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Date:: Sun Jan 30 23:24:17 2022 UTC
Message:: make -C and -K imply -c
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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 	if (np_read_stat(buf, st) == -1)
581 		errx(1, "invalid stat struct read");
582 
583 	ASSERT_EMPTYBUF();
584 }
585 
586 static char *
587 do_wstat(int fid, const struct np_stat *st)
588 {
589 	char *errstr;
590 
591 	twstat(fid, st);
592 	do_send();
593 	recv_msg();
594 
595 	if ((errstr = check(Rwstat, iota_tag)) != NULL)
596 		return errstr;
597 
598 	ASSERT_EMPTYBUF();
599 
600 	return NULL;
601 }
602 
603 static size_t
604 do_read(int fid, uint64_t off, uint32_t count, void *data)
605 {
606 	uint32_t r;
607 
608 	tread(fid, off, count);
609 	do_send();
610 	recv_msg();
611 	expect2(Rread, iota_tag);
612 
613 	r = np_read32(buf);
614 	assert(r == EVBUFFER_LENGTH(buf));
615 	assert(r <= count);
616 	evbuffer_remove(buf, data, r);
617 
618 	ASSERT_EMPTYBUF();
619 
620 	return r;
621 }
622 
623 static size_t
624 do_write(int fid, uint64_t off, uint32_t count, void *data)
625 {
626 	uint32_t r;
627 
628 	twrite(fid, off, data, count);
629 	do_send();
630 	recv_msg();
631 	expect2(Rwrite, iota_tag);
632 
633 	r = np_read32(buf);
634 	assert(r <= count);
635 
636 	ASSERT_EMPTYBUF();
637 
638 	return r;
639 }
640 
641 static void
642 draw_progress(const char *pre, const struct progress *p)
643 {
644 	struct winsize ws;
645 	int i, l, w;
646 	double perc;
647 
648 	if (xdump)
649 		return;
650 
651 	perc = 100.0 * p->done / p->max;
652 	if (!tty_p) {
653 		fprintf(stderr, "%s: %d%%\n", pre, (int)perc);
654 		return;
655 	}
656 
657 	if (resized) {
658 		resized = 0;
659 
660 		if (ioctl(0, TIOCGWINSZ, &ws) == -1)
661 			return;
662 		tty_width = ws.ws_col;
663 	}
664 	w = tty_width;
665 
666 	if (pre == NULL ||
667 	    ((l = printf("\r%s ", pre)) == -1 || l >= w))
668 		return;
669 
670 	w -= l + 2 + 5; /* 2 for |, 5 for percentage + \n */
671 	if (w < 0) {
672 		printf("%4d%%\n", (int)perc);
673 		return;
674 	}
675 
676 	printf("|");
677 
678 	l = w * MIN(100.0, perc) / 100.0;
679 	for (i = 0; i < l; i++)
680 		printf("*");
681 	for (; i < w; i++)
682 		printf(" ");
683 	printf("|%4d%%", (int)perc);
684 
685 	fflush(stdout);
686 }
687 
688 static int
689 fetch_fid(int fid, int fd, const char *name)
690 {
691 	struct progress p = {0};
692 	struct np_stat st;
693 	size_t r;
694 	int ret = 0;
695 	char buf[BUFSIZ];
696 
697 	do_stat(fid, &st);
698 	do_open(fid, KOREAD);
699 
700 	p.max = st.length;
701 	for (;;) {
702 		size_t off;
703 		ssize_t nw;
704 
705 		r = do_read(fid, p.done, sizeof(buf), buf);
706 		if (r == 0)
707 			break;
708 
709 		for (off = 0; off < r; off += nw)
710 			if ((nw = write(fd, buf + off, r - off)) == 0 ||
711 			    nw == -1) {
712 				ret = -1;
713 				goto end;
714 			}
715 
716 		p.done += r;
717 		draw_progress(name, &p);
718 
719 #if 0
720 		/* throttle, for debugging purpose */
