2 * $Id: macbin.c,v 1.15 2010-01-27 21:27:53 didg Exp $
7 #endif /* HAVE_CONFIG_H */
12 #include <sys/param.h>
21 #include <atalk/adouble.h>
22 #include <netatalk/endian.h>
27 /* This allows megatron to generate .bin files that won't choke other
28 well-known converter apps. It also makes sure that checksums
29 always match. (RLB) */
30 #define MACBINARY_PLAY_NICE_WITH_OTHERS
32 /* String used to indicate standard input instead of a disk
33 file. Should be a string not normally used for a file
44 /* Size of a macbinary file header
46 #define HEADBUFSIZ 128
48 /* Both input and output routines use this struct and the
49 following globals; therefore this module can only be used
50 for one of the two functions at a time.
52 static struct bin_file_data {
53 u_int32_t forklen[ NUMFORKS ];
54 char path[ MAXPATHLEN + 1];
57 time_t gmtoff; /* to convert from/to localtime */
60 extern char *forkname[];
61 static u_char head_buf[HEADBUFSIZ];
64 * bin_open must be called first. pass it a filename that is supposed
65 * to contain a macbinary file. an bin struct will be allocated and
66 * somewhat initialized; bin_filed is set.
69 int bin_open(char *binfile, int flags, struct FHeader *fh, int 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;
87 #endif /* ! NO_STRUCT_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(int keepflag)
145 fprintf( stderr, "entering bin_close\n" );
147 if ( keepflag == KEEP ) {
148 return( close( bin.filed ));
149 } else if ( keepflag == TRASH ) {
150 if (( strcmp( bin.path, STDIN ) != 0 ) &&
151 ( unlink( bin.path ) < 0 )) {
159 * bin_read is called until it returns zero for each fork. when it is
160 * and finds that there is zero left to give, it seeks to the position
161 * of the next fork (if there is one ).
162 * bin_read must be called enough times to
163 * return zero and no more than that.
166 ssize_t bin_read( int fork, char *buffer, size_t length)
174 fprintf( stderr, "bin_read: fork is %s\n", forkname[ fork ] );
175 fprintf( stderr, "bin_read: remaining length is %d\n", bin.forklen[fork] );
176 #endif /* DEBUG >= 3 */
178 if (bin.forklen[fork] > 0x7FFFFFFF) {
179 fprintf(stderr, "This should never happen, dude! fork length == %u\n", bin.forklen[fork]);
183 if ( bin.forklen[ fork ] == 0 ) {
184 if ( fork == DATA ) {
185 pos = lseek( bin.filed, 0, SEEK_CUR );
187 fprintf( stderr, "current position is %ld\n", pos );
191 pos = lseek( bin.filed, HEADBUFSIZ - pos, SEEK_CUR );
194 fprintf( stderr, "current position is %ld\n", pos );
200 if ( bin.forklen[ fork ] < length ) {
201 readlen = bin.forklen[ fork ];
206 fprintf( stderr, "bin_read: readlen is %d\n", readlen );
207 fprintf( stderr, "bin_read: cc is %d\n", cc );
208 #endif /* DEBUG >= 3 */
211 while (( readlen > 0 ) && ( cc > 0 )) {
212 if (( cc = read( bin.filed, buf_ptr, readlen )) > 0 ) {
214 fprintf( stderr, "bin_read: cc is %d\n", cc );
215 #endif /* DEBUG >= 3 */
221 cc = buf_ptr - buffer;
222 bin.forklen[ fork ] -= cc;
226 fprintf( stderr, "bin_read: chars read is %d\n", cc );
227 #endif /* DEBUG >= 3 */
235 ssize_t bin_write(int fork, char *buffer, size_t length)
241 u_char padchar = 0x7f;
