![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to server.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [CSRG BSD Unix] / 43BSDReno / usr.bin / rdist|
Return to server.c CVS log | Up to [CSRG BSD Unix] / 43BSDReno / usr.bin / rdist |
1.1 root 1: /*
2: * Copyright (c) 1983 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms are permitted
6: * provided that: (1) source distributions retain this entire copyright
7: * notice and comment, and (2) distributions including binaries display
8: * the following acknowledgement: ``This product includes software
9: * developed by the University of California, Berkeley and its contributors''
10: * in the documentation or other materials provided with the distribution
11: * and in all advertising materials mentioning features or use of this
12: * software. Neither the name of the University nor the names of its
13: * contributors may be used to endorse or promote products derived
14: * from this software without specific prior written permission.
15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
18: */
19:
20: #ifndef lint
21: static char sccsid[] = "@(#)server.c 5.12 (Berkeley) 6/1/90";
22: #endif /* not lint */
23:
24: #include "defs.h"
25:
26: #define ack() (void) write(rem, "\0\n", 2)
27: #define err() (void) write(rem, "\1\n", 2)
28:
29: struct linkbuf *ihead; /* list of files with more than one link */
30: char buf[BUFSIZ]; /* general purpose buffer */
31: char target[BUFSIZ]; /* target/source directory name */
32: char *tp; /* pointer to end of target name */
33: char *Tdest; /* pointer to last T dest*/
34: int catname; /* cat name to target name */
35: char *stp[32]; /* stack of saved tp's for directories */
36: int oumask; /* old umask for creating files */
37:
38: extern FILE *lfp; /* log file for mailing changes */
39:
40: int cleanup();
41: struct linkbuf *savelink();
42:
43: /*
44: * Server routine to read requests and process them.
45: * Commands are:
46: * Tname - Transmit file if out of date
47: * Vname - Verify if file out of date or not
48: * Qname - Query if file exists. Return mtime & size if it does.
49: */
50: server()
51: {
52: char cmdbuf[BUFSIZ];
53: register char *cp;
54:
55: signal(SIGHUP, cleanup);
56: signal(SIGINT, cleanup);
57: signal(SIGQUIT, cleanup);
58: signal(SIGTERM, cleanup);
59: signal(SIGPIPE, cleanup);
60:
61: rem = 0;
62: oumask = umask(0);
63: (void) sprintf(buf, "V%d\n", VERSION);
64: (void) write(rem, buf, strlen(buf));
65:
66: for (;;) {
67: cp = cmdbuf;
68: if (read(rem, cp, 1) <= 0)
69: return;
70: if (*cp++ == '\n') {
71: error("server: expected control record\n");
72: continue;
73: }
74: do {
75: if (read(rem, cp, 1) != 1)
76: cleanup();
77: } while (*cp++ != '\n' && cp < &cmdbuf[BUFSIZ]);
78: *--cp = '\0';
79: cp = cmdbuf;
80: switch (*cp++) {
81: case 'T': /* init target file/directory name */
82: catname = 1; /* target should be directory */
83: goto dotarget;
84:
85: case 't': /* init target file/directory name */
86: catname = 0;
87: dotarget:
88: if (exptilde(target, cp) == NULL)
89: continue;
90: tp = target;
91: while (*tp)
92: tp++;
93: ack();
94: continue;
95:
96: case 'R': /* Transfer a regular file. */
97: recvf(cp, S_IFREG);
98: continue;
99:
100: case 'D': /* Transfer a directory. */
101: recvf(cp, S_IFDIR);
102: continue;
103:
104: case 'K': /* Transfer symbolic link. */
105: recvf(cp, S_IFLNK);
106: continue;
107:
108: case 'k': /* Transfer hard link. */
109: hardlink(cp);
110: continue;
111:
112: case 'E': /* End. (of directory) */
113: *tp = '\0';
114: if (catname <= 0) {
115: error("server: too many 'E's\n");
116: continue;
117: }
118: tp = stp[--catname];
119: *tp = '\0';
120: ack();
121: continue;
122:
123: case 'C': /* Clean. Cleanup a directory */
124: clean(cp);
125: continue;
126:
127: case 'Q': /* Query. Does the file/directory exist? */
128: query(cp);
129: continue;
130:
131: case 'S': /* Special. Execute commands */
132: dospecial(cp);
133: continue;
134:
135: #ifdef notdef
136: /*
137: * These entries are reserved but not currently used.
138: * The intent is to allow remote hosts to have master copies.
139: * Currently, only the host rdist runs on can have masters.
140: */
141: case 'X': /* start a new list of files to exclude */
142: except = bp = NULL;
143: case 'x': /* add name to list of files to exclude */
144: if (*cp == '\0') {
145: ack();
146: continue;
147: }
148: if (*cp == '~') {
149: if (exptilde(buf, cp) == NULL)
150: continue;
151: cp = buf;
152: }
153: if (bp == NULL)
154: except = bp = expand(makeblock(NAME, cp), E_VARS);
155: else
156: bp->b_next = expand(makeblock(NAME, cp), E_VARS);
157: while (bp->b_next != NULL)
158: bp = bp->b_next;
159: ack();
160: continue;
161:
162: case 'I': /* Install. Transfer file if out of date. */
163: opts = 0;
164: while (*cp >= '0' && *cp <= '7')
165: opts = (opts << 3) | (*cp++ - '0');
166: if (*cp++ != ' ') {
167: error("server: options not delimited\n");
168: return;
169: }
170: install(cp, opts);
171: continue;
172:
173: case 'L': /* Log. save message in log file */
174: log(lfp, cp);
175: continue;
176: #endif
177:
178: case '\1':
179: nerrs++;
180: continue;
181:
182: case '\2':
183: return;
184:
185: default:
186: error("server: unknown command '%s'\n", cp);
187: case '\0':
188: continue;
189: }
190: }
191: }
192:
193: /*
194: * Update the file(s) if they are different.