721 		{
722 			struct timespec ts = { 0, 500000000 };
723 			nanosleep(&ts, NULL);
724 		}
725 #endif
726 	}
727 
728 end:
729 	putchar('\n');
730 
731 	do_clunk(fid);
732 	return ret;
733 }
734 
735 static void
736 send_fid(int fid, const char *fnam, int open_flags, int fd, const char *name)
737 {
738 	struct progress p = {0};
739 	struct stat sb;
740 	ssize_t r;
741 	size_t w;
742 	char buf[BUFSIZ];
743 
744 	if (fstat(fd, &sb) == -1)
745 		err(1, "fstat");
746 
747 	if (fnam != NULL)
748 		do_create(fid, fnam, 0644, KOWRITE);
749 	else
750 		do_open(fid, open_flags | KOWRITE);
751 
752 	p.max = sb.st_size;
753 	for (;;) {
754 		r = read(fd, buf, sizeof(buf));
755 		if (r == 0)
756 			break;
757 		if (r == -1)
758 			err(1, "read");
759 
760 		w = do_write(fid, p.done, r, buf);
761 		p.done += w;
762 
763 		draw_progress(name, &p);
764 
765 #if 0
766 		/* throttle, for debugging purpose */
767 		{
768 			struct timespec ts = { 0, 500000000 };
769 			nanosleep(&ts, NULL);
770 		}
771 #endif
772 	}
773 
774 	putchar('\n');
775 	do_clunk(fid);
776 }
777 
778 static int
779 woc_file(int fd, const char *prompt, const char *path)
780 {
781 	struct qid qid;
782 	const char *n = NULL;
783 	char *errstr;
784 	int nfid, miss;
785 
786 	nfid = nextfid();
787 	errstr = walk_path(pwdfid, nfid, path, &miss, &qid);
788 	if (errstr != NULL && miss > 1) {
789 		printf("%s: %s\n", path, errstr);
790 		free(errstr);
791 		return -1;
792 	}
793 
794 	if (errstr != NULL || miss == 1) {
795 		char p[PATH_MAX], *dn;
796 
797 		/*
798 		 * If it's only one component missing (the file name), walk
799 		 * to the parent directory and try to create the file.
800 		 */
801 
802 		if (strlcpy(p, path, sizeof(p)) >= sizeof(p)) {
803 			printf("path too long: %s\n", path);
804 			return -1;
805 		}
806 		dn = dirname(p);
807 
808 		if (!strcmp(dn, ".")) {
809 			errstr = dup_fid(pwdfid, nfid);
810 			miss = 0;
811 		} else
812 			errstr = walk_path(pwdfid, nfid, dn, &miss, &qid);
813 
814 		if (errstr != NULL) {
815 			printf("%s: %s\n", dn, errstr);
816 			free(errstr);
817 			return -1;
818 		}
819 
820 		if (miss != 0) {
821 			printf("%s: not a directory\n", dn);
822 			return -1;
823 		}
824 
825 		if ((n = strrchr(path, '/')) != NULL)
826 			n++;
827 		else
828 			n = path;
829 	}
830 
831 	free(errstr);
832 
833 	if (miss > 1) {
834 		printf("can't create %s: missing %d path component(s)\n",
835 		    path, miss);
836 		return -1;
837 	}
838 
839 	send_fid(nfid, n, KOTRUNC, fd, prompt);
840 	return 0;
841 }
842 
843 static void
844 do_tls_connect(const char *host, const char *port)
845 {
846 	int handshake;
847 
848 	if ((tlsconf = tls_config_new()) == NULL)
849 		fatalx("tls_config_new");
850 	tls_config_insecure_noverifycert(tlsconf);
851 	tls_config_insecure_noverifyname(tlsconf);
852 
853 	if (keypath == NULL)
854 		keypath = crtpath;
855 
856 	if (tls_config_set_keypair_file(tlsconf, crtpath, keypath) == -1)
