1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % U U TTTTT IIIII L IIIII TTTTT Y Y %
7 % U U T I L I T Y Y %
8 % U U T I L I T Y %
9 % U U T I L I T Y %
10 % UUU T IIIII LLLLL IIIII T Y %
11 % %
12 % %
13 % MagickCore Utility Methods %
14 % %
15 % Software Design %
16 % Cristy %
17 % January 1993 %
18 % %
19 % %
20 % Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
22 % %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
25 % %
26 % https://imagemagick.org/script/license.php %
27 % %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
33 % %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35 %
36 %
37 */
38
39 /*
40 Include declarations.
41 */
42 #include "MagickCore/studio.h"
43 #include "MagickCore/property.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/color.h"
46 #include "MagickCore/exception.h"
47 #include "MagickCore/exception-private.h"
48 #include "MagickCore/geometry.h"
49 #include "MagickCore/image-private.h"
50 #include "MagickCore/list.h"
51 #include "MagickCore/log.h"
52 #include "MagickCore/magick-private.h"
53 #include "MagickCore/memory_.h"
54 #include "MagickCore/nt-base-private.h"
55 #include "MagickCore/option.h"
56 #include "MagickCore/policy.h"
57 #include "MagickCore/random_.h"
58 #include "MagickCore/registry.h"
59 #include "MagickCore/resource_.h"
60 #include "MagickCore/semaphore.h"
61 #include "MagickCore/signature-private.h"
62 #include "MagickCore/statistic.h"
63 #include "MagickCore/string_.h"
64 #include "MagickCore/string-private.h"
65 #include "MagickCore/token.h"
66 #include "MagickCore/token-private.h"
67 #include "MagickCore/utility.h"
68 #include "MagickCore/utility-private.h"
69 #if defined(MAGICKCORE_HAVE_PROCESS_H)
70 #include <process.h>
71 #endif
72 #if defined(MAGICKCORE_HAVE_MACH_O_DYLD_H)
73 #include <mach-o/dyld.h>
74 #endif
75
76 /*
77 Static declarations.
78 */
79 static const char
80 Base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
81
82 /*
83 Forward declaration.
84 */
85 static int
86 IsPathDirectory(const char *);
87
88 /*
89 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
90 % %
91 % %
92 % %
93 % A c q u i r e U n i q u e F i l e n a m e %
94 % %
95 % %
96 % %
97 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
98 %
99 % AcquireUniqueFilename() replaces the contents of path by a unique path name.
100 %
101 % The format of the AcquireUniqueFilename method is:
102 %
103 % MagickBooleanType AcquireUniqueFilename(char *path)
104 %
105 % A description of each parameter follows.
106 %
107 % o path: Specifies a pointer to an array of characters. The unique path
108 % name is returned in this array.
109 %
110 */
AcquireUniqueFilename(char * path)111 MagickExport MagickBooleanType AcquireUniqueFilename(char *path)
112 {
113 int
114 file;
115
116 file=AcquireUniqueFileResource(path);
117 if (file == -1)
118 return(MagickFalse);
119 file=close(file)-1;
120 return(MagickTrue);
121 }
122
123 /*
124 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
125 % %
126 % %
127 % %
128 % A c q u i r e U n i q u e S ym b o l i c L i n k %
129 % %
130 % %
131 % %
132 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
133 %
134 % AcquireUniqueSymbolicLink() creates a unique symbolic link to the specified
135 % source path and returns MagickTrue on success otherwise MagickFalse. If the
136 % symlink() method fails or is not available, a unique file name is generated
137 % and the source file copied to it. When you are finished with the file, use
138 % RelinquishUniqueFilename() to destroy it.
139 %
140 % The format of the AcquireUniqueSymbolicLink method is:
141 %
142 % MagickBooleanType AcquireUniqueSymbolicLink(const char *source,
143 % char destination)
144 %
145 % A description of each parameter follows.
146 %
147 % o source: the source path.
148 %
149 % o destination: the destination path.
150 %
151 */
152
AcquireUniqueSymbolicLink(const char * source,char * destination)153 MagickExport MagickBooleanType AcquireUniqueSymbolicLink(const char *source,
154 char *destination)
155 {
156 int
157 destination_file,
158 source_file;
159
160 MagickBooleanType
161 status;
162
163 size_t
164 length,
165 quantum;
166
167 ssize_t
168 count;
169
170 struct stat
171 attributes;
172
173 unsigned char
174 *buffer;
175
176 assert(source != (const char *) NULL);
177 assert(destination != (char *) NULL);
178 #if defined(MAGICKCORE_HAVE_SYMLINK)
179 {
180 char
181 *passes;
182
183 (void) AcquireUniqueFilename(destination);
184 (void) RelinquishUniqueFileResource(destination);
185 passes=GetPolicyValue("system:shred");
186 if (passes != (char *) NULL)
187 passes=DestroyString(passes);
188 else
189 {
190 if (*source == *DirectorySeparator)
191 {
192 if (symlink(source,destination) == 0)
193 return(MagickTrue);
194 }
195 else
196 {
197 char
198 path[MagickPathExtent];
199
200 *path='\0';
201 if (getcwd(path,MagickPathExtent) == (char *) NULL)
202 return(MagickFalse);
203 (void) ConcatenateMagickString(path,DirectorySeparator,
204 MagickPathExtent);
205 (void) ConcatenateMagickString(path,source,MagickPathExtent);
206 if (symlink(path,destination) == 0)
207 return(MagickTrue);
208 }
209 }
210 }
211 #endif
212 destination_file=AcquireUniqueFileResource(destination);
213 if (destination_file == -1)
214 return(MagickFalse);
215 source_file=open_utf8(source,O_RDONLY | O_BINARY,0);
216 if (source_file == -1)
217 {
218 (void) close(destination_file);
219 (void) RelinquishUniqueFileResource(destination);
220 return(MagickFalse);
221 }
222 quantum=(size_t) MagickMaxBufferExtent;
223 if ((fstat(source_file,&attributes) == 0) && (attributes.st_size > 0))
224 quantum=(size_t) MagickMin(attributes.st_size,MagickMaxBufferExtent);
225 buffer=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*buffer));
226 if (buffer == (unsigned char *) NULL)
227 {
228 (void) close(source_file);
229 (void) close(destination_file);
230 (void) RelinquishUniqueFileResource(destination);
231 return(MagickFalse);
232 }
233 status=MagickTrue;
234 for (length=0; ; )
235 {
236 count=(ssize_t) read(source_file,buffer,quantum);
237 if (count <= 0)
238 break;
239 length=(size_t) count;
240 count=(ssize_t) write(destination_file,buffer,length);
241 if ((size_t) count != length)
242 {
243 (void) RelinquishUniqueFileResource(destination);
244 status=MagickFalse;
245 break;
246 }
247 }
248 (void) close(destination_file);
249 (void) close(source_file);
250 buffer=(unsigned char *) RelinquishMagickMemory(buffer);
251 return(status);
252 }
253
254 /*
255 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
256 % %
257 % %
258 % %
259 % A p p e n d I m a g e F o r m a t %
260 % %
261 % %
262 % %
263 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
264 %
265 % AppendImageFormat() appends the image format type to the filename. If an
266 % extension to the file already exists, it is first removed.
