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1.1 root 1: /*
2: * Copyright (c) 1983, 1990 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms are permitted provided
6: * that: (1) source distributions retain this entire copyright notice and
7: * comment, and (2) distributions including binaries display the following
8: * acknowledgement: ``This product includes software developed by the
9: * University of California, Berkeley and its contributors'' in the
10: * documentation or other materials provided with the distribution and in
11: * all advertising materials mentioning features or use of this software.
12: * Neither the name of the University nor the names of its contributors may
13: * be used to endorse or promote products derived from this software without
14: * specific prior written permission.
15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
16: * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
17: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
18: */
19:
20: #ifndef lint
21: char copyright[] =
22: "@(#) Copyright (c) 1983, 1990 The Regents of the University of California.\n\
23: All rights reserved.\n";
24: #endif /* not lint */
25:
26: #ifndef lint
27: static char sccsid[] = "@(#)rcp.c 5.30.1.1 (Berkeley) 10/21/90";
28: #endif /* not lint */
29:
30: /*
31: * rcp
32: */
33: #include <sys/param.h>
34: #include <sys/file.h>
35: #include <sys/stat.h>
36: #include <sys/time.h>
37: #include <sys/ioctl.h>
38: #include <sys/dir.h>
39: #include <sys/signal.h>
40: #include <netinet/in.h>
41: #include <netinet/in_systm.h>
42: #include <netinet/ip.h>
43: #include <pwd.h>
44: #include <netdb.h>
45: #include <errno.h>
46: #include <string.h>
47: #include <stdio.h>
48: #include <ctype.h>
49: #include "pathnames.h"
50:
51: #ifdef KERBEROS
52: #include <kerberosIV/des.h>
53: #include <kerberosIV/krb.h>
54: char dst_realm_buf[REALM_SZ];
55: char *dest_realm = NULL;
56: int use_kerberos = 1;
57: CREDENTIALS cred;
58: Key_schedule schedule;
59: extern char *krb_realmofhost();
60: #define OPTIONS "dfkprt"
61: #else
62: #define OPTIONS "dfprt"
63: #endif
64:
65: extern int errno;
66: struct passwd *pwd;
67: u_short port;
68: uid_t userid;
69: int errs, rem;
70: int pflag, iamremote, iamrecursive, targetshouldbedirectory;
71:
72: #define CMDNEEDS 64
73: char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
74:
75: typedef struct _buf {
76: int cnt;
77: char *buf;
78: } BUF;
79:
80: main(argc, argv)
81: int argc;
82: char **argv;
83: {
84: extern int optind;
85: struct servent *sp;
86: int ch, fflag, tflag;
87: char *targ, *shell, *colon();
88: struct passwd *getpwuid();
89: int lostconn();
90:
91: fflag = tflag = 0;
92: while ((ch = getopt(argc, argv, OPTIONS)) != EOF)
93: switch(ch) {
94: /* user-visible flags */
95: case 'p': /* preserve access/mod times */
96: ++pflag;
97: break;
98: case 'r':
99: ++iamrecursive;
100: break;
101: #ifdef KERBEROS
102: case 'k':
103: strncpy(dst_realm_buf, ++argv, REALM_SZ);
104: dest_realm = dst_realm_buf;
105: break;
106: #endif
107: /* rshd-invoked options (server) */
108: case 'd':
109: targetshouldbedirectory = 1;
110: break;
111: case 'f': /* "from" */
112: iamremote = 1;
113: fflag = 1;
114: break;
115: case 't': /* "to" */
116: iamremote = 1;
117: tflag = 1;
