MagickCore 7.1.1
Convert, Edit, Or Compose Bitmap Images
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utility.c
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 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*/
79static const char
80 Base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
81␌
82/*
83 Forward declaration.
84*/
85static 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*/
111MagickExport 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% RelinquishUniqueFileResource() 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
153MagickExport 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 passes=GetPolicyValue("system:shred");
184 if (passes != (char *) NULL)
185 passes=DestroyString(passes);
186 else
187 {
188 (void) AcquireUniqueFilename(destination);
189 (void) RelinquishUniqueFileResource(destination);
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*/
281MagickExport 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 if (IsEventLogging() != MagickFalse)
290 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
291 if ((*format == '\0') || (*filename == '\0'))
292 return;
293 if (LocaleCompare(filename,"-") == 0)
294 {
295 char
296 message[MagickPathExtent];
297
298 (void) FormatLocaleString(message,MagickPathExtent,"%s:%s",format,
299 filename);
300 (void) CopyMagickString(filename,message,MagickPathExtent);
301 return;
302 }
303 GetPathComponent(filename,ExtensionPath,extension);
304 if ((LocaleCompare(extension,"Z") == 0) ||
305 (LocaleCompare(extension,"bz2") == 0) ||
306 (LocaleCompare(extension,"gz") == 0) ||
307 (LocaleCompare(extension,"wmz") == 0) ||
308 (LocaleCompare(extension,"svgz") == 0))
309 {
310 GetPathComponent(filename,RootPath,root);
311 (void) CopyMagickString(filename,root,MagickPathExtent);
312 GetPathComponent(filename,RootPath,root);
313 (void) FormatLocaleString(filename,MagickPathExtent,"%s.%s.%s",root,
314 format,extension);
315 return;
316 }
317 GetPathComponent(filename,RootPath,root);
318 (void) FormatLocaleString(filename,MagickPathExtent,"%s.%s",root,format);
319}
320␌
321/*
322%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
323% %
324% %
325% %
326% B a s e 6 4 D e c o d e %
327% %
328% %
329% %
330%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
331%
332% Base64Decode() decodes Base64-encoded text and returns its binary
333% equivalent. NULL is returned if the text is not valid Base64 data, or a
334% memory allocation failure occurs.
335%
336% The format of the Base64Decode method is:
337%
338% unsigned char *Base64Decode(const char *source,length_t *length)
339%
340% A description of each parameter follows:
341%
342% o source: A pointer to a Base64-encoded string.
343%
344% o length: the number of bytes decoded.
345%
346*/
347MagickExport unsigned char *Base64Decode(const char *source,size_t *length)
348{
349 int
350 state;
351
352 const char
353 *p,
354 *q;
355
356 size_t
357 i;
358
359 unsigned char
360 *decode;
361
362 assert(source != (char *) NULL);
363 assert(length != (size_t *) NULL);
364 if (IsEventLogging() != MagickFalse)
365 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
366 *length=0;
367 decode=(unsigned char *) AcquireQuantumMemory((strlen(source)+3)/4,
368 3*sizeof(*decode));
369 if (decode == (unsigned char *) NULL)
370 return((unsigned char *) NULL);
371 i=0;
372 state=0;
373 for (p=source; *p != '\0'; p++)
374 {
375 if (isspace((int) ((unsigned char) *p)) != 0)
376 continue;
377 if (*p == '=')
378 break;
379 q=strchr(Base64,*p);
380 if (q == (char *) NULL)
381 {
382 decode=(unsigned char *) RelinquishMagickMemory(decode);
383 return((unsigned char *) NULL); /* non-Base64 character */
384 }
385 switch (state)
386 {
387 case 0:
388 {
389 decode[i]=(q-Base64) << 2;
390 state++;
391 break;
392 }
393 case 1:
394 {
395 decode[i++]|=(q-Base64) >> 4;
396 decode[i]=((q-Base64) & 0x0f) << 4;
397 state++;
398 break;
399 }
400 case 2:
401 {
402 decode[i++]|=(q-Base64) >> 2;
403 decode[i]=((q-Base64) & 0x03) << 6;
404 state++;
405 break;
406 }
407 case 3:
408 {
409 decode[i++]|=(q-Base64);
410 state=0;
411 break;
412 }
413 }
414 }
415 /*
416 Verify Base-64 string has proper terminal characters.
417 */
418 if (*p != '=')
419 {
420 if (state != 0)
421 {
422 decode=(unsigned char *) RelinquishMagickMemory(decode);
423 return((unsigned char *) NULL);
424 }
425 }
426 else
427 {
428 p++;
429 switch (state)
430 {
431 case 0:
432 case 1:
433 {
434 /*
435 Unrecognized '=' character.
436 */
437 decode=(unsigned char *) RelinquishMagickMemory(decode);
438 return((unsigned char *) NULL);
439 }
440 case 2:
441 {
442 for ( ; *p != '\0'; p++)
443 if (isspace((int) ((unsigned char) *p)) == 0)
444 break;
445 if (*p != '=')
446 {
447 decode=(unsigned char *) RelinquishMagickMemory(decode);
448 return((unsigned char *) NULL);
449 }
450 p++;
451 }
452 case 3:
453 {
454 for ( ; *p != '\0'; p++)
455 if (isspace((int) ((unsigned char) *p)) == 0)
456 {
457 decode=(unsigned char *) RelinquishMagickMemory(decode);
458 return((unsigned char *) NULL);
459 }
460 if ((int) decode[i] != 0)
461 {
462 decode=(unsigned char *) RelinquishMagickMemory(decode);
463 return((unsigned char *) NULL);
464 }
465 break;
466 }
467 }
468 }
469 *length=i;
470 return(decode);
471}
472␌
473/*
474%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
475% %
476% %
477% %
478% B a s e 6 4 E n c o d e %
479% %
480% %
481% %
482%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
483%
484% Base64Encode() encodes arbitrary binary data to Base64 encoded format as
485% described by the "Base64 Content-Transfer-Encoding" section of RFC 2045 and
486% returns the result as a null-terminated ASCII string. NULL is returned if
487% a memory allocation failure occurs.
488%
489% The format of the Base64Encode method is:
490%
491% char *Base64Encode(const unsigned char *blob,const size_t blob_length,
492% size_t *encode_length)
493%
494% A description of each parameter follows:
495%
496% o blob: A pointer to binary data to encode.