267 %
268 % The format of the AppendImageFormat method is:
269 %
270 % void AppendImageFormat(const char *format,char *filename)
271 %
272 % A description of each parameter follows.
273 %
274 % o format: Specifies a pointer to an array of characters. This the
275 % format of the image.
276 %
277 % o filename: Specifies a pointer to an array of characters. The unique
278 % file name is returned in this array.
279 %
280 */
AppendImageFormat(const char * format,char * filename)281 MagickExport void AppendImageFormat(const char *format,char *filename)
282 {
283 char
284 extension[MagickPathExtent],
285 root[MagickPathExtent];
286
287 assert(format != (char *) NULL);
288 assert(filename != (char *) NULL);
289 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
290 if ((*format == '\0') || (*filename == '\0'))
291 return;
292 if (LocaleCompare(filename,"-") == 0)
293 {
294 char
295 message[MagickPathExtent];
296
297 (void) FormatLocaleString(message,MagickPathExtent,"%s:%s",format,
298 filename);
299 (void) CopyMagickString(filename,message,MagickPathExtent);
300 return;
301 }
302 GetPathComponent(filename,ExtensionPath,extension);
303 if ((LocaleCompare(extension,"Z") == 0) ||
304 (LocaleCompare(extension,"bz2") == 0) ||
305 (LocaleCompare(extension,"gz") == 0) ||
306 (LocaleCompare(extension,"wmz") == 0) ||
307 (LocaleCompare(extension,"svgz") == 0))
308 {
309 GetPathComponent(filename,RootPath,root);
310 (void) CopyMagickString(filename,root,MagickPathExtent);
311 GetPathComponent(filename,RootPath,root);
312 (void) FormatLocaleString(filename,MagickPathExtent,"%s.%s.%s",root,
313 format,extension);
314 return;
315 }
316 GetPathComponent(filename,RootPath,root);
317 (void) FormatLocaleString(filename,MagickPathExtent,"%s.%s",root,format);
318 }
319
320 /*
321 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
322 % %
323 % %
324 % %
325 % B a s e 6 4 D e c o d e %
326 % %
327 % %
328 % %
329 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
330 %
331 % Base64Decode() decodes Base64-encoded text and returns its binary
332 % equivalent. NULL is returned if the text is not valid Base64 data, or a
333 % memory allocation failure occurs.
334 %
335 % The format of the Base64Decode method is:
336 %
337 % unsigned char *Base64Decode(const char *source,length_t *length)
338 %
339 % A description of each parameter follows:
340 %
341 % o source: A pointer to a Base64-encoded string.
342 %
343 % o length: the number of bytes decoded.
344 %
345 */
Base64Decode(const char * source,size_t * length)346 MagickExport unsigned char *Base64Decode(const char *source,size_t *length)
347 {
348 int
349 state;
350
351 register const char
352 *p,
353 *q;
354
355 register size_t
356 i;
357
358 unsigned char
359 *decode;
360
361 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
362 assert(source != (char *) NULL);
363 assert(length != (size_t *) NULL);
364 *length=0;
365 decode=(unsigned char *) AcquireQuantumMemory((strlen(source)+3)/4,
366 3*sizeof(*decode));
367 if (decode == (unsigned char *) NULL)
368 return((unsigned char *) NULL);
369 i=0;
370 state=0;
371 for (p=source; *p != '\0'; p++)
372 {
373 if (isspace((int) ((unsigned char) *p)) != 0)
374 continue;
375 if (*p == '=')
376 break;
377 q=strchr(Base64,*p);
378 if (q == (char *) NULL)
379 {
380 decode=(unsigned char *) RelinquishMagickMemory(decode);
381 return((unsigned char *) NULL); /* non-Base64 character */
382 }
383 switch (state)
384 {
385 case 0:
386 {
387 decode[i]=(q-Base64) << 2;
388 state++;
389 break;
390 }
391 case 1:
392 {
393 decode[i++]|=(q-Base64) >> 4;
394 decode[i]=((q-Base64) & 0x0f) << 4;
395 state++;
396 break;
397 }
398 case 2:
399 {
400 decode[i++]|=(q-Base64) >> 2;
401 decode[i]=((q-Base64) & 0x03) << 6;
402 state++;
403 break;
404 }
405 case 3:
406 {
407 decode[i++]|=(q-Base64);
408 state=0;
409 break;
410 }
411 }
412 }
413 /*
414 Verify Base-64 string has proper terminal characters.
415 */
416 if (*p != '=')
417 {
418 if (state != 0)
419 {
420 decode=(unsigned char *) RelinquishMagickMemory(decode);
421 return((unsigned char *) NULL);
422 }
423 }
424 else
425 {
426 p++;
427 switch (state)
428 {
429 case 0:
430 case 1:
431 {
432 /*
433 Unrecognized '=' character.
434 */
435 decode=(unsigned char *) RelinquishMagickMemory(decode);
436 return((unsigned char *) NULL);
437 }
438 case 2:
439 {
440 for ( ; *p != '\0'; p++)
441 if (isspace((int) ((unsigned char) *p)) == 0)
442 break;
443 if (*p != '=')
444 {
445 decode=(unsigned char *) RelinquishMagickMemory(decode);
446 return((unsigned char *) NULL);
447 }
448 p++;
449 }
450 case 3:
451 {
452 for ( ; *p != '\0'; p++)
453 if (isspace((int) ((unsigned char) *p)) == 0)
454 {
455 decode=(unsigned char *) RelinquishMagickMemory(decode);
456 return((unsigned char *) NULL);
457 }
458 if ((int) decode[i] != 0)
459 {
460 decode=(unsigned char *) RelinquishMagickMemory(decode);
461 return((unsigned char *) NULL);
462 }
463 break;
464 }
465 }
466 }
467 *length=i;
468 return(decode);
469 }
470
471 /*
472 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
473 % %
474 % %
475 % %
476 % B a s e 6 4 E n c o d e %
477 % %
478 % %
479 % %
480 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
481 %
482 % Base64Encode() encodes arbitrary binary data to Base64 encoded format as
483 % described by the "Base64 Content-Transfer-Encoding" section of RFC 2045 and
484 % returns the result as a null-terminated ASCII string. NULL is returned if
485 % a memory allocation failure occurs.
486 %
487 % The format of the Base64Encode method is:
488 %
489 % char *Base64Encode(const unsigned char *blob,const size_t blob_length,
490 % size_t *encode_length)
491 %
492 % A description of each parameter follows:
493 %
494 % o blob: A pointer to binary data to encode.
495 %
496 % o blob_length: the number of bytes to encode.
497 %
498 % o encode_length: The number of bytes encoded.
