1 /*
2  * Copyright (c) 2021, 2022 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "compat.h"
18 
19 #include <sys/ioctl.h>
20 #include <sys/types.h>
21 #include <sys/socket.h>
22 #include <sys/stat.h>
23 #include <sys/wait.h>
24 
25 #include <assert.h>
26 #include <errno.h>
27 #include <fcntl.h>
28 #include <inttypes.h>
29 #include <netdb.h>
30 #include <libgen.h>
31 #include <limits.h>
32 #include <signal.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <syslog.h>
37 #include <tls.h>
38 #include <unistd.h>
39 
40 #ifdef HAVE_READLINE
41 #include <readline/readline.h>
42 #include <readline/history.h>
43 #endif
44 
45 #ifndef nitems
46 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
47 #endif
48 
49 #include "kami.h"
50 #include "utils.h"
51 #include "log.h"
52 #include "9pclib.h"
53 
54 #define TMPFSTR		"/tmp/kamiftp.XXXXXXXXXX"
55 #define TMPFSTRLEN	sizeof(TMPFSTR)
56 
57 /* flags */
58 int		 tls;
59 const char	*crtpath;
60 const char	*keypath;
61 
62 /* state */
63 FILE			*fp;
64 struct evbuffer		*buf;
65 struct evbuffer		*dirbuf;
66 uint32_t		 msize;
67 int			 bell;
68 
69 volatile sig_atomic_t	 resized;
70 int			 tty_p;
71 int			 tty_width;
72 int			 xdump;
73 
74 struct progress {
75 	uint64_t	max;
76 	uint64_t	done;
77 };
78 
79 int pwdfid;
80 
81 #define ASSERT_EMPTYBUF() assert(EVBUFFER_LENGTH(buf) == 0)
82 
83 #if !HAVE_READLINE
84 char *
85 readline(const char *prompt)
86 {
87 	char *ch, *line = NULL;
88 	size_t linesize = 0;
89 	ssize_t linelen;
90 
91 	printf("%s", prompt);
92 	fflush(stdout);
93 
94 	linelen = getline(&line, &linesize, stdin);
95 	if (linelen == -1)
96 		return NULL;
97 
98 	if ((ch = strchr(line, '\n')) != NULL)
99 		*ch = '\0';
100 	return line;
101 }
102 
103 void
104 add_history(const char *line)
105 {
106 	return;
107 }
108 #endif
109 
110 static char *
111 read_line(const char *prompt)
112 {
113 	char *line;
114 
115 again:
116 	if ((line = readline(prompt)) == NULL)
117 		return NULL;
118 	/* XXX: trim spaces? */
119 	if (*line == '\0') {
120 		free(line);
121 		goto again;
122 	}
123 
124 	add_history(line);
125 	return line;
126 }
127 
128 static void
129 spawn(const char *argv0, ...)
130 {
131 	pid_t pid;
132 	size_t i;
133 	int status;
134 	const char *argv[16], *last;
135 	va_list ap;
136 
137 	memset(argv, 0, sizeof(argv));
138 
139 	va_start(ap, argv0);
140 	argv[0] = argv0;
141 	for (i = 1; i < nitems(argv); ++i) {
142 		last = va_arg(ap, const char *);
143 		if (last == NULL)
144 			break;
145 		argv[i] = last;
146 	}
147 	va_end(ap);
148 
149 	assert(last == NULL);
150 
151 	switch (pid = fork()) {
152 	case -1:
153 		err(1, "fork");
154 	case 0: /* child */
155 		execvp(argv[0], (char *const *)argv);
156 		err(1, "execvp");
157 	default:
158 		waitpid(pid, &status, 0);
159 	}
160 }
161 
162 static int
163 stdio_tls_write(void *arg, const char *buf, int len)
164 {
165 	struct tls	*ctx = arg;
166 	ssize_t		 ret;
167 
168 	do {
169 		ret = tls_write(ctx, buf, len);
170 	} while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT);
171 
172 	if (ret == -1)
173 		warn("tls_write: %s", tls_error(ctx));
174 
175 	return ret;
176 }
177 
178 static int
179 stdio_tls_read(void *arg, char *buf, int len)
180 {
181 	struct tls	*ctx = arg;
182 	ssize_t		 ret;
183 
184 	do {
185 		ret = tls_read(ctx, buf, len);
186 	} while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT);
187 
188 	if (ret == -1)
189 		warn("tls_read: %s", tls_error(ctx));
190 
191 	return ret;
192 }
193 
194 static int
195 stdio_tls_close(void *arg)
196 {
197 	struct tls	*ctx = arg;
198 	int		 ret;
199 
200 	do {
201 		ret = tls_close(ctx);
202 	} while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT);
203 
204 	return ret;
205 }
206 
207 static void
208 tty_resized(int signo)
209 {
210 	resized = 1;
211 }
212 
213 static void __dead
214 usage(int ret)
215 {
216 	fprintf(stderr, "usage: %s [-C cert] [-K key] [-o output] "
217 	    "[user@]host[:port][/path]\n", getprogname());
218 	fprintf(stderr, "kamid suite version " KAMID_VERSION "\n");
219 	exit(ret);
220 }
221 
222 static int
223 nextfid(void)
224 {
225 	uint32_t i;
226 
227 	for (i = 0; ; ++i) {
228 		if (i != pwdfid)
229 			return i;
230 	}
231 }
232 
233 static void
234 do_send(void)
235 {
236 	size_t		 r;
237 
238 	if (xdump)
239 		hexdump("outgoing message", EVBUFFER_DATA(evb),
240 		    EVBUFFER_LENGTH(evb));
241 
242 	while (EVBUFFER_LENGTH(evb) != 0) {
243 		r = fwrite(EVBUFFER_DATA(evb), 1, EVBUFFER_LENGTH(evb), fp);
244 		if (r == 0)
245 			fatalx("unexpected EOF");
246 		evbuffer_drain(evb, r);
247 	}
248 }
249 
250 static void
251 mustread(void *d, size_t len)
252 {
253 	size_t r;
254 
255 	r = fread(d, 1, len, fp);
256 	if (r != len)
