1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <stdint.h>
32 #include <fcntl.h>
33 #include <unistd.h>
34 #include <string.h>
35 #include <ctype.h>
36 #include <inttypes.h>
37 #include <libgen.h>
38 #include <pthread.h>
39 #include <signal.h>
40 #include <err.h>
41 #include <errno.h>
42 #include <assert.h>
43
44 #include <sys/param.h>
45 #include <sys/ioctl.h>
46 #include <sys/socket.h>
47 #include <sys/sysctl.h>
48 #include <sys/syslog.h>
49 #include <sys/time.h>
50 #include <sys/bio.h>
51 #include <netinet/in.h>
52 #include <netinet/tcp.h>
53 #include <arpa/inet.h>
54
55 #include <geom/gate/g_gate.h>
56 #include "ggate.h"
57
58
59 static enum { UNSET, CREATE, DESTROY, LIST, RESCUE } action = UNSET;
60
61 static const char *path = NULL;
62 static const char *host = NULL;
63 static int unit = G_GATE_UNIT_AUTO;
64 static unsigned flags = 0;
65 static int force = 0;
66 static unsigned queue_size = G_GATE_QUEUE_SIZE;
67 static unsigned port = G_GATE_PORT;
68 static off_t mediasize;
69 static unsigned sectorsize = 0;
70 static unsigned timeout = G_GATE_TIMEOUT;
71 static int sendfd, recvfd;
72 static uint32_t token;
73 static pthread_t sendtd, recvtd;
74 static int reconnect;
75 static int initialbuffersize = 131072;
76
77 static void
usage(void)78 usage(void)
79 {
80
81 fprintf(stderr, "usage: %s create [-nv] [-o <ro|wo|rw>] [-p port] "
82 "[-q queue_size] [-R rcvbuf] [-S sndbuf] [-s sectorsize] "
83 "[-t timeout] [-u unit] <host> <path>\n", getprogname());
84 fprintf(stderr, " %s rescue [-nv] [-o <ro|wo|rw>] [-p port] "
85 "[-R rcvbuf] [-S sndbuf] <-u unit> <host> <path>\n", getprogname());
86 fprintf(stderr, " %s destroy [-f] <-u unit>\n", getprogname());
87 fprintf(stderr, " %s list [-v] [-u unit]\n", getprogname());
88 exit(EXIT_FAILURE);
89 }
90
91 static void *
send_thread(void * arg __unused)92 send_thread(void *arg __unused)
93 {
94 struct g_gate_ctl_io ggio;
95 struct g_gate_hdr hdr;
96 size_t buf_capacity;
97 ssize_t numbytesprocd;
98 int error;
99 char *newbuf;
100
101 g_gate_log(LOG_NOTICE, "%s: started!", __func__);
102
103 buf_capacity = initialbuffersize;
104
105 ggio.gctl_version = G_GATE_VERSION;
106 ggio.gctl_unit = unit;
107 ggio.gctl_data = malloc(buf_capacity);
108 if (ggio.gctl_data == NULL) {
109 g_gate_log(LOG_ERR, "%s: Cannot alloc buffer.", __func__);
110 pthread_exit(NULL);
111 }
112
113 for (;;) {
114 ggio.gctl_length = buf_capacity;
115 ggio.gctl_error = 0;
116 g_gate_ioctl(G_GATE_CMD_START, &ggio);
117 error = ggio.gctl_error;
118 switch (error) {
119 case 0:
120 break;
121 case ECANCELED:
122 if (reconnect)
123 break;
124 /* Exit gracefully. */
125 g_gate_close_device();