497%
498% o blob_length: the number of bytes to encode.
499%
500% o encode_length: The number of bytes encoded.
501%
502*/
503MagickExport char *Base64Encode(const unsigned char *blob,
504 const size_t blob_length,size_t *encode_length)
505{
506 char
507 *encode;
508
509 const unsigned char
510 *p;
511
512 size_t
513 i;
514
515 size_t
516 remainder;
517
518 assert(blob != (const unsigned char *) NULL);
519 assert(blob_length != 0);
520 assert(encode_length != (size_t *) NULL);
521 if (IsEventLogging() != MagickFalse)
522 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
523 *encode_length=0;
524 encode=(char *) AcquireQuantumMemory(blob_length/3+4,4*sizeof(*encode));
525 if (encode == (char *) NULL)
526 return((char *) NULL);
527 i=0;
528 for (p=blob; p < (blob+blob_length-2); p+=(ptrdiff_t) 3)
529 {
530 encode[i++]=Base64[(int) (*p >> 2)];
531 encode[i++]=Base64[(int) (((*p & 0x03) << 4)+(*(p+1) >> 4))];
532 encode[i++]=Base64[(int) (((*(p+1) & 0x0f) << 2)+(*(p+2) >> 6))];
533 encode[i++]=Base64[(int) (*(p+2) & 0x3f)];
534 }
535 remainder=blob_length % 3;
536 if (remainder != 0)
537 {
538 ssize_t
539 j;
540
541 unsigned char
542 code[3];
543
544 code[0]='\0';
545 code[1]='\0';
546 code[2]='\0';
547 for (j=0; j < (ssize_t) remainder; j++)
548 code[j]=(*p++);
549 encode[i++]=Base64[(int) (code[0] >> 2)];
550 encode[i++]=Base64[(int) (((code[0] & 0x03) << 4)+(code[1] >> 4))];
551 if (remainder == 1)
552 encode[i++]='=';
553 else
554 encode[i++]=Base64[(int) (((code[1] & 0x0f) << 2)+(code[2] >> 6))];
555 encode[i++]='=';
556 }
557 *encode_length=i;
558 encode[i++]='\0';
559 return(encode);
560}
561␌
562/*
563%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
564% %
565% %
566% %
567% C h o p P a t h C o m p o n e n t s %
568% %
569% %
570% %
571%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
572%
573% ChopPathComponents() removes the number of specified file components from a
574% path.
575%
576% The format of the ChopPathComponents method is:
577%
578% ChopPathComponents(char *path,size_t components)
579%
580% A description of each parameter follows:
581%
582% o path: The path.
583%
584% o components: The number of components to chop.
585%
586*/
587MagickPrivate void ChopPathComponents(char *path,const size_t components)
588{
589 ssize_t
590 i;
591
592 for (i=0; i < (ssize_t) components; i++)
593 GetPathComponent(path,HeadPath,path);
594}
595␌
596/*
597%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
598% %
599% %
600% %
601% E x p a n d F i l e n a m e %
602% %
603% %
604% %
605%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
606%
607% ExpandFilename() expands '~' in a path.
608%
609% The format of the ExpandFilename function is:
610%
611% ExpandFilename(char *path)
612%
613% A description of each parameter follows:
614%
615% o path: Specifies a pointer to a character array that contains the
616% path.
617%
618*/
619MagickPrivate void ExpandFilename(char *path)
620{
621 char
622 expand_path[MagickPathExtent];
623
624 if (path == (char *) NULL)
625 return;
626 if (*path != '~')
627 return;
628 (void) CopyMagickString(expand_path,path,MagickPathExtent);
629 if ((*(path+1) == *DirectorySeparator) || (*(path+1) == '\0'))
630 {
631 char
632 *home;
633
634 /*
635 Substitute ~ with $HOME.
636 */
637 (void) CopyMagickString(expand_path,".",MagickPathExtent);
638 (void) ConcatenateMagickString(expand_path,path+1,MagickPathExtent);
639 home=GetEnvironmentValue("HOME");
640 if (home == (char *) NULL)
641 home=GetEnvironmentValue("USERPROFILE");
642 if (home != (char *) NULL)
643 {
644 (void) CopyMagickString(expand_path,home,MagickPathExtent);
645 (void) ConcatenateMagickString(expand_path,path+1,MagickPathExtent);
646 home=DestroyString(home);
647 }
648 }
649 else
650 {
651#if defined(MAGICKCORE_POSIX_SUPPORT) && !defined(__OS2__)
652 char
653#if defined(MAGICKCORE_HAVE_GETPWNAM_R)
654 buffer[MagickPathExtent],
655#endif
656 username[MagickPathExtent];
657
658 char
659 *p;
660
661 struct passwd
662 *entry,
663 pwd;
664
665 /*
666 Substitute ~ with home directory from password file.
667 */
668 (void) CopyMagickString(username,path+1,MagickPathExtent);
669 p=strchr(username,'/');
670 if (p != (char *) NULL)
671 *p='\0';
672#if !defined(MAGICKCORE_HAVE_GETPWNAM_R)
673 entry=getpwnam(username);
674#else
675 entry=(struct passwd *) NULL;
676 if (getpwnam_r(username,&pwd,buffer,sizeof(buffer),&entry) < 0)
677 return;
678#endif
679 if (entry == (struct passwd *) NULL)
680 return;
681 (void) CopyMagickString(expand_path,entry->pw_dir,MagickPathExtent);
682 if (p != (char *) NULL)
683 {
684 (void) ConcatenateMagickString(expand_path,"/",MagickPathExtent);
685 (void) ConcatenateMagickString(expand_path,p+1,MagickPathExtent);
686 }
687#endif
688 }
689 (void) CopyMagickString(path,expand_path,MagickPathExtent);
690}
691␌
692/*
693%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
694% %
695% %
696% %
697% E x p a n d F i l e n a m e s %
698% %
699% %
700% %
701%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
702%
703% ExpandFilenames() checks each argument of the given argument array, and
704% expands it if they have a wildcard character.
705%
706% Any coder prefix (EG: 'coder:filename') or read modifier postfix (EG:
707% 'filename[...]') are ignored during the file the expansion, but will be
708% included in the final argument. If no filename matching the meta-character
709% 'glob' is found the original argument is returned.
