MagickCore 6.9.13-51
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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/license/ %
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 "magick/studio.h"
43#include "magick/property.h"
44#include "magick/blob.h"
45#include "magick/color.h"
46#include "magick/exception.h"
47#include "magick/exception-private.h"
48#include "magick/geometry.h"
49#include "magick/image-private.h"
50#include "magick/list.h"
51#include "magick/log.h"
52#include "magick/memory_.h"
53#include "magick/nt-base-private.h"
54#include "magick/option.h"
55#include "magick/policy.h"
56#include "magick/policy-private.h"
57#include "magick/random_.h"
58#include "magick/registry.h"
59#include "magick/resource_.h"
60#include "magick/semaphore.h"
61#include "magick/signature-private.h"
62#include "magick/statistic.h"
63#include "magick/string_.h"
64#include "magick/string-private.h"
65#include "magick/token.h"
66#include "magick/utility.h"
67#include "magick/utility-private.h"
68#if defined(MAGICKCORE_HAVE_PROCESS_H)
69#include <process.h>
70#endif
71#if defined(MAGICKCORE_HAVE_MACH_O_DYLD_H)
72#include <mach-o/dyld.h>
73#endif
74␌
75/*
76 Static declarations.
77*/
78static const char
79 Base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
80␌
81/*
82 Forward declaration.
83*/
84static int
85 IsPathDirectory(const char *);
86␌
87/*
88%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
89% %
90% %
91% %
92% A c q u i r e U n i q u e F i l e n a m e %
93% %
94% %
95% %
96%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
97%
98% AcquireUniqueFilename() replaces the contents of path by a unique path name.
99%
100% The format of the AcquireUniqueFilename method is:
101%
102% MagickBooleanType AcquireUniqueFilename(char *path)
103%
104% A description of each parameter follows.
105%
106% o path: Specifies a pointer to an array of characters. The unique path
107% name is returned in this array.
108%
109*/
110MagickExport MagickBooleanType AcquireUniqueFilename(char *path)
111{
112 int
113 file;
114
115 file=AcquireUniqueFileResource(path);
116 if (file == -1)
117 return(MagickFalse);
118 file=close_utf8(file)-1;
119 return(MagickTrue);
120}
121␌
122/*
123%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
124% %
125% %
126% %
127% A c q u i r e U n i q u e S ym b o l i c L i n k %
128% %
129% %
130% %
131%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
132%
133% AcquireUniqueSymbolicLink() creates a unique symbolic link to the specified
134% source path and returns MagickTrue on success otherwise MagickFalse. If the
135% symlink() method fails or is not available, a unique file name is generated
136% and the source file copied to it. When you are finished with the file, use
137% RelinquishUniqueFilename() to destroy it.
138%
139% The format of the AcquireUniqueSymbolicLink method is:
140%
141% MagickBooleanType AcquireUniqueSymbolicLink(const char *source,
142% char destination)
143%
144% A description of each parameter follows.
145%
146% o source: the source path.
147%
148% o destination: the destination path.
149%
150*/
151
152MagickExport MagickBooleanType AcquireUniqueSymbolicLink(const char *source,
153 char *destination)
154{
155 int
156 destination_file,
157 source_file;
158
159 MagickBooleanType
160 status;
161
162 size_t
163 length,
164 quantum;
165
166 ssize_t
167 count;
168
169 struct stat
170 attributes;
171
172 unsigned char
173 *buffer;
174
175 assert(source != (const char *) NULL);
176 assert(destination != (char *) NULL);
177#if defined(MAGICKCORE_HAVE_SYMLINK)
178 {
179 char
180 *passes;
181
182 /*
183 Does policy permit symbolic links?
184 */
185 status=IsRightsAuthorizedByName(SystemPolicyDomain,"symlink",(PolicyRights)
186 (ReadPolicyRights | WritePolicyRights),"follow");
187 passes=GetPolicyValue("system:shred");
188 if ((passes != (char *) NULL) || (status == MagickFalse))
189 passes=DestroyString(passes);
190 else
191 {
192 (void) AcquireUniqueFilename(destination);
193 (void) RelinquishUniqueFileResource(destination);
194 if (*source == *DirectorySeparator)
195 {
196 if (symlink(source,destination) == 0)
197 return(MagickTrue);
198 }
199 else
200 {
201 char
202 path[MaxTextExtent];
203
204 *path='\0';
205 if (getcwd(path,MaxTextExtent) == (char *) NULL)
206 return(MagickFalse);
207 (void) ConcatenateMagickString(path,DirectorySeparator,
208 MaxTextExtent);
209 (void) ConcatenateMagickString(path,source,MaxTextExtent);
210 if (symlink(path,destination) == 0)
211 return(MagickTrue);
212 }
213 }
214 }
215#endif
216 /*
217 Copy file from source to destination.
218 */
219 destination_file=AcquireUniqueFileResource(destination);
220 if (destination_file == -1)
221 return(MagickFalse);
222 source_file=open_utf8(source,O_RDONLY | O_BINARY,0);
223 if (source_file == -1)
224 {
225 (void) close(destination_file);
226 (void) RelinquishUniqueFileResource(destination);
227 return(MagickFalse);
228 }
229 quantum=(size_t) MagickMaxBufferExtent;
230 if ((fstat(source_file,&attributes) == 0) && (attributes.st_size > 0))
231 quantum=(size_t) MagickMin(attributes.st_size,MagickMaxBufferExtent);
232 buffer=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*buffer));
233 if (buffer == (unsigned char *) NULL)
234 {
235 (void) close(source_file);
236 (void) close(destination_file);
237 (void) RelinquishUniqueFileResource(destination);
238 return(MagickFalse);
239 }
240 status=MagickTrue;
241 for (length=0; ; )
242 {
243 count=(ssize_t) read(source_file,buffer,quantum);
244 if (count <= 0)
245 break;
246 length=(size_t) count;
247 count=(ssize_t) write(destination_file,buffer,length);
248 if ((size_t) count != length)
249 {
250 (void) RelinquishUniqueFileResource(destination);
251 status=MagickFalse;
252 break;
253 }
254 }
255 (void) close(destination_file);
256 (void) close(source_file);
257 buffer=(unsigned char *) RelinquishMagickMemory(buffer);
258 return(status);
259}
260␌
261/*
262%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
263% %
264% %
265% %
266% A p p e n d I m a g e F o r m a t %
267% %
268% %
269% %
270%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
271%
272% AppendImageFormat() appends the image format type to the filename. If an
273% extension to the file already exists, it is first removed.
274%
275% The format of the AppendImageFormat method is:
276%
277% void AppendImageFormat(const char *format,char *filename)
278%
279% A description of each parameter follows.
280%
281% o format: Specifies a pointer to an array of characters. This the
282% format of the image.
283%
284% o filename: Specifies a pointer to an array of characters. The unique
285% file name is returned in this array.
