[-vP012] [-u USER[:GRP]] [-U USER[:GRP]] [-e DIR]
	[-/ DIR] [-n NICE] [-m BYTES] [-d BYTES] [-o N]
	[-p N] [-f BYTES] [-c BYTES] PROG ARGS

Change the process state, run PROG

	-u USER[:GRP]	Set uid and gid
	-U USER[:GRP]	Set $UID and $GID in environment
	-e DIR		Set environment variables as specified by files
			in DIR: file=1st_line_of_file
	-/ DIR		Chroot to DIR
	-n NICE		Add NICE to nice value
	-m BYTES	Same as -d BYTES -s BYTES -l BYTES
	-d BYTES	Limit data segment
	-o N		Limit number of open files per process
	-p N		Limit number of processes per uid
	-f BYTES	Limit output file sizes
	-c BYTES	Limit core file size
	-v		Verbose
	-P		Create new process group
	-0		Close stdin
	-1		Close stdout
	-2		Close stderr
