2 * $Id: macbin.c,v 1.10 2002-02-16 17:12:53 srittau Exp $
7 #endif /* HAVE_CONFIG_H */
12 #include <sys/param.h>
15 #endif /* HAVE_FCNTL_H */
18 #endif /* HAVE_UNISTD_H */
25 #include <atalk/adouble.h>
26 #include <netatalk/endian.h>
30 /* This allows megatron to generate .bin files that won't choke other
31 well-known converter apps. It also makes sure that checksums
32 always match. (RLB) */
33 #define MACBINARY_PLAY_NICE_WITH_OTHERS
35 /* String used to indicate standard input instead of a disk
36 file. Should be a string not normally used for a file
47 /* Size of a macbinary file header
49 #define HEADBUFSIZ 128
51 /* Both input and output routines use this struct and the
52 following globals; therefore this module can only be used
53 for one of the two functions at a time.
55 struct bin_file_data {
56 u_int32_t forklen[ NUMFORKS ];
57 char path[ MAXPATHLEN + 1];
60 time_t gmtoff; /* to convert from/to localtime */
63 extern char *forkname[];
64 u_char head_buf[HEADBUFSIZ];
67 * bin_open must be called first. pass it a filename that is supposed
68 * to contain a macbinary file. an bin struct will be allocated and
69 * somewhat initialized; bin_filed is set.
72 int bin_open( binfile, flags, fh, options )
83 fprintf( stderr, "entering bin_open\n" );
86 /* call localtime so that we get the timezone offset */
88 #ifndef NO_STRUCT_TM_GMTOFF
92 bin.gmtoff = tp->tm_gmtoff;
93 #endif /* ! NO_STRUCT_TM_GMTOFF */
95 if ( flags == O_RDONLY ) { /* input */
96 if ( strcmp( binfile, STDIN ) == 0 ) {
97 bin.filed = fileno( stdin );
98 } else if (( bin.filed = open( binfile, flags )) < 0 ) {
103 fprintf( stderr, "opened %s for read\n", binfile );
105 if ((( rc = test_header() ) > 0 ) &&
106 ( bin_header_read( fh, rc ) == 0 )) {
109 fprintf( stderr, "%s is not a macbinary file.\n", binfile );
111 } else { /* output */
112 if (options & OPTION_STDOUT)
113 bin.filed = fileno(stdout);
115 maxlen = sizeof( bin.path ) - 1;
117 fprintf( stderr, "sizeof bin.path\t\t\t%d\n", sizeof( bin.path ));
118 fprintf( stderr, "maxlen \t\t\t\t%d\n", maxlen );
120 strncpy( bin.path, fh->name, maxlen );
121 strncpy( bin.path, mtoupath( bin.path ), maxlen );
122 strncat( bin.path, ".bin", maxlen - strlen( bin.path ));
123 if (( bin.filed = open( bin.path, flags, 0666 )) < 0 ) {
128 fprintf( stderr, "opened %s for write\n",
129 (options & OPTION_STDOUT) ? "(stdout)" : bin.path );
133 if ( bin_header_write( fh ) != 0 ) {
135 fprintf( stderr, "%s\n", bin.path );
143 * bin_close must be called before a second file can be opened using
144 * bin_open. Upon successful completion, a value of 0 is returned.
145 * Otherwise, a value of -1 is returned.
148 int bin_close( keepflag )
152 fprintf( stderr, "entering bin_close\n" );
154 if ( keepflag == KEEP ) {
155 return( close( bin.filed ));
156 } else if ( keepflag == TRASH ) {
157 if (( strcmp( bin.path, STDIN ) != 0 ) &&
158 ( unlink( bin.path ) < 0 )) {
166 * bin_read is called until it returns zero for each fork. when it is
167 * and finds that there is zero left to give, it seeks to the position
168 * of the next fork (if there is one ).
169 * bin_read must be called enough times to
170 * return zero and no more than that.
