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-rw-r--r--lib/libalpm/be_sync.c445
1 files changed, 271 insertions, 174 deletions
diff --git a/lib/libalpm/be_sync.c b/lib/libalpm/be_sync.c
index c440cd6b..2bf37dab 100644
--- a/lib/libalpm/be_sync.c
+++ b/lib/libalpm/be_sync.c
@@ -1,5 +1,5 @@
/*
- * be_sync.c
+ * be_sync.c : backend for sync databases
*
* Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
@@ -21,7 +21,8 @@
#include "config.h"
#include <errno.h>
-#include <limits.h>
+#include <sys/stat.h>
+#include <unistd.h>
/* libarchive */
#include <archive.h>
@@ -38,32 +39,96 @@
#include "deps.h"
#include "dload.h"
+static char *get_sync_dir(pmhandle_t *handle)
+{
+ const char *dbpath = alpm_option_get_dbpath(handle);
+ size_t len = strlen(dbpath) + 6;
+ char *syncpath;
+ struct stat buf;
+
+ MALLOC(syncpath, len, RET_ERR(handle, PM_ERR_MEMORY, NULL));
+ sprintf(syncpath, "%s%s", dbpath, "sync/");
+
+ if(stat(syncpath, &buf) != 0) {
+ _alpm_log(handle, PM_LOG_DEBUG, "database dir '%s' does not exist, creating it\n",
+ syncpath);
+ if(_alpm_makepath(syncpath) != 0) {
+ free(syncpath);
+ RET_ERR(handle, PM_ERR_SYSTEM, NULL);
+ }
+ } else if(!S_ISDIR(buf.st_mode)) {
+ _alpm_log(handle, PM_LOG_WARNING, _("removing invalid file: %s\n"), syncpath);
+ if(unlink(syncpath) != 0 || _alpm_makepath(syncpath) != 0) {
+ free(syncpath);
+ RET_ERR(handle, PM_ERR_SYSTEM, NULL);
+ }
+ }
+
+ return syncpath;
+}
+
+static int sync_db_validate(pmdb_t *db)
+{
+ pgp_verify_t check_sig;
+
+ if(db->status & DB_STATUS_VALID) {
+ return 0;
+ }
+
+ /* this takes into account the default verification level if UNKNOWN
+ * was assigned to this db */
+ check_sig = _alpm_db_get_sigverify_level(db);
+
+ if(check_sig != PM_PGP_VERIFY_NEVER) {
+ int ret;
+ const char *dbpath = _alpm_db_path(db);
+ if(!dbpath) {
+ /* pm_errno set in _alpm_db_path() */
+ return -1;
+ }
+
+ /* we can skip any validation if the database doesn't exist */
+ if(access(dbpath, R_OK) != 0 && errno == ENOENT) {
+ goto valid;
+ return 0;
+ }
+
+ _alpm_log(db->handle, PM_LOG_DEBUG, "checking signature for %s\n",
+ db->treename);
+ ret = _alpm_gpgme_checksig(db->handle, dbpath, NULL);
+ if((check_sig == PM_PGP_VERIFY_ALWAYS && ret != 0) ||
+ (check_sig == PM_PGP_VERIFY_OPTIONAL && ret == 1)) {
+ RET_ERR(db->handle, PM_ERR_SIG_INVALID, -1);
+ }
+ }
+
+valid:
+ db->status |= DB_STATUS_VALID;
+ return 0;
+}
+
/** 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.
+ * This operation requires a database lock, and will return an applicable error
+ * if the lock could not be obtained.
