Commit | Line | Data |
---|---|---|
8678ae71 | 1 | static char *sccsid = "@(#)tar.c 4.11 (Berkeley) 82/10/20"; |
555a248b BJ |
2 | |
3 | /* | |
4 | * Tape Archival Program | |
5 | */ | |
415c8aef | 6 | #include <stdio.h> |
d7ab2ea5 | 7 | #include <sys/param.h> |
415c8aef | 8 | #include <sys/stat.h> |
f4d092e2 | 9 | #include <dir.h> |
dfdd2236 | 10 | #include <sys/ioctl.h> |
06eff236 | 11 | #include <sys/mtio.h> |
415c8aef BJ |
12 | #include <signal.h> |
13 | ||
415c8aef | 14 | #define TBLOCK 512 |
9547dafa | 15 | #define NBLOCK 20 |
415c8aef | 16 | #define NAMSIZ 100 |
555a248b | 17 | |
415c8aef BJ |
18 | union hblock { |
19 | char dummy[TBLOCK]; | |
20 | struct header { | |
21 | char name[NAMSIZ]; | |
22 | char mode[8]; | |
23 | char uid[8]; | |
24 | char gid[8]; | |
25 | char size[12]; | |
26 | char mtime[12]; | |
27 | char chksum[8]; | |
28 | char linkflag; | |
29 | char linkname[NAMSIZ]; | |
30 | } dbuf; | |
555a248b | 31 | }; |
415c8aef BJ |
32 | |
33 | struct linkbuf { | |
34 | ino_t inum; | |
35 | dev_t devnum; | |
36 | int count; | |
37 | char pathname[NAMSIZ]; | |
38 | struct linkbuf *nextp; | |
555a248b BJ |
39 | }; |
40 | ||
41 | union hblock dblock; | |
42 | union hblock tbuf[NBLOCK]; | |
43 | struct linkbuf *ihead; | |
44 | struct stat stbuf; | |
45 | ||
46 | int rflag; | |
47 | int xflag; | |
48 | int vflag; | |
49 | int tflag; | |
50 | int cflag; | |
51 | int mflag; | |
52 | int fflag; | |
53 | int oflag; | |
54 | int pflag; | |
55 | int wflag; | |
56 | int hflag; | |
8678ae71 | 57 | int Bflag; |
555a248b BJ |
58 | |
59 | int mt; | |
60 | int term; | |
61 | int chksum; | |
62 | int recno; | |
63 | int first; | |
64 | int linkerrok; | |
415c8aef | 65 | int freemem = 1; |
06eff236 | 66 | int nblock = NBLOCK; |
555a248b BJ |
67 | int onintr(); |
68 | int onquit(); | |
69 | int onhup(); | |
70 | int onterm(); | |
415c8aef BJ |
71 | |
72 | daddr_t low; | |
73 | daddr_t high; | |
555a248b | 74 | daddr_t bsrch(); |
415c8aef BJ |
75 | |
76 | FILE *tfile; | |
77 | char tname[] = "/tmp/tarXXXXXX"; | |
415c8aef | 78 | char *usefile; |
555a248b | 79 | char magtape[] = "/dev/rmt8"; |
415c8aef | 80 | char *malloc(); |
555a248b BJ |
81 | char *sprintf(); |
82 | char *strcat(); | |
415c8aef BJ |
83 | |
84 | main(argc, argv) | |
85 | int argc; | |
86 | char *argv[]; | |
87 | { | |
88 | char *cp; | |
415c8aef BJ |
89 | |
90 | if (argc < 2) | |
91 | usage(); | |
92 | ||
93 | tfile = NULL; | |
94 | usefile = magtape; | |
95 | argv[argc] = 0; | |
96 | argv++; | |
97 | for (cp = *argv++; *cp; cp++) | |
98 | switch(*cp) { | |
555a248b | 99 | |
415c8aef BJ |
100 | case 'f': |
101 | usefile = *argv++; | |
102 | fflag++; | |
415c8aef | 103 | break; |
555a248b | 104 | |
415c8aef BJ |
105 | case 'c': |
106 | cflag++; | |
107 | rflag++; | |
108 | break; | |
555a248b | 109 | |
415c8aef BJ |
110 | case 'o': |
111 | oflag++; | |
112 | break; | |
555a248b | 113 | |
415c8aef BJ |
114 | case 'p': |
115 | pflag++; | |
116 | break; | |
555a248b | 117 | |
415c8aef BJ |
118 | case 'u': |
119 | mktemp(tname); | |
120 | if ((tfile = fopen(tname, "w")) == NULL) { | |
555a248b BJ |
121 | fprintf(stderr, |
122 | "Tar: cannot create temporary file (%s)\n", | |
123 | tname); | |
415c8aef BJ |
124 | done(1); |
125 | } | |
126 | fprintf(tfile, "!!!!!/!/!/!/!/!/!/! 000\n"); | |
555a248b BJ |
127 | /*FALL THRU*/ |
128 | ||
415c8aef BJ |
129 | case 'r': |
130 | rflag++; | |
415c8aef | 131 | break; |
555a248b | 132 | |
415c8aef BJ |
133 | case 'v': |
134 | vflag++; | |
135 | break; | |
555a248b | 136 | |
415c8aef BJ |
137 | case 'w': |
138 | wflag++; | |
139 | break; | |
555a248b | 140 | |
415c8aef BJ |
141 | case 'x': |
142 | xflag++; | |
143 | break; | |
555a248b | 144 | |
415c8aef BJ |
145 | case 't': |
146 | tflag++; | |
147 | break; | |
555a248b | 148 | |
415c8aef BJ |
149 | case 'm': |
150 | mflag++; | |
