iso9660.h (9133B)
1 /* 2 * iso9660.h 3 * 4 * Routines and data structures to support reading and writing 5 * ISO 9660 CD images. See the ISO 9660 or ECMA 119 standards. 6 * 7 * Also supports Rock Ridge extensions for long file names and Unix stuff. 8 * Also supports Microsoft's Joliet extensions for Unicode and long file names. 9 * Also supports El Torito bootable CD spec. 10 */ 11 12 typedef struct Cdimg Cdimg; 13 typedef struct Cdinfo Cdinfo; 14 typedef struct Conform Conform; 15 typedef struct Direc Direc; 16 typedef struct Dumproot Dumproot; 17 typedef struct Voldesc Voldesc; 18 typedef struct XDir XDir; 19 20 #ifndef CHLINK 21 #define CHLINK 0 22 #endif 23 24 struct XDir { 25 char *name; 26 char *uid; 27 char *gid; 28 char *symlink; 29 ulong uidno; /* Numeric uid */ 30 ulong gidno; /* Numeric gid */ 31 32 ulong mode; 33 ulong atime; 34 ulong mtime; 35 ulong ctime; 36 37 vlong length; 38 }; 39 40 /* 41 * A directory entry in a ISO9660 tree. 42 * The extra data (uid, etc.) here is put into the system use areas. 43 */ 44 struct Direc { 45 char *name; /* real name */ 46 char *confname; /* conformant name */ 47 char *srcfile; /* file to copy onto the image */ 48 49 ulong block; 50 ulong length; 51 int flags; 52 53 char *uid; 54 char *gid; 55 char *symlink; 56 ulong mode; 57 long atime; 58 long ctime; 59 long mtime; 60 61 ulong uidno; 62 ulong gidno; 63 64 Direc *child; 65 int nchild; 66 }; 67 enum { /* Direc flags */ 68 Dbadname = 1<<0 /* Non-conformant name */ 69 }; 70 71 /* 72 * Data found in a volume descriptor. 73 */ 74 struct Voldesc { 75 char *systemid; 76 char *volumeset; 77 char *publisher; 78 char *preparer; 79 char *application; 80 81 /* file names for various parameters */ 82 char *abstract; 83 char *biblio; 84 char *notice; 85 86 /* path table */ 87 ulong pathsize; 88 ulong lpathloc; 89 ulong mpathloc; 90 91 /* root of file tree */ 92 Direc root; 93 }; 94 95 /* 96 * An ISO9660 CD image. Various parameters are kept in memory but the 97 * real image file is opened for reading and writing on fd. 98 * 99 * The bio buffers brd and bwr moderate reading and writing to the image. 100 * The routines we use are careful to flush one before or after using the other, 101 * as necessary. 102 */ 103 struct Cdimg { 104 char *file; 105 int fd; 106 ulong dumpblock; 107 ulong nextblock; 108 ulong iso9660pvd; 109 ulong jolietsvd; 110 ulong pathblock; 111 ulong rrcontin; /* rock ridge continuation offset */ 112 ulong nulldump; /* next dump block */ 113 ulong nconform; /* number of conform entries written already */ 114 ulong bootcatptr; 115 ulong bootcatblock; 116 ulong bootimageptr; 117 Direc *bootdirec; 118 char *bootimage; 119 120 Biobuf brd; 121 Biobuf bwr; 122 123 int flags; 124 125 Voldesc iso; 126 Voldesc joliet; 127 }; 128 enum { /* Cdimg->flags, Cdinfo->flags */ 129 CDjoliet = 1<<0, 130 CDplan9 = 1<<1, 131 CDconform = 1<<2, 132 CDrockridge = 1<<3, 133 CDnew = 1<<4, 134 CDdump = 1<<5, 135 CDbootable = 1<<6 136 }; 137 138 typedef struct Tx Tx; 139 struct Tx { 140 char *bad; /* atoms */ 141 char *good; 142 }; 143 144 struct Conform { 145 Tx *t; 146 int nt; /* delta = 32 */ 147 }; 148 149 struct Cdinfo { 150 int flags; 151 152 char *volumename; 153 154 char *volumeset; 155 char *publisher; 156 char *preparer; 157 char *application; 158 char *bootimage; 159 }; 160 161 enum { 162 Blocklen = 2048 163 }; 164 165 /* 166 * This is a doubly binary tree. 167 * We have a tree keyed on the MD5 values 168 * as well as a tree keyed on the block numbers. 