257 		errx(1, "unexpected EOF");
258 }
259 
260 static void
261 recv_msg(void)
262 {
263 	size_t		r;
264 	uint32_t	len, l;
265 	char		tmp[BUFSIZ];
266 
267 	r = fread(&len, 1, sizeof(len), fp);
268 	if (r != sizeof(len))
269 		errx(1, "unexpected EOF");
270 
271 	len = le32toh(len);
272 	if (len < HEADERSIZE)
273 		errx(1, "read message of invalid length %d", len);
274 
275 	len -= 4; /* skip the length just read */
276 
277 	while (len != 0) {
278 		l = MIN(len, sizeof(tmp));
279 
280 		r = fread(tmp, 1, l, fp);
281 		if (r != l)
282 			errx(1, "unexpected EOF");
283 		len -= r;
284 		evbuffer_add(buf, tmp, r);
285 	}
286 
287 	if (xdump)
288 		hexdump("incoming packet", EVBUFFER_DATA(buf),
289 		    EVBUFFER_LENGTH(buf));
290 }
291 
292 static uint64_t
293 np_read64(struct evbuffer *buf)
294 {
295 	uint64_t n;
296 
297 	evbuffer_remove(buf, &n, sizeof(n));
298 	return le64toh(n);
299 }
300 
301 static uint32_t
302 np_read32(struct evbuffer *buf)
303 {
304 	uint32_t n;
305 
306 	evbuffer_remove(buf, &n, sizeof(n));
307 	return le32toh(n);
308 }
309 
310 static uint16_t
311 np_read16(struct evbuffer *buf)
312 {
313 	uint16_t n;
314 
315 	evbuffer_remove(buf, &n, sizeof(n));
316 	return le16toh(n);
317 }
318 
319 static uint16_t
320 np_read8(struct evbuffer *buf)
321 {
322 	uint8_t n;
323 
324 	evbuffer_remove(buf, &n, sizeof(n));
325 	return n;
326 }
327 
328 static char *
329 np_readstr(struct evbuffer *buf)
330 {
331 	uint16_t	 len;
332 	char		*str;
333 
334 	len = np_read16(buf);
335 	assert(EVBUFFER_LENGTH(buf) >= len);
336 
337 	if ((str = calloc(1, len+1)) == NULL)
338 		err(1, "calloc");
339 	evbuffer_remove(buf, str, len);
340 	return str;
341 }
342 
343 static void
344 np_read_qid(struct evbuffer *buf, struct qid *qid)
345 {
346 	assert(EVBUFFER_LENGTH(buf) >= QIDSIZE);
347 
348 	qid->type = np_read8(buf);
349 	qid->vers = np_read32(buf);
350 	qid->path = np_read64(buf);
351 }
352 
353 static int
354 np_read_stat(struct evbuffer *buf, struct np_stat *st)
355 {
356 	uint16_t size;
357 
358 	memset(st, 0, sizeof(*st));
359 
360 	size = np_read16(buf);
361 	if (size > EVBUFFER_LENGTH(buf))
362 		return -1;
363 
364 	st->type = np_read16(buf);
365 	st->dev = np_read32(buf);
366 	np_read_qid(buf, &st->qid);
367 	st->mode = np_read32(buf);
368 	st->atime = np_read32(buf);
369 	st->mtime = np_read32(buf);
370 	st->length = np_read64(buf);
371 	st->name = np_readstr(buf);
372 	st->uid = np_readstr(buf);
373 	st->gid = np_readstr(buf);
374 	st->muid = np_readstr(buf);
375 
376 	return 0;
377 }
378 
379 static void
380 expect(uint8_t type)
381 {
382 	uint8_t t;
383 
384 	t = np_read8(buf);
385 	if (t == type)
386 		return;
387 
388 	if (t == Rerror) {
389 		char *err;
390 
391 		/* skip tag */
392 		np_read16(buf);
393 
394 		err = np_readstr(buf);
395 		errx(1, "expected %s, got error %s",
396 		    pp_msg_type(type), err);
397 	}
398 
399 	errx(1, "expected %s, got msg type %s",
400 	    pp_msg_type(type), pp_msg_type(t));
401 }
402 
403 static void
404 expect2(uint8_t type, uint16_t tag)
405 {
406 	uint16_t t;
407 
408 	expect(type);
409 
410 	t = np_read16(buf);
411 	if (t == tag)
412 		return;
413 
414 	errx(1, "expected tag 0x%x, got 0x%x", tag, t);
415 }
416 
417 static char *
418 check(uint8_t type, uint16_t tag)
419 {
420 	uint16_t rtag;
421 	uint8_t rtype;
422 
423 	rtype = np_read8(buf);
424 	rtag = np_read16(buf);
425 	if (rtype == type) {
426 		if (rtag != tag)
427 			errx(1, "expected tag 0x%x, got 0x%x", tag, rtag);
428 		return NULL;
429 	}
430 
431 	if (rtype == Rerror)
432 		return np_readstr(buf);
433 
434 	errx(1, "expected %s, got msg type %s",
435 	    pp_msg_type(type), pp_msg_type(rtype));
436 }
437 
438 static void
439 do_version(void)
440 {
441 	char		*version;
442 
443 	tversion(VERSION9P, MSIZE9P);
444 	do_send();
445 	recv_msg();
446 	expect2(Rversion, NOTAG);
447 
448 	msize = np_read32(buf);
449 	version = np_readstr(buf);
450 
451 	if (msize > MSIZE9P || msize < 256)
452 		errx(1, "got unexpected msize: %d", msize);
453 	if (strcmp(version, VERSION9P))
454 		errx(1, "unexpected 9p version: %s", version);
455 
456 	free(version);
457 	ASSERT_EMPTYBUF();
458 }
459 
460 static void
461 do_attach(const char *user)
462 {
463 	struct qid qid;
464 
465 	tattach(pwdfid, NOFID, user, "/");
466 	do_send();
467 	recv_msg();
468 	expect2(Rattach, iota_tag);
469 	np_read_qid(buf, &qid);
470 
471 	ASSERT_EMPTYBUF();
472 }
473 
474 static uint32_t
475 do_open(uint32_t fid, uint8_t mode)
476 {
477 	struct qid qid;
478 	uint32_t iounit;
479 
480 	topen(fid, mode);
481 	do_send();
482 	recv_msg();
483 	expect2(Ropen, iota_tag);
484 
485 	np_read_qid(buf, &qid);
486 	iounit = np_read32(buf);
487 
488 	ASSERT_EMPTYBUF();