499 %
500 */
Base64Encode(const unsigned char * blob,const size_t blob_length,size_t * encode_length)501 MagickExport char *Base64Encode(const unsigned char *blob,
502 const size_t blob_length,size_t *encode_length)
503 {
504 char
505 *encode;
506
507 register const unsigned char
508 *p;
509
510 register size_t
511 i;
512
513 size_t
514 remainder;
515
516 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
517 assert(blob != (const unsigned char *) NULL);
518 assert(blob_length != 0);
519 assert(encode_length != (size_t *) NULL);
520 *encode_length=0;
521 encode=(char *) AcquireQuantumMemory(blob_length/3+4,4*sizeof(*encode));
522 if (encode == (char *) NULL)
523 return((char *) NULL);
524 i=0;
525 for (p=blob; p < (blob+blob_length-2); p+=3)
526 {
527 encode[i++]=Base64[(int) (*p >> 2)];
528 encode[i++]=Base64[(int) (((*p & 0x03) << 4)+(*(p+1) >> 4))];
529 encode[i++]=Base64[(int) (((*(p+1) & 0x0f) << 2)+(*(p+2) >> 6))];
530 encode[i++]=Base64[(int) (*(p+2) & 0x3f)];
531 }
532 remainder=blob_length % 3;
533 if (remainder != 0)
534 {
535 ssize_t
536 j;
537
538 unsigned char
539 code[3];
540
541 code[0]='\0';
542 code[1]='\0';
543 code[2]='\0';
544 for (j=0; j < (ssize_t) remainder; j++)
545 code[j]=(*p++);
546 encode[i++]=Base64[(int) (code[0] >> 2)];
547 encode[i++]=Base64[(int) (((code[0] & 0x03) << 4)+(code[1] >> 4))];
548 if (remainder == 1)
549 encode[i++]='=';
550 else
551 encode[i++]=Base64[(int) (((code[1] & 0x0f) << 2)+(code[2] >> 6))];
552 encode[i++]='=';
553 }
554 *encode_length=i;
555 encode[i++]='\0';
556 return(encode);
557 }
558
559 /*
560 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
561 % %
562 % %
563 % %
564 % C h o p P a t h C o m p o n e n t s %
565 % %
566 % %
567 % %
568 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
569 %
570 % ChopPathComponents() removes the number of specified file components from a
571 % path.
572 %
573 % The format of the ChopPathComponents method is:
574 %
575 % ChopPathComponents(char *path,size_t components)
576 %
577 % A description of each parameter follows:
578 %
579 % o path: The path.
580 %
581 % o components: The number of components to chop.
582 %
583 */
ChopPathComponents(char * path,const size_t components)584 MagickPrivate void ChopPathComponents(char *path,const size_t components)
585 {
586 register ssize_t
587 i;
588
589 for (i=0; i < (ssize_t) components; i++)
590 GetPathComponent(path,HeadPath,path);
591 }
592
593 /*
594 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
595 % %
596 % %
597 % %
598 % E x p a n d F i l e n a m e %
599 % %
600 % %
601 % %
602 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
603 %
604 % ExpandFilename() expands '~' in a path.
605 %
606 % The format of the ExpandFilename function is:
607 %
608 % ExpandFilename(char *path)
609 %
610 % A description of each parameter follows:
611 %
612 % o path: Specifies a pointer to a character array that contains the
613 % path.
614 %
615 */
ExpandFilename(char * path)616 MagickPrivate void ExpandFilename(char *path)
617 {
618 char
619 expand_path[MagickPathExtent];
620
621 if (path == (char *) NULL)
622 return;
623 if (*path != '~')
624 return;
625 (void) CopyMagickString(expand_path,path,MagickPathExtent);
626 if ((*(path+1) == *DirectorySeparator) || (*(path+1) == '\0'))
627 {
628 char
629 *home;
630
631 /*
632 Substitute ~ with $HOME.
633 */
634 (void) CopyMagickString(expand_path,".",MagickPathExtent);
635 (void) ConcatenateMagickString(expand_path,path+1,MagickPathExtent);
636 home=GetEnvironmentValue("HOME");
637 if (home == (char *) NULL)
638 home=GetEnvironmentValue("USERPROFILE");
639 if (home != (char *) NULL)
640 {
641 (void) CopyMagickString(expand_path,home,MagickPathExtent);
642 (void) ConcatenateMagickString(expand_path,path+1,MagickPathExtent);
643 home=DestroyString(home);
644 }
645 }
646 else
647 {
648 #if defined(MAGICKCORE_POSIX_SUPPORT) && !defined(__OS2__)
649 char
650 username[MagickPathExtent];
651
652 register char
653 *p;
654
655 struct passwd
656 *entry;
657
658 /*
659 Substitute ~ with home directory from password file.
660 */
661 (void) CopyMagickString(username,path+1,MagickPathExtent);
662 p=strchr(username,'/');
663 if (p != (char *) NULL)
664 *p='\0';
665 entry=getpwnam(username);
666 if (entry == (struct passwd *) NULL)
667 return;
668 (void) CopyMagickString(expand_path,entry->pw_dir,MagickPathExtent);
669 if (p != (char *) NULL)
670 {
671 (void) ConcatenateMagickString(expand_path,"/",MagickPathExtent);
672 (void) ConcatenateMagickString(expand_path,p+1,MagickPathExtent);
673 }
674 #endif
675 }
676 (void) CopyMagickString(path,expand_path,MagickPathExtent);
677 }
678
679 /*
680 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
681 % %
682 % %
683 % %
684 % E x p a n d F i l e n a m e s %
685 % %
686 % %
687 % %
688 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
689 %
690 % ExpandFilenames() checks each argument of the given argument array, and
691 % expands it if they have a wildcard character.
692 %
693 % Any coder prefix (EG: 'coder:filename') or read modifier postfix (EG:
694 % 'filename[...]') are ignored during the file the expansion, but will be
695 % included in the final argument. If no filename matching the meta-character
696 % 'glob' is found the original argument is returned.
697 %
698 % For example, an argument of '*.gif[20x20]' will be replaced by the list
699 % 'abc.gif[20x20]', 'foobar.gif[20x20]', 'xyzzy.gif[20x20]'
700 % if such filenames exist, (in the current directory in this case).
701 %
702 % Meta-characters handled...
703 % @ read a list of filenames (no further expansion performed)
704 % ~ At start of filename expands to HOME environemtn variable
705 % * matches any string including an empty string
706 % ? matches by any single character
707 %
708 % WARNING: filenames starting with '.' (hidden files in a UNIX file system)
709 % will never be expanded. Attempting to epand '.*' will produce no change.
710 %
711 % Expansion is ignored for coders "label:" "caption:" "pango:" and "vid:".
712 % Which provide their own '@' meta-character handling.
713 %
714 % You can see the results of the expansion using "Configure" log events.
715 %
716 % The returned list should be freed using DestroyStringList().
717 %
718 % However the strings in the original pointed to argv are not
719 % freed (TO BE CHECKED). So a copy of the original pointer (and count)
720 % should be kept separate if they need to be freed later.
721 %
722 % The format of the ExpandFilenames function is:
723 %
724 % status=ExpandFilenames(int *number_arguments,char ***arguments)
725 %
726 % A description of each parameter follows:
727 %
728 % o number_arguments: Specifies a pointer to an integer describing the
729 % number of elements in the argument vector.
730 %
731 % o arguments: Specifies a pointer to a text array containing the command
732 % line arguments.