242 /* Not sure why, but it seems this must be 0x7f to match
243 other converters, not 0. (RLB) */
246 fprintf( stderr, "bin_write: fork is %s\n", forkname[ fork ] );
247 fprintf( stderr, "bin_write: remaining length is %d\n", bin.forklen[fork] );
248 #endif /* DEBUG >= 3 */
250 if (( fork == RESOURCE ) && ( bin.forklen[ DATA ] != 0 )) {
251 fprintf( stderr, "Forklength error.\n" );
255 buf_ptr = (char *)buffer;
256 if ( bin.forklen[ fork ] >= length ) {
259 fprintf( stderr, "Forklength error.\n" );
264 fprintf( stderr, "bin_write: write length is %d\n", writelen );
265 #endif /* DEBUG >= 3 */
267 while (( writelen > 0 ) && ( cc >= 0 )) {
268 cc = write( bin.filed, buf_ptr, writelen );
273 perror( "Couldn't write to macbinary file:" );
277 bin.forklen[fork] -= length;
280 * add the padding at end of data and resource forks
283 if ( bin.forklen[ fork ] == 0 ) {
284 pos = lseek( bin.filed, 0, SEEK_CUR );
286 fprintf( stderr, "current position is %ld\n", pos );
289 if (pos != 0) { /* pad only if we need to */
290 pos = lseek( bin.filed, HEADBUFSIZ - pos - 1, SEEK_CUR );
291 if ( write( bin.filed, &padchar, 1 ) != 1 ) {
292 perror( "Couldn't write to macbinary file:" );
297 fprintf( stderr, "current position is %ld\n", pos );
302 fprintf( stderr, "\n" );
309 * bin_header_read is called by bin_open, and before any information can
310 * read from the fh substruct. it must be called before any
311 * of the bytes of the other two forks can be read, as well.
314 int bin_header_read(struct FHeader *fh, int revision)
319 * Set the appropriate finder flags mask for the type of macbinary
320 * file it is, and copy the extra macbinary II stuff from the header.
321 * If it is not a macbinary file revision of I or II, then return
325 switch ( revision ) {
328 mask = htons( 0xfcee );
329 memcpy(&fh->finder_info.fdFlags + 1, head_buf + 101,1 );
332 mask = htons( 0xfc00 );
340 * Go through and copy all the stuff you can get from the
341 * MacBinary header into the fh struct. What fun!
344 memcpy(fh->name, head_buf + 2, head_buf[ 1 ] );
345 memcpy(&fh->create_date, head_buf + 91, 4 );
346 fh->create_date = MAC_DATE_TO_UNIX(fh->create_date) - bin.gmtoff;
347 fh->create_date = AD_DATE_FROM_UNIX(fh->create_date);
348 memcpy( &fh->mod_date, head_buf + 95, 4 );
349 fh->mod_date = MAC_DATE_TO_UNIX(fh->mod_date) - bin.gmtoff;
350 fh->mod_date = AD_DATE_FROM_UNIX(fh->mod_date);
351 fh->backup_date = AD_DATE_START;
352 memcpy( &fh->finder_info, head_buf + 65, 8 );
354 #ifndef MACBINARY_PLAY_NICE_WITH_OTHERS /* (RLB) */
355 memcpy( &fh->finder_info.fdFlags, head_buf + 73, 1 );
356 fh->finder_info.fdFlags &= mask;
357 #else /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
358 memcpy( &fh->finder_info.fdFlags, head_buf + 73, 2 );
359 #endif /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
361 memcpy(&fh->finder_info.fdLocation, head_buf + 75, 4 );
362 memcpy(&fh->finder_info.fdFldr, head_buf + 79, 2 );
363 memcpy(&fh->forklen[ DATA ], head_buf + 83, 4 );
364 bin.forklen[ DATA ] = ntohl( fh->forklen[ DATA ] );
365 memcpy(&fh->forklen[ RESOURCE ], head_buf + 87, 4 );
366 bin.forklen[ RESOURCE ] = ntohl( fh->forklen[ RESOURCE ] );
367 fh->comment[0] = '\0';
