Commit | Line | Data |
---|---|---|
8f731832 DH |
1 | /* cpio COMPILE: cc -O cpio.c -s -i -o cpio -lS |
2 | cpio -- copy file collections | |
3 | ||
4 | */ | |
5 | #include <stdio.h> | |
6 | #include <sys/types.h> | |
7 | #include <sys/stat.h> | |
8 | #include <signal.h> | |
9 | #define EQ(x,y) (strcmp(x,y)==0) | |
10 | /* for VAX, Interdata, ... */ | |
11 | #define MKSHORT(v,lv) {U.l=1L;if(U.c[0]) U.l=lv,v[0]=U.s[1],v[1]=U.s[0]; else U.l=lv,v[0]=U.s[0],v[1]=U.s[1];} | |
12 | #define MAGIC 070707 | |
13 | #define FILETYPE 060000 | |
14 | #define IN 1 | |
15 | #define OUT 2 | |
16 | #define PASS 3 | |
17 | #define HDRSIZE ((sizeof Hdr)-256) | |
18 | #define LINKS 1000 | |
19 | ||
20 | struct stat Statb, Xstatb; | |
21 | ||
22 | struct header { | |
23 | short h_magic, | |
24 | h_dev, | |
25 | h_ino, | |
26 | h_mode, | |
27 | h_uid, | |
28 | h_gid, | |
29 | h_nlink, | |
30 | h_rdev; | |
31 | short h_mtime[2]; | |
32 | short h_namesize; | |
33 | short h_filesize[2]; | |
34 | char h_name[256]; | |
35 | } Hdr; | |
36 | ||
37 | int Bufsize = 512; | |
38 | short Buf[256], *Dbuf; | |
39 | int Wct; | |
40 | short *Wp; | |
41 | ||
42 | short Option, | |
43 | Dir, | |
44 | Uncond, | |
45 | Link, | |
46 | Rename, | |
47 | Toc, | |
48 | Verbose, | |
49 | Select, | |
50 | Mod_time, | |
51 | Swap; | |
52 | ||
53 | int Ifile, | |
54 | Ofile, | |
55 | Input = 0, | |
56 | Output = 1; | |
57 | long Blocks; | |
58 | ||
59 | char Fullname[256], | |
60 | Name[256]; | |
61 | int Pathend; | |
62 | ||
63 | FILE *Rtty, | |
64 | *Wtty; | |
65 | ||
66 | char *Pattern; | |
67 | short Dev, | |
68 | Uid, | |
69 | Gid, | |
70 | A_directory, | |
71 | A_special; | |
72 | extern errno; | |
73 | char *malloc(); | |
74 | char *cd(); | |
75 | char *Cd_name; | |
76 | FILE *popen(); | |
77 | ||
78 | union { long l; short s[2]; char c[4]; } U; | |
79 | ||
80 | /* for VAX, Interdata, ... */ | |
81 | long mklong(v) | |
82 | short v[]; | |
83 | { | |
84 | U.l = 1; | |
85 | if(U.c[0]) | |
86 | U.s[0] = v[1], U.s[1] = v[0]; | |
87 | else | |
88 | U.s[0] = v[0], U.s[1] = v[1]; | |
89 | return U.l; | |
90 | } | |
91 | ||
92 | main(argc, argv) | |
93 | char **argv; | |
94 | { | |
95 | register ct; | |
96 | long filesz; | |
97 | register char *lastarg, *fullp; | |
98 | ||
99 | if(argc < 2 || argc > 4) { | |
100 | usage: | |
101 | err("Usage: cpio -o[vB] <name-list >collection\n%s\n%s\n", | |
102 | " cpio -i[drstuvB] [pattern] <collection", | |
103 | " cpio -p[dlruv] [pattern] directory <name-list"); | |
104 | exit(1); | |
105 | } | |
106 | signal(SIGSYS, 1); | |
107 | lastarg = argv[argc-1]; | |
108 | if(*argv[1] != '-') | |
109 | goto usage; | |
110 | Uid = getuid(); | |
111 | umask(0); | |
112 | Gid = getgid(); | |
113 | ||
114 | while(*++argv[1]) { | |
115 | switch(*argv[1]) { | |
116 | case 'B': | |
117 | Bufsize = 5120; | |
118 | break; | |
119 | case 'i': | |
120 | Option = IN; | |
121 | Pattern = argc == 2? "*": argv[2]; | |