126 exit(EXIT_SUCCESS);
127
128 case ENOMEM:
129 {
130 /* Buffer too small. */
131 g_gate_log(LOG_DEBUG, "buffer too small. new size: %u",
132 ggio.gctl_length);
133 newbuf = malloc(ggio.gctl_length);
134 if (newbuf != NULL) {
135 free(ggio.gctl_data);
136 ggio.gctl_data = newbuf;
137 buf_capacity = ggio.gctl_length;
138 continue;
139 }
140 /* FALLTHROUGH */
141 }
142
143 case ENXIO:
144 default:
145 g_gate_xlog("ioctl(/dev/%s): %s.", G_GATE_CTL_NAME,
146 strerror(error));
147 }
148
149 if (reconnect)
150 break;
151
152 switch (ggio.gctl_cmd) {
153 case BIO_READ:
154 hdr.gh_cmd = GGATE_CMD_READ;
155 break;
156 case BIO_WRITE:
157 hdr.gh_cmd = GGATE_CMD_WRITE;
158 break;
159 case BIO_FLUSH:
160 hdr.gh_cmd = GGATE_CMD_FLUSH;
161 break;
162 default:
163 g_gate_log(LOG_NOTICE, "Unknown gctl_cmd: %i",
164 ggio.gctl_cmd);
165 ggio.gctl_error = EOPNOTSUPP;
166 g_gate_ioctl(G_GATE_CMD_DONE, &ggio);
167 continue;
168 }
169
170 hdr.gh_seq = ggio.gctl_seq;
171 hdr.gh_offset = ggio.gctl_offset;
172 hdr.gh_length = ggio.gctl_length;
173 hdr.gh_error = 0;
174 g_gate_swap2n_hdr(&hdr);
175
176 numbytesprocd = g_gate_send(sendfd, &hdr, sizeof(hdr), MSG_NOSIGNAL);
177 g_gate_log(LOG_DEBUG, "Sent hdr packet.");
178 g_gate_swap2h_hdr(&hdr);
179 if (reconnect)
180 break;
181 if (numbytesprocd != sizeof(hdr)) {
182 g_gate_log(LOG_ERR, "Lost connection 1.");
183 reconnect = 1;
184 pthread_kill(recvtd, SIGUSR1);
185 break;
186 }
187
188 if (hdr.gh_cmd == GGATE_CMD_WRITE) {
189 numbytesprocd = g_gate_send(sendfd, ggio.gctl_data,
190 ggio.gctl_length, MSG_NOSIGNAL);
191 if (reconnect)
192 break;
193 if (numbytesprocd != ggio.gctl_length) {
194 g_gate_log(LOG_ERR, "Lost connection 2 (%zd != %zd).",
195 numbytesprocd, (ssize_t)ggio.gctl_length);
196 reconnect = 1;
197 pthread_kill(recvtd, SIGUSR1);
198 break;
199 }
200 g_gate_log(LOG_DEBUG, "Sent %zd bytes (offset=%"
201 PRIu64 ", length=%" PRIu32 ").", numbytesprocd,
202 hdr.gh_offset, hdr.gh_length);
203 }
204 }
205 g_gate_log(LOG_DEBUG, "%s: Died.", __func__);
206 return (NULL);
207 }
208
209 static void *
recv_thread(void * arg __unused)210 recv_thread(void *arg __unused)
211 {
212 struct g_gate_ctl_io ggio;
213 struct g_gate_hdr hdr;
214 ssize_t buf_capacity;
215 ssize_t numbytesprocd;
216 char *newbuf;
217
218 g_gate_log(LOG_NOTICE, "%s: started!", __func__);
219
220 buf_capacity = initialbuffersize;
221
222 ggio.gctl_version = G_GATE_VERSION;
223 ggio.gctl_unit = unit;
224 ggio.gctl_data = malloc(buf_capacity);
225 if (ggio.gctl_data == NULL) {
226 g_gate_log(LOG_ERR, "%s: Cannot alloc buffer.", __func__);
227 pthread_exit(NULL);
228 }
229
230 for (;;) {
