SUPPORTED ATTRIBUTES
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uid              UID of process
gid              GID of process
euid             effective UID of process
egid             effective GID of process
pid              process ID
ppid             parent process ID
pgrp             process group ID
sess             pointer to session
time             cpu time of process
utime            user time
stime            system time
start            time process started
size             virtual memory size (bytes)
rss              resident set size (bytes)
fname            command name    
state            state of process
ttydev           path of process' tty
ttynum           tty number of process
cmndline         command line of process