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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 <dirent.h>
#include <unistd.h>
#include <stdio.h>
#include "apk_defines.h"
#include "apk_applet.h"
#include "apk_database.h"
#include "apk_state.h"
#include "apk_package.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;
char pkgfile[256];
int i, r;
if (db->world == NULL)
return 0;
state = apk_state_new(db);
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'",
db->world->item[i].name->name);
goto err;
}
}
list_for_each_entry(change, &state->change_list_head, change_list) {
pkg = change->newpkg;
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;
}
}
err:
apk_state_unref(state);
return r;
}
static int cache_clean(struct apk_database *db)
{
DIR *dir;
struct dirent *de;
char path[256], csum[APK_CACHE_CSUM_BYTES];
int delete, i;
apk_blob_t b, bname, bver;
struct apk_name *name;
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 {
b = APK_BLOB_STR(de->d_name);
apk_blob_pull_hexdump(&b, APK_BLOB_BUF(csum));
apk_blob_pull_char(&b, '.');
if (apk_blob_compare(b, APK_BLOB_STR(apk_index_gz)) == 0) {
/* Index - check for matching repository */
for (i = 0; i < db->num_repos; i++) {
if (memcmp(db->repos[i].csum.data,
csum, APK_CACHE_CSUM_BYTES) != 0)
continue;
delete = 0;
break;
}
} else if (b.len > 4 &&
memcmp(b.ptr+b.len-4, ".apk", 4) == 0) {
/* Package - search for it */
if (apk_pkg_parse_name(b, &bname, &bver) < 0)
break;
name = apk_db_get_name(db, bname);
if (name == NULL || name->pkgs == NULL)
break;
for (i = 0; i < name->pkgs->num; i++) {
struct apk_package *pkg = name->pkgs->item[i];
if (memcmp(pkg->csum.data, csum, APK_CACHE_CSUM_BYTES) != 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))
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,
APK_OPENF_NO_SCRIPTS | APK_OPENF_NO_INSTALLED);
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);
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