*
* Example:
* @code
* alpm_list_t *syncs = alpm_option_get_syncdbs();
- * if(alpm_trans_init(0, NULL, NULL, NULL) == 0) {
- * for(i = syncs; i; i = alpm_list_next(i)) {
- * pmdb_t *db = alpm_list_getdata(i);
- * result = alpm_db_update(0, db);
- * alpm_trans_release();
+ * for(i = syncs; i; i = alpm_list_next(i)) {
+ * pmdb_t *db = alpm_list_getdata(i);
+ * result = alpm_db_update(0, db);
*
- * if(result < 0) {
- * printf("Unable to update database: %s\n", alpm_strerrorlast());
- * } else if(result == 1) {
- * printf("Database already up to date\n");
- * } else {
- * printf("Database updated\n");
- * }
+ * if(result < 0) {
+ * printf("Unable to update database: %s\n", alpm_strerrorlast());
+ * } else if(result == 1) {
+ * printf("Database already up to date\n");
+ * } else {
+ * printf("Database updated\n");
* }
* }
* @endcode
@@ -79,76 +144,162 @@
*/
int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
{
- char *dbfile, *syncpath;
- const char *dbpath;
- struct stat buf;
- size_t len;
- int ret;
+ char *syncpath;
+ alpm_list_t *i;
+ int ret = -1;
mode_t oldmask;
-
- ALPM_LOG_FUNC;
+ pmhandle_t *handle;
+ pgp_verify_t check_sig;
/* 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);
+ ASSERT(db != NULL, return -1);
+ handle = db->handle;
+ handle->pm_errno = 0;
+ ASSERT(db != handle->db_local, RET_ERR(handle, PM_ERR_WRONG_ARGS, -1));
+ ASSERT(db->servers != NULL, RET_ERR(handle, PM_ERR_SERVER_NONE, -1));
+
+ syncpath = get_sync_dir(handle);
+ if(!syncpath) {
+ return -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/");
-
/* make sure we have a sane umask */
oldmask = umask(0022);
- if(stat(syncpath, &buf) != 0) {
- _alpm_log(PM_LOG_DEBUG, "database dir '%s' does not exist, creating it\n",
- syncpath);
- if(_alpm_makepath(syncpath) != 0) {
- free(dbfile);
- free(syncpath);
- RET_ERR(PM_ERR_SYSTEM, -1);
+ check_sig = _alpm_db_get_sigverify_level(db);
+
+ /* attempt to grab a lock */
+ if(_alpm_handle_lock(handle)) {
+ RET_ERR(handle, PM_ERR_HANDLE_LOCK, -1);
+ }
+
+ for(i = db->servers; i; i = i->next) {
+ const char *server = i->data;
+ char *fileurl;
+ size_t len;
+ int sig_ret = 0;
+
+ /* print server + filename into a buffer (leave space for .sig) */
+ len = strlen(server) + strlen(db->treename) + 9;
+ CALLOC(fileurl, len, sizeof(char), RET_ERR(handle, PM_ERR_MEMORY, -1));
+ snprintf(fileurl, len, "%s/%s.db", server, db->treename);
+
+ ret = _alpm_download(handle, fileurl, syncpath, force, 0, 0);
+
+ if(ret == 0 && (check_sig == PM_PGP_VERIFY_ALWAYS ||
+ check_sig == PM_PGP_VERIFY_OPTIONAL)) {
+ /* an existing sig file is no good at this point */
+ char *sigpath = _alpm_db_sig_path(db);
+ if(!sigpath) {
+ ret = -1;
+ break;
+ }
+ unlink(sigpath);
+ free(sigpath);
+
+ int errors_ok = (check_sig == PM_PGP_VERIFY_OPTIONAL);
+ /* if we downloaded a DB, we want the .sig from the same server */
+ snprintf(fileurl, len, "%s/%s.db.sig", server, db->treename);
+
