| 1 | #include "tp.h" |
| 2 | #include <stdio.h> |
| 3 | #include <sys/types.h> |
| 4 | #include <sys/stat.h> |
| 5 | #include <sys/dir.h> |
| 6 | |
| 7 | struct direct direct; |
| 8 | struct stat statb; |
| 9 | |
| 10 | clrdir() |
| 11 | { |
| 12 | register j, *p; |
| 13 | |
| 14 | j = ndirent * (DIRSZ/sizeof(int)); |
| 15 | p = (int *)dir; |
| 16 | do (*p++ = 0); while (--j); |
| 17 | lastd = 0; |
| 18 | } |
| 19 | |
| 20 | clrent(ptr) |
| 21 | struct dent *ptr; |
| 22 | { |
| 23 | register *p, j; |
| 24 | |
| 25 | p = (int *)ptr; |
| 26 | j = DIRSZ/sizeof(int); |
| 27 | do *p++ = 0; |
| 28 | while (--j); |
| 29 | if (++ptr == lastd) do { |
| 30 | if (--lastd < dir) { |
| 31 | lastd = 0; |
| 32 | return; |
| 33 | } |
| 34 | } while (lastd->d_namep == 0); |
| 35 | } |
| 36 | |
| 37 | |
| 38 | rddir() |
| 39 | { |
| 40 | register struct tent *tp; |
| 41 | register struct dent *p1; |
| 42 | struct dent *dptr; |
| 43 | struct tent *tptr; |
| 44 | int count, i, sum; |
| 45 | short reg, *sp; |
| 46 | |
| 47 | sum = 0; |
| 48 | clrdir(); |
| 49 | rseek(0); |
| 50 | tread(); /* Read the bootstrap block */ |
| 51 | if ((tpentry[TPB-1].cksum != 0) && (flags & flm)) { |
| 52 | ndirent = tpentry[TPB-1].cksum; |
| 53 | if(flags & fls) swab((char *)&ndirent, (char *)&ndirent, sizeof(ndirent)); |
| 54 | if(ndirent < 0 || ndirent > MDIRENT) ndirent = MDIRENT; |
| 55 | ndentb = ndirent/TPB; |
| 56 | } |
| 57 | dptr = &dir[0]; |
| 58 | count = ndirent; |
| 59 | do { |
| 60 | if ((count % TPB) == 0) { /* next block */ |
| 61 | tread(); |
| 62 | tptr = &tpentry[0]; |
| 63 | } |
| 64 | if(flags & fls) |
| 65 | swab((char *)tptr, (char *)tptr, sizeof(*tptr)); |
| 66 | sp = (short *)tptr; |
| 67 | reg = 0; |
| 68 | for(i=0;i<sizeof(struct tent)/sizeof(short);i++) |
| 69 | reg += *sp++; |
| 70 | if(flags & fls) { |
| 71 | swab((char *)tptr, (char *)tptr, sizeof(*tptr)); |
| 72 | swabdir(tptr); |
| 73 | } |
| 74 | sum |= reg; |
| 75 | p1 = dptr; |
| 76 | if (reg == 0) { |
| 77 | tp = tptr; |
| 78 | if(tp->pathnam[0] != '\0') { |
| 79 | lastd = p1; |
| 80 | encode(tp->pathnam,p1); |
| 81 | p1->d_mode = tp->mode; |
| 82 | p1->d_uid = tp->uid; |
| 83 | p1->d_gid = tp->gid; |
| 84 | p1->d_size = (((long)tp->size0&0377L)<<16)+(tp->size1&0177777L); |
| 85 | p1->d_time = tp->time; |
| 86 | p1->d_tapea = tp->tapea; |
| 87 | } |
| 88 | } |
| 89 | ++tptr; /* bump to next tent */ |
| 90 | (dptr++)->d_mode &= ~OK; |
| 91 | } while (--count); |
| 92 | if(sum != 0) |
| 93 | if(flags & (fls|fli)) { |
| 94 | printf("Directory checksum\n"); |
| 95 | if ((flags & fli) == 0) done(); |
| 96 | } else { |
| 97 | flags |= fls; |
| 98 | rddir(); |
| 99 | printf("Warning: swabbing required\n"); |
| 100 | return; |
| 101 | } |
| 102 | bitmap(); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | wrdir() |
| 107 | { |
| 108 | register struct tent *tp; |
| 109 | register struct dent *dp; |
| 110 | struct dent *dptr; |
| 111 | int count, i; |
| 112 | short reg, *sp; |
| 113 | |
| 114 | wseek(0); |
| 115 | if (flags & flm) |
| 116 | reg = open(mheader,0); |
| 117 | else reg = open(theader,0); |
| 118 | if (reg >= 0) { |
| 119 | read(reg,(char *)tapeb,BSIZE); |
