18 #include <atalk/adouble.h>
19 #include <netatalk/endian.h>
22 /* This allows megatron to generate .bin files that won't choke other
23 well-known converter apps. It also makes sure that checksums
24 always match. (RLB) */
25 #define MACBINARY_PLAY_NICE_WITH_OTHERS
27 /* String used to indicate standard input instead of a disk
28 file. Should be a string not normally used for a file
39 /* Size of a macbinary file header
41 #define HEADBUFSIZ 128
45 /* Both input and output routines use this struct and the
46 following globals; therefore this module can only be used
47 for one of the two functions at a time.
49 struct bin_file_data {
50 u_int32_t forklen[ NUMFORKS ];
51 char path[ MAXPATHLEN + 1];
54 time_t gmtoff; /* to convert from/to localtime */
57 extern char *forkname[];
58 u_char head_buf[HEADBUFSIZ];
61 * bin_open must be called first. pass it a filename that is supposed
62 * to contain a macbinary file. an bin struct will be allocated and
63 * somewhat initialized; bin_filed is set.
66 int bin_open( binfile, flags, fh, options )
77 fprintf( stderr, "entering bin_open\n" );
80 /* call localtime so that we get the timezone offset */
82 #ifndef NO_STRUCT_TM_GMTOFF
86 bin.gmtoff = tp->tm_gmtoff;
89 if ( flags == O_RDONLY ) { /* input */
90 if ( strcmp( binfile, STDIN ) == 0 ) {
91 bin.filed = fileno( stdin );
92 } else if (( bin.filed = open( binfile, flags )) < 0 ) {
97 fprintf( stderr, "opened %s for read\n", binfile );
99 if ((( rc = test_header() ) > 0 ) &&
100 ( bin_header_read( fh, rc ) == 0 )) {
103 fprintf( stderr, "%s is not a macbinary file.\n", binfile );
105 } else { /* output */
106 if (options & OPTION_STDOUT)
107 bin.filed = fileno(stdout);
109 maxlen = sizeof( bin.path ) - 1;
111 fprintf( stderr, "sizeof bin.path\t\t\t%d\n", sizeof( bin.path ));
112 fprintf( stderr, "maxlen \t\t\t\t%d\n", maxlen );
114 strncpy( bin.path, fh->name, maxlen );
115 strncpy( bin.path, mtoupath( bin.path ), maxlen );
116 strncat( bin.path, ".bin", maxlen - strlen( bin.path ));
117 if (( bin.filed = open( bin.path, flags, 0666 )) < 0 ) {
122 fprintf( stderr, "opened %s for write\n",
123 (options & OPTION_STDOUT) ? "(stdout)" : bin.path );
127 if ( bin_header_write( fh ) != 0 ) {
129 fprintf( stderr, "%s\n", bin.path );
137 * bin_close must be called before a second file can be opened using
138 * bin_open. Upon successful completion, a value of 0 is returned.
139 * Otherwise, a value of -1 is returned.
142 int bin_close( keepflag )
146 fprintf( stderr, "entering bin_close\n" );
148 if ( keepflag == KEEP ) {
149 return( close( bin.filed ));
150 } else if ( keepflag == TRASH ) {
151 if (( strcmp( bin.path, STDIN ) != 0 ) &&
152 ( unlink( bin.path ) < 0 )) {
160 * bin_read is called until it returns zero for each fork. when it is
161 * and finds that there is zero left to give, it seeks to the position
162 * of the next fork (if there is one ).
163 * bin_read must be called enough times to
164 * return zero and no more than that.
