-
Notifications
You must be signed in to change notification settings - Fork 1
/
file.c
1200 lines (1071 loc) · 28.7 KB
/
file.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* file: file.c
* description: handle all file based efuns
*/
#include "std.h"
#include "file.h"
#include "comm.h"
#include "lex.h"
#include "md.h"
#include "port.h"
#include "master.h"
#ifdef PACKAGE_COMPRESS
#include <zlib.h>
#endif
int legal_path (const char *);
static int match_string (char *, char *);
static int copy (const char *from, const char *to);
static int do_move (const char *from, const char *to, int flag);
static int CDECL pstrcmp (CONST void *, CONST void *);
static int CDECL parrcmp (CONST void *, CONST void *);
static void encode_stat (svalue_t *, int, char *, struct stat *);
#define MAX_LINES 50
/*
* These are used by qsort in get_dir().
*/
static int CDECL pstrcmp (CONST void * p1, CONST void * p2)
{
svalue_t *x = (svalue_t *)p1;
svalue_t *y = (svalue_t *)p2;
return strcmp(x->u.string, y->u.string);
}
static int CDECL parrcmp (CONST void * p1, CONST void * p2)
{
svalue_t *x = (svalue_t *)p1;
svalue_t *y = (svalue_t *)p2;
return strcmp(x->u.arr->item[0].u.string, y->u.arr->item[0].u.string);
}
static void encode_stat (svalue_t * vp, int flags, char * str, struct stat * st)
{
if (flags == -1) {
array_t *v = allocate_empty_array(3);
v->item[0].type = T_STRING;
v->item[0].subtype = STRING_MALLOC;
v->item[0].u.string = string_copy(str, "encode_stat");
v->item[1].type = T_NUMBER;
v->item[1].u.number =
((st->st_mode & S_IFDIR) ? -2 : st->st_size);
v->item[2].type = T_NUMBER;
v->item[2].u.number = st->st_mtime;
vp->type = T_ARRAY;
vp->u.arr = v;
} else {
vp->type = T_STRING;
vp->subtype = STRING_MALLOC;
vp->u.string = string_copy(str, "encode_stat");
}
}
/*
* List files in directory. This function do same as standard list_files did,
* but instead writing files right away to user this returns an array
* containing those files. Actually most of code is copied from list_files()
* function.
* Differences with list_files:
*
* - file_list("/w"); returns ({ "w" })
*
* - file_list("/w/"); and file_list("/w/."); return contents of directory
* "/w"
*
* - file_list("/");, file_list("."); and file_list("/."); return contents
* of directory "/"
*
* With second argument equal to non-zero, instead of returning an array
* of strings, the function will return an array of arrays about files.
* The information in each array is supplied in the order:
* name of file,
* size of file,
* last update of file.
*/
/* WIN32 should be fixed to do this correctly (i.e. no ifdefs for it) */
#define MAX_FNAME_SIZE 255
#define MAX_PATH_LEN 1024
array_t *get_dir (const char * path, int flags)
{
array_t *v;
int i, count = 0;
#ifndef WIN32
DIR *dirp;
#endif
int namelen, do_match = 0;
#ifndef WIN32
#ifdef USE_STRUCT_DIRENT
struct dirent *de;
#else
struct direct *de;
#endif
#endif
struct stat st;
char *endtemp;
char temppath[MAX_FNAME_SIZE + MAX_PATH_LEN + 2];
char regexppath[MAX_FNAME_SIZE + MAX_PATH_LEN + 2];
char *p;
#ifdef WIN32
struct _finddata_t FindBuffer;
long FileHandle, FileCount;
#endif
if (!path)
return 0;
path = check_valid_path(path, current_object, "stat", 0);
if (path == 0)
return 0;
if (strlen(path) < 2) {
temppath[0] = path[0] ? path[0] : '.';
temppath[1] = '\000';
p = temppath;
} else {
strncpy(temppath, path, MAX_FNAME_SIZE + MAX_PATH_LEN + 1);