286%
287*/
288MagickExport void AppendImageFormat(const char *format,char *filename)
289{
290 char
291 extension[MaxTextExtent],
292 root[MaxTextExtent];
293
294 assert(format != (char *) NULL);
295 assert(filename != (char *) NULL);
296 if (IsEventLogging() != MagickFalse)
297 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
298 if ((*format == '\0') || (*filename == '\0'))
299 return;
300 if (LocaleCompare(filename,"-") == 0)
301 {
302 char
303 message[MaxTextExtent];
304
305 (void) FormatLocaleString(message,MaxTextExtent,"%s:%s",format,filename);
306 (void) CopyMagickString(filename,message,MaxTextExtent);
307 return;
308 }
309 GetPathComponent(filename,ExtensionPath,extension);
310 if ((LocaleCompare(extension,"Z") == 0) ||
311 (LocaleCompare(extension,"bz2") == 0) ||
312 (LocaleCompare(extension,"gz") == 0) ||
313 (LocaleCompare(extension,"wmz") == 0) ||
314 (LocaleCompare(extension,"svgz") == 0))
315 {
316 GetPathComponent(filename,RootPath,root);
317 (void) CopyMagickString(filename,root,MaxTextExtent);
318 GetPathComponent(filename,RootPath,root);
319 (void) FormatLocaleString(filename,MaxTextExtent,"%s.%s.%s",root,format,
320 extension);
321 return;
322 }
323 GetPathComponent(filename,RootPath,root);
324 (void) FormatLocaleString(filename,MaxTextExtent,"%s.%s",root,format);
325}
326␌
327/*
328%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
329% %
330% %
331% %
332% B a s e 6 4 D e c o d e %
333% %
334% %
335% %
336%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
337%
338% Base64Decode() decodes Base64-encoded text and returns its binary
339% equivalent. NULL is returned if the text is not valid Base64 data, or a
340% memory allocation failure occurs.
341%
342% The format of the Base64Decode method is:
343%
344% unsigned char *Base64Decode(const char *source,length_t *length)
345%
346% A description of each parameter follows:
347%
348% o source: A pointer to a Base64-encoded string.
349%
350% o length: the number of bytes decoded.
351%
352*/
353MagickExport unsigned char *Base64Decode(const char *source,size_t *length)
354{
355 int
356 state;
357
358 const char
359 *p,
360 *q;
361
362 size_t
363 i;
364
365 unsigned char
366 *decode;
367
368 assert(source != (char *) NULL);
369 assert(length != (size_t *) NULL);
370 if (IsEventLogging() != MagickFalse)
371 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
372 *length=0;
373 decode=(unsigned char *) AcquireQuantumMemory((strlen(source)+3)/4,
374 3*sizeof(*decode));
375 if (decode == (unsigned char *) NULL)
376 return((unsigned char *) NULL);
377 i=0;
378 state=0;
379 for (p=source; *p != '\0'; p++)
380 {
381 if (isspace((int) ((unsigned char) *p)) != 0)
382 continue;
383 if (*p == '=')
384 break;
385 q=strchr(Base64,*p);
386 if (q == (char *) NULL)
387 {
388 decode=(unsigned char *) RelinquishMagickMemory(decode);
389 return((unsigned char *) NULL); /* non-Base64 character */
390 }
391 switch (state)
392 {
393 case 0:
394 {
395 decode[i]=(q-Base64) << 2;
396 state++;
397 break;
398 }
399 case 1:
400 {
401 decode[i++]|=(q-Base64) >> 4;
402 decode[i]=((q-Base64) & 0x0f) << 4;
403 state++;
404 break;
405 }
406 case 2:
407 {
408 decode[i++]|=(q-Base64) >> 2;
409 decode[i]=((q-Base64) & 0x03) << 6;
410 state++;
411 break;
412 }
413 case 3:
414 {
415 decode[i++]|=(q-Base64);
416 state=0;
417 break;
418 }
419 }
420 }
421 /*
422 Verify Base-64 string has proper terminal characters.
423 */
424 if (*p != '=')
425 {
426 if (state != 0)
427 {
428 decode=(unsigned char *) RelinquishMagickMemory(decode);
429 return((unsigned char *) NULL);
430 }
431 }
432 else
433 {
434 p++;
435 switch (state)
436 {
437 case 0:
438 case 1:
439 {
440 /*
441 Unrecognized '=' character.
442 */
443 decode=(unsigned char *) RelinquishMagickMemory(decode);
444 return((unsigned char *) NULL);
445 }
446 case 2:
447 {
448 for ( ; *p != '\0'; p++)
449 if (isspace((int) ((unsigned char) *p)) == 0)
450 break;
451 if (*p != '=')
452 {
453 decode=(unsigned char *) RelinquishMagickMemory(decode);
454 return((unsigned char *) NULL);
455 }
456 p++;
457 }
458 case 3:
459 {
460 for ( ; *p != '\0'; p++)
461 if (isspace((int) ((unsigned char) *p)) == 0)
462 {
463 decode=(unsigned char *) RelinquishMagickMemory(decode);
464 return((unsigned char *) NULL);
465 }
466 if ((int) decode[i] != 0)
467 {
468 decode=(unsigned char *) RelinquishMagickMemory(decode);
469 return((unsigned char *) NULL);
470 }
471 break;
472 }
473 }
474 }
475 *length=i;
476 return(decode);
477}
478␌
479/*
480%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
481% %
482% %
483% %
484% B a s e 6 4 E n c o d e %
485% %
486% %
487% %
488%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
489%
490% Base64Encode() encodes arbitrary binary data to Base64 encoded format as
491% described by the "Base64 Content-Transfer-Encoding" section of RFC 2045 and
492% returns the result as a null-terminated ASCII string. NULL is returned if
493% a memory allocation failure occurs.
494%
495% The format of the Base64Encode method is:
496%
497% char *Base64Encode(const unsigned char *blob,const size_t blob_length,
498% size_t *encode_length)
499%
500% A description of each parameter follows:
501%
502% o blob: A pointer to binary data to encode.
503%
504% o blob_length: the number of bytes to encode.
505%
506% o encode_length: The number of bytes encoded.
507%
508*/
509MagickExport char *Base64Encode(const unsigned char *blob,
510 const size_t blob_length,size_t *encode_length)
511{
512 char
513 *encode;
514
515 const unsigned char
516 *p;
517
518 size_t
519 i;
520
521 size_t
522 remainder;
523
524 assert(blob != (const unsigned char *) NULL);
525 assert(blob_length != 0);
526 assert(encode_length != (size_t *) NULL);
527 if (IsEventLogging() != MagickFalse)
528 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
529 *encode_length=0;
530 encode=(char *) AcquireQuantumMemory(blob_length/3+4,4*sizeof(*encode));
531 if (encode == (char *) NULL)
532 return((char *) NULL);
533 i=0;
534 for (p=blob; p < (blob+blob_length-2); p+=(ptrdiff_t) 3)
535 {
536 encode[i++]=Base64[(int) (*p >> 2)];
537 encode[i++]=Base64[(int) (((*p & 0x03) << 4)+(*(p+1) >> 4))];
538 encode[i++]=Base64[(int) (((*(p+1) & 0x0f) << 2)+(*(p+2) >> 6))];
539 encode[i++]=Base64[(int) (*(p+2) & 0x3f)];
540 }
541 remainder=blob_length % 3;
542 if (remainder != 0)
543 {
544 ssize_t
545 j;
546
547 unsigned char
548 code[3];
549
550 code[0]='\0';
551 code[1]='\0';
552 code[2]='\0';
553 for (j=0; j < (ssize_t) remainder; j++)
554 code[j]=(*p++);
555 encode[i++]=Base64[(int) (code[0] >> 2)];
556 encode[i++]=Base64[(int) (((code[0] & 0x03) << 4)+(code[1] >> 4))];
557 if (remainder == 1)
558 encode[i++]='=';
559 else
560 encode[i++]=Base64[(int) (((code[1] & 0x0f) << 2)+(code[2] >> 6))];
561 encode[i++]='=';
562 }
563 *encode_length=i;
564 encode[i++]='\0';
565 return(encode);
566}
567␌
568/*
569%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
570% %
571% %
572% %
573% C h o p P a t h C o m p o n e n t s %
574% %
575% %
576% %
577%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
578%
579% ChopPathComponents() removes the number of specified file components from a
580% path.