118: break;
119:
120: case '?':
121: default:
122: usage();
123: }
124: argc -= optind;
125: argv += optind;
126:
127: #ifdef KERBEROS
128: shell = "kshell";
129: sp = getservbyname(shell, "tcp");
130: if (sp == NULL) {
131: char msgbuf[64];
132: use_kerberos = 0;
133: (void) sprintf(msgbuf, "can't get entry for %s/tcp service",
134: shell);
135: old_warning(msgbuf);
136: sp = getservbyname("shell", "tcp");
137: }
138: #else
139: sp = getservbyname("shell", "tcp");
140: #endif
141: if (sp == NULL) {
142: (void)fprintf(stderr, "rcp: shell/tcp: unknown service\n");
143: exit(1);
144: }
145: port = sp->s_port;
146:
147: if (!(pwd = getpwuid(userid = getuid()))) {
148: (void)fprintf(stderr, "rcp: unknown user %d.\n", userid);
149: exit(1);
150: }
151:
152: if (fflag) {
153: /* follow "protocol", send data */
154: (void)response();
155: (void)setuid(userid);
156: source(argc, argv);
157: exit(errs);
158: }
159:
160: if (tflag) {
161: /* receive data */
162: (void)setuid(userid);
163: sink(argc, argv);
164: exit(errs);
165: }
166:
167: if (argc < 2)
168: usage();
169: if (argc > 2)
170: targetshouldbedirectory = 1;
171:
172: rem = -1;
173: /* command to be executed on remote system using "rsh" */
174: #ifdef KERBEROS
175: (void)sprintf(cmd, "rcp%s%s%s%s", iamrecursive ? " -r" : "",
176: "",
177: pflag ? " -p" : "", targetshouldbedirectory ? " -d" : "");
178: #else
179: (void)sprintf(cmd, "rcp%s%s%s", iamrecursive ? " -r" : "",
180: pflag ? " -p" : "", targetshouldbedirectory ? " -d" : "");
181: #endif
182:
183: (void)signal(SIGPIPE, lostconn);
184:
185: if (targ = colon(argv[argc - 1]))
186: toremote(targ, argc, argv); /* destination is remote host */
187: else {
188: tolocal(argc, argv); /* destination is local host */
189: if (targetshouldbedirectory)
190: verifydir(argv[argc - 1]);
191: }
192: exit(errs);
193: }
194:
195: toremote(targ, argc, argv)
196: char *targ;
197: int argc;
198: char **argv;
199: {
200: int i, tos;
201: char *bp, *host, *src, *suser, *thost, *tuser;
202: char *colon(), *malloc();
203:
204: *targ++ = 0;
205: if (*targ == 0)
206: targ = ".";
207:
208: if (thost = index(argv[argc - 1], '@')) {
209: /* user@host */
210: *thost++ = 0;
211: tuser = argv[argc - 1];
212: if (*tuser == '\0')
213: tuser = NULL;
214: else if (!okname(tuser))
215: exit(1);
216: } else {
217: thost = argv[argc - 1];
218: tuser = NULL;
219: }
220:
221: for (i = 0; i < argc - 1; i++) {
222: src = colon(argv[i]);
223: if (src) { /* remote to remote */
224: *src++ = 0;
225: if (*src == 0)
226: src = ".";
227: host = index(argv[i], '@');
228: if (!(bp = malloc((u_int)(strlen(_PATH_RSH) +
229: strlen(argv[i]) + strlen(src) +
230: tuser ? strlen(tuser) : 0 + strlen(thost) +
231: strlen(targ)) + CMDNEEDS + 20)))
232: nospace();
233: if (host) {
234: *host++ = 0;
235: suser = argv[i];
236: if (*suser == '\0')
237: suser = pwd->pw_name;
238: else if (!okname(suser))
239: continue;
240: (void)sprintf(bp,
241: "%s %s -l %s -n %s %s '%s%s%s:%s'",
242: _PATH_RSH, host, suser, cmd, src,
243: tuser ? tuser : "", tuser ? "@" : "",
244: thost, targ);
245: } else
246: (void)sprintf(bp, "%s %s -n %s %s '%s%s%s:%s'",
247: _PATH_RSH, argv[i], cmd, src,
248: tuser ? tuser : "", tuser ? "@" : "",
249: thost, targ);
250: (void)susystem(bp);
251: (void)free(bp);
