if (grep m{nfs}, grep m{/home}, map <>, local @ARGV=qw{/etc/mtab}) {
    # ...
} else {
    # ...
}

##</code><code>##

if (local @ARGV=qw(/etc/mtab) and grep /nfs/, grep m{/home}, <>) {
    # ...
} else {
    # ...
}