Remove not needed void casts.
[dragonfly.git] / bin / rcp / rcp.c
CommitLineData
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1/*
2 * Copyright (c) 1983, 1990, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 2002 Networks Associates Technology, Inc.
5 * All rights reserved.
6 *
7 * Portions of this software were developed for the FreeBSD Project by
8 * ThinkSec AS and NAI Labs, the Security Research Division of Network
9 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
10 * ("CBOSS"), as part of the DARPA CHATS research program.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
1de703da
MD
39 *
40 * @(#) Copyright (c) 1983, 1990, 1992, 1993 The Regents of the University of California. All rights reserved.
41 * @(#)rcp.c 8.2 (Berkeley) 4/2/94
42 * $FreeBSD: src/bin/rcp/rcp.c,v 1.26.2.5 2002/08/16 20:06:34 ume Exp $
57fed2af 43 * $DragonFly: src/bin/rcp/rcp.c,v 1.4 2004/11/07 20:54:51 eirikn Exp $
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44 */
45
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46#include <sys/param.h>
47#include <sys/stat.h>
48#include <sys/time.h>
49#include <sys/socket.h>
50#include <netinet/in.h>
51#include <netinet/in_systm.h>
52#include <netinet/ip.h>
53
54#include <ctype.h>
55#include <dirent.h>
56#include <err.h>
57#include <errno.h>
58#include <fcntl.h>
59#include <libutil.h>
60#include <limits.h>
61#include <netdb.h>
62#include <paths.h>
63#include <pwd.h>
64#include <signal.h>
65#include <stdio.h>
66#include <stdlib.h>
67#include <string.h>
68#include <string.h>
69#include <unistd.h>
70
71#include "extern.h"
72
73#ifdef KERBEROS
74#include <openssl/des.h>
75#include <krb.h>
76#include "bsd_locl.h"
77
78char dst_realm_buf[REALM_SZ];
79char *dest_realm = NULL;
80int use_kerberos = 1;
81CREDENTIALS cred;
82Key_schedule schedule;
83extern char *krb_realmofhost();
84#ifdef CRYPT
85int doencrypt = 0;
86#define OPTIONS "46dfKk:prtx"
87#else
88#define OPTIONS "46dfKk:prt"
89#endif
90#else
91#define OPTIONS "46dfprt"
92#endif
93
94struct passwd *pwd;
95u_short port;
96uid_t userid;
97int errs, rem;
98int pflag, iamremote, iamrecursive, targetshouldbedirectory;
99int family = PF_UNSPEC;
100
101static int argc_copy;
102static char **argv_copy;
103
104#define CMDNEEDS 64
105char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
106
107#ifdef KERBEROS
108int kerberos(char **, char *, char *, char *);
109void oldw(const char *, ...) __printflike(1, 2);
110#endif
111int response(void);
112void rsource(char *, struct stat *);
113void run_err(const char *, ...) __printflike(1, 2);
114void sink(int, char *[]);
115void source(int, char *[]);
116void tolocal(int, char *[]);
117void toremote(char *, int, char *[]);
118void usage(void);
119
120int
121main(int argc, char *argv[])
122{
123 struct servent *sp;
124 int ch, fflag, i, tflag;
125 char *targ, *shell;
126#ifdef KERBEROS
127 char *k;
128#endif
129
130 /*
131 * Prepare for execing ourselves.
