Commit | Line | Data |
---|---|---|
8c28b243 TL |
1 | #include <stdio.h> |
2 | #include <sys/types.h> | |
3 | #include <sys/stat.h> | |
4 | #include <sys/dir.h> | |
5 | #include <signal.h> | |
6 | ||
7 | char *sprintf(); | |
8 | char *strcat(); | |
9 | daddr_t bsrch(); | |
10 | #define TBLOCK 512 | |
11 | #define NBLOCK 20 | |
12 | #define NAMSIZ 100 | |
13 | union hblock { | |
14 | char dummy[TBLOCK]; | |
15 | struct header { | |
16 | char name[NAMSIZ]; | |
17 | char mode[8]; | |
18 | char uid[8]; | |
19 | char gid[8]; | |
20 | char size[12]; | |
21 | char mtime[12]; | |
22 | char chksum[8]; | |
23 | char linkflag; | |
24 | char linkname[NAMSIZ]; | |
25 | } dbuf; | |
26 | } dblock, tbuf[NBLOCK]; | |
27 | ||
28 | struct linkbuf { | |
29 | ino_t inum; | |
30 | dev_t devnum; | |
31 | int count; | |
32 | char pathname[NAMSIZ]; | |
33 | struct linkbuf *nextp; | |
34 | } *ihead; | |
35 | ||
36 | struct stat stbuf; | |
37 | ||
38 | int rflag, xflag, vflag, tflag, mt, cflag, mflag; | |
39 | int term, chksum, wflag, recno, first, linkerrok; | |
40 | int freemem = 1; | |
41 | int nblock = 1; | |
42 | ||
43 | daddr_t low; | |
44 | daddr_t high; | |
45 | ||
46 | FILE *tfile; | |
47 | char tname[] = "/tmp/tarXXXXXX"; | |
48 | ||
49 | ||
50 | char *usefile; | |
51 | char magtape[] = "/dev/mt1"; | |
52 | ||
53 | char *malloc(); | |
54 | ||
55 | main(argc, argv) | |
56 | int argc; | |
57 | char *argv[]; | |
58 | { | |
59 | char *cp; | |
60 | int onintr(), onquit(), onhup(), onterm(); | |
61 | ||
62 | if (argc < 2) | |
63 | usage(); | |
64 | ||
65 | tfile = NULL; | |
66 | usefile = magtape; | |
67 | argv[argc] = 0; | |
68 | argv++; | |
69 | for (cp = *argv++; *cp; cp++) | |
70 | switch(*cp) { | |
71 | case 'f': | |
72 | usefile = *argv++; | |
73 | break; | |
74 | case 'c': | |
75 | cflag++; | |
76 | rflag++; | |
77 | break; | |
78 | case 'u': | |
79 | mktemp(tname); | |
80 | if ((tfile = fopen(tname, "w")) == NULL) { | |
81 | fprintf(stderr, "Tar: cannot create temporary file (%s)\n", tname); | |
82 | done(1); | |
83 | } | |
84 | fprintf(tfile, "!!!!!/!/!/!/!/!/!/! 000\n"); | |
85 | /* FALL THROUGH */ | |
86 | case 'r': | |
87 | rflag++; | |
88 | if (nblock != 1) { | |
89 | noupdate: | |
90 | fprintf(stderr, "Blocked tapes cannot be updated (yet)\n"); | |
91 | done(1); | |
92 | } | |
93 | break; | |
94 | case 'v': | |
95 | vflag++; | |
96 | break; | |
97 | case 'w': | |
98 | wflag++; | |
99 | break; | |
100 | case 'x': | |
101 | xflag++; | |
102 | break; | |
103 | case 't': | |
104 | tflag++; | |
105 | break; | |
106 | case 'm': | |
107 | mflag++; | |
108 | break; | |
109 | case '-': | |
110 | break; | |
111 | case '0': | |
112 | case '1': | |
113 | magtape[7] = *cp; | |
114 | usefile = magtape; | |
115 | break; | |
116 | case 'b': | |
117 | nblock = atoi(*argv++); | |
118 | if (nblock > NBLOCK || nblock <= 0) { | |
119 | fprintf(stderr, "Invalid blocksize. (Max %d)\n", NBLOCK); | |
120 | done(1); | |
121 | } | |
122 | if (rflag && !cflag) | |
