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
|
/* Copyright (C) 1992-1998,2000,2002,2003,2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <bits/libc-lock.h>
#ifndef SCANDIR
#define SCANDIR scandir
#define READDIR __readdir
#define DIRENT_TYPE struct dirent
#endif
#ifndef SCANDIR_CANCEL
#define SCANDIR_CANCEL
struct scandir_cancel_struct
{
DIR *dp;
void *v;
size_t cnt;
};
static void
cancel_handler (void *arg)
{
struct scandir_cancel_struct *cp = arg;
size_t i;
void **v = cp->v;
for (i = 0; i < cp->cnt; ++i)
free (v[i]);
free (v);
(void) __closedir (cp->dp);
}
#endif
int
SCANDIR (dir, namelist, select, cmp)
const char *dir;
DIRENT_TYPE ***namelist;
int (*select) (const DIRENT_TYPE *);
int (*cmp) (const DIRENT_TYPE **, const DIRENT_TYPE **);
{
DIR *dp = __opendir (dir);
DIRENT_TYPE **v = NULL;
size_t vsize = 0;
struct scandir_cancel_struct c;
DIRENT_TYPE *d;
int save;
if (dp == NULL)
return -1;
save = errno;
__set_errno (0);
c.dp = dp;
c.v = NULL;
c.cnt = 0;
__libc_cleanup_push (cancel_handler, &c);
while ((d = READDIR (dp)) != NULL)
{
int use_it = select == NULL;
if (! use_it)
{
use_it = select (d);
/* The select function might have changed errno. It was
zero before and it need to be again to make the latter
tests work. */
__set_errno (0);
}
if (use_it)
{
DIRENT_TYPE *vnew;
size_t dsize;
/* Ignore errors from select or readdir */
__set_errno (0);
if (__builtin_expect (c.cnt == vsize, 0))
{
DIRENT_TYPE **new;
if (vsize == 0)
vsize = 10;
else
vsize *= 2;
new = (DIRENT_TYPE **) realloc (v, vsize * sizeof (*v));
if (new == NULL)
break;
v = new;
c.v = (void *) v;
}
dsize = &d->d_name[_D_ALLOC_NAMLEN (d)] - (char *) d;
vnew = (DIRENT_TYPE *) malloc (dsize);
if (vnew == NULL)
break;
v[c.cnt++] = (DIRENT_TYPE *) memcpy (vnew, d, dsize);
}
}
if (__builtin_expect (errno, 0) != 0)
{
save = errno;
while (c.cnt > 0)
free (v[--c.cnt]);
free (v);
c.cnt = -1;
}
else
{
/* Sort the list if we have a comparison function to sort with. */
if (cmp != NULL)
qsort (v, c.cnt, sizeof (*v),
(int (*) (const void *, const void *)) cmp);
*namelist = v;
}
__libc_cleanup_pop (0);
(void) __closedir (dp);
__set_errno (save);
return c.cnt;
}
|