132 */
133 argc_copy = argc + 1;
134 argv_copy = malloc((argc_copy + 1) * sizeof(*argv_copy));
135 if (argv_copy == NULL)
136 err(1, "malloc");
137 argv_copy[0] = argv[0];
138 argv_copy[1] = "-K";
139 for (i = 1; i < argc; ++i) {
140 argv_copy[i + 1] = strdup(argv[i]);
141 if (argv_copy[i + 1] == NULL)
142 errx(1, "strdup: out of memory");
143 }
144 argv_copy[argc + 1] = NULL;
145
146 fflag = tflag = 0;
147 while ((ch = getopt(argc, argv, OPTIONS)) != -1)
148 switch(ch) { /* User-visible flags. */
149 case '4':
150 family = PF_INET;
151 break;
152
153 case '6':
154 family = PF_INET6;
155 break;
156
157 case 'K':
158#ifdef KERBEROS
159 use_kerberos = 0;
160#endif
161 break;
162#ifdef KERBEROS
163 case 'k':
164 dest_realm = dst_realm_buf;
57fed2af 165 strncpy(dst_realm_buf, optarg, REALM_SZ - 1);
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166 dst_realm_buf[REALM_SZ - 1] = '\0';
167 break;
168#ifdef CRYPT
169 case 'x':
170 doencrypt = 1;
171 /* des_set_key(cred.session, schedule); */
172 break;
173#endif
174#endif
175 case 'p':
176 pflag = 1;
177 break;
178 case 'r':
179 iamrecursive = 1;
180 break;
181 /* Server options. */
182 case 'd':
183 targetshouldbedirectory = 1;
184 break;
185 case 'f': /* "from" */
186 iamremote = 1;
187 fflag = 1;
188 break;
189 case 't': /* "to" */
190 iamremote = 1;
191 tflag = 1;
192 break;
193 case '?':
194 default:
195 usage();
196 }
197 argc -= optind;
198 argv += optind;
199
200#ifdef KERBEROS
201 k = auth_getval("auth_list");
202 if (k && !strstr(k, "kerberos"))
203 use_kerberos = 0;
204 if (use_kerberos) {
205#ifdef CRYPT
206 shell = doencrypt ? "ekshell" : "kshell";
207#else
208 shell = "kshell";
209#endif
210 if ((sp = getservbyname(shell, "tcp")) == NULL) {
211 use_kerberos = 0;
212 oldw("can't get entry for %s/tcp service", shell);
213 sp = getservbyname(shell = "shell", "tcp");
214 }
215 } else
216 sp = getservbyname(shell = "shell", "tcp");
217#else
218 sp = getservbyname(shell = "shell", "tcp");
219#endif
220 if (sp == NULL)
221 errx(1, "%s/tcp: unknown service", shell);
222 port = sp->s_port;
223
224 if ((pwd = getpwuid(userid = getuid())) == NULL)
225 errx(1, "unknown user %d", (int)userid);
226
227 rem = STDIN_FILENO; /* XXX */
228
229 if (fflag) { /* Follow "protocol", send data. */
57fed2af
EN
230 response();
231 setuid(userid);
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232 source(argc, argv);
233 exit(errs);
234 }
235
236 if (tflag) { /* Receive data. */
57fed2af 237 setuid(userid);
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238 sink(argc, argv);
239 exit(errs);
240 }
241
242 if (argc < 2)
243 usage();
244 if (argc > 2)
245 targetshouldbedirectory = 1;
246
247 rem = -1;
248 /* Command to be executed on remote system using "rsh". */
249#ifdef KERBEROS
57fed2af 250 snprintf(cmd, sizeof(cmd),
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251 "rcp%s%s%s%s", iamrecursive ? " -r" : "",
252#ifdef CRYPT
253 (doencrypt && use_kerberos ? " -x" : ""),
254#else
255 "",
256#endif
257 pflag ? " -p" : "", targetshouldbedirectory ? " -d" : "");
258#else
57fed2af 259 snprintf(cmd, sizeof(cmd), "rcp%s%s%s",
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260 iamrecursive ? " -r" : "", pflag ? " -p" : "",
261 targetshouldbedirectory ? " -d" : "");
262#endif
263
57fed2af 264 signal(SIGPIPE, lostconn);
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265
266 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
267 toremote(targ, argc, argv);
268 else {
269 tolocal(argc, argv); /* Dest is local host. */
270 if (targetshouldbedirectory)
271 verifydir(argv[argc - 1]);
272 }
273 exit(errs);
274}
275
276void
277toremote(char *targ, int argc, char *argv[])
