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
|
/****************************************************************************
*
* Program: dir.c
* Author: Marc van Kempen
* desc: Directory routines, sorting and reading
*
* Copyright (c) 1995, Marc van Kempen
*
* All rights reserved.
*
* This software may be used, modified, copied, distributed, and
* sold, in both source and binary form provided that the above
* copyright and these terms are retained, verbatim, as the first
* lines of this file. Under no circumstances is the author
* responsible for the proper functioning of this software, nor does
* the author assume any responsibility for damages incurred with
* its use.
*
****************************************************************************/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h> /* XXX for _POSIX_VERSION ifdefs */
#if !defined sgi && !defined _POSIX_VERSION
#include <sys/dir.h>
#endif
#if defined __sun__
#include <sys/dirent.h>
#endif
#if defined sgi || defined _POSIX_VERSION
#include <dirent.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fnmatch.h>
#include <sys/param.h>
#include "dir.h"
/****************************************************************************
*
* local prototypes
*
****************************************************************************/
void toggle_dotfiles(void);
int show_dotfiles(void);
int dir_alphasort(const void *d1, const void *d2);
int dir_sizesort(const void *d1, const void *d2);
int dir_datesort(const void *d1, const void *d2);
int dir_extsort(const void *d1, const void *d2);
/****************************************************************************
*
* global variables
*
****************************************************************************/
/* This is user-selectable, I've set them fixed for now however */
void *_sort_func = dir_alphasort;
static int _showdotfiles = TRUE;
/****************************************************************************
*
* Functions
*
****************************************************************************/
int
dir_select_nd(
#if defined __linux__
const struct dirent *d
#else
struct dirent *d
#endif
)
/*
* desc: allways include a directory entry <d>, except
* for the current directory and other dot-files
* keep '..' however.
* pre: <d> points to a dirent
* post: returns TRUE if d->d_name != "." else FALSE
*/
{
if (strcmp(d->d_name, ".")==0 ||
(d->d_name[0] == '.' && strlen(d->d_name) > 1 && d->d_name[1] != '.')) {
return(FALSE);
} else {
return(TRUE);
}
}/* dir_select_nd() */
int
dir_select(
#ifdef __linux__
const struct dirent *d
#else
struct dirent *d
#endif
)
/*
* desc: allways include a directory entry <d>, except
* for the current directory
* pre: <d> points to a dirent
* post: returns TRUE if d->d_name != "." else FALSE
*/
{
if (strcmp(d->d_name, ".")==0) { /* don't include the current directory */
return(FALSE);
} else {
return(TRUE);
}
} /* dir_select() */
int
dir_select_root_nd(
#ifdef __linux__
const struct dirent *d
#else
struct dirent *d
#endif
)
/*
* desc: allways include a directory entry <d>, except
* for the current directory and the parent directory.
* Also skip any other dot-files.
* pre: <d> points to a dirent
* post: returns TRUE if d->d_name[0] != "." else FALSE
*/
{
if (d->d_name[0] == '.') { /* don't include the current directory */
return(FALSE); /* nor the parent directory */
} else {
return(TRUE);
}
} /* dir_select_root_nd() */
int
dir_select_root(
#ifdef __linux__
const struct dirent *d
#else
struct dirent *d
#endif
)
/*
* desc: allways include a directory entry <d>, except
* for the current directory and the parent directory
* pre: <d> points to a dirent
* post: returns TRUE if d->d_name[0] != "." else FALSE
*/
{
if (strcmp(d->d_name, ".") == 0 || strcmp(d->d_name, "..") == 0) {
return(FALSE);
} else {
return(TRUE);
}
}/* dir_select_root() */
#ifdef NO_ALPHA_SORT
int
alphasort(const void *d1, const void *d2)
/*
* desc: a replacement for what should be in the library
*/
{
return(strcmp(((struct dirent *) d1)->d_name,
((struct dirent *) d2)->d_name));
} /* alphasort() */
#endif
int
dir_alphasort(const void *d1, const void *d2)
/*
* desc: compare d1 and d2, but put directories always first
* put '..' always on top
*
*/
{
DirList *f1 = ((DirList *) d1),
*f2 = ((DirList *) d2);
struct stat *s1 = &(f1->filestatus);
struct stat *s2 = &(f2->filestatus);
/* check for '..' */
if (strcmp(((DirList *) d1)->filename, "..") == 0) {
return(-1);
}
if (strcmp(((DirList *) d2)->filename, "..") == 0) {
return(1);
}
/* put directories first */
if ((s1->st_mode & S_IFDIR) && (s2->st_mode & S_IFDIR)) {
return(strcmp(f1->filename, f2->filename));
};
if (s1->st_mode & S_IFDIR) {
return(-1);
}
if (s2->st_mode & S_IFDIR) {
return(1);
}
return(strcmp(f1->filename, f2->filename));
} /* dir_alphasort() */
int
dir_sizesort(const void *d1, const void *d2)
/*
* desc: compare d1 and d2, but put directories always first
*
*/
{
DirList *f1 = ((DirList *) d1),
*f2 = ((DirList *) d2);
struct stat *s1 = &(f1->filestatus);
struct stat *s2 = &(f2->filestatus);
/* check for '..' */
if (strcmp(((DirList *) d1)->filename, "..") == 0) {
return(-1);
}
if (strcmp(((DirList *) d2)->filename, "..") == 0) {
return(1);
}
/* put directories first */
if ((s1->st_mode & S_IFDIR) && (s2->st_mode & S_IFDIR)) {
return(s1->st_size < s2->st_size ?