710%
711% For example, an argument of '*.gif[20x20]' will be replaced by the list
712% 'abc.gif[20x20]', 'foobar.gif[20x20]', 'xyzzy.gif[20x20]'
713% if such filenames exist, (in the current directory in this case).
714%
715% Meta-characters handled...
716% @ read a list of filenames (no further expansion performed)
717% ~ At start of filename expands to HOME environment variable
718% * matches any string including an empty string
719% ? matches by any single character
720%
721% WARNING: filenames starting with '.' (hidden files in a UNIX file system)
722% will never be expanded. Attempting to expand '.*' will produce no change.
723%
724% Expansion is ignored for coders "label:" "caption:" "pango:" and "vid:".
725% Which provide their own '@' meta-character handling.
726%
727% You can see the results of the expansion using "Configure" log events.
728%
729% The returned list should be freed using DestroyStringList().
730%
731% However the strings in the original pointed to argv are not
732% freed (TO BE CHECKED). So a copy of the original pointer (and count)
733% should be kept separate if they need to be freed later.
734%
735% The format of the ExpandFilenames function is:
736%
737% status=ExpandFilenames(int *number_arguments,char ***arguments)
738%
739% A description of each parameter follows:
740%
741% o number_arguments: Specifies a pointer to an integer describing the
742% number of elements in the argument vector.
743%
744% o arguments: Specifies a pointer to a text array containing the command
745% line arguments.
746%
747*/
748MagickExport MagickBooleanType ExpandFilenames(int *number_arguments,
749 char ***arguments)
750{
751 char
752 home_directory[MagickPathExtent],
753 **vector;
754
755 ssize_t
756 i,
757 j;
758
759 size_t
760 number_files;
761
762 ssize_t
763 count,
764 parameters;
765
766 /*
767 Allocate argument vector.
768 */
769 assert(number_arguments != (int *) NULL);
770 assert(arguments != (char ***) NULL);
771 if (IsEventLogging() != MagickFalse)
772 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
773 vector=(char **) AcquireQuantumMemory((size_t) (*number_arguments+1),
774 sizeof(*vector));
775 if (vector == (char **) NULL)
776 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
777 /*
778 Expand any wildcard filenames.
779 */
780 *home_directory='\0';
781 count=0;
782 for (i=0; i < (ssize_t) *number_arguments; i++)
783 {
784 char
785 **filelist,
786 filename[MagickPathExtent],
787 magick[MagickPathExtent],
788 *option,
789 path[MagickPathExtent],
790 subimage[MagickPathExtent];
791
792 MagickBooleanType
793 destroy;
794
795 option=(*arguments)[i];
796 *magick='\0';
797 *path='\0';
798 *filename='\0';
799 *subimage='\0';
800 number_files=0;
801 vector[count++]=ConstantString(option);
802 destroy=MagickTrue;
803 parameters=ParseCommandOption(MagickCommandOptions,MagickFalse,option);
804 if (parameters > 0)
805 {
806 /*
807 Do not expand command option parameters.
808 */
809 for (j=0; j < parameters; j++)
810 {
811 i++;
812 if (i == (ssize_t) *number_arguments)
813 break;
814 option=(*arguments)[i];
815 vector[count++]=ConstantString(option);
816 }
817 continue;
818 }
819 if ((*option == '"') || (*option == '\''))
820 continue;
821 GetPathComponent(option,TailPath,filename);
822 GetPathComponent(option,MagickPath,magick);
823 if ((LocaleCompare(magick,"CAPTION") == 0) ||
824 (LocaleCompare(magick,"LABEL") == 0) ||
825 (LocaleCompare(magick,"PANGO") == 0) ||
826 (LocaleCompare(magick,"VID") == 0))
827 continue;
828 if ((IsGlob(filename) == MagickFalse) && (*option != '@'))
829 continue;
830 if (IsPathAccessible(option) != MagickFalse)
831 continue;
832 if (*option != '@')
833 {
834 /*
835 Generate file list from wildcard filename (e.g. *.jpg).
836 */
837 GetPathComponent(option,HeadPath,path);
838 GetPathComponent(option,SubimagePath,subimage);
839 ExpandFilename(path);
840 if (*home_directory == '\0')
841 getcwd_utf8(home_directory,MagickPathExtent-1);
842 filelist=ListFiles(*path == '\0' ? home_directory : path,filename,
843 &number_files);
844 }
845 else
846 {
847 char
848 *files;
849
850 ExceptionInfo
851 *exception;
852
853 int
854 length;
855
856 /*
857 Generate file list from file list (e.g. @filelist.txt).
858 */
859 exception=AcquireExceptionInfo();
860 files=FileToString(option,~0UL,exception);
861 exception=DestroyExceptionInfo(exception);
862 if (files == (char *) NULL)
863 continue;
864 filelist=StringToArgv(files,&length);
865 if (filelist == (char **) NULL)
866 continue;
867 files=DestroyString(files);
868 filelist[0]=DestroyString(filelist[0]);
869 for (j=0; j < (ssize_t) (length-1); j++)
870 filelist[j]=filelist[j+1];
871 number_files=(size_t) length-1;
872 }
873 if (filelist == (char **) NULL)
874 continue;
875 for (j=0; j < (ssize_t) number_files; j++)
876 if (IsPathDirectory(filelist[j]) <= 0)
877 break;
878 if (j == (ssize_t) number_files)
879 {
880 for (j=0; j < (ssize_t) number_files; j++)
881 filelist[j]=DestroyString(filelist[j]);
882 filelist=(char **) RelinquishMagickMemory(filelist);
883 continue;
884 }
885 /*
886 Transfer file list to argument vector.
887 */
888 vector=(char **) ResizeQuantumMemory(vector,(size_t) ((ssize_t)
889 *number_arguments+count+(ssize_t) number_files+1),sizeof(*vector));
890 if (vector == (char **) NULL)
891 {
892 for (j=0; j < (ssize_t) number_files; j++)
893 filelist[j]=DestroyString(filelist[j]);
894 filelist=(char **) RelinquishMagickMemory(filelist);
895 return(MagickFalse);
896 }
897 for (j=0; j < (ssize_t) number_files; j++)
898 {
899 option=filelist[j];
900 parameters=ParseCommandOption(MagickCommandOptions,MagickFalse,option);
901 if (parameters > 0)
902 {
903 ssize_t
904 k;