123 | goto noupdate; | |
124 | break; | |
125 | case 'l': | |
126 | linkerrok++; | |
127 | break; | |
128 | default: | |
129 | fprintf(stderr, "tar: %c: unknown option\n", *cp); | |
130 | usage(); | |
131 | } | |
132 | ||
133 | if (rflag) { | |
134 | if (cflag && tfile != NULL) { | |
135 | usage(); | |
136 | done(1); | |
137 | } | |
138 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) | |
139 | signal(SIGINT, onintr); | |
140 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) | |
141 | signal(SIGHUP, onhup); | |
142 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) | |
143 | signal(SIGQUIT, onquit); | |
144 | /* | |
145 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) | |
146 | signal(SIGTERM, onterm); | |
147 | */ | |
148 | if (strcmp(usefile, "-") == 0) { | |
149 | if (cflag == 0) { | |
150 | fprintf(stderr, "Can only create standard output archives\n"); | |
151 | done(1); | |
152 | } | |
153 | mt = dup(1); | |
154 | } | |
155 | else if ((mt = open(usefile, 2)) < 0) { | |
156 | if (cflag == 0 || (mt = creat(usefile, 0666)) < 0) { | |
157 | fprintf(stderr, "tar: cannot open %s\n", usefile); | |
158 | done(1); | |
159 | } | |
160 | } | |
161 | dorep(argv); | |
162 | } | |
163 | else if (xflag) { | |
164 | if (strcmp(usefile, "-") == 0) | |
165 | mt = dup(0); | |
166 | else if ((mt = open(usefile, 0)) < 0) { | |
167 | fprintf(stderr, "tar: cannot open %s\n", usefile); | |
168 | done(1); | |
169 | } | |
170 | doxtract(argv); | |
171 | } | |
172 | else if (tflag) { | |
173 | if ((mt = open(usefile, 0)) < 0) { | |
174 | fprintf(stderr, "tar: cannot open %s\n", usefile); | |
175 | done(1); | |
176 | } | |
177 | dotable(); | |
178 | } | |
179 | else | |
180 | usage(); | |
181 | done(0); | |
182 | } | |
183 | ||
184 | usage() | |
185 | { | |
186 | fprintf(stderr, "tar: usage tar -{txru}[cvfblm] [tapefile] [blocksize] file1 file2...\n"); | |
187 | done(1); | |
188 | } | |
189 | ||
190 | dorep(argv) | |
191 | char *argv[]; | |
192 | { | |
193 | register char *cp, *cp2; | |
194 | char wdir[60]; | |
195 | ||
196 | if (!cflag) { | |
197 | getdir(); | |
198 | do { | |
199 | passtape(); | |
200 | getdir(); | |
201 | } while (!endtape()); | |
202 | if (tfile != NULL) { | |
203 | char buf[200]; | |
204 | ||
205 | strcat(buf, "sort +0 -1 +1nr "); | |
206 | strcat(buf, tname); | |
207 | strcat(buf, " -o "); | |
208 | strcat(buf, tname); | |
209 | sprintf(buf, "sort +0 -1 +1nr %s -o %s; awk '$1 != prev {print; prev=$1}' %s >%sX;mv %sX %s", | |
210 | tname, tname, tname, tname, tname, tname); | |
211 | fflush(tfile); | |
212 | system(buf); | |
213 | freopen(tname, "r", tfile); | |
214 | fstat(fileno(tfile), &stbuf); | |
215 | high = stbuf.st_size; | |
216 | } | |
217 | } | |
218 | ||
219 | getwdir(wdir); | |
220 | while (*argv && ! term) { | |
221 | cp2 = *argv; | |
222 | for (cp = *argv; *cp; cp++) | |
223 | if (*cp == '/') | |
224 | cp2 = cp; | |
225 | if (cp2 != *argv) { | |
226 | *cp2 = '\0'; | |
227 | chdir(*argv); | |