122 | break; | |
123 | case 'o': | |
124 | Option = OUT; | |
125 | break; | |
126 | case 'p': | |
127 | if(access(lastarg, 2) == -1) { | |
128 | accerr: | |
129 | err("cannot write in <%s>\n", lastarg); | |
130 | exit(1); | |
131 | } | |
132 | strcpy(Fullname, lastarg); | |
133 | strcat(Fullname, "/"); | |
134 | stat(Fullname, &Xstatb); | |
135 | if((Xstatb.st_mode&S_IFMT) != S_IFDIR) | |
136 | goto accerr; | |
137 | Option = PASS; | |
138 | Dev = Xstatb.st_dev; | |
139 | Pattern = argc == 3? "*": argv[2]; | |
140 | break; | |
141 | case 'd': | |
142 | Dir++; | |
143 | break; | |
144 | case 'l': | |
145 | Link++; | |
146 | break; | |
147 | case 'm': | |
148 | Mod_time++; | |
149 | break; | |
150 | case 'r': | |
151 | Rename++; | |
152 | Rtty = fopen("/dev/tty", "r"); | |
153 | Wtty = fopen("/dev/tty", "w"); | |
154 | if(Rtty==NULL || Wtty==NULL) { | |
155 | err( | |
156 | "Cannot rename (/dev/tty missing)\n"); | |
157 | exit(1); | |
158 | } | |
159 | break; | |
160 | case 's': | |
161 | Swap++; | |
162 | break; | |
163 | case 't': | |
164 | Toc++; | |
165 | break; | |
166 | case 'u': | |
167 | Uncond++; | |
168 | break; | |
169 | case 'v': | |
170 | Verbose++; | |
171 | break; | |
172 | default: | |
173 | goto usage; | |
174 | } | |
175 | } | |
176 | if(!Option) { | |
177 | err("Options must include o|i|p\n"); | |
178 | exit(1); | |
179 | } | |
180 | ||
181 | if(Option != PASS) | |
182 | Wp = Dbuf = malloc(Bufsize); | |
183 | Wct = Bufsize >> 1; | |
184 | ||
185 | if(Option == PASS && Rename) { | |
186 | err("Pass and Rename cannot be used together"); | |
187 | exit(1); | |
188 | } | |
189 | switch(Option) { | |
190 | ||
191 | case OUT: | |
192 | while(getname()) { | |
193 | if(mklong(Hdr.h_filesize) == 0L) { | |
194 | bwrite(&Hdr, HDRSIZE+Hdr.h_namesize); | |
195 | continue; | |
196 | } | |
197 | if((Ifile = open(Hdr.h_name, 0)) < 0) { | |
198 | err("<%s> ?\n", Hdr.h_name); | |
199 | continue; | |
200 | } | |
201 | bwrite(&Hdr, HDRSIZE+Hdr.h_namesize); | |
202 | for(filesz=mklong(Hdr.h_filesize); filesz>0; filesz-= 512){ | |
203 | ct = filesz>512? 512: filesz; | |
204 | if(read(Ifile, Buf, ct) < 0) { | |
205 | err("Cannot read %s\n", Hdr.h_name); | |
206 | continue; | |
207 | } | |
208 | bwrite(Buf, ct); | |
209 | } | |
210 | close(Ifile); | |
211 | if(Verbose) | |
212 | err("%s\n", Hdr.h_name); | |
213 | } | |
214 | strcpy(Hdr.h_name, "TRAILER!!!"); | |
215 | MKSHORT(Hdr.h_filesize, 0L); | |
216 | Hdr.h_namesize = strlen("TRAILER!!!") + 1; | |
217 | bwrite(&Hdr, HDRSIZE+Hdr.h_namesize); | |
218 | bwrite(Dbuf, Bufsize); | |
219 | break; | |
220 | ||
221 | case IN: | |
222 | pwd(); | |
223 | while(gethdr()) { | |
224 | Ofile = ckname(Hdr.h_name)? openout(Hdr.h_name): 0; | |
225 | for(filesz=mklong(Hdr.h_filesize); filesz>0; filesz-= 512){ | |
226 | ct = filesz>512? 512: filesz; | |
227 | bread(Buf, ct); | |
228 | if(Ofile) { | |
229 | if(Swap) | |
230 | swap(Buf, ct); | |