857 		fatalx("can't load certs (%s, %s)", crtpath, keypath);
858 
859 	if ((ctx = tls_client()) == NULL)
860 		fatal("tls_client");
861 	if (tls_configure(ctx, tlsconf) == -1)
862 		fatalx("tls_configure: %s", tls_error(ctx));
863 
864 	if (tls_connect(ctx, host, port) == -1)
865 		fatalx("can't connect to %s:%s: %s", host, port,
866 		    tls_error(ctx));
867 
868 	for (handshake = 0; !handshake;) {
869 		switch (tls_handshake(ctx)) {
870 		case -1:
871 			fatalx("tls_handshake: %s", tls_error(ctx));
872 		case 0:
873 			handshake = 1;
874 			break;
875 		}
876 	}
877 }
878 
879 static void
880 do_ctxt_connect(const char *host, const char *port)
881 {
882 	struct addrinfo hints, *res, *res0;
883 	int error, saved_errno;
884 	const char *cause = NULL;
885 
886 	memset(&hints, 0, sizeof(hints));
887 	hints.ai_family = AF_UNSPEC;
888 	hints.ai_socktype = SOCK_STREAM;
889 	error = getaddrinfo(host, port, &hints, &res0);
890 	if (error)
891 		errx(1, "%s", gai_strerror(error));
892 
893 	sock = -1;
894 	for (res = res0; res != NULL; res = res->ai_next) {
895 		sock = socket(res->ai_family, res->ai_socktype|SOCK_CLOEXEC,
896 		    res->ai_protocol);
897 		if (sock == -1) {
898 			cause = "socket";
899 			continue;
900 		}
901 
902 		if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
903 			cause = "connect";
904 			saved_errno = errno;
905 			close(sock);
906 			errno = saved_errno;
907 			sock = -1;
908 			continue;
909 		}
910 
911 		break;
912 	}
913 
914 	if (sock == -1)
915 		err(1, "%s", cause);
916 	freeaddrinfo(res0);
917 }
918 
919 static void
920 do_connect(const char *connspec, const char *path)
921 {
922 	char *host, *colon;
923 	const char *port;
924 
925 	host = xstrdup(connspec);
926 	if ((colon = strchr(host, ':')) != NULL) {
927 		*colon = '\0';
928 		port = ++colon;
929 	} else
930 		port = "1337";
931 
932 	printf("connecting to %s:%s...", host, port);
933 	fflush(stdout);
934 
935 	if (tls)
936 		do_tls_connect(host, port);
937 	else
938 		do_ctxt_connect(host, port);
939 
940 	printf(" done!\n");
941 
942 	do_version();
943 	do_attach(path);
944 
945 	free(host);
946 }
947 
948 static int
949 tmp_file(char sfn[TMPFSTRLEN])
950 {
951 	int tmpfd;
952 
953 	strlcpy(sfn, TMPFSTR, TMPFSTRLEN);
954 	if ((tmpfd = mkstemp(sfn)) == -1) {
955 		warn("mkstemp %s", sfn);
956 		return -1;
957 	}
958 
959 	/* set the close-on-exec flag */
960 	if (fcntl(tmpfd, F_SETFD, FD_CLOEXEC) == -1) {
961 		warn("fcntl");
962 		close(tmpfd);
963 		return -1;
964 	}
965 
966 	return tmpfd;
967 }
968 
969 static inline const char *
970 pp_perm(uint8_t x)
971 {
972 	switch (x & 0x7) {
973 	case 0x0:
974 		return "---";
975 	case 0x1:
976 		return "--x";
977 	case 0x2:
978 		return "-w-";
979 	case 0x3:
980 		return "-wx";
981 	case 0x4:
982 		return "r--";
983 	case 0x5:
984 		return "r-x";
985 	case 0x6:
986 		return "rw-";
987 	case 0x7:
988 		return "rwx";
989 	default:
990 		/* unreachable, just for the compiler' happiness */