-1
:
s1->st_size >= s2->st_size);
};
if (s1->st_mode & S_IFDIR) {
return(-1);
}
if (s2->st_mode & S_IFDIR) {
return(1);
}
return(s1->st_size < s2->st_size ?
-1
:
s1->st_size >= s2->st_size);
} /* dir_sizesort() */
int
dir_datesort(const void *d1, const void *d2)
/*
* desc: compare d1 and d2 on date, but put directories always first
*/
{
DirList *f1 = ((DirList *) d1),
*f2 = ((DirList *) d2);
struct stat *s1 = &(f1->filestatus);
struct stat *s2 = &(f2->filestatus);
/* check for '..' */
if (strcmp(((DirList *) d1)->filename, "..") == 0) {
return(-1);
}
if (strcmp(((DirList *) d2)->filename, "..") == 0) {
return(1);
}
/* put directories first */
if ((s1->st_mode & S_IFDIR) && (s2->st_mode & S_IFDIR)) {
return(s1->st_mtime < s2->st_mtime ?
-1
:
s1->st_mtime >= s2->st_mtime);
};
if (s1->st_mode & S_IFDIR) {
return(-1);
}
if (s2->st_mode & S_IFDIR) {
return(1);
}
return(s1->st_mtime < s2->st_mtime ?
-1
:
s1->st_mtime >= s2->st_mtime);
} /* dir_datesort() */
int
null_strcmp(char *s1, char *s2)
/*
* desc: compare strings allowing NULL pointers
*/
{
if ((s1 == NULL) && (s2 == NULL)) {
return(0);
}
if (s1 == NULL) {
return(-1);
}
if (s2 == NULL) {
return(1);
}
return(strcmp(s1, s2));
} /* null_strcmp() */
int
dir_extsort(const void *d1, const void *d2)
/*
* desc: compare d1 and d2 on extension, but put directories always first
* extension = "the characters after the last dot in the filename"
* pre: d1 and d2 are pointers to DirList type records
* post: see code
*/
{
DirList *f1 = ((DirList *) d1),
*f2 = ((DirList *) d2);
struct stat *s1 = &(f1->filestatus);
struct stat *s2 = &(f2->filestatus);
char *ext1, *ext2;
int extf, ret;
/* check for '..' */
if (strcmp(((DirList *) d1)->filename, "..") == 0) {
return(-1);
}
if (strcmp(((DirList *) d2)->filename, "..") == 0) {
return(1);
}
/* find the first extension */
ext1 = f1->filename + strlen(f1->filename);
extf = FALSE;
while (!extf && (ext1 > f1->filename)) {
extf = (*--ext1 == '.');
}
if (!extf) {
ext1 = NULL;
} else {
ext1++;
}
/* ext1 == NULL if there's no "extension" else ext1 points */
/* to the first character of the extension string */
/* find the second extension */
ext2 = f2->filename + strlen(f2->filename);
extf = FALSE;
while (!extf && (ext2 > f2->filename)) {
extf = (*--ext2 == '.');
}
if (!extf) {
ext2 = NULL;
} else {
ext2++;
}
/* idem as for ext1 */
if ((s1->st_mode & S_IFDIR) && (s2->st_mode & S_IFDIR)) {
ret = null_strcmp(ext1, ext2);
if (ret == 0) {
return(strcmp(f1->filename, f2->filename));
} else {
return(ret);
}
};
if (s1->st_mode & S_IFDIR) {
return(-1);
}
if (s2->st_mode & S_IFDIR) {
return(1);
}
ret = null_strcmp(ext1, ext2);
if (ret == 0) {
return(strcmp(f1->filename, f2->filename));
} else {
return(ret);
}
} /* dir_extsort() */
void
get_dir(char *dirname, char *fmask, DirList **dir, int *n)
/*
* desc: get the files in the current directory
* pre: <dir> == NULL
* post: <dir> contains <n> dir-entries