195: * destdir = 1 if destination should be a directory
196: * (i.e., more than one source is being copied to the same destination).
197: */
198: install(src, dest, destdir, opts)
199: char *src, *dest;
200: int destdir, opts;
201: {
202: char *rname;
203: char destcopy[BUFSIZ];
204:
205: if (dest == NULL) {
206: opts &= ~WHOLE; /* WHOLE mode only useful if renaming */
207: dest = src;
208: }
209:
210: if (nflag || debug) {
211: printf("%s%s%s%s%s %s %s\n", opts & VERIFY ? "verify":"install",
212: opts & WHOLE ? " -w" : "",
213: opts & YOUNGER ? " -y" : "",
214: opts & COMPARE ? " -b" : "",
215: opts & REMOVE ? " -R" : "", src, dest);
216: if (nflag)
217: return;
218: }
219:
220: rname = exptilde(target, src);
221: if (rname == NULL)
222: return;
223: tp = target;
224: while (*tp)
225: tp++;
226: /*
227: * If we are renaming a directory and we want to preserve
228: * the directory heirarchy (-w), we must strip off the leading
229: * directory name and preserve the rest.
230: */
231: if (opts & WHOLE) {
232: while (*rname == '/')
233: rname++;
234: destdir = 1;
235: } else {
236: rname = rindex(target, '/');
237: if (rname == NULL)
238: rname = target;
239: else
240: rname++;
241: }
242: if (debug)
243: printf("target = %s, rname = %s\n", target, rname);
244: /*
245: * Pass the destination file/directory name to remote.
246: */
247: (void) sprintf(buf, "%c%s\n", destdir ? 'T' : 't', dest);
248: if (debug)
249: printf("buf = %s", buf);
250: (void) write(rem, buf, strlen(buf));
251: if (response() < 0)
252: return;
253:
254: if (destdir) {
255: strcpy(destcopy, dest);
256: Tdest = destcopy;
257: }
258: sendf(rname, opts);
259: Tdest = 0;
260: }
261:
262: #define protoname() (pw ? pw->pw_name : user)
263: #define protogroup() (gr ? gr->gr_name : group)
264: /*
265: * Transfer the file or directory in target[].
266: * rname is the name of the file on the remote host.
267: */
268: sendf(rname, opts)
269: char *rname;
270: int opts;
271: {
272: register struct subcmd *sc;
273: struct stat stb;
274: int sizerr, f, u, len;
275: off_t i;
276: DIR *d;
277: struct direct *dp;
278: char *otp, *cp;
279: extern struct subcmd *subcmds;
280: static char user[15], group[15];
281:
282: if (debug)
283: printf("sendf(%s, %x)\n", rname, opts);
284:
285: if (except(target))
286: return;
287: if ((opts & FOLLOW ? stat(target, &stb) : lstat(target, &stb)) < 0) {
288: error("%s: %s\n", target, strerror(errno));
289: return;
290: }
291: if ((u = update(rname, opts, &stb)) == 0) {
292: if ((stb.st_mode & S_IFMT) == S_IFREG && stb.st_nlink > 1)
293: (void) savelink(&stb);
294: return;
295: }
296:
297: if (pw == NULL || pw->pw_uid != stb.st_uid)
298: if ((pw = getpwuid(stb.st_uid)) == NULL) {
299: log(lfp, "%s: no password entry for uid %d \n",
300: target, stb.st_uid);
301: pw = NULL;
302: sprintf(user, ":%d", stb.st_uid);
303: }
304: if (gr == NULL || gr->gr_gid != stb.st_gid)
305: if ((gr = getgrgid(stb.st_gid)) == NULL) {
306: log(lfp, "%s: no name for group %d\n",
307: target, stb.st_gid);
308: gr = NULL;
309: sprintf(group, ":%d", stb.st_gid);
310: }
311: if (u == 1) {
312: if (opts & VERIFY) {
313: log(lfp, "need to install: %s\n", target);
314: goto dospecial;
315: }
316: log(lfp, "installing: %s\n", target);
317: opts &= ~(COMPARE|REMOVE);
318: }
319:
320: switch (stb.st_mode & S_IFMT) {
321: case S_IFDIR:
322: if ((d = opendir(target)) == NULL) {
323: error("%s: %s\n", target, strerror(errno));
324: return;
325: }
326: (void) sprintf(buf, "D%o %04o 0 0 %s %s %s\n", opts,
327: stb.st_mode & 07777, protoname(), protogroup(), rname);
328: if (debug)
329: printf("buf = %s", buf);
330: (void) write(rem, buf, strlen(buf));
331: if (response() < 0) {
332: closedir(d);
333: return;
334: }
335:
336: if (opts & REMOVE)
337: rmchk(opts);
338:
339: otp = tp;
340: len = tp - target;
341: while (dp = readdir(d)) {
342: if (!strcmp(dp->d_name, ".") ||
343: !strcmp(dp->d_name, ".."))
