src/indexer/indexer-worker.c

/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "restrict-access.h"
#include "mail-storage-service.h"
#include "mail-storage-settings.h"
#include "master-service.h"
#include "master-service-settings.h"
#include "master-connection.h"

static struct master_connection *master_conn;
static struct mail_storage_service_ctx *storage_service;

static void client_connected(struct master_service_connection *conn)
{
    if (master_conn != NULL) {
        i_error("indexer-worker must be configured with client_limit=1");
        return;
    }

    master_service_client_connection_accept(conn);
    master_conn = master_connection_create(conn->fd, storage_service);
}

static void drop_privileges(void)
{
    struct restrict_access_settings set;
    const char *error;

    /* by default we don't drop any privileges, but keep running as root. */
    restrict_access_get_env(&set);
    if (set.uid != 0) {
        /* open config connection before dropping privileges */
        struct master_service_settings_input input;
        struct master_service_settings_output output;

        i_zero(&input);
        input.module = "mail";
        input.service = "indexer-worker";
        (void)master_service_settings_read(master_service,
                           &input, &output, &error);
    }
    restrict_access_by_env(RESTRICT_ACCESS_FLAG_ALLOW_ROOT, NULL);
}

int main(int argc, char *argv[])
{
    enum master_service_flags service_flags =
        MASTER_SERVICE_FLAG_SEND_STATS |
        MASTER_SERVICE_FLAG_KEEP_CONFIG_OPEN;
    enum mail_storage_service_flags storage_service_flags =
        MAIL_STORAGE_SERVICE_FLAG_USERDB_LOOKUP |
        MAIL_STORAGE_SERVICE_FLAG_TEMP_PRIV_DROP |
        MAIL_STORAGE_SERVICE_FLAG_NO_IDLE_TIMEOUT;
    int c;

    master_service = master_service_init("indexer-worker", service_flags,
                         &argc, &argv, "D");
    while ((c = master_getopt(master_service)) > 0) {
        switch (c) {
        case 'D':
            storage_service_flags |=
                MAIL_STORAGE_SERVICE_FLAG_ENABLE_CORE_DUMPS;
            break;
        default:
            return FATAL_DEFAULT;
        }
    }

    drop_privileges();
    master_service_init_log(master_service, "indexer-worker: ");

    storage_service = mail_storage_service_init(master_service, NULL,
                            storage_service_flags);
    restrict_access_allow_coredumps(TRUE);
    master_service_init_finish(master_service);

    master_service_run(master_service, client_connected);

    if (master_conn != NULL)
        master_connection_destroy(&master_conn);
    mail_storage_service_deinit(&storage_service);
    master_service_deinit(&master_service);
        return 0;
}