231 numbytesprocd = g_gate_recv(recvfd, &hdr, sizeof(hdr), MSG_WAITALL);
232 if (reconnect)
233 break;
234 g_gate_swap2h_hdr(&hdr);
235 if (numbytesprocd != sizeof(hdr)) {
236 if (numbytesprocd == -1 && errno == EAGAIN)
237 continue;
238 g_gate_log(LOG_ERR, "Lost connection 3.");
239 reconnect = 1;
240 pthread_kill(sendtd, SIGUSR1);
241 break;
242 }
243 g_gate_log(LOG_DEBUG, "Received hdr packet.");
244
245 ggio.gctl_seq = hdr.gh_seq;
246 ggio.gctl_cmd = hdr.gh_cmd;
247 ggio.gctl_offset = hdr.gh_offset;
248 ggio.gctl_length = hdr.gh_length;
249 ggio.gctl_error = hdr.gh_error;
250
251 if (ggio.gctl_length > buf_capacity) {
252 newbuf = malloc(ggio.gctl_length);
253 if (newbuf != NULL) {
254 free(ggio.gctl_data);
255 ggio.gctl_data = newbuf;
256 buf_capacity = ggio.gctl_length;
257 } else {
258 g_gate_log(LOG_ERR, "Received too big response: %zd",
259 ggio.gctl_length);
260 break;
261 }
262 }
263
264 if (ggio.gctl_error == 0 && ggio.gctl_cmd == GGATE_CMD_READ) {
265 numbytesprocd = g_gate_recv(recvfd, ggio.gctl_data,
266 ggio.gctl_length, MSG_WAITALL);
267 if (reconnect)
268 break;
269 g_gate_log(LOG_DEBUG, "Received data packet.");
270 if (numbytesprocd != ggio.gctl_length) {
271 g_gate_log(LOG_ERR, "Lost connection 4.");
272 reconnect = 1;
273 pthread_kill(sendtd, SIGUSR1);
274 break;
275 }
276 g_gate_log(LOG_DEBUG, "Received %d bytes (offset=%"
277 PRIu64 ", length=%" PRIu32 ").", numbytesprocd,
278 hdr.gh_offset, hdr.gh_length);
279 }
280
281 g_gate_ioctl(G_GATE_CMD_DONE, &ggio);
282 }
283 g_gate_log(LOG_DEBUG, "%s: Died.", __func__);
284 pthread_exit(NULL);
285 }
286
287 static int
handshake(int dir)288 handshake(int dir)
289 {
290 struct g_gate_version ver;
291 struct g_gate_cinit cinit;
292 struct g_gate_sinit sinit;
293 struct sockaddr_in serv;
294 int sfd;
295
296 /*
297 * Do the network stuff.
298 */
299 bzero(&serv, sizeof(serv));
300 serv.sin_family = AF_INET;
301 serv.sin_addr.s_addr = g_gate_str2ip(host);
302 if (serv.sin_addr.s_addr == INADDR_NONE) {
303 g_gate_log(LOG_DEBUG, "Invalid IP/host name: %s.", host);
304 return (-1);
305 }
306 serv.sin_port = htons(port);
307 sfd = socket(AF_INET, SOCK_STREAM, 0);
308 if (sfd == -1) {
309 g_gate_log(LOG_DEBUG, "Cannot open socket: %s.",
310 strerror(errno));
311 return (-1);
312 }
313
314 g_gate_socket_settings(sfd);
315
316 if (connect(sfd, (struct sockaddr *)&serv, sizeof(serv)) == -1) {
317 g_gate_log(LOG_DEBUG, "Cannot connect to server: %s.",
318 strerror(errno));
319 close(sfd);
320 return (-1);
321 }
322
323 g_gate_log(LOG_INFO, "Connected to the server: %s:%d.", host, port);
324
325 /*
326 * Create and send version packet.