344: continue;
345: if (len + 1 + strlen(dp->d_name) >= BUFSIZ - 1) {
346: error("%s/%s: Name too long\n", target,
347: dp->d_name);
348: continue;
349: }
350: tp = otp;
351: *tp++ = '/';
352: cp = dp->d_name;
353: while (*tp++ = *cp++)
354: ;
355: tp--;
356: sendf(dp->d_name, opts);
357: }
358: closedir(d);
359: (void) write(rem, "E\n", 2);
360: (void) response();
361: tp = otp;
362: *tp = '\0';
363: return;
364:
365: case S_IFLNK:
366: if (u != 1)
367: opts |= COMPARE;
368: if (stb.st_nlink > 1) {
369: struct linkbuf *lp;
370:
371: if ((lp = savelink(&stb)) != NULL) {
372: /* install link */
373: if (*lp->target == 0)
374: (void) sprintf(buf, "k%o %s %s\n", opts,
375: lp->pathname, rname);
376: else
377: (void) sprintf(buf, "k%o %s/%s %s\n", opts,
378: lp->target, lp->pathname, rname);
379: if (debug)
380: printf("buf = %s", buf);
381: (void) write(rem, buf, strlen(buf));
382: (void) response();
383: return;
384: }
385: }
386: (void) sprintf(buf, "K%o %o %ld %ld %s %s %s\n", opts,
387: stb.st_mode & 07777, stb.st_size, stb.st_mtime,
388: protoname(), protogroup(), rname);
389: if (debug)
390: printf("buf = %s", buf);
391: (void) write(rem, buf, strlen(buf));
392: if (response() < 0)
393: return;
394: sizerr = (readlink(target, buf, BUFSIZ) != stb.st_size);
395: (void) write(rem, buf, stb.st_size);
396: if (debug)
397: printf("readlink = %.*s\n", (int)stb.st_size, buf);
398: goto done;
399:
400: case S_IFREG:
401: break;
402:
403: default:
404: error("%s: not a file or directory\n", target);
405: return;
406: }
407:
408: if (u == 2) {
409: if (opts & VERIFY) {
410: log(lfp, "need to update: %s\n", target);
411: goto dospecial;
412: }
413: log(lfp, "updating: %s\n", target);
414: }
415:
416: if (stb.st_nlink > 1) {
417: struct linkbuf *lp;
418:
419: if ((lp = savelink(&stb)) != NULL) {
420: /* install link */
421: if (*lp->target == 0)
422: (void) sprintf(buf, "k%o %s %s\n", opts,
423: lp->pathname, rname);
424: else
425: (void) sprintf(buf, "k%o %s/%s %s\n", opts,
426: lp->target, lp->pathname, rname);
427: if (debug)
428: printf("buf = %s", buf);
429: (void) write(rem, buf, strlen(buf));
430: (void) response();
431: return;
432: }
433: }
434:
435: if ((f = open(target, 0)) < 0) {
436: error("%s: %s\n", target, strerror(errno));
437: return;
438: }
439: (void) sprintf(buf, "R%o %o %ld %ld %s %s %s\n", opts,
440: stb.st_mode & 07777, stb.st_size, stb.st_mtime,
441: protoname(), protogroup(), rname);
442: if (debug)
443: printf("buf = %s", buf);
444: (void) write(rem, buf, strlen(buf));
445: if (response() < 0) {
446: (void) close(f);
447: return;
448: }
449: sizerr = 0;
450: for (i = 0; i < stb.st_size; i += BUFSIZ) {
451: int amt = BUFSIZ;
452: if (i + amt > stb.st_size)
453: amt = stb.st_size - i;
454: if (sizerr == 0 && read(f, buf, amt) != amt)
455: sizerr = 1;
456: (void) write(rem, buf, amt);
457: }
458: (void) close(f);
459: done:
460: if (sizerr) {
461: error("%s: file changed size\n", target);
462: err();
463: } else
464: ack();
465: f = response();
466: if (f < 0 || f == 0 && (opts & COMPARE))
467: return;
468: dospecial:
469: for (sc = subcmds; sc != NULL; sc = sc->sc_next) {
470: if (sc->sc_type != SPECIAL)
471: continue;
472: if (sc->sc_args != NULL && !inlist(sc->sc_args, target))
473: continue;
474: log(lfp, "special \"%s\"\n", sc->sc_name);
475: if (opts & VERIFY)
476: continue;
477: (void) sprintf(buf, "SFILE=%s;%s\n", target, sc->sc_name);
478: if (debug)
479: printf("buf = %s", buf);
480: (void) write(rem, buf, strlen(buf));
481: while (response() > 0)
482: ;
483: }
484: }
485:
486: struct linkbuf *
487: savelink(stp)
488: struct stat *stp;
489: {
490: struct linkbuf *lp;
491: int found = 0;
492:
493: for (lp = ihead; lp != NULL; lp = lp->nextp)
494: if (lp->inum == stp->st_ino && lp->devnum == stp->st_dev) {
495: lp->count--;
496: return(lp);
497: }
498: lp = (struct linkbuf *) malloc(sizeof(*lp));
499: if (lp == NULL)
500: log(lfp, "out of memory, link information lost\n");
501: else {
502: lp->nextp = ihead;
503: ihead = lp;
504: lp->inum = stp->st_ino;
505: lp->devnum = stp->st_dev;
506: lp->count = stp->st_nlink - 1;
507: strcpy(lp->pathname, target);
508: if (Tdest)
509: strcpy(lp->target, Tdest);
510: else
511: *lp->target = 0;
512: }
513: return(NULL);
514: }
515:
516: /*
517: * Check to see if file needs to be updated on the remote machine.
518: * Returns 0 if no update, 1 if remote doesn't exist, 2 if out of date
519: * and 3 if comparing binaries to determine if out of date.
520: */
521: update(rname, opts, stp)
522: char *rname;
523: int opts;
524: struct stat *stp;
525: {
526: register char *cp, *s;
527: register off_t size;
528: register time_t mtime;
529:
530: if (debug)
531: printf("update(%s, %x, %x)\n", rname, opts, stp);
532:
533: /*
534: * Check to see if the file exists on the remote machine.