278{
279 int i, len, tos;
280 char *bp, *host, *src, *suser, *thost, *tuser;
281
282 *targ++ = 0;
283 if (*targ == 0)
284 targ = ".";
285
286 if ((thost = strchr(argv[argc - 1], '@'))) {
287 /* user@host */
288 *thost++ = 0;
289 tuser = argv[argc - 1];
290 if (*tuser == '\0')
291 tuser = NULL;
292 else if (!okname(tuser))
293 exit(1);
294 } else {
295 thost = argv[argc - 1];
296 tuser = NULL;
297 }
298
299 for (i = 0; i < argc - 1; i++) {
300 src = colon(argv[i]);
301 if (src) { /* remote to remote */
302 *src++ = 0;
303 if (*src == 0)
304 src = ".";
305 host = strchr(argv[i], '@');
306 len = strlen(_PATH_RSH) + strlen(argv[i]) +
307 strlen(src) + (tuser ? strlen(tuser) : 0) +
308 strlen(thost) + strlen(targ) + CMDNEEDS + 20;
309 if (!(bp = malloc(len)))
310 err(1, "malloc");
311 if (host) {
312 *host++ = 0;
313 suser = argv[i];
314 if (*suser == '\0')
315 suser = pwd->pw_name;
316 else if (!okname(suser)) {
317 ++errs;
318 continue;
319 }
57fed2af 320 snprintf(bp, len,
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321 "%s %s -l %s -n %s %s '%s%s%s:%s'",
322 _PATH_RSH, host, suser, cmd, src,
323 tuser ? tuser : "", tuser ? "@" : "",
324 thost, targ);
325 } else
57fed2af 326 snprintf(bp, len,
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MD
327 "exec %s %s -n %s %s '%s%s%s:%s'",
328 _PATH_RSH, argv[i], cmd, src,
329 tuser ? tuser : "", tuser ? "@" : "",
330 thost, targ);
57fed2af
EN
331 susystem(bp, userid);
332 free(bp);
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333 } else { /* local to remote */
334 if (rem == -1) {
335 len = strlen(targ) + CMDNEEDS + 20;
336 if (!(bp = malloc(len)))
337 err(1, "malloc");
57fed2af 338 snprintf(bp, len, "%s -t %s", cmd, targ);
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339 host = thost;
340#ifdef KERBEROS
341 if (use_kerberos)
342 rem = kerberos(&host, bp,
343 pwd->pw_name,
344 tuser ? tuser : pwd->pw_name);
345 else
346#endif
347 rem = rcmd_af(&host, port,
348 pwd->pw_name,
349 tuser ? tuser : pwd->pw_name,
350 bp, 0, family);
351 if (rem < 0)
352 exit(1);
353 if (family == PF_INET) {
354 tos = IPTOS_THROUGHPUT;
355 if (setsockopt(rem, IPPROTO_IP, IP_TOS,
356 &tos, sizeof(int)) < 0)
357 warn("TOS (ignored)");
358 }
359 if (response() < 0)
360 exit(1);
57fed2af
EN
361 free(bp);
362 setuid(userid);
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MD
363 }
364 source(1, argv+i);
365 }
366 }
367}
368
369void
370tolocal(int argc, char *argv[])
371{
372 int i, len, tos;
373 char *bp, *host, *src, *suser;
374
375 for (i = 0; i < argc - 1; i++) {
376 if (!(src = colon(argv[i]))) { /* Local to local. */
377 len = strlen(_PATH_CP) + strlen(argv[i]) +
378 strlen(argv[argc - 1]) + 20;
379 if (!(bp = malloc(len)))
380 err(1, "malloc");
57fed2af 381 snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
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382 iamrecursive ? " -PR" : "", pflag ? " -p" : "",
383 argv[i], argv[argc - 1]);
384 if (susystem(bp, userid))
385 ++errs;
57fed2af 386 free(bp);
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387 continue;
388 }
389 *src++ = 0;
390 if (*src == 0)
391 src = ".";
392 if ((host = strchr(argv[i], '@')) == NULL) {
393 host = argv[i];
394 suser = pwd->pw_name;
395 } else {
396 *host++ = 0;
397 suser = argv[i];
398 if (*suser == '\0')
399 suser = pwd->pw_name;
400 else if (!okname(suser)) {
401 ++errs;
402 continue;
403 }
404 }
405 len = strlen(src) + CMDNEEDS + 20;
406 if ((bp = malloc(len)) == NULL)
407 err(1, "malloc");
57fed2af 408 snprintf(bp, len, "%s -f %s", cmd, src);
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MD
409 rem =
410#ifdef KERBEROS
411 use_kerberos ?