370 fh->finder_xinfo.fdScript = *(head_buf + 106);
371 fh->finder_xinfo.fdXFlags = *(head_buf + 107);
379 fprintf( stderr, "Values read by bin_header_read\n" );
380 fprintf( stderr, "name length\t\t%d\n", head_buf[ 1 ] );
381 fprintf( stderr, "file name\t\t%s\n", fh->name );
382 fprintf( stderr, "get info comment\t%s\n", fh->comment );
383 fprintf( stderr, "type\t\t\t%.*s\n", sizeof( fh->finder_info.fdType ),
384 &fh->finder_info.fdType );
385 fprintf( stderr, "creator\t\t\t%.*s\n",
386 sizeof( fh->finder_info.fdCreator ),
387 &fh->finder_info.fdCreator );
388 memcpy( &flags, &fh->finder_info.fdFlags, sizeof( flags ));
389 flags = ntohs( flags );
390 fprintf( stderr, "flags\t\t\t%x\n", flags );
392 /* Show fdLocation too (RLB) */
393 memcpy( &flags_long, &fh->finder_info.fdLocation,
394 sizeof( flags_long ));
395 flags_long = ntohl( flags_long );
396 fprintf( stderr, "location flags\t\t%lx\n", flags_long );
398 fprintf( stderr, "data fork length\t%ld\n", bin.forklen[DATA] );
399 fprintf( stderr, "resource fork length\t%ld\n", bin.forklen[RESOURCE] );
400 fprintf( stderr, "\n" );
402 #endif /* DEBUG >= 5 */
408 * bin_header_write is called by bin_open, and relies on information
409 * from the fh substruct. it must be called before any
410 * of the bytes of the other two forks can be written, as well.
411 * bin_header_write and bin_header_read are opposites.
414 int bin_header_write(struct FHeader *fh)
421 memset(head_buf, 0, sizeof( head_buf ));
422 head_buf[ 1 ] = (u_char)strlen( fh->name );
423 memcpy( head_buf + 2, fh->name, head_buf[ 1 ] );
424 memcpy( head_buf + 65, &fh->finder_info, 8 );
426 #ifndef MACBINARY_PLAY_NICE_WITH_OTHERS /* (RLB) */
427 memcpy( head_buf + 73, &fh->finder_info.fdFlags, 1 );
428 #else /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
429 memcpy( head_buf + 73, &fh->finder_info.fdFlags, 2 );
430 #endif /* ! MACBINARY_PLAY_NICE_WITH_OTHERS */
432 memcpy( head_buf + 75, &fh->finder_info.fdLocation, 4 );
433 memcpy( head_buf + 79, &fh->finder_info.fdFldr, 2 );
434 memcpy( head_buf + 83, &fh->forklen[ DATA ], 4 );
435 memcpy( head_buf + 87, &fh->forklen[ RESOURCE ], 4 );
436 t = AD_DATE_TO_UNIX(fh->create_date) + bin.gmtoff;
437 t = MAC_DATE_FROM_UNIX(t);
438 memcpy( head_buf + 91, &t, sizeof(t) );
439 t = AD_DATE_TO_UNIX(fh->mod_date) + bin.gmtoff;
440 t = MAC_DATE_FROM_UNIX(t);
441 memcpy( head_buf + 95, &t, sizeof(t) );
442 memcpy( head_buf + 101, &fh->finder_info.fdFlags + 1, 1);
445 memcpy( head_buf + 102, "mBIN", 4);
446 *(head_buf + 106) = fh->finder_xinfo.fdScript;
447 *(head_buf + 107) = fh->finder_xinfo.fdXFlags;
448 head_buf[ 122 ] = 130;
450 head_buf[ 123 ] = 129;
452 bin.headercrc = htons( updcrc( (u_short) 0, head_buf, 124 ));
453 memcpy(head_buf + 124, &bin.headercrc, sizeof( bin.headercrc ));
455 bin.forklen[ DATA ] = ntohl( fh->forklen[ DATA ] );
456 bin.forklen[ RESOURCE ] = ntohl( fh->forklen[ RESOURCE ] );
463 fprintf( stderr, "Values written by bin_header_write\n" );
464 fprintf( stderr, "name length\t\t%d\n", head_buf[ 1 ] );
465 fprintf( stderr, "file name\t\t%s\n", (char *)&head_buf[ 2 ] );
466 fprintf( stderr, "type\t\t\t%.4s\n", (char *)&head_buf[ 65 ] );