327 */
328 g_gate_log(LOG_DEBUG, "Sending version packet.");
329 assert(strlen(GGATE_MAGIC) == sizeof(ver.gv_magic));
330 bcopy(GGATE_MAGIC, ver.gv_magic, sizeof(ver.gv_magic));
331 ver.gv_version = GGATE_VERSION;
332 ver.gv_error = 0;
333 g_gate_swap2n_version(&ver);
334 if (g_gate_send(sfd, &ver, sizeof(ver), MSG_NOSIGNAL) == -1) {
335 g_gate_log(LOG_DEBUG, "Error while sending version packet: %s.",
336 strerror(errno));
337 close(sfd);
338 return (-1);
339 }
340 bzero(&ver, sizeof(ver));
341 if (g_gate_recv(sfd, &ver, sizeof(ver), MSG_WAITALL) == -1) {
342 g_gate_log(LOG_DEBUG, "Error while receiving data: %s.",
343 strerror(errno));
344 close(sfd);
345 return (-1);
346 }
347 if (ver.gv_error != 0) {
348 g_gate_log(LOG_DEBUG, "Version verification problem: %s.",
349 strerror(errno));
350 close(sfd);
351 return (-1);
352 }
353
354 /*
355 * Create and send initial packet.
356 */
357 g_gate_log(LOG_DEBUG, "Sending initial packet.");
358 if (strlcpy(cinit.gc_path, path, sizeof(cinit.gc_path)) >=
359 sizeof(cinit.gc_path)) {
360 g_gate_log(LOG_DEBUG, "Path name too long.");
361 close(sfd);
362 return (-1);
363 }
364 cinit.gc_flags = flags | dir;
365 cinit.gc_token = token;
366 cinit.gc_nconn = 2;
367 g_gate_swap2n_cinit(&cinit);
368 if (g_gate_send(sfd, &cinit, sizeof(cinit), MSG_NOSIGNAL) == -1) {
369 g_gate_log(LOG_DEBUG, "Error while sending initial packet: %s.",
370 strerror(errno));
371 close(sfd);
372 return (-1);
373 }
374 g_gate_swap2h_cinit(&cinit);
375
376 /*
377 * Receiving initial packet from server.
378 */
379 g_gate_log(LOG_DEBUG, "Receiving initial packet.");
380 if (g_gate_recv(sfd, &sinit, sizeof(sinit), MSG_WAITALL) == -1) {
381 g_gate_log(LOG_DEBUG, "Error while receiving data: %s.",
382 strerror(errno));
383 close(sfd);
384 return (-1);
385 }
386 g_gate_swap2h_sinit(&sinit);
387 if (sinit.gs_error != 0) {
388 g_gate_log(LOG_DEBUG, "Error from server: %s.",
389 strerror(sinit.gs_error));
390 close(sfd);
391 return (-1);
392 }
393 g_gate_log(LOG_DEBUG, "Received initial packet.");
394
395 mediasize = sinit.gs_mediasize;
396 if (sectorsize == 0)
397 sectorsize = sinit.gs_sectorsize;
398
399 return (sfd);
400 }
401
402 static void
mydaemon(void)403 mydaemon(void)
404 {
405
406 if (g_gate_verbose > 0)
407 return;
408 if (daemon(0, 0) == 0)
409 return;
410 if (action == CREATE)
411 g_gate_destroy(unit, 1);
412 err(EXIT_FAILURE, "Cannot daemonize");
413 }
414
415 static int
g_gatec_connect(void)416 g_gatec_connect(void)
417 {
418
419 token = arc4random();
420 /*
421 * Our receive descriptor is connected to the send descriptor on the
422 * server side.
423 */
424 recvfd = handshake(GGATE_FLAG_SEND);
425 if (recvfd == -1)
426 return (0);
427 /*
428 * Our send descriptor is connected to the receive descriptor on the
429 * server side.
