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pacman/lib/libalpm/be_sync.c

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/*
* be_sync.c
*
* Copyright (c) 2006-2010 Pacman Development Team <pacman-dev@archlinux.org>
* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <errno.h>
#include <ctype.h>
#include <locale.h>
/* libarchive */
#include <archive.h>
#include <archive_entry.h>
/* libalpm */
#include "util.h"
#include "log.h"
#include "alpm.h"
#include "alpm_list.h"
#include "package.h"
#include "handle.h"
#include "delta.h"
#include "deps.h"
#include "dload.h"
/** Update a package database
*
* An update of the package database \a db will be attempted. Unless
* \a force is true, the update will only be performed if the remote
* database was modified since the last update.
*
* A transaction is necessary for this operation, in order to obtain a
* database lock. During this transaction the front-end will be informed
* of the download progress of the database via the download callback.
*
* Example:
* @code
* pmdb_t *db;
* int result;
* db = alpm_list_getdata(alpm_option_get_syncdbs());
* if(alpm_trans_init(0, NULL, NULL, NULL) == 0) {
* result = alpm_db_update(0, db);
* alpm_trans_release();
*
* if(result > 0) {
* printf("Unable to update database: %s\n", alpm_strerrorlast());
* } else if(result < 0) {
* printf("Database already up to date\n");
* } else {
* printf("Database updated\n");
* }
* }
* @endcode
*
* @ingroup alpm_databases
* @note After a successful update, the \link alpm_db_get_pkgcache()
* package cache \endlink will be invalidated
* @param force if true, then forces the update, otherwise update only in case
* the database isn't up to date
* @param db pointer to the package database to update
* @return 0 on success, > 0 on error (pm_errno is set accordingly), < 0 if up
* to date
*/
int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
{
char *dbfile, *syncpath;
const char *dbpath;
size_t len;
int ret;
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
ASSERT(db != NULL && db != handle->db_local, RET_ERR(PM_ERR_WRONG_ARGS, -1));
if(!alpm_list_find_ptr(handle->dbs_sync, db)) {
RET_ERR(PM_ERR_DB_NOT_FOUND, -1);
}
len = strlen(db->treename) + 4;
MALLOC(dbfile, len, RET_ERR(PM_ERR_MEMORY, -1));
sprintf(dbfile, "%s.db", db->treename);
dbpath = alpm_option_get_dbpath();
len = strlen(dbpath) + 6;
MALLOC(syncpath, len, RET_ERR(PM_ERR_MEMORY, -1));
sprintf(syncpath, "%s%s", dbpath, "sync/");
ret = _alpm_download_single_file(dbfile, db->servers, syncpath, force);
free(dbfile);
free(syncpath);
if(ret == 1) {
/* files match, do nothing */
pm_errno = 0;
return(1);
} else if(ret == -1) {
/* pm_errno was set by the download code */
_alpm_log(PM_LOG_DEBUG, "failed to sync db: %s\n", alpm_strerrorlast());
return(-1);
}
/* Cache needs to be rebuilt */
_alpm_db_free_pkgcache(db);
return(0);
}
int _alpm_sync_db_populate(pmdb_t *db)
{
int count = 0;
struct archive *archive;
struct archive_entry *entry;
ALPM_LOG_FUNC;
ASSERT(db != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
if((archive = archive_read_new()) == NULL)
RET_ERR(PM_ERR_LIBARCHIVE, 1);
archive_read_support_compression_all(archive);
archive_read_support_format_all(archive);
if(archive_read_open_filename(archive, _alpm_db_path(db),
ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
_alpm_log(PM_LOG_ERROR, _("could not open %s: %s\n"), _alpm_db_path(db),
archive_error_string(archive));
RET_ERR(PM_ERR_PKG_OPEN, 1);
}
while(archive_read_next_header(archive, &entry) == ARCHIVE_OK) {
const struct stat *st;
const char *name;
pmpkg_t *pkg;
st = archive_entry_stat(entry);
if(S_ISDIR(st->st_mode)) {
pkg = _alpm_pkg_new();
if(pkg == NULL) {
archive_read_finish(archive);
return(-1);
}
name = archive_entry_pathname(entry);
if(_alpm_splitname(name, pkg) != 0) {
_alpm_log(PM_LOG_ERROR, _("invalid name for database entry '%s'\n"),
name);
_alpm_pkg_free(pkg);
continue;
}
/* duplicated database entries are not allowed */
if(_alpm_pkg_find(db->pkgcache, pkg->name)) {