252: } else { /* local to remote */
253: if (rem == -1) {
254: if (!(bp = malloc((u_int)strlen(targ) +
255: CMDNEEDS + 20)))
256: nospace();
257: (void)sprintf(bp, "%s -t %s", cmd, targ);
258: host = thost;
259: #ifdef KERBEROS
260: if (use_kerberos)
261: rem = kerberos(&host, bp,
262: pwd->pw_name,
263: tuser ? tuser : pwd->pw_name);
264: else
265: #endif
266: rem = rcmd(&host, port, pwd->pw_name,
267: tuser ? tuser : pwd->pw_name,
268: bp, 0);
269: if (rem < 0)
270: exit(1);
271: tos = IPTOS_THROUGHPUT;
272: if (setsockopt(rem, IPPROTO_IP, IP_TOS,
273: (char *)&tos, sizeof(int)) < 0)
274: perror("rcp: setsockopt TOS (ignored)");
275: if (response() < 0)
276: exit(1);
277: (void)free(bp);
278: (void)setuid(userid);
279: }
280: source(1, argv+i);
281: }
282: }
283: }
284:
285: tolocal(argc, argv)
286: int argc;
287: char **argv;
288: {
289: int i, tos;
290: char *bp, *host, *src, *suser;
291: char *colon(), *malloc();
292:
293: for (i = 0; i < argc - 1; i++) {
294: if (!(src = colon(argv[i]))) { /* local to local */
295: if (!(bp = malloc((u_int)(strlen(_PATH_CP) +
296: strlen(argv[i]) + strlen(argv[argc - 1])) + 20)))
297: nospace();
298: (void)sprintf(bp, "%s%s%s %s %s", _PATH_CP,
299: iamrecursive ? " -r" : "", pflag ? " -p" : "",
300: argv[i], argv[argc - 1]);
301: (void)susystem(bp);
302: (void)free(bp);
303: continue;
304: }
305: *src++ = 0;
306: if (*src == 0)
307: src = ".";
308: host = index(argv[i], '@');
309: if (host) {
310: *host++ = 0;
311: suser = argv[i];
312: if (*suser == '\0')
313: suser = pwd->pw_name;
314: else if (!okname(suser))
315: continue;
316: } else {
317: host = argv[i];
318: suser = pwd->pw_name;
319: }
320: if (!(bp = malloc((u_int)(strlen(src)) + CMDNEEDS + 20)))
321: nospace();
322: (void)sprintf(bp, "%s -f %s", cmd, src);
323: #ifdef KERBEROS
324: if (use_kerberos)
325: rem = kerberos(&host, bp, pwd->pw_name, suser);
326: else
327: #endif
328: rem = rcmd(&host, port, pwd->pw_name, suser, bp, 0);
329: (void)free(bp);
330: if (rem < 0)
331: continue;
332: (void)seteuid(userid);
333: tos = IPTOS_THROUGHPUT;
334: if (setsockopt(rem, IPPROTO_IP, IP_TOS,
335: (char *)&tos, sizeof(int)) < 0)
336: perror("rcp: setsockopt TOS (ignored)");
337: sink(1, argv + argc - 1);
338: (void)seteuid(0);
339: (void)close(rem);
340: rem = -1;
341: }
342: }
343:
344: verifydir(cp)
345: char *cp;
346: {
347: struct stat stb;
348:
349: if (stat(cp, &stb) >= 0) {
350: if ((stb.st_mode & S_IFMT) == S_IFDIR)
351: return;
352: errno = ENOTDIR;
353: }
354: error("rcp: %s: %s.\n", cp, strerror(errno));
355: exit(1);
356: }
357:
358: char *
359: colon(cp)
360: register char *cp;
361: {
362: for (; *cp; ++cp) {
363: if (*cp == ':')
364: return(cp);
365: if (*cp == '/')
366: return(0);
367: }
368: return(0);
369: }
370:
371: okname(cp0)
372: char *cp0;
373: {
374: register char *cp = cp0;
375: register int c;
376:
377: do {
378: c = *cp;
379: if (c & 0200)
380: goto bad;
381: if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
382: goto bad;
383: } while (*++cp);
384: return(1);
385: bad:
386: (void)fprintf(stderr, "rcp: invalid user name %s\n", cp0);
387: return(0);
388: }
389:
390: susystem(s)
391: char *s;
392: {
393: int status, pid, w;
394: register sig_t istat, qstat;
395:
396: if ((pid = vfork()) == 0) {
397: (void)setuid(userid);