*/
{
char cwd[MAXPATHLEN];
char buf[256];
struct dirent **dire;
struct stat status;
int i, j, nb;
long d;
getcwd(cwd, MAXPATHLEN);
if (strcmp(cwd, "/") == 0) { /* we are in the root directory */
if (show_dotfiles()) {
*n = scandir(dirname, &dire, dir_select_root, alphasort);
} else {
*n = scandir(dirname, &dire, dir_select_root_nd, alphasort);
}
} else {
if (show_dotfiles()) {
*n = scandir(dirname, &dire, dir_select, alphasort);
} else {
*n = scandir(dirname, &dire, dir_select_nd, alphasort);
}
}
/* There is the possibility that we have entered a directory */
/* which we are not allowed to read, scandir thus returning */
/* -1 for *n. */
/* Actually I should also check for lack of memory, but I'll */
/* let my application happily crash if this is the case */
/* Solution: */
/* manually insert the parent directory as the only */
/* directory entry, and return. */
if (*n == -1) {
*n = 1;
*dir = (DirList *) malloc(sizeof(DirList));
strcpy((*dir)[0].filename, "..");
lstat("..", &status);
(*dir)[0].filestatus = status;
(*dir)[0].link = FALSE;
return;
}
*dir = (DirList *) malloc( *n * sizeof(DirList) );
d = 0;
i = 0;
j = 0;
while (j<*n) {
lstat(dire[j]->d_name, &status);
/* check if this file is to be included */
/* always include directories, the rest is subject to fmask */
if (S_ISDIR(status.st_mode)
|| fnmatch(fmask, dire[j]->d_name, FNM_NOESCAPE) != FNM_NOMATCH) {
strcpy((*dir)[i].filename, dire[j]->d_name);
(*dir)[i].filestatus = status;
if ((S_IFMT & status.st_mode) == S_IFLNK) { /* handle links */
(*dir)[i].link = TRUE;
stat(dire[j]->d_name, &status);
nb = readlink(dire[j]->d_name, buf, 256);
if (nb == -1) {
printf("get_dir(): Error reading link: %s\n", dire[j]->d_name);
exit(-1);
} else {
(*dir)[i].linkname = malloc(sizeof(char) * nb + 1);
strncpy((*dir)[i].linkname, buf, nb);
(*dir)[i].linkname[nb] = 0;
}
(*dir)[i].filestatus = status;
} else {
(*dir)[i].link = FALSE;
(*dir)[i].linkname = NULL;
}
i++;
} else {
/* skip this entry */
}
j++;
}
*n = i;
/* sort the directory with the directory names on top */
qsort((*dir), *n, sizeof(DirList), _sort_func);
/* Free the allocated memory */
for (i=0; i<*n; i++) {
free(dire[i]);
}
free(dire);
return;
}/* get_dir() */
void
FreeDir(DirList *d, int n)
/*
* desc: free the dirlist d
* pre: d != NULL
* post: memory allocated to d has been released
*/
{
int i;
if (d) {
for (i=0; i<n; i++) {
if (d[i].linkname) {
free(d[i].linkname);
}
}
free(d);
} else {
printf("dir.c:FreeDir(): d == NULL\n");
exit(-1);
}
return;
} /* FreeDir() */
void
toggle_dotfiles(void)
/*
* desc: toggle visibility of dot-files
*/
{
_showdotfiles = !_showdotfiles;
return;
} /* toggle_dotfiles() */
int
show_dotfiles(void)
/*
* desc: return the value of _showdotfiles
*/
{
return(_showdotfiles);
} /* show_dotfiles() */
void
set_dotfiles(int b)
/*
* desc: set the value of _showdotfiles
*/
{
_showdotfiles = b;
return;
} /* set_dotfiles() */
|