412 kerberos(&host, bp, pwd->pw_name, suser) :
413#endif
414 rcmd_af(&host, port, pwd->pw_name, suser, bp, 0,
415 family);
57fed2af 416 free(bp);
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MD
417 if (rem < 0) {
418 ++errs;
419 continue;
420 }
57fed2af 421 seteuid(userid);
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422 if (family == PF_INET) {
423 tos = IPTOS_THROUGHPUT;
424 if (setsockopt(rem, IPPROTO_IP, IP_TOS, &tos,
425 sizeof(int)) < 0)
426 warn("TOS (ignored)");
427 }
428 sink(1, argv + argc - 1);
57fed2af
EN
429 seteuid(0);
430 close(rem);
984263bc
MD
431 rem = -1;
432 }
433}
434
435void
436source(int argc, char *argv[])
437{
438 struct stat stb;
439 static BUF buffer;
440 BUF *bp;
441 off_t i;
442 int amt, fd, haderr, indx, result;
443 char *last, *name, buf[BUFSIZ];
444
445 for (indx = 0; indx < argc; ++indx) {
446 name = argv[indx];
447 if ((fd = open(name, O_RDONLY, 0)) < 0)
448 goto syserr;
449 if (fstat(fd, &stb)) {
450syserr: run_err("%s: %s", name, strerror(errno));
451 goto next;
452 }
453 switch (stb.st_mode & S_IFMT) {
454 case S_IFREG:
455 break;
456 case S_IFDIR:
457 if (iamrecursive) {
458 rsource(name, &stb);
459 goto next;
460 }
461 /* FALLTHROUGH */
462 default:
463 run_err("%s: not a regular file", name);
464 goto next;
465 }
466 if ((last = strrchr(name, '/')) == NULL)
467 last = name;
468 else
469 ++last;
470 if (pflag) {
471 /*
472 * Make it compatible with possible future
473 * versions expecting microseconds.
474 */
57fed2af 475 snprintf(buf, sizeof(buf), "T%ld 0 %ld 0\n",
984263bc
MD
476 (long)stb.st_mtimespec.tv_sec,
477 (long)stb.st_atimespec.tv_sec);
57fed2af 478 write(rem, buf, strlen(buf));
984263bc
MD
479 if (response() < 0)
480 goto next;
481 }
482#define MODEMASK (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO)
57fed2af 483 snprintf(buf, sizeof(buf), "C%04o %qd %s\n",
984263bc 484 stb.st_mode & MODEMASK, stb.st_size, last);
57fed2af 485 write(rem, buf, strlen(buf));
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MD
486 if (response() < 0)
487 goto next;
488 if ((bp = allocbuf(&buffer, fd, BUFSIZ)) == NULL) {
489next: (void)close(fd);
490 continue;
491 }
492
493 /* Keep writing after an error so that we stay sync'd up. */
494 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
495 amt = bp->cnt;
496 if (i + amt > stb.st_size)
497 amt = stb.st_size - i;
498 if (!haderr) {
499 result = read(fd, bp->buf, amt);
500 if (result != amt)
501 haderr = result >= 0 ? EIO : errno;
502 }
503 if (haderr)
57fed2af 504 write(rem, bp->buf, amt);
984263bc
MD
505 else {
506 result = write(rem, bp->buf, amt);
507 if (result != amt)
508 haderr = result >= 0 ? EIO : errno;
509 }
510 }
511 if (close(fd) && !haderr)
512 haderr = errno;
513 if (!haderr)
57fed2af 514 write(rem, "", 1);
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MD
515 else
516 run_err("%s: %s", name, strerror(haderr));
57fed2af 517 response();
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MD
518 }
519}
520
521void
522rsource(char *name, struct stat *statp)
523{
524 DIR *dirp;
525 struct dirent *dp;
526 char *last, *vect[1], path[PATH_MAX];
527
528 if (!(dirp = opendir(name))) {
529 run_err("%s: %s", name, strerror(errno));
530 return;
531 }
532 last = strrchr(name, '/');
533 if (last == 0)
534 last = name;
535 else
536 last++;
537 if (pflag) {
57fed2af 538 snprintf(path, sizeof(path), "T%ld 0 %ld 0\n",
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MD
539 (long)statp->st_mtimespec.tv_sec,
540 (long)statp->st_atimespec.tv_sec);
57fed2af 541 write(rem, path, strlen(path));
