wait Command
  
  
  Purpose
  
  Waits until the termination of a process ID.
  
   Syntax
  
  wait [ ProcessID ... ]
  
  Description
  
  The wait command waits (pauses execution) until the process ID
  specified by the ProcessID variable terminates.  If the ProcessID
  variable is not specified, the wait command waits until all pro-
  cess  IDs  known  to  the invoking shell have terminated and exit
  with a 0 exit status.  If a ProcessID variable represents an unk-
  nown process ID, the wait command treats them as known process
  IDs that exited with exit status 127.  The wait command exits
  with the  exit  status  of  the  last process ID specified by the
  ProcessID variable.
  
  Flags
  
  ProcessID	Specifies an unsigned decimal integer process ID of a
  command, which the wait command waits on until termination.
  
  Exit Status
  
  If one or more operands were specified, all of the operands ter-
  minated  or were not known by the invoking shell, and the  status
  of the  last  operand specified is known, then the exit status of
  the wait command is the same as the exit status information of
  the command indicated by the last operand specified.  If the pro-
  cess  terminated abnormally due to the receipt of a signal,  then
  the exit status is greater than 128 and distinct  from  the  exit
  status information generated by other signals, although the exact
  status value is unspecified (see the  kill -l command option).
  Otherwise, the wait command exits with one of the following
  values:
  
  0	The wait command was invoked with no operands and all process
  IDs known by the invoking shell have terminated.
  
  1-126	The wait command detected an error.
  
  127	The command identified by the last ProcessID operand speci-
  fied is unknown.
  
  Implementation Specifics
  
  This command is part of Base Operating System (BOS) Runtime.
  
  Files
  
  /usr/bin/wait	The file that contains the wait command.
  
  Related Information
  
   Shells Overview in AIX Version 3.2 System User's Guide: Base and
  Devices.
  
  The  shutdown command,  sleep command,  wall command.
  
  The  alarm subroutine,  pause subroutine,  sigaction subroutine.