228 | *cp2 = '/'; | |
229 | cp2++; | |
230 | } | |
231 | putfile(*argv++, cp2); | |
232 | chdir(wdir); | |
233 | } | |
234 | putempty(); | |
235 | putempty(); | |
236 | flushtape(); | |
237 | if (linkerrok == 1) | |
238 | for (; ihead != NULL; ihead = ihead->nextp) | |
239 | if (ihead->count != 0) | |
240 | fprintf(stderr, "Missing links to %s\n", ihead->pathname); | |
241 | } | |
242 | ||
243 | endtape() | |
244 | { | |
245 | if (dblock.dbuf.name[0] == '\0') { | |
246 | backtape(); | |
247 | return(1); | |
248 | } | |
249 | else | |
250 | return(0); | |
251 | } | |
252 | ||
253 | getdir() | |
254 | { | |
255 | register struct stat *sp; | |
256 | int i; | |
257 | ||
258 | readtape( (char *) &dblock); | |
259 | if (dblock.dbuf.name[0] == '\0') | |
260 | return; | |
261 | sp = &stbuf; | |
262 | sscanf(dblock.dbuf.mode, "%o", &i); | |
263 | sp->st_mode = i; | |
264 | sscanf(dblock.dbuf.uid, "%o", &i); | |
265 | sp->st_uid = i; | |
266 | sscanf(dblock.dbuf.gid, "%o", &i); | |
267 | sp->st_gid = i; | |
268 | sscanf(dblock.dbuf.size, "%lo", &sp->st_size); | |
269 | sscanf(dblock.dbuf.mtime, "%lo", &sp->st_mtime); | |
270 | sscanf(dblock.dbuf.chksum, "%o", &chksum); | |
271 | if (chksum != checksum()) { | |
272 | fprintf(stderr, "directory checksum error\n"); | |
273 | done(2); | |
274 | } | |
275 | if (tfile != NULL) | |
276 | fprintf(tfile, "%s %s\n", dblock.dbuf.name, dblock.dbuf.mtime); | |
277 | } | |
278 | ||
279 | passtape() | |
280 | { | |
281 | long blocks; | |
282 | char buf[TBLOCK]; | |
283 | ||
284 | if (dblock.dbuf.linkflag == '1') | |
285 | return; | |
286 | blocks = stbuf.st_size; | |
287 | blocks += TBLOCK-1; | |
288 | blocks /= TBLOCK; | |
289 | ||
290 | while (blocks-- > 0) | |
291 | readtape(buf); | |
292 | } | |
293 | ||
294 | putfile(longname, shortname) | |
295 | char *longname; | |
296 | char *shortname; | |
297 | { | |
298 | int infile; | |
299 | long blocks; | |
300 | char buf[TBLOCK]; | |
301 | register char *cp, *cp2; | |
302 | struct direct dbuf; | |
303 | int i, j; | |
304 | ||
305 | infile = open(shortname, 0); | |
306 | if (infile < 0) { | |
307 | fprintf(stderr, "tar: %s: cannot open file\n", longname); | |
308 | return; | |
309 | } | |
310 | ||
311 | fstat(infile, &stbuf); | |
312 | ||
313 | if (tfile != NULL && checkupdate(longname) == 0) { | |
314 | close(infile); | |
315 | return; | |
316 | } | |
317 | if (checkw('r', shortname) == 0) { | |
318 | close(infile); | |
319 | return; | |
320 | } | |
321 | ||
322 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { | |
323 | for (i = 0, cp = buf; *cp++ = longname[i++];); | |
324 | *--cp = '/'; | |
325 | cp++; | |
326 | i = 0; | |
327 | chdir(shortname); | |
328 | while (read(infile, (char *)&dbuf, sizeof(dbuf)) > 0 && !term) { | |
329 | if (dbuf.d_ino == 0) { | |
330 | i++; | |
331 | continue; | |
332 | } | |
333 | if (strcmp(".", dbuf.d_name) == 0 || strcmp("..", dbuf.d_name) == 0) { | |
334 | i++; | |
335 | continue; | |
336 | } | |
337 | cp2 = cp; | |
