Category: DOS kernel
INT 21 - European MS-DOS 4.0 - "CWAIT" - WAIT FOR CHILD TO TERMINATE AH = 8Ah BL = range (00h command subtree, 01h any child) BH = suspend flag 00h suspend if children exist but none are dead 01h return if no dead children CX = Process ID of head of command subtree Return: CF clear if successful AH = termination type (see #01792) AL = return code from child or aborting signal BX = PID of child (0000h if no dead children) CF set on error AX = error code (no child,interrupted system call) Desc: get return code from an asynchronously-executed child program, optionally waiting if no return code is available SeeAlso: AH=4Bh,AH=4Dh,AH=80h,AH=8Dh