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/* 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);
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