581%
582% The format of the ChopPathComponents method is:
583%
584% ChopPathComponents(char *path,size_t components)
585%
586% A description of each parameter follows:
587%
588% o path: The path.
589%
590% o components: The number of components to chop.
591%
592*/
593MagickExport void ChopPathComponents(char *path,const size_t components)
594{
595 ssize_t
596 i;
597
598 for (i=0; i < (ssize_t) components; i++)
599 GetPathComponent(path,HeadPath,path);
600}
601␌
602/*
603%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
604% %
605% %
606% %
607% E x p a n d F i l e n a m e %
608% %
609% %
610% %
611%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
612%
613% ExpandFilename() expands '~' in a path.
614%
615% The format of the ExpandFilename function is:
616%
617% ExpandFilename(char *path)
618%
619% A description of each parameter follows:
620%
621% o path: Specifies a pointer to a character array that contains the
622% path.
623%
624*/
625MagickExport void ExpandFilename(char *path)
626{
627 char
628 expand_path[MaxTextExtent];
629
630 if (path == (char *) NULL)
631 return;
632 if (*path != '~')
633 return;
634 (void) CopyMagickString(expand_path,path,MaxTextExtent);
635 if ((*(path+1) == *DirectorySeparator) || (*(path+1) == '\0'))
636 {
637 char
638 *home;
639
640 /*
641 Substitute ~ with $HOME.
642 */
643 (void) CopyMagickString(expand_path,".",MaxTextExtent);
644 (void) ConcatenateMagickString(expand_path,path+1,MaxTextExtent);
645 home=GetEnvironmentValue("HOME");
646 if (home == (char *) NULL)
647 home=GetEnvironmentValue("USERPROFILE");
648 if (home != (char *) NULL)
649 {
650 (void) CopyMagickString(expand_path,home,MaxTextExtent);
651 (void) ConcatenateMagickString(expand_path,path+1,MaxTextExtent);
652 home=DestroyString(home);
653 }
654 }
655 else
656 {
657#if defined(MAGICKCORE_POSIX_SUPPORT) && !defined(__OS2__)
658 char
659#if defined(MAGICKCORE_HAVE_GETPWNAM_R)
660 buffer[MagickPathExtent],
661#endif
662 username[MaxTextExtent];
663
664 char
665 *p;
666
667 struct passwd
668 *entry;
669
670 /*
671 Substitute ~ with home directory from password file.
672 */
673 (void) CopyMagickString(username,path+1,MaxTextExtent);
674 p=strchr(username,'/');
675 if (p != (char *) NULL)
676 *p='\0';
677#if !defined(MAGICKCORE_HAVE_GETPWNAM_R)
678 entry=getpwnam(username);
679#else
680 struct passwd
681 pwd;
682
683 entry=(struct passwd *) NULL;
684 if (getpwnam_r(username,&pwd,buffer,sizeof(buffer),&entry) < 0)
685 return;
686#endif
687 if (entry == (struct passwd *) NULL)
688 return;
689 (void) CopyMagickString(expand_path,entry->pw_dir,MaxTextExtent);
690 if (p != (char *) NULL)
691 {
692 (void) ConcatenateMagickString(expand_path,"/",MaxTextExtent);
693 (void) ConcatenateMagickString(expand_path,p+1,MaxTextExtent);
694 }
695#endif
696 }
697 (void) CopyMagickString(path,expand_path,MaxTextExtent);
698}
699␌
700/*
701%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
702% %
703% %
704% %
705% E x p a n d F i l e n a m e s %
706% %
707% %
708% %
709%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
710%
711% ExpandFilenames() checks each argument of the given argument array, and
712% expands it if they have a wildcard character.
713%
714% Any coder prefix (EG: 'coder:filename') or read modifier postfix (EG:
715% 'filename[...]') are ignored during the file the expansion, but will be
716% included in the final argument. If no filename matching the meta-character
717% 'glob' is found the original argument is returned.
718%
719% For example, an argument of '*.gif[20x20]' will be replaced by the list
720% 'abc.gif[20x20]', 'foobar.gif[20x20]', 'xyzzy.gif[20x20]'
721% if such filenames exist, (in the current directory in this case).
722%
723% Meta-characters handled...
724% @ read a list of filenames (no further expansion performed)
725% ~ At start of filename expands to HOME environment variable
726% * matches any string including an empty string
727% ? matches by any single character
728%
729% WARNING: filenames starting with '.' (hidden files in a UNIX file system)
730% will never be expanded. Attempting to expand '.*' will produce no change.
731%
732% Expansion is ignored for coders "label:" "caption:" "pango:" and "vid:".
733% Which provide their own '@' meta-character handling.
734%
735% You can see the results of the expansion using "Configure" log events.
736%
737% The returned list should be freed using DestroyStringList().
738%
739% However the strings in the original pointed to argv are not
740% freed (TO BE CHECKED). So a copy of the original pointer (and count)
741% should be kept separate if they need to be freed later.
742%
743% The format of the ExpandFilenames function is:
744%
745% status=ExpandFilenames(int *number_arguments,char ***arguments)
746%
747% A description of each parameter follows:
748%
749% o number_arguments: Specifies a pointer to an integer describing the
750% number of elements in the argument vector.
751%
752% o arguments: Specifies a pointer to a text array containing the command
753% line arguments.