338 | for (j=0; j < DIRSIZ; j++) | |
339 | *cp2++ = dbuf.d_name[j]; | |
340 | *cp2 = '\0'; | |
341 | close(infile); | |
342 | putfile(buf, cp); | |
343 | infile = open(".", 0); | |
344 | i++; | |
345 | lseek(infile, (long) (sizeof(dbuf) * i), 0); | |
346 | } | |
347 | close(infile); | |
348 | chdir(".."); | |
349 | return; | |
350 | } | |
351 | if ((stbuf.st_mode & S_IFMT) != S_IFREG) { | |
352 | fprintf(stderr, "tar: %s is not a file. Not dumped\n", longname); | |
353 | return; | |
354 | } | |
355 | ||
356 | tomodes(&stbuf); | |
357 | ||
358 | cp2 = longname; | |
359 | for (cp = dblock.dbuf.name, i=0; (*cp++ = *cp2++) && i < NAMSIZ; i++); | |
360 | if (i >= NAMSIZ) { | |
361 | fprintf(stderr, "%s: file name too long\n", longname); | |
362 | close(infile); | |
363 | return; | |
364 | } | |
365 | ||
366 | if (stbuf.st_nlink > 1) { | |
367 | struct linkbuf *lp; | |
368 | int found = 0; | |
369 | ||
370 | for (lp = ihead; lp != NULL; lp = lp->nextp) { | |
371 | if (lp->inum == stbuf.st_ino && lp->devnum == stbuf.st_dev) { | |
372 | found++; | |
373 | break; | |
374 | } | |
375 | } | |
376 | if (found) { | |
377 | strcpy(dblock.dbuf.linkname, lp->pathname); | |
378 | dblock.dbuf.linkflag = '1'; | |
379 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); | |
380 | writetape( (char *) &dblock); | |
381 | if (vflag) { | |
382 | fprintf(stderr, "a %s ", longname); | |
383 | fprintf(stderr, "link to %s\n", lp->pathname); | |
384 | } | |
385 | lp->count--; | |
386 | close(infile); | |
387 | return; | |
388 | } | |
389 | else { | |
390 | lp = (struct linkbuf *) malloc(sizeof(*lp)); | |
391 | if (lp == NULL) { | |
392 | if (freemem) { | |
393 | fprintf(stderr, "Out of memory. Link information lost\n"); | |
394 | freemem = 0; | |
395 | } | |
396 | } | |
397 | else { | |
398 | lp->nextp = ihead; | |
399 | ihead = lp; | |
400 | lp->inum = stbuf.st_ino; | |
401 | lp->devnum = stbuf.st_dev; | |
402 | lp->count = stbuf.st_nlink - 1; | |
403 | strcpy(lp->pathname, longname); | |
404 | } | |
405 | } | |
406 | } | |
407 | ||
408 | blocks = (stbuf.st_size + (TBLOCK-1)) / TBLOCK; | |
409 | if (vflag) { | |
410 | fprintf(stderr, "a %s ", longname); | |
411 | fprintf(stderr, "%ld blocks\n", blocks); | |
412 | } | |
413 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); | |
414 | writetape( (char *) &dblock); | |
415 | ||
416 | while ((i = read(infile, buf, TBLOCK)) > 0 && blocks > 0) { | |
417 | writetape(buf); | |
418 | blocks--; | |
419 | } | |
420 | close(infile); | |
421 | if (blocks != 0 || i != 0) | |
422 | fprintf(stderr, "%s: file changed size\n", longname); | |
423 | while (blocks-- > 0) | |
424 | putempty(); | |
425 | } | |
426 | ||
427 | ||
428 | ||
429 | doxtract(argv) | |
430 | char *argv[]; | |
431 | { | |
432 | long blocks, bytes; | |
433 | char buf[TBLOCK]; | |
434 | char **cp; | |
435 | int ofile; | |
436 | ||
437 | for (;;) { | |
438 | getdir(); | |
439 | if (endtape()) | |
440 | break; | |
441 | ||
442 | if (*argv == 0) | |