151 | break; | |
555a248b | 152 | |
415c8aef BJ |
153 | case '-': |
154 | break; | |
555a248b | 155 | |
415c8aef BJ |
156 | case '0': |
157 | case '1': | |
158 | case '4': | |
159 | case '5': | |
160 | case '7': | |
161 | case '8': | |
162 | magtape[8] = *cp; | |
163 | usefile = magtape; | |
164 | break; | |
555a248b | 165 | |
415c8aef BJ |
166 | case 'b': |
167 | nblock = atoi(*argv++); | |
168 | if (nblock > NBLOCK || nblock <= 0) { | |
555a248b BJ |
169 | fprintf(stderr, "Invalid blocksize. (Max %d)\n", |
170 | NBLOCK); | |
415c8aef BJ |
171 | done(1); |
172 | } | |
415c8aef | 173 | break; |
555a248b | 174 | |
415c8aef BJ |
175 | case 'l': |
176 | linkerrok++; | |
177 | break; | |
555a248b BJ |
178 | |
179 | case 'h': | |
180 | hflag++; | |
181 | break; | |
182 | ||
8678ae71 KM |
183 | case 'B': |
184 | Bflag++; | |
185 | break; | |
186 | ||
415c8aef BJ |
187 | default: |
188 | fprintf(stderr, "tar: %c: unknown option\n", *cp); | |
189 | usage(); | |
190 | } | |
191 | ||
555a248b BJ |
192 | if (!rflag && !xflag && !tflag) |
193 | usage(); | |
415c8aef | 194 | if (rflag) { |
555a248b | 195 | if (cflag && tfile != NULL) |
415c8aef | 196 | usage(); |
415c8aef BJ |
197 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
198 | signal(SIGINT, onintr); | |
199 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) | |
200 | signal(SIGHUP, onhup); | |
201 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) | |
202 | signal(SIGQUIT, onquit); | |
555a248b | 203 | #ifdef notdef |
415c8aef BJ |
204 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) |
205 | signal(SIGTERM, onterm); | |
555a248b | 206 | #endif |
415c8aef BJ |
207 | if (strcmp(usefile, "-") == 0) { |
208 | if (cflag == 0) { | |
555a248b BJ |
209 | fprintf(stderr, |
210 | "Can only create standard output archives\n"); | |
415c8aef BJ |
211 | done(1); |
212 | } | |
213 | mt = dup(1); | |
214 | nblock = 1; | |
555a248b | 215 | } else if ((mt = open(usefile, 2)) < 0) { |
415c8aef | 216 | if (cflag == 0 || (mt = creat(usefile, 0666)) < 0) { |
555a248b BJ |
217 | fprintf(stderr, |
218 | "tar: cannot open %s\n", usefile); | |
415c8aef BJ |
219 | done(1); |
220 | } | |
221 | } | |
415c8aef | 222 | dorep(argv); |
555a248b | 223 | done(0); |
415c8aef | 224 | } |
555a248b BJ |
225 | if (strcmp(usefile, "-") == 0) { |
226 | mt = dup(0); | |
227 | nblock = 1; | |
228 | } else if ((mt = open(usefile, 0)) < 0) { | |
229 | fprintf(stderr, "tar: cannot open %s\n", usefile); | |
230 | done(1); | |
415c8aef | 231 | } |
555a248b BJ |
232 | if (xflag) |
233 | doxtract(argv); | |
415c8aef | 234 | else |
555a248b | 235 | dotable(); |
415c8aef BJ |
236 | done(0); |
237 | } | |
238 | ||
239 | usage() | |
240 | { | |
555a248b | 241 | fprintf(stderr, |
8678ae71 | 242 | "tar: usage tar -{txruB}[cvfblmh] [tapefile] [blocksize] file1 file2...\n"); |
415c8aef BJ |
243 | done(1); |
244 | } | |
245 | ||
246 | dorep(argv) | |
555a248b | 247 | char *argv[]; |
415c8aef BJ |
248 | { |
249 | register char *cp, *cp2; | |
250 | char wdir[60]; | |
251 | ||
252 | if (!cflag) { | |
253 | getdir(); | |
254 | do { | |
255 | passtape(); | |
256 | if (term) | |
257 | done(0); | |
258 | getdir(); | |
259 | } while (!endtape()); | |
260 | if (tfile != NULL) { | |
261 | char buf[200]; | |
262 | ||
555a248b BJ |
263 | sprintf(buf, |
264 | "sort +0 -1 +1nr %s -o %s; awk '$1 != prev {print; prev=$1}' %s >%sX; mv %sX %s", | |
415c8aef BJ |
265 | tname, tname, tname, tname, tname, tname); |
266 | fflush(tfile); | |
267 | system(buf); | |
268 | freopen(tname, "r", tfile); | |
269 | fstat(fileno(tfile), &stbuf); | |
270 | high = stbuf.st_size; | |
271 | } | |
272 | } | |
273 | ||
274 | getwdir(wdir); | |
275 | while (*argv && ! term) { | |
276 | cp2 = *argv; | |
277 | if (!strcmp(cp2, "-C") && argv[1]) { | |
278 | argv++; | |
279 | if (chdir(*argv) < 0) | |
280 | perror(*argv); | |
