Remove some unnecessary inclusions of <sys/cdefs.h> across the tree.
[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
a17407d2 42 * $FreeBSD: src/bin/rcp/rcp.c,v 1.26.2.6 2004/09/16 12:16:10 delphij Exp $
984263bc
MD
43 */
44
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45#include <sys/param.h>
46#include <sys/stat.h>
47#include <sys/time.h>
48#include <sys/socket.h>
49#include <netinet/in.h>
50#include <netinet/in_systm.h>
51#include <netinet/ip.h>
52
53#include <ctype.h>
54#include <dirent.h>
55#include <err.h>
56#include <errno.h>
57#include <fcntl.h>
58#include <libutil.h>
59#include <limits.h>
60#include <netdb.h>
61#include <paths.h>
62#include <pwd.h>
63#include <signal.h>
64#include <stdio.h>
65#include <stdlib.h>
66#include <string.h>
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67#include <unistd.h>
68
69#include "extern.h"
70
71#ifdef KERBEROS
72#include <openssl/des.h>
73#include <krb.h>
74#include "bsd_locl.h"
75
76char dst_realm_buf[REALM_SZ];
77char *dest_realm = NULL;
78int use_kerberos = 1;
79CREDENTIALS cred;
80Key_schedule schedule;
81extern char *krb_realmofhost();
82#ifdef CRYPT
83int doencrypt = 0;
84#define OPTIONS "46dfKk:prtx"
85#else
86#define OPTIONS "46dfKk:prt"
87#endif
88#else
89#define OPTIONS "46dfprt"
90#endif
91
92struct passwd *pwd;
93u_short port;
94uid_t userid;
95int errs, rem;
96int pflag, iamremote, iamrecursive, targetshouldbedirectory;
97int family = PF_UNSPEC;
98
99static int argc_copy;
100static char **argv_copy;
101
102#define CMDNEEDS 64
103char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
104
105#ifdef KERBEROS
106int kerberos(char **, char *, char *, char *);
107void oldw(const char *, ...) __printflike(1, 2);
108#endif
109int response(void);
110void rsource(char *, struct stat *);
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111void sink(int, char *[]);
112void source(int, char *[]);
113void tolocal(int, char *[]);
114void toremote(char *, int, char *[]);
115void usage(void);
116
117int
118main(int argc, char *argv[])
119{
120 struct servent *sp;
121 int ch, fflag, i, tflag;
122 char *targ, *shell;
123#ifdef KERBEROS
124 char *k;
125#endif
126
127 /*
128 * Prepare for execing ourselves.
129 */
130 argc_copy = argc + 1;
131 argv_copy = malloc((argc_copy + 1) * sizeof(*argv_copy));
132 if (argv_copy == NULL)
133 err(1, "malloc");
134 argv_copy[0] = argv[0];
c5fe5fd1 135 argv_copy[1] = __DECONST(char *, "-K");
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136 for (i = 1; i < argc; ++i) {
137 argv_copy[i + 1] = strdup(argv[i]);
138 if (argv_copy[i + 1] == NULL)
139 errx(1, "strdup: out of memory");
140 }
141 argv_copy[argc + 1] = NULL;
142
143 fflag = tflag = 0;
144 while ((ch = getopt(argc, argv, OPTIONS)) != -1)
145 switch(ch) { /* User-visible flags. */
146 case '4':
147 family = PF_INET;
148 break;
149
150 case '6':
151 family = PF_INET6;
152 break;
153
154 case 'K':
155#ifdef KERBEROS
156 use_kerberos = 0;
157#endif
158 break;
159#ifdef KERBEROS
160 case 'k':
161 dest_realm = dst_realm_buf;
57fed2af 162 strncpy(dst_realm_buf, optarg, REALM_SZ - 1);
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163 dst_realm_buf[REALM_SZ - 1] = '\0';
164 break;
165#ifdef CRYPT
166 case 'x':
167 doencrypt = 1;
168 /* des_set_key(cred.session, schedule); */
169 break;
170#endif
171#endif
172 case 'p':
173 pflag = 1;
174 break;
175 case 'r':
176 iamrecursive = 1;
177 break;
178 /* Server options. */
179 case 'd':
180 targetshouldbedirectory = 1;
181 break;
182 case 'f': /* "from" */
183 iamremote = 1;
184 fflag = 1;
185 break;
186 case 't': /* "to" */
187 iamremote = 1;
188 tflag = 1;
189 break;
190 case '?':
191 default:
192 usage();
193 }
194 argc -= optind;
195 argv += optind;
196
197#ifdef KERBEROS
198 k = auth_getval("auth_list");