+ sig_ret = _alpm_download(handle, fileurl, syncpath, 1, 0, errors_ok);
+ /* errors_ok suppresses error messages, but not the return code */
+ sig_ret = errors_ok ? 0 : sig_ret;
}
- } else if(!S_ISDIR(buf.st_mode)) {
- _alpm_log(PM_LOG_WARNING, _("removing invalid file: %s\n"), syncpath);
- if(unlink(syncpath) != 0 || _alpm_makepath(syncpath) != 0) {
- free(dbfile);
- free(syncpath);
- RET_ERR(PM_ERR_SYSTEM, -1);
+
+ FREE(fileurl);
+ if(ret != -1 && sig_ret != -1) {
+ break;
}
}
- ret = _alpm_download_single_file(dbfile, db->servers, syncpath, force);
- free(dbfile);
- free(syncpath);
- umask(oldmask);
-
if(ret == 1) {
/* files match, do nothing */
- pm_errno = 0;
- return(1);
+ handle->pm_errno = 0;
+ goto cleanup;
} 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);
+ _alpm_log(handle, PM_LOG_DEBUG, "failed to sync db: %s\n",
+ alpm_strerror(handle->pm_errno));
+ goto cleanup;
}
/* Cache needs to be rebuilt */
_alpm_db_free_pkgcache(db);
- return(0);
+ db->status &= ~DB_STATUS_VALID;
+ if(sync_db_validate(db)) {
+ /* pm_errno should be set */
+ ret = -1;
+ }
+
+cleanup:
+
+ if(_alpm_handle_unlock(handle)) {
+ _alpm_log(handle, PM_LOG_WARNING, _("could not remove lock file %s\n"),
+ alpm_option_get_lockfile(handle));
+ }
+ free(syncpath);
+ umask(oldmask);
+ return ret;
}
/* Forward decl so I don't reorganize the whole file right now */
static int sync_db_read(pmdb_t *db, struct archive *archive,
- struct archive_entry *entry, pmpkg_t *likely_pkg);
+ struct archive_entry *entry, pmpkg_t **likely_pkg);
+
+static pmpkg_t *load_pkg_for_entry(pmdb_t *db, const char *entryname,
+ const char **entry_filename, pmpkg_t *likely_pkg)
+{
+ char *pkgname = NULL, *pkgver = NULL;
+ unsigned long pkgname_hash;
+ pmpkg_t *pkg;
+
+ /* get package and db file names */
+ if(entry_filename) {
+ char *fname = strrchr(entryname, '/');
+ if(fname) {
+ *entry_filename = fname + 1;
+ } else {
+ *entry_filename = NULL;
+ }
+ }
+ if(_alpm_splitname(entryname, &pkgname, &pkgver, &pkgname_hash) != 0) {
+ _alpm_log(db->handle, PM_LOG_ERROR,
+ _("invalid name for database entry '%s'\n"), entryname);
+ return NULL;
+ }
+
+ if(likely_pkg && strcmp(likely_pkg->name, pkgname) == 0) {
+ pkg = likely_pkg;
+ } else {
+ pkg = _alpm_pkghash_find(db->pkgcache, pkgname);
+ }
+ if(pkg == NULL) {
+ pkg = _alpm_pkg_new();
+ if(pkg == NULL) {
+ RET_ERR(db->handle, PM_ERR_MEMORY, NULL);
+ }
+
+ pkg->name = pkgname;
+ pkg->version = pkgver;
+ pkg->name_hash = pkgname_hash;
+
+ pkg->origin = PKG_FROM_SYNCDB;
+ pkg->origin_data.db = db;
+ pkg->ops = &default_pkg_ops;
+ pkg->handle = db->handle;
+
+ /* add to the collection */
+ _alpm_log(db->handle, PM_LOG_FUNCTION, "adding '%s' to package cache for db '%s'\n",
+ pkg->name, db->treename);
+ db->pkgcache = _alpm_pkghash_add(db->pkgcache, pkg);
+ } else {
+ free(pkgname);
+ free(pkgver);
+ }
+
+ return pkg;
+}
/*
* This is the data table used to generate the estimating function below.