_alpm_log(PM_LOG_ERROR, _("duplicated database entry '%s'\n"), pkg->name);
_alpm_pkg_free(pkg);
continue;
}
pkg->origin = PKG_FROM_SYNCDB;
pkg->ops = &default_pkg_ops;
pkg->origin_data.db = db;
/* add to the collection */
_alpm_log(PM_LOG_FUNCTION, "adding '%s' to package cache for db '%s'\n",
pkg->name, db->treename);
db->pkgcache = alpm_list_add(db->pkgcache, pkg);
count++;
} else {
/* we have desc, depends or deltas - parse it */
_alpm_sync_db_read(db, archive, entry);
}
}
db->pkgcache = alpm_list_msort(db->pkgcache, count, _alpm_pkg_cmp);
archive_read_finish(archive);
return(count);
}
int _alpm_sync_db_read(pmdb_t *db, struct archive *archive, struct archive_entry *entry)
{
char line[1024];
const char *entryname = NULL;
char *filename, *pkgname, *p, *q;
pmpkg_t *pkg;
ALPM_LOG_FUNC;
if(db == NULL) {
RET_ERR(PM_ERR_DB_NULL, -1);
}
if(entry != NULL) {
entryname = archive_entry_pathname(entry);
}
if(entryname == NULL) {
_alpm_log(PM_LOG_DEBUG, "invalid archive entry provided to _alpm_sync_db_read, skipping\n");
return(-1);
}
_alpm_log(PM_LOG_FUNCTION, "loading package data from archive entry %s\n",
entryname);
/* get package and db file names */
STRDUP(pkgname, entryname, RET_ERR(PM_ERR_MEMORY, -1));
p = pkgname + strlen(pkgname);
for(q = --p; *q && *q != '/'; q--);
STRDUP(filename, q+1, RET_ERR(PM_ERR_MEMORY, -1));
for(p = --q; *p && *p != '-'; p--);
for(q = --p; *q && *q != '-'; q--);
*q = '\0';
/* package is already in db due to parsing of directory name */
pkg = _alpm_pkg_find(db->pkgcache, pkgname);
if(pkg == NULL) {
_alpm_log(PM_LOG_DEBUG, "package %s not found in %s sync database",
pkgname, db->treename);
return(-1);
}
if(strcmp(filename, "desc") == 0 || strcmp(filename, "depends") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) != NULL) {
_alpm_strtrim(line);
if(strcmp(line, "%NAME%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
if(strcmp(_alpm_strtrim(line), pkg->name) != 0) {
_alpm_log(PM_LOG_ERROR, _("%s database is inconsistent: name "
"mismatch on package %s\n"), db->treename, pkg->name);
}
} else if(strcmp(line, "%VERSION%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
if(strcmp(_alpm_strtrim(line), pkg->version) != 0) {
_alpm_log(PM_LOG_ERROR, _("%s database is inconsistent: version "
"mismatch on package %s\n"), db->treename, pkg->name);
}
} else if(strcmp(line, "%FILENAME%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
STRDUP(pkg->filename, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%DESC%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
STRDUP(pkg->desc, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%GROUPS%") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) && strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
pkg->groups = alpm_list_add(pkg->groups, linedup);
}
} else if(strcmp(line, "%URL%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
STRDUP(pkg->url, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%LICENSE%") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) &&
strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
pkg->licenses = alpm_list_add(pkg->licenses, linedup);
}
} else if(strcmp(line, "%ARCH%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
STRDUP(pkg->arch, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%BUILDDATE%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
_alpm_strtrim(line);
char first = tolower((unsigned char)line[0]);
if(first > 'a' && first < 'z') {
struct tm tmp_tm = {0}; /* initialize to null in case of failure */
setlocale(LC_TIME, "C");
strptime(line, "%a %b %e %H:%M:%S %Y", &tmp_tm);
pkg->builddate = mktime(&tmp_tm);
setlocale(LC_TIME, "");
} else {
pkg->builddate = atol(line);
}
} else if(strcmp(line, "%PACKAGER%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
STRDUP(pkg->packager, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%CSIZE%") == 0) {
/* NOTE: the CSIZE and SIZE fields both share the "size" field
* in the pkginfo_t struct. This can be done b/c CSIZE
* is currently only used in sync databases, and SIZE is
* only used in local databases.
