diff options
Diffstat (limited to 'src/cache.c')
| -rw-r--r-- | src/cache.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/cache.c b/src/cache.c new file mode 100644 index 0000000..152008b --- /dev/null +++ b/src/cache.c @@ -0,0 +1,150 @@ +/* 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 <dirent.h> +#include <unistd.h> + +#include "apk_defines.h" +#include "apk_applet.h" +#include "apk_database.h" + +#define CACHE_CLEAN BIT(0) +#define CACHE_DOWNLOAD BIT(1) + +static int cache_download(struct apk_database *db) +{ + struct apk_package *pkg; + char pkgfile[256]; + int i, r; + + list_for_each_entry(pkg, &db->installed.packages, installed_pkgs_list) { + snprintf(pkgfile, sizeof(pkgfile), "%s-%s.apk", + pkg->name->name, pkg->version); + if (apk_cache_exists(db, pkg->csum, pkgfile)) + continue; + for (i = 0; i < db->num_repos; i++) { + if (!(pkg->repos & BIT(i))) + continue; + + r = apk_cache_download(db, pkg->csum, db->repos[i].url, + pkgfile); + if (r != 0) + return r; + } + } + return 0; +} + +static int cache_clean(struct apk_database *db) +{ + DIR *dir; + struct dirent *de; + char path[256]; + int delete, i; + csum_t csum; + + snprintf(path, sizeof(path), "%s/%s", db->root, db->cache_dir); + if (chdir(path) != 0) + return -1; + + dir = opendir(path); + if (dir == NULL) + return -1; + + while ((de = readdir(dir)) != NULL) { + if (de->d_name[0] == '.') + continue; + delete = TRUE; + do { + if (strlen(de->d_name) <= sizeof(csum_t)*2+2) + break; + if (apk_hexdump_parse(APK_BLOB_BUF(csum), + APK_BLOB_PTR_LEN(de->d_name, + sizeof(csum_t) * 2)) != 0) + break; + if (de->d_name[sizeof(csum_t)*2] != '.') + break; + if (strcmp(&de->d_name[sizeof(csum_t)*2+1], + apk_index_gz) == 0) { + /* Index - check for matching repository */ + for (i = 0; i < db->num_repos; i++) + if (memcmp(db->repos[i].url_csum, + csum, sizeof(csum_t)) == 0) + break; + delete = (i >= db->num_repos); + } else { + /* Package - search for it */ + delete = (apk_db_get_pkg(db, csum) == NULL); + } + } while (0); + + if (delete) { + if (apk_verbosity >= 2) + apk_message("Deleting %s", de->d_name); + if (!(apk_flags & APK_SIMULATE)) + unlink(de->d_name); + } + } + + closedir(dir); + return 0; +} + +static int cache_main(void *ctx, int argc, char **argv) +{ + struct apk_database db; + int actions = 0; + int r; + + if (argc != 1) + return -100; + + 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 -100; + + r = apk_db_open(&db, apk_root, + (actions & CACHE_DOWNLOAD) ? 0 : APK_OPENF_EMPTY_STATE); + if (r != 0) + return r; + + 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: + apk_db_close(&db); + 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", + .main = cache_main, +}; + +APK_DEFINE_APPLET(apk_cache); |