535: */
536: (void) sprintf(buf, "Q%s\n", rname);
537: if (debug)
538: printf("buf = %s", buf);
539: (void) write(rem, buf, strlen(buf));
540: again:
541: cp = s = buf;
542: do {
543: if (read(rem, cp, 1) != 1)
544: lostconn();
545: } while (*cp++ != '\n' && cp < &buf[BUFSIZ]);
546:
547: switch (*s++) {
548: case 'Y':
549: break;
550:
551: case 'N': /* file doesn't exist so install it */
552: return(1);
553:
554: case '\1':
555: nerrs++;
556: if (*s != '\n') {
557: if (!iamremote) {
558: fflush(stdout);
559: (void) write(2, s, cp - s);
560: }
561: if (lfp != NULL)
562: (void) fwrite(s, 1, cp - s, lfp);
563: }
564: return(0);
565:
566: case '\3':
567: *--cp = '\0';
568: if (lfp != NULL)
569: log(lfp, "update: note: %s\n", s);
570: goto again;
571:
572: default:
573: *--cp = '\0';
574: error("update: unexpected response '%s'\n", s);
575: return(0);
576: }
577:
578: if (*s == '\n')
579: return(2);
580:
581: if (opts & COMPARE)
582: return(3);
583:
584: size = 0;
585: while (isdigit(*s))
586: size = size * 10 + (*s++ - '0');
587: if (*s++ != ' ') {
588: error("update: size not delimited\n");
589: return(0);
590: }
591: mtime = 0;
592: while (isdigit(*s))
593: mtime = mtime * 10 + (*s++ - '0');
594: if (*s != '\n') {
595: error("update: mtime not delimited\n");
596: return(0);
597: }
598: /*
599: * File needs to be updated?
600: */
601: if (opts & YOUNGER) {
602: if (stp->st_mtime == mtime)
603: return(0);
604: if (stp->st_mtime < mtime) {
605: log(lfp, "Warning: %s: remote copy is newer\n", target);
606: return(0);
607: }
608: } else if (stp->st_mtime == mtime && stp->st_size == size)
609: return(0);
610: return(2);
611: }
612:
613: /*
614: * Query. Check to see if file exists. Return one of the following:
615: * N\n - doesn't exist
616: * Ysize mtime\n - exists and its a regular file (size & mtime of file)
617: * Y\n - exists and its a directory or symbolic link
618: * ^Aerror message\n
619: */
620: query(name)
621: char *name;
622: {
623: struct stat stb;
624:
625: if (catname)
626: (void) sprintf(tp, "/%s", name);
627:
628: if (lstat(target, &stb) < 0) {
629: if (errno == ENOENT)
630: (void) write(rem, "N\n", 2);
631: else
632: error("%s:%s: %s\n", host, target, strerror(errno));
633: *tp = '\0';
634: return;
635: }
636:
637: switch (stb.st_mode & S_IFMT) {
638: case S_IFREG:
639: (void) sprintf(buf, "Y%ld %ld\n", stb.st_size, stb.st_mtime);
640: (void) write(rem, buf, strlen(buf));
641: break;
642:
643: case S_IFLNK:
644: case S_IFDIR:
645: (void) write(rem, "Y\n", 2);
646: break;
647:
648: default:
649: error("%s: not a file or directory\n", name);
650: break;
651: }
652: *tp = '\0';
653: }
654:
655: recvf(cmd, type)
656: char *cmd;
657: int type;
658: {
659: register char *cp;
660: int f, mode, opts, wrerr, olderrno;
661: off_t i, size;
662: time_t mtime;
663: struct stat stb;
664: struct timeval tvp[2];
665: char *owner, *group;
666: char new[BUFSIZ];
667: extern char *tmpname;
668:
669: cp = cmd;
670: opts = 0;
671: while (*cp >= '0' && *cp <= '7')
672: opts = (opts << 3) | (*cp++ - '0');
673: if (*cp++ != ' ') {
674: error("recvf: options not delimited\n");
675: return;
676: }
677: mode = 0;
678: while (*cp >= '0' && *cp <= '7')
679: mode = (mode << 3) | (*cp++ - '0');
680: if (*cp++ != ' ') {
681: error("recvf: mode not delimited\n");
682: return;
683: }
684: size = 0;
685: while (isdigit(*cp))
686: size = size * 10 + (*cp++ - '0');
687: if (*cp++ != ' ') {
688: error("recvf: size not delimited\n");
689: return;
690: }
691: mtime = 0;
692: while (isdigit(*cp))
693: mtime = mtime * 10 + (*cp++ - '0');
694: if (*cp++ != ' ') {
695: error("recvf: mtime not delimited\n");
696: return;
697: }
698: owner = cp;
699: while (*cp && *cp != ' ')
700: cp++;
701: if (*cp != ' ') {
702: error("recvf: owner name not delimited\n");
703: return;
704: }
705: *cp++ = '\0';
706: group = cp;
707: while (*cp && *cp != ' ')
708: cp++;
709: if (*cp != ' ') {
710: error("recvf: group name not delimited\n");
711: return;
712: }
713: *cp++ = '\0';
714:
715: if (type == S_IFDIR) {
716: if (catname >= sizeof(stp)) {
717: error("%s:%s: too many directory levels\n",
718: host, target);
719: return;
720: }
721: stp[catname] = tp;
722: if (catname++) {
723: *tp++ = '/';