169 */ 170 typedef struct Dump Dump; 171 typedef struct Dumpdir Dumpdir; 172 173 struct Dump { 174 Cdimg *cd; 175 Dumpdir *md5root; 176 Dumpdir *blockroot; 177 }; 178 179 struct Dumpdir { 180 char *name; 181 uchar md5[MD5dlen]; 182 ulong block; 183 ulong length; 184 Dumpdir *md5left; 185 Dumpdir *md5right; 186 Dumpdir *blockleft; 187 Dumpdir *blockright; 188 }; 189 190 struct Dumproot { 191 char *name; 192 int nkid; 193 Dumproot *kid; 194 Direc root; 195 Direc jroot; 196 }; 197 198 /* 199 * ISO9660 on-CD structures. 200 */ 201 typedef struct Cdir Cdir; 202 typedef struct Cpath Cpath; 203 typedef struct Cvoldesc Cvoldesc; 204 205 /* a volume descriptor block */ 206 struct Cvoldesc { 207 uchar magic[8]; /* 0x01, "CD001", 0x01, 0x00 */ 208 uchar systemid[32]; /* system identifier */ 209 uchar volumeid[32]; /* volume identifier */ 210 uchar unused[8]; /* character set in secondary desc */ 211 uchar volsize[8]; /* volume size */ 212 uchar charset[32]; 213 uchar volsetsize[4]; /* volume set size = 1 */ 214 uchar volseqnum[4]; /* volume sequence number = 1 */ 215 uchar blocksize[4]; /* logical block size */ 216 uchar pathsize[8]; /* path table size */ 217 uchar lpathloc[4]; /* Lpath */ 218 uchar olpathloc[4]; /* optional Lpath */ 219 uchar mpathloc[4]; /* Mpath */ 220 uchar ompathloc[4]; /* optional Mpath */ 221 uchar rootdir[34]; /* directory entry for root */ 222 uchar volumeset[128]; /* volume set identifier */ 223 uchar publisher[128]; 224 uchar preparer[128]; /* data preparer identifier */ 225 uchar application[128]; /* application identifier */ 226 uchar notice[37]; /* copyright notice file */ 227 uchar abstract[37]; /* abstract file */ 228 uchar biblio[37]; /* bibliographic file */ 229 uchar cdate[17]; /* creation date */ 230 uchar mdate[17]; /* modification date */ 231 uchar xdate[17]; /* expiration date */ 232 uchar edate[17]; /* effective date */ 233 uchar fsvers; /* file system version = 1 */ 234 }; 235 236 /* a directory entry */ 237 struct Cdir { 238 uchar len; 239 uchar xlen; 240 uchar dloc[8]; 241 uchar dlen[8]; 242 uchar date[7]; 243 uchar flags; 244 uchar unitsize; 245 uchar gapsize; 246 uchar volseqnum[4]; 247 uchar namelen; 248 uchar name[1]; /* chumminess */ 249 }; 250 251 /* a path table entry */ 252 struct Cpath { 253 uchar namelen; 254 uchar xlen; 255 uchar dloc[4]; 256 uchar parent[2]; 257 uchar name[1]; /* chumminess */ 258 }; 259 260 enum { /* Rockridge flags */ 261 RR_PX = 1<<0, 262 RR_PN = 1<<1, 263 RR_SL = 1<<2, 264 RR_NM = 1<<3, 265 RR_CL = 1<<4, 266 RR_PL = 1<<5, 267 RR_RE = 1<<6, 268 RR_TF = 1<<7 269 }; 270 271 enum { /* CputrripTF type argument */ 272 TFcreation = 1<<0, 273 TFmodify = 1<<1, 274 TFaccess = 1<<2, 275 TFattributes = 1<<3, 276 TFbackup = 1<<4, 277 TFexpiration = 1<<5, 278 TFeffective = 1<<6, 279 TFlongform = 1<<7 280 }; 281 282 enum { /* CputrripNM flag types */ 283 NMcontinue = 1<<0, 284 NMcurrent = 1<<1, 285 NMparent = 1<<2, 286 NMroot = 1<<3, 287 NMvolroot = 1<<4, 288 NMhost = 1<<5 289 }; 290 291 /* boot.c */ 292 void Cputbootvol(Cdimg*); 293 void Cputbootcat(Cdimg*); 294 void Cupdatebootvol(Cdimg*); 295 void Cupdatebootcat(Cdimg*); 296 void findbootimage(Cdimg*, Direc*); 297 298 /* cdrdwr.c */ 299 Cdimg *createcd(char*, Cdinfo); 300 Cdimg *opencd(char*, Cdinfo); 301 void Creadblock(Cdimg*, void*, ulong, ulong); 302 ulong big(void*, int); 303 ulong little(void*, int); 304 int parsedir(Cdimg*, Direc*, uchar*, int, char *(*)(uchar*, int)); 305 void