991 		return "???";
992 	}
993 }
994 
995 static inline void
996 prepare_wstat(struct np_stat *st)
997 {
998 	memset(st, 0xFF, sizeof(*st));
999 	st->name = NULL;
1000 	st->uid = NULL;
1001 	st->gid = NULL;
1002 	st->muid = NULL;
1003 }
1004 
1005 static void
1006 cmd_bell(int argc, const char **argv)
1007 {
1008 	if (argc == 0) {
1009 		bell = !bell;
1010 		if (bell)
1011 			puts("bell mode enabled");
1012 		else
1013 			puts("bell mode disabled");
1014 		return;
1015 	}
1016 
1017 	if (argc != 1)
1018 		goto usage;
1019 
1020 	if (!strcmp(*argv, "on")) {
1021 		bell = 1;
1022 		puts("bell mode enabled");
1023 		return;
1024 	}
1025 
1026 	if (!strcmp(*argv, "off")) {
1027 		bell = 0;
1028 		puts("bell mode disabled");
1029 		return;
1030 	}
1031 
1032 usage:
1033 	printf("bell [on | off]\n");
1034 }
1035 
1036 static void
1037 cmd_bye(int argc, const char **argv)
1038 {
1039 	log_warnx("bye\n");
1040 	exit(0);
1041 }
1042 
1043 static void
1044 cmd_cd(int argc, const char **argv)
1045 {
1046 	struct qid qid;
1047 	int nfid, miss;
1048 	char *errstr;
1049 
1050 	if (argc != 1) {
1051 		printf("usage: cd remote-path\n");
1052 		return;
1053 	}
1054 
1055 	nfid = nextfid();
1056 	errstr = walk_path(pwdfid, nfid, argv[0], &miss, &qid);
1057 	if (errstr != NULL) {
1058 		printf("%s: %s\n", argv[0], errstr);
1059 		free(errstr);
1060 		return;
1061 	}
1062 
1063 	if (miss != 0 || !(qid.type & QTDIR)) {
1064 		printf("%s: not a directory\n", argv[0]);
1065 		if (miss == 0)
1066 			do_clunk(nfid);
1067 		return;
1068 	}
1069 
1070 	do_clunk(pwdfid);
1071 	pwdfid = nfid;
1072 }
1073 
1074 static void
1075 cmd_edit(int argc, const char **argv)
1076 {
1077 	struct qid qid;
1078 	int nfid, tmpfd, miss;
1079 	char sfn[TMPFSTRLEN], p[PATH_MAX], *name, *errstr;
1080 	const char *ed;
1081 
1082 	if (argc != 1) {
1083 		puts("usage: edit file");
1084 		return;
1085 	}
1086 
1087 	if ((ed = getenv("VISUAL")) == NULL &&
1088 	    (ed = getenv("EDITOR")) == NULL)
1089 		ed = "ed";
1090 
1091 	nfid = nextfid();
1092 	errstr = walk_path(pwdfid, nfid, *argv, &miss, &qid);
1093 	if (errstr != NULL) {
1094 		printf("%s: %s\n", *argv, errstr);
1095 		free(errstr);
1096 		return;
1097 	}
1098 
1099 	if (miss != 0 || qid.type != 0) {
1100 		printf("%s: not a file\n", *argv);
1101 		if (miss == 0)
1102 			do_clunk(nfid);
1103 		return;
1104 	}
1105 
1106 	if ((tmpfd = tmp_file(sfn)) == -1) {
1107 		do_clunk(nfid);
1108 		return;
1109 	}
1110 
1111 	strlcpy(p, *argv, sizeof(p));
1112 	name = basename(p);
1113 
1114 	if (fetch_fid(nfid, tmpfd, name)) {
1115 		warn("failed fetch or can't write %s", sfn);
1116 		goto end;
1117 	}
1118 	close(tmpfd);
1119 
1120 	spawn(ed, sfn, NULL);
1121 
1122 	/*
1123 	 * Re-open the file because it's not guaranteed that the
1124 	 * file descriptor tmpfd is still associated with the file
1125 	 * pointed by sfn: it's not uncommon for editor to write
1126 	 * a backup file and then rename(2) it to the file name.