724: while (*tp++ = *cp++)
725: ;
726: tp--;
727: }
728: if (opts & VERIFY) {
729: ack();
730: return;
731: }
732: if (lstat(target, &stb) == 0) {
733: if (ISDIR(stb.st_mode)) {
734: if ((stb.st_mode & 07777) == mode) {
735: ack();
736: return;
737: }
738: buf[0] = '\0';
739: (void) sprintf(buf + 1,
740: "%s: Warning: remote mode %o != local mode %o\n",
741: target, stb.st_mode & 07777, mode);
742: (void) write(rem, buf, strlen(buf + 1) + 1);
743: return;
744: }
745: errno = ENOTDIR;
746: } else if (errno == ENOENT && (mkdir(target, mode) == 0 ||
747: chkparent(target) == 0 && mkdir(target, mode) == 0)) {
748: if (chog(target, owner, group, mode) == 0)
749: ack();
750: return;
751: }
752: error("%s:%s: %s\n", host, target, strerror(errno));
753: tp = stp[--catname];
754: *tp = '\0';
755: return;
756: }
757:
758: if (catname)
759: (void) sprintf(tp, "/%s", cp);
760: cp = rindex(target, '/');
761: if (cp == NULL)
762: strcpy(new, tmpname);
763: else if (cp == target)
764: (void) sprintf(new, "/%s", tmpname);
765: else {
766: *cp = '\0';
767: (void) sprintf(new, "%s/%s", target, tmpname);
768: *cp = '/';
769: }
770:
771: if (type == S_IFLNK) {
772: int j;
773:
774: ack();
775: cp = buf;
776: for (i = 0; i < size; i += j) {
777: if ((j = read(rem, cp, size - i)) <= 0)
778: cleanup();
779: cp += j;
780: }
781: *cp = '\0';
782: if (response() < 0) {
783: err();
784: return;
785: }
786: if (symlink(buf, new) < 0) {
787: if (errno != ENOENT || chkparent(new) < 0 ||
788: symlink(buf, new) < 0)
789: goto badn;
790: }
791: mode &= 0777;
792: if (opts & COMPARE) {
793: char tbuf[BUFSIZ];
794:
795: if ((i = readlink(target, tbuf, BUFSIZ)) >= 0 &&
796: i == size && strncmp(buf, tbuf, size) == 0) {
797: (void) unlink(new);
798: ack();
799: return;
800: }
801: if (opts & VERIFY)
802: goto differ;
803: }
804: goto fixup;
805: }
806:
807: if ((f = creat(new, mode)) < 0) {
808: if (errno != ENOENT || chkparent(new) < 0 ||
809: (f = creat(new, mode)) < 0)
810: goto badn;
811: }
812:
813: ack();
814: wrerr = 0;
815: for (i = 0; i < size; i += BUFSIZ) {
816: int amt = BUFSIZ;
817:
818: cp = buf;
819: if (i + amt > size)
820: amt = size - i;
821: do {
822: int j = read(rem, cp, amt);
823:
824: if (j <= 0) {
825: (void) close(f);
826: (void) unlink(new);
827: cleanup();
828: }
829: amt -= j;
830: cp += j;
831: } while (amt > 0);
832: amt = BUFSIZ;
833: if (i + amt > size)
834: amt = size - i;
835: if (wrerr == 0 && write(f, buf, amt) != amt) {
836: olderrno = errno;
837: wrerr++;
838: }
839: }
840: (void) close(f);
841: if (response() < 0) {
842: err();
843: (void) unlink(new);
844: return;
845: }
846: if (wrerr) {
847: error("%s:%s: %s\n", host, new, strerror(errno));
848: (void) unlink(new);
849: return;
850: }
851: if (opts & COMPARE) {
852: FILE *f1, *f2;
853: int c;
854:
855: if ((f1 = fopen(target, "r")) == NULL)
856: goto badt;
857: if ((f2 = fopen(new, "r")) == NULL) {
858: badn:
859: error("%s:%s: %s\n", host, new, strerror(errno));
860: (void) unlink(new);
861: return;
862: }
863: while ((c = getc(f1)) == getc(f2))
864: if (c == EOF) {
865: (void) fclose(f1);
866: (void) fclose(f2);
867: (void) unlink(new);
868: ack();
869: return;
870: }
871: (void) fclose(f1);
872: (void) fclose(f2);
873: if (opts & VERIFY) {
874: differ:
875: (void) unlink(new);
876: buf[0] = '\0';
877: (void) sprintf(buf + 1, "need to update: %s\n",target);
878: (void) write(rem, buf, strlen(buf + 1) + 1);
879: return;
880: }
881: }
882:
883: /*
884: * Set last modified time
885: */
886: tvp[0].tv_sec = stb.st_atime; /* old atime from target */
887: tvp[0].tv_usec = 0;
888: tvp[1].tv_sec = mtime;
889: tvp[1].tv_usec = 0;
890: if (utimes(new, tvp) < 0) {
891: note("%s:utimes failed %s: %s\n", host, new, strerror(errno));
892: }
893: if (chog(new, owner, group, mode) < 0) {
894: (void) unlink(new);
895: return;
896: }
897: fixup:
898: if (rename(new, target) < 0) {
899: badt:
900: error("%s:%s: %s\n", host, target, strerror(errno));
901: (void) unlink(new);
902: return;
903: }
904: if (opts & COMPARE) {
905: buf[0] = '\0';
906: (void) sprintf(buf + 1, "updated %s\n", target);
907: (void) write(rem, buf, strlen(buf + 1) + 1);
908: } else
909: ack();
910: }
911:
912: /*
913: * Creat a hard link to existing file.