754%
755*/
756static inline void getcwd_utf8(char *path,size_t extent)
757{
758#if !defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__CYGWIN__)
759 char
760 *directory;
761
762 directory=getcwd(path,extent);
763 (void) directory;
764#else
765 wchar_t
766 wide_path[MaxTextExtent];
767
768 (void) _wgetcwd(wide_path,MaxTextExtent-1);
769 (void) WideCharToMultiByte(CP_UTF8,0,wide_path,-1,path,(int) extent,NULL,NULL);
770#endif
771}
772
773MagickExport MagickBooleanType ExpandFilenames(int *number_arguments,
774 char ***arguments)
775{
776 char
777 home_directory[MaxTextExtent],
778 **vector;
779
780 ssize_t
781 i,
782 j;
783
784 size_t
785 number_files;
786
787 ssize_t
788 count,
789 parameters;
790
791 /*
792 Allocate argument vector.
793 */
794 assert(number_arguments != (int *) NULL);
795 assert(arguments != (char ***) NULL);
796 if (IsEventLogging() != MagickFalse)
797 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
798 vector=(char **) AcquireQuantumMemory((size_t) (*number_arguments+1),
799 sizeof(*vector));
800 if (vector == (char **) NULL)
801 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
802 /*
803 Expand any wildcard filenames.
804 */
805 *home_directory='\0';
806 count=0;
807 for (i=0; i < (ssize_t) *number_arguments; i++)
808 {
809 char
810 **filelist,
811 filename[MaxTextExtent],
812 magick[MaxTextExtent],
813 *option,
814 path[MaxTextExtent],
815 subimage[MaxTextExtent];
816
817 MagickBooleanType
818 destroy;
819
820 option=(*arguments)[i];
821 *magick='\0';
822 *path='\0';
823 *filename='\0';
824 *subimage='\0';
825 number_files=0;
826 vector[count++]=ConstantString(option);
827 destroy=MagickTrue;
828 parameters=ParseCommandOption(MagickCommandOptions,MagickFalse,option);
829 if (parameters > 0)
830 {
831 /*
832 Do not expand command option parameters.
833 */
834 for (j=0; j < parameters; j++)
835 {
836 i++;
837 if (i == (ssize_t) *number_arguments)
838 break;
839 option=(*arguments)[i];
840 vector[count++]=ConstantString(option);
841 }
842 continue;
843 }
844 if ((*option == '"') || (*option == '\''))
845 continue;
846 GetPathComponent(option,TailPath,filename);
847 GetPathComponent(option,MagickPath,magick);
848 if ((LocaleCompare(magick,"CAPTION") == 0) ||
849 (LocaleCompare(magick,"LABEL") == 0) ||
850 (LocaleCompare(magick,"PANGO") == 0) ||
851 (LocaleCompare(magick,"VID") == 0))
852 continue;
853 if ((IsGlob(filename) == MagickFalse) && (*option != '@'))
854 continue;
855 if (IsPathAccessible(option) != MagickFalse)
856 continue;
857 if (*option != '@')
858 {
859 /*
860 Generate file list from wildcard filename (e.g. *.jpg).
861 */
862 GetPathComponent(option,HeadPath,path);
863 GetPathComponent(option,SubimagePath,subimage);
864 ExpandFilename(path);
865 if (*home_directory == '\0')
866 getcwd_utf8(home_directory,MaxTextExtent-1);
867 filelist=ListFiles(*path == '\0' ? home_directory : path,filename,
868 &number_files);
869 }
870 else
871 {
872 char
873 *files;
874
875 ExceptionInfo
876 *exception;
877
878 int
879 length;
880
881 /*
882 Generate file list from file list (e.g. @filelist.txt).
883 */
884 exception=AcquireExceptionInfo();
885 files=FileToString(option,~0UL,exception);
886 exception=DestroyExceptionInfo(exception);
887 if (files == (char *) NULL)
888 continue;
889 filelist=StringToArgv(files,&length);
890 if (filelist == (char **) NULL)
891 continue;
892 files=DestroyString(files);
893 filelist[0]=DestroyString(filelist[0]);
894 for (j=0; j < (ssize_t) (length-1); j++)
895 filelist[j]=filelist[j+1];
896 number_files=(size_t) length-1;
897 }
898 if (filelist == (char **) NULL)
899 continue;
900 for (j=0; j < (ssize_t) number_files; j++)
901 if (IsPathDirectory(filelist[j]) <= 0)
902 break;
903 if (j == (ssize_t) number_files)
904 {
905 for (j=0; j < (ssize_t) number_files; j++)
906 filelist[j]=DestroyString(filelist[j]);
907 filelist=(char **) RelinquishMagickMemory(filelist);
908 continue;
909 }
910 /*
911 Transfer file list to argument vector.
912 */
913 vector=(char **) ResizeQuantumMemory(vector,(size_t) *number_arguments+
914 count+number_files+1,sizeof(*vector));
915 if (vector == (char **) NULL)
916 {
917 for (j=0; j < (ssize_t) number_files; j++)
918 filelist[j]=DestroyString(filelist[j]);
919 filelist=(char **) RelinquishMagickMemory(filelist);
920 return(MagickFalse);
921 }
922 for (j=0; j < (ssize_t) number_files; j++)
923 {
924 option=filelist[j];
925 parameters=ParseCommandOption(MagickCommandOptions,MagickFalse,option);
926 if (parameters > 0)
927 {
928 ssize_t
929 k;
930
931 /*
932 Do not expand command option parameters.
933 */
934 vector[count++]=ConstantString(option);
935 for (k=0; k < parameters; k++)
936 {
937 j++;
938 if (j == (ssize_t) number_files)
939 break;
940 option=filelist[j];
941 vector[count++]=ConstantString(option);
942 }
943 continue;
944 }
945 (void) CopyMagickString(filename,path,MaxTextExtent);
946 if (*path != '\0')
947 (void) ConcatenateMagickString(filename,DirectorySeparator,
948 MaxTextExtent);
949 if (filelist[j] != (char *) NULL)
950 (void) ConcatenateMagickString(filename,filelist[j],MaxTextExtent);
951 filelist[j]=DestroyString(filelist[j]);
952 if (strlen(filename) >= (MaxTextExtent-1))
953 ThrowFatalException(OptionFatalError,"FilenameTruncated");
954 if (IsPathDirectory(filename) <= 0)
955 {
956 char
957 path[MaxTextExtent];
958
959 *path='\0';
960 if (*magick != '\0')
961 {
962 (void) ConcatenateMagickString(path,magick,MaxTextExtent);
963 (void) ConcatenateMagickString(path,":",MaxTextExtent);
964 }
965 (void) ConcatenateMagickString(path,filename,MaxTextExtent);
966 if (*subimage != '\0')
967 {
968 (void) ConcatenateMagickString(path,"[",MaxTextExtent);
969 (void) ConcatenateMagickString(path,subimage,MaxTextExtent);
970 (void) ConcatenateMagickString(path,"]",MaxTextExtent);
971 }
972 if (strlen(path) >= (MaxTextExtent-1))
973 ThrowFatalException(OptionFatalError,"FilenameTruncated");
974 if (destroy != MagickFalse)
975 {
976 count--;
977 vector[count]=DestroyString(vector[count]);
978 destroy=MagickFalse;
979 }
980 vector[count++]=ConstantString(path);
981 }
982 }
983 filelist=(char **) RelinquishMagickMemory(filelist);
984 }
985 vector[count]=(char *) NULL;
986 if (IsEventLogging() != MagickFalse)
987 {
988 char
989 *command_line;
990
991 command_line=AcquireString(vector[0]);
992 for (i=1; i < count; i++)
993 {
994 (void) ConcatenateString(&command_line," {");
995 (void) ConcatenateString(&command_line,vector[i]);
996 (void) ConcatenateString(&command_line,"}");
997 }
998 (void) LogMagickEvent(ConfigureEvent,GetMagickModule(),
999 "Command line: %s",command_line);
1000 command_line=DestroyString(command_line);
1001 }
1002 *number_arguments=(int) count;
1003 *arguments=vector;
1004 return(MagickTrue);
1005}
1006␌
1007/*
1008%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1009% %
1010% %
1011% %
1012% G e t E x e c u t i o n P a t h %
1013% %
1014% %
1015% %
1016%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1017%
1018% GetExecutionPath() returns the pathname of the executable that started
1019% the process. On success MagickTrue is returned, otherwise MagickFalse.