430 */
431 sendfd = handshake(GGATE_FLAG_RECV);
432 if (sendfd == -1)
433 return (0);
434 return (1);
435 }
436
437 static void
g_gatec_start(void)438 g_gatec_start(void)
439 {
440 int error;
441
442 reconnect = 0;
443 error = pthread_create(&recvtd, NULL, recv_thread, NULL);
444 if (error != 0) {
445 g_gate_destroy(unit, 1);
446 g_gate_xlog("pthread_create(recv_thread): %s.",
447 strerror(error));
448 }
449 sendtd = pthread_self();
450 send_thread(NULL);
451 /* Disconnected. */
452 close(sendfd);
453 close(recvfd);
454 }
455
456 static void
signop(int sig __unused)457 signop(int sig __unused)
458 {
459
460 /* Do nothing. */
461 }
462
463 static void
g_gatec_loop(void)464 g_gatec_loop(void)
465 {
466 struct g_gate_ctl_cancel ggioc;
467
468 signal(SIGUSR1, signop);
469 for (;;) {
470 g_gatec_start();
471 g_gate_log(LOG_NOTICE, "Disconnected [%s %s]. Connecting...",
472 host, path);
473 while (!g_gatec_connect()) {
474 sleep(2);
475 g_gate_log(LOG_NOTICE, "Connecting [%s %s]...", host,
476 path);
477 }
478 ggioc.gctl_version = G_GATE_VERSION;
479 ggioc.gctl_unit = unit;
480 ggioc.gctl_seq = 0;
481 g_gate_ioctl(G_GATE_CMD_CANCEL, &ggioc);
482 }
483 }
484
485 static void
g_gatec_create(void)486 g_gatec_create(void)
487 {
488 struct g_gate_ctl_create ggioc;
489
490 if (!g_gatec_connect())
491 g_gate_xlog("Cannot connect: %s.", strerror(errno));
492
493 /*
494 * Ok, got both sockets, time to create provider.
495 */
496 memset(&ggioc, 0, sizeof(ggioc));
497 ggioc.gctl_version = G_GATE_VERSION;
498 ggioc.gctl_mediasize = mediasize;
499 ggioc.gctl_sectorsize = sectorsize;
500 ggioc.gctl_flags = flags;
501 ggioc.gctl_maxcount = queue_size;
502 ggioc.gctl_timeout = timeout;
503 ggioc.gctl_unit = unit;
504 snprintf(ggioc.gctl_info, sizeof(ggioc.gctl_info), "%s:%u %s", host,
505 port, path);
506 g_gate_ioctl(G_GATE_CMD_CREATE, &ggioc);
507 if (unit == -1) {
508 printf("%s%u\n", G_GATE_PROVIDER_NAME, ggioc.gctl_unit);
509 fflush(stdout);
510 }
511 unit = ggioc.gctl_unit;
512
513 mydaemon();
514 g_gatec_loop();
515 }
516
517 static void
g_gatec_rescue(void)518 g_gatec_rescue(void)
519 {
520 struct g_gate_ctl_cancel ggioc;
521
522 if (!g_gatec_connect())
523 g_gate_xlog("Cannot connect: %s.", strerror(errno));
524
525 ggioc.gctl_version = G_GATE_VERSION;
526 ggioc.gctl_unit = unit;
527 ggioc.gctl_seq = 0;
528 g_gate_ioctl(G_GATE_CMD_CANCEL, &ggioc);
529
530 mydaemon();
531 g_gatec_loop();
532 }
533
534 static void
init_initial_buffer_size(void)535 init_initial_buffer_size(void)
536 {
537 int value;
538 size_t intsize;
539 intsize = sizeof(initialbuffersize);
540 if (sysctlbyname("kern.maxphys", &value, &intsize, NULL, 0) == 0)
541 initialbuffersize = value;
542 }
543
544 int
main(int argc,char * argv[])545 main(int argc, char *argv[])
546 {
547
548 if (argc < 2)
549 usage();
550 if (strcasecmp(argv[1], "create") == 0)
551 action = CREATE;
552 else if (strcasecmp(argv[1], "destroy") == 0)
553 action = DESTROY;
554 else if (strcasecmp(argv[1], "list") == 0)
555 action = LIST;
556 else if (strcasecmp(argv[1], "rescue") == 0)
557 action = RESCUE;
558 else
559 usage();
560 argc -= 1;
