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
|
/*
Copyright (C) 2015-2019 IoT.bzh
author: José Bollo <jose.bollo@iot.bzh>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#define _GNU_SOURCE
#include <string.h>
#include <dirent.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "utils-dir.h"
static int clean_dirfd(int dirfd)
{
int rc;
DIR *dir;
struct dirent *ent;
dir = fdopendir(dirfd);
if (dir == NULL) {
close(dirfd);
return -1;
}
for (;;) {
rc = -1;
errno = 0;
ent = readdir(dir);
if (ent == NULL) {
if (errno)
goto error;
break;
}
if (ent->d_name[0] == '.' && (ent->d_name[1] == 0
|| (ent->d_name[1] == '.' && ent->d_name[2] == 0)))
continue;
rc = unlinkat(dirfd, ent->d_name, 0);
if (!rc)
continue;
if (errno != EISDIR)
goto error;
rc = openat(dirfd, ent->d_name, O_DIRECTORY|O_RDONLY);
if (rc < 0)
goto error;
rc = clean_dirfd(rc);
if (rc)
goto error;
rc = unlinkat(dirfd, ent->d_name, AT_REMOVEDIR);
if (rc)
goto error;
}
rc = 0;
error:
closedir(dir);
return rc;
}
/* removes recursively the content of a directory */
int remove_directory_content_fd(int dirfd)
{
dirfd = dup(dirfd);
return dirfd < 0 ? dirfd : clean_dirfd(dirfd);
}
/* removes recursively the content of a directory */
int remove_directory_content_at(int dirfd, const char *directory)
{
int fd, rc;
fd = openat(dirfd, directory, O_DIRECTORY|O_RDONLY);
if (fd < 0)
return fd;
rc = remove_directory_content_fd(fd);
return rc;
}
int remove_directory_content(const char *directory)
{
return remove_directory_content_at(AT_FDCWD, directory);
}
/* removes the working directory */
int remove_directory(const char *directory, int force)
{
int rc;
rc = force ? remove_directory_content(directory) : 0;
return rc ? rc : rmdir(directory);
}
int remove_directory_at(int dirfd, const char *directory, int force)
{
int rc;
rc = force ? remove_directory_content_at(dirfd, directory) : 0;
return rc ? rc : unlinkat(dirfd, directory, AT_REMOVEDIR);
}
/* create a directory */
int create_directory_at(int dirfd, const char *directory, mode_t mode, int mkparents)
{
int rc;
size_t len, l;
char *copy;
const char *iter;
rc = mkdirat(dirfd, directory, mode);
if (!rc || errno != ENOENT)
return rc;
/* check parent of dest */
iter = strrchr(directory, '/');
len = iter ? (size_t)(iter - directory) : 0;
if (!len)
return rc;
copy = strndupa(directory, len);
/* backward loop */
l = len;
rc = mkdirat(dirfd, copy, mode);
while(rc) {
if (errno != ENOENT)
return rc;
while (l && copy[l] != '/')
l--;
if (l == 0)
return rc;
copy[l] = 0;
rc = mkdirat(dirfd, copy, mode);
}
/* forward loop */
while(l < len) {
copy[l] = '/';
while (copy[++l]);
rc = mkdirat(dirfd, copy, mode);
if (rc)
return rc;
}
/* finalize */
return mkdirat(dirfd, directory, mode);
}
int create_directory(const char *directory, mode_t mode, int mkparents)
{
return create_directory_at(AT_FDCWD, directory, mode, mkparents);
}
|