173 int bin_read( fork, buffer, length )
184 fprintf( stderr, "bin_read: fork is %s\n", forkname[ fork ] );
185 fprintf( stderr, "bin_read: remaining length is %d\n", bin.forklen[fork] );
186 #endif /* DEBUG >= 3 */
188 if ( bin.forklen[ fork ] < 0 ) {
189 fprintf( stderr, "This should never happen, dude!\n" );
190 return( bin.forklen[ fork ] );
193 if ( bin.forklen[ fork ] == 0 ) {
194 if ( fork == DATA ) {
195 pos = lseek( bin.filed, 0, SEEK_CUR );
197 fprintf( stderr, "current position is %ld\n", pos );
201 pos = lseek( bin.filed, HEADBUFSIZ - pos, SEEK_CUR );
204 fprintf( stderr, "current position is %ld\n", pos );
210 if ( bin.forklen[ fork ] < length ) {
211 readlen = bin.forklen[ fork ];
216 fprintf( stderr, "bin_read: readlen is %d\n", readlen );
217 fprintf( stderr, "bin_read: cc is %d\n", cc );
218 #endif /* DEBUG >= 3 */
221 while (( readlen > 0 ) && ( cc > 0 )) {
222 if (( cc = read( bin.filed, buf_ptr, readlen )) > 0 ) {
224 fprintf( stderr, "bin_read: cc is %d\n", cc );
225 #endif /* DEBUG >= 3 */
231 cc = buf_ptr - buffer;
232 bin.forklen[ fork ] -= cc;
236 fprintf( stderr, "bin_read: chars read is %d\n", cc );
237 #endif /* DEBUG >= 3 */
245 int bin_write( fork, buffer, length )
254 u_char padchar = 0x7f;
255 /* Not sure why, but it seems this must be 0x7f to match
256 other converters, not 0. (RLB) */
259 fprintf( stderr, "bin_write: fork is %s\n", forkname[ fork ] );
260 fprintf( stderr, "bin_write: remaining length is %d\n", bin.forklen[fork] );
261 #endif /* DEBUG >= 3 */
263 if (( fork == RESOURCE ) && ( bin.forklen[ DATA ] != 0 )) {
264 fprintf( stderr, "Forklength error.\n" );
268 buf_ptr = (char *)buffer;
269 if ( bin.forklen[ fork ] >= length ) {
272 fprintf( stderr, "Forklength error.\n" );
277 fprintf( stderr, "bin_write: write length is %d\n", writelen );
278 #endif /* DEBUG >= 3 */
280 while (( writelen > 0 ) && ( cc >= 0 )) {
281 cc = write( bin.filed, buf_ptr, writelen );
286 perror( "Couldn't write to macbinary file:" );
289 bin.forklen[ fork ] -= length;
291 if ( bin.forklen[ fork ] < 0 ) {
292 fprintf( stderr, "This should never happen, dude!\n" );
293 return( bin.forklen[ fork ] );
297 * add the padding at end of data and resource forks
300 if ( bin.forklen[ fork ] == 0 ) {
301 pos = lseek( bin.filed, 0, SEEK_CUR );
303 fprintf( stderr, "current position is %ld\n", pos );
306 if (pos != 0) { /* pad only if we need to */
307 pos = lseek( bin.filed, HEADBUFSIZ - pos - 1, SEEK_CUR );
308 if ( write( bin.filed, &padchar, 1 ) != 1 ) {
309 perror( "Couldn't write to macbinary file:" );
314 fprintf( stderr, "current position is %ld\n", pos );
319 fprintf( stderr, "\n" );
326 * bin_header_read is called by bin_open, and before any information can
327 * read from the fh substruct. it must be called before any
328 * of the bytes of the other two forks can be read, as well.
331 int bin_header_read( fh, revision )
338 * Set the appropriate finder flags mask for the type of macbinary
339 * file it is, and copy the extra macbinary II stuff from the header.
340 * If it is not a macbinary file revision of I or II, then return
344 switch ( revision ) {
347 mask = htons( 0xfcee );
348 memcpy(&fh->finder_info.fdFlags + 1, head_buf + 101,1 );
351 mask = htons( 0xfc00 );
359 * Go through and copy all the stuff you can get from the
360 * MacBinary header into the fh struct. What fun!