733 %
734 */
ExpandFilenames(int * number_arguments,char *** arguments)735 MagickExport MagickBooleanType ExpandFilenames(int *number_arguments,
736 char ***arguments)
737 {
738 char
739 home_directory[MagickPathExtent],
740 **vector;
741
742 register ssize_t
743 i,
744 j;
745
746 size_t
747 number_files;
748
749 ssize_t
750 count,
751 parameters;
752
753 /*
754 Allocate argument vector.
755 */
756 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
757 assert(number_arguments != (int *) NULL);
758 assert(arguments != (char ***) NULL);
759 vector=(char **) AcquireQuantumMemory((size_t) (*number_arguments+1),
760 sizeof(*vector));
761 if (vector == (char **) NULL)
762 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
763 /*
764 Expand any wildcard filenames.
765 */
766 *home_directory='\0';
767 count=0;
768 for (i=0; i < (ssize_t) *number_arguments; i++)
769 {
770 char
771 **filelist,
772 filename[MagickPathExtent],
773 magick[MagickPathExtent],
774 *option,
775 path[MagickPathExtent],
776 subimage[MagickPathExtent];
777
778 MagickBooleanType
779 destroy;
780
781 option=(*arguments)[i];
782 *magick='\0';
783 *path='\0';
784 *filename='\0';
785 *subimage='\0';
786 number_files=0;
787 vector[count++]=ConstantString(option);
788 destroy=MagickTrue;
789 parameters=ParseCommandOption(MagickCommandOptions,MagickFalse,option);
790 if (parameters > 0)
791 {
792 /*
793 Do not expand command option parameters.
794 */
795 for (j=0; j < parameters; j++)
796 {
797 i++;
798 if (i == (ssize_t) *number_arguments)
799 break;
800 option=(*arguments)[i];
801 vector[count++]=ConstantString(option);
802 }
803 continue;
804 }
805 if ((*option == '"') || (*option == '\''))
806 continue;
807 GetPathComponent(option,TailPath,filename);
808 GetPathComponent(option,MagickPath,magick);
809 if ((LocaleCompare(magick,"CAPTION") == 0) ||
810 (LocaleCompare(magick,"LABEL") == 0) ||
811 (LocaleCompare(magick,"PANGO") == 0) ||
812 (LocaleCompare(magick,"VID") == 0))
813 continue;
814 if ((IsGlob(filename) == MagickFalse) && (*option != '@'))
815 continue;
816 if (*option != '@')
817 {
818 /*
819 Generate file list from wildcard filename (e.g. *.jpg).
820 */
821 GetPathComponent(option,HeadPath,path);
822 GetPathComponent(option,SubimagePath,subimage);
823 ExpandFilename(path);
824 if (*home_directory == '\0')
825 getcwd_utf8(home_directory,MagickPathExtent-1);
826 filelist=ListFiles(*path == '\0' ? home_directory : path,filename,
827 &number_files);
828 }
829 else
830 {
831 char
832 *files;
833
834 ExceptionInfo
835 *exception;
836
837 int
838 length;
839
840 /*
841 Generate file list from file list (e.g. @filelist.txt).
842 */
843 exception=AcquireExceptionInfo();
844 files=FileToString(option+1,~0UL,exception);
845 exception=DestroyExceptionInfo(exception);
846 if (files == (char *) NULL)
847 continue;
848 filelist=StringToArgv(files,&length);
849 if (filelist == (char **) NULL)
850 continue;
851 files=DestroyString(files);
852 filelist[0]=DestroyString(filelist[0]);
853 for (j=0; j < (ssize_t) (length-1); j++)
854 filelist[j]=filelist[j+1];
855 number_files=(size_t) length-1;
856 }
857 if (filelist == (char **) NULL)
858 continue;
859 for (j=0; j < (ssize_t) number_files; j++)
860 if (IsPathDirectory(filelist[j]) <= 0)
861 break;
862 if (j == (ssize_t) number_files)
863 {
864 for (j=0; j < (ssize_t) number_files; j++)
865 filelist[j]=DestroyString(filelist[j]);
866 filelist=(char **) RelinquishMagickMemory(filelist);
867 continue;
868 }
869 /*
870 Transfer file list to argument vector.
871 */
872 vector=(char **) ResizeQuantumMemory(vector,(size_t) *number_arguments+
873 count+number_files+1,sizeof(*vector));
874 if (vector == (char **) NULL)
875 {
876 for (j=0; j < (ssize_t) number_files; j++)
877 filelist[j]=DestroyString(filelist[j]);
878 filelist=(char **) RelinquishMagickMemory(filelist);
879 return(MagickFalse);
880 }
881 for (j=0; j < (ssize_t) number_files; j++)
882 {
883 option=filelist[j];
884 parameters=ParseCommandOption(MagickCommandOptions,MagickFalse,option);
885 if (parameters > 0)
886 {
887 ssize_t
888 k;
889
890 /*
891 Do not expand command option parameters.
892 */
893 vector[count++]=ConstantString(option);
894 for (k=0; k < parameters; k++)
895 {
896 j++;
897 if (j == (ssize_t) number_files)
898 break;
899 option=filelist[j];
900 vector[count++]=ConstantString(option);
901 }
902 continue;
903 }
904 (void) CopyMagickString(filename,path,MagickPathExtent);
905 if (*path != '\0')
906 (void) ConcatenateMagickString(filename,DirectorySeparator,
907 MagickPathExtent);
908 if (filelist[j] != (char *) NULL)
909 (void) ConcatenateMagickString(filename,filelist[j],MagickPathExtent);
910 filelist[j]=DestroyString(filelist[j]);
911 if (strlen(filename) >= (MagickPathExtent-1))
912 ThrowFatalException(OptionFatalError,"FilenameTruncated");
913 if (IsPathDirectory(filename) <= 0)
914 {
915 char
916 file_path[MagickPathExtent];
917
918 *file_path='\0';
919 if (*magick != '\0')
920 {
921 (void) ConcatenateMagickString(file_path,magick,
922 MagickPathExtent);
923 (void) ConcatenateMagickString(file_path,":",MagickPathExtent);
924 }
925 (void) ConcatenateMagickString(file_path,filename,MagickPathExtent);
926 if (*subimage != '\0')
927 {
928 (void) ConcatenateMagickString(file_path,"[",MagickPathExtent);
929 (void) ConcatenateMagickString(file_path,subimage,
930 MagickPathExtent);
931 (void) ConcatenateMagickString(file_path,"]",MagickPathExtent);
932 }
933 if (strlen(file_path) >= (MagickPathExtent-1))
934 ThrowFatalException(OptionFatalError,"FilenameTruncated");
935 if (destroy != MagickFalse)
936 {
937 count--;
938 vector[count]=DestroyString(vector[count]);
939 destroy=MagickFalse;
940 }
941 vector[count++]=ConstantString(file_path);
942 }
943 }
944 filelist=(char **) RelinquishMagickMemory(filelist);
945 }
946 vector[count]=(char *) NULL;
947 if (IsEventLogging() != MagickFalse)
948 {
949 char
950 *command_line;
951
952 command_line=AcquireString(vector[0]);
953 for (i=1; i < count; i++)
954 {
955 (void) ConcatenateString(&command_line," {");
956 (void) ConcatenateString(&command_line,vector[i]);
957 (void) ConcatenateString(&command_line,"}");
958 }
959 (void) LogMagickEvent(ConfigureEvent,GetMagickModule(),
960 "Command line: %s",command_line);
961 command_line=DestroyString(command_line);
962 }
963 *number_arguments=(int) count;
964 *arguments=vector;
965 return(MagickTrue);
966 }
967
968 /*
969 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
970 % %
971 % %
972 % %
973 % G e t E x e c u t i o n P a t h %
974 % %
975 % %
976 % %
977 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
978 %
979 % GetExecutionPath() returns the pathname of the executable that started
980 % the process. On success MagickTrue is returned, otherwise MagickFalse.