@@ -206,7 +357,7 @@ static size_t estimate_package_count(struct stat *st, struct archive *archive)
/* assume it is at least somewhat compressed */
per_package = 200;
}
- return((size_t)(st->st_size / per_package) + 1);
+ return (size_t)((st->st_size / per_package) + 1);
}
static int sync_db_populate(pmdb_t *db)
@@ -219,12 +370,8 @@ static int sync_db_populate(pmdb_t *db)
struct archive_entry *entry;
pmpkg_t *pkg = NULL;
- 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);
+ RET_ERR(db->handle, PM_ERR_LIBARCHIVE, -1);
}
archive_read_support_compression_all(archive);
@@ -236,24 +383,24 @@ static int sync_db_populate(pmdb_t *db)
return -1;
}
- _alpm_log(PM_LOG_DEBUG, "opening database archive %s\n", dbpath);
+ _alpm_log(db->handle, PM_LOG_DEBUG, "opening database archive %s\n", dbpath);
if(archive_read_open_filename(archive, dbpath,
ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
- _alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), dbpath,
+ _alpm_log(db->handle, PM_LOG_ERROR, _("could not open file %s: %s\n"), dbpath,
archive_error_string(archive));
archive_read_finish(archive);
- RET_ERR(PM_ERR_DB_OPEN, -1);
+ RET_ERR(db->handle, PM_ERR_DB_OPEN, -1);
}
if(stat(dbpath, &buf) != 0) {
- RET_ERR(PM_ERR_DB_OPEN, -1);
+ RET_ERR(db->handle, PM_ERR_DB_OPEN, -1);
}
est_count = estimate_package_count(&buf, archive);
/* initialize hash at 66% full */
db->pkgcache = _alpm_pkghash_create(est_count * 3 / 2);
if(db->pkgcache == NULL) {
- RET_ERR(PM_ERR_MEMORY, -1);
+ RET_ERR(db->handle, PM_ERR_MEMORY, -1);
}
while(archive_read_next_header(archive, &entry) == ARCHIVE_OK) {
@@ -262,51 +409,28 @@ static int sync_db_populate(pmdb_t *db)
st = archive_entry_stat(entry);
if(S_ISDIR(st->st_mode)) {
- const char *name;
-
- pkg = _alpm_pkg_new();
- if(pkg == NULL) {
- archive_read_finish(archive);
- RET_ERR(PM_ERR_MEMORY, -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_pkghash_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_pkghash_add(db->pkgcache, pkg);
- count++;
+ continue;
} else {
/* we have desc, depends or deltas - parse it */
- sync_db_read(db, archive, entry, pkg);
+ if(sync_db_read(db, archive, entry, &pkg) != 0) {
+ _alpm_log(db->handle, PM_LOG_ERROR,
+ _("could not parse package description file '%s' from db '%s'\n"),
+ archive_entry_pathname(entry), db->treename);
+ continue;
+ }
}
}
+ count = alpm_list_count(db->pkgcache->list);
+
if(count > 0) {
db->pkgcache->list = alpm_list_msort(db->pkgcache->list, (size_t)count, _alpm_pkg_cmp);
}
archive_read_finish(archive);
+ _alpm_log(db->handle, PM_LOG_DEBUG, "added %d packages to package cache for db '%s'\n",
+ count, db->treename);
- return(count);
+ return count;
}
#define READ_NEXT(s) do { \
@@ -328,73 +452,51 @@ static int sync_db_populate(pmdb_t *db)
} while(1) /* note the while(1) and not (0) */
static int sync_db_read(pmdb_t *db, struct archive *archive,
- struct archive_entry *entry, pmpkg_t *likely_pkg)
+ struct archive_entry *entry, pmpkg_t **likely_pkg)
{
- const char *entryname = NULL, *filename;
- char *pkgname, *p, *q;
+ const char *entryname, *filename;
pmpkg_t *pkg;
struct archive_read_buffer buf;
- ALPM_LOG_FUNC;
-
- if(db == NULL) {
- RET_ERR(PM_ERR_DB_NULL, -1);
- }
-
- if(entry != NULL) {
- entryname = archive_entry_pathname(entry);
- }
+ 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(db->handle, 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",
+ _alpm_log(db->handle, PM_LOG_FUNCTION, "loading package data from archive entry %s\n",
entryname);
memset(&buf, 0, sizeof(buf));