281 | else | |
282 | getwdir(wdir); | |
283 | argv++; | |
284 | continue; | |
285 | } | |
286 | for (cp = *argv; *cp; cp++) | |
287 | if (*cp == '/') | |
288 | cp2 = cp; | |
289 | if (cp2 != *argv) { | |
290 | *cp2 = '\0'; | |
291 | chdir(*argv); | |
292 | *cp2 = '/'; | |
293 | cp2++; | |
294 | } | |
295 | putfile(*argv++, cp2); | |
296 | chdir(wdir); | |
297 | } | |
298 | putempty(); | |
299 | putempty(); | |
300 | flushtape(); | |
555a248b BJ |
301 | if (linkerrok == 0) |
302 | return; | |
303 | for (; ihead != NULL; ihead = ihead->nextp) { | |
304 | if (ihead->count == 0) | |
305 | continue; | |
306 | fprintf(stderr, "Missing links to %s\n", ihead->pathname); | |
307 | } | |
415c8aef BJ |
308 | } |
309 | ||
310 | endtape() | |
311 | { | |
555a248b BJ |
312 | if (dblock.dbuf.name[0] != '\0') |
313 | return (0); | |
314 | backtape(); | |
315 | return (1); | |
415c8aef BJ |
316 | } |
317 | ||
318 | getdir() | |
319 | { | |
320 | register struct stat *sp; | |
321 | int i; | |
322 | ||
555a248b | 323 | readtape((char *)&dblock); |
415c8aef BJ |
324 | if (dblock.dbuf.name[0] == '\0') |
325 | return; | |
326 | sp = &stbuf; | |
327 | sscanf(dblock.dbuf.mode, "%o", &i); | |
328 | sp->st_mode = i; | |
329 | sscanf(dblock.dbuf.uid, "%o", &i); | |
330 | sp->st_uid = i; | |
331 | sscanf(dblock.dbuf.gid, "%o", &i); | |
332 | sp->st_gid = i; | |
333 | sscanf(dblock.dbuf.size, "%lo", &sp->st_size); | |
334 | sscanf(dblock.dbuf.mtime, "%lo", &sp->st_mtime); | |
335 | sscanf(dblock.dbuf.chksum, "%o", &chksum); | |
336 | if (chksum != checksum()) { | |
337 | fprintf(stderr, "directory checksum error\n"); | |
338 | done(2); | |
339 | } | |
340 | if (tfile != NULL) | |
341 | fprintf(tfile, "%s %s\n", dblock.dbuf.name, dblock.dbuf.mtime); | |
342 | } | |
343 | ||
344 | passtape() | |
345 | { | |
346 | long blocks; | |
347 | char buf[TBLOCK]; | |
348 | ||
349 | if (dblock.dbuf.linkflag == '1') | |
350 | return; | |
351 | blocks = stbuf.st_size; | |
352 | blocks += TBLOCK-1; | |
353 | blocks /= TBLOCK; | |
354 | ||
355 | while (blocks-- > 0) | |
356 | readtape(buf); | |
357 | } | |
358 | ||
359 | putfile(longname, shortname) | |
555a248b BJ |
360 | char *longname; |
361 | char *shortname; | |
415c8aef BJ |
362 | { |
363 | int infile; | |
364 | long blocks; | |
365 | char buf[TBLOCK]; | |
366 | register char *cp, *cp2; | |
aeb5c9b4 KM |
367 | struct direct *dp; |
368 | DIR *dirp; | |
415c8aef BJ |
369 | int i, j; |
370 | ||
371 | infile = open(shortname, 0); | |
372 | if (infile < 0) { | |
373 | fprintf(stderr, "tar: %s: cannot open file\n", longname); | |
374 | return; | |
375 | } | |
dfdd2236 | 376 | lstat(shortname, &stbuf); |
415c8aef BJ |
377 | if (tfile != NULL && checkupdate(longname) == 0) { |
378 | close(infile); | |
379 | return; | |
380 | } | |
381 | if (checkw('r', longname) == 0) { | |
382 | close(infile); | |
383 | return; | |
384 | } | |
385 | ||
386 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { | |
555a248b BJ |
387 | for (i = 0, cp = buf; *cp++ = longname[i++];) |
388 | ; | |
415c8aef BJ |
389 | *--cp = '/'; |
390 | *++cp = 0 ; | |
415c8aef | 391 | if (!oflag) { |
555a248b BJ |
392 | if ((cp - buf) >= NAMSIZ) { |
393 | fprintf(stderr, "%s: file name too long\n", | |
394 | longname); | |
395 | close(infile); | |
396 | return; | |
397 | } | |
398 | stbuf.st_size = 0; | |
399 | tomodes(&stbuf); | |
400 | strcpy(dblock.dbuf.name,buf); | |
401 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); | |
402 | writetape((char *)&dblock); | |
415c8aef BJ |
403 | } |
404 | chdir(shortname); | |
aeb5c9b4 KM |
405 | close(infile); |
406 | if ((dirp = opendir(".")) == NULL) { | |
407 | fprintf(stderr, "%s: directory read error\n", longname); | |
408 | return; | |
409 | } | |
410 | while ((dp = readdir(dirp)) != NULL && !term) { | |
411 | if (dp->d_ino == 0) | |
415c8aef | 412 | continue; |