167 int bin_read( fork, buffer, length )
178 fprintf( stderr, "bin_read: fork is %s\n", forkname[ fork ] );
179 fprintf( stderr, "bin_read: remaining length is %d\n", bin.forklen[fork] );
182 if ( bin.forklen[ fork ] < 0 ) {
183 fprintf( stderr, "This should never happen, dude!\n" );
184 return( bin.forklen[ fork ] );
187 if ( bin.forklen[ fork ] == 0 ) {
188 if ( fork == DATA ) {
189 pos = lseek( bin.filed, 0, SEEK_CUR );
191 fprintf( stderr, "current position is %ld\n", pos );
195 pos = lseek( bin.filed, HEADBUFSIZ - pos, SEEK_CUR );
198 fprintf( stderr, "current position is %ld\n", pos );
204 if ( bin.forklen[ fork ] < length ) {
205 readlen = bin.forklen[ fork ];
210 fprintf( stderr, "bin_read: readlen is %d\n", readlen );
211 fprintf( stderr, "bin_read: cc is %d\n", cc );
215 while (( readlen > 0 ) && ( cc > 0 )) {
216 if (( cc = read( bin.filed, buf_ptr, readlen )) > 0 ) {
218 fprintf( stderr, "bin_read: cc is %d\n", cc );
225 cc = buf_ptr - buffer;
226 bin.forklen[ fork ] -= cc;
230 fprintf( stderr, "bin_read: chars read is %d\n", cc );
239 int bin_write( fork, buffer, length )
248 u_char padchar = 0x7f;
249 /* Not sure why, but it seems this must be 0x7f to match
250 other converters, not 0. (RLB) */
253 fprintf( stderr, "bin_write: fork is %s\n", forkname[ fork ] );
254 fprintf( stderr, "bin_write: remaining length is %d\n", bin.forklen[fork] );
257 if (( fork == RESOURCE ) && ( bin.forklen[ DATA ] != 0 )) {
258 fprintf( stderr, "Forklength error.\n" );
262 buf_ptr = (char *)buffer;
263 if ( bin.forklen[ fork ] >= length ) {
266 fprintf( stderr, "Forklength error.\n" );
271 fprintf( stderr, "bin_write: write length is %d\n", writelen );
274 while (( writelen > 0 ) && ( cc >= 0 )) {
275 cc = write( bin.filed, buf_ptr, writelen );
280 perror( "Couldn't write to macbinary file:" );
283 bin.forklen[ fork ] -= length;
285 if ( bin.forklen[ fork ] < 0 ) {
286 fprintf( stderr, "This should never happen, dude!\n" );
287 return( bin.forklen[ fork ] );
291 * add the padding at end of data and resource forks
294 if ( bin.forklen[ fork ] == 0 ) {
295 pos = lseek( bin.filed, 0, SEEK_CUR );
297 fprintf( stderr, "current position is %ld\n", pos );
300 if (pos != 0) { /* pad only if we need to */
301 pos = lseek( bin.filed, HEADBUFSIZ - pos - 1, SEEK_CUR );
302 if ( write( bin.filed, &padchar, 1 ) != 1 ) {
303 perror( "Couldn't write to macbinary file:" );
308 fprintf( stderr, "current position is %ld\n", pos );
313 fprintf( stderr, "\n" );
320 * bin_header_read is called by bin_open, and before any information can
321 * read from the fh substruct. it must be called before any
322 * of the bytes of the other two forks can be read, as well.
325 int bin_header_read( fh, revision )
332 * Set the appropriate finder flags mask for the type of macbinary
333 * file it is, and copy the extra macbinary II stuff from the header.
334 * If it is not a macbinary file revision of I or II, then return
338 switch ( revision ) {
341 mask = htons( 0xfcee );
342 memcpy(&fh->finder_info.fdFlags + 1, head_buf + 101,1 );
345 mask = htons( 0xfc00 );
353 * Go through and copy all the stuff you can get from the
354 * MacBinary header into the fh struct. What fun!