231 | if(write(Ofile, Buf, ct) < 0) { | |
232 | err("Cannot write %s\n", Hdr.h_name); | |
233 | continue; | |
234 | } | |
235 | } | |
236 | } | |
237 | if(Ofile) { | |
238 | close(Ofile); | |
239 | set_time(Cd_name, mklong(Hdr.h_mtime), mklong(Hdr.h_mtime)); | |
240 | } | |
241 | if(!Select) | |
242 | continue; | |
243 | if(Verbose) | |
244 | if(Toc) | |
245 | pentry(Hdr.h_name); | |
246 | else | |
247 | puts(Hdr.h_name); | |
248 | else if(Toc) | |
249 | puts(Hdr.h_name); | |
250 | } | |
251 | break; | |
252 | ||
253 | case PASS: | |
254 | fullp = Fullname + strlen(Fullname); | |
255 | ||
256 | while(getname()) { | |
257 | if(!ckname(Hdr.h_name)) | |
258 | continue; | |
259 | strcpy(fullp, Hdr.h_name); | |
260 | ||
261 | if(Link | |
262 | && !A_directory | |
263 | && Dev == Statb.st_dev | |
264 | && (Uid == Statb.st_uid || !Uid)) { | |
265 | unlink(Fullname); | |
266 | if(link(Hdr.h_name, Fullname) < 0) { | |
267 | err( | |
268 | "Cannot link <%s> & <%s>\n", | |
269 | Hdr.h_name, Fullname); | |
270 | continue; | |
271 | } | |
272 | set_time(Hdr.h_name, mklong(Hdr.h_mtime), mklong(Hdr.h_mtime)); | |
273 | goto ckverbose; | |
274 | } | |
275 | if(!(Ofile = openout(Fullname))) | |
276 | continue; | |
277 | if((Ifile = open(Hdr.h_name, 0)) < 0) { | |
278 | err("<%s> ?\n", Hdr.h_name); | |
279 | close(Ofile); | |
280 | continue; | |
281 | } | |
282 | filesz = Statb.st_size; | |
283 | for(; filesz > 0; filesz -= 512) { | |
284 | ct = filesz>512? 512: filesz; | |
285 | if(read(Ifile, Buf, ct) < 0) { | |
286 | err("Cannot read %s\n", Hdr.h_name); | |
287 | break; | |
288 | } | |
289 | if(Ofile) | |
290 | if(write(Ofile, Buf, ct) < 0) { | |
291 | err("Cannot write %s\n", Hdr.h_name); | |
292 | break; | |
293 | } | |
294 | ++Blocks; | |
295 | } | |
296 | close(Ifile); | |
297 | if(Ofile) { | |
298 | close(Ofile); | |
299 | set_time(Fullname, Statb.st_atime, mklong(Hdr.h_mtime)); | |
300 | ckverbose: | |
301 | if(Verbose) | |
302 | puts(Fullname); | |
303 | } | |
304 | } | |
305 | } | |
306 | err("%D blocks\n", Blocks * (Bufsize>>9)); | |
307 | exit(0); | |
308 | } | |
309 | ||
310 | getname() | |
311 | { | |
312 | register char *namep = Name; | |
313 | static long tlong; | |
314 | ||
315 | for(;;) { | |
316 | if(gets(namep) == NULL) | |
317 | return 0; | |
318 | if(*namep == '.' && namep[1] == '/') | |
319 | namep += 2; | |
320 | strcpy(Hdr.h_name, namep); | |
321 | if(stat(namep, &Statb) < 0) { | |
322 | err("< %s > ?\n", Hdr.h_name); | |
323 | continue; | |
324 | } | |
325 | A_directory = (Statb.st_mode & FILETYPE) == S_IFDIR; | |
326 | A_special = ((Statb.st_mode & FILETYPE) == S_IFBLK) | |
327 | || ((Statb.st_mode & FILETYPE) == S_IFCHR); | |
328 | Hdr.h_magic = MAGIC; | |
329 | Hdr.h_namesize = strlen(Hdr.h_name) + 1; | |
330 | Hdr.h_uid = Statb.st_uid; | |
331 | Hdr.h_gid = Statb.st_gid; | |
332 | Hdr.h_dev = Statb.st_dev; | |
333 | Hdr.h_ino = Statb.st_ino; | |