555a248b BJ |
413 | if (!strcmp(".", dp->d_name) || |
414 | !strcmp("..", dp->d_name)) | |
415c8aef | 415 | continue; |
aeb5c9b4 KM |
416 | strcpy(cp, dp->d_name); |
417 | i = telldir(dirp); | |
418 | closedir(dirp); | |
415c8aef | 419 | putfile(buf, cp); |
aeb5c9b4 KM |
420 | dirp = opendir("."); |
421 | seekdir(dirp, i); | |
415c8aef | 422 | } |
aeb5c9b4 | 423 | closedir(dirp); |
415c8aef BJ |
424 | chdir(".."); |
425 | return; | |
426 | } | |
555a248b BJ |
427 | i = stbuf.st_mode & S_IFMT; |
428 | if (i != S_IFREG && i != S_IFLNK) { | |
429 | fprintf(stderr, "tar: %s is not a file. Not dumped\n", | |
430 | longname); | |
415c8aef BJ |
431 | return; |
432 | } | |
415c8aef | 433 | tomodes(&stbuf); |
555a248b BJ |
434 | cp2 = longname; cp = dblock.dbuf.name; i = 0; |
435 | while ((*cp++ = *cp2++) && i < NAMSIZ) | |
436 | i++; | |
415c8aef BJ |
437 | if (i >= NAMSIZ) { |
438 | fprintf(stderr, "%s: file name too long\n", longname); | |
439 | close(infile); | |
440 | return; | |
441 | } | |
555a248b BJ |
442 | if ((stbuf.st_mode & S_IFMT) == S_IFLNK) { |
443 | if (stbuf.st_size + 1 >= NAMSIZ) { | |
444 | fprintf(stderr, "%s: symbolic link too long\n", | |
445 | longname); | |
446 | close(infile); | |
447 | return; | |
448 | } | |
449 | i = readlink(longname, dblock.dbuf.linkname, NAMSIZ - 1); | |
450 | if (i < 0) { | |
451 | perror("readlink"); | |
452 | close(infile); | |
453 | return; | |
454 | } | |
455 | dblock.dbuf.linkname[i] = '\0'; | |
456 | dblock.dbuf.linkflag = '2'; | |
457 | if (vflag) { | |
458 | fprintf(stderr, "a %s ", longname); | |
459 | fprintf(stderr, "symbolic link to %s\n", | |
460 | dblock.dbuf.linkname); | |
461 | } | |
462 | sprintf(dblock.dbuf.size, "%11lo", 0); | |
463 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); | |
464 | writetape((char *)&dblock); | |
465 | close(infile); | |
466 | return; | |
467 | } | |
415c8aef BJ |
468 | if (stbuf.st_nlink > 1) { |
469 | struct linkbuf *lp; | |
470 | int found = 0; | |
471 | ||
555a248b BJ |
472 | for (lp = ihead; lp != NULL; lp = lp->nextp) |
473 | if (lp->inum == stbuf.st_ino && | |
474 | lp->devnum == stbuf.st_dev) { | |
415c8aef BJ |
475 | found++; |
476 | break; | |
477 | } | |
415c8aef BJ |
478 | if (found) { |
479 | strcpy(dblock.dbuf.linkname, lp->pathname); | |
480 | dblock.dbuf.linkflag = '1'; | |
481 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); | |
482 | writetape( (char *) &dblock); | |
483 | if (vflag) { | |
484 | fprintf(stderr, "a %s ", longname); | |
485 | fprintf(stderr, "link to %s\n", lp->pathname); | |
486 | } | |
487 | lp->count--; | |
488 | close(infile); | |
489 | return; | |
490 | } | |
555a248b BJ |
491 | lp = (struct linkbuf *) malloc(sizeof(*lp)); |
492 | if (lp == NULL) { | |
493 | if (freemem) { | |
494 | fprintf(stderr, | |
495 | "Out of memory. Link information lost\n"); | |
496 | freemem = 0; | |
415c8aef | 497 | } |
555a248b BJ |
498 | } else { |
499 | lp->nextp = ihead; | |
500 | ihead = lp; | |
501 | lp->inum = stbuf.st_ino; | |
502 | lp->devnum = stbuf.st_dev; | |
503 | lp->count = stbuf.st_nlink - 1; | |
504 | strcpy(lp->pathname, longname); | |
415c8aef BJ |
505 | } |
506 | } | |
415c8aef BJ |
507 | blocks = (stbuf.st_size + (TBLOCK-1)) / TBLOCK; |
508 | if (vflag) { | |
509 | fprintf(stderr, "a %s ", longname); | |
510 | fprintf(stderr, "%ld blocks\n", blocks); | |
511 | } | |
512 | sprintf(dblock.dbuf.chksum, "%6o", checksum()); | |
555a248b | 513 | writetape((char *)&dblock); |
415c8aef BJ |
514 | |
515 | while ((i = read(infile, buf, TBLOCK)) > 0 && blocks > 0) { | |
516 | writetape(buf); | |
517 | blocks--; | |
518 | } | |
519 | close(infile); | |
520 | if (blocks != 0 || i != 0) | |
521 | fprintf(stderr, "%s: file changed size\n", longname); | |
555a248b | 522 | while (--blocks >= 0) |
415c8aef BJ |
523 | putempty(); |
524 | } | |
525 | ||