443 | goto gotit; | |
444 | ||
445 | for (cp = argv; *cp; cp++) | |
446 | if (prefix(*cp, dblock.dbuf.name)) | |
447 | goto gotit; | |
448 | passtape(); | |
449 | continue; | |
450 | ||
451 | gotit: | |
452 | if (checkw('x', dblock.dbuf.name) == 0) { | |
453 | passtape(); | |
454 | continue; | |
455 | } | |
456 | ||
457 | checkdir(dblock.dbuf.name); | |
458 | ||
459 | if (dblock.dbuf.linkflag == '1') { | |
460 | unlink(dblock.dbuf.name); | |
461 | if (link(dblock.dbuf.linkname, dblock.dbuf.name) < 0) { | |
462 | fprintf(stderr, "%s: cannot link\n", dblock.dbuf.name); | |
463 | continue; | |
464 | } | |
465 | if (vflag) | |
466 | fprintf(stderr, "%s linked to %s\n", dblock.dbuf.name, dblock.dbuf.linkname); | |
467 | continue; | |
468 | } | |
469 | if ((ofile = creat(dblock.dbuf.name, stbuf.st_mode & 07777)) < 0) { | |
470 | fprintf(stderr, "tar: %s - cannot create\n", dblock.dbuf.name); | |
471 | passtape(); | |
472 | continue; | |
473 | } | |
474 | ||
475 | chown(dblock.dbuf.name, stbuf.st_uid, stbuf.st_gid); | |
476 | ||
477 | blocks = ((bytes = stbuf.st_size) + TBLOCK-1)/TBLOCK; | |
478 | if (vflag) | |
479 | fprintf(stderr, "x %s, %ld bytes, %ld tape blocks\n", dblock.dbuf.name, bytes, blocks); | |
480 | while (blocks-- > 0) { | |
481 | readtape(buf); | |
482 | if (bytes > TBLOCK) { | |
483 | if (write(ofile, buf, TBLOCK) < 0) { | |
484 | fprintf(stderr, "tar: %s: HELP - extract write error\n", dblock.dbuf.name); | |
485 | done(2); | |
486 | } | |
487 | } else | |
488 | if (write(ofile, buf, (int) bytes) < 0) { | |
489 | fprintf(stderr, "tar: %s: HELP - extract write error\n", dblock.dbuf.name); | |
490 | done(2); | |
491 | } | |
492 | bytes -= TBLOCK; | |
493 | } | |
494 | close(ofile); | |
495 | if (mflag == 0) { | |
496 | time_t timep[2]; | |
497 | ||
498 | timep[0] = time(NULL); | |
499 | timep[1] = stbuf.st_mtime; | |
500 | utime(dblock.dbuf.name, timep); | |
501 | } | |
502 | } | |
503 | } | |
504 | ||
505 | dotable() | |
506 | { | |
507 | for (;;) { | |
508 | getdir(); | |
509 | if (endtape()) | |
510 | break; | |
511 | if (vflag) | |
512 | longt(&stbuf); | |
513 | printf("%s", dblock.dbuf.name); | |
514 | if (dblock.dbuf.linkflag == '1') | |
515 | printf(" linked to %s", dblock.dbuf.linkname); | |
516 | printf("\n"); | |
517 | passtape(); | |
518 | } | |
519 | } | |
520 | ||
521 | putempty() | |
522 | { | |
523 | char buf[TBLOCK]; | |
524 | char *cp; | |
525 | ||
526 | for (cp = buf; cp < &buf[TBLOCK]; ) | |
527 | *cp++ = '\0'; | |
528 | writetape(buf); | |
529 | } | |
530 | ||
531 | longt(st) | |
532 | register struct stat *st; | |
533 | { | |
534 | register char *cp; | |
535 | char *ctime(); | |
536 | ||
537 | pmode(st); | |
538 | printf("%3d/%1d", st->st_uid, st->st_gid); | |
539 | printf("%7D", st->st_size); | |
540 | cp = ctime(&st->st_mtime); | |
541 | printf(" %-12.12s %-4.4s ", cp+4, cp+20); | |
542 | } | |
543 | ||
544 | #define SUID 04000 | |
545 | #define SGID 02000 | |
546 | #define ROWN 0400 | |