905
906 /*
907 Do not expand command option parameters.
908 */
909 vector[count++]=ConstantString(option);
910 for (k=0; k < parameters; k++)
911 {
912 j++;
913 if (j == (ssize_t) number_files)
914 break;
915 option=filelist[j];
916 vector[count++]=ConstantString(option);
917 }
918 continue;
919 }
920 (void) CopyMagickString(filename,path,MagickPathExtent);
921 if (*path != '\0')
922 (void) ConcatenateMagickString(filename,DirectorySeparator,
923 MagickPathExtent);
924 if (filelist[j] != (char *) NULL)
925 (void) ConcatenateMagickString(filename,filelist[j],MagickPathExtent);
926 filelist[j]=DestroyString(filelist[j]);
927 if (strlen(filename) >= (MagickPathExtent-1))
928 ThrowFatalException(OptionFatalError,"FilenameTruncated");
929 if (IsPathDirectory(filename) <= 0)
930 {
931 char
932 file_path[MagickPathExtent];
933
934 *file_path='\0';
935 if (*magick != '\0')
936 {
937 (void) ConcatenateMagickString(file_path,magick,
938 MagickPathExtent);
939 (void) ConcatenateMagickString(file_path,":",MagickPathExtent);
940 }
941 (void) ConcatenateMagickString(file_path,filename,MagickPathExtent);
942 if (*subimage != '\0')
943 {
944 (void) ConcatenateMagickString(file_path,"[",MagickPathExtent);
945 (void) ConcatenateMagickString(file_path,subimage,
946 MagickPathExtent);
947 (void) ConcatenateMagickString(file_path,"]",MagickPathExtent);
948 }
949 if (strlen(file_path) >= (MagickPathExtent-1))
950 ThrowFatalException(OptionFatalError,"FilenameTruncated");
951 if (destroy != MagickFalse)
952 {
953 count--;
954 vector[count]=DestroyString(vector[count]);
955 destroy=MagickFalse;
956 }
957 vector[count++]=ConstantString(file_path);
958 }
959 }
960 filelist=(char **) RelinquishMagickMemory(filelist);
961 }
962 vector[count]=(char *) NULL;
963 if (IsEventLogging() != MagickFalse)
964 {
965 char
966 *command_line;
967
968 command_line=AcquireString(vector[0]);
969 for (i=1; i < count; i++)
970 {
971 (void) ConcatenateString(&command_line," {");
972 (void) ConcatenateString(&command_line,vector[i]);
973 (void) ConcatenateString(&command_line,"}");
974 }
975 (void) LogMagickEvent(ConfigureEvent,GetMagickModule(),
976 "Command line: %s",command_line);
977 command_line=DestroyString(command_line);
978 }
979 *number_arguments=(int) count;
980 *arguments=vector;
981 return(MagickTrue);
982}
983␌
984/*
985%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
986% %
987% %
988% %
989% G e t E x e c u t i o n P a t h %
990% %
991% %
992% %
993%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
994%
995% GetExecutionPath() returns the pathname of the executable that started
996% the process. On success MagickTrue is returned, otherwise MagickFalse.
997%
998% The format of the GetExecutionPath method is:
999%
1000% MagickBooleanType GetExecutionPath(char *path,const size_t extent)
1001%
1002% A description of each parameter follows:
1003%
1004% o path: the pathname of the executable that started the process.
1005%
1006% o extent: the maximum extent of the path.
1007%
1008*/
1009MagickPrivate MagickBooleanType GetExecutionPath(char *path,const size_t extent)
1010{
1011 char
1012 *directory;
1013
1014 *path='\0';
1015 directory=getcwd(path,(unsigned long) extent);
1016 (void) directory;
1017#if defined(MAGICKCORE_HAVE_GETPID) && defined(MAGICKCORE_HAVE_READLINK) && defined(PATH_MAX)
1018 {
1019 char
1020 execution_path[PATH_MAX+1],
1021 link_path[MagickPathExtent];
1022
1023 ssize_t
1024 count;
1025
1026 (void) FormatLocaleString(link_path,MagickPathExtent,"/proc/%.20g/exe",
1027 (double) getpid());
1028 count=readlink(link_path,execution_path,PATH_MAX);
1029 if (count == -1)
1030 {
1031 (void) FormatLocaleString(link_path,MagickPathExtent,"/proc/%.20g/file",
1032 (double) getpid());
1033 count=readlink(link_path,execution_path,PATH_MAX);
1034 }
1035 if ((count > 0) && (count <= (ssize_t) PATH_MAX))
1036 {
1037 execution_path[count]='\0';
1038 (void) CopyMagickString(path,execution_path,extent);
1039 }
1040 }
1041#endif
1042#if defined(MAGICKCORE_HAVE__NSGETEXECUTABLEPATH)
1043 {
1044 char
1045 executable_path[PATH_MAX << 1],
1046 execution_path[PATH_MAX+1];
1047
1048 uint32_t
1049 length;
1050
1051 length=sizeof(executable_path);
1052 if ((_NSGetExecutablePath(executable_path,&length) == 0) &&
1053 (realpath(executable_path,execution_path) != (char *) NULL))
1054 (void) CopyMagickString(path,execution_path,extent);
1055 }
1056#endif
1057#if defined(MAGICKCORE_HAVE_GETEXECNAME)
1058 {
1059 const char
1060 *execution_path;
1061
1062 execution_path=(const char *) getexecname();
1063 if (execution_path != (const char *) NULL)
1064 {
1065 if (*execution_path != *DirectorySeparator)
1066 (void) ConcatenateMagickString(path,DirectorySeparator,extent);
1067 (void) ConcatenateMagickString(path,execution_path,extent);
1068 }
1069 }
1070#endif
1071#if defined(MAGICKCORE_WINDOWS_SUPPORT)
1072 NTGetExecutionPath(path,extent);
1073#endif
1074#if defined(__GNU__)
1075 {
1076 char
1077 *program_name;
1078
1079 ssize_t
1080 count;
1081
1082 count=0;
1083 program_name=program_invocation_name;
1084 if (*program_invocation_name != '/')
1085 {
1086 size_t
1087 extent;
1088
1089 extent=strlen(directory)+strlen(program_name)+2;
1090 program_name=AcquireQuantumMemory(extent,sizeof(*program_name));
1091 if (program_name == (char *) NULL)
1092 program_name=program_invocation_name;
1093 else
1094 count=FormatLocaleString(program_name,extent,"%s/%s",directory,
1095 program_invocation_name);
1096 }
1097 if (count != -1)
1098 {
1099 char
1100 execution_path[PATH_MAX+1];
1101
1102 if (realpath(program_name,execution_path) != (char *) NULL)
1103 (void) CopyMagickString(path,execution_path,extent);
1104 }
1105 if (program_name != program_invocation_name)
1106 program_name=(char *) RelinquishMagickMemory(program_name);
1107 }
1108#endif
1109#if defined(__OpenBSD__)
1110 {
1111 extern char
1112 *__progname;
1113
1114 (void) CopyMagickString(path,__progname,extent);
1115 }
1116#endif
1117 return(IsPathAccessible(path));
1118}
1119␌
1120/*
1121%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1122% %
1123% %
1124% %
1125% G e t M a g i c k P a g e S i z e %
1126% %
1127% %
1128% %
1129%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1130%
1131% GetMagickPageSize() returns the memory page size.
