MagickCore  7.0.10
utility.c
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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 1999-2020 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"
48 #include "MagickCore/geometry.h"
50 #include "MagickCore/list.h"
51 #include "MagickCore/log.h"
53 #include "MagickCore/memory_.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"
62 #include "MagickCore/statistic.h"
63 #include "MagickCore/string_.h"
65 #include "MagickCore/token.h"
67 #include "MagickCore/utility.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 */
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 
154  char *destination)
155 {
156  int
157  destination_file,
158  source_file;
159 
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);
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 */
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 */
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 */
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 */
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 */
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 #if defined(MAGICKCORE_HAVE_GETPWNAM_R)
651  buffer[MagickPathExtent],
652 #endif
653  username[MagickPathExtent];
654 
655  register char
656  *p;
657 
658  struct passwd
659  *entry;
660 
661  /*
662  Substitute ~ with home directory from password file.
663  */
664  (void) CopyMagickString(username,path+1,MagickPathExtent);
665  p=strchr(username,'/');
666  if (p != (char *) NULL)
667  *p='\0';
668 #if !defined(MAGICKCORE_HAVE_GETPWNAM_R)
669  entry=getpwnam(username);
670 #else
671  struct passwd
672  pwd;
673 
674  entry=(struct passwd *) NULL;
675  if (getpwnam_r(username,&pwd,buffer,sizeof(buffer),&entry) < 0)
676  return;
677 #endif
678  if (entry == (struct passwd *) NULL)
679  return;
680  (void) CopyMagickString(expand_path,entry->pw_dir,MagickPathExtent);
681  if (p != (char *) NULL)
682  {
683  (void) ConcatenateMagickString(expand_path,"/",MagickPathExtent);
684  (void) ConcatenateMagickString(expand_path,p+1,MagickPathExtent);
685  }
686 #endif
687  }
688  (void) CopyMagickString(path,expand_path,MagickPathExtent);
689 }
690 
691 /*
692 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
693 % %
694 % %
695 % %
696 % E x p a n d F i l e n a m e s %
697 % %
698 % %
699 % %
700 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
701 %
702 % ExpandFilenames() checks each argument of the given argument array, and
703 % expands it if they have a wildcard character.
704 %
705 % Any coder prefix (EG: 'coder:filename') or read modifier postfix (EG:
706 % 'filename[...]') are ignored during the file the expansion, but will be
707 % included in the final argument. If no filename matching the meta-character
708 % 'glob' is found the original argument is returned.
709 %
710 % For example, an argument of '*.gif[20x20]' will be replaced by the list
711 % 'abc.gif[20x20]', 'foobar.gif[20x20]', 'xyzzy.gif[20x20]'
712 % if such filenames exist, (in the current directory in this case).
713 %
714 % Meta-characters handled...
715 % @ read a list of filenames (no further expansion performed)
716 % ~ At start of filename expands to HOME environemtn variable
717 % * matches any string including an empty string
718 % ? matches by any single character
719 %
720 % WARNING: filenames starting with '.' (hidden files in a UNIX file system)
721 % will never be expanded. Attempting to epand '.*' will produce no change.
722 %
723 % Expansion is ignored for coders "label:" "caption:" "pango:" and "vid:".
724 % Which provide their own '@' meta-character handling.
725 %
726 % You can see the results of the expansion using "Configure" log events.
727 %
728 % The returned list should be freed using DestroyStringList().
729 %
730 % However the strings in the original pointed to argv are not
731 % freed (TO BE CHECKED). So a copy of the original pointer (and count)
732 % should be kept separate if they need to be freed later.
733 %
734 % The format of the ExpandFilenames function is:
735 %
736 % status=ExpandFilenames(int *number_arguments,char ***arguments)
737 %
738 % A description of each parameter follows:
739 %
740 % o number_arguments: Specifies a pointer to an integer describing the
741 % number of elements in the argument vector.
742 %
743 % o arguments: Specifies a pointer to a text array containing the command
744 % line arguments.
745 %
746 */
748  char ***arguments)
749 {
750  char
751  home_directory[MagickPathExtent],
752  **vector;
753 
754  register ssize_t
755  i,
756  j;
757 
758  size_t
759  number_files;
760 
761  ssize_t
762  count,
763  parameters;
764 
765  /*
766  Allocate argument vector.
767  */
768  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
769  assert(number_arguments != (int *) NULL);
770  assert(arguments != (char ***) NULL);
771  vector=(char **) AcquireQuantumMemory((size_t) (*number_arguments+1),
772  sizeof(*vector));
773  if (vector == (char **) NULL)
774  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
775  /*
776  Expand any wildcard filenames.
777  */
778  *home_directory='\0';
779  count=0;
780  for (i=0; i < (ssize_t) *number_arguments; i++)
781  {
782  char
783  **filelist,
784  filename[MagickPathExtent],
785  magick[MagickPathExtent],
786  *option,
787  path[MagickPathExtent],
788  subimage[MagickPathExtent];
789 
791  destroy;
792 
793  option=(*arguments)[i];
794  *magick='\0';
795  *path='\0';
796  *filename='\0';
797  *subimage='\0';
798  number_files=0;
799  vector[count++]=ConstantString(option);
800  destroy=MagickTrue;
802  if (parameters > 0)
803  {
804  /*
805  Do not expand command option parameters.
806  */
807  for (j=0; j < parameters; j++)
808  {
809  i++;
810  if (i == (ssize_t) *number_arguments)
811  break;
812  option=(*arguments)[i];
813  vector[count++]=ConstantString(option);
814  }
815  continue;
816  }
817  if ((*option == '"') || (*option == '\''))
818  continue;
819  GetPathComponent(option,TailPath,filename);
820  GetPathComponent(option,MagickPath,magick);
821  if ((LocaleCompare(magick,"CAPTION") == 0) ||
822  (LocaleCompare(magick,"LABEL") == 0) ||
823  (LocaleCompare(magick,"PANGO") == 0) ||
824  (LocaleCompare(magick,"VID") == 0))
825  continue;
826  if ((IsGlob(filename) == MagickFalse) && (*option != '@'))
827  continue;
828  if ((*option != '@') && (IsPathAccessible(option) == MagickFalse))