914: */
915: hardlink(cmd)
916: char *cmd;
917: {
918: register char *cp;
919: struct stat stb;
920: char *oldname;
921: int opts, exists = 0;
922:
923: cp = cmd;
924: opts = 0;
925: while (*cp >= '0' && *cp <= '7')
926: opts = (opts << 3) | (*cp++ - '0');
927: if (*cp++ != ' ') {
928: error("hardlink: options not delimited\n");
929: return;
930: }
931: oldname = cp;
932: while (*cp && *cp != ' ')
933: cp++;
934: if (*cp != ' ') {
935: error("hardlink: oldname name not delimited\n");
936: return;
937: }
938: *cp++ = '\0';
939:
940: if (catname) {
941: (void) sprintf(tp, "/%s", cp);
942: }
943: if (lstat(target, &stb) == 0) {
944: int mode = stb.st_mode & S_IFMT;
945: if (mode != S_IFREG && mode != S_IFLNK) {
946: error("%s:%s: not a regular file\n", host, target);
947: return;
948: }
949: exists = 1;
950: }
951: if (chkparent(target) < 0 ) {
952: error("%s:%s: %s (no parent)\n",
953: host, target, strerror(errno));
954: return;
955: }
956: if (exists && (unlink(target) < 0)) {
957: error("%s:%s: %s (unlink)\n",
958: host, target, strerror(errno));
959: return;
960: }
961: if (link(oldname, target) < 0) {
962: error("%s:can't link %s to %s\n",
963: host, target, oldname);
964: return;
965: }
966: ack();
967: }
968:
969: /*
970: * Check to see if parent directory exists and create one if not.
971: */
972: chkparent(name)
973: char *name;
974: {
975: register char *cp;
976: struct stat stb;
977:
978: cp = rindex(name, '/');
979: if (cp == NULL || cp == name)
980: return(0);
981: *cp = '\0';
982: if (lstat(name, &stb) < 0) {
983: if (errno == ENOENT && chkparent(name) >= 0 &&
984: mkdir(name, 0777 & ~oumask) >= 0) {
985: *cp = '/';
986: return(0);
987: }
988: } else if (ISDIR(stb.st_mode)) {
989: *cp = '/';
990: return(0);
991: }
992: *cp = '/';
993: return(-1);
994: }
995:
996: /*
997: * Change owner, group and mode of file.
998: */
999: chog(file, owner, group, mode)
1000: char *file, *owner, *group;
1001: int mode;
1002: {
1003: register int i;
1004: int uid, gid;
1005: extern char user[];
1006: extern int userid;
1007:
1008: uid = userid;
1009: if (userid == 0) {
1010: if (*owner == ':') {
1011: uid = atoi(owner + 1);
1012: } else if (pw == NULL || strcmp(owner, pw->pw_name) != 0) {
1013: if ((pw = getpwnam(owner)) == NULL) {
1014: if (mode & 04000) {
1015: note("%s:%s: unknown login name, clearing setuid",
1016: host, owner);
1017: mode &= ~04000;
1018: uid = 0;
1019: }
1020: } else
1021: uid = pw->pw_uid;
1022: } else
1023: uid = pw->pw_uid;
1024: if (*group == ':') {
1025: gid = atoi(group + 1);
1026: goto ok;
1027: }
1028: } else if ((mode & 04000) && strcmp(user, owner) != 0)
1029: mode &= ~04000;
1030: gid = -1;
1031: if (gr == NULL || strcmp(group, gr->gr_name) != 0) {
1032: if ((*group == ':' && (getgrgid(gid = atoi(group + 1)) == NULL))
1033: || ((gr = getgrnam(group)) == NULL)) {
1034: if (mode & 02000) {
1035: note("%s:%s: unknown group", host, group);
1036: mode &= ~02000;
1037: }
1038: } else
1039: gid = gr->gr_gid;
1040: } else
1041: gid = gr->gr_gid;
1042: if (userid && gid >= 0) {
1043: if (gr) for (i = 0; gr->gr_mem[i] != NULL; i++)
1044: if (!(strcmp(user, gr->gr_mem[i])))
1045: goto ok;
1046: mode &= ~02000;
1047: gid = -1;
1048: }
1049: ok:
1050: if (userid)
1051: setreuid(userid, 0);
1052: if (chown(file, uid, gid) < 0 ||
1053: (mode & 07000) && chmod(file, mode) < 0) {
1054: note("%s: chown or chmod failed: file %s: %s",
1055: host, file, strerror(errno));
1056: }
1057: if (userid)
1058: setreuid(0, userid);
1059: return(0);
1060: }
1061:
1062: /*
1063: * Check for files on the machine being updated that are not on the master
1064: * machine and remove them.
1065: */
1066: rmchk(opts)
1067: int opts;
1068: {
1069: register char *cp, *s;
1070: struct stat stb;
1071:
1072: if (debug)
1073: printf("rmchk()\n");
1074:
1075: /*
1076: * Tell the remote to clean the files from the last directory sent.
1077: */
1078: (void) sprintf(buf, "C%o\n", opts & VERIFY);
1079: if (debug)
1080: printf("buf = %s", buf);
1081: (void) write(rem, buf, strlen(buf));
1082: if (response() < 0)
1083: return;
1084: for (;;) {
1085: cp = s = buf;
1086: do {
1087: if (read(rem, cp, 1) != 1)
1088: lostconn();
1089: } while (*cp++ != '\n' && cp < &buf[BUFSIZ]);
1090:
1091: switch (*s++) {
1092: case 'Q': /* Query if file should be removed */
1093: /*
1094: * Return the following codes to remove query.
1095: * N\n -- file exists - DON'T remove.
1096: * Y\n -- file doesn't exist - REMOVE.
1097: */
1098: *--cp = '\0';
1099: (void) sprintf(tp, "/%s", s);
1100: if (debug)
1101: printf("check %s\n", target);
1102: if (except(target))
1103: (void) write(rem, "N\n", 2);
1104: else if (lstat(target, &stb) < 0)
1105: (void) write(rem, "Y\n", 2);
1106: else
1107: (void) write(rem, "N\n", 2);
1108: break;
1109:
1110: case '\0':
1111: *--cp = '\0';
1112: if (*s != '\0')
1113: log(lfp, "%s\n", s);
1114: break;
1115:
1116: case 'E':
1117: *tp = '\0';
1118: ack();
1119: return;
1120:
1121: case '\1':
1122: case '\2':
1123: nerrs++;
1124: if (*s != '\n') {
1125: if (!iamremote) {
1126: fflush(stdout);
1127: (void) write(2, s, cp - s);
1128: }
1129: if (lfp != NULL)
1130: (void) fwrite(s, 1, cp - s, lfp);
1131: }
1132: if (buf[0] == '\2')
1133: lostconn();
1134: break;
1135:
1136: default:
1137: error("rmchk: unexpected response '%s'\n", buf);
1138: err();
1139: }
1140: }
1141: }
1142:
1143: /*
1144: * Check the current directory (initialized by the 'T' command to server())
1145: * for extraneous files and remove them.