1132%
1133% The format of the GetMagickPageSize method is:
1134%
1135% ssize_t GetMagickPageSize()
1136%
1137*/
1138MagickPrivate ssize_t GetMagickPageSize(void)
1139{
1140 static ssize_t
1141 page_size = -1;
1142
1143 if (page_size > 0)
1144 return(page_size);
1145#if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
1146 page_size=(ssize_t) sysconf(_SC_PAGE_SIZE);
1147#elif defined(MAGICKCORE_HAVE_GETPAGESIZE)
1148 page_size=(ssize_t) getpagesize();
1149#endif
1150 if (page_size <= 0)
1151 page_size=4096;
1152 return(page_size);
1153}
1154␌
1155/*
1156%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1157% %
1158% %
1159% %
1160% G e t P a t h A t t r i b u t e s %
1161% %
1162% %
1163% %
1164%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1165%
1166% GetPathAttributes() returns attributes (e.g. size of file) about a path.
1167%
1168% The path of the GetPathAttributes method is:
1169%
1170% MagickBooleanType GetPathAttributes(const char *path,void *attributes)
1171%
1172% A description of each parameter follows.
1173%
1174% o path: the file path.
1175%
1176% o attributes: the path attributes are returned here.
1177%
1178*/
1179MagickExport MagickBooleanType GetPathAttributes(const char *path,
1180 void *attributes)
1181{
1182 MagickBooleanType
1183 status;
1184
1185 if (path == (const char *) NULL)
1186 {
1187 errno=EINVAL;
1188 return(MagickFalse);
1189 }
1190 (void) memset(attributes,0,sizeof(struct stat));
1191 status=stat_utf8(path,(struct stat *) attributes) == 0 ? MagickTrue :
1192 MagickFalse;
1193 return(status);
1194}
1195␌
1196/*
1197%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1198% %
1199% %
1200% %
1201% G e t P a t h C o m p o n e n t %
1202% %
1203% %
1204% %
1205%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1206%
1207% GetPathComponent() returns the parent directory name, filename, basename, or
1208% extension of a file path.
1209%
1210% The component string pointed to must have at least MagickPathExtent space
1211% for the results to be stored.
1212%
1213% The format of the GetPathComponent function is:
1214%
1215% GetPathComponent(const char *path,PathType type,char *component)
1216%
1217% A description of each parameter follows:
1218%
1219% o path: Specifies a pointer to a character array that contains the
1220% file path.
1221%
1222% o type: Specifies which file path component to return.
1223%
1224% o component: the selected file path component is returned here.
1225%
1226*/
1227MagickExport void GetPathComponent(const char *path,PathType type,
1228 char *component)
1229{
1230 char
1231 *q;
1232
1233 char
1234 *p;
1235
1236 size_t
1237 magick_length,
1238 subimage_offset,
1239 subimage_length;
1240
1241 assert(path != (const char *) NULL);
1242 assert(component != (char *) NULL);
1243 if (IsEventLogging() != MagickFalse)
1244 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",path);
1245 if (*path == '\0')
1246 {
1247 *component='\0';
1248 return;
1249 }
1250 (void) CopyMagickString(component,path,MagickPathExtent);
1251 subimage_length=0;
1252 subimage_offset=0;
1253 if (type != SubcanonicalPath)
1254 {
1255 p=component+strlen(component)-1;
1256 if ((strlen(component) > 2) && (*p == ']'))
1257 {
1258 q=strrchr(component,'[');
1259 if ((q != (char *) NULL) && ((q == component) || (*(q-1) != ']')) &&
1260 (IsPathAccessible(path) == MagickFalse))
1261 {
1262 /*
1263 Look for scene specification (e.g. img0001.pcd[4]).
1264 */
1265 *p='\0';
1266 if ((IsSceneGeometry(q+1,MagickFalse) == MagickFalse) &&
1267 (IsGeometry(q+1) == MagickFalse))
1268 *p=']';
1269 else
1270 {
1271 subimage_length=(size_t) (p-q);
1272 subimage_offset=(size_t) (q-component+1);
1273 *q='\0';
1274 }
1275 }
1276 }
1277 }
1278 magick_length=0;
1279#if defined(__OS2__)
1280 if (path[1] != ":")
1281#endif
1282 for (p=component; *p != '\0'; p++)
1283 {
1284 if ((*p == '%') && (*(p+1) == '['))
1285 {
1286 /*
1287 Skip over %[...].
1288 */
1289 for (p++; (*p != ']') && (*p != '\0'); p++) ;
1290 if (*p == '\0')
1291 break;
1292 }
1293 if ((p != component) && (*p == ':') && (IsPathDirectory(component) < 0) &&
1294 (IsPathAccessible(component) == MagickFalse))
1295 {
1296 /*
1297 Look for image format specification (e.g. ps3:image).
1298 */
1299 *p='\0';
1300 if (IsMagickConflict(component) != MagickFalse)
1301 *p=':';
1302 else
1303 {
1304 magick_length=(size_t) (p-component+1);
1305 for (q=component; *(++p) != '\0'; q++)
1306 *q=(*p);
1307 *q='\0';
1308 }
1309 break;
1310 }
1311 }
1312 p=component;
1313 if (*p != '\0')
1314 for (p=component+strlen(component)-1; p > component; p--)
1315 if (IsBasenameSeparator(*p) != MagickFalse)
1316 break;
1317 switch (type)
1318 {
1319 case MagickPath:
1320 {
1321 if (magick_length != 0)
1322 (void) CopyMagickString(component,path,magick_length);
1323 else
1324 *component='\0';
1325 break;
1326 }
1327 case RootPath:
1328 {
1329 if (*component != '\0')
1330 {
1331 for (p=component+(strlen(component)-1); p > component; p--)
1332 {
1333 if (IsBasenameSeparator(*p) != MagickFalse)
1334 break;
1335 if (*p == '.')