829  {
830  /*
831  Generate file list from wildcard filename (e.g. *.jpg).
832  */
833  GetPathComponent(option,HeadPath,path);
834  GetPathComponent(option,SubimagePath,subimage);
835  ExpandFilename(path);
836  if (*home_directory == '\0')
837  getcwd_utf8(home_directory,MagickPathExtent-1);
838  filelist=ListFiles(*path == '\0' ? home_directory : path,filename,
839  &number_files);
840  }
841  else
842  {
843  char
844  *files;
845 
847  *exception;
848 
849  int
850  length;
851 
852  /*
853  Generate file list from file list (e.g. @filelist.txt).
854  */
855  exception=AcquireExceptionInfo();
856  files=FileToString(option+1,~0UL,exception);
857  exception=DestroyExceptionInfo(exception);
858  if (files == (char *) NULL)
859  continue;
860  filelist=StringToArgv(files,&length);
861  if (filelist == (char **) NULL)
862  continue;
863  files=DestroyString(files);
864  filelist[0]=DestroyString(filelist[0]);
865  for (j=0; j < (ssize_t) (length-1); j++)
866  filelist[j]=filelist[j+1];
867  number_files=(size_t) length-1;
868  }
869  if (filelist == (char **) NULL)
870  continue;
871  for (j=0; j < (ssize_t) number_files; j++)
872  if (IsPathDirectory(filelist[j]) <= 0)
873  break;
874  if (j == (ssize_t) number_files)
875  {
876  for (j=0; j < (ssize_t) number_files; j++)
877  filelist[j]=DestroyString(filelist[j]);
878  filelist=(char **) RelinquishMagickMemory(filelist);
879  continue;
880  }
881  /*
882  Transfer file list to argument vector.
883  */
884  vector=(char **) ResizeQuantumMemory(vector,(size_t) *number_arguments+
885  count+number_files+1,sizeof(*vector));
886  if (vector == (char **) NULL)
887  {
888  for (j=0; j < (ssize_t) number_files; j++)
889  filelist[j]=DestroyString(filelist[j]);
890  filelist=(char **) RelinquishMagickMemory(filelist);
891  return(MagickFalse);
892  }
893  for (j=0; j < (ssize_t) number_files; j++)
894  {
895  option=filelist[j];
897  if (parameters > 0)
898  {
899  ssize_t
900  k;
901 
902  /*
903  Do not expand command option parameters.
904  */
905  vector[count++]=ConstantString(option);
906  for (k=0; k < parameters; k++)
907  {
908  j++;
909  if (j == (ssize_t) number_files)
910  break;
911  option=filelist[j];
912  vector[count++]=ConstantString(option);
913  }
914  continue;
915  }
916  (void) CopyMagickString(filename,path,MagickPathExtent);
917  if (*path != '\0')
920  if (filelist[j] != (char *) NULL)
921  (void) ConcatenateMagickString(filename,filelist[j],MagickPathExtent);
922  filelist[j]=DestroyString(filelist[j]);
923  if (strlen(filename) >= (MagickPathExtent-1))
924  ThrowFatalException(OptionFatalError,"FilenameTruncated");
925  if (IsPathDirectory(filename) <= 0)
926  {
927  char
928  file_path[MagickPathExtent];
929 
930  *file_path='\0';
931  if (*magick != '\0')
932  {
933  (void) ConcatenateMagickString(file_path,magick,
935  (void) ConcatenateMagickString(file_path,":",MagickPathExtent);
936  }
937  (void) ConcatenateMagickString(file_path,filename,MagickPathExtent);
938  if (*subimage != '\0')
939  {
940  (void) ConcatenateMagickString(file_path,"[",MagickPathExtent);
941  (void) ConcatenateMagickString(file_path,subimage,
943  (void) ConcatenateMagickString(file_path,"]",MagickPathExtent);
944  }
945  if (strlen(file_path) >= (MagickPathExtent-1))
946  ThrowFatalException(OptionFatalError,"FilenameTruncated");
947  if (destroy != MagickFalse)
948  {
949  count--;
950  vector[count]=DestroyString(vector[count]);
951  destroy=MagickFalse;
952  }
953  vector[count++]=ConstantString(file_path);
954  }
955  }
956  filelist=(char **) RelinquishMagickMemory(filelist);
957  }
958  vector[count]=(char *) NULL;
959  if (IsEventLogging() != MagickFalse)
960  {
961  char
962  *command_line;
963 
964  command_line=AcquireString(vector[0]);
965  for (i=1; i < count; i++)
966  {
967  (void) ConcatenateString(&command_line," {");
968  (void) ConcatenateString(&command_line,vector[i]);
969  (void) ConcatenateString(&command_line,"}");
970  }
972  "Command line: %s",command_line);
973  command_line=DestroyString(command_line);
974  }
975  *number_arguments=(int) count;
976  *arguments=vector;
977  return(MagickTrue);
978 }
979 
980 /*
981 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
982 % %
983 % %
984 % %
985 % G e t E x e c u t i o n P a t h %
986 % %
987 % %
988 % %
989 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
990 %
991 % GetExecutionPath() returns the pathname of the executable that started
992 % the process. On success MagickTrue is returned, otherwise MagickFalse.
993 %
994 % The format of the GetExecutionPath method is:
995 %
996 % MagickBooleanType GetExecutionPath(char *path,const size_t extent)
997 %
998 % A description of each parameter follows:
999 %
1000 % o path: the pathname of the executable that started the process.
1001 %
1002 % o extent: the maximum extent of the path.