489 
490 	return iounit;
491 }
492 
493 static uint32_t
494 do_create(uint32_t fid, const char *name, uint32_t perm, uint8_t mode)
495 {
496 	struct qid qid;
497 	uint32_t iounit;
498 
499 	tcreate(fid, name, perm, mode);
500 	do_send();
501 	recv_msg();
502 	expect2(Rcreate, iota_tag);
503 
504 	np_read_qid(buf, &qid);
505 	iounit = np_read32(buf);
506 
507 	ASSERT_EMPTYBUF();
508 
509 	return iounit;
510 }
511 
512 static void
513 do_clunk(uint32_t fid)
514 {
515 	tclunk(fid);
516 	do_send();
517 	recv_msg();
518 	expect2(Rclunk, iota_tag);
519 
520 	ASSERT_EMPTYBUF();
521 }
522 
523 static char *
524 dup_fid(int fid, int nfid)
525 {
526 	uint16_t nwqid;
527 	char *errstr;
528 
529 	twalk(fid, nfid, NULL, 0);
530 	do_send();
531 	recv_msg();
532 
533 	if ((errstr = check(Rwalk, iota_tag)) != NULL)
534 		return errstr;
535 
536 	nwqid = np_read16(buf);
537 	assert(nwqid == 0);
538 
539 	ASSERT_EMPTYBUF();
540 
541 	return NULL;
542 }
543 
544 static char *
545 walk_path(int fid, int newfid, const char *path, int *missing,
546     struct qid *qid)
547 {
548 	char *wnames[MAXWELEM], *p, *t, *errstr;
549 	size_t nwname, i;
550 	uint16_t nwqid;
551 
552 	if ((p = strdup(path)) == NULL)
553 		err(1, "strdup");
554 	t = p;
555 
556 	/* strip initial ./ */
557 	if (t[0] == '.' && t[1] == '/')
558 		t += 2;
559 
560 	for (nwname = 0; nwname < nitems(wnames) &&
561 	    (wnames[nwname] = strsep(&t, "/")) != NULL;) {
562 		if (*wnames[nwname] != '\0')
563 			nwname++;
564 	}
565 
566 	twalk(fid, newfid, (const char **)wnames, nwname);
567 	do_send();
568 	recv_msg();
569 
570 	*missing = nwname;
571 	if ((errstr = check(Rwalk, iota_tag)) != NULL) {
572 		free(p);
573 		return errstr;
574 	}
575 
576 	nwqid = np_read16(buf);
577 	assert(nwqid <= nwname);
578 
579 	/* consume all qids */
580 	for (i = 0; i < nwqid; ++i)
581 		np_read_qid(buf, qid);
582 
583 	free(p);
584 
585 	*missing = nwname - nwqid;
586 	return NULL;
587 }
588 
589 static void
590 do_stat(int fid, struct np_stat *st)
591 {
592 	tstat(fid);
593 	do_send();
594 	recv_msg();
595 	expect2(Rstat, iota_tag);
596 
597 	/* eat up the first two byte length */
598 	np_read16(buf);
599 
600 	if (np_read_stat(buf, st) == -1)
601 		errx(1, "invalid stat struct read");
602 
603 	ASSERT_EMPTYBUF();
604 }
605 
606 static char *
607 do_wstat(int fid, const struct np_stat *st)
608 {
609 	char *errstr;
610 
611 	twstat(fid, st);
612 	do_send();
613 	recv_msg();
614 
615 	if ((errstr = check(Rwstat, iota_tag)) != NULL)
616 		return errstr;
617 
618 	ASSERT_EMPTYBUF();
619 
620 	return NULL;
621 }
622 
623 static size_t
624 do_read(int fid, uint64_t off, uint32_t count, void *data)
625 {
626 	uint32_t r;
627 
628 	tread(fid, off, count);
629 	do_send();
630 	recv_msg();
631 	expect2(Rread, iota_tag);
632 
633 	r = np_read32(buf);
634 	assert(r == EVBUFFER_LENGTH(buf));
635 	assert(r <= count);
636 	evbuffer_remove(buf, data, r);
637 
638 	ASSERT_EMPTYBUF();
639 
640 	return r;
641 }
642 
643 static size_t
644 do_write(int fid, uint64_t off, uint32_t count, void *data)
645 {
646 	uint32_t r;
647 
648 	twrite(fid, off, data, count);
649 	do_send();
650 	recv_msg();
651 	expect2(Rwrite, iota_tag);
652 
653 	r = np_read32(buf);
654 	assert(r <= count);
655 
656 	ASSERT_EMPTYBUF();
657 
658 	return r;
659 }
660 
661 static void
662 draw_progress(const char *pre, const struct progress *p)
663 {
664 	struct winsize ws;
665 	int i, l, w;
666 	double perc;
667 
668 	if (xdump)
669 		return;
670 
671 	perc = 100.0 * p->done / p->max;
672 	if (!tty_p) {
673 		fprintf(stderr, "%s: %d%%\n", pre, (int)perc);
674 		return;
675 	}
676 
677 	if (resized) {
678 		resized = 0;
679 
680 		if (ioctl(0, TIOCGWINSZ, &ws) == -1)
681 			return;
682 		tty_width = ws.ws_col;
683 	}
684 	w = tty_width;
685 
686 	if (pre == NULL ||
687 	    ((l = fprintf(stderr, "\r%s ", pre)) == -1 || l >= w))
688 		return;
689 
690 	w -= l + 2 + 5; /* 2 for |, 5 for percentage + \n */
691 	if (w < 0) {
692 		fprintf(stderr, "%4d%%\n", (int)perc);
693 		return;
694 	}
695 
696 	fprintf(stderr, "|");
697 
698 	l = w * MIN(100.0, perc) / 100.0;
699 	for (i = 0; i < l; i++)
700 		fprintf(stderr, "*");
701 	for (; i < w; i++)
702 		fprintf(stderr, " ");
703 	fprintf(stderr, "|%4d%%", (int)perc);
704 }
705 
706 static int
707 fetch_fid(int fid, int fd, const char *name)
708 {
709 	static char buf[MSIZE9P];
710 	struct progress p = {0};
711 	struct np_stat st;
712 	size_t r;
713 	int ret = 0;
714 
715 	do_stat(fid, &st);
716 	do_open(fid, KOREAD);
717 
718 	p.max = st.length;
719 	for (;;) {
720 		size_t len, off;
721 		ssize_t nw;
722 
723 		len = MIN(sizeof(buf), msize);
724 		len -= IOHDRSZ; /* for the request' fields */
725 
