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
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* fstree_from_dir.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "fstree.h"
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifdef _WIN32
int fstree_from_dir(fstree_t *fs, const char *path, unsigned int flags)
{
(void)fs; (void)path; (void)flags;
fputs("Packing a directory is not supported on Windows.\n", stderr);
return -1;
}
#else
static int populate_dir(int dir_fd, fstree_t *fs, tree_node_t *root,
dev_t devstart, unsigned int flags)
{
char *extra = NULL;
struct dirent *ent;
struct stat sb;
tree_node_t *n;
int childfd;
DIR *dir;
dir = fdopendir(dir_fd);
if (dir == NULL) {
perror("fdopendir");
close(dir_fd);
return -1;
}
/* XXX: fdopendir can dup and close dir_fd internally
and still be compliant with the spec. */
dir_fd = dirfd(dir);
for (;;) {
errno = 0;
ent = readdir(dir);
if (ent == NULL) {
if (errno) {
perror("readdir");
goto fail;
}
break;
}
if (!strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "."))
continue;
if (fstatat(dir_fd, ent->d_name, &sb, AT_SYMLINK_NOFOLLOW)) {
perror(ent->d_name);
goto fail;
}
if ((flags & DIR_SCAN_ONE_FILESYSTEM) && sb.st_dev != devstart)
continue;
if (S_ISLNK(sb.st_mode)) {
extra = calloc(1, sb.st_size + 1);
if (extra == NULL)
goto fail_rdlink;
if (readlinkat(dir_fd, ent->d_name,
extra, sb.st_size) < 0) {
goto fail_rdlink;
}
extra[sb.st_size] = '\0';
}
if (!(flags & DIR_SCAN_KEEP_TIME))
sb.st_mtime = fs->defaults.st_mtime;
n = fstree_mknode(root, ent->d_name, strlen(ent->d_name),
extra, &sb);
if (n == NULL) {
perror("creating tree node");
goto fail;
}
free(extra);
extra = NULL;
if (S_ISDIR(n->mode)) {
childfd = openat(dir_fd, n->name, O_DIRECTORY |
O_RDONLY | O_CLOEXEC);
if (childfd < 0) {
perror(n->name);
goto fail;
}
if (populate_dir(childfd, fs, n, devstart, flags))
goto fail;
}
}
closedir(dir);
return 0;
fail_rdlink:
perror("readlink");
fail:
closedir(dir);
free(extra);
return -1;
}
int fstree_from_dir(fstree_t *fs, const char *path, unsigned int flags)
{
struct stat sb;
int fd;
fd = open(path, O_DIRECTORY | O_RDONLY | O_CLOEXEC);
if (fd < 0) {
perror(path);
return -1;
}
if (fstat(fd, &sb)) {
perror(path);
close(fd);
return -1;
}
return populate_dir(fd, fs, fs->root, sb.st_dev, flags);
}
#endif
|
