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