| 1 | #ifndef lint |
| 2 | static char sccsid[] = "@(#)tp3.c 4.1 %G%"; |
| 3 | #endif |
| 4 | |
| 5 | #include "tp.h" |
| 6 | |
| 7 | gettape(how) |
| 8 | int (*how)(); |
| 9 | { |
| 10 | register char *ptr0, *ptr1; |
| 11 | register struct dent *d; |
| 12 | int count; |
| 13 | |
| 14 | do { |
| 15 | d = &dir[0]; |
| 16 | count = 0; |
| 17 | do { |
| 18 | if (d->d_namep == 0) continue; |
| 19 | decode(name,d); |
| 20 | if (rnarg > 2) { |
| 21 | ptr0 = name; |
| 22 | ptr1 = *parg; |
| 23 | while (*ptr1) |
| 24 | if (*ptr0++ != *ptr1++) goto cont; |
| 25 | if (*ptr0 && *ptr0 != '/') goto cont; |
| 26 | } |
| 27 | (*how)(d); /* delete, extract, or taboc */ |
| 28 | ++count; |
| 29 | cont: continue; |
| 30 | } while (++d <= lastd); |
| 31 | if (count == 0 && rnarg > 2) |
| 32 | printf("%s not found\n", *parg); |
| 33 | ++parg; |
| 34 | } while (--narg > 2); |
| 35 | } |
| 36 | |
| 37 | delete(dd) |
| 38 | struct dent *dd; |
| 39 | { |
| 40 | if (verify('d') >= 0) |
| 41 | clrent(dd); |
| 42 | } |
| 43 | |
| 44 | |
| 45 | update() |
| 46 | { |
| 47 | register struct dent *d; |
| 48 | register b, last; |
| 49 | int first, size; |
| 50 | |
| 51 | |
| 52 | bitmap(); |
| 53 | d = &dir[0]; |
| 54 | do { |
| 55 | if(d->d_namep == 0 || (d->d_mode&OK) == 0) continue; |
| 56 | if (d->d_size == 0) continue; |
| 57 | /* find a place on the tape for this file */ |
| 58 | size = (d->d_size+BSIZE-1)/BSIZE; |
| 59 | first = ndentb; |
| 60 | toosmall: ++first; |
| 61 | if ((last = first + size) >= tapsiz) maperr(); |
| 62 | for (b = first; b < last; ++b) |
| 63 | if (map[(b>>3) & MAPMASK] & (1<<(b&7))) { |
| 64 | first = b; |
| 65 | goto toosmall; |
| 66 | }; |
| 67 | d->d_tapea = first; |
| 68 | setmap(d); |
| 69 | } while (++d <= lastd); |
| 70 | wrdir(); |
| 71 | update1(); |
| 72 | } |
| 73 | |
| 74 | |
| 75 | update1() |
| 76 | { |
| 77 | register struct dent *d, *id; |
| 78 | register index; |
| 79 | int f; |
| 80 | |
| 81 | for (;;) { |
| 82 | d = &dir[0]; |
| 83 | index = MTSIZ; |
| 84 | id = 0; |
| 85 | do { /* find new dent with lowest tape address */ |
| 86 | if(d->d_namep == 0 || (d->d_mode&OK) == 0) continue; |
| 87 | if (d->d_tapea < index) { |
| 88 | index = d->d_tapea; |
| 89 | id = d; |
| 90 | } |
| 91 | } while (++d <= lastd); |
| 92 | if ((d = id) == 0) return; |
| 93 | d->d_mode &= ~OK; /* change from new to old */ |
| 94 | if (d->d_size == 0) continue; |
| 95 | decode(name,d); |
| 96 | wseek(index); |
| 97 | if ((f = open(name,0)) < 0) { |
| 98 | printf("Can't open %s\n", name); |
| 99 | continue; |
| 100 | } |
| 101 | for (index = d->d_size/BSIZE; index != 0; --index) { |
| 102 | if (read(f,(char *)tapeb,BSIZE) != BSIZE) phserr(); |
| 103 | twrite(); |
| 104 | } |
| 105 | if (index = d->d_size % BSIZE) { |
| 106 | if (read(f,(char *)tapeb,index) != index) phserr(); |
| 107 | twrite(); |
| 108 | } |
| 109 | if (read(f,(char *)tapeb,1) != 0) phserr(); |
| 110 | close(f); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | phserr() |
| 115 | { printf("%s -- Phase error \n", name); } |
| 116 | |
| 117 | |
| 118 | bitmap() /* place old files in the map */ |
| 119 | { |
| 120 | register char *m; |
| 121 | register count; |
| 122 | register struct dent *d; |
| 123 | |
| 124 | for(m=map;m<&map[MAPSIZE];) *m++ = 0; |
| 125 | count = ndirent; |
| 126 | d = dir; |
| 127 | do { |
| 128 | if(d->d_namep != 0 && (d->d_mode&OK) == 0 |