1127 	 */
1128 	if ((tmpfd = open(sfn, O_RDONLY)) == -1) {
1129 		warn("can't open %s", sfn);
1130 		goto end;
1131 	}
1132 
1133 	woc_file(tmpfd, *argv, name);
1134 	close(tmpfd);
1135 
1136 end:
1137 	unlink(sfn);
1138 }
1139 
1140 static void
1141 cmd_get(int argc, const char **argv)
1142 {
1143 	struct qid qid;
1144 	const char *l;
1145 	char *errstr;
1146 	int nfid, fd, miss;
1147 
1148 	if (argc != 1 && argc != 2) {
1149 		printf("usage: get remote-file [local-file]\n");
1150 		return;
1151 	}
1152 
1153 	if (argc == 2)
1154 		l = argv[1];
1155 	else if ((l = strrchr(argv[0], '/')) != NULL)
1156 		l++; /* skip / */
1157 	else
1158 		l = argv[0];
1159 
1160 	nfid = nextfid();
1161 	errstr = walk_path(pwdfid, nfid, argv[0], &miss, &qid);
1162 	if (errstr != NULL) {
1163 		printf("%s: %s\n", argv[0], errstr);
1164 		free(errstr);
1165 		return;
1166 	}
1167 
1168 	if (miss != 0 || qid.type != 0) {
1169 		printf("%s: not a file\n", argv[0]);
1170 		if (miss == 0)
1171 			do_clunk(nfid);
1172 		return;
1173 	}
1174 
1175 	if ((fd = open(l, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0644)) == -1) {
1176 		warn("can't open %s", l);
1177 		do_clunk(nfid);
1178 		return;
1179 	}
1180 
1181 	if (fetch_fid(nfid, fd, l) == -1)
1182 		warn("write %s", l);
1183 	close(fd);
1184 }
1185 
1186 static void
1187 cmd_hexdump(int argc, const char **argv)
1188 {
1189 	if (argc == 0) {
1190 		xdump = !xdump;
1191 		if (xdump)
1192 			puts("hexdump mode enabled");
1193 		else
1194 			puts("hexdump mode disabled");
1195 		return;
1196 	}
1197 
1198 	if (argc > 1)
1199 		goto usage;
1200 
1201 	if (!strcmp(*argv, "on")) {
1202 		xdump = 1;
1203 		puts("hexdump mode enabled");
1204 		return;
1205 	}
1206 
1207 	if (!strcmp(*argv, "off")) {
1208 		xdump = 0;
1209 		puts("hexdump mode disabled");
1210 		return;
1211 	}
1212 
1213 usage:
1214 	puts("usage: hexdump [on | off]");
1215 }
1216 
1217 static void
1218 cmd_lcd(int argc, const char **argv)
1219 {
1220 	const char *dir;
1221 
1222 	if (argc > 1) {
1223 		printf("usage: lcd [local-directory]\n");
1224 		return;
1225 	}
1226 
1227 	if (argc == 1)
1228 		dir = *argv;
1229 
1230 	if (argc == 0 && (dir = getenv("HOME")) == NULL) {
1231 		printf("HOME is not defined\n");
1232 		return;
1233 	}
1234 
1235 	if (chdir(dir) == -1)
1236 		printf("cd: %s: %s\n", dir, strerror(errno));
1237 }
1238 
1239 static void
1240 cmd_lpwd(int argc, const char **argv)
1241 {
1242 	char path[PATH_MAX];
1243 
1244 	if (argc != 0) {
1245 		printf("usage: lpwd\n");
1246 		return;
1247 	}
1248 
1249 	if (getcwd(path, sizeof(path)) == NULL) {
1250 		printf("lpwd: %s\n", strerror(errno));
1251 		return;
1252 	}
1253 
1254 	printf("%s\n", path);
1255 }
1256 
1257 static void
1258 cmd_ls(int argc, const char **argv)
1259 {
1260 	struct np_stat st;
1261 	time_t now, mtime;
1262 	struct tm *tm;