415c8aef | 526 | doxtract(argv) |
555a248b | 527 | char *argv[]; |
415c8aef BJ |
528 | { |
529 | long blocks, bytes; | |
530 | char buf[TBLOCK]; | |
531 | char **cp; | |
532 | int ofile; | |
533 | ||
534 | for (;;) { | |
535 | getdir(); | |
536 | if (endtape()) | |
537 | break; | |
415c8aef BJ |
538 | if (*argv == 0) |
539 | goto gotit; | |
415c8aef BJ |
540 | for (cp = argv; *cp; cp++) |
541 | if (prefix(*cp, dblock.dbuf.name)) | |
542 | goto gotit; | |
543 | passtape(); | |
544 | continue; | |
545 | ||
546 | gotit: | |
547 | if (checkw('x', dblock.dbuf.name) == 0) { | |
548 | passtape(); | |
549 | continue; | |
550 | } | |
555a248b | 551 | if (checkdir(dblock.dbuf.name)) |
415c8aef | 552 | continue; |
555a248b BJ |
553 | if (dblock.dbuf.linkflag == '2') { |
554 | unlink(dblock.dbuf.name); | |
555 | if (symlink(dblock.dbuf.linkname, dblock.dbuf.name)<0) { | |
556 | fprintf(stderr, "%s: symbolic link failed\n", | |
557 | dblock.dbuf.name); | |
558 | continue; | |
559 | } | |
560 | if (vflag) | |
561 | fprintf(stderr, "x %s symbolic link to %s\n", | |
562 | dblock.dbuf.name, dblock.dbuf.linkname); | |
dfdd2236 KM |
563 | #ifdef notdef |
564 | /* ignore alien orders */ | |
555a248b BJ |
565 | chown(dblock.dbuf.name, stbuf.st_uid, stbuf.st_gid); |
566 | if (mflag == 0) { | |
567 | time_t timep[2]; | |
568 | ||
569 | timep[0] = time(0); | |
570 | timep[1] = stbuf.st_mtime; | |
571 | utime(dblock.dbuf.name, timep); | |
572 | } | |
573 | if (pflag) | |
574 | chmod(dblock.dbuf.name, stbuf.st_mode & 07777); | |
dfdd2236 | 575 | #endif |
555a248b BJ |
576 | continue; |
577 | } | |
415c8aef BJ |
578 | if (dblock.dbuf.linkflag == '1') { |
579 | unlink(dblock.dbuf.name); | |
580 | if (link(dblock.dbuf.linkname, dblock.dbuf.name) < 0) { | |
555a248b BJ |
581 | fprintf(stderr, "%s: cannot link\n", |
582 | dblock.dbuf.name); | |
415c8aef BJ |
583 | continue; |
584 | } | |
585 | if (vflag) | |
06eff236 BJ |
586 | fprintf(stderr, "%s linked to %s\n", |
587 | dblock.dbuf.name, dblock.dbuf.linkname); | |
415c8aef BJ |
588 | continue; |
589 | } | |
555a248b BJ |
590 | if ((ofile = creat(dblock.dbuf.name,stbuf.st_mode&0xfff)) < 0) { |
591 | fprintf(stderr, "tar: %s - cannot create\n", | |
592 | dblock.dbuf.name); | |
415c8aef BJ |
593 | passtape(); |
594 | continue; | |
595 | } | |
cd2661db | 596 | chown(dblock.dbuf.name, stbuf.st_uid, stbuf.st_gid); |
415c8aef BJ |
597 | blocks = ((bytes = stbuf.st_size) + TBLOCK-1)/TBLOCK; |
598 | if (vflag) | |
06eff236 BJ |
599 | fprintf(stderr, "x %s, %ld bytes, %ld tape blocks\n", |
600 | dblock.dbuf.name, bytes, blocks); | |
555a248b | 601 | for (; blocks-- > 0; bytes -= TBLOCK) { |
415c8aef BJ |
602 | readtape(buf); |
603 | if (bytes > TBLOCK) { | |
604 | if (write(ofile, buf, TBLOCK) < 0) { | |
555a248b BJ |
605 | fprintf(stderr, |
606 | "tar: %s: HELP - extract write error\n", | |
607 | dblock.dbuf.name); | |
415c8aef BJ |
608 | done(2); |
609 | } | |
555a248b BJ |
610 | continue; |
611 | } | |
612 | if (write(ofile, buf, (int) bytes) < 0) { | |
613 | fprintf(stderr, | |
614 | "tar: %s: HELP - extract write error\n", | |
615 | dblock.dbuf.name); | |
616 | done(2); | |
617 | } | |
415c8aef BJ |
618 | } |
619 | close(ofile); | |
620 | if (mflag == 0) { | |
621 | time_t timep[2]; | |
622 | ||
623 | timep[0] = time(NULL); | |
624 | timep[1] = stbuf.st_mtime; | |
625 | utime(dblock.dbuf.name, timep); | |
626 | } | |
cd2661db | 627 | if (pflag) |
555a248b | 628 | chmod(dblock.dbuf.name, stbuf.st_mode & 07777); |
415c8aef BJ |
629 | } |
630 | } | |
631 | ||
632 | dotable() | |
633 | { | |
634 | for (;;) { | |
635 | getdir(); | |
636 | if (endtape()) | |
637 | break; | |
638 | if (vflag) | |
639 | longt(&stbuf); | |
640 | printf("%s", dblock.dbuf.name); | |
641 | if (dblock.dbuf.linkflag == '1') | |
642 | printf(" linked to %s", dblock.dbuf.linkname); | |
555a248b BJ |
