RosettaCodeData/Task/Execute-a-system-command/Icon/execute-a-system-command-2....

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  pid := system(command_string,&input,&output,&errout,"wait")
  pid := system(command_string,&input,&output,&errout,"nowait")
	`pid := system(command_string,&input,&output,&errout,"wait")`
	`pid := system(command_string,&input,&output,&errout,"nowait")`