1003 %
1004 */
1005 MagickPrivate MagickBooleanType GetExecutionPath(char *path,const size_t extent)
1006 {
1007  char
1008  *directory;
1009 
1010  *path='\0';
1011  directory=getcwd(path,(unsigned long) extent);
1012  (void) directory;
1013 #if defined(MAGICKCORE_HAVE_GETPID) && defined(MAGICKCORE_HAVE_READLINK) && defined(PATH_MAX)
1014  {
1015  char
1016  execution_path[PATH_MAX+1],
1017  link_path[MagickPathExtent];
1018 
1019  ssize_t
1020  count;
1021 
1022  (void) FormatLocaleString(link_path,MagickPathExtent,"/proc/%.20g/exe",
1023  (double) getpid());
1024  count=readlink(link_path,execution_path,PATH_MAX);
1025  if (count == -1)
1026  {
1027  (void) FormatLocaleString(link_path,MagickPathExtent,"/proc/%.20g/file",
1028  (double) getpid());
1029  count=readlink(link_path,execution_path,PATH_MAX);
1030  }
1031  if ((count > 0) && (count <= (ssize_t) PATH_MAX))
1032  {
1033  execution_path[count]='\0';
1034  (void) CopyMagickString(path,execution_path,extent);
1035  }
1036  }
1037 #endif
1038 #if defined(MAGICKCORE_HAVE__NSGETEXECUTABLEPATH)
1039  {
1040  char
1041  executable_path[PATH_MAX << 1],
1042  execution_path[PATH_MAX+1];
1043 
1044  uint32_t
1045  length;
1046 
1047  length=sizeof(executable_path);
1048  if ((_NSGetExecutablePath(executable_path,&length) == 0) &&
1049  (realpath(executable_path,execution_path) != (char *) NULL))
1050  (void) CopyMagickString(path,execution_path,extent);
1051  }
1052 #endif
1053 #if defined(MAGICKCORE_HAVE_GETEXECNAME)
1054  {
1055  const char
1056  *execution_path;
1057 
1058  execution_path=(const char *) getexecname();
1059  if (execution_path != (const char *) NULL)
1060  {
1061  if (*execution_path != *DirectorySeparator)
1062  (void) ConcatenateMagickString(path,DirectorySeparator,extent);
1063  (void) ConcatenateMagickString(path,execution_path,extent);
1064  }
1065  }
1066 #endif
1067 #if defined(MAGICKCORE_WINDOWS_SUPPORT)
1068  NTGetExecutionPath(path,extent);
1069 #endif
1070 #if defined(__GNU__)
1071  {
1072  char
1073  *program_name;
1074 
1075  ssize_t
1076  count;
1077 
1078  count=0;
1079  program_name=program_invocation_name;
1080  if (*program_invocation_name != '/')
1081  {
1082  size_t
1083  extent;
1084 
1085  extent=strlen(directory)+strlen(program_name)+2;
1086  program_name=AcquireQuantumMemory(extent,sizeof(*program_name));
1087  if (program_name == (char *) NULL)
1088  program_name=program_invocation_name;
1089  else
1090  count=FormatLocaleString(program_name,extent,"%s/%s",directory,
1091  program_invocation_name);
1092  }
1093  if (count != -1)
1094  {
1095  char
1096  execution_path[PATH_MAX+1];
1097 
1098  if (realpath(program_name,execution_path) != (char *) NULL)
1099  (void) CopyMagickString(path,execution_path,extent);
1100  }
1101  if (program_name != program_invocation_name)
1102  program_name=(char *) RelinquishMagickMemory(program_name);
1103  }
1104 #endif
1105 #if defined(__OpenBSD__)
1106  {
1107  extern char
1108  *__progname;
1109 
1110  (void) CopyMagickString(path,__progname,extent);
1111  }
1112 #endif
1113  return(IsPathAccessible(path));
1114 }
1115 
1116 /*
1117 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1118 % %
1119 % %
1120 % %
1121 % G e t M a g i c k P a g e S i z e %
1122 % %
1123 % %
1124 % %
1125 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1126 %
1127 % GetMagickPageSize() returns the memory page size.
1128 %
1129 % The format of the GetMagickPageSize method is:
1130 %
1131 % ssize_t GetMagickPageSize()
1132 %
1133 */
1135 {
1136  static ssize_t
1137  page_size = -1;
1138 
1139  if (page_size > 0)
1140  return(page_size);
1141 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
1142  page_size=(ssize_t) sysconf(_SC_PAGE_SIZE);
1143 #elif defined(MAGICKCORE_HAVE_GETPAGESIZE)
1144  page_size=(ssize_t) getpagesize();
1145 #endif
1146  if (page_size <= 0)
1147  page_size=4096;
1148  return(page_size);
1149 }
1150 
1151 /*
1152 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1153 % %
1154 % %
1155 % %
1156 % G e t P a t h A t t r i b u t e s %
1157 % %
1158 % %
1159 % %
1160 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1161 %
1162 % GetPathAttributes() returns attributes (e.g. size of file) about a path.
1163 %
1164 % The path of the GetPathAttributes method is:
1165 %
1166 % MagickBooleanType GetPathAttributes(const char *path,void *attributes)
1167 %
1168 % A description of each parameter follows.
1169 %
1170 % o path: the file path.
1171 %
1172 % o attributes: the path attributes are returned here.
1173 %
1174 */
1176  void *attributes)
1177 {
1179  status;
1180 
1181  if (path == (const char *) NULL)
1182  {
1183  errno=EINVAL;
1184  return(MagickFalse);
1185  }
1186  (void) memset(attributes,0,sizeof(struct stat));
1187  status=stat_utf8(path,(struct stat *) attributes) == 0 ? MagickTrue :
1188  MagickFalse;
1189  return(status);
1190 }
1191 
1192 /*
1193 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1194 % %
1195 % %
1196 % %
1197 % G e t P a t h C o m p o n e n t %
1198 % %
1199 % %
1200 % %
1201 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1202 %
1203 % GetPathComponent() returns the parent directory name, filename, basename, or
1204 % extension of a file path.