1263 	uint64_t off = 0;
1264 	uint32_t len;
1265 	int nfid;
1266 	const char *timfmt;
1267 	char fmt[FMT_SCALED_STRSIZE], tim[13], *errstr;
1268 
1269 	if (argc != 0) {
1270 		printf("ls don't take arguments (yet)\n");
1271 		return;
1272 	}
1273 
1274 	now = time(NULL);
1275 
1276 	nfid = nextfid();
1277 	if ((errstr = dup_fid(pwdfid, nfid)) != NULL) {
1278 		printf(".: %s\n", errstr);
1279 		free(errstr);
1280 		return;
1281 	}
1282 
1283 	do_open(nfid, KOREAD);
1284 
1285 	evbuffer_drain(dirbuf, EVBUFFER_LENGTH(dirbuf));
1286 
1287 	for (;;) {
1288 		tread(nfid, off, BUFSIZ);
1289 		do_send();
1290 		recv_msg();
1291 		expect2(Rread, iota_tag);
1292 
1293 		len = np_read32(buf);
1294 		if (len == 0)
1295 			break;
1296 
1297 		evbuffer_add_buffer(dirbuf, buf);
1298 		off += len;
1299 
1300 		ASSERT_EMPTYBUF();
1301 	}
1302 
1303 	while (EVBUFFER_LENGTH(dirbuf) != 0) {
1304 		if (np_read_stat(dirbuf, &st) == -1)
1305 			errx(1, "invalid stat struct read");
1306 
1307 		if (fmt_scaled(st.length, fmt) == -1)
1308 			strlcpy(fmt, "xxx", sizeof(fmt));
1309 
1310 		mtime = st.mtime;
1311 
1312 		if (now > mtime && (now - mtime) < 365/2 * 24 * 12 * 60)
1313 			timfmt = "%b %e %R";
1314 		else
1315 			timfmt = "%b %e  %Y";
1316 
1317 		if ((tm = localtime(&mtime)) == NULL ||
1318 		    strftime(tim, sizeof(tim), timfmt, tm) == 0)
1319 			strlcpy(tim, "unknown", sizeof(tim));
1320 
1321 		if (st.qid.type & QTDIR)
1322 			printf("d");
1323 		else
1324 			printf("-");
1325 		printf("%s", pp_perm(st.mode >> 6));
1326 		printf("%s", pp_perm(st.mode >> 3));
1327 		printf("%s", pp_perm(st.mode));
1328 		printf(" %8s %12s %s%s\n", fmt, tim, st.name,
1329 		    st.qid.type & QTDIR ? "/" : "");
1330 
1331 		free(st.name);
1332 		free(st.uid);
1333 		free(st.gid);
1334 		free(st.muid);
1335 	}
1336 
1337 	do_clunk(nfid);
1338 }
1339 
1340 static void
1341 cmd_page(int argc, const char **argv)
1342 {
1343 	struct qid qid;
1344 	int nfid, tmpfd, miss, r;
1345 	char sfn[TMPFSTRLEN], p[PATH_MAX], *name, *errstr;
1346 	const char *pager;
1347 
1348 	if (argc != 1) {
1349 		puts("usage: page file");
1350 		return;
1351 	}
1352 
1353 	if ((pager = getenv("PAGER")) == NULL)
1354 		pager = "less";
1355 
1356 	nfid = nextfid();
1357 	errstr = walk_path(pwdfid, nfid, *argv, &miss, &qid);
1358 	if (errstr != NULL) {
1359 		printf("%s: %s\n", *argv, errstr);
1360 		free(errstr);
1361 		return;
1362 	}
1363 
1364 	if (miss != 0 || qid.type != 0) {
1365 		printf("%s: not a file\n", *argv);
1366 		if (miss == 0)
1367 			do_clunk(nfid);
1368 		return;
1369 	}
1370 
1371 	if ((tmpfd = tmp_file(sfn)) == -1) {
1372 		do_clunk(nfid);
1373 		return;
1374 	}
1375 
1376 	strlcpy(p, *argv, sizeof(p));
1377 	name = basename(p);
1378 	if ((r = fetch_fid(nfid, tmpfd, name)) == -1)
1379 		warn("write %s", sfn);
1380 	close(tmpfd);
1381 	if (r != -1)