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MD
542 if (response() < 0) {
543 closedir(dirp);
544 return;
545 }
546 }
57fed2af 547 snprintf(path, sizeof(path),
984263bc 548 "D%04o %d %s\n", statp->st_mode & MODEMASK, 0, last);
57fed2af 549 write(rem, path, strlen(path));
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MD
550 if (response() < 0) {
551 closedir(dirp);
552 return;
553 }
554 while ((dp = readdir(dirp))) {
555 if (dp->d_ino == 0)
556 continue;
557 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
558 continue;
559 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path)) {
560 run_err("%s/%s: name too long", name, dp->d_name);
561 continue;
562 }
57fed2af 563 snprintf(path, sizeof(path), "%s/%s", name, dp->d_name);
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MD
564 vect[0] = path;
565 source(1, vect);
566 }
57fed2af
EN
567 closedir(dirp);
568 write(rem, "E\n", 2);
569 response();
984263bc
MD
570}
571
572void
573sink(int argc, char *argv[])
574{
575 static BUF buffer;
576 struct stat stb;
577 struct timeval tv[2];
578 enum { YES, NO, DISPLAYED } wrerr;
579 BUF *bp;
580 off_t i, j, size;
a78cd756
CP
581 size_t amt, count;
582 int exists, first, mask, mode, ofd, omode;
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MD
583 int setimes, targisdir, wrerrno = 0;
584 char ch, *cp, *np, *targ, *why, *vect[1], buf[BUFSIZ];
585
586#define atime tv[0]
587#define mtime tv[1]
588#define SCREWUP(str) { why = str; goto screwup; }
589
590 setimes = targisdir = 0;
591 mask = umask(0);
592 if (!pflag)
57fed2af 593 umask(mask);
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MD
594 if (argc != 1) {
595 run_err("ambiguous target");
596 exit(1);
597 }
598 targ = *argv;
599 if (targetshouldbedirectory)
600 verifydir(targ);
57fed2af 601 write(rem, "", 1);
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MD
602 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
603 targisdir = 1;
604 for (first = 1;; first = 0) {
605 cp = buf;
606 if (read(rem, cp, 1) <= 0)
607 return;
608 if (*cp++ == '\n')
609 SCREWUP("unexpected <newline>");
610 do {
611 if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
612 SCREWUP("lost connection");
613 *cp++ = ch;
614 } while (cp < &buf[BUFSIZ - 1] && ch != '\n');
615 *cp = 0;
616
617 if (buf[0] == '\01' || buf[0] == '\02') {
618 if (iamremote == 0)
57fed2af 619 write(STDERR_FILENO,
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MD
620 buf + 1, strlen(buf + 1));
621 if (buf[0] == '\02')
622 exit(1);
623 ++errs;
624 continue;
625 }
626 if (buf[0] == 'E') {
57fed2af 627 write(rem, "", 1);
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MD
628 return;
629 }
630
631 if (ch == '\n')
632 *--cp = 0;
633
634 cp = buf;
635 if (*cp == 'T') {
636 setimes++;
637 cp++;
638 mtime.tv_sec = strtol(cp, &cp, 10);
639 if (!cp || *cp++ != ' ')
640 SCREWUP("mtime.sec not delimited");
641 mtime.tv_usec = strtol(cp, &cp, 10);
642 if (!cp || *cp++ != ' ')
643 SCREWUP("mtime.usec not delimited");
644 atime.tv_sec = strtol(cp, &cp, 10);
645 if (!cp || *cp++ != ' ')
646 SCREWUP("atime.sec not delimited");
647 atime.tv_usec = strtol(cp, &cp, 10);
648 if (!cp || *cp++ != '\0')
649 SCREWUP("atime.usec not delimited");
57fed2af 650 write(rem, "", 1);
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MD
651 continue;
652 }
653 if (*cp != 'C' && *cp != 'D') {
654 /*
655 * Check for the case "rcp remote:foo\* local:bar".
656 * In this case, the line "No match." can be returned
657 * by the shell before the rcp command on the remote is
658 * executed so the ^Aerror_message convention isn't
659 * followed.
