| 1 | #include "tp.h" |
| 2 | |
| 3 | gettape(how) |
| 4 | int (*how)(); |
| 5 | { |
| 6 | register char *ptr0, *ptr1; |
| 7 | register struct dent *d; |
| 8 | int count; |
| 9 | |
| 10 | do { |
| 11 | d = &dir[0]; |
| 12 | count = 0; |
| 13 | do { |
| 14 | if (d->d_namep == 0) continue; |
| 15 | decode(name,d); |
| 16 | if (rnarg > 2) { |
| 17 | ptr0 = name; |
| 18 | ptr1 = *parg; |
| 19 | while (*ptr1) |
| 20 | if (*ptr0++ != *ptr1++) goto cont; |
| 21 | if (*ptr0 && *ptr0 != '/') goto cont; |
| 22 | } |
| 23 | (*how)(d); /* delete, extract, or taboc */ |
| 24 | ++count; |
| 25 | cont: continue; |
| 26 | } while (++d <= lastd); |
| 27 | if (count == 0 && rnarg > 2) |
| 28 | printf("%s not found\n", *parg); |
| 29 | ++parg; |
| 30 | } while (--narg > 2); |
| 31 | } |
| 32 | |
| 33 | delete(dd) |
| 34 | struct dent *dd; |
| 35 | { |
| 36 | if (verify('d') >= 0) |
| 37 | clrent(dd); |
| 38 | } |
| 39 | |
| 40 | |
| 41 | update() |
| 42 | { |
| 43 | register struct dent *d; |
| 44 | register b, last; |
| 45 | int first, size; |
| 46 | |
| 47 | |
| 48 | bitmap(); |
| 49 | d = &dir[0]; |
| 50 | do { |
| 51 | if(d->d_namep == 0 || (d->d_mode&OK) == 0) continue; |
| 52 | if (d->d_size == 0) continue; |
| 53 | /* find a place on the tape for this file */ |
| 54 | size = (d->d_size+BSIZE-1)/BSIZE; |
| 55 | first = ndentb; |
| 56 | toosmall: ++first; |
| 57 | if ((last = first + size) >= tapsiz) maperr(); |
| 58 | for (b = first; b < last; ++b) |
| 59 | if (map[(b>>3) & MAPMASK] & (1<<(b&7))) { |
| 60 | first = b; |
| 61 | goto toosmall; |
| 62 | }; |
| 63 | d->d_tapea = first; |
| 64 | setmap(d); |
| 65 | } while (++d <= lastd); |
| 66 | wrdir(); |
| 67 | update1(); |
| 68 | } |
| 69 | |
| 70 | |
| 71 | update1() |
| 72 | { |
| 73 | register struct dent *d, *id; |
| 74 | register index; |
| 75 | int f; |
| 76 | |
| 77 | for (;;) { |
| 78 | d = &dir[0]; |
| 79 | index = MTSIZ; |
| 80 | id = 0; |
| 81 | do { /* find new dent with lowest tape address */ |
| 82 | if(d->d_namep == 0 || (d->d_mode&OK) == 0) continue; |
| 83 | if (d->d_tapea < index) { |
| 84 | index = d->d_tapea; |
| 85 | id = d; |
| 86 | } |
| 87 | } while (++d <= lastd); |
| 88 | if ((d = id) == 0) return; |
| 89 | d->d_mode &= ~OK; /* change from new to old */ |
| 90 | if (d->d_size == 0) continue; |
| 91 | decode(name,d); |
| 92 | wseek(index); |
| 93 | if ((f = open(name,0)) < 0) { |
| 94 | printf("Can't open %s\n", name); |
| 95 | continue; |
| 96 | } |
| 97 | for (index = d->d_size/BSIZE; index != 0; --index) { |
| 98 | if (read(f,(char *)tapeb,BSIZE) != BSIZE) phserr(); |
| 99 | twrite(); |
| 100 | } |
| 101 | if (index = d->d_size % BSIZE) { |
| 102 | if (read(f,(char *)tapeb,index) != index) phserr(); |
| 103 | twrite(); |
| 104 | } |
| 105 | if (read(f,(char *)tapeb,1) != 0) phserr(); |
| 106 | close(f); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | phserr() |
| 111 | { printf("%s -- Phase error \n", name); } |
| 112 | |
| 113 | |
| 114 | bitmap() /* place old files in the map */ |
| 115 | { |
| 116 | register char *m; |
| 117 | register count; |
| 118 | register struct dent *d; |
| 119 | |
| 120 | for(m=map;m<&map[MAPSIZE];) *m++ = 0; |
| 121 | count = ndirent; |
| 122 | d = dir; |
| 123 | do { |
| 124 | if(d->d_namep != 0 && (d->d_mode&OK) == 0 |
| 125 | && d->d_size != 0) setmap(d); |