726 		r = do_read(fid, p.done, len, buf);
727 		if (r == 0)
728 			break;
729 
730 		for (off = 0; off < r; off += nw)
731 			if ((nw = write(fd, buf + off, r - off)) == 0 ||
732 			    nw == -1) {
733 				ret = -1;
734 				goto end;
735 			}
736 
737 		p.done += r;
738 		draw_progress(name, &p);
739 
740 #if 0
741 		/* throttle, for debugging purpose */
742 		{
743 			struct timespec ts = { 0, 500000000 };
744 			nanosleep(&ts, NULL);
745 		}
746 #endif
747 	}
748 
749 end:
750 	putchar('\n');
751 
752 	do_clunk(fid);
753 	return ret;
754 }
755 
756 static void
757 send_fid(int fid, const char *fnam, int open_flags, int fd, const char *name)
758 {
759 	static char buf[MSIZE9P];
760 	struct progress p = {0};
761 	struct stat sb;
762 	ssize_t r;
763 	size_t w, len;
764 
765 	if (fstat(fd, &sb) == -1)
766 		err(1, "fstat");
767 
768 	if (fnam != NULL)
769 		do_create(fid, fnam, 0644, KOWRITE);
770 	else
771 		do_open(fid, open_flags | KOWRITE);
772 
773 	p.max = sb.st_size;
774 	for (;;) {
775 		len = MIN(sizeof(buf), msize);
776 		len -= HEADERSIZE + 4 + 4 + 8; /* for the request' fields */
777 
778 		r = read(fd, buf, len);
779 		if (r == 0)
780 			break;
781 		if (r == -1)
782 			err(1, "read");
783 
784 		w = do_write(fid, p.done, r, buf);
785 		p.done += w;
786 
787 		draw_progress(name, &p);
788 
789 #if 0
790 		/* throttle, for debugging purpose */
791 		{
792 			struct timespec ts = { 0, 500000000 };
793 			nanosleep(&ts, NULL);
794 		}
795 #endif
796 	}
797 
798 	putchar('\n');
799 	do_clunk(fid);
800 }
801 
802 static int
803 woc_file(int fd, const char *prompt, const char *path)
804 {
805 	struct qid qid;
806 	const char *n = NULL;
807 	char *errstr;
808 	int nfid, miss;
809 
810 	nfid = nextfid();
811 	errstr = walk_path(pwdfid, nfid, path, &miss, &qid);
812 	if (errstr != NULL && miss > 1) {
813 		fprintf(stderr, "%s: %s\n", path, errstr);
814 		free(errstr);
815 		return -1;
816 	}
817 
818 	if (errstr != NULL || miss == 1) {
819 		char p[PATH_MAX], *dn;
820 
821 		/*
822 		 * If it's only one component missing (the file name), walk
823 		 * to the parent directory and try to create the file.
824 		 */
825 
826 		if (strlcpy(p, path, sizeof(p)) >= sizeof(p)) {
827 			fprintf(stderr, "path too long: %s\n", path);
828 			return -1;
829 		}
830 		dn = dirname(p);
831 
832 		if (!strcmp(dn, ".")) {
833 			errstr = dup_fid(pwdfid, nfid);
834 			miss = 0;
835 		} else
836 			errstr = walk_path(pwdfid, nfid, dn, &miss, &qid);
837 
838 		if (errstr != NULL) {
839 			fprintf(stderr, "%s: %s\n", dn, errstr);
840 			free(errstr);
841 			return -1;
842 		}
843 
844 		if (miss != 0) {
845 			fprintf(stderr, "%s: not a directory\n", dn);
846 			return -1;
847 		}
848 
849 		if ((n = strrchr(path, '/')) != NULL)
850 			n++;
851 		else
852 			n = path;
853 	}
854 
855 	free(errstr);
856 
857 	if (miss > 1) {
858 		fprintf(stderr, "can't create %s: missing %d path"
859 		    " component(s)\n", path, miss);
860 		return -1;
861 	}
862 
863 	send_fid(nfid, n, KOTRUNC, fd, prompt);
864 	return 0;
865 }
866 
867 static int
868 dial(const char *host, const char *port)
869 {
870 	struct addrinfo hints, *res, *res0;
871 	int sock, error, saved_errno;
872 	const char *cause = NULL;
873 
874 	memset(&hints, 0, sizeof(hints));
875 	hints.ai_family = AF_UNSPEC;
876 	hints.ai_socktype = SOCK_STREAM;
877 	error = getaddrinfo(host, port, &hints, &res0);
878 	if (error)
879 		errx(1, "%s", gai_strerror(error));
880 
881 	sock = -1;
882 	for (res = res0; res != NULL; res = res->ai_next) {
883 		sock = socket(res->ai_family, res->ai_socktype|SOCK_CLOEXEC,
884 		    res->ai_protocol);
885 		if (sock == -1) {
886 			cause = "socket";
887 			continue;
888 		}
889 
890 		if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
891 			cause = "connect";
892 			saved_errno = errno;
893 			close(sock);
894 			errno = saved_errno;
895 			sock = -1;
896 			continue;
897 		}
898 
899 		break;
900 	}
901 	freeaddrinfo(res0);
902 	if (sock == -1)
903 		err(1, "%s", cause);
904 	return sock;
905 }
906 
907 static void
908 do_connect(const char *host, const char *port, const char *user)
909 {
910 	struct qid qid;
911 	int nfid, miss, fd;
912 	char *errstr;
913 
914 	fprintf(stderr, "connecting to %s:%s...", host, port);
915 
916 	if (tls) {
917 		struct tls_config	*conf;
918 		struct tls		*ctx;
919 		int			 r;
920 
921 		if ((conf = tls_config_new()) == NULL)
922 			fatalx("failed to create TLS config");
923 		tls_config_insecure_noverifycert(conf);
924 		tls_config_insecure_noverifyname(conf);
925 
926 		if (keypath == NULL)
927 			keypath = crtpath;
928 
929 		if (tls_config_set_keypair_file(conf, crtpath, keypath) == -1)
930 			fatalx("failed to load certs: (%s, %s)", crtpath,