1020%
1021% The format of the GetExecutionPath method is:
1022%
1023% MagickBooleanType GetExecutionPath(char *path,const size_t extent)
1024%
1025% A description of each parameter follows:
1026%
1027% o path: the pathname of the executable that started the process.
1028%
1029% o extent: the maximum extent of the path.
1030%
1031*/
1032MagickExport MagickBooleanType GetExecutionPath(char *path,const size_t extent)
1033{
1034 char
1035 *directory;
1036
1037 *path='\0';
1038 directory=getcwd(path,(unsigned long) extent);
1039 (void) directory;
1040#if defined(MAGICKCORE_HAVE_GETPID) && defined(MAGICKCORE_HAVE_READLINK) && defined(PATH_MAX)
1041 {
1042 char
1043 link_path[MaxTextExtent],
1044 execution_path[PATH_MAX+1];
1045
1046 ssize_t
1047 count;
1048
1049 (void) FormatLocaleString(link_path,MaxTextExtent,"/proc/%.20g/exe",
1050 (double) getpid());
1051 count=readlink(link_path,execution_path,PATH_MAX);
1052 if (count == -1)
1053 {
1054 (void) FormatLocaleString(link_path,MaxTextExtent,"/proc/%.20g/file",
1055 (double) getpid());
1056 count=readlink(link_path,execution_path,PATH_MAX);
1057 }
1058 if ((count > 0) && (count <= (ssize_t) PATH_MAX))
1059 {
1060 execution_path[count]='\0';
1061 (void) CopyMagickString(path,execution_path,extent);
1062 }
1063 }
1064#endif
1065#if defined(MAGICKCORE_HAVE__NSGETEXECUTABLEPATH)
1066 {
1067 char
1068 executable_path[PATH_MAX << 1];
1069
1070 uint32_t
1071 length;
1072
1073 length=sizeof(executable_path);
1074 if (_NSGetExecutablePath(executable_path,&length) == 0)
1075 {
1076 char
1077 *real_path = realpath_utf8(executable_path);
1078
1079 if (real_path != (char *) NULL)
1080 {
1081 (void) CopyMagickString(path,real_path,extent);
1082 real_path=DestroyString(real_path);
1083 }
1084 }
1085 }
1086#endif
1087#if defined(MAGICKCORE_HAVE_GETEXECNAME)
1088 {
1089 const char
1090 *execution_path;
1091
1092 execution_path=(const char *) getexecname();
1093 if (execution_path != (const char *) NULL)
1094 {
1095 if (*execution_path != *DirectorySeparator)
1096 (void) ConcatenateMagickString(path,DirectorySeparator,extent);
1097 (void) ConcatenateMagickString(path,execution_path,extent);
1098 }
1099 }
1100#endif
1101#if defined(MAGICKCORE_WINDOWS_SUPPORT)
1102 NTGetExecutionPath(path,extent);
1103#endif
1104#if defined(__GNU__)
1105 {
1106 char
1107 *program_name;
1108
1109 ssize_t
1110 count;
1111
1112 count=0;
1113 program_name=program_invocation_name;
1114 if (*program_invocation_name != '/')
1115 {
1116 size_t
1117 extent;
1118
1119 extent=strlen(directory)+strlen(program_name)+2;
1120 program_name=AcquireQuantumMemory(extent,sizeof(*program_name));
1121 if (program_name == (char *) NULL)
1122 program_name=program_invocation_name;
1123 else
1124 count=FormatLocaleString(program_name,extent,"%s/%s",directory,
1125 program_invocation_name);
1126 }
1127 if (count != -1)
1128 {
1129 char
1130 *real_path = realpath_utf8(program_name);
1131
1132 if (real_path != (char *) NULL)
1133 {
1134 (void) CopyMagickString(path,real_path,extent);
1135 real_path=DestroyString(real_path);
1136 }
1137 }
1138 if (program_name != program_invocation_name)
1139 program_name=(char *) RelinquishMagickMemory(program_name);
1140 }
1141#endif
1142#if defined(__OpenBSD__)
1143 {
1144 extern char
1145 *__progname;
1146
1147 (void) CopyMagickString(path,__progname,extent);
1148 }
1149#endif
1150 return(IsPathAccessible(path));
1151}
1152␌
1153/*
1154%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1155% %
1156% %
1157% %
1158% G e t M a g i c k P a g e S i z e %
1159% %
1160% %
1161% %
1162%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1163%
1164% GetMagickPageSize() returns the memory page size.
1165%
1166% The format of the GetMagickPageSize method is:
1167%
1168% ssize_t GetMagickPageSize()
1169%
1170*/
1171MagickExport ssize_t GetMagickPageSize(void)
1172{
1173 static ssize_t
1174 page_size = -1;
1175
1176 if (page_size > 0)
1177 return(page_size);
1178#if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
1179 page_size=(ssize_t) sysconf(_SC_PAGE_SIZE);
1180#elif defined(MAGICKCORE_HAVE_GETPAGESIZE)
1181 page_size=(ssize_t) getpagesize();
1182#endif
1183 if (page_size <= 0)
1184 page_size=4096;
1185 return(page_size);
1186}
1187␌
1188/*
1189%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1190% %
1191% %
1192% %
1193% G e t P a t h A t t r i b u t e s %
1194% %
1195% %
1196% %
1197%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1198%
1199% GetPathAttributes() returns attributes (e.g. size of file) about a path.
1200%
1201% The path of the GetPathAttributes method is:
1202%
1203% MagickBooleanType GetPathAttributes(const char *path,void *attributes)
1204%
1205% A description of each parameter follows.
1206%
1207% o path: the file path.
1208%
1209% o attributes: the path attributes are returned here.
1210%
1211*/
1212MagickExport MagickBooleanType GetPathAttributes(const char *path,
1213 void *attributes)
1214{
1215 MagickBooleanType
1216 status;
1217
1218 if (path == (const char *) NULL)
1219 {
1220 errno=EINVAL;
1221 return(MagickFalse);
1222 }
1223 (void) memset(attributes,0,sizeof(struct stat));
1224 status=stat_utf8(path,(struct stat *) attributes) == 0 ? MagickTrue :
1225 MagickFalse;
1226 return(status);
1227}
1228␌
1229/*
1230%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1231% %
1232% %
1233% %
1234% G e t P a t h C o m p o n e n t %
1235% %
1236% %
1237% %
1238%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1239%
1240% GetPathComponent() returns the parent directory name, filename, basename, or
1241% extension of a file path.
1242%
1243% The component string pointed to must have at least MaxTextExtent space
1244% for the results to be stored.