357 memcpy(fh->name, head_buf + 2, head_buf[ 1 ] );
358 memcpy(&fh->create_date, head_buf + 91, 4 );
359 fh->create_date = MAC_DATE_TO_UNIX(fh->create_date) - bin.gmtoff;
360 fh->create_date = AD_DATE_FROM_UNIX(fh->create_date);
361 memcpy( &fh->mod_date, head_buf + 95, 4 );
362 fh->mod_date = MAC_DATE_TO_UNIX(fh->mod_date) - bin.gmtoff;
363 fh->mod_date = AD_DATE_FROM_UNIX(fh->mod_date);
364 fh->backup_date = AD_DATE_START;
365 memcpy( &fh->finder_info, head_buf + 65, 8 );
367 #ifndef MACBINARY_PLAY_NICE_WITH_OTHERS /* (RLB) */
368 memcpy( &fh->finder_info.fdFlags, head_buf + 73, 1 );
369 fh->finder_info.fdFlags &= mask;
371 memcpy( &fh->finder_info.fdFlags, head_buf + 73, 2 );
372 #endif /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
374 memcpy(&fh->finder_info.fdLocation, head_buf + 75, 4 );
375 memcpy(&fh->finder_info.fdFldr, head_buf + 79, 2 );
376 memcpy(&fh->forklen[ DATA ], head_buf + 83, 4 );
377 bin.forklen[ DATA ] = ntohl( fh->forklen[ DATA ] );
378 memcpy(&fh->forklen[ RESOURCE ], head_buf + 87, 4 );
379 bin.forklen[ RESOURCE ] = ntohl( fh->forklen[ RESOURCE ] );
380 fh->comment[0] = '\0';
383 fh->finder_xinfo.fdScript = *(head_buf + 106);
384 fh->finder_xinfo.fdXFlags = *(head_buf + 107);
392 fprintf( stderr, "Values read by bin_header_read\n" );
393 fprintf( stderr, "name length\t\t%d\n", head_buf[ 1 ] );
394 fprintf( stderr, "file name\t\t%s\n", fh->name );
395 fprintf( stderr, "get info comment\t%s\n", fh->comment );
396 fprintf( stderr, "type\t\t\t%.*s\n", sizeof( fh->finder_info.fdType ),
397 &fh->finder_info.fdType );
398 fprintf( stderr, "creator\t\t\t%.*s\n",
399 sizeof( fh->finder_info.fdCreator ),
400 &fh->finder_info.fdCreator );
401 memcpy( &flags, &fh->finder_info.fdFlags, sizeof( flags ));
402 flags = ntohs( flags );
403 fprintf( stderr, "flags\t\t\t%x\n", flags );
405 /* Show fdLocation too (RLB) */
406 memcpy( &flags_long, &fh->finder_info.fdLocation,
407 sizeof( flags_long ));
408 flags_long = ntohl( flags_long );
409 fprintf( stderr, "location flags\t\t%lx\n", flags_long );
411 fprintf( stderr, "data fork length\t%ld\n", bin.forklen[DATA] );
412 fprintf( stderr, "resource fork length\t%ld\n", bin.forklen[RESOURCE] );
413 fprintf( stderr, "\n" );
421 * bin_header_write is called by bin_open, and relies on information
422 * from the fh substruct. it must be called before any
423 * of the bytes of the other two forks can be written, as well.
424 * bin_header_write and bin_header_read are opposites.
427 int bin_header_write( fh )
435 memset(head_buf, 0, sizeof( head_buf ));
436 head_buf[ 1 ] = (u_char)strlen( fh->name );
437 memcpy( head_buf + 2, fh->name, head_buf[ 1 ] );
438 memcpy( head_buf + 65, &fh->finder_info, 8 );
440 #ifndef MACBINARY_PLAY_NICE_WITH_OTHERS /* (RLB) */
441 memcpy( head_buf + 73, &fh->finder_info.fdFlags, 1 );
443 memcpy( head_buf + 73, &fh->finder_info.fdFlags, 2 );
444 #endif /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
446 memcpy( head_buf + 75, &fh->finder_info.fdLocation, 4 );
447 memcpy( head_buf + 79, &fh->finder_info.fdFldr, 2 );
448 memcpy( head_buf + 83, &fh->forklen[ DATA ], 4 );
449 memcpy( head_buf + 87, &fh->forklen[ RESOURCE ], 4 );
450 t = AD_DATE_TO_UNIX(fh->create_date) + bin.gmtoff;
451 t = MAC_DATE_FROM_UNIX(t);
452 memcpy( head_buf + 91, &t, sizeof(t) );
453 t = AD_DATE_TO_UNIX(fh->mod_date) + bin.gmtoff;
454 t = MAC_DATE_FROM_UNIX(t);
455 memcpy( head_buf + 95, &t, sizeof(t) );
456 memcpy( head_buf + 101, &fh->finder_info.fdFlags + 1, 1);
459 memcpy( head_buf + 102, "mBIN", 4);
460 *(head_buf + 106) = fh->finder_xinfo.fdScript;
461 *(head_buf + 107) = fh->finder_xinfo.fdXFlags;
