wait waits for the termination of one or more jobs or child processes in the background. If you specify job-ids, wait waits for all processes in each job to terminate. If you specify a pid, wait waits for the child process with that process ID to terminate. If no child process has that process ID, wait returns immediately.
If you specify neither a pid nor a job-id, wait waits for the termination of all process IDs known to the invoking shell.
If you specified a job-id which has terminated or is unknown by the invoking shell, an error message and a return code of 127 is returned. If you specified a pid which has terminated or is unknown to the shell, a return code of 127 is returned. If a signal terminated the process abnormally, the exit status is a value greater than 128 unique to that signal; otherwise, possible exit statuses are:
An error occurred.
A specified pid or job-id has terminated or is unknown by the invoking shell.
POSIX.2. x/OPEN Portability Guide 4.0. All UNIX systems. Windows 2000. Windows XP. Windows Server 2003. Windows Vista. Windows 7. Windows Server 2008. Windows 8. Windows Server 2012.
The ability to handle a job ID as well as a process ID is an extension to the XPG standard.
This command is built into the MKS KornShell.
MKS Toolkit for Power Users
MKS Toolkit for System Administrators
MKS Toolkit for Developers
MKS Toolkit for Interoperability
MKS Toolkit for Professional Developers
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MKS Toolkit for Enterprise Developers 64-Bit Edition
MKS Toolkit 9.5 Documentation Build 3.