1245%
1246% The format of the GetPathComponent function is:
1247%
1248% GetPathComponent(const char *path,PathType type,char *component)
1249%
1250% A description of each parameter follows:
1251%
1252% o path: Specifies a pointer to a character array that contains the
1253% file path.
1254%
1255% o type: Specifies which file path component to return.
1256%
1257% o component: the selected file path component is returned here.
1258%
1259*/
1260MagickExport void GetPathComponent(const char *path,PathType type,
1261 char *component)
1262{
1263 char
1264 *q;
1265
1266 char
1267 *p;
1268
1269 size_t
1270 magick_length,
1271 subimage_offset,
1272 subimage_length;
1273
1274 assert(path != (const char *) NULL);
1275 assert(component != (char *) NULL);
1276 if (IsEventLogging() != MagickFalse)
1277 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",path);
1278 if (*path == '\0')
1279 {
1280 *component='\0';
1281 return;
1282 }
1283 (void) CopyMagickString(component,path,MagickPathExtent);
1284 subimage_length=0;
1285 subimage_offset=0;
1286 if (type != SubcanonicalPath)
1287 {
1288 p=component+strlen(component)-1;
1289 if ((strlen(component) > 2) && (*p == ']'))
1290 {
1291 q=strrchr(component,'[');
1292 if ((q != (char *) NULL) && ((q == component) || (*(q-1) != ']')) &&
1293 (IsPathAccessible(path) == MagickFalse))
1294 {
1295 /*
1296 Look for scene specification (e.g. img0001.pcd[4]).
1297 */
1298 *p='\0';
1299 if ((IsSceneGeometry(q+1,MagickFalse) == MagickFalse) &&
1300 (IsGeometry(q+1) == MagickFalse))
1301 *p=']';
1302 else
1303 {
1304 subimage_length=(size_t) (p-q);
1305 subimage_offset=(size_t) (q-component+1);
1306 *q='\0';
1307 }
1308 }
1309 }
1310 }
1311 magick_length=0;
1312#if defined(__OS2__)
1313 if (path[1] != ":")
1314#endif
1315 for (p=component; *p != '\0'; p++)
1316 {
1317 if ((*p == '%') && (*(p+1) == '['))
1318 {
1319 /*
1320 Skip over %[...].
1321 */
1322 for (p++; (*p != ']') && (*p != '\0'); p++) ;
1323 if (*p == '\0')
1324 break;
1325 }
1326 if ((p != component) && (*p == ':') && (IsPathDirectory(component) < 0) &&
1327 (IsPathAccessible(component) == MagickFalse))
1328 {
1329 /*
1330 Look for image format specification (e.g. ps3:image).
1331 */
1332 *p='\0';
1333 if (IsMagickConflict(component) != MagickFalse)
1334 *p=':';
1335 else
1336 {
1337 magick_length=(size_t) (p-component+1);
1338 for (q=component; *(++p) != '\0'; q++)
1339 *q=(*p);
1340 *q='\0';
1341 }
1342 break;
1343 }
1344 }
1345 p=component;
1346 if (*p != '\0')
1347 for (p=component+strlen(component)-1; p > component; p--)
1348 if (IsBasenameSeparator(*p) != MagickFalse)
1349 break;
1350 switch (type)
1351 {
1352 case MagickPath:
1353 {
1354 if (magick_length != 0)
1355 (void) CopyMagickString(component,path,magick_length);
1356 else
1357 *component='\0';
1358 break;
1359 }
1360 case RootPath:
1361 {
1362 if (*component != '\0')
1363 {
1364 for (p=component+(strlen(component)-1); p > component; p--)
1365 {
1366 if (IsBasenameSeparator(*p) != MagickFalse)
1367 break;
1368 if (*p == '.')
1369 break;
1370 }
1371 if (*p == '.')
1372 *p='\0';
1373 break;
1374 }
1375 magick_fallthrough;
1376 }
1377 case HeadPath:
1378 {
1379 *p='\0';
1380 break;
1381 }
1382 case TailPath:
1383 {
1384 if (IsBasenameSeparator(*p) != MagickFalse)
1385 (void) CopyMagickString(component,p+1,MagickPathExtent);
1386 break;
1387 }
1388 case BasePath:
1389 {
1390 if (IsBasenameSeparator(*p) != MagickFalse)
1391 (void) CopyMagickString(component,p+1,MagickPathExtent);
1392 if (*component != '\0')
1393 for (p=component+(strlen(component)-1); p > component; p--)
1394 if (*p == '.')
1395 {
1396 *p='\0';
1397 break;
1398 }
1399 break;
1400 }
1401 case BasePathSansCompressExtension:
1402 {
1403 char
1404 extension[MagickPathExtent];
1405
1406 /*
1407 Base path sans any compression extension.
1408 */
1409 GetPathComponent(path,ExtensionPath,extension);
1410 if ((LocaleCompare(extension,"bz2") == 0) ||
1411 (LocaleCompare(extension,"gz") == 0) ||
1412 (LocaleCompare(extension,"svgz") == 0) ||
1413 (LocaleCompare(extension,"wmz") == 0) ||
1414 (LocaleCompare(extension,"Z") == 0))
1415 GetPathComponent(path,BasePath,component);
1416 break;
1417 }
1418 case ExtensionPath:
1419 {
1420 if (IsBasenameSeparator(*p) != MagickFalse)
1421 (void) CopyMagickString(component,p+1,MagickPathExtent);
1422 if (*component != '\0')
1423 for (p=component+strlen(component)-1; p > component; p--)
1424 if (*p == '.')
1425 break;
1426 *component='\0';
1427 if (*p == '.')
1428 (void) CopyMagickString(component,p+1,MagickPathExtent);
1429 break;
1430 }
1431 case SubimagePath:
1432 {
1433 *component='\0';
1434 if ((subimage_length != 0) && (magick_length < subimage_offset))
1435 (void) CopyMagickString(component,path+subimage_offset,subimage_length);
1436 break;
1437 }
1438 case SubcanonicalPath:
1439 case CanonicalPath:
1440 case UndefinedPath:
1441 break;
1442 }
1443}
1444␌
1445/*
1446%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1447% %
1448% %
1449% %
1450% G e t P a t h C o m p o n e n t s %
1451% %
1452% %
1453% %
1454%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1455%
1456% GetPathComponents() returns a list of path components.
1457%
1458% The format of the GetPathComponents method is:
1459%
1460% char **GetPathComponents(const char *path,
1461% size_t *number_components)
1462%
1463% A description of each parameter follows:
1464%
1465% o path: Specifies the string to segment into a list.