1336 break;
1337 }
1338 if (*p == '.')
1339 *p='\0';
1340 break;
1341 }
1342 magick_fallthrough;
1343 }
1344 case HeadPath:
1345 {
1346 *p='\0';
1347 break;
1348 }
1349 case TailPath:
1350 {
1351 if (IsBasenameSeparator(*p) != MagickFalse)
1352 (void) CopyMagickString(component,p+1,MagickPathExtent);
1353 break;
1354 }
1355 case BasePath:
1356 {
1357 if (IsBasenameSeparator(*p) != MagickFalse)
1358 (void) CopyMagickString(component,p+1,MagickPathExtent);
1359 if (*component != '\0')
1360 for (p=component+(strlen(component)-1); p > component; p--)
1361 if (*p == '.')
1362 {
1363 *p='\0';
1364 break;
1365 }
1366 break;
1367 }
1368 case BasePathSansCompressExtension:
1369 {
1370 char
1371 extension[MagickPathExtent];
1372
1373 /*
1374 Base path sans any compression extension.
1375 */
1376 GetPathComponent(path,ExtensionPath,extension);
1377 if ((LocaleCompare(extension,"bz2") == 0) ||
1378 (LocaleCompare(extension,"gz") == 0) ||
1379 (LocaleCompare(extension,"svgz") == 0) ||
1380 (LocaleCompare(extension,"wmz") == 0) ||
1381 (LocaleCompare(extension,"Z") == 0))
1382 GetPathComponent(path,BasePath,component);
1383 break;
1384 }
1385 case ExtensionPath:
1386 {
1387 if (IsBasenameSeparator(*p) != MagickFalse)
1388 (void) CopyMagickString(component,p+1,MagickPathExtent);
1389 if (*component != '\0')
1390 for (p=component+strlen(component)-1; p > component; p--)
1391 if (*p == '.')
1392 break;
1393 *component='\0';
1394 if (*p == '.')
1395 (void) CopyMagickString(component,p+1,MagickPathExtent);
1396 break;
1397 }
1398 case SubimagePath:
1399 {
1400 *component='\0';
1401 if ((subimage_length != 0) && (magick_length < subimage_offset))
1402 (void) CopyMagickString(component,path+subimage_offset,subimage_length);
1403 break;
1404 }
1405 case SubcanonicalPath:
1406 case CanonicalPath:
1407 case UndefinedPath:
1408 break;
1409 }
1410}
1411␌
1412/*
1413%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1414% %
1415% %
1416% %
1417% G e t P a t h C o m p o n e n t s %
1418% %
1419% %
1420% %
1421%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1422%
1423% GetPathComponents() returns a list of path components.
1424%
1425% The format of the GetPathComponents method is:
1426%
1427% char **GetPathComponents(const char *path,
1428% size_t *number_components)
1429%
1430% A description of each parameter follows:
1431%
1432% o path: Specifies the string to segment into a list.
1433%
1434% o number_components: return the number of components in the list
1435%
1436*/
1437MagickPrivate char **GetPathComponents(const char *path,
1438 size_t *number_components)
1439{
1440 char
1441 **components;
1442
1443 const char
1444 *p,
1445 *q;
1446
1447 ssize_t
1448 i;
1449
1450 if (path == (char *) NULL)
1451 return((char **) NULL);
1452 *number_components=1;
1453 for (p=path; *p != '\0'; p++)
1454 if (IsBasenameSeparator(*p))
1455 (*number_components)++;
1456 components=(char **) AcquireQuantumMemory((size_t) *number_components+1UL,
1457 sizeof(*components));
1458 if (components == (char **) NULL)
1459 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1460 p=path;
1461 for (i=0; i < (ssize_t) *number_components; i++)
1462 {
1463 for (q=p; *q != '\0'; q++)
1464 if (IsBasenameSeparator(*q))
1465 break;
1466 components[i]=(char *) AcquireQuantumMemory((size_t) (q-p)+MagickPathExtent,
1467 sizeof(**components));
1468 if (components[i] == (char *) NULL)
1469 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1470 (void) CopyMagickString(components[i],p,(size_t) (q-p+1));
1471 p=q+1;
1472 }
1473 components[i]=(char *) NULL;
1474 return(components);
1475}
1476␌
1477/*
1478%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1479% %
1480% %
1481% %
1482% I s P a t h A c c e s s i b l e %
1483% %
1484% %
1485% %
1486%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1487%
1488% IsPathAccessible() returns MagickTrue if the file as defined by the path is
1489% accessible.
1490%
1491% The format of the IsPathAccessible method is:
1492%
1493% MagickBooleanType IsPathAccessible(const char *path)
1494%
1495% A description of each parameter follows.
1496%
1497% o path: Specifies a path to a file.
1498%
1499*/
1500MagickExport MagickBooleanType IsPathAccessible(const char *path)
1501{
1502 MagickBooleanType
1503 status;
1504
1505 struct stat
1506 attributes;
1507
1508 if ((path == (const char *) NULL) || (*path == '\0'))
1509 return(MagickFalse);
1510 if (LocaleCompare(path,"-") == 0)
1511 return(MagickTrue);
1512 status=GetPathAttributes(path,&attributes);
1513 if (status == MagickFalse)
1514 return(status);
1515 if (S_ISREG(attributes.st_mode) == 0)
1516 return(MagickFalse);
1517 if (access_utf8(path,F_OK) != 0)
1518 return(MagickFalse);
1519 return(MagickTrue);
1520}
1521␌
1522/*
1523%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1524% %
1525% %
1526% %
1527+ I s P a t h D i r e c t o r y %
1528% %
1529% %
1530% %
1531%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1532%
1533% IsPathDirectory() returns -1 if the directory does not exist, 1 is returned
1534% if the path represents a directory otherwise 0.