334 | Hdr.h_mode = Statb.st_mode; | |
335 | MKSHORT(Hdr.h_mtime, Statb.st_mtime); | |
336 | Hdr.h_nlink = Statb.st_nlink; | |
337 | tlong = Hdr.h_mode & S_IFREG? Statb.st_size: 0L; | |
338 | MKSHORT(Hdr.h_filesize, tlong); | |
339 | Hdr.h_rdev = Statb.st_rdev; | |
340 | return 1; | |
341 | } | |
342 | } | |
343 | ||
344 | gethdr() | |
345 | { | |
346 | ||
347 | bread(&Hdr, HDRSIZE); | |
348 | ||
349 | if(Hdr.h_magic != MAGIC) { | |
350 | err("Out of phase--get help"); | |
351 | abort(); | |
352 | exit(1); | |
353 | } | |
354 | bread(Hdr.h_name, Hdr.h_namesize); | |
355 | if(Swap) { | |
356 | swap(Hdr.h_name, Hdr.h_namesize); | |
357 | } | |
358 | if(EQ(Hdr.h_name, "TRAILER!!!")) | |
359 | return 0; | |
360 | A_directory = (Hdr.h_mode & FILETYPE) == S_IFDIR; | |
361 | A_special =((Hdr.h_mode & FILETYPE) == S_IFBLK) | |
362 | || ((Hdr.h_mode & FILETYPE) == S_IFCHR); | |
363 | return 1; | |
364 | } | |
365 | ||
366 | ckname(namep) | |
367 | register char *namep; | |
368 | { | |
369 | ++Select; | |
370 | if(!gmatch(namep, Pattern)) { | |
371 | Select = 0; | |
372 | return 0; | |
373 | } | |
374 | if(Rename && !A_directory) { | |
375 | fprintf(Wtty, "Rename <%s>\n", namep); | |
376 | fflush(Wtty); | |
377 | fgets(namep, 128, Rtty); | |
378 | if(feof(Rtty)) | |
379 | exit(1); | |
380 | namep[strlen(namep) - 1] = '\0'; | |
381 | if(EQ(namep, "")) { | |
382 | printf("Skipped\n"); | |
383 | return 0; | |
384 | } | |
385 | } | |
386 | return !Toc; | |
387 | } | |
388 | ||
389 | openout(namep) | |
390 | register char *namep; | |
391 | { | |
392 | register f; | |
393 | register char *np; | |
394 | ||
395 | if(!strncmp(namep, "./", 2)) | |
396 | namep += 2; | |
397 | np = namep; | |
398 | if(Option == IN) | |
399 | Cd_name = namep = cd(namep); | |
400 | if(A_directory) { | |
401 | if(!Dir | |
402 | || Rename | |
403 | || EQ(namep, ".") | |
404 | || EQ(namep, "..") | |
405 | || stat(namep, &Xstatb) == 0) | |
406 | return 0; | |
407 | ||
408 | while(!makdir(namep)) | |
409 | missdir(namep); | |
410 | ret: | |
411 | chmod(namep, Hdr.h_mode); | |
412 | if(Uid == 0) | |
413 | chown(namep, Hdr.h_uid, Hdr.h_gid); | |
414 | set_time(namep, mklong(Hdr.h_mtime), mklong(Hdr.h_mtime)); | |
415 | return 0; | |
416 | } | |
417 | if(Hdr.h_nlink > 1) | |
418 | if(!postml(namep, np)) | |
419 | return 0; | |
420 | if(A_special) { | |
421 | s_again: | |
422 | if(mknod(namep, Hdr.h_mode, Hdr.h_rdev) < 0) { | |
423 | if(missdir(namep)) | |
424 | goto s_again; | |
425 | err("Cannot mknod <%s>\n", namep); | |
426 | return 0; | |
427 | } | |
428 | goto ret; | |
429 | } | |
430 | if(stat(namep, &Xstatb) == 0) | |
431 | if(!Uncond && (mklong(Hdr.h_mtime) < Xstatb.st_mtime)) { | |
432 | err("current <%s> newer\n", namep); | |
433 | return 0; | |
434 | } | |
435 | if(Option == PASS | |
436 | && Hdr.h_ino == Xstatb.st_ino | |
437 | && Hdr.h_dev == Xstatb.st_dev) { | |
438 | err("Attempt to pass file to self!\n"); | |
439 | exit(1); | |
