110  3.  ++-   

   .      -
 . " "    , 
   .     
 : fork (), fork-exec (), system ()  posit_spawn (). 
?ork(), fork-exec()  posix_spawn()  ,  
,      system ()   , -
      .  -
     wait (),   "" -
,            -
     .

     .    
 ,          -
  .     -
   ,    
  .       
,    .