398: execl(_PATH_BSHELL, "sh", "-c", s, (char *)0);
399: _exit(127);
400: }
401: istat = signal(SIGINT, SIG_IGN);
402: qstat = signal(SIGQUIT, SIG_IGN);
403: while ((w = wait(&status)) != pid && w != -1)
404: ;
405: if (w == -1)
406: status = -1;
407: (void)signal(SIGINT, istat);
408: (void)signal(SIGQUIT, qstat);
409: return(status);
410: }
411:
412: source(argc, argv)
413: int argc;
414: char **argv;
415: {
416: struct stat stb;
417: static BUF buffer;
418: BUF *bp;
419: off_t i;
420: int x, readerr, f, amt;
421: char *last, *name, buf[BUFSIZ];
422: BUF *allocbuf();
423:
424: for (x = 0; x < argc; x++) {
425: name = argv[x];
426: if ((f = open(name, O_RDONLY, 0)) < 0) {
427: error("rcp: %s: %s\n", name, strerror(errno));
428: continue;
429: }
430: if (fstat(f, &stb) < 0)
431: goto notreg;
432: switch (stb.st_mode&S_IFMT) {
433:
434: case S_IFREG:
435: break;
436:
437: case S_IFDIR:
438: if (iamrecursive) {
439: (void)close(f);
440: rsource(name, &stb);
441: continue;
442: }
443: /* FALLTHROUGH */
444: default:
445: notreg: (void)close(f);
446: error("rcp: %s: not a plain file\n", name);
447: continue;
448: }
449: last = rindex(name, '/');
450: if (last == 0)
451: last = name;
452: else
453: last++;
454: if (pflag) {
455: /*
456: * Make it compatible with possible future
457: * versions expecting microseconds.
458: */
459: (void)sprintf(buf, "T%ld 0 %ld 0\n", stb.st_mtime,
460: stb.st_atime);
461: (void)write(rem, buf, strlen(buf));
462: if (response() < 0) {
463: (void)close(f);
464: continue;
465: }
466: }
467: (void)sprintf(buf, "C%04o %ld %s\n", stb.st_mode&07777,
468: stb.st_size, last);
469: (void)write(rem, buf, strlen(buf));
470: if (response() < 0) {
471: (void)close(f);
472: continue;
473: }
474: if ((bp = allocbuf(&buffer, f, BUFSIZ)) == 0) {
475: (void)close(f);
476: continue;
477: }
478: readerr = 0;
479: for (i = 0; i < stb.st_size; i += bp->cnt) {
480: amt = bp->cnt;
481: if (i + amt > stb.st_size)
482: amt = stb.st_size - i;
483: if (readerr == 0 && read(f, bp->buf, amt) != amt)
484: readerr = errno;
485: (void)write(rem, bp->buf, amt);
486: }
487: (void)close(f);
488: if (readerr == 0)
489: (void)write(rem, "", 1);
490: else
491: error("rcp: %s: %s\n", name, strerror(readerr));
492: (void)response();
493: }
494: }
495:
496: rsource(name, statp)
497: char *name;
498: struct stat *statp;
499: {
500: DIR *d;
501: struct direct *dp;
502: char *last, *vect[1], path[MAXPATHLEN];
503:
504: if (!(d = opendir(name))) {
505: error("rcp: %s: %s\n", name, strerror(errno));
506: return;
507: }
508: last = rindex(name, '/');
509: if (last == 0)
510: last = name;
511: else
512: last++;
513: if (pflag) {
514: (void)sprintf(path, "T%ld 0 %ld 0\n", statp->st_mtime,
515: statp->st_atime);
516: (void)write(rem, path, strlen(path));
517: if (response() < 0) {
518: closedir(d);
519: return;
520: }
521: }
522: (void)sprintf(path, "D%04o %d %s\n", statp->st_mode&07777, 0, last);
523: (void)write(rem, path, strlen(path));
524: if (response() < 0) {
525: closedir(d);
526: return;
527: }
528: while (dp = readdir(d)) {
529: if (dp->d_ino == 0)
530: continue;
531: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
532: continue;
533: if (strlen(name) + 1 + strlen(dp->d_name) >= MAXPATHLEN - 1) {
534: error("%s/%s: name too long.\n", name, dp->d_name);