931 			    keypath);
932 
933 		if ((ctx = tls_client()) == NULL)
934 			fatalx("failed to create TLS client");
935 		if (tls_configure(ctx, conf) == -1)
936 			fatalx("failed to configure TLS client");
937 		tls_config_free(conf);
938 
939 		if (tls_connect(ctx, host, port) == -1)
940 			fatalx("failed to connect to %s:%s: %s", host, port,
941 			    tls_error(ctx));
942 
943 		do {
944 			r = tls_handshake(ctx);
945 		} while (r == TLS_WANT_POLLIN || r == TLS_WANT_POLLOUT);
946 		fp = funopen(ctx, stdio_tls_read, stdio_tls_write, NULL,
947 		    stdio_tls_close);
948 		if (fp == NULL)
949 			fatal("funopen");
950 	} else {
951 		int fd;
952 
953 		fd = dial(host, port);
954 		if ((fp = fdopen(fd, "r+")) == NULL)
955 			fatal("fdopen");
956 	}
957 
958 	fprintf(stderr, " done!\n");
959 
960 	do_version();
961 	do_attach(user);
962 }
963 
964 static int
965 tmp_file(char sfn[TMPFSTRLEN])
966 {
967 	int tmpfd;
968 
969 	strlcpy(sfn, TMPFSTR, TMPFSTRLEN);
970 	if ((tmpfd = mkstemp(sfn)) == -1) {
971 		warn("mkstemp %s", sfn);
972 		return -1;
973 	}
974 
975 	/* set the close-on-exec flag */
976 	if (fcntl(tmpfd, F_SETFD, FD_CLOEXEC) == -1) {
977 		warn("fcntl");
978 		close(tmpfd);
979 		return -1;
980 	}
981 
982 	return tmpfd;
983 }
984 
985 static inline const char *
986 pp_perm(uint8_t x)
987 {
988 	switch (x & 0x7) {
989 	case 0x0:
990 		return "---";
991 	case 0x1:
992 		return "--x";
993 	case 0x2:
994 		return "-w-";
995 	case 0x3:
996 		return "-wx";
997 	case 0x4:
998 		return "r--";
999 	case 0x5:
1000 		return "r-x";
1001 	case 0x6:
1002 		return "rw-";
1003 	case 0x7:
1004 		return "rwx";
1005 	default:
1006 		/* unreachable, just for the compiler' happiness */
1007 		return "???";
1008 	}
1009 }
1010 
1011 static inline void
1012 prepare_wstat(struct np_stat *st)
1013 {
1014 	memset(st, 0xFF, sizeof(*st));
1015 	st->name = NULL;
1016 	st->uid = NULL;
1017 	st->gid = NULL;
1018 	st->muid = NULL;
1019 }
1020 
1021 static void
1022 cmd_bell(int argc, const char **argv)
1023 {
1024 	if (argc == 0) {
1025 		bell = !bell;
1026 		if (bell)
1027 			puts("bell mode enabled");
1028 		else
1029 			puts("bell mode disabled");
1030 		return;
1031 	}
1032 
1033 	if (argc != 1)
1034 		goto usage;
1035 
1036 	if (!strcmp(*argv, "on")) {
1037 		bell = 1;
1038 		puts("bell mode enabled");
1039 		return;
1040 	}
1041 
1042 	if (!strcmp(*argv, "off")) {
1043 		bell = 0;
1044 		puts("bell mode disabled");
1045 		return;
1046 	}
1047 
1048 usage:
1049 	printf("bell [on | off]\n");
1050 }
1051 
1052 static void
1053 cmd_bye(int argc, const char **argv)
1054 {
1055 	log_warnx("bye\n");
1056 	fclose(fp);
1057 	exit(0);
1058 }
1059 
1060 static void
1061 cmd_cd(int argc, const char **argv)
1062 {
1063 	struct qid qid;
1064 	int nfid, miss;
1065 	char *errstr;
1066 
1067 	if (argc != 1) {
1068 		printf("usage: cd remote-path\n");
1069 		return;
1070 	}
1071 
1072 	nfid = nextfid();
1073 	errstr = walk_path(pwdfid, nfid, argv[0], &miss, &qid);
1074 	if (errstr != NULL) {
1075 		printf("%s: %s\n", argv[0], errstr);
1076 		free(errstr);
1077 		return;
1078 	}
1079 
1080 	if (miss != 0 || !(qid.type & QTDIR)) {
1081 		printf("%s: not a directory\n", argv[0]);
1082 		if (miss == 0)
1083 			do_clunk(nfid);
1084 		return;
1085 	}
1086 
1087 	do_clunk(pwdfid);
1088 	pwdfid = nfid;
1089 }
1090 
1091 static void
1092 cmd_edit(int argc, const char **argv)
1093 {
1094 	struct qid qid;
1095 	int nfid, tmpfd, miss;
1096 	char sfn[TMPFSTRLEN], p[PATH_MAX], *name, *errstr;
1097 	const char *ed;
1098 
1099 	if (argc != 1) {
1100 		puts("usage: edit file");
1101 		return;
1102 	}
1103 
1104 	if ((ed = getenv("VISUAL")) == NULL &&
1105 	    (ed = getenv("EDITOR")) == NULL)
1106 		ed = "ed";
1107 
1108 	nfid = nextfid();
1109 	errstr = walk_path(pwdfid, nfid, *argv, &miss, &qid);
1110 	if (errstr != NULL) {
1111 		printf("%s: %s\n", *argv, errstr);
1112 		free(errstr);
1113 		return;
1114 	}
1115 
1116 	if (miss != 0 || qid.type != 0) {
1117 		printf("%s: not a file\n", *argv);
1118 		if (miss == 0)
1119 			do_clunk(nfid);
1120 		return;
1121 	}
1122 
1123 	if ((tmpfd = tmp_file(sfn)) == -1) {
1124 		do_clunk(nfid);
1125 		return;
1126 	}
1127 
1128 	strlcpy(p, *argv, sizeof(p));
1129 	name = basename(p);
1130 
1131 	if (fetch_fid(nfid, tmpfd, name)) {
1132 		warn("failed fetch or can't write %s", sfn);
1133 		goto end;
1134 	}
1135 	close(tmpfd);
1136 
1137 	spawn(ed, sfn, NULL);
1138 
1139 	/*
1140 	 * Re-open the file because it's not guaranteed that the
1141 	 * file descriptor tmpfd is still associated with the file
1142 	 * pointed by sfn: it's not uncommon for editor to write
1143 	 * a backup file and then rename(2) it to the file name.
