ls -lisa "`which ps`"
 192455   80 -r-xr-xr-x    1 root     root        76936 Nov  3  2004 /bin/ps*

perl -e 'system(q(ls -lisa "`which ps`"))'
 192455   80 -r-xr-xr-x    1 root     root        76936 Nov  3  2004 /bin/ps