547 | #define WOWN 0200 | |
548 | #define XOWN 0100 | |
549 | #define RGRP 040 | |
550 | #define WGRP 020 | |
551 | #define XGRP 010 | |
552 | #define ROTH 04 | |
553 | #define WOTH 02 | |
554 | #define XOTH 01 | |
555 | #define STXT 01000 | |
556 | int m1[] = { 1, ROWN, 'r', '-' }; | |
557 | int m2[] = { 1, WOWN, 'w', '-' }; | |
558 | int m3[] = { 2, SUID, 's', XOWN, 'x', '-' }; | |
559 | int m4[] = { 1, RGRP, 'r', '-' }; | |
560 | int m5[] = { 1, WGRP, 'w', '-' }; | |
561 | int m6[] = { 2, SGID, 's', XGRP, 'x', '-' }; | |
562 | int m7[] = { 1, ROTH, 'r', '-' }; | |
563 | int m8[] = { 1, WOTH, 'w', '-' }; | |
564 | int m9[] = { 2, STXT, 't', XOTH, 'x', '-' }; | |
565 | ||
566 | int *m[] = { m1, m2, m3, m4, m5, m6, m7, m8, m9}; | |
567 | ||
568 | pmode(st) | |
569 | register struct stat *st; | |
570 | { | |
571 | register int **mp; | |
572 | ||
573 | for (mp = &m[0]; mp < &m[9];) | |
574 | select(*mp++, st); | |
575 | } | |
576 | ||
577 | select(pairp, st) | |
578 | int *pairp; | |
579 | struct stat *st; | |
580 | { | |
581 | register int n, *ap; | |
582 | ||
583 | ap = pairp; | |
584 | n = *ap++; | |
585 | while (--n>=0 && (st->st_mode&*ap++)==0) | |
586 | ap++; | |
587 | printf("%c", *ap); | |
588 | } | |
589 | ||
590 | checkdir(name) | |
591 | register char *name; | |
592 | { | |
593 | register char *cp; | |
594 | int i; | |
595 | for (cp = name; *cp; cp++) { | |
596 | if (*cp == '/') { | |
597 | *cp = '\0'; | |
598 | if (access(name, 01) < 0) { | |
599 | if (fork() == 0) { | |
600 | execl("/bin/mkdir", "mkdir", name, 0); | |
601 | execl("/usr/bin/mkdir", "mkdir", name, 0); | |
602 | fprintf(stderr, "tar: cannot find mkdir!\n"); | |
603 | done(0); | |
604 | } | |
605 | while (wait(&i) >= 0); | |
606 | chown(name, stbuf.st_uid, stbuf.st_gid); | |
607 | } | |
608 | *cp = '/'; | |
609 | } | |
610 | } | |
611 | } | |
612 | ||
613 | onintr() | |
614 | { | |
615 | signal(SIGINT, SIG_IGN); | |
616 | term++; | |
617 | } | |
618 | ||
619 | onquit() | |
620 | { | |
621 | signal(SIGQUIT, SIG_IGN); | |
622 | term++; | |
623 | } | |
624 | ||
625 | onhup() | |
626 | { | |
627 | signal(SIGHUP, SIG_IGN); | |
628 | term++; | |
629 | } | |
630 | ||
631 | onterm() | |
632 | { | |
633 | signal(SIGTERM, SIG_IGN); | |
634 | term++; | |
635 | } | |
636 | ||
637 | tomodes(sp) | |
638 | register struct stat *sp; | |
639 | { | |
640 | register char *cp; | |
641 | ||
642 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) | |
643 | *cp = '\0'; | |
644 | sprintf(dblock.dbuf.mode, "%6o ", sp->st_mode & 07777); | |
645 | sprintf(dblock.dbuf.uid, "%6o ", sp->st_uid); | |
646 | sprintf(dblock.dbuf.gid, "%6o ", sp->st_gid); | |
647 | sprintf(dblock.dbuf.size, "%11lo ", sp->st_size); | |
648 | sprintf(dblock.dbuf.mtime, "%11lo ", sp->st_mtime); | |
649 | } | |
650 | ||
651 | checksum() | |
652 | { | |
653 | register i; | |
654 | register char *cp; | |
655 | ||
656 | for (cp = dblock.dbuf.chksum; cp < &dblock.dbuf.chksum[sizeof(dblock.dbuf.chksum)]; cp++) | |