| 129 | && d->d_size != 0) setmap(d); |
| 130 | d++; |
| 131 | } while (--count); |
| 132 | } |
| 133 | |
| 134 | setmap(d) |
| 135 | register struct dent *d; |
| 136 | { |
| 137 | unsigned c, block; |
| 138 | char bit; |
| 139 | int i; |
| 140 | |
| 141 | c = d->d_size/BSIZE; |
| 142 | if (d->d_size % BSIZE) c++; |
| 143 | block = d->d_tapea; |
| 144 | if ((c += block) >= tapsiz) maperr(); |
| 145 | do { |
| 146 | bit = 1 << (block & 7); |
| 147 | i = (block>>3) & MAPMASK; |
| 148 | if (bit & map[i]) maperr(); |
| 149 | map[i] |= bit; |
| 150 | } while (++block < c); |
| 151 | } |
| 152 | |
| 153 | maperr() |
| 154 | { |
| 155 | printf("Tape overflow\n"); |
| 156 | done(); |
| 157 | } |
| 158 | |
| 159 | |
| 160 | usage() |
| 161 | { |
| 162 | register reg,count; |
| 163 | int nused, nentr, nfree; |
| 164 | static lused; |
| 165 | |
| 166 | bitmap(); |
| 167 | for(count=0,nentr=0;count<ndirent;count++) |
| 168 | if(dir[count].d_namep != 0) nentr++; |
| 169 | nused = nfree = 0; |
| 170 | reg = ndentb; |
| 171 | ++reg; /* address of first non-directory tape block */ |
| 172 | count = tapsiz - reg; |
| 173 | do { |
| 174 | if (reg >= tapsiz) { |
| 175 | printf("Tape overflow\n"); |
| 176 | done(); |
| 177 | } |
| 178 | if (map[(reg>>3) & MAPMASK] & (1 << (reg&7))) { |
| 179 | nused++; |
| 180 | lused = reg; |
| 181 | } else { |
| 182 | if (flags & flm) break; |
| 183 | nfree++; |
| 184 | } |
| 185 | reg++; |
| 186 | } while (--count); |
| 187 | printf("%4d entries\n%4d used\n", nentr, nused); |
| 188 | if ((flags & flm)==0) |
| 189 | printf("%4d free\n", nfree); |
| 190 | printf("%4d last\n", lused); |
| 191 | } |
| 192 | |
| 193 | |
| 194 | taboc(dd) |
| 195 | struct dent *dd; |
| 196 | { |
| 197 | register mode; |
| 198 | register *m; |
| 199 | register char *s; |
| 200 | int count, *localtime(); |
| 201 | char work[20]; |
| 202 | |
| 203 | if (flags & flv) { |
| 204 | mode = dd->d_mode; |
| 205 | s = &work[19]; |
| 206 | *s = 0; |
| 207 | for (count = 3; count; --count) { |
| 208 | if (mode&1) *--s = 'x'; |
| 209 | else *--s = '-'; |
| 210 | if (mode&2) *--s = 'w'; |
| 211 | else *--s = '-'; |
| 212 | if (mode&4) *--s = 'r'; |
| 213 | else *--s = '-'; |
| 214 | mode >>= 3; |
| 215 | } |
| 216 | if (mode&4) s[2] = 's'; |
| 217 | if (mode&2) s[5] = 's'; |
| 218 | printf("%s%4d%4d%5d%9D ",s,dd->d_uid, dd->d_gid,dd->d_tapea,dd->d_size); |
| 219 | m = localtime(&dd->d_time); |
| 220 | printf("%2d/%2d/%2d %2d:%2d ",m[5],m[4]+1,m[3],m[2],m[1]); |
| 221 | } |
| 222 | printf("%s\n", name); |
| 223 | } |
| 224 | |
| 225 | |
| 226 | extract(d) |
| 227 | register struct dent *d; |
| 228 | { |
| 229 | register count, id; |
| 230 | |
| 231 | if (d->d_size==0) return; |
| 232 | if (verify('x') < 0) return; |
| 233 | rseek(d->d_tapea); |
| 234 | unlink(name); |
| 235 | if ((id = creat(name,d->d_mode)) < 0) |
| 236 | printf("%s -- create error\n", name); |
| 237 | count = d->d_size/BSIZE; |
| 238 | while (count--) { |
| 239 | tread(); |
| 240 | if (write(id, (char *)tapeb, BSIZE) != BSIZE) goto ng; |
| 241 | } |
| 242 | if (count = d->d_size % BSIZE) { |
| 243 | tread(); |
| 244 | if (write(id, (char *)tapeb, count) != count) { |
| 245 | ng: printf("%s -- write error\n", name); |
| 246 | close(id); |
| 247 | return; |
| 248 | } |
| 249 | } |
| 250 | close(id); |
| 251 | chown(name,d->d_uid & 0377, d->d_gid&0377); |
| 252 | } |