Function lwp_name2pid

components/lwp/lwp_pid.c:1106–1138

* @brief Convert process name to process ID * * @param[in] name Process name to look up (without path) * * @return pid_t Process ID if found, or 0 if not found * * @note The function only returns PIDs for processes whose main thread * is not in CLOSED state. */

 *          is not in CLOSED state.
 */
pid_t lwp_name2pid(const char *name)
{
    int idx;
    pid_t pid = 0;
    rt_thread_t main_thread;
    char* process_name = RT_NULL;
    rt_sched_lock_level_t slvl;

    lwp_pid_lock_take();
    for (idx = 0; idx < RT_LWP_MAX_NR; idx++)
    {
        /* 0 is reserved */
        struct rt_lwp *lwp = (struct rt_lwp *)lwp_pid_ary[idx].data;

        if (lwp)
        {
            process_name = strrchr(lwp->exe_file, '/');
            process_name = process_name? process_name + 1: lwp->cmd;
            if (!rt_strncmp(name, process_name, RT_NAME_MAX))
            {
                main_thread = rt_list_entry(lwp->t_grp.prev, struct rt_thread, sibling);
                rt_sched_lock(&slvl);
                if (!(rt_sched_thread_get_stat(main_thread) == RT_THREAD_CLOSE))
                {
                    pid = lwp->pid;
                }
                rt_sched_unlock(slvl);
            }
        }
    }
    lwp_pid_lock_release();
    return pid;
}

/**
 * @brief Get the process ID of the current lightweight process (LWP)