1144 	 */
1145 	if ((tmpfd = open(sfn, O_RDONLY)) == -1) {
1146 		warn("can't open %s", sfn);
1147 		goto end;
1148 	}
1149 
1150 	woc_file(tmpfd, *argv, name);
1151 	close(tmpfd);
1152 
1153 end:
1154 	unlink(sfn);
1155 }
1156 
1157 static void
1158 cmd_get(int argc, const char **argv)
1159 {
1160 	struct qid qid;
1161 	const char *l;
1162 	char *errstr;
1163 	int nfid, fd, miss;
1164 
1165 	if (argc != 1 && argc != 2) {
1166 		printf("usage: get remote-file [local-file]\n");
1167 		return;
1168 	}
1169 
1170 	if (argc == 2)
1171 		l = argv[1];
1172 	else if ((l = strrchr(argv[0], '/')) != NULL)
1173 		l++; /* skip / */
1174 	else
1175 		l = argv[0];
1176 
1177 	nfid = nextfid();
1178 	errstr = walk_path(pwdfid, nfid, argv[0], &miss, &qid);
1179 	if (errstr != NULL) {
1180 		printf("%s: %s\n", argv[0], errstr);
1181 		free(errstr);
1182 		return;
1183 	}
1184 
1185 	if (miss != 0 || qid.type != 0) {
1186 		printf("%s: not a file\n", argv[0]);
1187 		if (miss == 0)
1188 			do_clunk(nfid);
1189 		return;
1190 	}
1191 
1192 	if ((fd = open(l, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0644)) == -1) {
1193 		warn("can't open %s", l);
1194 		do_clunk(nfid);
1195 		return;
1196 	}
1197 
1198 	if (fetch_fid(nfid, fd, l) == -1)
1199 		warn("write %s", l);
1200 	close(fd);
1201 }
1202 
1203 static void
1204 cmd_hexdump(int argc, const char **argv)
1205 {
1206 	if (argc == 0) {
1207 		xdump = !xdump;
1208 		if (xdump)
1209 			puts("hexdump mode enabled");
1210 		else
1211 			puts("hexdump mode disabled");
1212 		return;
1213 	}
1214 
1215 	if (argc > 1)
1216 		goto usage;
1217 
1218 	if (!strcmp(*argv, "on")) {
1219 		xdump = 1;
1220 		puts("hexdump mode enabled");
1221 		return;
1222 	}
1223 
1224 	if (!strcmp(*argv, "off")) {
1225 		xdump = 0;
1226 		puts("hexdump mode disabled");
1227 		return;
1228 	}
1229 
1230 usage:
1231 	puts("usage: hexdump [on | off]");
1232 }
1233 
1234 static void
1235 cmd_lcd(int argc, const char **argv)
1236 {
1237 	const char *dir;
1238 
1239 	if (argc > 1) {
1240 		printf("usage: lcd [local-directory]\n");
1241 		return;
1242 	}
1243 
1244 	if (argc == 1)
1245 		dir = *argv;
1246 
1247 	if (argc == 0 && (dir = getenv("HOME")) == NULL) {
1248 		printf("HOME is not defined\n");
1249 		return;
1250 	}
1251 
1252 	if (chdir(dir) == -1)
1253 		printf("cd: %s: %s\n", dir, strerror(errno));
1254 }
1255 
1256 static void
1257 cmd_lpwd(int argc, const char **argv)
1258 {
1259 	char path[PATH_MAX];
1260 
1261 	if (argc != 0) {
1262 		printf("usage: lpwd\n");
1263 		return;
1264 	}
1265 
1266 	if (getcwd(path, sizeof(path)) == NULL) {
1267 		printf("lpwd: %s\n", strerror(errno));
1268 		return;
1269 	}
1270 
1271 	printf("%s\n", path);
1272 }
1273 
1274 static void
1275 cmd_ls(int argc, const char **argv)
1276 {
1277 	struct np_stat st;
1278 	time_t now, mtime;
1279 	struct tm *tm;
1280 	uint64_t off = 0;
1281 	uint32_t len;
1282 	int nfid;
1283 	const char *timfmt;
1284 	char fmt[FMT_SCALED_STRSIZE], tim[13], *errstr;
1285 
1286 	if (argc != 0) {
1287 		printf("ls don't take arguments (yet)\n");
1288 		return;
1289 	}
1290 
1291 	now = time(NULL);
1292 
1293 	nfid = nextfid();
1294 	if ((errstr = dup_fid(pwdfid, nfid)) != NULL) {
1295 		printf(".: %s\n", errstr);
1296 		free(errstr);
1297 		return;
1298 	}
1299 
1300 	do_open(nfid, KOREAD);
1301 
1302 	evbuffer_drain(dirbuf, EVBUFFER_LENGTH(dirbuf));
1303 
1304 	for (;;) {
1305 		tread(nfid, off, msize - IOHDRSZ);
1306 		do_send();
1307 		recv_msg();
1308 		expect2(Rread, iota_tag);
1309 
1310 		len = np_read32(buf);
1311 		if (len == 0)
1312 			break;
1313 
1314 		evbuffer_add_buffer(dirbuf, buf);
1315 		off += len;
1316 
1317 		ASSERT_EMPTYBUF();
1318 	}
1319 
1320 	while (EVBUFFER_LENGTH(dirbuf) != 0) {
1321 		if (np_read_stat(dirbuf, &st) == -1)
1322 			errx(1, "invalid stat struct read");
1323 
1324 		if (fmt_scaled(st.length, fmt) == -1)
1325 			strlcpy(fmt, "xxx", sizeof(fmt));
1326 
1327 		mtime = st.mtime;
1328 
1329 		if (now > mtime && (now - mtime) < 365/2 * 24 * 12 * 60)
1330 			timfmt = "%b %e %R";
1331 		else
1332 			timfmt = "%b %e  %Y";
1333 
1334 		if ((tm = localtime(&mtime)) == NULL ||
1335 		    strftime(tim, sizeof(tim), timfmt, tm) == 0)
1336 			strlcpy(tim, "unknown", sizeof(tim));
1337 
1338 		if (st.qid.type & QTDIR)
1339 			printf("d");
1340 		else
1341 			printf("-");
1342 		printf("%s", pp_perm(st.mode >> 6));
1343 		printf("%s", pp_perm(st.mode >> 3));
1344 		printf("%s", pp_perm(st.mode));
1345 		printf(" %8s %12s %s%s\n", fmt, tim, st.name,
1346 		    st.qid.type & QTDIR ? "/" : "");
1347 
1348 		free(st.name);
1349 		free(st.uid);
1350 		free(st.gid);
1351 		free(st.muid);
1352 	}
1353 
1354 	do_clunk(nfid);
1355 }