1382 		spawn(pager, sfn, NULL);
1383 	unlink(sfn);
1384 }
1385 
1386 static void
1387 cmd_pipe(int argc, const char **argv)
1388 {
1389 	struct qid qid;
1390 	pid_t pid;
1391 	int nfid, tmpfd, miss, status;
1392 	int filedes[2]; /* read end, write end */
1393 	char *errstr;
1394 
1395 	if (argc < 2) {
1396 		puts("usage: pipe remote-file cmd [args...]");
1397 		return;
1398 	}
1399 
1400 	nfid = nextfid();
1401 	errstr = walk_path(pwdfid, nfid, *argv, &miss, &qid);
1402 	if (errstr != NULL) {
1403 		printf("%s: %s\n", *argv, errstr);
1404 		free(errstr);
1405 		return;
1406 	}
1407 
1408 	if (miss != 0 || qid.type != 0) {
1409 		printf("%s: not a file\n", *argv);
1410 		if (miss == 0)
1411 			do_clunk(nfid);
1412 		return;
1413 	}
1414 
1415 	if (pipe(filedes) == -1)
1416 		err(1, "pipe");
1417 
1418 	switch (pid = vfork()) {
1419 	case -1:
1420 		err(1, "vfork");
1421 	case 0:
1422 		close(filedes[1]);
1423 		if (dup2(filedes[0], 0) == -1)
1424 			err(1, "dup2");
1425 		execvp(argv[1], (char *const *)argv + 1);
1426 		err(1, "execvp");
1427 	}
1428 
1429 	close(filedes[0]);
1430 	if (fetch_fid(nfid, filedes[1], *argv) == -1)
1431 		warnx("failed to fetch all the file");
1432 	close(filedes[1]);
1433 
1434 	waitpid(pid, &status, 0);
1435 }
1436 
1437 static void
1438 cmd_put(int argc, const char **argv)
1439 {
1440 	struct qid qid;
1441 	const char *l;
1442 	int fd;
1443 
1444 	if (argc != 1 && argc != 2) {
1445 		printf("usage: put local-file [remote-file]\n");
1446 		return;
1447 	}
1448 
1449 	if (argc == 2)
1450 		l = argv[1];
1451 	else if ((l = strrchr(argv[0], '/')) != NULL)
1452 		l++; /* skip / */
1453 	else
1454 		l = argv[0];
1455 
1456 	if ((fd = open(argv[0], O_RDONLY)) == -1) {
1457 		warn("%s", argv[0]);
1458 		return;
1459 	}
1460 
1461 	woc_file(fd, argv[0], l);
1462 	close(fd);
1463 }
1464 
1465 static void
1466 cmd_rename(int argc, const char **argv)
1467 {
1468 	struct np_stat st;
1469 	struct qid qid;
1470 	char *errstr;
1471 	int nfid, miss;
1472 
1473 	if (argc != 2) {
1474 		puts("usage: rename remote-file new-remote-name");
1475 		return;
1476 	}
1477 
1478 	nfid = nextfid();
1479 	errstr = walk_path(pwdfid, nfid, argv[0], &miss, &qid);
1480 	if (errstr != NULL) {
1481 		printf("%s: %s\n", argv[0], errstr);
1482 		free(errstr);
1483 		return;
1484 	}
1485 
1486 	if (miss != 0) {
1487 		printf("%s: not such file or directory\n", argv[0]);
1488 		return;
1489 	}
1490 
1491 	prepare_wstat(&st);
1492 	st.name = (char *)argv[1];
1493 	if ((errstr = do_wstat(nfid, &st)) != NULL) {
1494 		printf("rename: %s\n", errstr);
1495 		free(errstr);
1496 	}
1497 
1498 	do_clunk(nfid);
1499 }
1500 
1501 static void
1502 cmd_verbose(int argc, const char **argv)
1503 {
1504 	if (argc == 0) {
1505 		log_setverbose(!log_getverbose());
1506 		if (log_getverbose())
1507 			puts("verbose mode enabled");
