summaryrefslogtreecommitdiff
path: root/src/cache.c
blob: 5311815fdea13f62cfb36016183a1182dfdc3fe9 (plain) (blame)
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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
/* cache.c - Alpine Package Keeper (APK)
 *
 * Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
 * Copyright (C) 2008 Timo Teräs <timo.teras@iki.fi>
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation. See http://www.gnu.org/ for details.
 */

#include <errno.h>
#include <stdio.h>
#include <dirent.h>
#include <unistd.h>

#include "apk_defines.h"
#include "apk_applet.h"
#include "apk_database.h"
#include "apk_state.h"
#include "apk_package.h"
#include "apk_print.h"

#define CACHE_CLEAN	BIT(0)
#define CACHE_DOWNLOAD	BIT(1)

static int cache_download(struct apk_database *db)
{
	struct apk_state *state;
	struct apk_change *change;
	struct apk_package *pkg;
	struct apk_repository *repo;
	char item[PATH_MAX], cacheitem[PATH_MAX];
	int i, r = 0;

	state = apk_state_new(db);
	if (state == NULL)
		goto err;

	for (i = 0; i < db->world->num; i++) {
		r = apk_state_lock_dependency(state, &db->world->item[i]);
		if (r != 0) {
			apk_error("Unable to select version for '%s': %d",
				  db->world->item[i].name->name, r);
			goto err;
		}
	}

	list_for_each_entry(change, &state->change_list_head, change_list) {
		pkg = change->newpkg;

		apk_pkg_format_cache(pkg, APK_BLOB_BUF(cacheitem));
		if (faccessat(db->cache_fd, cacheitem, R_OK, 0) == 0)
			continue;

		repo = apk_db_select_repo(db, pkg);
		if (repo == NULL || apk_url_local_file(repo->url) != NULL)
			continue;

		apk_pkg_format_plain(pkg, APK_BLOB_BUF(item));
		apk_cache_download(db, repo->url, item, cacheitem,
				   APK_SIGN_VERIFY_IDENTITY);
	}

err:
	if (state != NULL)
		apk_state_unref(state);
	return r;
}

static int cache_clean(struct apk_database *db)
{
	char tmp[PATH_MAX];
	DIR *dir;
	struct dirent *de;
	int delete, i;
	apk_blob_t b, bname, bver;
	struct apk_name *name;

	dir = fdopendir(dup(db->cache_fd));
	if (dir == NULL)
		return -1;

	while ((de = readdir(dir)) != NULL) {
		if (de->d_name[0] == '.')
			continue;

		delete = TRUE;
		do {
			b = APK_BLOB_STR(de->d_name);

			if (apk_blob_compare(b, APK_BLOB_STR("installed")) == 0) {
				delete = FALSE;
				break;
			}

			if (apk_pkg_parse_name(b, &bname, &bver) < 0) {
				/* Index - check for matching repository */
				for (i = 0; i < db->num_repos; i++) {
					apk_cache_format_index(APK_BLOB_BUF(tmp), &db->repos[i], 0);
					if (apk_blob_compare(b, APK_BLOB_STR(tmp)) != 0) {
						apk_cache_format_index(APK_BLOB_BUF(tmp), &db->repos[i], 1);
						if (apk_blob_compare(b, APK_BLOB_STR(tmp)) != 0)
							continue;
					}
					delete = 0;
					break;
				}
			} else {
				/* Package - search for it */
				name = apk_db_get_name(db, bname);
				if (name == NULL)
					break;
				for (i = 0; i < name->pkgs->num; i++) {
					struct apk_package *pkg = name->pkgs->item[i];

					apk_pkg_format_cache(pkg, APK_BLOB_BUF(tmp));
					if (apk_blob_compare(b, APK_BLOB_STR(tmp)) != 0)
						continue;

					delete = 0;
					break;
				}
			}
		} while (0);

		if (delete) {
			if (apk_verbosity >= 2)
				apk_message("deleting %s", de->d_name);
			if (!(apk_flags & APK_SIMULATE))
				unlinkat(db->cache_fd, de->d_name, 0);
		}
	}

	closedir(dir);
	return 0;
}

static int cache_main(void *ctx, struct apk_database *db, int argc, char **argv)
{
	int r = 0, actions = 0;

	if (argc != 1)
		return -EINVAL;

	if (strcmp(argv[0], "sync") == 0)
		actions = CACHE_CLEAN | CACHE_DOWNLOAD;
	else if (strcmp(argv[0], "clean") == 0)
		actions = CACHE_CLEAN;
	else if (strcmp(argv[0], "download") == 0)
		actions = CACHE_DOWNLOAD;
	else
		return -EINVAL;

	if (!apk_db_cache_active(db)) {
		apk_error("Package cache is not enabled.\n");
		r = 2;
		goto err;
	}

	if (r == 0 && (actions & CACHE_CLEAN))
		r = cache_clean(db);
	if (r == 0 && (actions & CACHE_DOWNLOAD))
		r = cache_download(db);

err:
	return r;
}

static struct apk_applet apk_cache = {
	.name = "cache",
	.help = "Download missing PACKAGEs to cache directory, or delete "
		"files no longer required. Package caching is enabled by "
		"making /etc/apk/cache a symlink to the directory (on boot "
		"media) that will be used as package cache.",
	.arguments = "sync | clean | download",
	.open_flags = APK_OPENF_READ|APK_OPENF_NO_SCRIPTS|APK_OPENF_NO_INSTALLED,
	.main = cache_main,
};

APK_DEFINE_APPLET(apk_cache);