![]() ![]() If you want to see all of the background processes running on the system, you can use ps -e, or ps -eF to get some additional details. The ps Command List all current running processes in the machine. Helper function to check if a struct dirent from /proc is a PID directory. The jobs command will show any background jobs started within the current shell, usually by starting a background task with the & operator or Z bg (e.g. Here's a simple working example (some more error checking and adjustments might be needed): #include After checking, you can then open /proc//stat to get the information you want (in particular, you want the 12th field majflt). Then you can check for directories having a filename that is a number. It shows the process ID, the terminal corresponding to the process, the cumulated CPU time in the DD-hh:mm:ss format, and the executable name. If you want a list of PIDs of currently running processes, you can use opendir() and readdir() to open /proc and iterate over the list of files/directories in there. The ps command chooses every process with a similar effective user ID as the current user and corresponding to a similar terminal as an invoker by default. ![]() n - Show numerical addresses instead of resolving hosts. The options used in this command have the following meaning: -t - Show TCP ports. The way you are supposed to get this information in Linux is through the /proc virtual filesystem. In output that you recieved there are info about all processes that are being. To list all TCP or UDP ports that are being listened on, including the services using the ports and the socket status use the following command: sudo netstat -tunlp. There is no syscall that exposes a list of PIDs unfortunately. ![]()
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