How to Retrieve Detailed Process Information Using `ps -p $PID` in Go?

Retrieving Process Details via PID in Go

In modern computing systems, processes are the fundamental units of execution. To effectively manage processes, it's crucial to retrieve details about them, including memory usage, CPU time, and command line arguments.

If you have a list of process IDs (PIDs) in Go, you may encounter limitations in obtaining process details usingsyscall.Getrusage(). To overcome this challenge, let's delve into an alternative approach using the BASH command ps -p $PID.

The ps -p $PID command provides a comprehensive set of process information by default, including:

• PID (Process ID): Echoes the process identifier
• TTY (Terminal): Name of the controlling terminal (if any)
• TIME (CPU Time): Amount of CPU time used since execution
• CMD (Command): Command that invoked the process

To retrieve additional details, you can use the -o options flag. This flag allows you to specify specific information to be displayed. For instance, ps -p $PID -o pid,vsz=MEMORY -o user,group=GROUP -o comm,args=ARGS provides:

• PID (Process ID): Echoes the process identifier
• MEMORY (Virtual Size): Memory usage of the process
• USER (Username): User under which the process is running
• GROUP (Group): Group under which the process is running
• COMMAND (Full Command with Arguments): Complete invocation command including arguments

By utilizing the ps -p $PID command, you can obtain detailed information about processes in your system, regardless of their PIDs.

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