/* main: main program of simple shell. */
int main(int argc, char** argv)
{
progname = argv[0];
init_search_path();
while (fetch_line("% ") != EOF)
parse_line();
return 0;
}
char
*carmen_file_find(const char *filename)
{
char *path, buf[256];
int i;
FILE *f;
if (sp_num <= 0)
init_search_path();
for (i = 0; i < sp_num; i++) {
sprintf(buf, "%s/%s", search_path[i], filename);
f = fopen(buf, "r");
if (f != NULL) {
path = (char *) calloc(strlen(buf) + 1, sizeof(char));
carmen_test_alloc(path);
strcpy(path, buf);
fclose(f);
return path;
}
}
return NULL;
}
TranslationUtil::TranslationUtil(QLocale::Language lang, QString translation_file)
: locale(lang)
{
if (search_path.size() == 0)
init_search_path();
QString locale_name = locale.name();
QString translation_name = "qt_" + locale_name;
if (!qt_translator.load(translation_name, QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
load(qt_translator, translation_name);
QString file_locale = localeNameForFile(translation_file);
if (!file_locale.isEmpty() && QLocale(file_locale).language() == lang)
{
load(app_translator, translation_file);
}
else
{
translation_name = base_name + locale_name;
load(app_translator, translation_name);
}
}
/* --------------------------------
* init_postgres
* Initialize POSTGRES.
*
* The database can be specified by name, using the in_dbname parameter, or by
* OID, using the dboid parameter. In the latter case, the actual database
* name can be returned to the caller in out_dbname. If out_dbname isn't
* NULL, it must point to a buffer of size NAMEDATALEN.
*
* In bootstrap mode no parameters are used. The autovacuum launcher process
* doesn't use any parameters either, because it only goes far enough to be
* able to read pg_database; it doesn't connect to any particular database.
* In walsender mode only username is used.
*
* As of PostgreSQL 8.2, we expect init_process() was already called, so we
* already have a struct proc struct ... but it's not completely filled in yet.
*
* Note:
* Be very careful with the order of calls in the init_postgres function.
* --------------------------------
*/
void init_postgres(const char *in_dbname, oid_t dboid, const char *username, char *out_dbname)
{
bool bootstrap = BOOTSTRAP_MODE();
bool am_superuser;
char *fullpath;
char dbname[NAMEDATALEN];
elog(DEBUG3, "init_postgres");
/*
* Add my struct proc struct to the ProcArray.
*
* Once I have done this, I am visible to other backends!
*/
init_proc_phase2();
/*
* Initialize my entry in the shared-invalidation manager's array of
* per-backend data.
*
* Sets up current_bid, a unique backend identifier.
*/
current_bid = INVALID_BKNID;
sci_bkn_init(false);
if (current_bid > MAX_NR_BACKENDS || current_bid <= 0)
elog(FATAL, "bad backend ID: %d", current_bid);
/* Now that we have a bid_t, we can participate in ProcSignal */
signal_init(current_bid);
/*
* bufmgr needs another initialization call too
*/
init_buffer_pool_bkn();
/*
* Initialize local process's access to XLOG.
*/
if (child) {
/*
* The postmaster already started the XLOG machinery, but we need to
* call init_xlog_access(), if the system isn't in hot-standby mode.
* This is handled by calling recovery_in_progres and ignoring the
* result.
*/
(void) recovery_in_progres();
} else {
/*
* We are either a bootstrap process or a standalone backend. Either
* way, start up the XLOG machinery, and register to have it closed
* down at exit.
*/
startup_xlog();
on_shmem_exit(shutdown_xlog, 0);
}
/*
* Initialize the relation cache and the system catalog caches. Note that
* no catalog access happens here; we only set up the hashtable structure.
* We must do this before starting a transaction because transaction abort
* would try to touch these hashtables.
*/
relcache_init_phase1();
init_catcache_phase1();
init_plan_cache();
/* Initialize portal manager */
start_portal();
/* Initialize stats collection --- must happen before first xact */
if (!bootstrap)
stat_init();
/*
* Load relcache entries for the shared system catalogs. This must
* create at least entries for pg_database and catalogs used for
* authentication.
*/
relcache_init_phase2();
/*
* Set up process-exit callback to do pre-shutdown cleanup. This has to
* be after we've initialized all the low-level modules like the buffer
* manager, because during shutdown this has to run before the low-level
* modules start to close down. On the other hand, we want it in place
* before we begin our first transaction --- if we fail during the
* initialization transaction, as is entirely possible, we need the
* AbortTransaction call to clean up.