535: continue;
536: }
537: (void)sprintf(path, "%s/%s", name, dp->d_name);
538: vect[0] = path;
539: source(1, vect);
540: }
541: closedir(d);
542: (void)write(rem, "E\n", 2);
543: (void)response();
544: }
545:
546: response()
547: {
548: register char *cp;
549: char ch, resp, rbuf[BUFSIZ];
550:
551: if (read(rem, &resp, sizeof(resp)) != sizeof(resp))
552: lostconn();
553:
554: cp = rbuf;
555: switch(resp) {
556: case 0: /* ok */
557: return(0);
558: default:
559: *cp++ = resp;
560: /* FALLTHROUGH */
561: case 1: /* error, followed by err msg */
562: case 2: /* fatal error, "" */
563: do {
564: if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
565: lostconn();
566: *cp++ = ch;
567: } while (cp < &rbuf[BUFSIZ] && ch != '\n');
568:
569: if (!iamremote)
570: (void)write(2, rbuf, cp - rbuf);
571: ++errs;
572: if (resp == 1)
573: return(-1);
574: exit(1);
575: }
576: /*NOTREACHED*/
577: }
578:
579: lostconn()
580: {
581: if (!iamremote)
582: (void)fprintf(stderr, "rcp: lost connection\n");
583: exit(1);
584: }
585:
586: sink(argc, argv)
587: int argc;
588: char **argv;
589: {
590: register char *cp;
591: static BUF buffer;
592: struct stat stb;
593: struct timeval tv[2];
594: enum { YES, NO, DISPLAYED } wrerr;
595: BUF *bp, *allocbuf();
596: off_t i, j;
597: char ch, *targ, *why;
598: int amt, count, exists, first, mask, mode;
599: int ofd, setimes, size, targisdir;
600: char *np, *vect[1], buf[BUFSIZ], *malloc();
601:
602: #define atime tv[0]
603: #define mtime tv[1]
604: #define SCREWUP(str) { why = str; goto screwup; }
605:
606: setimes = targisdir = 0;
607: mask = umask(0);
608: if (!pflag)
609: (void)umask(mask);
610: if (argc != 1) {
611: error("rcp: ambiguous target\n");
612: exit(1);
613: }
614: targ = *argv;
615: if (targetshouldbedirectory)
616: verifydir(targ);
617: (void)write(rem, "", 1);
618: if (stat(targ, &stb) == 0 && (stb.st_mode & S_IFMT) == S_IFDIR)
619: targisdir = 1;
620: for (first = 1;; first = 0) {
621: cp = buf;
622: if (read(rem, cp, 1) <= 0)
623: return;
624: if (*cp++ == '\n')
625: SCREWUP("unexpected <newline>");
626: do {
627: if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
628: SCREWUP("lost connection");
629: *cp++ = ch;
630: } while (cp < &buf[BUFSIZ - 1] && ch != '\n');
631: *cp = 0;
632:
633: if (buf[0] == '\01' || buf[0] == '\02') {
634: if (iamremote == 0)
635: (void)write(2, buf + 1, strlen(buf + 1));
636: if (buf[0] == '\02')
637: exit(1);
638: errs++;
639: continue;
640: }
641: if (buf[0] == 'E') {
642: (void)write(rem, "", 1);
643: return;
644: }
645:
646: if (ch == '\n')
647: *--cp = 0;
648:
649: #define getnum(t) (t) = 0; while (isdigit(*cp)) (t) = (t) * 10 + (*cp++ - '0');
650: cp = buf;
651: if (*cp == 'T') {
652: setimes++;
653: cp++;
654: getnum(mtime.tv_sec);
655: if (*cp++ != ' ')
656: SCREWUP("mtime.sec not delimited");
657: getnum(mtime.tv_usec);
658: if (*cp++ != ' ')
659: SCREWUP("mtime.usec not delimited");
660: getnum(atime.tv_sec);
661: if (*cp++ != ' ')
662: SCREWUP("atime.sec not delimited");
663: getnum(atime.tv_usec);
664: if (*cp++ != '\0')
665: SCREWUP("atime.usec not delimited");
666: (void)write(rem, "", 1);
667: continue;
668: }
669: if (*cp != 'C' && *cp != 'D') {
670: /*
671: * Check for the case "rcp remote:foo\* local:bar".