440 | } | |
441 | c_again: | |
442 | if((f = creat(namep, Hdr.h_mode)) < 0) { | |
443 | if(missdir(namep)) | |
444 | goto c_again; | |
445 | err("Cannot create <%s> (errno:%d)\n", namep, errno); | |
446 | return 0; | |
447 | } | |
448 | if(Uid == 0) | |
449 | chown(namep, Hdr.h_uid, Hdr.h_gid); | |
450 | return f; | |
451 | } | |
452 | ||
453 | bread(b, c) | |
454 | register c; | |
455 | register short *b; | |
456 | { | |
457 | static nleft = 0; | |
458 | static short *ip; | |
459 | register short *p = ip; | |
460 | ||
461 | c = (c+1)>>1; | |
462 | while(c--) { | |
463 | if(!nleft) { | |
464 | again: | |
465 | if(read(Input, Dbuf, Bufsize)!=Bufsize) { | |
466 | Input = chgreel(0, Input); | |
467 | goto again; | |
468 | } | |
469 | nleft = Bufsize >> 1; | |
470 | p = Dbuf; | |
471 | ++Blocks; | |
472 | } | |
473 | *b++ = *p++; | |
474 | --nleft; | |
475 | } | |
476 | ip = p; | |
477 | } | |
478 | ||
479 | bwrite(rp, c) | |
480 | register short *rp; | |
481 | register c; | |
482 | { | |
483 | register short *wp = Wp; | |
484 | ||
485 | c = (c+1) >> 1; | |
486 | while(c--) { | |
487 | if(!Wct) { | |
488 | again: | |
489 | if(write(Output, Dbuf, Bufsize)<0) { | |
490 | Output = chgreel(1, Output); | |
491 | goto again; | |
492 | } | |
493 | Wct = Bufsize >> 1; | |
494 | wp = Dbuf; | |
495 | ++Blocks; | |
496 | } | |
497 | *wp++ = *rp++; | |
498 | --Wct; | |
499 | } | |
500 | Wp = wp; | |
501 | } | |
502 | ||
503 | postml(namep, np) | |
504 | register char *namep, *np; | |
505 | { | |
506 | register i; | |
507 | static struct ml { | |
508 | short m_dev, | |
509 | m_ino; | |
510 | char m_name[2]; | |
511 | } *ml[LINKS]; | |
512 | static mlinks = 0; | |
513 | char *mlp; | |
514 | ||
515 | for(i = 0; i < mlinks; ++i) { | |
516 | if(mlinks == LINKS) break; | |
517 | if(ml[i]->m_ino==Hdr.h_ino && | |
518 | ml[i]->m_dev==Hdr.h_dev) { | |
519 | if(Verbose) | |
520 | printf("%s linked to %s\n", ml[i]->m_name, | |
521 | np); | |
522 | unlink(namep); | |
523 | if(Option == IN) { | |
524 | Fullname[Pathend] = '\0'; | |
525 | strcat(Fullname, ml[i]->m_name); | |
526 | mlp = Fullname; | |
527 | } else | |
528 | mlp = ml[i]->m_name; | |
529 | l_again: | |
530 | if(link(mlp, namep) < 0) { | |
531 | if(missdir(np)) | |
532 | goto l_again; | |
533 | err("Cannot link <%s>&<%s>.\n", | |
534 | ml[i]->m_name, np); | |
535 | } | |
536 | set_time(namep, mklong(Hdr.h_mtime), mklong(Hdr.h_mtime)); | |
537 | return 0; | |
538 | } | |
539 | } | |
540 | if(mlinks == LINKS | |
541 | || (ml[mlinks] = malloc(strlen(np) + sizeof(struct ml))) == 0) { | |
542 | static int first=1; | |
543 | ||
544 | if(first) | |
545 | if(mlinks == LINKS) | |
546 | err("Too many links\n"); | |
547 | else | |
548 | err("No memory for links\n"); | |
549 | mlinks = LINKS; | |
550 | first = 0; | |
551 | return 1; | |
552 | } | |
553 | ml[mlinks]->m_dev = Hdr.h_dev; | |
554 | ml[mlinks]->m_ino = Hdr.h_ino; | |
555 | strcpy(ml[mlinks]->m_name, np); | |