981 %
982 % The format of the GetExecutionPath method is:
983 %
984 % MagickBooleanType GetExecutionPath(char *path,const size_t extent)
985 %
986 % A description of each parameter follows:
987 %
988 % o path: the pathname of the executable that started the process.
989 %
990 % o extent: the maximum extent of the path.
991 %
992 */
GetExecutionPath(char * path,const size_t extent)993 MagickPrivate MagickBooleanType GetExecutionPath(char *path,const size_t extent)
994 {
995 char
996 *directory;
997
998 *path='\0';
999 directory=getcwd(path,(unsigned long) extent);
1000 (void) directory;
1001 #if defined(MAGICKCORE_HAVE_GETPID) && defined(MAGICKCORE_HAVE_READLINK) && defined(PATH_MAX)
1002 {
1003 char
1004 execution_path[PATH_MAX+1],
1005 link_path[MagickPathExtent];
1006
1007 ssize_t
1008 count;
1009
1010 (void) FormatLocaleString(link_path,MagickPathExtent,"/proc/%.20g/exe",
1011 (double) getpid());
1012 count=readlink(link_path,execution_path,PATH_MAX);
1013 if (count == -1)
1014 {
1015 (void) FormatLocaleString(link_path,MagickPathExtent,"/proc/%.20g/file",
1016 (double) getpid());
1017 count=readlink(link_path,execution_path,PATH_MAX);
1018 }
1019 if ((count > 0) && (count <= (ssize_t) PATH_MAX))
1020 {
1021 execution_path[count]='\0';
1022 (void) CopyMagickString(path,execution_path,extent);
1023 }
1024 }
1025 #endif
1026 #if defined(MAGICKCORE_HAVE__NSGETEXECUTABLEPATH)
1027 {
1028 char
1029 executable_path[PATH_MAX << 1],
1030 execution_path[PATH_MAX+1];
1031
1032 uint32_t
1033 length;
1034
1035 length=sizeof(executable_path);
1036 if ((_NSGetExecutablePath(executable_path,&length) == 0) &&
1037 (realpath(executable_path,execution_path) != (char *) NULL))
1038 (void) CopyMagickString(path,execution_path,extent);
1039 }
1040 #endif
1041 #if defined(MAGICKCORE_HAVE_GETEXECNAME)
1042 {
1043 const char
1044 *execution_path;
1045
1046 execution_path=(const char *) getexecname();
1047 if (execution_path != (const char *) NULL)
1048 {
1049 if (*execution_path != *DirectorySeparator)
1050 (void) ConcatenateMagickString(path,DirectorySeparator,extent);
1051 (void) ConcatenateMagickString(path,execution_path,extent);
1052 }
1053 }
1054 #endif
1055 #if defined(MAGICKCORE_WINDOWS_SUPPORT)
1056 NTGetExecutionPath(path,extent);
1057 #endif
1058 #if defined(__GNU__)
1059 {
1060 char
1061 *program_name;
1062
1063 ssize_t
1064 count;
1065
1066 count=0;
1067 program_name=program_invocation_name;
1068 if (*program_invocation_name != '/')
1069 {
1070 size_t
1071 extent;
1072
1073 extent=strlen(directory)+strlen(program_name)+2;
1074 program_name=AcquireQuantumMemory(extent,sizeof(*program_name));
1075 if (program_name == (char *) NULL)
1076 program_name=program_invocation_name;
1077 else
1078 count=FormatLocaleString(program_name,extent,"%s/%s",directory,
1079 program_invocation_name);
1080 }
1081 if (count != -1)
1082 {
1083 char
1084 execution_path[PATH_MAX+1];
1085
1086 if (realpath(program_name,execution_path) != (char *) NULL)
1087 (void) CopyMagickString(path,execution_path,extent);
1088 }
1089 if (program_name != program_invocation_name)
1090 program_name=(char *) RelinquishMagickMemory(program_name);
1091 }
1092 #endif
1093 #if defined(__OpenBSD__)
1094 {
1095 extern char
1096 *__progname;
1097
1098 (void) CopyMagickString(path,__progname,extent);
1099 }
1100 #endif
1101 return(IsPathAccessible(path));
1102 }
1103
1104 /*
1105 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1106 % %
1107 % %
1108 % %
1109 % G e t M a g i c k P a g e S i z e %
1110 % %
1111 % %
1112 % %
1113 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1114 %
1115 % GetMagickPageSize() returns the memory page size.
1116 %
1117 % The format of the GetMagickPageSize method is:
1118 %
1119 % ssize_t GetMagickPageSize()
1120 %
1121 */
GetMagickPageSize(void)1122 MagickPrivate ssize_t GetMagickPageSize(void)
1123 {
1124 static ssize_t
1125 page_size = -1;
1126
1127 if (page_size > 0)
1128 return(page_size);
1129 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
1130 page_size=(ssize_t) sysconf(_SC_PAGE_SIZE);
1131 #elif defined(MAGICKCORE_HAVE_GETPAGESIZE)
1132 page_size=(ssize_t) getpagesize();
1133 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
1134 page_size=NTGetPageSize();
1135 #endif
1136 if (page_size <= 0)
1137 page_size=4096;
1138 return(page_size);
1139 }
1140
1141 /*
1142 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1143 % %
1144 % %
1145 % %
1146 % G e t P a t h A t t r i b u t e s %
1147 % %
1148 % %
1149 % %
1150 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1151 %
1152 % GetPathAttributes() returns attributes (e.g. size of file) about a path.
1153 %
1154 % The path of the GetPathAttributes method is:
1155 %
1156 % MagickBooleanType GetPathAttributes(const char *path,void *attributes)
1157 %
1158 % A description of each parameter follows.
1159 %
1160 % o path: the file path.
1161 %
1162 % o attributes: the path attributes are returned here.
1163 %
1164 */
GetPathAttributes(const char * path,void * attributes)1165 MagickExport MagickBooleanType GetPathAttributes(const char *path,
1166 void *attributes)
1167 {
1168 MagickBooleanType
1169 status;
1170
1171 if (path == (const char *) NULL)
1172 {
1173 errno=EINVAL;
1174 return(MagickFalse);
1175 }
1176 (void) memset(attributes,0,sizeof(struct stat));
1177 status=stat_utf8(path,(struct stat *) attributes) == 0 ? MagickTrue :
1178 MagickFalse;
1179 return(status);
1180 }
1181
1182 /*
1183 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1184 % %
1185 % %
1186 % %
1187 % G e t P a t h C o m p o n e n t %
1188 % %
1189 % %
1190 % %
1191 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1192 %
1193 % GetPathComponent() returns the parent directory name, filename, basename, or
1194 % extension of a file path.
1195 %
1196 % The component string pointed to must have at least MagickPathExtent space
1197 % for the results to be stored.