setroot(Cdimg*, ulong, ulong, ulong); 306 void setvolsize(Cdimg*, ulong, ulong); 307 void setpathtable(Cdimg*, ulong, ulong, ulong, ulong); 308 void Cputc(Cdimg*, int); 309 void Cputnl(Cdimg*, ulong, int); 310 void Cputnm(Cdimg*, ulong, int); 311 void Cputn(Cdimg*, long, int); 312 void Crepeat(Cdimg*, int, int); 313 void Cputs(Cdimg*, char*, int); 314 void Cwrite(Cdimg*, void*, int); 315 void Cputr(Cdimg*, Rune); 316 void Crepeatr(Cdimg*, Rune, int); 317 void Cputrs(Cdimg*, Rune*, int); 318 void Cputrscvt(Cdimg*, char*, int); 319 void Cpadblock(Cdimg*); 320 void Cputdate(Cdimg*, ulong); 321 void Cputdate1(Cdimg*, ulong); 322 void Cread(Cdimg*, void*, int); 323 void Cwflush(Cdimg*); 324 void Cwseek(Cdimg*, ulong); 325 ulong Cwoffset(Cdimg*); 326 ulong Croffset(Cdimg*); 327 int Cgetc(Cdimg*); 328 void Crseek(Cdimg*, ulong); 329 char *Crdline(Cdimg*, int); 330 int Clinelen(Cdimg*); 331 332 /* conform.c */ 333 void rdconform(Cdimg*); 334 char *conform(char*, int); 335 void wrconform(Cdimg*, int, ulong*, ulong*); 336 337 /* direc.c */ 338 void mkdirec(Direc*, XDir*); 339 Direc *walkdirec(Direc*, char*); 340 Direc *adddirec(Direc*, char*, XDir*); 341 void copydirec(Direc*, Direc*); 342 void checknames(Direc*, int (*)(char*)); 343 void convertnames(Direc*, char* (*)(char*, char*)); 344 void dsort(Direc*, int (*)(const void*, const void*)); 345 void setparents(Direc*); 346 347 /* dump.c */ 348 ulong Cputdumpblock(Cdimg*); 349 int hasdump(Cdimg*); 350 Dump *dumpcd(Cdimg*, Direc*); 351 Dumpdir *lookupmd5(Dump*, uchar*); 352 void insertmd5(Dump*, char*, uchar*, ulong, ulong); 353 354 Direc readdumpdirs(Cdimg*, XDir*, char*(*)(uchar*,int)); 355 char *adddumpdir(Direc*, ulong, XDir*); 356 void copybutname(Direc*, Direc*); 357 358 void readkids(Cdimg*, Direc*, char*(*)(uchar*,int)); 359 void freekids(Direc*); 360 void readdumpconform(Cdimg*); 361 void rmdumpdir(Direc*, char*); 362 363 /* ichar.c */ 364 char *isostring(uchar*, int); 365 int isbadiso9660(char*); 366 int isocmp(const void*, const void*); 367 int isisofrog(char); 368 void Cputisopvd(Cdimg*, Cdinfo); 369 370 /* jchar.c */ 371 char *jolietstring(uchar*, int); 372 int isbadjoliet(char*); 373 int jolietcmp(const void*, const void*); 374 int isjolietfrog(Rune); 375 void Cputjolietsvd(Cdimg*, Cdinfo); 376 377 /* path.c */ 378 void writepathtables(Cdimg*); 379 380 /* util.c */ 381 void *emalloc(ulong); 382 void *erealloc(void*, ulong); 383 char *atom(char*); 384 char *struprcpy(char*, char*); 385 int chat(char*, ...); 386 387 /* unix.c, plan9.c */ 388 void dirtoxdir(XDir*, Dir*); 389 void fdtruncate(int, ulong); 390 long uidno(char*); 391 long gidno(char*); 392 393 /* rune.c */ 394 Rune *strtorune(Rune*, char*); 395 Rune *runechr(Rune*, Rune); 396 int runecmp(Rune*, Rune*); 397 398 /* sysuse.c */ 399 int Cputsysuse(Cdimg*, Direc*, int, int, int); 400 401 /* write.c */ 402 void writefiles(Dump*, Cdimg*, Direc*); 403 void writedirs(Cdimg*, Direc*, int(*)(Cdimg*, Direc*, int, int, int)); 404 void writedumpdirs(Cdimg*, Direc*, int(*)(Cdimg*, Direc*, int, int, int)); 405 int Cputisodir(Cdimg*, Direc*, int, int, int); 406 int Cputjolietdir(Cdimg*, Direc*, int, int, int); 407 void Cputendvd(Cdimg*); 408 409 enum { 410 Blocksize = 2048, 411 Ndirblock = 16, /* directory blocks allocated at once */ 412 413 DTdot = 0, 414 DTdotdot, 415 DTiden, 416 DTroot, 417 DTrootdot 418 }; 419 420 extern ulong now; 421 extern Conform *map; 422 extern int chatty; 423 extern int docolon; 424 extern int mk9660;