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/* cache.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.
*
* 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 <limits.h>
#include "apk_defines.h"
#include "apk_applet.h"
#include "apk_database.h"
#include "apk_package.h"
#include "apk_print.h"
#include "apk_solver.h"
#define CACHE_CLEAN BIT(0)
#define CACHE_DOWNLOAD BIT(1)
static int cache_download(struct apk_database *db)
{
struct apk_changeset changeset = {};
struct apk_change *change;
struct apk_package *pkg;
struct apk_repository *repo;
char item[PATH_MAX], cacheitem[PATH_MAX];
int i, r, ret = 0;
r = apk_solver_solve(db, 0, db->world, NULL, &changeset);
if (r < 0) {
apk_error("Unable to select packages. Run apk fix.");
return r;
}
for (i = 0; i < changeset.changes->num; i++) {
change = &changeset.changes->item[i];
pkg = change->newpkg;
if (pkg->repos & db->local_repos)
continue;
repo = apk_db_select_repo(db, pkg);
if (repo == NULL)
continue;
apk_pkg_format_cache(pkg, APK_BLOB_BUF(cacheitem));
apk_pkg_format_plain(pkg, APK_BLOB_BUF(item));
r = apk_cache_download(db, repo->url, pkg->arch,
item, cacheitem,
APK_SIGN_VERIFY_IDENTITY);
if (r) {
apk_error("%s: %s", item, apk_error_str(r));
ret++;
}
}
return ret;
}
static void cache_clean_item(struct apk_database *db, int dirfd, const char *name, struct apk_package *pkg)
{
char tmp[PATH_MAX];
apk_blob_t b;
int i;
if (pkg != NULL || strcmp(name, "installed") == 0)
return;
b = APK_BLOB_STR(name);
for (i = 0; i < db->num_repos; i++) {
/* Check if this is a valid index */
apk_cache_format_index(APK_BLOB_BUF(tmp), &db->repos[i]);
if (apk_blob_compare(b, APK_BLOB_STR(tmp)) == 0)
return;
}
if (apk_verbosity >= 2)
apk_message("deleting %s", name);
if (!(apk_flags & APK_SIMULATE))
unlinkat(dirfd, name, 0);
}
static int cache_clean(struct apk_database *db)
{
return apk_db_cache_foreach_item(db, cache_clean_item);
}
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|APK_OPENF_CACHE_WRITE,
.main = cache_main,
};
APK_DEFINE_APPLET(apk_cache);
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