199 if (k && !strstr(k, "kerberos"))
200 use_kerberos = 0;
201 if (use_kerberos) {
202#ifdef CRYPT
c5fe5fd1
EN
203 shell = doencrypt ? __DECONST(char *, "ekshell") :
204 __DECONST(char *, "kshell");
984263bc 205#else
c5fe5fd1 206 shell = __DECONST(char *, "kshell");
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207#endif
208 if ((sp = getservbyname(shell, "tcp")) == NULL) {
209 use_kerberos = 0;
210 oldw("can't get entry for %s/tcp service", shell);
211 sp = getservbyname(shell = "shell", "tcp");
212 }
213 } else
c5fe5fd1
EN
214 shell = __DECONST(char *, "shell");
215 sp = getservbyname(shell, "tcp");
984263bc 216#else
c5fe5fd1
EN
217 shell = __DECONST(char *, "shell");
218 sp = getservbyname(shell, "tcp");
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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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MD
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)
c5fe5fd1 284 targ = __DECONST(char *, ".");
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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)
c5fe5fd1 304 src = __DECONST(char *, ".");
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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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MD
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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MD
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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MD
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);
984263bc
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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MD
382 iamrecursive ? " -PR" : "", pflag ? " -p" : "",
383 argv[i], argv[argc - 1]);
384 if (susystem(bp, userid))
385 ++errs;
57fed2af 386 free(bp);
984263bc
MD
387 continue;
388 }
389 *src++ = 0;
390 if (*src == 0)
c5fe5fd1 391 src = __DECONST(char *, ".");
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MD
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);
984263bc
MD
417 if (rem < 0) {
418 ++errs;
419 continue;
420 }
57fed2af 421 seteuid(userid);
984263bc
MD
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)
782054ba
SW
483 snprintf(buf, sizeof(buf), "C%04o %jd %s\n",
484 stb.st_mode & MODEMASK, (intmax_t)stb.st_size, last);
57fed2af 485 write(rem, buf, strlen(buf));
984263bc
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);
984263bc
MD
515 else
516 run_err("%s: %s", name, strerror(haderr));
57fed2af 517 response();
984263bc
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, '/');
678e8cc6 533 if (last == NULL)
984263bc
MD
534 last = name;
535 else
536 last++;
537 if (pflag) {
57fed2af 538 snprintf(path, sizeof(path), "T%ld 0 %ld 0\n",
984263bc
MD
539 (long)statp->st_mtimespec.tv_sec,
540 (long)statp->st_atimespec.tv_sec);
57fed2af 541 write(rem, path, strlen(path));
984263bc
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));
984263bc
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);
984263bc
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;
782054ba
SW
581 size_t count;
582 int amt, exists, first, mask, mode, ofd, omode;
984263bc 583 int setimes, targisdir, wrerrno = 0;
a17407d2 584 char ch, *cp, *np, *targ, *why, *vect[1], buf[BUFSIZ], path[PATH_MAX];
984263bc
MD
585
586#define atime tv[0]
587#define mtime tv[1]
c5fe5fd1 588#define SCREWUP(str) { why = __DECONST(char *, str); goto screwup; }
984263bc
MD
589
590 setimes = targisdir = 0;
591 mask = umask(0);
592 if (!pflag)
57fed2af 593 umask(mask);
984263bc
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);
984263bc
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,
984263bc
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);