1205 %
1206 % The component string pointed to must have at least MagickPathExtent space
1207 % for the results to be stored.
1208 %
1209 % The format of the GetPathComponent function is:
1210 %
1211 % GetPathComponent(const char *path,PathType type,char *component)
1212 %
1213 % A description of each parameter follows:
1214 %
1215 % o path: Specifies a pointer to a character array that contains the
1216 % file path.
1217 %
1218 % o type: Specififies which file path component to return.
1219 %
1220 % o component: the selected file path component is returned here.
1221 %
1222 */
1223 MagickExport void GetPathComponent(const char *path,PathType type,
1224  char *component)
1225 {
1226  char
1227  *q;
1228 
1229  register char
1230  *p;
1231 
1232  size_t
1233  magick_length,
1234  subimage_offset,
1235  subimage_length;
1236 
1237  assert(path != (const char *) NULL);
1238  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",path);
1239  assert(component != (char *) NULL);
1240  if (*path == '\0')
1241  {
1242  *component='\0';
1243  return;
1244  }
1245  (void) CopyMagickString(component,path,MagickPathExtent);
1246  subimage_length=0;
1247  subimage_offset=0;
1248  if (type != SubcanonicalPath)
1249  {
1250  p=component+strlen(component)-1;
1251  if ((strlen(component) > 2) && (*p == ']'))
1252  {
1253  q=strrchr(component,'[');
1254  if ((q != (char *) NULL) && ((q == component) || (*(q-1) != ']')) &&
1255  (IsPathAccessible(path) == MagickFalse))
1256  {
1257  /*
1258  Look for scene specification (e.g. img0001.pcd[4]).
1259  */
1260  *p='\0';
1261  if ((IsSceneGeometry(q+1,MagickFalse) == MagickFalse) &&
1262  (IsGeometry(q+1) == MagickFalse))
1263  *p=']';
1264  else
1265  {
1266  subimage_length=(size_t) (p-q);
1267  subimage_offset=(size_t) (q-component+1);
1268  *q='\0';
1269  }
1270  }
1271  }
1272  }
1273  magick_length=0;
1274 #if defined(__OS2__)
1275  if (path[1] != ":")
1276 #endif
1277  for (p=component; *p != '\0'; p++)
1278  {
1279  if ((*p == '%') && (*(p+1) == '['))
1280  {
1281  /*
1282  Skip over %[...].
1283  */
1284  for (p++; (*p != ']') && (*p != '\0'); p++) ;
1285  if (*p == '\0')
1286  break;
1287  }
1288  if ((p != component) && (*p == ':') && (IsPathDirectory(component) < 0) &&
1289  (IsPathAccessible(component) == MagickFalse))
1290  {
1291  /*
1292  Look for image format specification (e.g. ps3:image).
1293  */
1294  *p='\0';
1295  if (IsMagickConflict(component) != MagickFalse)
1296  *p=':';
1297  else
1298  {
1299  magick_length=(size_t) (p-component+1);
1300  for (q=component; *(++p) != '\0'; q++)
1301  *q=(*p);
1302  *q='\0';
1303  }
1304  break;
1305  }
1306  }
1307  p=component;
1308  if (*p != '\0')
1309  for (p=component+strlen(component)-1; p > component; p--)
1310  if (IsBasenameSeparator(*p) != MagickFalse)
1311  break;
1312  switch (type)
1313  {
1314  case MagickPath:
1315  {
1316  if (magick_length != 0)
1317  (void) CopyMagickString(component,path,magick_length);
1318  else
1319  *component='\0';
1320  break;
1321  }
1322  case RootPath:
1323  {
1324  if (*component != '\0')
1325  {
1326  for (p=component+(strlen(component)-1); p > component; p--)
1327  {
1328  if (IsBasenameSeparator(*p) != MagickFalse)
1329  break;
1330  if (*p == '.')
1331  break;
1332  }
1333  if (*p == '.')
1334  *p='\0';
1335  break;
1336  }
1337  }
1338  case HeadPath:
1339  {
1340  *p='\0';
1341  break;
1342  }
1343  case TailPath:
1344  {
1345  if (IsBasenameSeparator(*p) != MagickFalse)
1346  (void) CopyMagickString(component,p+1,MagickPathExtent);
1347  break;
1348  }
1349  case BasePath:
1350  {
1351  if (IsBasenameSeparator(*p) != MagickFalse)
1352  (void) CopyMagickString(component,p+1,MagickPathExtent);
1353  if (*component != '\0')
1354  for (p=component+(strlen(component)-1); p > component; p--)
1355  if (*p == '.')
1356  {
1357  *p='\0';
1358  break;
1359  }
1360  break;
1361  }
1362  case ExtensionPath:
1363  {
1364  if (IsBasenameSeparator(*p) != MagickFalse)
1365  (void) CopyMagickString(component,p+1,MagickPathExtent);
1366  if (*component != '\0')
1367  for (p=component+strlen(component)-1; p > component; p--)
1368  if (*p == '.')
1369  break;
1370  *component='\0';
1371  if (*p == '.')
1372  (void) CopyMagickString(component,p+1,MagickPathExtent);
1373  break;
1374  }
1375  case SubimagePath:
1376  {
1377  *component='\0';
1378  if ((subimage_length != 0) && (magick_length < subimage_offset))
1379  (void) CopyMagickString(component,path+subimage_offset,subimage_length);
1380  break;
1381  }
1382  case SubcanonicalPath:
1383  case CanonicalPath:
1384  case UndefinedPath:
1385  break;
1386  }
1387 }
1388 
1389 /*
1390 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1391 % %
1392 % %
1393 % %
1394 % G e t P a t h C o m p o n e n t s %
1395 % %
1396 % %
1397 % %
1398 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1399 %
1400 % GetPathComponents() returns a list of path components.