1356 
1357 static void
1358 cmd_page(int argc, const char **argv)
1359 {
1360 	struct qid qid;
1361 	int nfid, tmpfd, miss, r;
1362 	char sfn[TMPFSTRLEN], p[PATH_MAX], *name, *errstr;
1363 	const char *pager;
1364 
1365 	if (argc != 1) {
1366 		puts("usage: page file");
1367 		return;
1368 	}
1369 
1370 	if ((pager = getenv("PAGER")) == NULL)
1371 		pager = "less";
1372 
1373 	nfid = nextfid();
1374 	errstr = walk_path(pwdfid, nfid, *argv, &miss, &qid);
1375 	if (errstr != NULL) {
1376 		printf("%s: %s\n", *argv, errstr);
1377 		free(errstr);
1378 		return;
1379 	}
1380 
1381 	if (miss != 0 || qid.type != 0) {
1382 		printf("%s: not a file\n", *argv);
1383 		if (miss == 0)
1384 			do_clunk(nfid);
1385 		return;
1386 	}
1387 
1388 	if ((tmpfd = tmp_file(sfn)) == -1) {
1389 		do_clunk(nfid);
1390 		return;
1391 	}
1392 
1393 	strlcpy(p, *argv, sizeof(p));
1394 	name = basename(p);
1395 	if ((r = fetch_fid(nfid, tmpfd, name)) == -1)
1396 		warn("write %s", sfn);
1397 	close(tmpfd);
1398 	if (r != -1)
1399 		spawn(pager, sfn, NULL);
1400 	unlink(sfn);
1401 }
1402 
1403 static void
1404 cmd_pipe(int argc, const char **argv)
1405 {
1406 	struct qid qid;
1407 	pid_t pid;
1408 	int nfid, tmpfd, miss, status;
1409 	int filedes[2]; /* read end, write end */
1410 	char *errstr;
1411 
1412 	if (argc < 2) {
1413 		puts("usage: pipe remote-file cmd [args...]");
1414 		return;
1415 	}
1416 
1417 	nfid = nextfid();
1418 	errstr = walk_path(pwdfid, nfid, *argv, &miss, &qid);
1419 	if (errstr != NULL) {
1420 		printf("%s: %s\n", *argv, errstr);
1421 		free(errstr);
1422 		return;
1423 	}
1424 
1425 	if (miss != 0 || qid.type != 0) {
1426 		printf("%s: not a file\n", *argv);
1427 		if (miss == 0)
1428 			do_clunk(nfid);
1429 		return;
1430 	}
1431 
1432 	if (pipe(filedes) == -1)
1433 		err(1, "pipe");
1434 
1435 	switch (pid = vfork()) {
1436 	case -1:
1437 		err(1, "vfork");
1438 	case 0:
1439 		close(filedes[1]);
1440 		if (dup2(filedes[0], 0) == -1)
1441 			err(1, "dup2");
1442 		execvp(argv[1], (char *const *)argv + 1);
1443 		err(1, "execvp");
1444 	}
1445 
1446 	close(filedes[0]);
1447 	if (fetch_fid(nfid, filedes[1], *argv) == -1)
1448 		warnx("failed to fetch all the file");
1449 	close(filedes[1]);
1450 
1451 	waitpid(pid, &status, 0);
1452 }
1453 
1454 static void
1455 cmd_put(int argc, const char **argv)
1456 {
1457 	struct qid qid;
1458 	const char *l;
1459 	int fd;
1460 
1461 	if (argc != 1 && argc != 2) {
1462 		printf("usage: put local-file [remote-file]\n");
1463 		return;
1464 	}
1465 
1466 	if (argc == 2)
1467 		l = argv[1];
1468 	else if ((l = strrchr(argv[0], '/')) != NULL)
1469 		l++; /* skip / */
1470 	else
1471 		l = argv[0];
1472 
1473 	if ((fd = open(argv[0], O_RDONLY)) == -1) {
1474 		warn("%s", argv[0]);
1475 		return;
1476 	}
1477 
1478 	woc_file(fd, argv[0], l);
1479 	close(fd);
1480 }
1481 
1482 static void
1483 cmd_rename(int argc, const char **argv)
1484 {
1485 	struct np_stat st;
1486 	struct qid qid;
1487 	char *errstr;
1488 	int nfid, miss;
1489 
1490 	if (argc != 2) {
1491 		puts("usage: rename remote-file new-remote-name");
1492 		return;
1493 	}
1494 
1495 	nfid = nextfid();
1496 	errstr = walk_path(pwdfid, nfid, argv[0], &miss, &qid);
1497 	if (errstr != NULL) {
1498 		printf("%s: %s\n", argv[0], errstr);
1499 		free(errstr);
1500 		return;
1501 	}
1502 
1503 	if (miss != 0) {
1504 		printf("%s: not such file or directory\n", argv[0]);
1505 		return;
1506 	}
1507 
1508 	prepare_wstat(&st);
1509 	st.name = (char *)argv[1];
1510 	if ((errstr = do_wstat(nfid, &st)) != NULL) {
1511 		printf("rename: %s\n", errstr);
1512 		free(errstr);
1513 	}
1514 
1515 	do_clunk(nfid);
1516 }
1517 
1518 static void
1519 cmd_verbose(int argc, const char **argv)
1520 {
1521 	if (argc == 0) {
1522 		log_setverbose(!log_getverbose());
1523 		if (log_getverbose())
1524 			puts("verbose mode enabled");
1525 		else
1526 			puts("verbose mode disabled");
1527 		return;
1528 	}
1529 
1530 	if (argc != 1)
1531 		goto usage;
1532 
1533 	if (!strcmp(*argv, "on")) {
1534 		log_setverbose(1);
1535 		puts("verbose mode enabled");
1536 		return;
1537 	}
1538 
1539 	if (!strcmp(*argv, "off")) {
1540 		log_setverbose(0);
1541 		puts("verbose mode disabled");
1542 		return;
1543 	}
1544 
1545 usage:
1546 	printf("verbose [on | off]\n");
1547 }
1548 
1549 static void
1550 excmd(int argc, const char **argv)
1551 {
1552 	struct cmd {
1553 		const char	*name;
1554 		void		(*fn)(int, const char **);
1555 	} cmds[] = {
1556 		{"bell",	cmd_bell},
1557 		{"bye",		cmd_bye},
1558 		{"cd",		cmd_cd},
1559 		{"edit",	cmd_edit},
1560 		{"get",		cmd_get},
1561 		{"hexdump",	cmd_hexdump},
1562 		{"lcd",		cmd_lcd},
1563 		{"lpwd",	cmd_lpwd},