/* 512K for a line length seems reasonable */
buf.max_line_size = 512 * 1024;
- /* 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--);
- filename = q + 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 */
- if(likely_pkg && strcmp(likely_pkg->name, pkgname) == 0) {
- pkg = likely_pkg;
- } else {
- if(db->pkgcache == NULL) {
- RET_ERR(PM_ERR_MEMORY, -1);
- }
- pkg = _alpm_pkghash_find(db->pkgcache, pkgname);
- }
+ pkg = load_pkg_for_entry(db, entryname, &filename, *likely_pkg);
+
if(pkg == NULL) {
- _alpm_log(PM_LOG_DEBUG, "package %s not found in %s sync database",
- pkgname, db->treename);
- return(-1);
+ _alpm_log(db->handle, PM_LOG_DEBUG,
+ "entry %s could not be loaded into %s sync database",
+ entryname, db->treename);
+ return -1;
}
if(strcmp(filename, "desc") == 0 || strcmp(filename, "depends") == 0
|| strcmp(filename, "deltas") == 0) {
- while(_alpm_archive_fgets(archive, &buf) == ARCHIVE_OK) {
+ int ret;
+ while((ret = _alpm_archive_fgets(archive, &buf)) == ARCHIVE_OK) {
char *line = _alpm_strtrim(buf.line);
if(strcmp(line, "%NAME%") == 0) {
READ_NEXT(line);
if(strcmp(line, pkg->name) != 0) {
- _alpm_log(PM_LOG_ERROR, _("%s database is inconsistent: name "
+ _alpm_log(db->handle, PM_LOG_ERROR, _("%s database is inconsistent: name "
"mismatch on package %s\n"), db->treename, pkg->name);
}
} else if(strcmp(line, "%VERSION%") == 0) {
READ_NEXT(line);
if(strcmp(line, pkg->version) != 0) {
- _alpm_log(PM_LOG_ERROR, _("%s database is inconsistent: version "
+ _alpm_log(db->handle, PM_LOG_ERROR, _("%s database is inconsistent: version "
"mismatch on package %s\n"), db->treename, pkg->name);
}
} else if(strcmp(line, "%FILENAME%") == 0) {
@@ -434,8 +536,7 @@ static int sync_db_read(pmdb_t *db, struct archive *archive,
/* we don't do anything with this value right now */
READ_NEXT(line);
} else if(strcmp(line, "%PGPSIG%") == 0) {
- /* we don't do anything with this value right now */
- READ_NEXT(line);
+ READ_AND_STORE(pkg->base64_sig);
} else if(strcmp(line, "%REPLACES%") == 0) {
READ_AND_STORE_ALL(pkg->replaces);
} else if(strcmp(line, "%DEPENDS%") == 0) {
@@ -460,55 +561,51 @@ static int sync_db_read(pmdb_t *db, struct archive *archive,
}
}
}
+ if(ret != ARCHIVE_EOF) {
+ goto error;
+ }
+ *likely_pkg = pkg;
} else if(strcmp(filename, "files") == 0) {
/* currently do nothing with this file */
} else {
/* unknown database file */
- _alpm_log(PM_LOG_DEBUG, "unknown database file: %s\n", filename);
+ _alpm_log(db->handle, PM_LOG_DEBUG, "unknown database file: %s\n", filename);
}
-error:
- FREE(pkgname);
- /* TODO: return 0 always? */
- return(0);
-}
+ return 0;
-static int sync_db_version(pmdb_t *db)
-{
- return(2);
+error:
+ _alpm_log(db->handle, PM_LOG_DEBUG, "error parsing database file: %s\n", filename);
+ return -1;
}
struct db_operations sync_db_ops = {
.populate = sync_db_populate,
.unregister = _alpm_db_unregister,
- .version = sync_db_version,
};
-pmdb_t *_alpm_db_register_sync(const char *treename)
+pmdb_t *_alpm_db_register_sync(pmhandle_t *handle, const char *treename,
+ pgp_verify_t level)
{
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);
+ _alpm_log(handle, PM_LOG_DEBUG, "registering sync database '%s'\n", treename);
db = _alpm_db_new(treename, 0);
if(db == NULL) {
- RET_ERR(PM_ERR_DB_CREATE, NULL);
+ RET_ERR(handle, PM_ERR_DB_CREATE, NULL);
}
db->ops = &sync_db_ops;
+ db->handle = handle;
+ db->pgp_verify = level;
+
+ if(sync_db_validate(db)) {
+ _alpm_db_free(db);
+ return NULL;
+ }
handle->dbs_sync = alpm_list_add(handle->dbs_sync, db);
- return(db);
+ return db;
}