657 | *cp = ' '; | |
658 | i = 0; | |
659 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) | |
660 | i += *cp; | |
661 | return(i); | |
662 | } | |
663 | ||
664 | checkw(c, name) | |
665 | char *name; | |
666 | { | |
667 | if (wflag) { | |
668 | printf("%c ", c); | |
669 | if (vflag) | |
670 | longt(&stbuf); | |
671 | printf("%s: ", name); | |
672 | if (response() == 'y'){ | |
673 | return(1); | |
674 | } | |
675 | return(0); | |
676 | } | |
677 | return(1); | |
678 | } | |
679 | ||
680 | response() | |
681 | { | |
682 | char c; | |
683 | ||
684 | c = getchar(); | |
685 | if (c != '\n') | |
686 | while (getchar() != '\n'); | |
687 | else c = 'n'; | |
688 | return(c); | |
689 | } | |
690 | ||
691 | checkupdate(arg) | |
692 | char *arg; | |
693 | { | |
694 | char name[100]; | |
695 | long mtime; | |
696 | daddr_t seekp; | |
697 | daddr_t lookup(); | |
698 | ||
699 | rewind(tfile); | |
700 | for (;;) { | |
701 | if ((seekp = lookup(arg)) < 0) | |
702 | return(1); | |
703 | fseek(tfile, seekp, 0); | |
704 | fscanf(tfile, "%s %lo", name, &mtime); | |
705 | if (stbuf.st_mtime > mtime) | |
706 | return(1); | |
707 | else | |
708 | return(0); | |
709 | } | |
710 | } | |
711 | ||
712 | done(n) | |
713 | { | |
714 | unlink(tname); | |
715 | exit(n); | |
716 | } | |
717 | ||
718 | prefix(s1, s2) | |
719 | register char *s1, *s2; | |
720 | { | |
721 | while (*s1) | |
722 | if (*s1++ != *s2++) | |
723 | return(0); | |
724 | if (*s2) | |
725 | return(*s2 == '/'); | |
726 | return(1); | |
727 | } | |
728 | ||
729 | getwdir(s) | |
730 | char *s; | |
731 | { | |
732 | int i; | |
733 | int pipdes[2]; | |
734 | ||
735 | pipe(pipdes); | |
736 | if ((i = fork()) == 0) { | |
737 | close(1); | |
738 | dup(pipdes[1]); | |
739 | execl("/bin/pwd", "pwd", 0); | |
740 | execl("/usr/bin/pwd", "pwd", 0); | |
741 | fprintf(stderr, "pwd failed!\n"); | |
742 | printf("/\n"); | |
743 | exit(1); | |
744 | } | |
745 | while (wait((int *)NULL) != -1) | |
746 | ; | |
747 | read(pipdes[0], s, 50); | |
748 | while(*s != '\n') | |
749 | s++; | |
750 | *s = '\0'; | |
751 | close(pipdes[0]); | |
752 | close(pipdes[1]); | |
753 | } | |
754 | ||
755 | #define N 200 | |
756 | int njab; | |
757 | daddr_t | |
758 | lookup(s) | |
759 | char *s; | |
760 | { | |
761 | register i; | |
762 | daddr_t a; | |
763 | ||
764 | for(i=0; s[i]; i++) | |
765 | if(s[i] == ' ') | |
766 | break; | |
767 | a = bsrch(s, i, low, high); | |
768 | return(a); | |
769 | } | |
770 | ||
771 | daddr_t | |
772 | bsrch(s, n, l, h) | |
773 | daddr_t l, h; | |
774 | char *s; | |
775 | { | |
776 | register i, j; | |
777 | char b[N]; | |
778 | daddr_t m, m1; | |
779 | ||
780 | njab = 0; | |
781 | ||
782 | loop: | |
783 | if(l >= h) | |
784 | return(-1L); | |
785 | m = l + (h-l)/2 - N/2; | |
786 | if(m < l) | |
787 | m = l; | |
788 | fseek(tfile, m, 0); | |
789 | fread(b, 1, N, tfile); | |
790 | njab++; | |
791 | for(i=0; i<N; i++) { | |
792 | if(b[i] == '\n') | |
793 | break; | |