1466%
1467% o number_components: return the number of components in the list
1468%
1469*/
1470MagickExport char **GetPathComponents(const char *path,
1471 size_t *number_components)
1472{
1473 char
1474 **components;
1475
1476 const char
1477 *p,
1478 *q;
1479
1480 ssize_t
1481 i;
1482
1483 if (path == (char *) NULL)
1484 return((char **) NULL);
1485 *number_components=1;
1486 for (p=path; *p != '\0'; p++)
1487 if (IsBasenameSeparator(*p))
1488 (*number_components)++;
1489 components=(char **) AcquireQuantumMemory((size_t) *number_components+1UL,
1490 sizeof(*components));
1491 if (components == (char **) NULL)
1492 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1493 p=path;
1494 for (i=0; i < (ssize_t) *number_components; i++)
1495 {
1496 for (q=p; *q != '\0'; q++)
1497 if (IsBasenameSeparator(*q))
1498 break;
1499 components[i]=(char *) AcquireQuantumMemory((size_t) (q-p)+MaxTextExtent,
1500 sizeof(**components));
1501 if (components[i] == (char *) NULL)
1502 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1503 (void) CopyMagickString(components[i],p,(size_t) (q-p+1));
1504 p=q+1;
1505 }
1506 components[i]=(char *) NULL;
1507 return(components);
1508}
1509␌
1510/*
1511%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1512% %
1513% %
1514% %
1515% I s P a t h A c c e s s i b l e %
1516% %
1517% %
1518% %
1519%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1520%
1521% IsPathAccessible() returns MagickTrue if the file as defined by the path is
1522% accessible.
1523%
1524% The format of the IsPathAccessible method is:
1525%
1526% MagickBooleanType IsPathAccessible(const char *path)
1527%
1528% A description of each parameter follows.
1529%
1530% o path: Specifies a path to a file.
1531%
1532*/
1533MagickExport MagickBooleanType IsPathAccessible(const char *path)
1534{
1535 MagickBooleanType
1536 status;
1537
1538 struct stat
1539 attributes;
1540
1541 if ((path == (const char *) NULL) || (*path == '\0'))
1542 return(MagickFalse);
1543 if (LocaleCompare(path,"-") == 0)
1544 return(MagickTrue);
1545 status=GetPathAttributes(path,&attributes);
1546 if (status == MagickFalse)
1547 return(status);
1548 if (S_ISREG(attributes.st_mode) == 0)
1549 return(MagickFalse);
1550 if (access_utf8(path,F_OK) != 0)
1551 return(MagickFalse);
1552 return(MagickTrue);
1553}
1554␌
1555/*
1556%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1557% %
1558% %
1559% %
1560+ I s P a t h D i r e c t o r y %
1561% %
1562% %
1563% %
1564%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1565%
1566% IsPathDirectory() returns -1 if the directory does not exist, 1 is returned
1567% if the path represents a directory otherwise 0.
1568%
1569% The format of the IsPathDirectory method is:
1570%
1571% int IsPathDirectory(const char *path)
1572%
1573% A description of each parameter follows.
1574%
1575% o path: The directory path.
1576%
1577*/
1578static int IsPathDirectory(const char *path)
1579{
1580 MagickBooleanType
1581 status;
1582
1583 struct stat
1584 attributes;
1585
1586 if ((path == (const char *) NULL) || (*path == '\0'))
1587 return(MagickFalse);
1588 status=GetPathAttributes(path,&attributes);
1589 if (status == MagickFalse)
1590 return(-1);
1591 if (S_ISDIR(attributes.st_mode) == 0)
1592 return(0);
1593 return(1);
1594}
1595␌
1596/*
1597%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1598% %
1599% %
1600% %
1601% L i s t F i l e s %
1602% %
1603% %
1604% %
1605%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1606%
1607% ListFiles() reads the directory specified and returns a list of filenames
1608% contained in the directory sorted in ascending alphabetic order.
1609%
1610% The format of the ListFiles function is:
1611%
1612% char **ListFiles(const char *directory,const char *pattern,
1613% ssize_t *number_entries)
1614%
1615% A description of each parameter follows:
1616%
1617% o filelist: Method ListFiles returns a list of filenames contained
1618% in the directory. If the directory specified cannot be read or it is
1619% a file a NULL list is returned.
1620%
1621% o directory: Specifies a pointer to a text string containing a directory
1622% name.
1623%
1624% o pattern: Specifies a pointer to a text string containing a pattern.
1625%
1626% o number_entries: This integer returns the number of filenames in the
1627% list.
1628%
1629*/
1630
1631#if defined(__cplusplus) || defined(c_plusplus)
1632extern "C" {
1633#endif
1634
1635static int FileCompare(const void *x,const void *y)
1636{
1637 const char
1638 **p,
1639 **q;
1640
1641 p=(const char **) x;
1642 q=(const char **) y;
1643 return(LocaleCompare(*p,*q));
1644}
1645
1646#if defined(__cplusplus) || defined(c_plusplus)
1647}
1648#endif
1649
1650MagickExport char **ListFiles(const char *directory,const char *pattern,
1651 size_t *number_entries)
1652{
1653 char
1654 **filelist;
1655
1656 DIR
1657 *current_directory;
1658
1659 struct dirent
1660 *buffer,
1661 *entry;
1662
1663 size_t
1664 max_entries;
1665
1666 /*
1667 Open directory.
1668 */
1669 assert(directory != (const char *) NULL);
1670 assert(pattern != (const char *) NULL);
1671 assert(number_entries != (size_t *) NULL);
1672 if (IsEventLogging() != MagickFalse)
1673 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",directory);
1674 *number_entries=0;
1675 current_directory=opendir(directory);
1676 if (current_directory == (DIR *) NULL)
1677 return((char **) NULL);
1678 /*
1679 Allocate filelist.
1680 */
1681 max_entries=2048;
1682 filelist=(char **) AcquireQuantumMemory((size_t) max_entries,
1683 sizeof(*filelist));
1684 if (filelist == (char **) NULL)
1685 {
1686 (void) closedir(current_directory);
1687 return((char **) NULL);
1688 }
1689 /*
1690 Save the current and change to the new directory.
1691 */
1692 buffer=(struct dirent *) AcquireMagickMemory(sizeof(*buffer)+FILENAME_MAX+1);
1693 if (buffer == (struct dirent *) NULL)
1694 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
1695 while ((MagickReadDirectory(current_directory,buffer,&entry) == 0) &&
1696 (entry != (struct dirent *) NULL))
1697 {
1698 if ((LocaleCompare(entry->d_name,".") == 0) ||
1699 (LocaleCompare(entry->d_name,"..") == 0))
1700 continue;
1701 if ((IsPathDirectory(entry->d_name) > 0) ||
1702#if defined(MAGICKCORE_WINDOWS_SUPPORT)
1703 (GlobExpression(entry->d_name,pattern,MagickTrue) != MagickFalse))
1704#else
1705 (GlobExpression(entry->d_name,pattern,MagickFalse) != MagickFalse))
1706#endif
1707 {
1708 if (*number_entries >= max_entries)
1709 {
1710 /*
1711 Extend the file list.
1712 */
1713 max_entries<<=1;
1714 filelist=(char **) ResizeQuantumMemory(filelist,(size_t)
1715 max_entries,sizeof(*filelist));
1716 if (filelist == (char **) NULL)
1717 break;
1718 }
1719#if defined(vms)
1720 {
1721 char
1722 *p;
1723
1724 p=strchr(entry->d_name,';');
1725 if (p)
1726 *p='\0';
1727 if (*number_entries > 0)
1728 if (LocaleCompare(entry->d_name,filelist[*number_entries-1]) == 0)
1729 continue;
1730 }
1731#endif
1732 filelist[*number_entries]=(char *) AcquireString(entry->d_name);
1733 (*number_entries)++;
1734 }
1735 }
1736 buffer=(struct dirent *) RelinquishMagickMemory(buffer);
1737 (void) closedir(current_directory);
1738 if (filelist == (char **) NULL)
1739 return((char **) NULL);
1740 /*
1741 Sort filelist in ascending order.
1742 */
1743 qsort((void *) filelist,(size_t) *number_entries,sizeof(*filelist),
1744 FileCompare);
1745 return(filelist);
1746}
1747␌
1748/*
1749%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1750% %
1751% %
1752% %
1753% M a g i c k D e l a y %
1754% %
1755% %
1756% %
1757%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1758%
1759% MagickDelay() suspends program execution for the number of milliseconds
1760% specified.