| 120 | close(reg); |
| 121 | if(flags & fls) |
| 122 | swab((char *)&ndirent, (char *)&tpentry[TPB-1].cksum, sizeof(ndirent)); |
| 123 | else |
| 124 | tpentry[TPB-1].cksum = ndirent; |
| 125 | } else |
| 126 | printf("\7\7\7Warning: cannot read prototype boot block.\n"); |
| 127 | dptr = &dir[0]; |
| 128 | count = ndirent; |
| 129 | for (;;) { |
| 130 | twrite(); |
| 131 | if (count == 0) return; |
| 132 | tp = &tpentry[0]; |
| 133 | do { |
| 134 | dp = dptr++; /* dptr set to next entry */ |
| 135 | if (dp->d_namep) { |
| 136 | decode(tp->pathnam,dp); |
| 137 | tp->mode = dp->d_mode; |
| 138 | tp->uid = dp->d_uid; |
| 139 | tp->gid = dp->d_gid; |
| 140 | tp->time = dp->d_time; |
| 141 | tp->size0 = dp->d_size >> 16; |
| 142 | tp->size1 = dp->d_size; |
| 143 | tp->tapea = dp->d_tapea; |
| 144 | if(flags & fls) { |
| 145 | swabdir(tp); |
| 146 | swab((char *)tp, (char *)tp, sizeof(*tp)); |
| 147 | } |
| 148 | reg = 0; |
| 149 | sp = (short *)tp; |
| 150 | for(i=0;i<sizeof(struct tent)/sizeof(short)-1;i++) |
| 151 | reg -= *sp++; |
| 152 | *sp = reg; |
| 153 | if(flags & fls) |
| 154 | swab((char *)tp, (char *)tp, sizeof(*tp)); |
| 155 | } else { |
| 156 | sp = (short *)tp; |
| 157 | for(i=0;i<sizeof(struct tent)/sizeof(short);i++) |
| 158 | *sp++ = 0; |
| 159 | } |
| 160 | tp++; |
| 161 | } while (--count % TPB); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | tread() |
| 166 | { |
| 167 | register j, *ptr; |
| 168 | |
| 169 | if (read(fio,(char *)tapeb,BSIZE) != BSIZE) { |
| 170 | printf("Tape read error\n"); |
| 171 | if ((flags & fli) == 0) done(); |
| 172 | ptr = (int *)tapeb; |
| 173 | j = BSIZE/sizeof(int); |
| 174 | while(j--) *ptr++ = 0; |
| 175 | } |
| 176 | rseeka++; |
| 177 | } |
| 178 | |
| 179 | twrite() |
| 180 | { |
| 181 | if (write(fio, (char *)tapeb,BSIZE) != BSIZE) { |
| 182 | printf("Tape write error\n"); |
| 183 | done(); |
| 184 | } |
| 185 | ++wseeka; |
| 186 | } |
| 187 | |
| 188 | rseek(blk) |
| 189 | { |
| 190 | rseeka = blk; |
| 191 | if (lseek(fio,(long)blk*BSIZE,0) < 0) seekerr(); |
| 192 | } |
| 193 | |
| 194 | wseek(blk) |
| 195 | { |
| 196 | register amt, b; |
| 197 | |
| 198 | amt = b = blk; |
| 199 | if ((amt -= wseeka) < 0) amt = -amt; |
| 200 | if (amt > 25 && b) { |
| 201 | lseek(fio, (long)(b-1)*BSIZE, 0); /* seek previous block */ |
| 202 | read(fio, (char *)&wseeka, 1); /* read next block */ |
| 203 | } |
| 204 | wseeka = b; |
| 205 | if (lseek(fio, (long)b*BSIZE, 0) < 0) seekerr(); |
| 206 | } |
| 207 | |
| 208 | seekerr() |
| 209 | { |
| 210 | printf("Tape seek error\n"); |
| 211 | done(); |
| 212 | } |
| 213 | |
| 214 | verify(key) |
| 215 | { |
| 216 | register c; |
| 217 | |
| 218 | if ((flags & (flw | flv)) == 0) |
| 219 | return(0); |
| 220 | repeat: printf("%c %s ", key, name); |
| 221 | if ((flags & flw) == 0) { |
| 222 | printf("\n"); |
| 223 | return(0); |
| 224 | } |
| 225 | c = getchar(); |
| 226 | if (c == 'n' && getchar() == '\n') |
| 227 | done(); |
| 228 | if (c == '\n') |
| 229 | return(-1); |
| 230 | if (c == 'y' && getchar() == '\n') |
| 231 | return(0); |
| 232 | while (getchar() != '\n'); |
| 233 | goto repeat; |
| 234 | } |
| 235 | |
| 236 | getfiles() |