794 | m++; | |
795 | } | |
796 | if(m >= h) | |
797 | return(-1L); | |
798 | m1 = m; | |
799 | j = i; | |
800 | for(i++; i<N; i++) { | |
801 | m1++; | |
802 | if(b[i] == '\n') | |
803 | break; | |
804 | } | |
805 | i = cmp(b+j, s, n); | |
806 | if(i < 0) { | |
807 | h = m; | |
808 | goto loop; | |
809 | } | |
810 | if(i > 0) { | |
811 | l = m1; | |
812 | goto loop; | |
813 | } | |
814 | return(m); | |
815 | } | |
816 | ||
817 | cmp(b, s, n) | |
818 | char *b, *s; | |
819 | { | |
820 | register i; | |
821 | ||
822 | if(b[0] != '\n') | |
823 | exit(2); | |
824 | for(i=0; i<n; i++) { | |
825 | if(b[i+1] > s[i]) | |
826 | return(-1); | |
827 | if(b[i+1] < s[i]) | |
828 | return(1); | |
829 | } | |
830 | return(b[i+1] == ' '? 0 : -1); | |
831 | } | |
832 | ||
833 | readtape(buffer) | |
834 | char *buffer; | |
835 | { | |
836 | int i, j; | |
837 | ||
838 | if (recno >= nblock || first == 0) { | |
839 | if (first == 0 && nblock == 1) | |
840 | j = NBLOCK; | |
841 | else | |
842 | j = nblock; | |
843 | if ((i = read(mt, tbuf, TBLOCK*j)) < 0) { | |
844 | fprintf(stderr, "Tar: tape read error\n"); | |
845 | done(3); | |
846 | } | |
847 | if (first == 0) { | |
848 | if ((i % TBLOCK) != 0) { | |
849 | fprintf(stderr, "Tar: tape blocksize error\n"); | |
850 | done(3); | |
851 | } | |
852 | i /= TBLOCK; | |
853 | if (rflag && i != 1) { | |
854 | fprintf(stderr, "Tar: Cannot update blocked tapes (yet)\n"); | |
855 | done(4); | |
856 | } | |
857 | if (i != nblock && i != 1) { | |
858 | fprintf(stderr, "Tar: blocksize = %d\n", i); | |
859 | nblock = i; | |
860 | } | |
861 | } | |
862 | recno = 0; | |
863 | } | |
864 | first = 1; | |
865 | copy(buffer, &tbuf[recno++]); | |
866 | return(TBLOCK); | |
867 | } | |
868 | ||
869 | writetape(buffer) | |
870 | char *buffer; | |
871 | { | |
872 | first = 1; | |
873 | if (recno >= nblock) { | |
874 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { | |
875 | fprintf(stderr, "Tar: tape write error\n"); | |
876 | done(2); | |
877 | } | |
878 | recno = 0; | |
879 | } | |
880 | copy(&tbuf[recno++], buffer); | |
881 | if (recno >= nblock) { | |
882 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { | |
883 | fprintf(stderr, "Tar: tape write error\n"); | |
884 | done(2); | |
885 | } | |
886 | recno = 0; | |
887 | } | |
888 | return(TBLOCK); | |
889 | } | |
890 | ||
891 | backtape() | |
892 | { | |
893 | lseek(mt, (long) -TBLOCK, 1); | |
894 | if (recno >= nblock) { | |
895 | recno = nblock - 1; | |
896 | if (read(mt, tbuf, TBLOCK*nblock) < 0) { | |
897 | fprintf(stderr, "Tar: tape read error after seek\n"); | |
898 | done(4); | |
899 | } | |
900 | lseek(mt, (long) -TBLOCK, 1); | |
901 | } | |
902 | } | |
903 | ||
904 | flushtape() | |
905 | { | |
906 | write(mt, tbuf, TBLOCK*nblock); | |
907 | } | |
908 | ||
909 | copy(to, from) | |
910 | register char *to, *from; | |
911 | { | |
912 | register i; | |
913 | ||
914 | i = TBLOCK; | |
915 | do { | |
916 | *to++ = *from++; | |
917 | } while (--i); | |
918 | } |