363 memcpy(fh->name, head_buf + 2, head_buf[ 1 ] );
364 memcpy(&fh->create_date, head_buf + 91, 4 );
365 fh->create_date = MAC_DATE_TO_UNIX(fh->create_date) - bin.gmtoff;
366 fh->create_date = AD_DATE_FROM_UNIX(fh->create_date);
367 memcpy( &fh->mod_date, head_buf + 95, 4 );
368 fh->mod_date = MAC_DATE_TO_UNIX(fh->mod_date) - bin.gmtoff;
369 fh->mod_date = AD_DATE_FROM_UNIX(fh->mod_date);
370 fh->backup_date = AD_DATE_START;
371 memcpy( &fh->finder_info, head_buf + 65, 8 );
373 #ifndef MACBINARY_PLAY_NICE_WITH_OTHERS /* (RLB) */
374 memcpy( &fh->finder_info.fdFlags, head_buf + 73, 1 );
375 fh->finder_info.fdFlags &= mask;
376 #else /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
377 memcpy( &fh->finder_info.fdFlags, head_buf + 73, 2 );
378 #endif /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
380 memcpy(&fh->finder_info.fdLocation, head_buf + 75, 4 );
381 memcpy(&fh->finder_info.fdFldr, head_buf + 79, 2 );
382 memcpy(&fh->forklen[ DATA ], head_buf + 83, 4 );
383 bin.forklen[ DATA ] = ntohl( fh->forklen[ DATA ] );
384 memcpy(&fh->forklen[ RESOURCE ], head_buf + 87, 4 );
385 bin.forklen[ RESOURCE ] = ntohl( fh->forklen[ RESOURCE ] );
386 fh->comment[0] = '\0';
389 fh->finder_xinfo.fdScript = *(head_buf + 106);
390 fh->finder_xinfo.fdXFlags = *(head_buf + 107);
398 fprintf( stderr, "Values read by bin_header_read\n" );
399 fprintf( stderr, "name length\t\t%d\n", head_buf[ 1 ] );
400 fprintf( stderr, "file name\t\t%s\n", fh->name );
401 fprintf( stderr, "get info comment\t%s\n", fh->comment );
402 fprintf( stderr, "type\t\t\t%.*s\n", sizeof( fh->finder_info.fdType ),
403 &fh->finder_info.fdType );
404 fprintf( stderr, "creator\t\t\t%.*s\n",
405 sizeof( fh->finder_info.fdCreator ),
406 &fh->finder_info.fdCreator );
407 memcpy( &flags, &fh->finder_info.fdFlags, sizeof( flags ));
408 flags = ntohs( flags );
409 fprintf( stderr, "flags\t\t\t%x\n", flags );
411 /* Show fdLocation too (RLB) */
412 memcpy( &flags_long, &fh->finder_info.fdLocation,
413 sizeof( flags_long ));
414 flags_long = ntohl( flags_long );
415 fprintf( stderr, "location flags\t\t%lx\n", flags_long );
417 fprintf( stderr, "data fork length\t%ld\n", bin.forklen[DATA] );
418 fprintf( stderr, "resource fork length\t%ld\n", bin.forklen[RESOURCE] );
419 fprintf( stderr, "\n" );
421 #endif /* DEBUG >= 5 */
427 * bin_header_write is called by bin_open, and relies on information
428 * from the fh substruct. it must be called before any
429 * of the bytes of the other two forks can be written, as well.
430 * bin_header_write and bin_header_read are opposites.
433 int bin_header_write( fh )
441 memset(head_buf, 0, sizeof( head_buf ));
442 head_buf[ 1 ] = (u_char)strlen( fh->name );
443 memcpy( head_buf + 2, fh->name, head_buf[ 1 ] );
444 memcpy( head_buf + 65, &fh->finder_info, 8 );
446 #ifndef MACBINARY_PLAY_NICE_WITH_OTHERS /* (RLB) */
447 memcpy( head_buf + 73, &fh->finder_info.fdFlags, 1 );
448 #else /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
449 memcpy( head_buf + 73, &fh->finder_info.fdFlags, 2 );
450 #endif /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
452 memcpy( head_buf + 75, &fh->finder_info.fdLocation, 4 );
453 memcpy( head_buf + 79, &fh->finder_info.fdFldr, 2 );
454 memcpy( head_buf + 83, &fh->forklen[ DATA ], 4 );
455 memcpy( head_buf + 87, &fh->forklen[ RESOURCE ], 4 );
456 t = AD_DATE_TO_UNIX(fh->create_date) + bin.gmtoff;
457 t = MAC_DATE_FROM_UNIX(t);
458 memcpy( head_buf + 91, &t, sizeof(t) );
459 t = AD_DATE_TO_UNIX(fh->mod_date) + bin.gmtoff;
460 t = MAC_DATE_FROM_UNIX(t);
461 memcpy( head_buf + 95, &t, sizeof(t) );
462 memcpy( head_buf + 101, &fh->finder_info.fdFlags + 1, 1);
465 memcpy( head_buf + 102, "mBIN", 4);
466 *(head_buf + 106) = fh->finder_xinfo.fdScript;