| 237 | { |
| 238 | |
| 239 | if ((narg -= 2) == 0) { |
| 240 | strcpy(name, "."); |
| 241 | callout(); |
| 242 | } else while (--narg >= 0) { |
| 243 | strcpy(name, *parg++); |
| 244 | callout(); |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | |
| 249 | expand() |
| 250 | { |
| 251 | register char *p0, *save0; |
| 252 | int n, fid; |
| 253 | |
| 254 | if ((fid = open(name,0)) < 0) fserr(); |
| 255 | for (;;) { |
| 256 | if ((n = read(fid, (char *)&direct, sizeof(direct))) != sizeof(direct)) { |
| 257 | if (n == 0) { |
| 258 | close(fid); |
| 259 | return; |
| 260 | } |
| 261 | fserr(); |
| 262 | } |
| 263 | if (direct.d_ino == 0) /* null entry */ |
| 264 | continue; |
| 265 | p0 = name; |
| 266 | if (direct.d_name[0] == '.') /* don't save .xxxx */ |
| 267 | continue; |
| 268 | while (*p0++); |
| 269 | save0 = --p0; /* save loc of \0 */ |
| 270 | if (p0[-1] != '/') |
| 271 | *p0++ = '/'; |
| 272 | strcpy(p0, direct.d_name); |
| 273 | callout(); |
| 274 | *save0 = 0; /* restore */ |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | fserr() |
| 279 | { |
| 280 | printf("%s -- Cannot open file\n", name); |
| 281 | done(); |
| 282 | } |
| 283 | |
| 284 | callout() |
| 285 | { |
| 286 | register struct dent *d; |
| 287 | register char *ptr1, *ptr0; |
| 288 | struct dent *empty; |
| 289 | int mode; |
| 290 | |
| 291 | if (stat(name,&statb) < 0) fserr(); |
| 292 | mode = statb.st_mode; |
| 293 | if ((mode &= S_IFMT) != 0) { |
| 294 | if (mode == S_IFDIR) /* directory */ |
| 295 | expand(); |
| 296 | if(mode != S_IFREG) return; |
| 297 | } |
| 298 | /* when we reach here we have recursed until we found |
| 299 | * an ordinary file. Now we look for it in "dir". |
| 300 | */ |
| 301 | empty = 0; |
| 302 | d = &dir[0]; |
| 303 | do { |
| 304 | if (d->d_namep == 0) { /* empty directory slot */ |
| 305 | if (empty == 0) /* remember the first one */ |
| 306 | empty = d; |
| 307 | continue; |
| 308 | } |
| 309 | decode(name1,d); |
| 310 | ptr0 = name; |
| 311 | ptr1 = name1; |
| 312 | do if (*ptr0++ != *ptr1) goto cont; |
| 313 | while (*ptr1++); |
| 314 | /* veritably the same name */ |
| 315 | if (flags & flu) { /* check the times */ |
| 316 | if (d->d_time >= statb.st_mtime) |
| 317 | return; |
| 318 | } |
| 319 | if (verify('r') < 0) return; |
| 320 | goto copydir; |
| 321 | cont: continue; |
| 322 | } while (++d <= lastd); |
| 323 | /* name not found in directory */ |
| 324 | if ((d = empty) == 0) { |
| 325 | d = lastd +1; |
| 326 | if (d >= edir) { |
| 327 | printf("Directory overflow\n"); |
| 328 | done(); |
| 329 | } |
| 330 | } |
| 331 | if (verify('a') < 0) return; |
| 332 | if (d > lastd) lastd = d; |
| 333 | encode(name,d); |
| 334 | copydir: |
| 335 | d->d_mode = statb.st_mode | OK; |
| 336 | d->d_uid = statb.st_uid; |
| 337 | d->d_gid = statb.st_gid; |
| 338 | d->d_size = statb.st_size; |
| 339 | d->d_time = statb.st_mtime; |
| 340 | } |
| 341 | |
| 342 | swabdir(tp) |
| 343 | register struct tent *tp; |
| 344 | { |
| 345 | swab((char *)tp, (char *)tp, sizeof(*tp)); |
| 346 | swab(tp->pathnam, tp->pathnam, NAMELEN); |
| 347 | swab((char *)&tp->uid, (char *)&tp->uid, 4); /* uid,gid,spare,size0 */ |
| 348 | } |