temppath[MAX_FNAME_SIZE + MAX_PATH_LEN + 1] = '\0';
/*
* If path ends with '/' or "/." remove it
*/
if ((p = strrchr(temppath, '/')) == 0)
p = temppath;
if (p[0] == '/' && ((p[1] == '.' && p[2] == '\0') || p[1] == '\0'))
*p = '\0';
}
if (stat(temppath, &st) < 0) {
if (*p == '\0')
return 0;
if (p != temppath) {
strcpy(regexppath, p + 1);
*p = '\0';
} else {
strcpy(regexppath, p);
strcpy(temppath, ".");
}
do_match = 1;
} else if (*p != '\0' && strcmp(temppath, ".")) {
if (*p == '/' && *(p + 1) != '\0')
p++;
v = allocate_empty_array(1);
encode_stat(&v->item[0], flags, p, &st);
return v;
}
#ifdef WIN32
FileHandle = -1;
FileCount = 1;
/* strcat(temppath, "\\*"); */
strcat(temppath, "/*");
if ((FileHandle = _findfirst(temppath, &FindBuffer)) == -1) return 0;
#else
if ((dirp = opendir(temppath)) == 0)
return 0;
#endif
/*
* Count files
*/
#ifdef WIN32
do {
if (!do_match && (!strcmp(FindBuffer.name, ".") ||
!strcmp(FindBuffer.name, ".."))) {
continue;
}
if (do_match && !match_string(regexppath, FindBuffer.name)) {
continue;
}
count++;
if (count >= max_array_size) {
break;
}
} while (!_findnext(FileHandle, &FindBuffer));
_findclose(FileHandle);
#else
for (de = readdir(dirp); de; de = readdir(dirp)) {
#ifdef USE_STRUCT_DIRENT
namelen = strlen(de->d_name);
#else
namelen = de->d_namlen;
#endif
if (!do_match && (strcmp(de->d_name, ".") == 0 ||
strcmp(de->d_name, "..") == 0))
continue;
if (do_match && !match_string(regexppath, de->d_name))
continue;
count++;
if (count >= max_array_size)
break;
}
#endif
/*
* Make array and put files on it.
*/
v = allocate_empty_array(count);
if (count == 0) {
/* This is the easy case :-) */
#ifndef WIN32
closedir(dirp);
#endif
return v;
}
#ifdef WIN32
FileHandle = -1;
if ((FileHandle = _findfirst(temppath, &FindBuffer)) == -1) return 0;
endtemp = temppath + strlen(temppath) - 2;
*endtemp = 0;
/* strcat(endtemp++, "\\"); */
strcat(endtemp++, "/");
i = 0;
do {
if (!do_match && (!strcmp(FindBuffer.name, ".") ||
!strcmp(FindBuffer.name, ".."))) continue;
if (do_match && !match_string(regexppath, FindBuffer.name)) continue;
if (flags == -1) {
strcpy(endtemp, FindBuffer.name);
stat(temppath, &st);
}
encode_stat(&v->item[i], flags, FindBuffer.name, &st);
i++;
} while (!_findnext(FileHandle, &FindBuffer));
_findclose(FileHandle);
#else /* WIN32 */
rewinddir(dirp);
endtemp = temppath + strlen(temppath);
strcat(endtemp++, "/");
for (i = 0, de = readdir(dirp); i < count; de = readdir(dirp)) {
#ifdef USE_STRUCT_DIRENT
namelen = strlen(de->d_name);
#else
namelen = de->d_namlen;
#endif
if (!do_match && (strcmp(de->d_name, ".") == 0 ||
strcmp(de->d_name, "..") == 0))
continue;
if (do_match && !match_string(regexppath, de->d_name))
continue;
de->d_name[namelen] = '\0';
if (flags == -1) {
/*
* We'll have to .... sigh.... stat() the file to get some add'tl
* info.
*/
strcpy(endtemp, de->d_name);
stat(temppath, &st);/* We assume it works. */
}
encode_stat(&v->item[i], flags, de->d_name, &st);
i++;
}
closedir(dirp);
#endif /* OS2 */
/* Sort the names. */
qsort((void *) v->item, count, sizeof v->item[0],
(flags == -1) ? parrcmp : pstrcmp);
return v;
}
int remove_file (const char * path)
{
path = check_valid_path(path, current_object, "remove_file", 1);
if (path == 0)
return 0;
if (unlink(path) == -1)
return 0;
return 1;
}
/*
* Check that it is an legal path. No '..' are allowed.