561 argv += 1;
562 for (;;) {
563 int ch;
564
565 ch = getopt(argc, argv, "fno:p:q:R:S:s:t:u:v");
566 if (ch == -1)
567 break;
568 switch (ch) {
569 case 'f':
570 if (action != DESTROY)
571 usage();
572 force = 1;
573 break;
574 case 'n':
575 if (action != CREATE && action != RESCUE)
576 usage();
577 nagle = 0;
578 break;
579 case 'o':
580 if (action != CREATE && action != RESCUE)
581 usage();
582 if (strcasecmp("ro", optarg) == 0)
583 flags = G_GATE_FLAG_READONLY;
584 else if (strcasecmp("wo", optarg) == 0)
585 flags = G_GATE_FLAG_WRITEONLY;
586 else if (strcasecmp("rw", optarg) == 0)
587 flags = 0;
588 else {
589 errx(EXIT_FAILURE,
590 "Invalid argument for '-o' option.");
591 }
592 break;
593 case 'p':
594 if (action != CREATE && action != RESCUE)
595 usage();
596 errno = 0;
597 port = strtoul(optarg, NULL, 10);
598 if (port == 0 && errno != 0)
599 errx(EXIT_FAILURE, "Invalid port.");
600 break;
601 case 'q':
602 if (action != CREATE)
603 usage();
604 errno = 0;
605 queue_size = strtoul(optarg, NULL, 10);
606 if (queue_size == 0 && errno != 0)
607 errx(EXIT_FAILURE, "Invalid queue_size.");
608 break;
609 case 'R':
610 if (action != CREATE && action != RESCUE)
611 usage();
612 errno = 0;
613 rcvbuf = strtoul(optarg, NULL, 10);
614 if (rcvbuf == 0 && errno != 0)
615 errx(EXIT_FAILURE, "Invalid rcvbuf.");
616 break;
617 case 'S':
618 if (action != CREATE && action != RESCUE)
619 usage();
620 errno = 0;
621 sndbuf = strtoul(optarg, NULL, 10);
622 if (sndbuf == 0 && errno != 0)
623 errx(EXIT_FAILURE, "Invalid sndbuf.");
624 break;
625 case 's':
626 if (action != CREATE)
627 usage();
628 errno = 0;
629 sectorsize = strtoul(optarg, NULL, 10);
630 if (sectorsize == 0 && errno != 0)
631 errx(EXIT_FAILURE, "Invalid sectorsize.");
632 break;
633 case 't':
634 if (action != CREATE)
635 usage();
636 errno = 0;
637 timeout = strtoul(optarg, NULL, 10);
638 if (timeout == 0 && errno != 0)
639 errx(EXIT_FAILURE, "Invalid timeout.");
640 break;
641 case 'u':
642 errno = 0;
643 unit = strtol(optarg, NULL, 10);
644 if (unit == 0 && errno != 0)
645 errx(EXIT_FAILURE, "Invalid unit number.");
646 break;
647 case 'v':
648 if (action == DESTROY)
649 usage();
650 g_gate_verbose++;
651 break;
652 default:
653 usage();
654 }
655 }
656 argc -= optind;
657 argv += optind;
658
659 init_initial_buffer_size();
660
661 switch (action) {
662 case CREATE:
663 if (argc != 2)
664 usage();
665 g_gate_load_module();
666 g_gate_open_device();
667 host = argv[0];
668 path = argv[1];
669 g_gatec_create();
670 break;
671 case DESTROY:
672 if (unit == -1) {
673 fprintf(stderr, "Required unit number.\n");
674 usage();
675 }
676 g_gate_verbose = 1;
677 g_gate_open_device();
678 g_gate_destroy(unit, force);
679 break;
680 case LIST:
681 g_gate_list(unit, g_gate_verbose);
682 break;
683 case RESCUE:
684 if (argc != 2)
685 usage();
686 if (unit == -1) {
687 fprintf(stderr, "Required unit number.\n");
688 usage();
689 }
690 g_gate_open_device();
691 host = argv[0];
692 path = argv[1];
693 g_gatec_rescue();
694 break;
695 case UNSET:
696 default:
697 usage();
698 }
699 g_gate_close_device();
700 exit(EXIT_SUCCESS);
701 }
702