| 126 | d++; |
| 127 | } while (--count); |
| 128 | } |
| 129 | |
| 130 | setmap(d) |
| 131 | register struct dent *d; |
| 132 | { |
| 133 | unsigned c, block; |
| 134 | char bit; |
| 135 | int i; |
| 136 | |
| 137 | c = d->d_size/BSIZE; |
| 138 | if (d->d_size % BSIZE) c++; |
| 139 | block = d->d_tapea; |
| 140 | if ((c += block) >= tapsiz) maperr(); |
| 141 | do { |
| 142 | bit = 1 << (block & 7); |
| 143 | i = (block>>3) & MAPMASK; |
| 144 | if (bit & map[i]) maperr(); |
| 145 | map[i] |= bit; |
| 146 | } while (++block < c); |
| 147 | } |
| 148 | |
| 149 | maperr() |
| 150 | { |
| 151 | printf("Tape overflow\n"); |
| 152 | done(); |
| 153 | } |
| 154 | |
| 155 | |
| 156 | usage() |
| 157 | { |
| 158 | register reg,count; |
| 159 | int nused, nentr, nfree; |
| 160 | static lused; |
| 161 | |
| 162 | bitmap(); |
| 163 | for(count=0,nentr=0;count<ndirent;count++) |
| 164 | if(dir[count].d_namep != 0) nentr++; |
| 165 | nused = nfree = 0; |
| 166 | reg = ndentb; |
| 167 | ++reg; /* address of first non-directory tape block */ |
| 168 | count = tapsiz - reg; |
| 169 | do { |
| 170 | if (reg >= tapsiz) { |
| 171 | printf("Tape overflow\n"); |
| 172 | done(); |
| 173 | } |
| 174 | if (map[(reg>>3) & MAPMASK] & (1 << (reg&7))) { |
| 175 | nused++; |
| 176 | lused = reg; |
| 177 | } else { |
| 178 | if (flags & flm) break; |
| 179 | nfree++; |
| 180 | } |
| 181 | reg++; |
| 182 | } while (--count); |
| 183 | printf("%4d entries\n%4d used\n", nentr, nused); |
| 184 | if ((flags & flm)==0) |
| 185 | printf("%4d free\n", nfree); |
| 186 | printf("%4d last\n", lused); |
| 187 | } |
| 188 | |
| 189 | |
| 190 | taboc(dd) |
| 191 | struct dent *dd; |
| 192 | { |
| 193 | register mode; |
| 194 | register *m; |
| 195 | register char *s; |
| 196 | int count, *localtime(); |
| 197 | char work[20]; |
| 198 | |
| 199 | if (flags & flv) { |
| 200 | mode = dd->d_mode; |
| 201 | s = &work[19]; |
| 202 | *s = 0; |
| 203 | for (count = 3; count; --count) { |
| 204 | if (mode&1) *--s = 'x'; |
| 205 | else *--s = '-'; |
| 206 | if (mode&2) *--s = 'w'; |
| 207 | else *--s = '-'; |
| 208 | if (mode&4) *--s = 'r'; |
| 209 | else *--s = '-'; |
| 210 | mode >>= 3; |
| 211 | } |
| 212 | if (mode&4) s[2] = 's'; |
| 213 | if (mode&2) s[5] = 's'; |
| 214 | printf("%s%4d%4d%5d%9D ",s,dd->d_uid, dd->d_gid,dd->d_tapea,dd->d_size); |
| 215 | m = localtime(&dd->d_time); |
| 216 | printf("%2d/%2d/%2d %2d:%2d ",m[5],m[4]+1,m[3],m[2],m[1]); |
| 217 | } |
| 218 | printf("%s\n", name); |
| 219 | } |
| 220 | |
| 221 | |
| 222 | extract(d) |
| 223 | register struct dent *d; |
| 224 | { |
| 225 | register count, id; |
| 226 | |
| 227 | if (d->d_size==0) return; |
| 228 | if (verify('x') < 0) return; |
| 229 | rseek(d->d_tapea); |
| 230 | unlink(name); |
| 231 | if ((id = creat(name,d->d_mode)) < 0) |
| 232 | printf("%s -- create error\n", name); |
| 233 | count = d->d_size/BSIZE; |
| 234 | while (count--) { |
| 235 | tread(); |
| 236 | if (write(id, (char *)tapeb, BSIZE) != BSIZE) goto ng; |
| 237 | } |
| 238 | if (count = d->d_size % BSIZE) { |
| 239 | tread(); |
| 240 | if (write(id, (char *)tapeb, count) != count) { |
| 241 | ng: printf("%s -- write error\n", name); |
| 242 | close(id); |
| 243 | return; |
| 244 | } |
| 245 | } |
| 246 | close(id); |
| 247 | chown(name,d->d_uid & 0377, d->d_gid&0377); |
| 248 | } |