*/
int legal_path (const char * path)
{
const char *p;
if (path == NULL)
return 0;
if (path[0] == '/')
return 0;
/*
* disallowing # seems the easiest way to solve a bug involving loading
* files containing that character
*/
if (strchr(path, '#')) {
return 0;
}
p = path;
while (p) { /* Zak, 930530 - do better checking */
if (p[0] == '.') {
if (p[1] == '\0') /* trailing `.' ok */
break;
if (p[1] == '.') /* check for `..' or `../' */
p++;
if (p[1] == '/' || p[1] == '\0')
return 0; /* check for `./', `..', or `../' */
}
p = (char *)strstr(p, "/."); /* search next component */
if (p)
p++; /* step over `/' */
}
#if defined(WIN32)
/*
* I don't know what the proper define should be, just leaving an
* appropriate place for the right stuff to happen here - Wayfarer
*/
/* Could be a drive thingy for os2. */
if (strchr(path, ':'))
return 0;
#endif
return 1;
} /* legal_path() */
/*
* There is an error in a specific file. Ask the MudOS driver to log the
* message somewhere.
*/
void smart_log (const char * error_file, int line, const char * what, int flag)
{
char *buff;
svalue_t *mret;
extern int pragmas;
buff = (char *)
DMALLOC(strlen(error_file) + strlen(what) +
((pragmas & PRAGMA_ERROR_CONTEXT) ? 100 : 40), TAG_TEMPORARY, "smart_log: 1");
if (flag)
sprintf(buff, "/%s line %d: Warning: %s", error_file, line, what);
else
sprintf(buff, "/%s line %d: %s", error_file, line, what);
if (pragmas & PRAGMA_ERROR_CONTEXT) {
char *ls = strrchr(buff, '\n');
unsigned char *tmp;
if (ls) {
tmp = (unsigned char *)ls + 1;
while (*tmp && isspace(*tmp)) tmp++;
if (!*tmp) *ls = 0;
}
strcat(buff, show_error_context());
} else strcat(buff, "\n");
push_malloced_string(add_slash(error_file));
copy_and_push_string(buff);
mret = safe_apply_master_ob(APPLY_LOG_ERROR, 2);
if (!mret || mret == (svalue_t *)-1) {
debug_message("%s", buff);
}
FREE(buff);
} /* smart_log() */
/*
* Append string to file. Return 0 for failure, otherwise 1.
*/
int write_file (const char * file, const char * str, int flags)
{
FILE *f;
#ifdef PACKAGE_COMPRESS
gzFile gf;
#endif
#ifdef WIN32
char fmode[3];
#endif
file = check_valid_path(file, current_object, "write_file", 1);
if (!file)
return 0;
#ifdef PACKAGE_COMPRESS
if(flags & 2){
gf = gzopen(file, (flags & 1)?"w":"a");
if(!gf)
error("Wrong permissions for opening file /%s for %s.\n\"%s\"\n",
file, (flags & 1) ? "overwrite" : "append", port_strerror(errno));
} else {
#endif
#ifdef WIN32
fmode[0] = (flags & 1) ? 'w' : 'a';
fmode[1] = 't';
fmode[2] = '\0';
f = fopen(file, fmode);
#else
f = fopen(file, (flags & 1) ? "w" : "a");
#endif
if (f == 0) {
error("Wrong permissions for opening file /%s for %s.\n\"%s\"\n",
file, (flags & 1) ? "overwrite" : "append", port_strerror(errno));
}
#ifdef PACKAGE_COMPRESS
}
if(flags & 2){
gzwrite(gf, str, strlen(str));
}else
#endif
fwrite(str, strlen(str), 1, f);
#ifdef PACKAGE_COMPRESS
if(flags & 2)
gzclose(gf);
else
#endif
fclose(f);
return 1;
}
char *read_file(const char * file, int start, int len) {
struct stat st;
#ifndef PACKAGE_COMPRESS
FILE *f;
#else
gzFile f;
#endif
int chunk;
char *str, *p, *p2;
if (len < 0)
return 0;
file = check_valid_path(file, current_object, "read_file", 0);