643 | if (dblock.dbuf.linkflag == '2') |
644 | printf(" symbolic link to %s", dblock.dbuf.linkname); | |
415c8aef BJ |
645 | printf("\n"); |
646 | passtape(); | |
647 | } | |
648 | } | |
649 | ||
650 | putempty() | |
651 | { | |
652 | char buf[TBLOCK]; | |
653 | char *cp; | |
654 | ||
655 | for (cp = buf; cp < &buf[TBLOCK]; ) | |
656 | *cp++ = '\0'; | |
657 | writetape(buf); | |
658 | } | |
659 | ||
660 | longt(st) | |
555a248b | 661 | register struct stat *st; |
415c8aef BJ |
662 | { |
663 | register char *cp; | |
664 | char *ctime(); | |
665 | ||
666 | pmode(st); | |
667 | printf("%3d/%1d", st->st_uid, st->st_gid); | |
668 | printf("%7D", st->st_size); | |
669 | cp = ctime(&st->st_mtime); | |
670 | printf(" %-12.12s %-4.4s ", cp+4, cp+20); | |
671 | } | |
672 | ||
673 | #define SUID 04000 | |
674 | #define SGID 02000 | |
675 | #define ROWN 0400 | |
676 | #define WOWN 0200 | |
677 | #define XOWN 0100 | |
678 | #define RGRP 040 | |
679 | #define WGRP 020 | |
680 | #define XGRP 010 | |
681 | #define ROTH 04 | |
682 | #define WOTH 02 | |
683 | #define XOTH 01 | |
684 | #define STXT 01000 | |
685 | int m1[] = { 1, ROWN, 'r', '-' }; | |
686 | int m2[] = { 1, WOWN, 'w', '-' }; | |
687 | int m3[] = { 2, SUID, 's', XOWN, 'x', '-' }; | |
688 | int m4[] = { 1, RGRP, 'r', '-' }; | |
689 | int m5[] = { 1, WGRP, 'w', '-' }; | |
690 | int m6[] = { 2, SGID, 's', XGRP, 'x', '-' }; | |
691 | int m7[] = { 1, ROTH, 'r', '-' }; | |
692 | int m8[] = { 1, WOTH, 'w', '-' }; | |
693 | int m9[] = { 2, STXT, 't', XOTH, 'x', '-' }; | |
694 | ||
695 | int *m[] = { m1, m2, m3, m4, m5, m6, m7, m8, m9}; | |
696 | ||
697 | pmode(st) | |
555a248b | 698 | register struct stat *st; |
415c8aef BJ |
699 | { |
700 | register int **mp; | |
701 | ||
702 | for (mp = &m[0]; mp < &m[9];) | |
703 | select(*mp++, st); | |
704 | } | |
705 | ||
706 | select(pairp, st) | |
555a248b BJ |
707 | int *pairp; |
708 | struct stat *st; | |
415c8aef BJ |
709 | { |
710 | register int n, *ap; | |
711 | ||
712 | ap = pairp; | |
713 | n = *ap++; | |
714 | while (--n>=0 && (st->st_mode&*ap++)==0) | |
715 | ap++; | |
716 | printf("%c", *ap); | |
717 | } | |
718 | ||
719 | checkdir(name) | |
555a248b | 720 | register char *name; |
415c8aef BJ |
721 | { |
722 | register char *cp; | |
555a248b | 723 | |
415c8aef | 724 | for (cp = name; *cp; cp++) { |
555a248b BJ |
725 | if (*cp != '/') |
726 | continue; | |
727 | *cp = '\0'; | |
728 | if (access(name, 1) < 0) { | |
729 | register int pid, rp; | |
730 | int i; | |
731 | ||
732 | if ((pid = fork()) == 0) { | |
733 | execl("/bin/mkdir", "mkdir", name, 0); | |
734 | execl("/usr/bin/mkdir", "mkdir", name, 0); | |
735 | fprintf(stderr, "tar: cannot find mkdir!\n"); | |
736 | done(0); | |
415c8aef | 737 | } |
555a248b BJ |
738 | while ((rp = wait(&i)) >= 0 && rp != pid) |
739 | ; | |
740 | chown(name, stbuf.st_uid, stbuf.st_gid); | |
741 | if (pflag) | |
742 | chmod(dblock.dbuf.name, stbuf.st_mode & 0777); | |
415c8aef | 743 | } |
555a248b | 744 | *cp = '/'; |
415c8aef | 745 | } |
555a248b | 746 | return (cp[-1]=='/'); |
415c8aef BJ |
747 | } |
748 | ||
749 | onintr() | |
750 | { | |
751 | signal(SIGINT, SIG_IGN); | |
752 | term++; | |
753 | } | |
754 | ||
755 | onquit() | |
756 | { | |
757 | signal(SIGQUIT, SIG_IGN); | |
758 | term++; | |
759 | } | |
760 | ||
761 | onhup() | |
762 | { | |
763 | signal(SIGHUP, SIG_IGN); | |
764 | term++; | |
765 | } | |
766 | ||
767 | onterm() | |
768 | { | |
769 | signal(SIGTERM, SIG_IGN); | |
770 | term++; | |
771 | } | |
772 | ||
773 | tomodes(sp) | |
774 | register struct stat *sp; | |
775 | { | |
776 | register char *cp; | |
777 | ||
778 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) | |
779 | *cp = '\0'; | |
780 | sprintf(dblock.dbuf.mode, "%6o ", sp->st_mode & 07777); | |
781 | sprintf(dblock.dbuf.uid, "%6o ", sp->st_uid); | |