984263bc
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);
984263bc
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) {
a17407d2
MD
681 if (strlen(targ) + (*targ ? 1 : 0) + strlen(cp)
682 >= sizeof(path)) {
683 run_err("%s%s%s: name too long", targ,
684 *targ ? "/" : "", cp);
685 exit(1);
984263bc 686 }
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MD
687 snprintf(path, sizeof(path), "%s%s%s", targ,
688 *targ ? "/" : "", cp);
689 np = path;
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MD
690 } else
691 np = targ;
692 exists = stat(np, &stb) == 0;
693 if (buf[0] == 'D') {
694 int mod_flag = pflag;
695 if (exists) {
696 if (!S_ISDIR(stb.st_mode)) {
697 errno = ENOTDIR;
698 goto bad;
699 }
700 if (pflag)
57fed2af 701 chmod(np, mode);
984263bc
MD
702 } else {
703 /* Handle copying from a read-only directory */
704 mod_flag = 1;
705 if (mkdir(np, mode | S_IRWXU) < 0)
706 goto bad;
707 }
708 vect[0] = np;
709 sink(1, vect);
710 if (setimes) {
711 setimes = 0;
712 if (utimes(np, tv) < 0)
713 run_err("%s: set times: %s",
714 np, strerror(errno));
715 }
716 if (mod_flag)
57fed2af 717 chmod(np, mode);
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MD
718 continue;
719 }
720 omode = mode;
721 mode |= S_IWRITE;
722 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
723bad: run_err("%s: %s", np, strerror(errno));
724 continue;
725 }
57fed2af 726 write(rem, "", 1);
984263bc 727 if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) {
57fed2af 728 close(ofd);
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MD
729 continue;
730 }
731 cp = bp->buf;
732 wrerr = NO;
733 for (count = i = 0; i < size; i += BUFSIZ) {
734 amt = BUFSIZ;
735 if (i + amt > size)
736 amt = size - i;
737 count += amt;
738 do {
739 j = read(rem, cp, amt);
740 if (j <= 0) {
741 run_err("%s", j ? strerror(errno) :
742 "dropped connection");
743 exit(1);
744 }
745 amt -= j;
746 cp += j;
747 } while (amt > 0);
748 if (count == bp->cnt) {
749 /* Keep reading so we stay sync'd up. */
750 if (wrerr == NO) {
751 j = write(ofd, bp->buf, count);
782054ba 752 if (j != (off_t)count) {
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MD
753 wrerr = YES;
754 wrerrno = j >= 0 ? EIO : errno;
755 }
756 }
757 count = 0;
758 cp = bp->buf;
759 }
760 }
761 if (count != 0 && wrerr == NO &&
782054ba 762 (j = write(ofd, bp->buf, count)) != (off_t)count) {
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MD
763 wrerr = YES;
764 wrerrno = j >= 0 ? EIO : errno;
765 }
766 if (ftruncate(ofd, size)) {
767 run_err("%s: truncate: %s", np, strerror(errno));
768 wrerr = DISPLAYED;
769 }
770 if (pflag) {
771 if (exists || omode != mode)
772 if (fchmod(ofd, omode))
773 run_err("%s: set mode: %s",
774 np, strerror(errno));
775 } else {
776 if (!exists && omode != mode)
777 if (fchmod(ofd, omode & ~mask))
778 run_err("%s: set mode: %s",
779 np, strerror(errno));
780 }
57fed2af
EN
781 close(ofd);
782 response();
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MD
783 if (setimes && wrerr == NO) {
784 setimes = 0;
785 if (utimes(np, tv) < 0) {
786 run_err("%s: set times: %s",
787 np, strerror(errno));
788 wrerr = DISPLAYED;
789 }
790 }
791 switch(wrerr) {
792 case YES:
793 run_err("%s: %s", np, strerror(wrerrno));
794 break;
795 case NO:
57fed2af 796 write(rem, "", 1);
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MD
797 break;
798 case DISPLAYED:
799 break;
800 }
801 }
802screwup:
803 run_err("protocol error: %s", why);
804 exit(1);
805}
806
807#ifdef KERBEROS
808int
809kerberos(char **host, char *bp, char *locuser, char *user)
810{
811 if (use_kerberos) {
812 setuid(getuid());
813 rem = KSUCCESS;
814 errno = 0;
815 if (dest_realm == NULL)
816 dest_realm = krb_realmofhost(*host);
817 rem =
818#ifdef CRYPT
819 doencrypt ?
