151 lines
3.4 KiB
C
151 lines
3.4 KiB
C
/* cache.c - Alpine Package Keeper (APK)
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*
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* Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
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* Copyright (C) 2008 Timo Teräs <timo.teras@iki.fi>
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation. See http://www.gnu.org/ for details.
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*/
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#include <dirent.h>
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#include <unistd.h>
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#include "apk_defines.h"
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#include "apk_applet.h"
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#include "apk_database.h"
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#define CACHE_CLEAN BIT(0)
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#define CACHE_DOWNLOAD BIT(1)
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static int cache_download(struct apk_database *db)
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{
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struct apk_package *pkg;
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char pkgfile[256];
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int i, r;
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list_for_each_entry(pkg, &db->installed.packages, installed_pkgs_list) {
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snprintf(pkgfile, sizeof(pkgfile), "%s-%s.apk",
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pkg->name->name, pkg->version);
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if (apk_cache_exists(db, pkg->csum, pkgfile))
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continue;
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for (i = 0; i < db->num_repos; i++) {
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if (!(pkg->repos & BIT(i)))
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continue;
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r = apk_cache_download(db, pkg->csum, db->repos[i].url,
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pkgfile);
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if (r != 0)
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return r;
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}
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}
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return 0;
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}
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static int cache_clean(struct apk_database *db)
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{
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DIR *dir;
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struct dirent *de;
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char path[256];
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int delete, i;
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csum_t csum;
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snprintf(path, sizeof(path), "%s/%s", db->root, db->cache_dir);
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if (chdir(path) != 0)
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return -1;
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dir = opendir(path);
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if (dir == NULL)
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return -1;
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while ((de = readdir(dir)) != NULL) {
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if (de->d_name[0] == '.')
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continue;
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delete = TRUE;
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do {
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if (strlen(de->d_name) <= sizeof(csum_t)*2+2)
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break;
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if (apk_hexdump_parse(APK_BLOB_BUF(csum),
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APK_BLOB_PTR_LEN(de->d_name,
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sizeof(csum_t) * 2)) != 0)
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break;
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if (de->d_name[sizeof(csum_t)*2] != '.')
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break;
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if (strcmp(&de->d_name[sizeof(csum_t)*2+1],
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apk_index_gz) == 0) {
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/* Index - check for matching repository */
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for (i = 0; i < db->num_repos; i++)
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if (memcmp(db->repos[i].url_csum,
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csum, sizeof(csum_t)) == 0)
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break;
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delete = (i >= db->num_repos);
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} else {
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/* Package - search for it */
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delete = (apk_db_get_pkg(db, csum) == NULL);
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}
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} while (0);
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if (delete) {
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if (apk_verbosity >= 2)
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apk_message("Deleting %s", de->d_name);
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if (!(apk_flags & APK_SIMULATE))
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unlink(de->d_name);
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}
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}
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closedir(dir);
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return 0;
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}
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static int cache_main(void *ctx, int argc, char **argv)
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{
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struct apk_database db;
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int actions = 0;
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int r;
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if (argc != 1)
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return -100;
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if (strcmp(argv[0], "sync") == 0)
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actions = CACHE_CLEAN | CACHE_DOWNLOAD;
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else if (strcmp(argv[0], "clean") == 0)
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actions = CACHE_CLEAN;
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else if (strcmp(argv[0], "download") == 0)
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actions = CACHE_DOWNLOAD;
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else
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return -100;
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r = apk_db_open(&db, apk_root,
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(actions & CACHE_DOWNLOAD) ? 0 : APK_OPENF_NO_STATE);
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if (r != 0)
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return r;
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if (!apk_db_cache_active(&db)) {
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apk_error("Package cache is not enabled.\n");
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r = 2;
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goto err;
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}
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if (r == 0 && (actions & CACHE_CLEAN))
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r = cache_clean(&db);
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if (r == 0 && (actions & CACHE_DOWNLOAD))
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r = cache_download(&db);
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err:
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apk_db_close(&db);
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return r;
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}
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static struct apk_applet apk_cache = {
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.name = "cache",
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.help = "Download missing PACKAGEs to cache directory, or delete "
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"files no longer required. Package caching is enabled by "
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"making /etc/apk/cache a symlink to the directory (on boot "
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"media) that will be used as package cache.",
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.arguments = "sync | clean | download",
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.main = cache_main,
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};
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APK_DEFINE_APPLET(apk_cache);
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