1401 %
1402 % The format of the GetPathComponents method is:
1403 %
1404 % char **GetPathComponents(const char *path,
1405 % size_t *number_componenets)
1406 %
1407 % A description of each parameter follows:
1408 %
1409 % o path: Specifies the string to segment into a list.
1410 %
1411 % o number_components: return the number of components in the list
1412 %
1413 */
1414 MagickPrivate char **GetPathComponents(const char *path,
1415  size_t *number_components)
1416 {
1417  char
1418  **components;
1419 
1420  register const char
1421  *p,
1422  *q;
1423 
1424  register ssize_t
1425  i;
1426 
1427  if (path == (char *) NULL)
1428  return((char **) NULL);
1429  *number_components=1;
1430  for (p=path; *p != '\0'; p++)
1431  if (IsBasenameSeparator(*p))
1432  (*number_components)++;
1433  components=(char **) AcquireQuantumMemory((size_t) *number_components+1UL,
1434  sizeof(*components));
1435  if (components == (char **) NULL)
1436  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1437  p=path;
1438  for (i=0; i < (ssize_t) *number_components; i++)
1439  {
1440  for (q=p; *q != '\0'; q++)
1441  if (IsBasenameSeparator(*q))
1442  break;
1443  components[i]=(char *) AcquireQuantumMemory((size_t) (q-p)+MagickPathExtent,
1444  sizeof(**components));
1445  if (components[i] == (char *) NULL)
1446  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1447  (void) CopyMagickString(components[i],p,(size_t) (q-p+1));
1448  p=q+1;
1449  }
1450  components[i]=(char *) NULL;
1451  return(components);
1452 }
1453 
1454 /*
1455 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1456 % %
1457 % %
1458 % %
1459 % I s P a t h A c c e s s i b l e %
1460 % %
1461 % %
1462 % %
1463 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1464 %
1465 % IsPathAccessible() returns MagickTrue if the file as defined by the path is
1466 % accessible.
1467 %
1468 % The format of the IsPathAccessible method is:
1469 %
1470 % MagickBooleanType IsPathAccessible(const char *path)
1471 %
1472 % A description of each parameter follows.
1473 %
1474 % o path: Specifies a path to a file.
1475 %
1476 */
1478 {
1480  status;
1481 
1482  struct stat
1483  attributes;
1484 
1485  if ((path == (const char *) NULL) || (*path == '\0'))
1486  return(MagickFalse);
1487  if (LocaleCompare(path,"-") == 0)
1488  return(MagickTrue);
1489  status=GetPathAttributes(path,&attributes);
1490  if (status == MagickFalse)
1491  return(status);
1492  if (S_ISREG(attributes.st_mode) == 0)
1493  return(MagickFalse);
1494  if (access_utf8(path,F_OK) != 0)
1495  return(MagickFalse);
1496  return(MagickTrue);
1497 }
1498 
1499 /*
1500 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1501 % %
1502 % %
1503 % %
1504 + I s P a t h D i r e c t o r y %
1505 % %
1506 % %
1507 % %
1508 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1509 %
1510 % IsPathDirectory() returns -1 if the directory does not exist, 1 is returned
1511 % if the path represents a directory otherwise 0.
1512 %
1513 % The format of the IsPathDirectory method is:
1514 %
1515 % int IsPathDirectory(const char *path)
1516 %
1517 % A description of each parameter follows.
1518 %
1519 % o path: The directory path.
1520 %
1521 */
1522 static int IsPathDirectory(const char *path)
1523 {
1525  status;
1526 
1527  struct stat
1528  attributes;
1529 
1530  if ((path == (const char *) NULL) || (*path == '\0'))
1531  return(MagickFalse);
1532  status=GetPathAttributes(path,&attributes);
1533  if (status == MagickFalse)
1534  return(-1);
1535  if (S_ISDIR(attributes.st_mode) == 0)
1536  return(0);
1537  return(1);
1538 }
1539 
1540 /*
1541 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1542 % %
1543 % %
1544 % %
1545 % L i s t F i l e s %
1546 % %
1547 % %
1548 % %
1549 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1550 %
1551 % ListFiles() reads the directory specified and returns a list of filenames
1552 % contained in the directory sorted in ascending alphabetic order.
1553 %
1554 % The format of the ListFiles function is:
1555 %
1556 % char **ListFiles(const char *directory,const char *pattern,
1557 % ssize_t *number_entries)
1558 %
1559 % A description of each parameter follows:
1560 %
1561 % o filelist: Method ListFiles returns a list of filenames contained
1562 % in the directory. If the directory specified cannot be read or it is
1563 % a file a NULL list is returned.
1564 %
1565 % o directory: Specifies a pointer to a text string containing a directory
1566 % name.
1567 %
1568 % o pattern: Specifies a pointer to a text string containing a pattern.
1569 %
1570 % o number_entries: This integer returns the number of filenames in the
1571 % list.