*/
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
pkg->size = atol(_alpm_strtrim(line));
/* also store this value to isize if isize is unset */
if(pkg->isize == 0) {
pkg->isize = pkg->size;
}
} else if(strcmp(line, "%ISIZE%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
pkg->isize = atol(_alpm_strtrim(line));
} else if(strcmp(line, "%MD5SUM%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
STRDUP(pkg->md5sum, _alpm_strtrim(line), goto error);
} else if(strcmp(line, "%REPLACES%") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) &&
strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
pkg->replaces = alpm_list_add(pkg->replaces, linedup);
}
} else if(strcmp(line, "%EPOCH%") == 0) {
if(_alpm_archive_fgets(line, sizeof(line), archive) == NULL) {
goto error;
}
pkg->epoch = atoi(_alpm_strtrim(line));
} else if(strcmp(line, "%FORCE%") == 0) {
/* For backward compatibility, treat force as a non-zero epoch
* but only if we didn't already have a known epoch value. */
if(!pkg->epoch) {
pkg->epoch = 1;
}
} else if(strcmp(line, "%DEPENDS%") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) &&
strlen(_alpm_strtrim(line))) {
pmdepend_t *dep = _alpm_splitdep(_alpm_strtrim(line));
pkg->depends = alpm_list_add(pkg->depends, dep);
}
} else if(strcmp(line, "%OPTDEPENDS%") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) &&
strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
pkg->optdepends = alpm_list_add(pkg->optdepends, linedup);
}
} else if(strcmp(line, "%CONFLICTS%") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) &&
strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
pkg->conflicts = alpm_list_add(pkg->conflicts, linedup);
}
} else if(strcmp(line, "%PROVIDES%") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) &&
strlen(_alpm_strtrim(line))) {
char *linedup;
STRDUP(linedup, _alpm_strtrim(line), goto error);
pkg->provides = alpm_list_add(pkg->provides, linedup);
}
}
}
} else if(strcmp(filename, "deltas") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) != NULL) {
_alpm_strtrim(line);
if(strcmp(line, "%DELTAS%") == 0) {
while(_alpm_archive_fgets(line, sizeof(line), archive) && strlen(_alpm_strtrim(line))) {
pmdelta_t *delta = _alpm_delta_parse(line);
if(delta) {
pkg->deltas = alpm_list_add(pkg->deltas, delta);
}
}
}
}
} else {
/* unknown database file */
_alpm_log(PM_LOG_DEBUG, "unknown database file: %s", filename);
}
error:
FREE(pkgname);
FREE(filename);
return(0);
}
struct db_operations sync_db_ops = {
.populate = _alpm_sync_db_populate,
.unregister = _alpm_db_unregister,
};
pmdb_t *_alpm_db_register_sync(const char *treename)
{
pmdb_t *db;
alpm_list_t *i;
ALPM_LOG_FUNC;
for(i = handle->dbs_sync; i; i = i->next) {
pmdb_t *sdb = i->data;
if(strcmp(treename, sdb->treename) == 0) {
_alpm_log(PM_LOG_DEBUG, "attempt to re-register the '%s' database, using existing\n", sdb->treename);
return sdb;
}
}
_alpm_log(PM_LOG_DEBUG, "registering sync database '%s'\n", treename);
db = _alpm_db_new(treename, 0);
db->ops = &sync_db_ops;
if(db == NULL) {
RET_ERR(PM_ERR_DB_CREATE, NULL);
}
handle->dbs_sync = alpm_list_add(handle->dbs_sync, db);
return(db);
}
/* vim: set ts=2 sw=2 noet: */
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