660 */
661 if (first) {
662 run_err("%s", cp);
663 exit(1);
664 }
665 SCREWUP("expected control record");
666 }
667 mode = 0;
668 for (++cp; cp < buf + 5; cp++) {
669 if (*cp < '0' || *cp > '7')
670 SCREWUP("bad mode");
671 mode = (mode << 3) | (*cp - '0');
672 }
673 if (*cp++ != ' ')
674 SCREWUP("mode not delimited");
675
676 for (size = 0; isdigit(*cp);)
677 size = size * 10 + (*cp++ - '0');
678 if (*cp++ != ' ')
679 SCREWUP("size not delimited");
680 if (targisdir) {
681 static char *namebuf = NULL;
682 static size_t cursize;
683 size_t need;
684
685 need = strlen(targ) + strlen(cp) + 250;
686 if (need > cursize) {
687 if (namebuf != NULL)
688 free(namebuf);
689 if (!(namebuf = malloc(need)))
690 run_err("%s", strerror(errno));
691 cursize = need;
692 }
57fed2af 693 snprintf(namebuf, need, "%s%s%s", targ,
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MD
694 *targ ? "/" : "", cp);
695 np = namebuf;
696 } else
697 np = targ;
698 exists = stat(np, &stb) == 0;
699 if (buf[0] == 'D') {
700 int mod_flag = pflag;
701 if (exists) {
702 if (!S_ISDIR(stb.st_mode)) {
703 errno = ENOTDIR;
704 goto bad;
705 }
706 if (pflag)
57fed2af 707 chmod(np, mode);
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MD
708 } else {
709 /* Handle copying from a read-only directory */
710 mod_flag = 1;
711 if (mkdir(np, mode | S_IRWXU) < 0)
712 goto bad;
713 }
714 vect[0] = np;
715 sink(1, vect);
716 if (setimes) {
717 setimes = 0;
718 if (utimes(np, tv) < 0)
719 run_err("%s: set times: %s",
720 np, strerror(errno));
721 }
722 if (mod_flag)
57fed2af 723 chmod(np, mode);
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MD
724 continue;
725 }
726 omode = mode;
727 mode |= S_IWRITE;
728 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
729bad: run_err("%s: %s", np, strerror(errno));
730 continue;
731 }
57fed2af 732 write(rem, "", 1);
984263bc 733 if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) {
57fed2af 734 close(ofd);
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MD
735 continue;
736 }
737 cp = bp->buf;
738 wrerr = NO;
739 for (count = i = 0; i < size; i += BUFSIZ) {
740 amt = BUFSIZ;
741 if (i + amt > size)
742 amt = size - i;
743 count += amt;
744 do {
745 j = read(rem, cp, amt);
746 if (j <= 0) {
747 run_err("%s", j ? strerror(errno) :
748 "dropped connection");
749 exit(1);
750 }
751 amt -= j;
752 cp += j;
753 } while (amt > 0);
754 if (count == bp->cnt) {
755 /* Keep reading so we stay sync'd up. */
756 if (wrerr == NO) {
757 j = write(ofd, bp->buf, count);
758 if (j != count) {
759 wrerr = YES;
760 wrerrno = j >= 0 ? EIO : errno;
761 }
762 }
763 count = 0;
764 cp = bp->buf;
765 }
766 }
767 if (count != 0 && wrerr == NO &&
768 (j = write(ofd, bp->buf, count)) != count) {
769 wrerr = YES;
770 wrerrno = j >= 0 ? EIO : errno;
771 }
772 if (ftruncate(ofd, size)) {
773 run_err("%s: truncate: %s", np, strerror(errno));
774 wrerr = DISPLAYED;
775 }
776 if (pflag) {
777 if (exists || omode != mode)
778 if (fchmod(ofd, omode))
779 run_err("%s: set mode: %s",
780 np, strerror(errno));
781 } else {
782 if (!exists && omode != mode)
783 if (fchmod(ofd, omode & ~mask))
784 run_err("%s: set mode: %s",
785 np, strerror(errno));
786 }
57fed2af
EN
787 close(ofd);
788 response();
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MD
789 if (setimes && wrerr == NO) {
790 setimes = 0;
791 if (utimes(np, tv) < 0) {
792 run_err("%s: set times: %s",
793 np, strerror(errno));
794 wrerr = DISPLAYED;
795 }
796 }
797 switch(wrerr) {
798 case YES:
799 run_err("%s: %s", np, strerror(wrerrno));
800 break;
801 case NO:
57fed2af 802 write(rem, "", 1);
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MD
803 break;
804 case DISPLAYED:
805 break;
806 }
807 }
808screwup:
809 run_err("protocol error: %s", why);
810 exit(1);
811}
812
813#ifdef KERBEROS
814int
815kerberos(char **host, char *bp, char *locuser, char *user)
816{
817 if (use_kerberos) {
818 setuid(getuid());
819 rem = KSUCCESS;
820 errno = 0;
821 if (dest_realm == NULL)
822 dest_realm = krb_realmofhost(*host);
823 rem =
824#ifdef CRYPT
825 doencrypt ?