1146: */
1147: clean(cp)
1148: register char *cp;
1149: {
1150: DIR *d;
1151: register struct direct *dp;
1152: struct stat stb;
1153: char *otp;
1154: int len, opts;
1155:
1156: opts = 0;
1157: while (*cp >= '0' && *cp <= '7')
1158: opts = (opts << 3) | (*cp++ - '0');
1159: if (*cp != '\0') {
1160: error("clean: options not delimited\n");
1161: return;
1162: }
1163: if ((d = opendir(target)) == NULL) {
1164: error("%s:%s: %s\n", host, target, strerror(errno));
1165: return;
1166: }
1167: ack();
1168:
1169: otp = tp;
1170: len = tp - target;
1171: while (dp = readdir(d)) {
1172: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
1173: continue;
1174: if (len + 1 + strlen(dp->d_name) >= BUFSIZ - 1) {
1175: error("%s:%s/%s: Name too long\n",
1176: host, target, dp->d_name);
1177: continue;
1178: }
1179: tp = otp;
1180: *tp++ = '/';
1181: cp = dp->d_name;;
1182: while (*tp++ = *cp++)
1183: ;
1184: tp--;
1185: if (lstat(target, &stb) < 0) {
1186: error("%s:%s: %s\n", host, target, strerror(errno));
1187: continue;
1188: }
1189: (void) sprintf(buf, "Q%s\n", dp->d_name);
1190: (void) write(rem, buf, strlen(buf));
1191: cp = buf;
1192: do {
1193: if (read(rem, cp, 1) != 1)
1194: cleanup();
1195: } while (*cp++ != '\n' && cp < &buf[BUFSIZ]);
1196: *--cp = '\0';
1197: cp = buf;
1198: if (*cp != 'Y')
1199: continue;
1200: if (opts & VERIFY) {
1201: cp = buf;
1202: *cp++ = '\0';
1203: (void) sprintf(cp, "need to remove: %s\n", target);
1204: (void) write(rem, buf, strlen(cp) + 1);
1205: } else
1206: remove(&stb);
1207: }
1208: closedir(d);
1209: (void) write(rem, "E\n", 2);
1210: (void) response();
1211: tp = otp;
1212: *tp = '\0';
1213: }
1214:
1215: /*
1216: * Remove a file or directory (recursively) and send back an acknowledge
1217: * or an error message.
1218: */
1219: remove(stp)
1220: struct stat *stp;
1221: {
1222: DIR *d;
1223: struct direct *dp;
1224: register char *cp;
1225: struct stat stb;
1226: char *otp;
1227: int len;
1228:
1229: switch (stp->st_mode & S_IFMT) {
1230: case S_IFREG:
1231: case S_IFLNK:
1232: if (unlink(target) < 0)
1233: goto bad;
1234: goto removed;
1235:
1236: case S_IFDIR:
1237: break;
1238:
1239: default:
1240: error("%s:%s: not a plain file\n", host, target);
1241: return;
1242: }
1243:
1244: if ((d = opendir(target)) == NULL)
1245: goto bad;
1246:
1247: otp = tp;
1248: len = tp - target;
1249: while (dp = readdir(d)) {
1250: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
1251: continue;
1252: if (len + 1 + strlen(dp->d_name) >= BUFSIZ - 1) {
1253: error("%s:%s/%s: Name too long\n",
1254: host, target, dp->d_name);
1255: continue;
1256: }
1257: tp = otp;
1258: *tp++ = '/';
1259: cp = dp->d_name;;
1260: while (*tp++ = *cp++)
1261: ;
1262: tp--;
1263: if (lstat(target, &stb) < 0) {
1264: error("%s:%s: %s\n", host, target, strerror(errno));
1265: continue;
1266: }
1267: remove(&stb);
1268: }
1269: closedir(d);
1270: tp = otp;
1271: *tp = '\0';
1272: if (rmdir(target) < 0) {
1273: bad:
1274: error("%s:%s: %s\n", host, target, strerror(errno));
1275: return;
1276: }
1277: removed:
1278: cp = buf;
1279: *cp++ = '\0';
1280: (void) sprintf(cp, "removed %s\n", target);
1281: (void) write(rem, buf, strlen(cp) + 1);
1282: }
1283:
1284: /*
1285: * Execute a shell command to handle special cases.
1286: */
1287: dospecial(cmd)
1288: char *cmd;
1289: {
1290: int fd[2], status, pid, i;
1291: register char *cp, *s;
1292: char sbuf[BUFSIZ];
1293: extern int userid, groupid;
1294:
1295: if (pipe(fd) < 0) {
1296: error("%s\n", strerror(errno));
1297: return;
1298: }
1299: if ((pid = fork()) == 0) {
1300: /*
1301: * Return everything the shell commands print.