1508 		else
1509 			puts("verbose mode disabled");
1510 		return;
1511 	}
1512 
1513 	if (argc != 1)
1514 		goto usage;
1515 
1516 	if (!strcmp(*argv, "on")) {
1517 		log_setverbose(1);
1518 		puts("verbose mode enabled");
1519 		return;
1520 	}
1521 
1522 	if (!strcmp(*argv, "off")) {
1523 		log_setverbose(0);
1524 		puts("verbose mode disabled");
1525 		return;
1526 	}
1527 
1528 usage:
1529 	printf("verbose [on | off]\n");
1530 }
1531 
1532 static void
1533 excmd(int argc, const char **argv)
1534 {
1535 	struct cmd {
1536 		const char	*name;
1537 		void		(*fn)(int, const char **);
1538 	} cmds[] = {
1539 		{"bell",	cmd_bell},
1540 		{"bye",		cmd_bye},
1541 		{"cd",		cmd_cd},
1542 		{"edit",	cmd_edit},
1543 		{"get",		cmd_get},
1544 		{"hexdump",	cmd_hexdump},
1545 		{"lcd",		cmd_lcd},
1546 		{"lpwd",	cmd_lpwd},
1547 		{"ls",		cmd_ls},
1548 		{"page",	cmd_page},
1549 		{"pipe",	cmd_pipe},
1550 		{"put",		cmd_put},
1551 		{"quit",	cmd_bye},
1552 		{"rename",	cmd_rename},
1553 		{"verbose",	cmd_verbose},
1554 	};
1555 	size_t i;
1556 
1557 	if (argc == 0)
1558 		return;
1559 	for (i = 0; i < nitems(cmds); ++i) {
1560 		if (!strcmp(cmds[i].name, *argv)) {
1561 			cmds[i].fn(argc-1, argv+1);
1562 			return;
1563 		}
1564 	}
1565 
1566 	log_warnx("unknown command %s", *argv);
1567 }
1568 
1569 int
1570 main(int argc, char **argv)
1571 {
1572 	int	ch;
1573 
1574 	log_init(1, LOG_DAEMON);
1575 	log_setverbose(0);
1576 	log_procinit(getprogname());
1577 
1578 	while ((ch = getopt(argc, argv, "C:cK:")) != -1) {
1579 		switch (ch) {
1580 		case 'C':
1581 			tls = 1;
1582 			crtpath = optarg;
1583 			break;
1584 		case 'c':
1585 			tls = 1;
1586 			break;
1587 		case 'K':
1588 			tls = 1;
1589 			keypath = optarg;
1590 			break;
1591 		default:
1592 			usage(1);
1593 		}
1594 	}
1595 	argc -= optind;
1596 	argv += optind;
1597 
1598 	if (argc == 0 || (tls && crtpath == NULL))
1599 		usage(1);
1600 
1601 	signal(SIGPIPE, SIG_IGN);
1602 	if (isatty(1)) {
1603 		tty_p = 1;
1604 		resized = 1;
1605 		signal(SIGWINCH, tty_resized);
1606 	}
1607 
1608 	if ((evb = evbuffer_new()) == NULL)
1609 		fatal("evbuffer_new");
1610 
1611 	if ((buf = evbuffer_new()) == NULL)
1612 		fatal("evbuffer_new");
1613 
1614 	if ((dirbuf = evbuffer_new()) == NULL)
1615 		fatal("evbuferr_new");
1616 
1617 	do_connect(argv[0], argv[1]);
1618 
1619 	for (;;) {
1620 		int argc = 0;
1621 		char *line, *argv[16] = {0}, **ap;
1622 
1623 		if ((line = read_line("kamiftp> ")) == NULL)
1624 			break;
1625 
1626 		for (argc = 0, ap = argv; ap < &argv[15] &&
1627 		    (*ap = strsep(&line, " \t")) != NULL;) {
1628 			if (**ap != '\0')
1629 				ap++, argc++;
1630 		}
1631 		excmd(argc, (const char **)argv);
1632 
1633 		if (bell) {
1634 			printf("\a");
1635 			fflush(stdout);
1636 		}
1637 
1638 		free(line);
1639 	}
1640 
1641 	printf("\n");
1642 }