*/
on_shmem_exit(ShutdownPostgres, 0);
/* The autovacuum launcher is done here */
if (is_avl_proc())
return;
/*
* Start a new transaction here before first access to db, and get a
* snapshot. We don't have a use for the snapshot itself, but we're
* interested in the secondary effect that it sets recent_global_xmin. (This
* is critical for anything that reads heap pages, because HOT may decide
* to prune them even if the process doesn't attempt to modify any
* tuples.)
*/
if (!bootstrap) {
/* statement_timestamp must be set for timeouts to work correctly */
set_current_stmt_start();
start_xact_cmd();
(void) get_xact_snap();
}
/*
* Perform client authentication if necessary, then figure out our
* postgres user ID, and see if we are a superuser.
*
* In standalone mode and in autovacuum worker processes, we use a fixed
* ID, otherwise we figure it out from the authenticated user name.
*/
if (bootstrap || is_avw_proc()) {
init_session_uidStandalone();
am_superuser = true;
} else if (!child) {
init_session_uidStandalone();
am_superuser = true;
if (!ThereIsAtLeastOneRole())
ereport(WARNING, (
errcode(E_UNDEFINED_OBJECT),
errmsg("no roles are defined in this database system"),
errhint("You should immediately run CREATE USER \"%s\" SUPERUSER;.",
username)));
} else {
/* normal multiuser case */
ASSERT(proc_port != NULL);
PerformAuthentication(proc_port);
init_session_uid(username);
am_superuser = superuser();
}
/*
* If we're trying to shut down, only superusers can connect, and new
* replication connections are not allowed.
*/
if ((!am_superuser || am_walsender) &&
proc_port != NULL &&
proc_port->canAcceptConnections == CAC_WAITBACKUP)
{
if (am_walsender)
ereport(FATAL, (
errcode(E_INSUFFICIENT_PRIVILEGE),
errmsg("new replication connections are not allowed during database shutdown")));
else
ereport(FATAL, (
errcode(E_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to connect during database shutdown")));
}
/*
* Binary upgrades only allowed super-user connections
*/
if (is_binary_upgrade && !am_superuser) {
ereport(FATAL, (
errcode(E_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to connect in binary upgrade mode")));
}
/*
* The last few connections slots are reserved for superusers. Although
* replication connections currently require superuser privileges, we
* don't allow them to consume the reserved slots, which are intended for
* interactive use.
*/
if ((!am_superuser || am_walsender) &&
reserved_bknds > 0 &&
!have_nfree_procs(reserved_bknds))
ereport(FATAL, (
errcode(E_TOO_MANY_CONNECTIONS),
errmsg("remaining connection slots are reserved for non-replication superuser connections")));
/*
* If walsender, we don't want to connect to any particular database. Just
* finish the backend startup by processing any options from the startup
* packet, and we're done.
*/
if (am_walsender) {
ASSERT(!bootstrap);
/* must have authenticated as a replication role */
if (!is_authenticated_user_replication_role())
ereport(FATAL, (
errcode(E_INSUFFICIENT_PRIVILEGE),
errmsg("must be replication role to start walsender")));
/* process any options passed in the startup packet */
if (proc_port != NULL)
process_startup_options(proc_port, am_superuser);
/* Apply post_auth_delay as soon as we've read all options */
if (post_auth_delay > 0)
pg_usleep(post_auth_delay * 1000000L);
/* initialize client encoding */
init_client_encoding();
/* report this backend in the struct backend_status array */
stat_backend_start();
/* close the transaction we started above */
commit_xact_cmd();
return;
}
/*
* Set up the global variables holding database id and default tablespace.
* But note we won't actually try to touch the database just yet.
*
* We take a shortcut in the bootstrap case, otherwise we have to look up
* the db's entry in pg_database.