782 | sprintf(dblock.dbuf.gid, "%6o ", sp->st_gid); | |
783 | sprintf(dblock.dbuf.size, "%11lo ", sp->st_size); | |
784 | sprintf(dblock.dbuf.mtime, "%11lo ", sp->st_mtime); | |
785 | } | |
786 | ||
787 | checksum() | |
788 | { | |
789 | register i; | |
790 | register char *cp; | |
791 | ||
555a248b BJ |
792 | for (cp = dblock.dbuf.chksum; |
793 | cp < &dblock.dbuf.chksum[sizeof(dblock.dbuf.chksum)]; cp++) | |
415c8aef BJ |
794 | *cp = ' '; |
795 | i = 0; | |
796 | for (cp = dblock.dummy; cp < &dblock.dummy[TBLOCK]; cp++) | |
797 | i += *cp; | |
555a248b | 798 | return (i); |
415c8aef BJ |
799 | } |
800 | ||
801 | checkw(c, name) | |
555a248b | 802 | char *name; |
415c8aef | 803 | { |
555a248b BJ |
804 | if (!wflag) |
805 | return (1); | |
806 | printf("%c ", c); | |
807 | if (vflag) | |
808 | longt(&stbuf); | |
809 | printf("%s: ", name); | |
810 | return (response() == 'y'); | |
415c8aef BJ |
811 | } |
812 | ||
813 | response() | |
814 | { | |
815 | char c; | |
816 | ||
817 | c = getchar(); | |
818 | if (c != '\n') | |
555a248b BJ |
819 | while (getchar() != '\n') |
820 | ; | |
821 | else | |
822 | c = 'n'; | |
823 | return (c); | |
415c8aef BJ |
824 | } |
825 | ||
826 | checkupdate(arg) | |
555a248b | 827 | char *arg; |
415c8aef BJ |
828 | { |
829 | char name[100]; | |
555a248b | 830 | long mtime; |
415c8aef BJ |
831 | daddr_t seekp; |
832 | daddr_t lookup(); | |
833 | ||
834 | rewind(tfile); | |
835 | for (;;) { | |
836 | if ((seekp = lookup(arg)) < 0) | |
555a248b | 837 | return (1); |
415c8aef BJ |
838 | fseek(tfile, seekp, 0); |
839 | fscanf(tfile, "%s %lo", name, &mtime); | |
555a248b | 840 | return (stbuf.st_mtime > mtime); |
415c8aef BJ |
841 | } |
842 | } | |
843 | ||
844 | done(n) | |
845 | { | |
846 | unlink(tname); | |
847 | exit(n); | |
848 | } | |
849 | ||
850 | prefix(s1, s2) | |
555a248b | 851 | register char *s1, *s2; |
415c8aef BJ |
852 | { |
853 | while (*s1) | |
854 | if (*s1++ != *s2++) | |
555a248b | 855 | return (0); |
415c8aef | 856 | if (*s2) |
555a248b BJ |
857 | return (*s2 == '/'); |
858 | return (1); | |
415c8aef BJ |
859 | } |
860 | ||
861 | getwdir(s) | |
555a248b | 862 | char *s; |
415c8aef | 863 | { |
555a248b | 864 | int i, pipdes[2]; |
415c8aef BJ |
865 | |
866 | pipe(pipdes); | |
867 | if ((i = fork()) == 0) { | |
868 | close(1); | |
869 | dup(pipdes[1]); | |
870 | execl("/bin/pwd", "pwd", 0); | |
871 | execl("/usr/bin/pwd", "pwd", 0); | |
872 | fprintf(stderr, "pwd failed!\n"); | |
873 | printf("/\n"); | |
874 | exit(1); | |
875 | } | |
876 | while (wait((int *)NULL) != -1) | |
877 | ; | |
878 | read(pipdes[0], s, 50); | |
555a248b | 879 | while (*s != '\n') |
415c8aef BJ |
880 | s++; |
881 | *s = '\0'; | |
882 | close(pipdes[0]); | |
883 | close(pipdes[1]); | |
884 | } | |
885 | ||
886 | #define N 200 | |
887 | int njab; | |
555a248b | 888 | |
415c8aef BJ |
889 | daddr_t |
890 | lookup(s) | |
555a248b | 891 | char *s; |
415c8aef BJ |
892 | { |
893 | register i; | |
894 | daddr_t a; | |
895 | ||
896 | for(i=0; s[i]; i++) | |
555a248b | 897 | if (s[i] == ' ') |
415c8aef BJ |
898 | break; |
899 | a = bsrch(s, i, low, high); | |
555a248b | 900 | return (a); |
415c8aef BJ |
901 | } |
902 | ||
903 | daddr_t | |
904 | bsrch(s, n, l, h) | |
555a248b BJ |
905 | daddr_t l, h; |
906 | char *s; | |
415c8aef BJ |
907 | { |
908 | register i, j; | |
909 | char b[N]; | |
910 | daddr_t m, m1; | |
911 | ||
912 | njab = 0; | |
913 | ||
914 | loop: | |
555a248b BJ |
915 | if (l >= h) |
916 | return (-1L); | |
415c8aef | 917 | m = l + (h-l)/2 - N/2; |
555a248b | 918 | if (m < l) |
415c8aef BJ |
919 | m = l; |
920 | fseek(tfile, m, 0); | |
921 | fread(b, 1, N, tfile); | |
922 | njab++; | |
923 | for(i=0; i<N; i++) { | |
555a248b | 924 | if (b[i] == '\n') |
415c8aef BJ |
925 | break; |
926 | m++; | |
927 | } | |
555a248b BJ |
928 | if (m >= h) |
929 | return (-1L); | |
415c8aef BJ |