672: * In this case, the line "No match." can be returned
673: * by the shell before the rcp command on the remote is
674: * executed so the ^Aerror_message convention isn't
675: * followed.
676: */
677: if (first) {
678: error("%s\n", cp);
679: exit(1);
680: }
681: SCREWUP("expected control record");
682: }
683: mode = 0;
684: for (++cp; cp < buf + 5; cp++) {
685: if (*cp < '0' || *cp > '7')
686: SCREWUP("bad mode");
687: mode = (mode << 3) | (*cp - '0');
688: }
689: if (*cp++ != ' ')
690: SCREWUP("mode not delimited");
691: size = 0;
692: while (isdigit(*cp))
693: size = size * 10 + (*cp++ - '0');
694: if (*cp++ != ' ')
695: SCREWUP("size not delimited");
696: if (targisdir) {
697: static char *namebuf;
698: static int cursize;
699: int need;
700:
701: need = strlen(targ) + strlen(cp) + 250;
702: if (need > cursize) {
703: if (!(namebuf = malloc((u_int)need)))
704: error("out of memory\n");
705: }
706: (void)sprintf(namebuf, "%s%s%s", targ,
707: *targ ? "/" : "", cp);
708: np = namebuf;
709: }
710: else
711: np = targ;
712: exists = stat(np, &stb) == 0;
713: if (buf[0] == 'D') {
714: if (exists) {
715: if ((stb.st_mode&S_IFMT) != S_IFDIR) {
716: errno = ENOTDIR;
717: goto bad;
718: }
719: if (pflag)
720: (void)chmod(np, mode);
721: } else if (mkdir(np, mode) < 0)
722: goto bad;
723: vect[0] = np;
724: sink(1, vect);
725: if (setimes) {
726: setimes = 0;
727: if (utimes(np, tv) < 0)
728: error("rcp: can't set times on %s: %s\n",
729: np, strerror(errno));
730: }
731: continue;
732: }
733: if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
734: bad: error("rcp: %s: %s\n", np, strerror(errno));
735: continue;
736: }
737: if (exists && pflag)
738: (void)fchmod(ofd, mode);
739: (void)write(rem, "", 1);
740: if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == 0) {
741: (void)close(ofd);
742: continue;
743: }
744: cp = bp->buf;
745: count = 0;
746: wrerr = NO;
747: for (i = 0; i < size; i += BUFSIZ) {
748: amt = BUFSIZ;
749: if (i + amt > size)
750: amt = size - i;
751: count += amt;
752: do {
753: j = read(rem, cp, amt);
754: if (j <= 0) {
755: error("rcp: %s\n",
756: j ? strerror(errno) :
757: "dropped connection");
758: exit(1);
759: }
760: amt -= j;
761: cp += j;
762: } while (amt > 0);
763: if (count == bp->cnt) {
764: if (wrerr == NO &&
765: write(ofd, bp->buf, count) != count)
766: wrerr = YES;
767: count = 0;
768: cp = bp->buf;
769: }
770: }
771: if (count != 0 && wrerr == NO &&
772: write(ofd, bp->buf, count) != count)
773: wrerr = YES;
774: if (ftruncate(ofd, size)) {
775: error("rcp: can't truncate %s: %s\n", np,
776: strerror(errno));
777: wrerr = DISPLAYED;
778: }
779: (void)close(ofd);
780: (void)response();
781: if (setimes && wrerr == NO) {
782: setimes = 0;
783: if (utimes(np, tv) < 0) {
784: error("rcp: can't set times on %s: %s\n",
785: np, strerror(errno));