556 | ++mlinks; | |
557 | return 1; | |
558 | } | |
559 | ||
560 | pentry(namep) | |
561 | register char *namep; | |
562 | { | |
563 | ||
564 | register i; | |
565 | static short lastid = -1; | |
566 | #include <pwd.h> | |
567 | static struct passwd *pw; | |
568 | struct passwd *getpwuid(); | |
569 | static char tbuf[32]; | |
570 | ||
571 | printf("%-7o", Hdr.h_mode & 0177777); | |
572 | if(lastid == Hdr.h_uid) | |
573 | printf("%-6s", pw->pw_name); | |
574 | else { | |
575 | setpwent(); | |
576 | if(pw = getpwuid(Hdr.h_uid)) { | |
577 | printf("%-6s", pw->pw_name); | |
578 | lastid = Hdr.h_uid; | |
579 | } else | |
580 | printf("%-6d", Hdr.h_uid); | |
581 | } | |
582 | printf("%7D ", mklong(Hdr.h_filesize)); | |
583 | U.l = mklong(Hdr.h_mtime); | |
584 | strcpy(tbuf, ctime(&U.l)); | |
585 | tbuf[24] = '\0'; | |
586 | printf(" %s %s\n", &tbuf[4], namep); | |
587 | } | |
588 | ||
589 | gmatch(s, p) | |
590 | register char *s, *p; | |
591 | { | |
592 | register int c; | |
593 | int cc, ok, lc, scc; | |
594 | ||
595 | if(EQ(p, "*")) | |
596 | return 1; | |
597 | scc = *s; | |
598 | lc = 077777; | |
599 | switch (c = *p) { | |
600 | ||
601 | case '[': | |
602 | ok = 0; | |
603 | while (cc = *++p) { | |
604 | switch (cc) { | |
605 | ||
606 | case ']': | |
607 | if (ok) | |
608 | return(gmatch(++s, ++p)); | |
609 | else | |
610 | return(0); | |
611 | ||
612 | case '-': | |
613 | ok |= (lc <= scc & scc <= (cc=p[1])); | |
614 | } | |
615 | if (scc==(lc=cc)) ok++; | |
616 | } | |
617 | return(0); | |
618 | ||
619 | case '?': | |
620 | caseq: | |
621 | if(scc) return(gmatch(++s, ++p)); | |
622 | return(0); | |
623 | case '*': | |
624 | return(umatch(s, ++p)); | |
625 | case 0: | |
626 | return(!scc); | |
627 | } | |
628 | if (c==scc) goto caseq; | |
629 | return(0); | |
630 | } | |
631 | ||
632 | umatch(s, p) | |
633 | register char *s, *p; | |
634 | { | |
635 | if(*p==0) return(1); | |
636 | while(*s) | |
637 | if (gmatch(s++,p)) return(1); | |
638 | return(0); | |
639 | } | |
640 | ||
641 | makdir(namep) | |
642 | register char *namep; | |
643 | { | |
644 | static status; | |
645 | ||
646 | if(fork()) | |
647 | wait(&status); | |
648 | else { | |
649 | close(2); | |
650 | execl("/bin/mkdir", "mkdir", namep, 0); | |
651 | exit(1); | |
652 | } | |
653 | return ((status>>8) & 0377)? 0: 1; | |
654 | } | |
655 | ||
656 | swap(buf, ct) | |
657 | register ct; | |
658 | register union swp { short shortw; char charv[2]; } *buf; | |
659 | { | |
660 | register char c; | |
661 | ||
662 | ct = (ct + 1) >> 1; | |
663 | ||
664 | while(ct--) { | |
665 | c = buf->charv[0]; | |
666 | buf->charv[0] = buf->charv[1]; | |
667 | buf->charv[1] = c; | |
668 | ++buf; | |
669 | } | |
670 | } | |
671 | set_time(namep, atime, mtime) | |
672 | register *namep; | |
673 | long atime, mtime; | |
674 | { | |
675 | static long timevec[2]; | |
676 | ||
677 | if(Uid || !Mod_time) | |
678 | return; | |