1302: */
1303: (void) close(0);
1304: (void) close(1);
1305: (void) close(2);
1306: (void) open(_PATH_DEVNULL, O_RDONLY);
1307: (void) dup(fd[1]);
1308: (void) dup(fd[1]);
1309: (void) close(fd[0]);
1310: (void) close(fd[1]);
1311: setgid(groupid);
1312: setuid(userid);
1313: execl(_PATH_BSHELL, "sh", "-c", cmd, 0);
1314: _exit(127);
1315: }
1316: (void) close(fd[1]);
1317: s = sbuf;
1318: *s++ = '\0';
1319: while ((i = read(fd[0], buf, sizeof(buf))) > 0) {
1320: cp = buf;
1321: do {
1322: *s++ = *cp++;
1323: if (cp[-1] != '\n') {
1324: if (s < &sbuf[sizeof(sbuf)-1])
1325: continue;
1326: *s++ = '\n';
1327: }
1328: /*
1329: * Throw away blank lines.
1330: */
1331: if (s == &sbuf[2]) {
1332: s--;
1333: continue;
1334: }
1335: (void) write(rem, sbuf, s - sbuf);
1336: s = &sbuf[1];
1337: } while (--i);
1338: }
1339: if (s > &sbuf[1]) {
1340: *s++ = '\n';
1341: (void) write(rem, sbuf, s - sbuf);
1342: }
1343: while ((i = wait(&status)) != pid && i != -1)
1344: ;
1345: if (i == -1)
1346: status = -1;
1347: (void) close(fd[0]);
1348: if (status)
1349: error("shell returned %d\n", status);
1350: else
1351: ack();
1352: }
1353:
1354: /*VARARGS2*/
1355: log(fp, fmt, a1, a2, a3)
1356: FILE *fp;
1357: char *fmt;
1358: int a1, a2, a3;
1359: {
1360: /* Print changes locally if not quiet mode */
1361: if (!qflag)
1362: printf(fmt, a1, a2, a3);
1363:
1364: /* Save changes (for mailing) if really updating files */
1365: if (!(options & VERIFY) && fp != NULL)
1366: fprintf(fp, fmt, a1, a2, a3);
1367: }
1368:
1369: /*VARARGS1*/
1370: error(fmt, a1, a2, a3)
1371: char *fmt;
1372: int a1, a2, a3;
1373: {
1374: static FILE *fp;
1375:
1376: ++nerrs;
1377: if (!fp && !(fp = fdopen(rem, "w")))
1378: return;
1379: if (iamremote) {
1380: (void)fprintf(fp, "%crdist: ", 0x01);
1381: (void)fprintf(fp, fmt, a1, a2, a3);
1382: fflush(fp);
1383: }
1384: else {
1385: fflush(stdout);
1386: (void)fprintf(stderr, "rdist: ");
1387: (void)fprintf(stderr, fmt, a1, a2, a3);
1388: fflush(stderr);
1389: }
1390: if (lfp != NULL) {
1391: (void)fprintf(lfp, "rdist: ");
1392: (void)fprintf(lfp, fmt, a1, a2, a3);
1393: fflush(lfp);
1394: }
1395: }
1396:
1397: /*VARARGS1*/
1398: fatal(fmt, a1, a2,a3)
1399: char *fmt;
1400: int a1, a2, a3;
1401: {
1402: static FILE *fp;
1403:
1404: ++nerrs;
1405: if (!fp && !(fp = fdopen(rem, "w")))
1406: return;
1407: if (iamremote) {
1408: (void)fprintf(fp, "%crdist: ", 0x02);
1409: (void)fprintf(fp, fmt, a1, a2, a3);
1410: fflush(fp);
1411: }
1412: else {
1413: fflush(stdout);
1414: (void)fprintf(stderr, "rdist: ");
1415: (void)fprintf(stderr, fmt, a1, a2, a3);
1416: fflush(stderr);
1417: }
1418: if (lfp != NULL) {
1419: (void)fprintf(lfp, "rdist: ");
1420: (void)fprintf(lfp, fmt, a1, a2, a3);
1421: fflush(lfp);
1422: }
1423: cleanup();
1424: }
1425:
1426: response()
1427: {
1428: char *cp, *s;
1429: char resp[BUFSIZ];
1430:
1431: if (debug)
1432: printf("response()\n");
1433:
1434: cp = s = resp;
1435: do {
1436: if (read(rem, cp, 1) != 1)
1437: lostconn();
1438: } while (*cp++ != '\n' && cp < &resp[BUFSIZ]);
1439:
1440: switch (*s++) {
1441: case '\0':
1442: *--cp = '\0';
1443: if (*s != '\0') {
1444: log(lfp, "%s\n", s);
1445: return(1);
1446: }
1447: return(0);
1448: case '\3':
1449: *--cp = '\0';
1450: log(lfp, "Note: %s\n",s);
1451: return(response());
1452:
1453: default:
1454: s--;
1455: /* fall into... */
1456: case '\1':
1457: case '\2':
1458: nerrs++;
1459: if (*s != '\n') {
1460: if (!iamremote) {
1461: fflush(stdout);
1462: (void) write(2, s, cp - s);
1463: }
1464: if (lfp != NULL)
1465: (void) fwrite(s, 1, cp - s, lfp);
1466: }
1467: if (resp[0] == '\2')
1468: lostconn();
1469: return(-1);
1470: }
1471: }
1472:
1473: /*
1474: * Remove temporary files and do any cleanup operations before exiting.
1475: */
1476: cleanup()
1477: {
1478: (void) unlink(tmpfile);
1479: exit(1);
1480: }
1481:
1482: note(fmt, a1, a2, a3)
1483: {
1484: static char buf[BUFSIZ];
1485: sprintf(buf, fmt, a1, a2, a3);
1486: comment(buf);
1487: }
1488:
1489: comment(s)
1490: char *s;
1491: {
1492: char c = '\3';
1493: write(rem, &c, 1);
1494: write(rem, s, strlen(s));
1495: c = '\n';
1496: write(rem, &c, 1);
1497: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.