467 fprintf( stderr, "creator\t\t\t%.4s\n", (char *)&head_buf[ 69 ] );
469 memcpy( &flags, &fh->finder_info.fdFlags, sizeof( flags ));
470 flags = ntohs( flags );
471 fprintf( stderr, "flags\t\t\t%x\n", flags );
473 /* Show fdLocation too (RLB) */
474 memcpy( &flags_long, &fh->finder_info.fdLocation,
475 sizeof( flags_long ));
476 flags_long = ntohl( flags_long );
477 fprintf( stderr, "location flags\t\t%ldx\n", flags_long );
479 fprintf( stderr, "data fork length\t%ld\n", bin.forklen[DATA] );
480 fprintf( stderr, "resource fork length\t%ld\n", bin.forklen[RESOURCE] );
481 fprintf( stderr, "\n" );
483 #endif /* DEBUG >= 5 */
485 write_ptr = (char *)head_buf;
486 wc = sizeof( head_buf );
488 while (( wc > 0 ) && ( wr >= 0 )) {
489 wr = write( bin.filed, write_ptr, wc );
494 perror( "Couldn't write macbinary header:" );
502 * test_header is called from bin_open. it checks certain values of
503 * the first 128 bytes, determines if the file is a MacBinary,
504 * MacBinary II, MacBinary III, or non-MacBinary file, and returns a
505 * one, two, three or negative one to indicate the file type.
507 * If the signature at 102 is equal to "mBIN," then it's a MacBinary
508 * III file. Bytes 0 and 74 must be zero for the file to be any type
509 * of MacBinary. If the crc of bytes 0 through 123 equals the value
510 * at offset 124 then it is a MacBinary II. If not, then if byte 82
511 * is zero, byte 2 is a valid value for a mac filename length (between
512 * one and sixty-three), and bytes 101 through 125 are all zero, then
513 * the file is a MacBinary.
515 * NOTE: apple's MacBinary II files have a non-zero value at byte 74.
516 * so, the check for byte 74 isn't very useful.
519 int test_header(void)
521 const char zeros[25] = "";
527 fprintf( stderr, "entering test_header\n" );
530 cc = read( bin.filed, (char *)head_buf, sizeof( head_buf ));
531 if ( cc < sizeof( head_buf )) {
532 perror( "Premature end of file :" );
537 fprintf( stderr, "was able to read HEADBUFSIZ bytes\n" );
540 /* check for macbinary III header */
541 if (memcmp(head_buf + 102, "mBIN", 4) == 0)
544 /* check for macbinary II even if only one of the bytes is zero */
545 if (( head_buf[ 0 ] == 0 ) || ( head_buf[ 74 ] == 0 )) {
547 fprintf( stderr, "byte 0 and 74 are both zero\n" );
549 bin.headercrc = updcrc( (u_short) 0, head_buf, 124 );
550 memcpy(&header_crc, head_buf + 124, sizeof( header_crc ));
551 header_crc = ntohs( header_crc );
552 if ( header_crc == bin.headercrc ) {
557 fprintf( stderr, "header crc didn't pan out\n" );
561 /* now see if we have a macbinary file. */
562 if ( head_buf[ 82 ] != 0 ) {
565 memcpy( &namelen, head_buf + 1, sizeof( namelen ));
567 fprintf( stderr, "name length is %d\n", namelen );
569 if (( namelen < 1 ) || ( namelen > 63 )) {
573 /* bytes 101 - 125 should be zero */
574 if (memcmp(head_buf + 101, zeros, sizeof(zeros)) != 0)
577 /* macbinary forks aren't larger than 0x7FFFFF */
578 /* we allow forks to be larger, breaking the specs */
579 memcpy(&cc, head_buf + 83, sizeof(cc));
583 memcpy(&cc, head_buf + 87, sizeof(cc));
590 fprintf( stderr, "byte 82 is zero and name length is cool\n" );