1535%
1536% The format of the IsPathDirectory method is:
1537%
1538% int IsPathDirectory(const char *path)
1539%
1540% A description of each parameter follows.
1541%
1542% o path: The directory path.
1543%
1544*/
1545static int IsPathDirectory(const char *path)
1546{
1547 MagickBooleanType
1548 status;
1549
1550 struct stat
1551 attributes;
1552
1553 if ((path == (const char *) NULL) || (*path == '\0'))
1554 return(MagickFalse);
1555 status=GetPathAttributes(path,&attributes);
1556 if (status == MagickFalse)
1557 return(-1);
1558 if (S_ISDIR(attributes.st_mode) == 0)
1559 return(0);
1560 return(1);
1561}
1562␌
1563/*
1564%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1565% %
1566% %
1567% %
1568% L i s t F i l e s %
1569% %
1570% %
1571% %
1572%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1573%
1574% ListFiles() reads the directory specified and returns a list of filenames
1575% contained in the directory sorted in ascending alphabetic order.
1576%
1577% The format of the ListFiles function is:
1578%
1579% char **ListFiles(const char *directory,const char *pattern,
1580% ssize_t *number_entries)
1581%
1582% A description of each parameter follows:
1583%
1584% o filelist: Method ListFiles returns a list of filenames contained
1585% in the directory. If the directory specified cannot be read or it is
1586% a file a NULL list is returned.
1587%
1588% o directory: Specifies a pointer to a text string containing a directory
1589% name.
1590%
1591% o pattern: Specifies a pointer to a text string containing a pattern.
1592%
1593% o number_entries: This integer returns the number of filenames in the
1594% list.
1595%
1596*/
1597
1598#if defined(__cplusplus) || defined(c_plusplus)
1599extern "C" {
1600#endif
1601
1602static int FileCompare(const void *x,const void *y)
1603{
1604 const char
1605 **p,
1606 **q;
1607
1608 p=(const char **) x;
1609 q=(const char **) y;
1610 return(LocaleCompare(*p,*q));
1611}
1612
1613#if defined(__cplusplus) || defined(c_plusplus)
1614}
1615#endif
1616
1617MagickPrivate char **ListFiles(const char *directory,const char *pattern,
1618 size_t *number_entries)
1619{
1620 char
1621 **filelist;
1622
1623 DIR
1624 *current_directory;
1625
1626 struct dirent
1627 *buffer,
1628 *entry;
1629
1630 size_t
1631 max_entries;
1632
1633 /*
1634 Open directory.
1635 */
1636 assert(directory != (const char *) NULL);
1637 assert(pattern != (const char *) NULL);
1638 assert(number_entries != (size_t *) NULL);
1639 if (IsEventLogging() != MagickFalse)
1640 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",directory);
1641 *number_entries=0;
1642 current_directory=opendir(directory);
1643 if (current_directory == (DIR *) NULL)
1644 return((char **) NULL);
1645 /*
1646 Allocate filelist.
1647 */
1648 max_entries=2048;
1649 filelist=(char **) AcquireQuantumMemory((size_t) max_entries,
1650 sizeof(*filelist));
1651 if (filelist == (char **) NULL)
1652 {
1653 (void) closedir(current_directory);
1654 return((char **) NULL);
1655 }
1656 /*
1657 Save the current and change to the new directory.
1658 */
1659 buffer=(struct dirent *) AcquireMagickMemory(sizeof(*buffer)+FILENAME_MAX+1);
1660 if (buffer == (struct dirent *) NULL)
1661 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1662 while ((MagickReadDirectory(current_directory,buffer,&entry) == 0) &&
1663 (entry != (struct dirent *) NULL))
1664 {
1665 if ((LocaleCompare(entry->d_name,".") == 0) ||
1666 (LocaleCompare(entry->d_name,"..") == 0))
1667 continue;
1668 if ((IsPathDirectory(entry->d_name) > 0) ||
1669#if defined(MAGICKCORE_WINDOWS_SUPPORT)
1670 (GlobExpression(entry->d_name,pattern,MagickTrue) != MagickFalse))
1671#else
1672 (GlobExpression(entry->d_name,pattern,MagickFalse) != MagickFalse))
1673#endif
1674 {
1675 if (*number_entries >= max_entries)
1676 {
1677 /*
1678 Extend the file list.
1679 */
1680 max_entries<<=1;
1681 filelist=(char **) ResizeQuantumMemory(filelist,(size_t)
1682 max_entries,sizeof(*filelist));
1683 if (filelist == (char **) NULL)
1684 break;
1685 }
1686#if defined(vms)
1687 {
1688 char
1689 *p;
1690
1691 p=strchr(entry->d_name,';');
1692 if (p)
1693 *p='\0';
1694 if (*number_entries > 0)
1695 if (LocaleCompare(entry->d_name,filelist[*number_entries-1]) == 0)
1696 continue;
1697 }
1698#endif
1699 filelist[*number_entries]=(char *) AcquireString(entry->d_name);
1700 (*number_entries)++;
1701 }
1702 }
1703 buffer=(struct dirent *) RelinquishMagickMemory(buffer);
1704 (void) closedir(current_directory);
1705 if (filelist == (char **) NULL)
1706 return((char **) NULL);
1707 /*
1708 Sort filelist in ascending order.
1709 */
1710 qsort((void *) filelist,(size_t) *number_entries,sizeof(*filelist),
1711 FileCompare);
1712 return(filelist);
1713}
1714␌
1715/*
1716%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1717% %
1718% %
1719% %
1720% M a g i c k D e l a y %
1721% %
1722% %
1723% %
1724%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1725%
1726% MagickDelay() suspends program execution for the number of milliseconds
1727% specified.
1728%
1729% The format of the Delay method is:
1730%
1731% void MagickDelay(const MagickSizeType milliseconds)
1732%
1733% A description of each parameter follows:
1734%
1735% o milliseconds: Specifies the number of milliseconds to delay before
1736% returning.
