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When to get PID of just started process?
Some shells try to do this anytime it is the last command to be run, while others will only do it when there are no other commands before or after the command, and others will not do it at all.
How to get the process ID from getpid ( )?
getppid () : returns the process ID of the parent of the calling process. If the calling process was created by the fork () function and the parent process still exists at the time of the getppid function call, this function returns the process ID of the parent process.
Is there any better solution for that than collecting PIDs?
Is there any better solution for that than collecting PIDs of the subprocesses, wait for them in order and sum exit statuses? wait also (optionally) takes the PID of the process to wait for, and with $! you get the PID of the last command launched in background.
What do getpid and getppid do in unistd.h?
Both getppid() and getpid() are inbuilt functions defined in unistd.h library. getppid() : returns the process ID of the parent of the calling process. If the calling process was created by the fork() function and the parent process still exists at the time of the getppid function call, this function returns the process ID of the parent process.
What does unregister-scheduled-job cmdlet deletes?
The Unregister-ScheduledJob cmdlet deletes the ProcessJob scheduled job and all saved results of its job instances. A scheduled job runs commands or a script. A scheduled job can include job triggers that start the job and job options that set conditions for running the job.
How to get the PID from the command prompt?
Using the WINDOWTITLE filter avoids the pipe so you can put it in a for loop and assign it to a variable with SET if you like: Removing the /v makes it quicker, and the /NH gets rid of the header line.
How to save the PID of the background process?
You need to save the PID of the background process at the time you start it: foo & FOO_PID=$! # do other stuff kill $FOO_PID You cannot use job control, since that is an interactive feature and tied to a controlling terminal.