1572 %
1573 */
1574 
1575 #if defined(__cplusplus) || defined(c_plusplus)
1576 extern "C" {
1577 #endif
1578 
1579 static int FileCompare(const void *x,const void *y)
1580 {
1581  register const char
1582  **p,
1583  **q;
1584 
1585  p=(const char **) x;
1586  q=(const char **) y;
1587  return(LocaleCompare(*p,*q));
1588 }
1589 
1590 #if defined(__cplusplus) || defined(c_plusplus)
1591 }
1592 #endif
1593 
1594 MagickPrivate char **ListFiles(const char *directory,const char *pattern,
1595  size_t *number_entries)
1596 {
1597  char
1598  **filelist;
1599 
1600  DIR
1601  *current_directory;
1602 
1603  struct dirent
1604  *buffer,
1605  *entry;
1606 
1607  size_t
1608  max_entries;
1609 
1610  /*
1611  Open directory.
1612  */
1613  assert(directory != (const char *) NULL);
1614  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",directory);
1615  assert(pattern != (const char *) NULL);
1616  assert(number_entries != (size_t *) NULL);
1617  *number_entries=0;
1618  current_directory=opendir(directory);
1619  if (current_directory == (DIR *) NULL)
1620  return((char **) NULL);
1621  /*
1622  Allocate filelist.
1623  */
1624  max_entries=2048;
1625  filelist=(char **) AcquireQuantumMemory((size_t) max_entries,
1626  sizeof(*filelist));
1627  if (filelist == (char **) NULL)
1628  {
1629  (void) closedir(current_directory);
1630  return((char **) NULL);
1631  }
1632  /*
1633  Save the current and change to the new directory.
1634  */
1635  buffer=(struct dirent *) AcquireMagickMemory(sizeof(*buffer)+FILENAME_MAX+1);
1636  if (buffer == (struct dirent *) NULL)
1637  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1638  while ((MagickReadDirectory(current_directory,buffer,&entry) == 0) &&
1639  (entry != (struct dirent *) NULL))
1640  {
1641  if ((LocaleCompare(entry->d_name,".") == 0) ||
1642  (LocaleCompare(entry->d_name,"..") == 0))
1643  continue;
1644  if ((IsPathDirectory(entry->d_name) > 0) ||
1645 #if defined(MAGICKCORE_WINDOWS_SUPPORT)
1646  (GlobExpression(entry->d_name,pattern,MagickTrue) != MagickFalse))
1647 #else
1648  (GlobExpression(entry->d_name,pattern,MagickFalse) != MagickFalse))
1649 #endif
1650  {
1651  if (*number_entries >= max_entries)
1652  {
1653  /*
1654  Extend the file list.
1655  */
1656  max_entries<<=1;
1657  filelist=(char **) ResizeQuantumMemory(filelist,(size_t)
1658  max_entries,sizeof(*filelist));
1659  if (filelist == (char **) NULL)
1660  break;
1661  }
1662 #if defined(vms)
1663  {
1664  register char
1665  *p;
1666 
1667  p=strchr(entry->d_name,';');
1668  if (p)
1669  *p='\0';
1670  if (*number_entries > 0)
1671  if (LocaleCompare(entry->d_name,filelist[*number_entries-1]) == 0)
1672  continue;
1673  }
1674 #endif
1675  filelist[*number_entries]=(char *) AcquireString(entry->d_name);
1676  (*number_entries)++;
1677  }
1678  }
1679  buffer=(struct dirent *) RelinquishMagickMemory(buffer);
1680  (void) closedir(current_directory);
1681  if (filelist == (char **) NULL)
1682  return((char **) NULL);
1683  /*
1684  Sort filelist in ascending order.
1685  */
1686  qsort((void *) filelist,(size_t) *number_entries,sizeof(*filelist),
1687  FileCompare);
1688  return(filelist);
1689 }
1690 
1691 /*
1692 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1693 % %
1694 % %
1695 % %
1696 % M a g i c k D e l a y %
1697 % %
1698 % %
1699 % %
1700 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1701 %
1702 % MagickDelay() suspends program execution for the number of milliseconds
1703 % specified.
1704 %
1705 % The format of the Delay method is:
1706 %
1707 % void MagickDelay(const MagickSizeType milliseconds)
1708 %
1709 % A description of each parameter follows:
1710 %
1711 % o milliseconds: Specifies the number of milliseconds to delay before
1712 % returning.
1713 %
1714 */
1715 MagickExport void MagickDelay(const MagickSizeType milliseconds)
1716 {
1717  if (milliseconds == 0)
1718  return;
1719 #if defined(MAGICKCORE_HAVE_NANOSLEEP)
1720  {
1721  struct timespec
1722  timer;
1723 
1724  timer.tv_sec=(time_t) (milliseconds/1000);
1725  timer.tv_nsec=(milliseconds % 1000)*1000*1000;
1726  (void) nanosleep(&timer,(struct timespec *) NULL);
1727  }
1728 #elif defined(MAGICKCORE_HAVE_USLEEP)
1729  usleep(1000*milliseconds);
1730 #elif defined(MAGICKCORE_HAVE_SELECT)
1731  {
1732  struct timeval
1733  timer;
1734 
1735  timer.tv_sec=(long) milliseconds/1000;
1736  timer.tv_usec=(long) (milliseconds % 1000)*1000;
1737  (void) select(0,(XFD_SET *) NULL,(XFD_SET *) NULL,(XFD_SET *) NULL,&timer);
1738  }
1739 #elif defined(MAGICKCORE_HAVE_POLL)
1740  (void) poll((struct pollfd *) NULL,0,(int) milliseconds);
1741 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
1742  Sleep((long) milliseconds);
1743 #elif defined(vms)
1744  {
1745  float
1746  timer;
1747 
1748  timer=milliseconds/1000.0;
1749  lib$wait(&timer);
1750  }
1751 #elif defined(__BEOS__)
1752  snooze(1000*milliseconds);
1753 #else
1754  {
1755  clock_t
1756  time_end;
1757 
1758  time_end=clock()+milliseconds*CLOCKS_PER_SEC/1000;
1759  while (clock() < time_end)
1760  {
1761  }
1762  }
1763 #endif
1764 }
1765 
1766 /*
1767 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1768 % %
1769 % %
1770 % %
1771 % M u l t i l i n e C e n s u s %
1772 % %
1773 % %
1774 % %
1775 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1776 %
1777 % MultilineCensus() returns the number of lines within a label. A line is
1778 % represented by a \n character.
1779 %
1780 % The format of the MultilineCenus method is:
1781 %
1782 % size_t MultilineCensus(const char *label)
1783 %
1784 % A description of each parameter follows.