if (!file)
return 0;
/*
* file doesn't exist, or is really a directory
*/
if (stat(file, &st) == -1 || (st.st_mode & S_IFDIR))
return 0;
#ifndef PACKAGE_COMPRESS
f = fopen(file, FOPEN_READ);
#else
f = gzopen(file, "rb");
#endif
if (f == 0)
return 0;
if (start < 1)
start = 1;
if (len == 0)
len = 2*READ_FILE_MAX_SIZE;
str = new_string(2*READ_FILE_MAX_SIZE, "read_file: str");
if (st.st_size== 0) {
/* zero length file */
str[0] = 0;
#ifndef PACKAGE_COMPRESS
fclose(f);
#else
gzclose(f);
#endif
str = extend_string(str, 0); /* fix string length */
return str;
}
do {
#ifndef PACKAGE_COMPRESS
chunk = fread(str, 1, 2*READ_FILE_MAX_SIZE, f);
#else
chunk = gzread(f, str, 2*READ_FILE_MAX_SIZE);
#endif
if (chunk < 1)
goto free_str;
p = str;
while (start > 1) {
/* skip newlines */
p2 = (char *)memchr(p, '\n', 2*READ_FILE_MAX_SIZE+str-p);
if (p2) {
p = p2 + 1;
start--;
} else
break;
}
} while (start > 1);
p2 = str;
while (1) {
char c;
c = *p++;
if (p-str > chunk) {
if (chunk == 2*READ_FILE_MAX_SIZE) {
goto free_str; //file too big
} else
break; //reached the end
}
if (p2-str > READ_FILE_MAX_SIZE)
goto free_str; //file too big
if (c == '\0') {
FREE_MSTR(str);
#ifndef PACKAGE_COMPRESS
fclose(f);
#else
gzclose(f);
#endif
error("Attempted to read '\\0' into string!\n");
}
if (c != '\r' || *p != '\n') {
*p2++ = c;
if (c == '\n' && --len == 0)
break; /* done */
}
}
*p2 = 0;
str = extend_string(str, p2 - str); /* fix string length */
#ifndef PACKAGE_COMPRESS
fclose(f);
#else
gzclose(f);
#endif
return str;
/* Error path: unwind allocated resources */
free_str:
FREE_MSTR(str);
#ifndef PACKAGE_COMPRESS
fclose(f);
#else
gzclose(f);
#endif
return 0;
}
char *read_bytes (const char * file, int start, int len, int * rlen)
{
struct stat st;
FILE *fptr;
char *str;
int size;
if (len < 0)
return 0;
file = check_valid_path(file, current_object,
"read_bytes", 0);
if (!file)
return 0;
fptr = fopen(file, "rb");
if (fptr == NULL)
return 0;
if (fstat(fileno(fptr), &st) == -1)
fatal("Could not stat an open file.\n");
size = st.st_size;
if (start < 0)
start = size + start;
if (len == 0)
len = size;
if (len > MAX_BYTE_TRANSFER) {
fclose(fptr);
error("Transfer exceeded maximum allowed number of bytes.\n");
return 0;
}
if (start >= size) {
fclose(fptr);
return 0;
}
if ((start + len) > size)
len = (size - start);
if ((size = fseek(fptr, start, 0)) < 0) {
fclose(fptr);
return 0;
}
str = new_string(len, "read_bytes: str");
size = fread(str, 1, len, fptr);
fclose(fptr);
if (size <= 0) {
FREE_MSTR(str);
return 0;
}
/*
* The string has to end to '\0'!!!
*/
str[size] = '\0';
*rlen = size;
return str;
}
int write_bytes (const char * file, int start, const char * str, int theLength)
{
struct stat st;
int size;
FILE *fptr;
file = check_valid_path(file, current_object, "write_bytes", 1);
if (!file)
return 0;
if (theLength > MAX_BYTE_TRANSFER)
return 0;
/* Under system V, it isn't possible change existing data in a file
* opened for append, so it can't be opened for append.
* opening for r+ won't create the file if it doesn't exist.
* opening for w or w+ will truncate it if it does exist. So we
* have to check if it exists first.