679 | timevec[0] = atime; | |
680 | timevec[1] = mtime; | |
681 | utime(namep, timevec); | |
682 | } | |
683 | chgreel(x, fl) | |
684 | { | |
685 | register f; | |
686 | char str[22]; | |
687 | FILE *devtty; | |
688 | struct stat statb; | |
689 | ||
690 | err("errno: %d, ", errno); | |
691 | err("Can't %s\n", x? "write output": "read input"); | |
692 | fstat(fl, &statb); | |
693 | if((statb.st_mode&S_IFMT) != S_IFCHR) | |
694 | exit(1); | |
695 | again: | |
696 | err("If you want to go on, type device/file name when ready\n"); | |
697 | devtty = fopen("/dev/tty", "r"); | |
698 | fgets(str, 20, devtty); | |
699 | str[strlen(str) - 1] = '\0'; | |
700 | if(!*str) | |
701 | exit(1); | |
702 | close(fl); | |
703 | if((f = open(str, x? 1: 0)) < 0) { | |
704 | err("That didn't work"); | |
705 | fclose(devtty); | |
706 | goto again; | |
707 | } | |
708 | return f; | |
709 | } | |
710 | missdir(namep) | |
711 | register char *namep; | |
712 | { | |
713 | register char *np; | |
714 | register ct = 0; | |
715 | ||
716 | if(!Dir) | |
717 | return 0; | |
718 | for(np = namep; *np; ++np) | |
719 | if(*np == '/') { | |
720 | *np = '\0'; | |
721 | if(stat(namep, &Xstatb) == -1) | |
722 | makdir(namep), ++ct; | |
723 | *np = '/'; | |
724 | } | |
725 | return ct; | |
726 | } | |
727 | err(a, b, c) | |
728 | { | |
729 | fprintf(stderr, a, b, c); | |
730 | } | |
731 | pwd() | |
732 | { | |
733 | FILE *dir; | |
734 | ||
735 | dir = popen("pwd", "r"); | |
736 | fgets(Fullname, 128, dir); | |
737 | pclose(dir); | |
738 | Pathend = strlen(Fullname); | |
739 | Fullname[Pathend - 1] = '/'; | |
740 | } | |
741 | char * cd(n) | |
742 | register char *n; | |
743 | { | |
744 | char *p_save = Name, *n_save = n, *p_end = 0; | |
745 | register char *p = Name; | |
746 | static char dotdot[]="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../"; | |
747 | int slashes; | |
748 | ||
749 | for(; *p && *n == *p; ++p, ++n) { /* whatever part of strings == */ | |
750 | if(*p == '/') | |
751 | p_save = p+1, n_save = n+1; | |
752 | } | |
753 | ||
754 | p = p_save; | |
755 | *p++ = '\0'; | |
756 | for(slashes = 0; *p; ++p) { /* if prev is longer, chdir("..") */ | |
757 | if(*p == '/') | |
758 | ++slashes; | |
759 | } | |
760 | p = p_save; | |
761 | if(slashes) { | |
762 | slashes = slashes * 3 - 1; | |
763 | dotdot[slashes] = '\0'; | |
764 | chdir(dotdot); | |
765 | dotdot[slashes] = '/'; | |
766 | } | |
767 | ||
768 | n = n_save; | |
769 | for(; *n; ++n, ++p) { | |
770 | *p = *n; | |
771 | if(*n == '/') | |
772 | p_end = p+1, n_save = n+1; | |
773 | } | |
774 | *p = '\0'; | |
775 | ||
776 | if(p_end) { | |
777 | *p_end = '\0'; | |
778 | if(chdir(p_save) == -1) { | |
779 | if(!missdir(p_save)) { | |
780 | cd_err: | |
781 | err("Cannot chdir\n"); | |
782 | abort(); | |
783 | } else if(chdir(p_save) == -1) | |
784 | goto cd_err; | |
785 | } | |
786 | } else | |
787 | *p_save = '\0'; | |
788 | return n_save; | |
789 | } |