826 krcmd_mutual(host,
827 port, user, bp, 0, dest_realm, &cred, schedule) :
828#endif
829 krcmd(host, port, user, bp, 0, dest_realm);
830
831 if (rem < 0) {
832 if (errno == ECONNREFUSED)
833 oldw("remote host doesn't support Kerberos");
834 else if (errno == ENOENT)
835 oldw("can't provide Kerberos authentication data");
836 execv(_PATH_RCP, argv_copy);
837 err(1, "execv: %s", _PATH_RCP);
838 }
839 } else {
840#ifdef CRYPT
841 if (doencrypt)
842 errx(1,
843 "the -x option requires Kerberos authentication");
844#endif
845 rem = rcmd_af(host, port, locuser, user, bp, 0, family);
846 }
847 return (rem);
848}
849#endif /* KERBEROS */
850
851int
852response(void)
853{
854 char ch, *cp, resp, rbuf[BUFSIZ];
855
856 if (read(rem, &resp, sizeof(resp)) != sizeof(resp))
857 lostconn(0);
858
859 cp = rbuf;
860 switch(resp) {
861 case 0: /* ok */
862 return (0);
863 default:
864 *cp++ = resp;
865 /* FALLTHROUGH */
866 case 1: /* error, followed by error msg */
867 case 2: /* fatal error, "" */
868 do {
869 if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
870 lostconn(0);
871 *cp++ = ch;
872 } while (cp < &rbuf[BUFSIZ] && ch != '\n');
873
874 if (!iamremote)
57fed2af 875 write(STDERR_FILENO, rbuf, cp - rbuf);
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MD
876 ++errs;
877 if (resp == 1)
878 return (-1);
879 exit(1);
880 }
881 /* NOTREACHED */
882}
883
884void
885usage(void)
886{
887#ifdef KERBEROS
888#ifdef CRYPT
57fed2af 889 fprintf(stderr, "%s\n%s\n",
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MD
890 "usage: rcp [-46Kpx] [-k realm] f1 f2",
891 " rcp [-46Kprx] [-k realm] f1 ... fn directory");
892#else
57fed2af 893 fprintf(stderr, "%s\n%s\n",
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MD
894 "usage: rcp [-46Kp] [-k realm] f1 f2",
895 " rcp [-46Kpr] [-k realm] f1 ... fn directory");
896#endif
897#else
57fed2af 898 fprintf(stderr, "%s\n%s\n",
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MD
899 "usage: rcp [-46p] f1 f2",
900 " rcp [-46pr] f1 ... fn directory");
901#endif
902 exit(1);
903}
904
905#include <stdarg.h>
906
907#ifdef KERBEROS
908void
909oldw(const char *fmt, ...)
910{
911 va_list ap;
912 va_start(ap, fmt);
57fed2af
EN
913 fprintf(stderr, "rcp: ");
914 vfprintf(stderr, fmt, ap);
915 fprintf(stderr, ", using standard rcp\n");
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916 va_end(ap);
917}
918#endif
919
920void
921run_err(const char *fmt, ...)
922{
923 static FILE *fp;
924 va_list ap;
925 va_start(ap, fmt);
926
927 ++errs;
928 if (fp == NULL && !(fp = fdopen(rem, "w")))
929 return;
57fed2af
EN
930 fprintf(fp, "%c", 0x01);
931 fprintf(fp, "rcp: ");
932 vfprintf(fp, fmt, ap);
933 fprintf(fp, "\n");
934 fflush(fp);
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935
936 if (!iamremote)
937 vwarnx(fmt, ap);
938
939 va_end(ap);
940}