posix_setpgid Set process group id for job control &reftitle.description; boolposix_setpgid intpid intpgid Let the process pid join the process group pgid. &reftitle.parameters; pid The process id. pgid The process group id. &reftitle.returnvalues; &return.success; &reftitle.seealso; See POSIX.1 and the setsid(2) manual page on the POSIX system for more informations on process groups and job control.