Function sys_getpgid

components/lwp/lwp_pgrp.c:485–499

* getpgid() returns the PGID of the process specified by pid. * If pid is zero, the process ID of the calling process is used. (Retrieving the PGID of a process other * than the caller is rarely necessary, and the POSIX.1 getpgrp() is preferred for that task.) */

 *      than the caller is rarely necessary, and the POSIX.1 getpgrp() is preferred for that task.)
 */
sysret_t sys_getpgid(pid_t pid)
{
    rt_lwp_t process;

    lwp_pid_lock_take();
    process = lwp_from_pid_locked(pid);
    lwp_pid_lock_release();

    if (process == RT_NULL)
    {
        return -ESRCH;
    }

    return lwp_pgid_get_byprocess(process);
}

#ifdef RT_USING_FINSH