*/
if (stat(file, &st) == -1) {
fptr = fopen(file, "wb");
} else {
fptr = fopen(file, "r+b");
}
if (fptr == NULL) {
return 0;
}
if (fstat(fileno(fptr), &st) == -1)
fatal("Could not stat an open file.\n");
size = st.st_size;
if (start < 0)
start = size + start;
if (start < 0 || start > size) {
fclose(fptr);
return 0;
}
if ((size = fseek(fptr, start, 0)) < 0) {
fclose(fptr);
return 0;
}
size = fwrite(str, 1, theLength, fptr);
fclose(fptr);
if (size <= 0) {
return 0;
}
return 1;
}
int file_size (const char * file)
{
struct stat st;
long ret;
#ifdef WIN32
char *t;
int needs_free = 0, len;
const char *p;
#endif
file = check_valid_path(file, current_object, "file_size", 0);
if (!file)
return -1;
#ifdef WIN32
len = strlen(file);
p = file + len - 1;
if (*p == '/') {
needs_free = 1;
p = file;
t = new_string(len - 1, "file_size");
memcpy(t, p, len - 1);
t[len-1] = 0;
file = t;
}
#endif
if (stat(file, &st) == -1)
ret = -1;
else if (S_IFDIR & st.st_mode)
ret = -2;
else
ret = st.st_size;
#ifdef WIN32
if (needs_free) FREE_MSTR(file);
#endif
return ret;
}
/*
* Check that a path to a file is valid for read or write.
* This is done by functions in the master object.
* The path is always treated as an absolute path, and is returned without
* a leading '/'.
* If the path was '/', then '.' is returned.
* Otherwise, the returned path is temporarily allocated by apply(), which
* means it will be deallocated at next apply().
*/
const char *check_valid_path (const char * path, object_t * call_object, const char * const call_fun, int writeflg)
{
svalue_t *v;
if(!master_ob && !call_object){
//early startup, ignore security
extern svalue_t apply_ret_value;
free_svalue(&apply_ret_value, "check_valid_path");
apply_ret_value.type = T_STRING;
apply_ret_value.subtype = STRING_MALLOC;
path = apply_ret_value.u.string = string_copy(path, "check_valid_path");
return path;
}
if (call_object == 0 || call_object->flags & O_DESTRUCTED)
return 0;
#ifdef WIN32
{
char *p;
for(p=path; *p; p++) if (*p == '\\') *p='/';
}
#endif
copy_and_push_string(path);
push_object(call_object);
push_constant_string(call_fun);
if (writeflg)
v = apply_master_ob(APPLY_VALID_WRITE, 3);
else
v = apply_master_ob(APPLY_VALID_READ, 3);
if (v == (svalue_t *)-1)
v = 0;
if (v && v->type == T_NUMBER && v->u.number == 0) return 0;
if (v && v->type == T_STRING) {
path = v->u.string;
} else {
extern svalue_t apply_ret_value;
free_svalue(&apply_ret_value, "check_valid_path");
apply_ret_value.type = T_STRING;
apply_ret_value.subtype = STRING_MALLOC;
path = apply_ret_value.u.string = string_copy(path, "check_valid_path");
}
if (path[0] == '/')
path++;
if (path[0] == '\0')
path = ".";
if (legal_path(path))
return path;
return 0;
}
static int match_string (char * match, char * str)
{
int i;
again:
if (*str == '\0' && *match == '\0')
return 1;
switch (*match) {
case '?':
if (*str == '\0')
return 0;
str++;
match++;
goto again;
case '*':
match++;
if (*match == '\0')
return 1;
for (i = 0; str[i] != '\0'; i++)
if (match_string(match, str + i))
return 1;
return 0;
case '\0':
return 0;
case '\\':
match++;
if (*match == '\0')
return 0;
/* Fall through ! */
default:
if (*match == *str) {
match++;
str++;
goto again;
}
return 0;
}
}
static struct stat to_stats, from_stats;
static int copy (const char * from, const char * to)
{
int ifd;
int ofd;
char buf[1024 * 8];
int len; /* Number of bytes read into `buf'. */
if (!S_ISREG(from_stats.st_mode)) {
return 1;
}
if (unlink(to) && errno != ENOENT) {
return 1;
}
ifd = open(from, OPEN_READ);
if (ifd < 0) {
return errno;
}
ofd = open(to, OPEN_WRITE | O_CREAT | O_TRUNC, 0666);
if (ofd < 0) {
close(ifd);
return 1;
}
#ifdef HAS_FCHMOD
if (fchmod(ofd, from_stats.st_mode & 0777)) {
close(ifd);
close(ofd);
unlink(to);
return 1;
}
#endif
while ((len = read(ifd, buf, sizeof(buf))) > 0) {
int wrote = 0;
char *bp = buf;
do {
wrote = write(ofd, bp, len);
if (wrote < 0) {
close(ifd);
close(ofd);
unlink(to);
return 1;
}
bp += wrote;
len -= wrote;
} while (len > 0);
}
if (len < 0) {
close(ifd);
close(ofd);
unlink(to);
return 1;
}
if (close(ifd) < 0) {
close(ofd);
return 1;
}
if (close(ofd) < 0) {
return 1;
}
#ifdef FCHMOD_MISSING
if (chmod(to, from_stats.st_mode & 0777)) {
return 1;
}
#endif
return 0;
}
/* Move FROM onto TO. Handles cross-filesystem moves.