*/
if (bootstrap) {
current_db_id = TemplateDbOid;
current_tbs_id = DEFAULT_TBS_OID;
} else if (in_dbname != NULL) {
struct heap_tuple *tuple;
Form_pg_database dbform;
tuple = GetDatabaseTuple(in_dbname);
if (!HT_VALID(tuple))
ereport(FATAL, (
errcode(E_UNDEFINED_DATABASE),
errmsg("database \"%s\" does not exist", in_dbname)));
dbform = (Form_pg_database) GET_STRUCT(tuple);
current_db_id = HEAPTUP_OID(tuple);
current_tbs_id = dbform->dattablespace;
/* take database name from the caller, just for paranoia */
strlcpy(dbname, in_dbname, sizeof(dbname));
} else {
/* caller specified database by OID */
struct heap_tuple *tuple;
Form_pg_database dbform;
tuple = GetDatabaseTupleByOid(dboid);
if (!HT_VALID(tuple)) {
ereport(FATAL, (
errcode(E_UNDEFINED_DATABASE),
errmsg("database %u does not exist", dboid)));
}
dbform = (Form_pg_database) GET_STRUCT(tuple);
current_db_id = HEAPTUP_OID(tuple);
current_tbs_id = dbform->dattablespace;
ASSERT(current_db_id == dboid);
strlcpy(dbname, NAME_TO_STR(dbform->datname), sizeof(dbname));
/* pass the database name back to the caller */
if (out_dbname)
strcpy(out_dbname, dbname);
}
/* Now we can mark our struct proc entry with the database ID */
/* (We assume this is an atomic store so no lock is needed) */
current_proc->databaseId = current_db_id;
/*
* Now, take a writer's lock on the database we are trying to connect to.
* If there is a concurrently running DROP DATABASE on that database, this
* will block us until it finishes (and has committed its update of
* pg_database).
*
* Note that the lock is not held long, only until the end of this startup
* transaction. This is OK since we are already advertising our use of
* the database in the struct proc array; anyone trying a DROP DATABASE after
* this point will see us there.
*
* Note: use of ROW_EXCL_LOCK here is reasonable because we envision
* our session as being a concurrent writer of the database. If we had a
* way of declaring a session as being guaranteed-read-only, we could use
* ACCESS_SHR_LOCK for such sessions and thereby not conflict against
* CREATE DATABASE.
*/
if (!bootstrap)
lock_sobj(DatabaseRelationId, current_db_id, 0, ROW_EXCL_LOCK);
/*
* Recheck pg_database to make sure the target database hasn't gone away.
* If there was a concurrent DROP DATABASE, this ensures we will die
* cleanly without creating a mess.
*/
if (!bootstrap) {
struct heap_tuple *tuple;
tuple = GetDatabaseTuple(dbname);
if (!HT_VALID(tuple) ||
current_db_id != HEAPTUP_OID(tuple) ||
current_tbs_id != ((Form_pg_database) GET_STRUCT(tuple))->dattablespace)
ereport(FATAL, (
errcode(E_UNDEFINED_DATABASE),
errmsg("database \"%s\" does not exist", dbname),
errdetail("It seems to have just been dropped or renamed.")));
}
/*
* Now we should be able to access the database directory safely. Verify
* it's there and looks reasonable.
*/
fullpath = get_db_path(current_db_id, current_tbs_id);
if (!bootstrap) {
if (access(fullpath, F_OK) == -1) {
if (errno == ENOENT) {
ereport(FATAL, (
errcode(E_UNDEFINED_DATABASE),
errmsg("database \"%s\" does not exist", dbname),
errdetail("The database subdirectory \"%s\" is missing.",
fullpath)));
} else {
ereport(FATAL, (
errcode_file_access(),
errmsg("could not access directory \"%s\": %m", fullpath)));
}
}
check_version(fullpath);
}
set_db_path(fullpath);
/*
* It's now possible to do real access to the system catalogs.
*
* Load relcache entries for the system catalogs. This must create at
* least the minimum set of "nailed-in" cache entries.
*/
relcache_init_phase3();
/* set up ACL framework (so CheckMyDatabase can check permissions) */
initialize_acl();
/*
* Re-read the pg_database row for our database, check permissions and set
* up database-specific GUC settings. We can't do this until all the
* database-access infrastructure is up. (Also, it wants to know if the
* user is a superuser, so the above stuff has to happen first.)
*/
if (!bootstrap)
CheckMyDatabase(dbname, am_superuser);
/*
* Now process any command-line switches and any additional GUC variable
* settings passed in the startup packet. We couldn't do this before
* because we didn't know if client is a superuser.
*/
if (proc_port != NULL)
process_startup_options(proc_port, am_superuser);
/* Process pg_db_role_setting options */
process_settings(current_db_id, get_session_uid());
/* Apply post_auth_delay as soon as we've read all options */
if (post_auth_delay > 0)
pg_usleep(post_auth_delay * 1000000L);
/*
* Initialize various default states that can't be set up until we've
* selected the active user and gotten the right GUC settings.
*/
/* set default namespace search path */
init_search_path();
/* initialize client encoding */
init_client_encoding();
/* report this backend in the struct backend_status array */
if (!bootstrap)
stat_backend_start();
/* close the transaction we started above */
if (!bootstrap)
commit_xact_cmd();
}