462 head_buf[ 122 ] = 130;
464 head_buf[ 123 ] = 129;
466 bin.headercrc = htons( updcrc( (u_short) 0, head_buf, 124 ));
467 memcpy(head_buf + 124, &bin.headercrc, sizeof( bin.headercrc ));
469 bin.forklen[ DATA ] = ntohl( fh->forklen[ DATA ] );
470 bin.forklen[ RESOURCE ] = ntohl( fh->forklen[ RESOURCE ] );
477 fprintf( stderr, "Values written by bin_header_write\n" );
478 fprintf( stderr, "name length\t\t%d\n", head_buf[ 1 ] );
479 fprintf( stderr, "file name\t\t%s\n", (char *)&head_buf[ 2 ] );
480 fprintf( stderr, "type\t\t\t%.4s\n", (char *)&head_buf[ 65 ] );
481 fprintf( stderr, "creator\t\t\t%.4s\n", (char *)&head_buf[ 69 ] );
483 memcpy( &flags, &fh->finder_info.fdFlags, sizeof( flags ));
484 flags = ntohs( flags );
485 fprintf( stderr, "flags\t\t\t%x\n", flags );
487 /* Show fdLocation too (RLB) */
488 memcpy( &flags_long, &fh->finder_info.fdLocation,
489 sizeof( flags_long ));
490 flags_long = ntohl( flags_long );
491 fprintf( stderr, "location flags\t\t%ldx\n", flags_long );
493 fprintf( stderr, "data fork length\t%ld\n", bin.forklen[DATA] );
494 fprintf( stderr, "resource fork length\t%ld\n", bin.forklen[RESOURCE] );
495 fprintf( stderr, "\n" );
499 write_ptr = (char *)head_buf;
500 wc = sizeof( head_buf );
502 while (( wc > 0 ) && ( wr >= 0 )) {
503 wr = write( bin.filed, write_ptr, wc );
508 perror( "Couldn't write macbinary header:" );
516 * test_header is called from bin_open. it checks certain values of
517 * the first 128 bytes, determines if the file is a MacBinary,
518 * MacBinary II, MacBinary III, or non-MacBinary file, and returns a
519 * one, two, three or negative one to indicate the file type.
521 * If the signature at 102 is equal to "mBIN," then it's a MacBinary
522 * III file. Bytes 0 and 74 must be zero for the file to be any type
523 * of MacBinary. If the crc of bytes 0 through 123 equals the value
524 * at offset 124 then it is a MacBinary II. If not, then if byte 82
525 * is zero, byte 2 is a valid value for a mac filename length (between
526 * one and sixty-three), and bytes 101 through 125 are all zero, then
527 * the file is a MacBinary.
529 * NOTE: apple's MacBinary II files have a non-zero value at byte 74.
530 * so, the check for byte 74 isn't very useful.
535 const char zeros[25] = "";
541 fprintf( stderr, "entering test_header\n" );
544 cc = read( bin.filed, (char *)head_buf, sizeof( head_buf ));
545 if ( cc < sizeof( head_buf )) {
546 perror( "Premature end of file :" );
551 fprintf( stderr, "was able to read HEADBUFSIZ bytes\n" );
554 /* check for macbinary III header */
555 if (memcmp(head_buf + 102, "mBIN", 4) == 0)
558 /* check for macbinary II even if only one of the bytes is zero */
559 if (( head_buf[ 0 ] == 0 ) || ( head_buf[ 74 ] == 0 )) {
561 fprintf( stderr, "byte 0 and 74 are both zero\n" );
563 bin.headercrc = updcrc( (u_short) 0, head_buf, 124 );
564 memcpy(&header_crc, head_buf + 124, sizeof( header_crc ));
565 header_crc = ntohs( header_crc );
566 if ( header_crc == bin.headercrc ) {
571 fprintf( stderr, "header crc didn't pan out\n" );
575 /* now see if we have a macbinary file. */
576 if ( head_buf[ 82 ] != 0 ) {
579 memcpy( &namelen, head_buf + 1, sizeof( namelen ));
581 fprintf( stderr, "name length is %d\n", namelen );
583 if (( namelen < 1 ) || ( namelen > 63 )) {
587 /* bytes 101 - 125 should be zero */
588 if (memcmp(head_buf + 101, zeros, sizeof(zeros)) != 0)
591 /* macbinary forks aren't larger than 0x7FFFFF */
592 memcpy(&cc, head_buf + 83, sizeof(cc));
596 memcpy(&cc, head_buf + 87, sizeof(cc));
603 fprintf( stderr, "byte 82 is zero and name length is cool\n" );