1785 %
1786 % o label: This character string is the label.
1787 %
1788 */
1789 MagickExport size_t MultilineCensus(const char *label)
1790 {
1791  size_t
1792  number_lines;
1793 
1794  /*
1795  Determine the number of lines within this label.
1796  */
1797  if (label == (char *) NULL)
1798  return(0);
1799  for (number_lines=1; *label != '\0'; label++)
1800  if (*label == '\n')
1801  number_lines++;
1802  return(number_lines);
1803 }
1804 
1805 /*
1806 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1807 % %
1808 % %
1809 % %
1810 % S h r e d F i l e %
1811 % %
1812 % %
1813 % %
1814 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1815 %
1816 % ShredFile() overwrites the specified file with zeros or random data and then
1817 % removes it. The overwrite is optional and is only required to help keep
1818 % the contents of the file private. On the first pass, the file is zeroed.
1819 % For subsequent passes, random data is written.
1820 %
1821 % The format of the ShredFile method is:
1822 %
1823 % MagickBooleanType ShredFile(const char *path)
1824 %
1825 % A description of each parameter follows.
1826 %
1827 % o path: Specifies a path to a file.
1828 %
1829 */
1831 {
1832  char
1833  *passes;
1834 
1835  int
1836  file,
1837  status;
1838 
1840  length;
1841 
1842  register ssize_t
1843  i;
1844 
1845  size_t
1846  quantum;
1847 
1848  struct stat
1849  file_stats;
1850 
1851  if ((path == (const char *) NULL) || (*path == '\0'))
1852  return(MagickFalse);
1853  passes=GetPolicyValue("system:shred");
1854  if (passes == (char *) NULL)
1855  passes=GetEnvironmentValue("MAGICK_SHRED_PASSES");
1856  if (passes == (char *) NULL)
1857  {
1858  /*
1859  Don't shred the file, just remove it.
1860  */
1861  status=remove_utf8(path);
1862  if (status == -1)
1863  {
1865  "Failed to remove: %s",path);
1866  return(MagickFalse);
1867  }
1868  return(MagickTrue);
1869  }
1870  file=open_utf8(path,O_WRONLY | O_EXCL | O_BINARY,S_MODE);
1871  if (file == -1)
1872  {
1873  /*
1874  Don't shred the file, just remove it.
1875  */
1876  passes=DestroyString(passes);
1877  status=remove_utf8(path);
1878  if (status == -1)
1880  "Failed to remove: %s",path);
1881  return(MagickFalse);
1882  }
1883  /*
1884  Shred the file.
1885  */
1886  quantum=(size_t) MagickMaxBufferExtent;
1887  if ((fstat(file,&file_stats) == 0) && (file_stats.st_size > 0))
1888  quantum=(size_t) MagickMin(file_stats.st_size,MagickMaxBufferExtent);
1889  length=(MagickSizeType) file_stats.st_size;
1890  for (i=0; i < (ssize_t) StringToInteger(passes); i++)
1891  {
1892  RandomInfo
1893  *random_info;
1894 
1895  register MagickOffsetType
1896  j;
1897 
1898  ssize_t
1899  count;
1900 
1901  if (lseek(file,0,SEEK_SET) < 0)
1902  break;
1904  for (j=0; j < (MagickOffsetType) length; j+=count)
1905  {
1906  StringInfo
1907  *key;
1908 
1909  key=GetRandomKey(random_info,quantum);
1910  if (i == 0)
1911  ResetStringInfo(key); /* zero on first pass */
1912  count=write(file,GetStringInfoDatum(key),(size_t)
1913  MagickMin((MagickSizeType) quantum,length-j));
1914  key=DestroyStringInfo(key);
1915  if (count <= 0)
1916  {
1917  count=0;
1918  if (errno != EINTR)
1919  break;
1920  }
1921  }
1923  if (j < (MagickOffsetType) length)
1924  break;
1925  }
1926  status=close(file);
1927  status=remove_utf8(path);
1928  if (status != -1)
1929  status=StringToInteger(passes);
1930  passes=DestroyString(passes);
1931  return((status == -1 || i < (ssize_t) status) ? MagickFalse : MagickTrue);
1932 }
#define lib
Definition: vms.h:763
MagickExport MagickBooleanType GetPathAttributes(const char *path, void *attributes)
Definition: utility.c:1175
MagickPrivate MagickBooleanType ShredFile(const char *path)
Definition: utility.c:1830
MagickExport size_t ConcatenateMagickString(char *magick_restrict destination, const char *magick_restrict source, const size_t length)
Definition: string.c:392
static const char Base64[]
Definition: utility.c:80
char d_name[255]
Definition: vms.h:944
#define IsBasenameSeparator(c)
Definition: studio.h:271
MagickExport ssize_t ParseCommandOption(const CommandOption option, const MagickBooleanType list, const char *options)
Definition: option.c:2989
#define ThrowFatalException(severity, tag)
static int StringToInteger(const char *magick_restrict value)
MagickPrivate char ** ListFiles(const char *directory, const char *pattern, size_t *number_entries)
Definition: utility.c:1594
#define MagickMaxBufferExtent
Definition: blob.h:25
#define S_ISDIR(mode)
Definition: studio.h:202
MagickPrivate MagickBooleanType IsMagickConflict(const char *)
MagickExport ExceptionInfo * AcquireExceptionInfo(void)
Definition: exception.c:115
MagickExport ssize_t FormatLocaleString(char *magick_restrict string, const size_t length, const char *magick_restrict format,...)
