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
|
/* 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 "util.h"
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
static char *get_file_path(tree_node_t *n, const char *name)
{
char *ptr, *new;
if (n->parent == NULL) {
ptr = strdup(name);
if (ptr == NULL)
goto fail;
return ptr;
}
ptr = fstree_get_path(n);
if (ptr == NULL)
goto fail;
assert(canonicalize_name(ptr) == 0);
new = realloc(ptr, strlen(ptr) + strlen(name) + 2);
if (new == NULL)
goto fail;
ptr = new;
strcat(ptr, "/");
strcat(ptr, name);
return ptr;
fail:
perror("getting absolute file path");
free(ptr);
return NULL;
}
static int populate_dir(fstree_t *fs, tree_node_t *root, bool keep_time_stamps)
{
char *extra = NULL;
struct dirent *ent;
struct stat sb;
tree_node_t *n;
DIR *dir;
dir = opendir(".");
if (dir == NULL) {
perror("opendir");
return -1;
}
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(AT_FDCWD, ent->d_name, &sb, AT_SYMLINK_NOFOLLOW)) {
perror(ent->d_name);
goto fail;
}
if (S_ISLNK(sb.st_mode)) {
extra = calloc(1, sb.st_size + 1);
if (extra == NULL)
goto fail_rdlink;
if (readlink(ent->d_name, extra, sb.st_size) < 0)
goto fail_rdlink;
extra[sb.st_size] = '\0';
} else if (S_ISREG(sb.st_mode)) {
extra = get_file_path(root, ent->d_name);
if (extra == NULL)
goto fail;
}
if (!keep_time_stamps) {
sb.st_atim = fs->defaults.st_atim;
sb.st_mtim = fs->defaults.st_mtim;
sb.st_ctim = fs->defaults.st_ctim;
}
n = fstree_mknode(fs, root, ent->d_name, strlen(ent->d_name),
extra, &sb);
if (n == NULL) {
perror("creating tree node");
goto fail;
}
free(extra);
extra = NULL;
}
closedir(dir);
for (n = root->data.dir->children; n != NULL; n = n->next) {
if (S_ISDIR(n->mode)) {
if (pushd(n->name))
return -1;
if (populate_dir(fs, n, keep_time_stamps))
return -1;
if (popd())
return -1;
}
}
return 0;
fail_rdlink:
perror("readlink");
fail:
closedir(dir);
free(extra);
return -1;
}
int fstree_from_dir(fstree_t *fs, const char *path, bool keep_time_stamps)
{
int ret;
if (pushd(path))
return -1;
ret = populate_dir(fs, fs->root, keep_time_stamps);
if (popd())
ret = -1;
return ret;
}
|