If TO is a directory, FROM must be also.
Return 0 if successful, 1 if an error occurred. */
#ifdef F_RENAME
static int do_move (const char * from, const char * to, int flag)
{
if (lstat(from, &from_stats) != 0) {
error("/%s: lstat failed\n", from);
return 1;
}
if (lstat(to, &to_stats) == 0) {
#ifdef WIN32
if (!strcmp(from, to))
#else
if (from_stats.st_dev == to_stats.st_dev
&& from_stats.st_ino == to_stats.st_ino)
#endif
{
error("`/%s' and `/%s' are the same file", from, to);
return 1;
}
if (S_ISDIR(to_stats.st_mode)) {
error("/%s: cannot overwrite directory", to);
return 1;
}
#ifdef WIN32
unlink(to);
#endif
} else if (errno != ENOENT) {
error("/%s: unknown error\n", to);
return 1;
}
#ifdef SYSV
if ((flag == F_RENAME) && file_size(from) == -2) {
char cmd_buf[100];
sprintf(cmd_buf, "/usr/lib/mv_dir %s %s", from, to);
return system(cmd_buf);
} else
#endif /* SYSV */
if ((flag == F_RENAME) && (rename(from, to) == 0))
return 0;
#ifdef F_LINK
else if (flag == F_LINK) {
#ifdef WIN32
error("link() not supported.\n");
#else
if (link(from, to) == 0)
return 0;
#endif
}
#endif
if (errno != EXDEV) {
if (flag == F_RENAME)
error("cannot move `/%s' to `/%s'\n", from, to);
else
error("cannot link `/%s' to `/%s'\n", from, to);
return 1;
}
/* rename failed on cross-filesystem link. Copy the file instead. */
if (flag == F_RENAME) {
if (copy(from, to))
return 1;
if (unlink(from)) {
error("cannot remove `/%s'", from);
return 1;
}
}
#ifdef F_LINK
else if (flag == F_LINK) {
if (symlink(from, to) == 0) /* symbolic link */
return 0;
}
#endif
return 0;
}
#endif
void debug_perror (const char * what, const char * file) {
if (file)
debug_message("System Error: %s:%s:%s\n", what, file, port_strerror(errno));
else
debug_message("System Error: %s:%s\n", what, port_strerror(errno));
}
/*
* do_rename is used by the efun rename. It is basically a combination
* of the unix system call rename and the unix command mv.
*/
static svalue_t from_sv = { T_NUMBER };
static svalue_t to_sv = { T_NUMBER };
#ifdef DEBUGMALLOC_EXTENSIONS
void mark_file_sv() {
mark_svalue(&from_sv);
mark_svalue(&to_sv);
}
#endif
#ifdef F_RENAME
int do_rename (const char * fr, const char * t, int flag)
{
const char *from;
const char *to;
char newfrom[MAX_FNAME_SIZE + MAX_PATH_LEN + 2];
int flen;
extern svalue_t apply_ret_value;
/*
* important that the same write access checks are done for link() as are
* done for rename(). Otherwise all kinds of security problems would
* arise (e.g. creating links to files in protected directories and then
* modifying the protected file by modifying the linked file). The idea
* is prevent linking to a file unless the person doing the linking has
* permission to move the file.
*/
from = check_valid_path(fr, current_object, "rename", 1);
if (!from)
return 1;