1198 %
1199 % The format of the GetPathComponent function is:
1200 %
1201 % GetPathComponent(const char *path,PathType type,char *component)
1202 %
1203 % A description of each parameter follows:
1204 %
1205 % o path: Specifies a pointer to a character array that contains the
1206 % file path.
1207 %
1208 % o type: Specififies which file path component to return.
1209 %
1210 % o component: the selected file path component is returned here.
1211 %
1212 */
GetPathComponent(const char * path,PathType type,char * component)1213 MagickExport void GetPathComponent(const char *path,PathType type,
1214 char *component)
1215 {
1216 char
1217 *q;
1218
1219 register char
1220 *p;
1221
1222 size_t
1223 magick_length,
1224 subimage_offset,
1225 subimage_length;
1226
1227 assert(path != (const char *) NULL);
1228 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",path);
1229 assert(component != (char *) NULL);
1230 if (*path == '\0')
1231 {
1232 *component='\0';
1233 return;
1234 }
1235 (void) CopyMagickString(component,path,MagickPathExtent);
1236 subimage_length=0;
1237 subimage_offset=0;
1238 if (type != SubcanonicalPath)
1239 {
1240 p=component+strlen(component)-1;
1241 q=strrchr(component,'[');
1242 if ((strlen(component) > 2) && (*p == ']') && (q != (char *) NULL) &&
1243 ((q == component) || (*(q-1) != ']')) &&
1244 (IsPathAccessible(path) == MagickFalse))
1245 {
1246 /*
1247 Look for scene specification (e.g. img0001.pcd[4]).
1248 */
1249 *p='\0';
1250 if ((IsSceneGeometry(q+1,MagickFalse) == MagickFalse) &&
1251 (IsGeometry(q+1) == MagickFalse))
1252 *p=']';
1253 else
1254 {
1255 subimage_length=(size_t) (p-q);
1256 subimage_offset=(size_t) (q-component+1);
1257 *q='\0';
1258 }
1259 }
1260 }
1261 magick_length=0;
1262 #if defined(__OS2__)
1263 if (path[1] != ":")
1264 #endif
1265 for (p=component; *p != '\0'; p++)
1266 {
1267 if ((*p == '%') && (*(p+1) == '['))
1268 {
1269 /*
1270 Skip over %[...].
1271 */
1272 for (p++; (*p != ']') && (*p != '\0'); p++) ;
1273 if (*p == '\0')
1274 break;
1275 }
1276 if ((p != component) && (*p == ':') && (IsPathDirectory(component) < 0) &&
1277 (IsPathAccessible(component) == MagickFalse))
1278 {
1279 /*
1280 Look for image format specification (e.g. ps3:image).
1281 */
1282 *p='\0';
1283 if (IsMagickConflict(component) != MagickFalse)
1284 *p=':';
1285 else
1286 {
1287 magick_length=(size_t) (p-component+1);
1288 for (q=component; *(++p) != '\0'; q++)
1289 *q=(*p);
1290 *q='\0';
1291 }
1292 break;
1293 }
1294 }
1295 p=component;
1296 if (*p != '\0')
1297 for (p=component+strlen(component)-1; p > component; p--)
1298 if (IsBasenameSeparator(*p) != MagickFalse)
1299 break;
1300 switch (type)
1301 {
1302 case MagickPath:
1303 {
1304 if (magick_length != 0)
1305 (void) CopyMagickString(component,path,magick_length);
1306 else
1307 *component='\0';
1308 break;
1309 }
1310 case RootPath:
1311 {
1312 if (*component != '\0')
1313 {
1314 for (p=component+(strlen(component)-1); p > component; p--)
1315 {
1316 if (IsBasenameSeparator(*p) != MagickFalse)
1317 break;
1318 if (*p == '.')
1319 break;
1320 }
1321 if (*p == '.')
1322 *p='\0';
1323 break;
1324 }
1325 }
1326 case HeadPath:
1327 {
1328 *p='\0';
1329 break;
1330 }
1331 case TailPath:
1332 {
1333 if (IsBasenameSeparator(*p) != MagickFalse)
1334 (void) CopyMagickString(component,p+1,MagickPathExtent);
1335 break;
1336 }
1337 case BasePath:
1338 {
1339 if (IsBasenameSeparator(*p) != MagickFalse)
1340 (void) CopyMagickString(component,p+1,MagickPathExtent);
1341 if (*component != '\0')
1342 for (p=component+(strlen(component)-1); p > component; p--)
1343 if (*p == '.')
1344 {
1345 *p='\0';
1346 break;
1347 }
1348 break;
1349 }
1350 case ExtensionPath:
1351 {
1352 if (IsBasenameSeparator(*p) != MagickFalse)
1353 (void) CopyMagickString(component,p+1,MagickPathExtent);
1354 if (*component != '\0')
1355 for (p=component+strlen(component)-1; p > component; p--)
1356 if (*p == '.')
1357 break;
1358 *component='\0';
1359 if (*p == '.')
1360 (void) CopyMagickString(component,p+1,MagickPathExtent);
1361 break;
1362 }
1363 case SubimagePath:
1364 {
1365 *component='\0';
1366 if ((subimage_length != 0) && (magick_length < subimage_offset))
1367 (void) CopyMagickString(component,path+subimage_offset,subimage_length);
1368 break;
1369 }
1370 case SubcanonicalPath:
1371 case CanonicalPath:
1372 case UndefinedPath:
1373 break;
1374 }
1375 }
1376
1377 /*
1378 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1379 % %
1380 % %
1381 % %
1382 % G e t P a t h C o m p o n e n t s %
1383 % %
1384 % %
1385 % %
1386 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1387 %
1388 % GetPathComponents() returns a list of path components.
1389 %
1390 % The format of the GetPathComponents method is:
1391 %
1392 % char **GetPathComponents(const char *path,
1393 % size_t *number_componenets)
1394 %
1395 % A description of each parameter follows:
1396 %
1397 % o path: Specifies the string to segment into a list.
1398 %
1399 % o number_components: return the number of components in the list
1400 %
1401 */
GetPathComponents(const char * path,size_t * number_components)1402 MagickPrivate char **GetPathComponents(const char *path,
1403 size_t *number_components)
1404 {
1405 char
1406 **components;
1407
1408 register const char
1409 *p,
1410 *q;
1411
1412 register ssize_t
1413 i;
1414
1415 if (path == (char *) NULL)
1416 return((char **) NULL);
1417 *number_components=1;
1418 for (p=path; *p != '\0'; p++)
1419 if (IsBasenameSeparator(*p))
1420 (*number_components)++;
1421 components=(char **) AcquireQuantumMemory((size_t) *number_components+1UL,
1422 sizeof(*components));
1423 if (components == (char **) NULL)
1424 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1425 p=path;
1426 for (i=0; i < (ssize_t) *number_components; i++)
1427 {
1428 for (q=p; *q != '\0'; q++)
1429 if (IsBasenameSeparator(*q))
1430 break;
1431 components[i]=(char *) AcquireQuantumMemory((size_t) (q-p)+MagickPathExtent,
1432 sizeof(**components));
1433 if (components[i] == (char *) NULL)
1434 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1435 (void) CopyMagickString(components[i],p,(size_t) (q-p+1));
1436 p=q+1;
1437 }
1438 components[i]=(char *) NULL;
1439 return(components);
1440 }
1441
1442 /*
1443 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1444 % %
1445 % %
1446 % %
1447 % I s P a t h A c c e s s i b l e %
1448 % %
1449 % %
1450 % %
1451 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1452 %
1453 % IsPathAccessible() returns MagickTrue if the file as defined by the path is
1454 % accessible.