Definition: locale.c:467
MagickExport size_t CopyMagickString(char *magick_restrict destination, const char *magick_restrict source, const size_t length)
Definition: string.c:719
static void getcwd_utf8(char *path, size_t extent)
MagickPrivate void ExpandFilename(char *path)
Definition: utility.c:616
MagickExport void * ResizeQuantumMemory(void *memory, const size_t count, const size_t quantum)
Definition: memory.c:1420
#define O_BINARY
Definition: studio.h:333
Definition: vms.h:941
MagickExport MagickBooleanType AcquireUniqueFilename(char *path)
Definition: utility.c:111
DIR * opendir(char *)
Definition: log.h:52
MagickExport char * FileToString(const char *filename, const size_t extent, ExceptionInfo *exception)
Definition: string.c:953
ssize_t MagickOffsetType
Definition: magick-type.h:137
static int stat_utf8(const char *path, struct stat *attributes)
MagickExport RandomInfo * DestroyRandomInfo(RandomInfo *random_info)
Definition: random.c:274
static int IsPathDirectory(const char *)
Definition: utility.c:1522
MagickExport unsigned char * GetStringInfoDatum(const StringInfo *string_info)
Definition: string.c:1168
MagickExport size_t MultilineCensus(const char *label)
Definition: utility.c:1789
MagickExport MagickBooleanType IsGeometry(const char *geometry)
Definition: geometry.c:612
MagickExport void GetPathComponent(const char *path, PathType type, char *component)
Definition: utility.c:1223
MagickBooleanType
Definition: magick-type.h:173
#define DirectorySeparator
Definition: studio.h:267
MagickExport char * AcquireString(const char *source)
Definition: string.c:94
MagickExport int AcquireUniqueFileResource(char *path)
Definition: resource.c:551
MagickExport MagickBooleanType GlobExpression(const char *magick_restrict expression, const char *magick_restrict pattern, const MagickBooleanType case_insensitive)
Definition: token.c:355
static int remove_utf8(const char *path)
MagickExport StringInfo * DestroyStringInfo(StringInfo *string_info)
Definition: string.c:803
MagickExport void ResetStringInfo(StringInfo *string_info)
Definition: string.c:1545
MagickExport unsigned char * Base64Decode(const char *source, size_t *length)
Definition: utility.c:346
MagickExport void * AcquireQuantumMemory(const size_t count, const size_t quantum)
Definition: memory.c:638
Definition: vms.h:950
MagickExport MagickBooleanType RelinquishUniqueFileResource(const char *path)
Definition: resource.c:1098
MagickExport char * Base64Encode(const unsigned char *blob, const size_t blob_length, size_t *encode_length)
Definition: utility.c:501
MagickPrivate MagickBooleanType IsGlob(const char *) magick_attribute((__pure__))
Definition: token.c:600
size_t MagickSizeType
Definition: magick-type.h:138
#define MagickPathExtent
MagickExport void MagickDelay(const MagickSizeType milliseconds)
Definition: utility.c:1715
MagickExport MagickBooleanType IsEventLogging(void)
Definition: log.c:725
PathType
Definition: utility.h:25
MagickPrivate MagickBooleanType GetExecutionPath(char *path, const size_t extent)
Definition: utility.c:1005
MagickExport MagickBooleanType LogMagickEvent(const LogEventType type, const char *module, const char *function, const size_t line, const char *format,...)
Definition: log.c:1660
MagickExport MagickBooleanType IsPathAccessible(const char *path)
Definition: utility.c:1477
static int open_utf8(const char *path, int flags, mode_t mode)
MagickExport RandomInfo * AcquireRandomInfo(void)
Definition: random.c:163
MagickExport MagickBooleanType AcquireUniqueSymbolicLink(const char *source, char *destination)
Definition: utility.c:153
MagickExport char * GetEnvironmentValue(const char *name)
Definition: string.c:1135
#define S_MODE
Definition: studio.h:247
MagickPrivate char ** GetPathComponents(const char *path, size_t *number_components)
Definition: utility.c:1414
#define PATH_MAX
Definition: studio.h:337
MagickExport void AppendImageFormat(const char *format, char *filename)
Definition: utility.c:281
MagickExport int LocaleCompare(const char *p, const char *q)
Definition: locale.c:1403
#define GetMagickModule()
Definition: log.h:28
void closedir(DIR *)
MagickExport MagickBooleanType ExpandFilenames(int *number_arguments, char ***arguments)
Definition: utility.c:747
MagickExport char * DestroyString(char *string)
Definition: string.c:776
MagickExport void * AcquireMagickMemory(const size_t size)
Definition: memory.c:525
MagickPrivate ssize_t GetMagickPageSize(void)
Definition: utility.c:1134
static int access_utf8(const char *path, int mode)
static int MagickReadDirectory(DIR *directory, struct dirent *entry, struct dirent **result)
#define MagickMin(x, y)
Definition: image-private.h:37
MagickExport char * GetPolicyValue(const char *name)
Definition: policy.c:530
MagickExport MagickBooleanType ConcatenateString(char **magick_restrict destination, const char *magick_restrict source)
Definition: string.c:458
static RandomInfo * random_info
Definition: resource.c:113
MagickExport void * RelinquishMagickMemory(void *memory)
Definition: memory.c:1135
MagickPrivate void ChopPathComponents(char *path, const size_t components)
Definition: utility.c:584
#define CLOCKS_PER_SEC
Definition: timer.c:59
static int FileCompare(const void *x, const void *y)
Definition: utility.c:1579
#define MagickPrivate
#define MagickExport
MagickExport StringInfo * GetRandomKey(RandomInfo *random_info, const size_t length)
Definition: random.c:682
MagickExport char ** StringToArgv(const char *text, int *argc)
Definition: string.c:1975
MagickExport MagickBooleanType IsSceneGeometry(const char *geometry, const MagickBooleanType pedantic)
Definition: geometry.c:653
MagickExport char * ConstantString(const char *source)
Definition: string.c:666
MagickExport ExceptionInfo * DestroyExceptionInfo(ExceptionInfo *exception)
Definition: exception.c:418
#define S_ISREG(mode)
Definition: studio.h:205