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Top Forums Shell Programming and Scripting Proper Use of WAIT Command Within .ksh Post 303024835 by Corona688 on Wednesday 17th of October 2018 04:56:59 PM
Old 10-17-2018
An example of how you'd use wait:

Code:
sleep 5 &
echo "Sleep is running in background"
wait
echo "Sleep has quit"

The ampersand causes sleep to run in the background, allowing the shell to continue and print the next statement. Then wait prevents the shell from continuing until sleep has finished.
 

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wait(1) 						      General Commands Manual							   wait(1)

NAME
wait - await process completion SYNOPSIS
[pid] DESCRIPTION
If no argument is specified, waits until all processes (started with of the current shell have completed, and reports on abnormal termina- tions. If a numeric argument pid is given and is the process ID of a background process, waits until that process has completed. Other- wise, if pid is not a background process, exits without waiting for any processes to complete. Because the system call must be executed in the parent process, the shell itself executes without creating a new process (see wait(2)). Command-Line Arguments supports the following command line arguments: The unsigned decimal integer process ID of a command, whose termination is to wait for. WARNINGS
Some processes in a 2-or-more-stage pipeline may not be children of the shell, and thus cannot be waited for. SEE ALSO
csh(1), ksh(1), sh-posix(1), sh(1), wait(2). STANDARDS CONFORMANCE
wait(1)
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