1737%
1738*/
1739MagickExport void MagickDelay(const MagickSizeType milliseconds)
1740{
1741 if (milliseconds == 0)
1742 return;
1743#if defined(MAGICKCORE_HAVE_NANOSLEEP)
1744 {
1745 struct timespec
1746 timer;
1747
1748 timer.tv_sec=(time_t) (milliseconds/1000);
1749 timer.tv_nsec=(time_t) ((milliseconds % 1000)*1000*1000);
1750 (void) nanosleep(&timer,(struct timespec *) NULL);
1751 }
1752#elif defined(MAGICKCORE_HAVE_USLEEP)
1753 usleep(1000*milliseconds);
1754#elif defined(MAGICKCORE_HAVE_SELECT)
1755 {
1756 struct timeval
1757 timer;
1758
1759 timer.tv_sec=(long) milliseconds/1000;
1760 timer.tv_usec=(long) (milliseconds % 1000)*1000;
1761 (void) select(0,(XFD_SET *) NULL,(XFD_SET *) NULL,(XFD_SET *) NULL,&timer);
1762 }
1763#elif defined(MAGICKCORE_HAVE_POLL)
1764 (void) poll((struct pollfd *) NULL,0,(int) milliseconds);
1765#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
1766 Sleep((long) milliseconds);
1767#elif defined(vms)
1768 {
1769 float
1770 timer;
1771
1772 timer=milliseconds/1000.0;
1773 lib$wait(&timer);
1774 }
1775#elif defined(__BEOS__)
1776 snooze(1000*milliseconds);
1777#else
1778 {
1779 clock_t
1780 time_end;
1781
1782 time_end=clock()+milliseconds*CLOCKS_PER_SEC/1000;
1783 while (clock() < time_end)
1784 {
1785 }
1786 }
1787#endif
1788}
1789␌
1790/*
1791%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1792% %
1793% %
1794% %
1795% M u l t i l i n e C e n s u s %
1796% %
1797% %
1798% %
1799%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1800%
1801% MultilineCensus() returns the number of lines within a label. A line is
1802% represented by a \n character.
1803%
1804% The format of the MultilineCensus method is:
1805%
1806% size_t MultilineCensus(const char *label)
1807%
1808% A description of each parameter follows.
1809%
1810% o label: This character string is the label.
1811%
1812*/
1813MagickExport size_t MultilineCensus(const char *label)
1814{
1815 size_t
1816 number_lines;
1817
1818 /*
1819 Determine the number of lines within this label.
1820 */
1821 if (label == (char *) NULL)
1822 return(0);
1823 for (number_lines=1; *label != '\0'; label++)
1824 if (*label == '\n')
1825 number_lines++;
1826 return(number_lines);
1827}
1828␌
1829/*
1830%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1831% %
1832% %
1833% %
1834% S h r e d F i l e %
1835% %
1836% %
1837% %
1838%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1839%
1840% ShredFile() overwrites the specified file with random data. The overwrite is
1841% optional and is only required to help keep the contents of the file private.
1842%
1843% The format of the ShredFile method is:
1844%
1845% MagickBooleanType ShredFile(const char *path)
1846%
1847% A description of each parameter follows.
1848%
1849% o path: Specifies a path to a file.
1850%
1851*/
1852MagickPrivate MagickBooleanType ShredFile(const char *path)
1853{
1854 int
1855 file,
1856 status;
1857
1858 MagickSizeType
1859 length;
1860
1861 RandomInfo
1862 *random_info;
1863
1864 size_t
1865 quantum;
1866
1867 ssize_t
1868 i;
1869
1870 static ssize_t
1871 passes = -1;
1872
1873 StringInfo
1874 *key;
1875
1876 struct stat
1877 file_stats;
1878
1879 if ((path == (const char *) NULL) || (*path == '\0'))
1880 return(MagickFalse);
1881 if (passes == -1)
1882 {
1883 char
1884 *property;
1885
1886 passes=0;
1887 property=GetEnvironmentValue("MAGICK_SHRED_PASSES");
1888 if (property != (char *) NULL)
1889 {
1890 passes=(ssize_t) StringToInteger(property);
1891 property=DestroyString(property);
1892 }
1893 property=GetPolicyValue("system:shred");
1894 if (property != (char *) NULL)
1895 {
1896 passes=(ssize_t) StringToInteger(property);
1897 property=DestroyString(property);
1898 }
1899 }
1900 if (passes == 0)
1901 return(MagickTrue);
1902 /*
1903 Shred the file.
1904 */
1905 file=open_utf8(path,O_WRONLY | O_EXCL | O_BINARY,S_MODE);
1906 if (file == -1)
1907 return(MagickFalse);
1908 quantum=(size_t) MagickMinBufferExtent;
1909 if ((fstat(file,&file_stats) == 0) && (file_stats.st_size > 0))
1910 quantum=(size_t) MagickMin(file_stats.st_size,MagickMinBufferExtent);
1911 length=(MagickSizeType) file_stats.st_size;
1912 random_info=AcquireRandomInfo();
1913 key=GetRandomKey(random_info,quantum);
1914 for (i=0; i < passes; i++)
1915 {
1916 MagickOffsetType
1917 j;
1918
1919 ssize_t
1920 count;
1921
1922 if (lseek(file,0,SEEK_SET) < 0)
1923 break;
1924 for (j=0; j < (MagickOffsetType) length; j+=count)
1925 {
1926 if (i != 0)
1927 SetRandomKey(random_info,quantum,GetStringInfoDatum(key));
1928 count=write(file,GetStringInfoDatum(key),(size_t)
1929 MagickMin((MagickOffsetType) quantum,(MagickOffsetType) length-j));
1930 if (count <= 0)
1931 {
1932 count=0;
1933 if (errno != EINTR)
1934 break;
1935 }
1936 }
1937 if (j < (MagickOffsetType) length)
1938 break;
1939 }
1940 key=DestroyStringInfo(key);
1941 random_info=DestroyRandomInfo(random_info);
1942 status=close(file);
1943 return((status == -1 || i < passes) ? MagickFalse : MagickTrue);
1944}
_ExceptionInfo
Definition exception.h:102
_RandomInfo
Definition random.c:84
_StringInfo
Definition string_.h:28
_dirdesc
Definition vms.h:951
dirent
Definition vms.h:942