1564 		{"ls",		cmd_ls},
1565 		{"page",	cmd_page},
1566 		{"pipe",	cmd_pipe},
1567 		{"put",		cmd_put},
1568 		{"quit",	cmd_bye},
1569 		{"rename",	cmd_rename},
1570 		{"verbose",	cmd_verbose},
1571 	};
1572 	size_t i;
1573 
1574 	if (argc == 0)
1575 		return;
1576 	for (i = 0; i < nitems(cmds); ++i) {
1577 		if (!strcmp(cmds[i].name, *argv)) {
1578 			cmds[i].fn(argc-1, argv+1);
1579 			return;
1580 		}
1581 	}
1582 
1583 	log_warnx("unknown command %s", *argv);
1584 }
1585 
1586 static void
1587 cd_or_fetch(const char *path, const char *outfile)
1588 {
1589 	struct qid	 qid;
1590 	char		*errstr;
1591 	int		 fd, nfid, miss;
1592 
1593 	while (*path == '/')
1594 		path++;
1595 	if (*path == '\0')
1596 		return;
1597 
1598 	nfid = nextfid();
1599 	errstr = walk_path(pwdfid, nfid, path, &miss, &qid);
1600 	if (errstr)
1601 		errx(1, "walk %s: %s", path, errstr);
1602 	if (miss)
1603 		errc(1, ENOENT, "walk %s", path);
1604 
1605 	if (qid.type & QTDIR) {
1606 		if (outfile)
1607 			errx(1, "can't fetch directory %s", path);
1608 		do_clunk(pwdfid);
1609 		pwdfid = nfid;
1610 		return;
1611 	}
1612 
1613 	if (outfile == NULL) {
1614 		if ((outfile = strrchr(path, '/')) == NULL)
1615 			outfile = path;
1616 		else
1617 			outfile++;
1618 		if (*outfile == '\0')
1619 			errx(1, "invalid path: missing file name: %s",
1620 			    path);
1621 	}
1622 
1623 	if (strcmp(outfile, "-") != 0) {
1624 		fd = open(outfile, O_WRONLY|O_CREAT, 0644);
1625 		if (fd == -1)
1626 			err(1, "can't open for writing %s", outfile);
1627 	} else
1628 		fd = 1;
1629 
1630 	if (fetch_fid(nfid, fd, outfile) == -1)
1631 		err(1, "write %s", outfile);
1632 	close(fd);
1633 	fclose(fp);
1634 	exit(0);
1635 }
1636 
1637 static const char *
1638 parse_addr(const char *url, const char **user,
1639     const char **port, const char **path)
1640 {
1641 	static char	 buf[PATH_MAX];
1642 	char		*host, *t;
1643 
1644 	*user = *port = *path = NULL;
1645 	host = buf;
1646 
1647 	if (strlcpy(buf, url, sizeof(buf)) >= sizeof(buf))
1648 		errx(1, "connection string too long");
1649 
1650 	if ((t = strchr(host, '/')) != NULL) {
1651 		if (t == host)
1652 			errx(1, "invalid connection string: %s", url);
1653 		*t++ = '\0';
1654 		if (*t != '\0')
1655 			*path = t;
1656 	}
1657 
1658 	if ((t = strchr(host, '@')) != NULL) {
1659 		if (t == host)
1660 			errx(1, "invalid connection string: %s", url);
1661 		*t++ = '\0';
1662 		*user = host;
1663 		host = t;
1664 	} else if ((*user = getenv("USER")) == NULL)
1665 		errx(1, "USER not defined");
1666 
1667 	if ((t = strchr(host, ':')) != NULL) {
1668 		*t++ = '\0';
1669 		if (*t != '\0')
1670 			*port = t;
1671 	}
1672 	if (*port == NULL)
1673 		*port = "1337";
1674 
1675 	return host;
1676 }
1677 
1678 int
1679 main(int argc, char **argv)
1680 {
1681 	const char	*user, *host, *port, *path;
1682 	const char	*outfile = NULL;
1683 	int		 ch;
1684 
1685 	log_init(1, LOG_DAEMON);
1686 	log_setverbose(0);
1687 	log_procinit(getprogname());
1688 
1689 	while ((ch = getopt(argc, argv, "C:cK:o:")) != -1) {
1690 		switch (ch) {
1691 		case 'C':
1692 			tls = 1;
1693 			crtpath = optarg;
1694 			break;
1695 		case 'c': /* deprecated, remove after 0.3 */
1696 			tls = 1;
1697 			break;
1698 		case 'K':
1699 			tls = 1;
1700 			keypath = optarg;
1701 			break;
1702 		case 'o':
1703 			outfile = optarg;
1704 			break;
1705 		default:
1706 			usage(1);
1707 		}
1708 	}
1709 	argc -= optind;
1710 	argv += optind;
1711 
1712 	if (argc == 0 || (tls && crtpath == NULL))
1713 		usage(1);
1714 
1715 	host = parse_addr(argv[0], &user, &port, &path);
1716 	if (path == NULL && argv[1] != NULL)
1717 		path = argv[1];
1718 	if (outfile && path == NULL)
1719 		usage(1);
1720 
1721 	signal(SIGPIPE, SIG_IGN);
1722 	if (isatty(1)) {
1723 		tty_p = 1;
1724 		resized = 1;
1725 		signal(SIGWINCH, tty_resized);
1726 	}
1727 
1728 	if ((evb = evbuffer_new()) == NULL)
1729 		fatal("evbuffer_new");
1730 
1731 	if ((buf = evbuffer_new()) == NULL)
1732 		fatal("evbuffer_new");
1733 
1734 	if ((dirbuf = evbuffer_new()) == NULL)
1735 		fatal("evbuferr_new");
1736 
1737 	do_connect(host, port, user);
1738 	if (path)
1739 		cd_or_fetch(path, outfile);
1740 
1741 	for (;;) {
1742 		int argc = 0;
1743 		char *line, *argv[16] = {0}, **ap;
1744 
1745 		if ((line = read_line("kamiftp> ")) == NULL)
1746 			break;
1747 
1748 		for (argc = 0, ap = argv; ap < &argv[15] &&
1749 		    (*ap = strsep(&line, " \t")) != NULL;) {
1750 			if (**ap != '\0')
1751 				ap++, argc++;
1752 		}
1753 		excmd(argc, (const char **)argv);
1754 
1755 		if (bell) {
1756 			printf("\a");
1757 			fflush(stdout);
1758 		}
1759 
1760 		free(line);
1761 	}
1762 
1763 	printf("\n");
1764 	fclose(fp);
1765 }