820 krcmd_mutual(host,
821 port, user, bp, 0, dest_realm, &cred, schedule) :
822#endif
823 krcmd(host, port, user, bp, 0, dest_realm);
824
825 if (rem < 0) {
826 if (errno == ECONNREFUSED)
827 oldw("remote host doesn't support Kerberos");
828 else if (errno == ENOENT)
829 oldw("can't provide Kerberos authentication data");
830 execv(_PATH_RCP, argv_copy);
831 err(1, "execv: %s", _PATH_RCP);
832 }
833 } else {
834#ifdef CRYPT
835 if (doencrypt)
836 errx(1,
837 "the -x option requires Kerberos authentication");
838#endif
839 rem = rcmd_af(host, port, locuser, user, bp, 0, family);
840 }
841 return (rem);
842}
843#endif /* KERBEROS */
844
845int
846response(void)
847{
848 char ch, *cp, resp, rbuf[BUFSIZ];
849
850 if (read(rem, &resp, sizeof(resp)) != sizeof(resp))
851 lostconn(0);
852
853 cp = rbuf;
854 switch(resp) {
855 case 0: /* ok */
856 return (0);
857 default:
858 *cp++ = resp;
859 /* FALLTHROUGH */
860 case 1: /* error, followed by error msg */
861 case 2: /* fatal error, "" */
862 do {
863 if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
864 lostconn(0);
865 *cp++ = ch;
866 } while (cp < &rbuf[BUFSIZ] && ch != '\n');
867
868 if (!iamremote)
57fed2af 869 write(STDERR_FILENO, rbuf, cp - rbuf);
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MD
870 ++errs;
871 if (resp == 1)
872 return (-1);
873 exit(1);
874 }
875 /* NOTREACHED */
876}
877
878void
879usage(void)
880{
881#ifdef KERBEROS
882#ifdef CRYPT
57fed2af 883 fprintf(stderr, "%s\n%s\n",
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MD
884 "usage: rcp [-46Kpx] [-k realm] f1 f2",
885 " rcp [-46Kprx] [-k realm] f1 ... fn directory");
886#else
57fed2af 887 fprintf(stderr, "%s\n%s\n",
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MD
888 "usage: rcp [-46Kp] [-k realm] f1 f2",
889 " rcp [-46Kpr] [-k realm] f1 ... fn directory");
890#endif
891#else
57fed2af 892 fprintf(stderr, "%s\n%s\n",
984263bc
MD
893 "usage: rcp [-46p] f1 f2",
894 " rcp [-46pr] f1 ... fn directory");
895#endif
896 exit(1);
897}
898
899#include <stdarg.h>
900
901#ifdef KERBEROS
902void
903oldw(const char *fmt, ...)
904{
905 va_list ap;
906 va_start(ap, fmt);
57fed2af
EN
907 fprintf(stderr, "rcp: ");
908 vfprintf(stderr, fmt, ap);
909 fprintf(stderr, ", using standard rcp\n");
984263bc
MD
910 va_end(ap);
911}
912#endif
913
914void
915run_err(const char *fmt, ...)
916{
917 static FILE *fp;
918 va_list ap;
919 va_start(ap, fmt);
920
921 ++errs;
922 if (fp == NULL && !(fp = fdopen(rem, "w")))
923 return;
57fed2af
EN
924 fprintf(fp, "%c", 0x01);
925 fprintf(fp, "rcp: ");
926 vfprintf(fp, fmt, ap);
927 fprintf(fp, "\n");
928 fflush(fp);
984263bc
MD
929
930 if (!iamremote)
931 vwarnx(fmt, ap);
932
933 va_end(ap);
934}