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
|
/* io_url.c - Alpine Package Keeper (APK)
*
* Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
* Copyright (C) 2008-2011 Timo Teräs <timo.teras@iki.fi>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-only
*/
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <fetch.h>
#include "apk_io.h"
const char *apk_url_local_file(const char *url)
{
if (strncmp(url, "file:", 5) == 0)
return &url[5];
if (strncmp(url, "http:", 5) != 0 &&
strncmp(url, "https:", 6) != 0 &&
strncmp(url, "ftp:", 4) != 0)
return url;
return NULL;
}
struct apk_fetch_istream {
struct apk_istream is;
fetchIO *fetchIO;
struct url_stat urlstat;
};
static int fetch_maperror(int ec)
{
static const signed short map[] = {
[FETCH_ABORT] = -ECONNABORTED,
[FETCH_AUTH] = -EACCES,
[FETCH_DOWN] = -ECONNREFUSED,
[FETCH_EXISTS] = -EEXIST,
[FETCH_FULL] = -ENOSPC,
/* [FETCH_INFO] = , */
[FETCH_MEMORY] = -ENOMEM,
[FETCH_MOVED] = -ENOENT,
[FETCH_NETWORK] = -ENETUNREACH,
/* [FETCH_OK] = , */
[FETCH_PROTO] = -EPROTO,
[FETCH_RESOLV] = -APKE_DNS,
[FETCH_SERVER] = -APKE_REMOTE_IO,
[FETCH_TEMP] = -EAGAIN,
[FETCH_TIMEOUT] = -ETIMEDOUT,
[FETCH_UNAVAIL] = -ENOENT,
[FETCH_UNKNOWN] = -EIO,
[FETCH_URL] = -APKE_URL_FORMAT,
[FETCH_UNCHANGED] = -EALREADY,
};
if (ec < 0 || ec >= ARRAY_SIZE(map) || !map[ec]) return -EIO;
return map[ec];
}
static void fetch_get_meta(struct apk_istream *is, struct apk_file_meta *meta)
{
struct apk_fetch_istream *fis = container_of(is, struct apk_fetch_istream, is);
*meta = (struct apk_file_meta) {
.atime = fis->urlstat.atime,
.mtime = fis->urlstat.mtime,
};
}
static ssize_t fetch_read(struct apk_istream *is, void *ptr, size_t size)
{
struct apk_fetch_istream *fis = container_of(is, struct apk_fetch_istream, is);
ssize_t r;
r = fetchIO_read(fis->fetchIO, ptr, size);
if (r < 0) return -EIO;
return r;
}
static int fetch_close(struct apk_istream *is)
{
int r = is->err;
struct apk_fetch_istream *fis = container_of(is, struct apk_fetch_istream, is);
fetchIO_close(fis->fetchIO);
free(fis);
return r < 0 ? r : 0;
}
static const struct apk_istream_ops fetch_istream_ops = {
.get_meta = fetch_get_meta,
.read = fetch_read,
.close = fetch_close,
};
static struct apk_istream *apk_istream_fetch(const char *url, time_t since)
{
struct apk_fetch_istream *fis = NULL;
struct url *u;
char *flags = "Ci";
fetchIO *io = NULL;
int rc = -EIO;
u = fetchParseURL(url);
if (!u) {
rc = -APKE_URL_FORMAT;
goto err;
}
fis = malloc(sizeof *fis + apk_io_bufsize);
if (!fis) {
rc = -ENOMEM;
goto err;
}
if (since != APK_ISTREAM_FORCE_REFRESH) {
u->last_modified = since;
flags = "i";
}
io = fetchXGet(u, &fis->urlstat, flags);
if (!io) {
rc = fetch_maperror(fetchLastErrCode);
goto err;
}
*fis = (struct apk_fetch_istream) {
.is.ops = &fetch_istream_ops,
.is.buf = (uint8_t*)(fis+1),
.is.buf_size = apk_io_bufsize,
.fetchIO = io,
.urlstat = fis->urlstat,
};
fetchFreeURL(u);
return &fis->is;
err:
if (u) fetchFreeURL(u);
if (io) fetchIO_close(io);
if (fis) free(fis);
return ERR_PTR(rc);
}
struct apk_istream *apk_istream_from_fd_url_if_modified(int atfd, const char *url, time_t since)
{
if (apk_url_local_file(url) != NULL)
return apk_istream_from_file(atfd, apk_url_local_file(url));
return apk_istream_fetch(url, since);
}
|