1455 %
1456 % The format of the IsPathAccessible method is:
1457 %
1458 % MagickBooleanType IsPathAccessible(const char *path)
1459 %
1460 % A description of each parameter follows.
1461 %
1462 % o path: Specifies a path to a file.
1463 %
1464 */
IsPathAccessible(const char * path)1465 MagickExport MagickBooleanType IsPathAccessible(const char *path)
1466 {
1467 MagickBooleanType
1468 status;
1469
1470 struct stat
1471 attributes;
1472
1473 if ((path == (const char *) NULL) || (*path == '\0'))
1474 return(MagickFalse);
1475 if (LocaleCompare(path,"-") == 0)
1476 return(MagickTrue);
1477 status=GetPathAttributes(path,&attributes);
1478 if (status == MagickFalse)
1479 return(status);
1480 if (S_ISREG(attributes.st_mode) == 0)
1481 return(MagickFalse);
1482 if (access_utf8(path,F_OK) != 0)
1483 return(MagickFalse);
1484 return(MagickTrue);
1485 }
1486
1487 /*
1488 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1489 % %
1490 % %
1491 % %
1492 + I s P a t h D i r e c t o r y %
1493 % %
1494 % %
1495 % %
1496 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1497 %
1498 % IsPathDirectory() returns -1 if the directory does not exist, 1 is returned
1499 % if the path represents a directory otherwise 0.
1500 %
1501 % The format of the IsPathDirectory method is:
1502 %
1503 % int IsPathDirectory(const char *path)
1504 %
1505 % A description of each parameter follows.
1506 %
1507 % o path: The directory path.
1508 %
1509 */
IsPathDirectory(const char * path)1510 static int IsPathDirectory(const char *path)
1511 {
1512 MagickBooleanType
1513 status;
1514
1515 struct stat
1516 attributes;
1517
1518 if ((path == (const char *) NULL) || (*path == '\0'))
1519 return(MagickFalse);
1520 status=GetPathAttributes(path,&attributes);
1521 if (status == MagickFalse)
1522 return(-1);
1523 if (S_ISDIR(attributes.st_mode) == 0)
1524 return(0);
1525 return(1);
1526 }
1527
1528 /*
1529 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1530 % %
1531 % %
1532 % %
1533 % L i s t F i l e s %
1534 % %
1535 % %
1536 % %
1537 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1538 %
1539 % ListFiles() reads the directory specified and returns a list of filenames
1540 % contained in the directory sorted in ascending alphabetic order.
1541 %
1542 % The format of the ListFiles function is:
1543 %
1544 % char **ListFiles(const char *directory,const char *pattern,
1545 % ssize_t *number_entries)
1546 %
1547 % A description of each parameter follows:
1548 %
1549 % o filelist: Method ListFiles returns a list of filenames contained
1550 % in the directory. If the directory specified cannot be read or it is
1551 % a file a NULL list is returned.
1552 %
1553 % o directory: Specifies a pointer to a text string containing a directory
1554 % name.
1555 %
1556 % o pattern: Specifies a pointer to a text string containing a pattern.
1557 %
1558 % o number_entries: This integer returns the number of filenames in the
1559 % list.
1560 %
1561 */
1562
1563 #if defined(__cplusplus) || defined(c_plusplus)
1564 extern "C" {
1565 #endif
1566
FileCompare(const void * x,const void * y)1567 static int FileCompare(const void *x,const void *y)
1568 {
1569 register const char
1570 **p,
1571 **q;
1572
1573 p=(const char **) x;
1574 q=(const char **) y;
1575 return(LocaleCompare(*p,*q));
1576 }
1577
1578 #if defined(__cplusplus) || defined(c_plusplus)
1579 }
1580 #endif
1581
ListFiles(const char * directory,const char * pattern,size_t * number_entries)1582 MagickPrivate char **ListFiles(const char *directory,const char *pattern,
1583 size_t *number_entries)
1584 {
1585 char
1586 **filelist;
1587
1588 DIR
1589 *current_directory;
1590
1591 struct dirent
1592 *buffer,
1593 *entry;
1594
1595 size_t
1596 max_entries;
1597
1598 /*
1599 Open directory.
1600 */
1601 assert(directory != (const char *) NULL);
1602 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",directory);
1603 assert(pattern != (const char *) NULL);
1604 assert(number_entries != (size_t *) NULL);
1605 *number_entries=0;
1606 current_directory=opendir(directory);
1607 if (current_directory == (DIR *) NULL)
1608 return((char **) NULL);
1609 /*
1610 Allocate filelist.
1611 */
1612 max_entries=2048;
1613 filelist=(char **) AcquireQuantumMemory((size_t) max_entries,
1614 sizeof(*filelist));
1615 if (filelist == (char **) NULL)
1616 {
1617 (void) closedir(current_directory);
1618 return((char **) NULL);
1619 }
1620 /*
1621 Save the current and change to the new directory.
1622 */
1623 buffer=(struct dirent *) AcquireMagickMemory(sizeof(*buffer)+FILENAME_MAX+1);
1624 if (buffer == (struct dirent *) NULL)
1625 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1626 while ((MagickReadDirectory(current_directory,buffer,&entry) == 0) &&
1627 (entry != (struct dirent *) NULL))
1628 {
1629 if (*entry->d_name == '.')
1630 continue;
1631 if ((IsPathDirectory(entry->d_name) > 0) ||
1632 #if defined(MAGICKCORE_WINDOWS_SUPPORT)
1633 (GlobExpression(entry->d_name,pattern,MagickTrue) != MagickFalse))
1634 #else
1635 (GlobExpression(entry->d_name,pattern,MagickFalse) != MagickFalse))
1636 #endif
1637 {
1638 if (*number_entries >= max_entries)
1639 {
1640 /*
1641 Extend the file list.
1642 */
1643 max_entries<<=1;
1644 filelist=(char **) ResizeQuantumMemory(filelist,(size_t)
1645 max_entries,sizeof(*filelist));
1646 if (filelist == (char **) NULL)
1647 break;
1648 }
1649 #if defined(vms)
1650 {
1651 register char
1652 *p;
1653
1654 p=strchr(entry->d_name,';');
1655 if (p)
1656 *p='\0';
1657 if (*number_entries > 0)
1658 if (LocaleCompare(entry->d_name,filelist[*number_entries-1]) == 0)
1659 continue;
1660 }
1661 #endif
1662 filelist[*number_entries]=(char *) AcquireString(entry->d_name);
1663 (*number_entries)++;
1664 }
1665 }
1666 buffer=(struct dirent *) RelinquishMagickMemory(buffer);
1667 (void) closedir(current_directory);
1668 if (filelist == (char **) NULL)
1669 return((char **) NULL);
1670 /*
1671 Sort filelist in ascending order.
1672 */
1673 qsort((void *) filelist,(size_t) *number_entries,sizeof(*filelist),
1674 FileCompare);
1675 return(filelist);
1676 }
1677
1678 /*
1679 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1680 % %
1681 % %
1682 % %
1683 % M a g i c k D e l a y %
1684 % %
1685 % %
1686 % %
1687 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1688 %
1689 % MagickDelay() suspends program execution for the number of milliseconds
1690 % specified.