786: wrerr = DISPLAYED;
787: }
788: }
789: switch(wrerr) {
790: case YES:
791: error("rcp: %s: %s\n", np, strerror(errno));
792: break;
793: case NO:
794: (void)write(rem, "", 1);
795: break;
796: case DISPLAYED:
797: break;
798: }
799: }
800: screwup:
801: error("rcp: protocol screwup: %s\n", why);
802: exit(1);
803: }
804:
805: BUF *
806: allocbuf(bp, fd, blksize)
807: BUF *bp;
808: int fd, blksize;
809: {
810: struct stat stb;
811: int size;
812: char *malloc();
813:
814: if (fstat(fd, &stb) < 0) {
815: error("rcp: fstat: %s\n", strerror(errno));
816: return(0);
817: }
818: size = roundup(stb.st_blksize, blksize);
819: if (size == 0)
820: size = blksize;
821: if (bp->cnt < size) {
822: if (bp->buf != 0)
823: free(bp->buf);
824: bp->buf = (char *)malloc((u_int)size);
825: if (!bp->buf) {
826: error("rcp: malloc: out of memory\n");
827: return(0);
828: }
829: }
830: bp->cnt = size;
831: return(bp);
832: }
833:
834: /* VARARGS1 */
835: error(fmt, a1, a2, a3)
836: char *fmt;
837: int a1, a2, a3;
838: {
839: static FILE *fp;
840:
841: ++errs;
842: if (!fp && !(fp = fdopen(rem, "w")))
843: return;
844: (void)fprintf(fp, "%c", 0x01);
845: (void)fprintf(fp, fmt, a1, a2, a3);
846: (void)fflush(fp);
847: if (!iamremote)
848: (void)fprintf(stderr, fmt, a1, a2, a3);
849: }
850:
851: nospace()
852: {
853: (void)fprintf(stderr, "rcp: out of memory.\n");
854: exit(1);
855: }
856:
857:
858: usage()
859: {
860: #ifdef KERBEROS
861: (void)fprintf(stderr, "%s\n\t%s\n",
862: "usage: rcp [-k realm] [-p] f1 f2",
863: "or: rcp [-k realm] [-rp] f1 ... fn directory");
864: #else
865: (void)fprintf(stderr,
866: "usage: rcp [-p] f1 f2; or: rcp [-rp] f1 ... fn directory\n");
867: #endif
868: exit(1);
869: }
870:
871: #ifdef KERBEROS
872: old_warning(str)
873: char *str;
874: {
875: (void)fprintf(stderr, "rcp: warning: %s, using standard rcp\n", str);
876: }
877:
878: int
879: kerberos(host, bp, locuser, user)
880:
881: char **host, *bp, *locuser, *user;
882: {
883: struct servent *sp;
884:
885: again:
886: if (use_kerberos) {
887: rem = KSUCCESS;
888: errno = 0;
889: if (dest_realm == NULL)
890: dest_realm = krb_realmofhost(*host);
891:
892: rem = krcmd(
893: host, port,
894: user, bp, 0, dest_realm);
895:
896: if (rem < 0) {
897: use_kerberos = 0;
898: sp = getservbyname("shell", "tcp");
899: if (sp == NULL) {
900: (void)fprintf(stderr,
901: "rcp: unknown service shell/tcp\n");
902: exit(1);
903: }
904: if (errno == ECONNREFUSED)
905: old_warning(
906: "remote host doesn't support Kerberos");
907:
908: if (errno == ENOENT)
909: old_warning(
910: "Can't provide Kerberos auth data");
911: port = sp->s_port;
912: goto again;
913: }
914: } else {
915: rem = rcmd(host, sp->s_port, locuser, user, bp, 0);
916: }
917: return(rem);
918: }
919: #endif /* KERBEROS */
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