467 *(head_buf + 107) = fh->finder_xinfo.fdXFlags;
468 head_buf[ 122 ] = 130;
470 head_buf[ 123 ] = 129;
472 bin.headercrc = htons( updcrc( (u_short) 0, head_buf, 124 ));
473 memcpy(head_buf + 124, &bin.headercrc, sizeof( bin.headercrc ));
475 bin.forklen[ DATA ] = ntohl( fh->forklen[ DATA ] );
476 bin.forklen[ RESOURCE ] = ntohl( fh->forklen[ RESOURCE ] );
483 fprintf( stderr, "Values written by bin_header_write\n" );
484 fprintf( stderr, "name length\t\t%d\n", head_buf[ 1 ] );
485 fprintf( stderr, "file name\t\t%s\n", (char *)&head_buf[ 2 ] );
486 fprintf( stderr, "type\t\t\t%.4s\n", (char *)&head_buf[ 65 ] );
487 fprintf( stderr, "creator\t\t\t%.4s\n", (char *)&head_buf[ 69 ] );
489 memcpy( &flags, &fh->finder_info.fdFlags, sizeof( flags ));
490 flags = ntohs( flags );
491 fprintf( stderr, "flags\t\t\t%x\n", flags );
493 /* Show fdLocation too (RLB) */
494 memcpy( &flags_long, &fh->finder_info.fdLocation,
495 sizeof( flags_long ));
496 flags_long = ntohl( flags_long );
497 fprintf( stderr, "location flags\t\t%ldx\n", flags_long );
499 fprintf( stderr, "data fork length\t%ld\n", bin.forklen[DATA] );
500 fprintf( stderr, "resource fork length\t%ld\n", bin.forklen[RESOURCE] );
501 fprintf( stderr, "\n" );
503 #endif /* DEBUG >= 5 */
505 write_ptr = (char *)head_buf;
506 wc = sizeof( head_buf );
508 while (( wc > 0 ) && ( wr >= 0 )) {
509 wr = write( bin.filed, write_ptr, wc );
514 perror( "Couldn't write macbinary header:" );
522 * test_header is called from bin_open. it checks certain values of
523 * the first 128 bytes, determines if the file is a MacBinary,
524 * MacBinary II, MacBinary III, or non-MacBinary file, and returns a
525 * one, two, three or negative one to indicate the file type.
527 * If the signature at 102 is equal to "mBIN," then it's a MacBinary
528 * III file. Bytes 0 and 74 must be zero for the file to be any type
529 * of MacBinary. If the crc of bytes 0 through 123 equals the value
530 * at offset 124 then it is a MacBinary II. If not, then if byte 82
531 * is zero, byte 2 is a valid value for a mac filename length (between
532 * one and sixty-three), and bytes 101 through 125 are all zero, then
533 * the file is a MacBinary.
535 * NOTE: apple's MacBinary II files have a non-zero value at byte 74.
536 * so, the check for byte 74 isn't very useful.
539 int test_header(void)
541 const char zeros[25] = "";
547 fprintf( stderr, "entering test_header\n" );
550 cc = read( bin.filed, (char *)head_buf, sizeof( head_buf ));
551 if ( cc < sizeof( head_buf )) {
552 perror( "Premature end of file :" );
557 fprintf( stderr, "was able to read HEADBUFSIZ bytes\n" );
560 /* check for macbinary III header */
561 if (memcmp(head_buf + 102, "mBIN", 4) == 0)
564 /* check for macbinary II even if only one of the bytes is zero */
565 if (( head_buf[ 0 ] == 0 ) || ( head_buf[ 74 ] == 0 )) {
567 fprintf( stderr, "byte 0 and 74 are both zero\n" );
569 bin.headercrc = updcrc( (u_short) 0, head_buf, 124 );
570 memcpy(&header_crc, head_buf + 124, sizeof( header_crc ));
571 header_crc = ntohs( header_crc );
572 if ( header_crc == bin.headercrc ) {
577 fprintf( stderr, "header crc didn't pan out\n" );
581 /* now see if we have a macbinary file. */
582 if ( head_buf[ 82 ] != 0 ) {
585 memcpy( &namelen, head_buf + 1, sizeof( namelen ));
587 fprintf( stderr, "name length is %d\n", namelen );
589 if (( namelen < 1 ) || ( namelen > 63 )) {
593 /* bytes 101 - 125 should be zero */
594 if (memcmp(head_buf + 101, zeros, sizeof(zeros)) != 0)
597 /* macbinary forks aren't larger than 0x7FFFFF */
598 memcpy(&cc, head_buf + 83, sizeof(cc));
602 memcpy(&cc, head_buf + 87, sizeof(cc));
609 fprintf( stderr, "byte 82 is zero and name length is cool\n" );