930 | m1 = m; |
931 | j = i; | |
932 | for(i++; i<N; i++) { | |
933 | m1++; | |
555a248b | 934 | if (b[i] == '\n') |
415c8aef BJ |
935 | break; |
936 | } | |
937 | i = cmp(b+j, s, n); | |
555a248b | 938 | if (i < 0) { |
415c8aef BJ |
939 | h = m; |
940 | goto loop; | |
941 | } | |
555a248b | 942 | if (i > 0) { |
415c8aef BJ |
943 | l = m1; |
944 | goto loop; | |
945 | } | |
555a248b | 946 | return (m); |
415c8aef BJ |
947 | } |
948 | ||
949 | cmp(b, s, n) | |
555a248b | 950 | char *b, *s; |
415c8aef BJ |
951 | { |
952 | register i; | |
953 | ||
555a248b | 954 | if (b[0] != '\n') |
415c8aef BJ |
955 | exit(2); |
956 | for(i=0; i<n; i++) { | |
555a248b BJ |
957 | if (b[i+1] > s[i]) |
958 | return (-1); | |
959 | if (b[i+1] < s[i]) | |
960 | return (1); | |
415c8aef | 961 | } |
555a248b | 962 | return (b[i+1] == ' '? 0 : -1); |
415c8aef BJ |
963 | } |
964 | ||
965 | readtape(buffer) | |
555a248b | 966 | char *buffer; |
415c8aef | 967 | { |
06eff236 | 968 | register int i; |
415c8aef BJ |
969 | |
970 | if (recno >= nblock || first == 0) { | |
8678ae71 | 971 | if ((i = bread(mt, tbuf, TBLOCK*nblock)) < 0) { |
415c8aef BJ |
972 | fprintf(stderr, "Tar: tape read error\n"); |
973 | done(3); | |
974 | } | |
975 | if (first == 0) { | |
976 | if ((i % TBLOCK) != 0) { | |
977 | fprintf(stderr, "Tar: tape blocksize error\n"); | |
978 | done(3); | |
979 | } | |
980 | i /= TBLOCK; | |
06eff236 | 981 | if (i != nblock) { |
415c8aef BJ |
982 | fprintf(stderr, "Tar: blocksize = %d\n", i); |
983 | nblock = i; | |
984 | } | |
985 | } | |
986 | recno = 0; | |
987 | } | |
988 | first = 1; | |
989 | copy(buffer, &tbuf[recno++]); | |
555a248b | 990 | return (TBLOCK); |
415c8aef BJ |
991 | } |
992 | ||
993 | writetape(buffer) | |
555a248b | 994 | char *buffer; |
415c8aef BJ |
995 | { |
996 | first = 1; | |
415c8aef BJ |
997 | if (recno >= nblock) { |
998 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { | |
999 | fprintf(stderr, "Tar: tape write error\n"); | |
1000 | done(2); | |
1001 | } | |
1002 | recno = 0; | |
1003 | } | |
1004 | copy(&tbuf[recno++], buffer); | |
1005 | if (recno >= nblock) { | |
1006 | if (write(mt, tbuf, TBLOCK*nblock) < 0) { | |
1007 | fprintf(stderr, "Tar: tape write error\n"); | |
1008 | done(2); | |
1009 | } | |
1010 | recno = 0; | |
1011 | } | |
555a248b | 1012 | return (TBLOCK); |
415c8aef BJ |
1013 | } |
1014 | ||
1015 | backtape() | |
1016 | { | |
06eff236 BJ |
1017 | static int mtdev = 1; |
1018 | static struct mtop mtop = {MTBSR, 1}; | |
1019 | struct mtget mtget; | |
1020 | ||
1021 | if (mtdev == 1) | |
1022 | mtdev = ioctl(mt, MTIOCGET, &mtget); | |
1023 | if (mtdev == 0) { | |
1024 | if (ioctl(mt, MTIOCTOP, &mtop) < 0) { | |
1025 | fprintf(stderr, "Tar: tape backspace error\n"); | |
415c8aef BJ |
1026 | done(4); |
1027 | } | |
06eff236 BJ |
1028 | } else |
1029 | lseek(mt, (long) -TBLOCK*nblock, 1); | |
1030 | recno--; | |
415c8aef BJ |
1031 | } |
1032 | ||
1033 | flushtape() | |
1034 | { | |
1035 | write(mt, tbuf, TBLOCK*nblock); | |
1036 | } | |
1037 | ||
1038 | copy(to, from) | |
555a248b | 1039 | register char *to, *from; |
415c8aef BJ |
1040 | { |
1041 | register i; | |
1042 | ||
1043 | i = TBLOCK; | |
1044 | do { | |
1045 | *to++ = *from++; | |
1046 | } while (--i); | |
1047 | } | |
8678ae71 KM |
1048 | |
1049 | bread(fd, buf, size) | |
1050 | int fd; | |
1051 | char *buf; | |
1052 | int size; | |
1053 | { | |
1054 | int count; | |
1055 | static int lastread = 0; | |
1056 | ||
1057 | if (!Bflag) | |
1058 | return (read(fd, buf, size)); | |
1059 | for (count = 0; count < size; count += lastread) { | |
1060 | if (lastread < 0) { | |
1061 | if (count > 0) | |
1062 | return (count); | |
1063 | return (lastread); | |
1064 | } | |
1065 | lastread = read(fd, buf, size - count); | |
1066 | buf += lastread; | |
1067 | } | |
1068 | return (count); | |
1069 | } |