and strings
    506  */
    507 char *
    508 slurpstring()
    509 {
    510 	int got_one = 0;
    511 	char *sb = stringbase;
    512 	char *ap = argbase;
    513 	char *tmp = argbase;		/* will return this if token found */
    514 
    515 	if (*sb == '!' || *sb == '$') {	/* recognize ! as a token for shell */
    516 		switch (slrflag) {	/* and $ as token for macro invoke */
    517 			case 0:
    518 				slrflag++;
    519 				INC_CHKCURSOR(stringbase);
    520 				return ((*sb == '!') ? "!" : "$");
    521 				/* NOTREACHED */
    522 			case 1:
    523 				slrflag++;
    524 				altarg = stringbase;
    525 				break;
    526 			default:
    527 				break;
    528 		}
    529 	}
    530 
    531 S0:
    532 	switch (*sb) {
    533 
    534 	case '\0':
    535 		goto OUT;
    536 
    537 	case ' ':
    538 	case '\t':
    539 		INC_CHKCURSOR(sb);
    540 		goto S0;
    541 
    542 	default:
    543 		switch (slrflag) {
    544 			case 0:
    545 				slrflag++;
    546 				break;
    547 			case 1:
    548 				slrflag++;
    549 				altarg = sb;
    550 				break;
    551 			default:
    552 				break;
    553 		}
    554 		goto S1;
    555 	}
    556 
    557 S1:
    558 	switch (*sb) {
    559 
    560 	case ' ':
    561 	case '\t':
    562 	case '\0':
    563 		goto OUT;	/* end of token */
    564 
    565 	case '\\':
    566 		INC_CHKCURSOR(sb);
    567 		goto S2;	/* slurp next character */
    568 
    569 	case '"':
    570 		INC_CHKCURSOR(sb);
    571 		goto S3;	/* slurp quoted string */
    572 
    573 	default:
    574 		*ap = *sb;	/* add character to token */
    575 		ap++;
    576 		INC_CHKCURSOR(sb);
    577 		got_one = 1;
    578 		goto S1;
    579 	}
    580 
    581 S2:
    582 	switch (*sb) {
    583 
    584 	case '\0':
    585 		goto OUT;
    586 
    587 	default:
    588 		*ap = *sb;
    589 		ap++;
    590 		INC_CHKCURSOR(sb);
    591 		got_one = 1;
    592 		goto S1;
    593 	}
    594 
    595 S3:
    596 	switch (*sb) {
    597 
    598 	case '\0':
    599 		goto OUT;
    600 
    601 	case '"':
    602 		INC_CHKCURSOR(sb);
    603 		goto S1;
    604 
    605 	default:
    606 		*ap = *sb;
    607 		ap++;
    608 		INC_CHKCURSOR(sb);
    609 		got_one = 1;
    610 		goto S3;
    611 	}
    612 
    613 OUT:
    614 	if (got_one)
    615 		*ap++ = '\0';
    616 	argbase = ap;			/* update storage pointer */
    617 	stringbase = sb;		/* update scan pointer */
    618 	if (got_one) {
    619 		return (tmp);
    620 	}
    621 	switch (slrflag) {
    622 		case 0:
    623 			slrflag++;
    624 			break;
    625 		case 1:
    626 			slrflag++;
    627 			altarg = NULL;
    628 			break;
    629 		default:
    630 			break;
    631 	}
    632 	return (NULL);
    633 }
    634 
    635 /*
    636  * Help command.
    637  * Call each command handler with argc == 0 and argv[0] == name.
    638  */
    639 void
    640 help(argc, argv)
    641 	int argc;
    642 	char *argv[];
    643 {
    644 	struct cmd *c;
    645 
    646 	if (argc == 1) {
    647 		StringList *buf;
    648 
    649 		buf = sl_init();
    650 		printf("%sommands may be abbreviated.  Commands are:\n\n",
    651 		    proxy ? "Proxy c" : "C");
    652 		for (c = cmdtab; c < &cmdtab[NCMDS]; c++)
    653 			if (c->c_name && (!proxy || c->c_proxy))
    654 				sl_add(buf, c->c_name);
    655 		list_vertical(buf);
    656 		sl_free(buf, 0);
    657 		return;
    658 	}
    659 
    660 #define HELPINDENT ((int) sizeof("disconnect"))
    661 
    662 	while (--argc > 0) {
    663 		char *arg;
    664 
    665 		arg = *++argv;
    666 		c = getcmd(arg);
    667 		if (c == (struct cmd *)-1)
    668 			printf("?Ambiguous help command %s\n", arg);
    669 		else if (c == NULL)
    670 			printf("?Invalid help command %s\n", arg);
    671 		else
    672 			printf("%-*s\t%s\n", HELPINDENT,
    673 				c->c_name, c->c_help);
    674 	}
    675 }
    676 
    677 void
    678 usage()
    679 {
    680 	(void)fprintf(stderr,
    681 	    "usage: %s [-adeginptvV] [host [port]]\n"
    682 	    "       %s host:path[/]\n"
    683 	    "       %s ftp://host[:port]/path[/]\n"
    684 	    "       %s http://host[:port]/file\n",
    685 	    __progname, __progname, __progname, __progname);
    686 	exit(1);
    687 }
    688