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
|
/*
* Copyright (c) 2003 Gunnar Ritter
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute
* it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
/* Sccsid @(#)getdir.c 1.20 (gritter) 5/14/06 */
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <dirent.h>
#include "getdir.h"
#define DIBSIZE 5120
struct getdb {
#if !defined (__FreeBSD__) && !defined (__NetBSD__) && !defined (__OpenBSD__) \
&& !defined (__DragonFly__) && !defined (__APPLE__)
off_t g_offs;
#else /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
long g_offs;
#endif /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
struct dirent *g_dirp;
const char *g_path;
struct direc g_dic;
union {
char g_dirbuf[DIBSIZE+1];
struct dirent g_dummy[1];
} g_u;
int g_num;
int g_fd;
};
struct getdb *
getdb_alloc(const char *path, int fd)
{
struct getdb *db;
if ((db = malloc(sizeof *db)) == NULL)
return NULL;
db->g_dirp = NULL;
db->g_offs = 0;
db->g_fd = fd;
db->g_path = path;
return db;
}
void
getdb_free(struct getdb *db)
{
free(db);
}
struct direc *
getdir(struct getdb *db, int *err)
{
int reclen;
*err = 0;
while (db->g_dirp == NULL)
{
/*LINTED*/
db->g_num = getdents(db->g_fd,
(struct dirent *)db->g_u.g_dirbuf,
DIBSIZE);
if (db->g_num <= 0) {
if (db->g_num < 0)
*err = errno;
db->g_offs = 0;
return NULL;
}
/*LINTED*/
db->g_dirp = (struct dirent *)db->g_u.g_dirbuf;
while (db->g_dirp &&
#if !defined (__FreeBSD__) && !defined (__NetBSD__) && !defined (__OpenBSD__) \
&& !defined (__DragonFly__) && !defined (__APPLE__)
db->g_dirp->d_ino == 0
#else /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
(db->g_dirp->d_fileno == 0
#ifdef DT_WHT
|| db->g_dirp->d_type == DT_WHT
#endif
)
#endif /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
)
{
next:
#ifndef __DragonFly__
reclen = db->g_dirp->d_reclen;
#else
reclen = _DIRENT_DIRSIZ(db->g_dirp);
#endif
if ((db->g_num -= reclen) == 0 || reclen == 0)
db->g_dirp = NULL;
else
db->g_dirp =
/*LINTED*/
(struct dirent *)((char *)db->g_dirp
+ reclen);
}
}
#if !defined (__FreeBSD__) && !defined (__NetBSD__) && !defined (__OpenBSD__) \
&& !defined (__DragonFly__) && !defined (__APPLE__)
if (db->g_dirp->d_ino == 0)
goto next;
db->g_dic.d_ino = db->g_dirp->d_ino;
#else /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
if (db->g_dirp->d_fileno == 0
#ifdef DT_WHT
|| db->g_dirp->d_type == DT_WHT
#endif
)
{
goto next;
}
db->g_dic.d_ino = db->g_dirp->d_fileno;
#endif /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
db->g_dic.d_name = db->g_dirp->d_name;
#ifndef __DragonFly__
reclen = db->g_dirp->d_reclen;
#else
reclen = _DIRENT_DIRSIZ(db->g_dirp);
#endif
if ((db->g_num -= reclen) == 0 || reclen == 0)
db->g_dirp = NULL;
else
/*LINTED*/
db->g_dirp = (struct dirent *)((char *)db->g_dirp + reclen);
return &(db->g_dic);
}
|