1691 %
1692 % The format of the Delay method is:
1693 %
1694 % void MagickDelay(const MagickSizeType milliseconds)
1695 %
1696 % A description of each parameter follows:
1697 %
1698 % o milliseconds: Specifies the number of milliseconds to delay before
1699 % returning.
1700 %
1701 */
MagickDelay(const MagickSizeType milliseconds)1702 MagickExport void MagickDelay(const MagickSizeType milliseconds)
1703 {
1704 if (milliseconds == 0)
1705 return;
1706 #if defined(MAGICKCORE_HAVE_NANOSLEEP)
1707 {
1708 struct timespec
1709 timer;
1710
1711 timer.tv_sec=(time_t) (milliseconds/1000);
1712 timer.tv_nsec=(milliseconds % 1000)*1000*1000;
1713 (void) nanosleep(&timer,(struct timespec *) NULL);
1714 }
1715 #elif defined(MAGICKCORE_HAVE_USLEEP)
1716 usleep(1000*milliseconds);
1717 #elif defined(MAGICKCORE_HAVE_SELECT)
1718 {
1719 struct timeval
1720 timer;
1721
1722 timer.tv_sec=(long) milliseconds/1000;
1723 timer.tv_usec=(long) (milliseconds % 1000)*1000;
1724 (void) select(0,(XFD_SET *) NULL,(XFD_SET *) NULL,(XFD_SET *) NULL,&timer);
1725 }
1726 #elif defined(MAGICKCORE_HAVE_POLL)
1727 (void) poll((struct pollfd *) NULL,0,(int) milliseconds);
1728 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
1729 Sleep((long) milliseconds);
1730 #elif defined(vms)
1731 {
1732 float
1733 timer;
1734
1735 timer=milliseconds/1000.0;
1736 lib$wait(&timer);
1737 }
1738 #elif defined(__BEOS__)
1739 snooze(1000*milliseconds);
1740 #else
1741 # error "Time delay method not defined."
1742 #endif
1743 }
1744
1745 /*
1746 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1747 % %
1748 % %
1749 % %
1750 % M u l t i l i n e C e n s u s %
1751 % %
1752 % %
1753 % %
1754 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1755 %
1756 % MultilineCensus() returns the number of lines within a label. A line is
1757 % represented by a \n character.
1758 %
1759 % The format of the MultilineCenus method is:
1760 %
1761 % size_t MultilineCensus(const char *label)
1762 %
1763 % A description of each parameter follows.
1764 %
1765 % o label: This character string is the label.
1766 %
1767 */
MultilineCensus(const char * label)1768 MagickExport size_t MultilineCensus(const char *label)
1769 {
1770 size_t
1771 number_lines;
1772
1773 /*
1774 Determine the number of lines within this label.
1775 */
1776 if (label == (char *) NULL)
1777 return(0);
1778 for (number_lines=1; *label != '\0'; label++)
1779 if (*label == '\n')
1780 number_lines++;
1781 return(number_lines);
1782 }
1783
1784 /*
1785 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1786 % %
1787 % %
1788 % %
1789 % S h r e d F i l e %
1790 % %
1791 % %
1792 % %
1793 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1794 %
1795 % ShredFile() overwrites the specified file with zeros or random data and then
1796 % removes it. The overwrite is optional and is only required to help keep
1797 % the contents of the file private. On the first pass, the file is zeroed.
1798 % For subsequent passes, random data is written.
1799 %
1800 % The format of the ShredFile method is:
1801 %
1802 % MagickBooleanType ShredFile(const char *path)
1803 %
1804 % A description of each parameter follows.
1805 %
1806 % o path: Specifies a path to a file.
1807 %
1808 */
ShredFile(const char * path)1809 MagickPrivate MagickBooleanType ShredFile(const char *path)
1810 {
1811 char
1812 *passes;
1813
1814 int
1815 file,
1816 status;
1817
1818 MagickSizeType
1819 length;
1820
1821 register ssize_t
1822 i;
1823
1824 size_t
1825 quantum;
1826
1827 struct stat
1828 file_stats;
1829
1830 if ((path == (const char *) NULL) || (*path == '\0'))
1831 return(MagickFalse);
1832 passes=GetPolicyValue("system:shred");
1833 if (passes == (char *) NULL)
1834 passes=GetEnvironmentValue("MAGICK_SHRED_PASSES");
1835 if (passes == (char *) NULL)
1836 {
1837 /*
1838 Don't shred the file, just remove it.
1839 */
1840 status=remove_utf8(path);
1841 if (status == -1)
1842 {
1843 (void) LogMagickEvent(ExceptionEvent,GetMagickModule(),
1844 "Failed to remove: %s",path);
1845 return(MagickFalse);
1846 }
1847 return(MagickTrue);
1848 }
1849 file=open_utf8(path,O_WRONLY | O_EXCL | O_BINARY,S_MODE);
1850 if (file == -1)
1851 {
1852 /*
1853 Don't shred the file, just remove it.
1854 */
1855 passes=DestroyString(passes);
1856 status=remove_utf8(path);
1857 if (status == -1)
1858 (void) LogMagickEvent(ExceptionEvent,GetMagickModule(),
1859 "Failed to remove: %s",path);
1860 return(MagickFalse);
1861 }
1862 /*
1863 Shred the file.
1864 */
1865 quantum=(size_t) MagickMaxBufferExtent;
1866 if ((fstat(file,&file_stats) == 0) && (file_stats.st_size > 0))
1867 quantum=(size_t) MagickMin(file_stats.st_size,MagickMaxBufferExtent);
1868 length=(MagickSizeType) file_stats.st_size;
1869 for (i=0; i < (ssize_t) StringToInteger(passes); i++)
1870 {
1871 RandomInfo
1872 *random_info;
1873
1874 register MagickOffsetType
1875 j;
1876
1877 ssize_t
1878 count;
1879
1880 if (lseek(file,0,SEEK_SET) < 0)
1881 break;
1882 random_info=AcquireRandomInfo();
1883 for (j=0; j < (MagickOffsetType) length; j+=count)
1884 {
1885 StringInfo
1886 *key;
1887
1888 key=GetRandomKey(random_info,quantum);
1889 if (i == 0)
1890 ResetStringInfo(key); /* zero on first pass */
1891 count=write(file,GetStringInfoDatum(key),(size_t)
1892 MagickMin((MagickSizeType) quantum,length-j));
1893 key=DestroyStringInfo(key);
1894 if (count <= 0)
1895 {
1896 count=0;
1897 if (errno != EINTR)
1898 break;
1899 }
1900 }
1901 random_info=DestroyRandomInfo(random_info);
1902 if (j < (MagickOffsetType) length)
1903 break;
1904 }
1905 status=close(file);
1906 status=remove_utf8(path);
1907 if (status != -1)
1908 status=StringToInteger(passes);
1909 passes=DestroyString(passes);
1910 return((status == -1 || i < (ssize_t) status) ? MagickFalse : MagickTrue);
1911 }
1912