1761%
1762% The format of the Delay method is:
1763%
1764% void MagickDelay(const MagickSizeType milliseconds)
1765%
1766% A description of each parameter follows:
1767%
1768% o milliseconds: Specifies the number of milliseconds to delay before
1769% returning.
1770%
1771*/
1772MagickExport void MagickDelay(const MagickSizeType milliseconds)
1773{
1774 if (milliseconds == 0)
1775 return;
1776#if defined(MAGICKCORE_HAVE_NANOSLEEP)
1777 {
1778 struct timespec
1779 timer;
1780
1781 timer.tv_sec=(time_t) (milliseconds/1000);
1782 timer.tv_nsec=(milliseconds % 1000)*1000*1000;
1783 (void) nanosleep(&timer,(struct timespec *) NULL);
1784 }
1785#elif defined(MAGICKCORE_HAVE_USLEEP)
1786 usleep(1000*milliseconds);
1787#elif defined(MAGICKCORE_HAVE_SELECT)
1788 {
1789 struct timeval
1790 timer;
1791
1792 timer.tv_sec=(long) milliseconds/1000;
1793 timer.tv_usec=(long) (milliseconds % 1000)*1000;
1794 (void) select(0,(XFD_SET *) NULL,(XFD_SET *) NULL,(XFD_SET *) NULL,&timer);
1795 }
1796#elif defined(MAGICKCORE_HAVE_POLL)
1797 (void) poll((struct pollfd *) NULL,0,(int) milliseconds);
1798#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
1799 Sleep((long) milliseconds);
1800#elif defined(vms)
1801 {
1802 float
1803 timer;
1804
1805 timer=milliseconds/1000.0;
1806 lib$wait(&timer);
1807 }
1808#elif defined(__BEOS__)
1809 snooze(1000*milliseconds);
1810#else
1811 {
1812 clock_t
1813 time_end;
1814
1815 time_end=clock()+milliseconds*CLOCKS_PER_SEC/1000;
1816 while (clock() < time_end)
1817 {
1818 }
1819 }
1820#endif
1821}
1822␌
1823/*
1824%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1825% %
1826% %
1827% %
1828% M u l t i l i n e C e n s u s %
1829% %
1830% %
1831% %
1832%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1833%
1834% MultilineCensus() returns the number of lines within a label. A line is
1835% represented by a \n character.
1836%
1837% The format of the MultilineCensus method is:
1838%
1839% size_t MultilineCensus(const char *label)
1840%
1841% A description of each parameter follows.
1842%
1843% o label: This character string is the label.
1844%
1845%
1846*/
1847MagickExport size_t MultilineCensus(const char *label)
1848{
1849 size_t
1850 number_lines;
1851
1852 /*
1853 Determine the number of lines within this label.
1854 */
1855 if (label == (char *) NULL)
1856 return(0);
1857 for (number_lines=1; *label != '\0'; label++)
1858 if (*label == '\n')
1859 number_lines++;
1860 return(number_lines);
1861}
1862␌
1863/*
1864%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1865% %
1866% %
1867% %
1868% S h r e d F i l e %
1869% %
1870% %
1871% %
1872%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1873%
1874% ShredFile() overwrites the specified file with random data. The overwrite
1875% is optional and is only required to help keep the contents of the file
1876% private.
1877%
1878% The format of the ShredFile method is:
1879%
1880% MagickBooleanType ShredFile(const char *path)
1881%
1882% A description of each parameter follows.
1883%
1884% o path: Specifies a path to a file.
1885%
1886*/
1887MagickPrivate MagickBooleanType ShredFile(const char *path)
1888{
1889 int
1890 file,
1891 status;
1892
1893 MagickSizeType
1894 length;
1895
1896 RandomInfo
1897 *random_info;
1898
1899 size_t
1900 quantum;
1901
1902 ssize_t
1903 i;
1904
1905 static ssize_t
1906 passes = -1;
1907
1908 StringInfo
1909 *key;
1910
1911 struct stat
1912 file_stats;
1913
1914 if ((path == (const char *) NULL) || (*path == '\0'))
1915 return(MagickFalse);
1916 if (passes == -1)
1917 {
1918 char
1919 *property;
1920
1921 passes=0;
1922 property=GetEnvironmentValue("MAGICK_SHRED_PASSES");
1923 if (property != (char *) NULL)
1924 {
1925 passes=(ssize_t) StringToInteger(property);
1926 property=DestroyString(property);
1927 }
1928 property=GetPolicyValue("system:shred");
1929 if (property != (char *) NULL)
1930 {
1931 passes=(ssize_t) StringToInteger(property);
1932 property=DestroyString(property);
1933 }
1934 }
1935 if (passes == 0)
1936 return(MagickTrue);
1937 file=open_utf8(path,O_WRONLY | O_EXCL | O_BINARY,S_MODE);
1938 if (file == -1)
1939 return(MagickFalse);
1940 /*
1941 Shred the file.
1942 */
1943 quantum=(size_t) MagickMinBufferExtent;
1944 if ((fstat(file,&file_stats) == 0) && (file_stats.st_size > 0))
1945 quantum=(size_t) MagickMin(file_stats.st_size,MagickMinBufferExtent);
1946 length=(MagickSizeType) file_stats.st_size;
1947 random_info=AcquireRandomInfo();
1948 key=GetRandomKey(random_info,quantum);
1949 for (i=0; i < passes; i++)
1950 {
1951 MagickOffsetType
1952 j;
1953
1954 ssize_t
1955 count;
1956
1957 if (lseek(file,0,SEEK_SET) < 0)
1958 break;
1959 for (j=0; j < (MagickOffsetType) length; j+=count)
1960 {
1961 if (i != 0)
1962 SetRandomKey(random_info,quantum,GetStringInfoDatum(key));
1963 count=write(file,GetStringInfoDatum(key),(size_t)
1964 MagickMin((MagickSizeType) quantum,length-j));
1965 if (count <= 0)
1966 {
1967 count=0;
1968 if (errno != EINTR)
1969 break;
1970 }
1971 }
1972 if (j < (MagickOffsetType) length)
1973 break;
1974 }
1975 key=DestroyStringInfo(key);
1976 random_info=DestroyRandomInfo(random_info);
1977 status=close_utf8(file);
1978 return((status == -1 || i < passes) ? MagickFalse : MagickTrue);
1979}
dirent
Definition mac.h:54