ref: 1c424b1b4d5931f2a4b87b6f0f75827bc53ff9d7
dir: /testdir/u.main/
BEGIN {
print "bunch of commandline error messages follow\n"
t = ARGV[0]; print "\n" t "\n"; system(t) # usage
t = ARGV[0] " -f"; print "\n" t "\n"; system(t) # no program file
t = ARGV[0] " -f /glop/glop"; print "\n" t "\n"; system(t) # program inaccessible
t = ARGV[0] " -zzz"; print "\n" t "\n"; system(t) # weird option
t = ARGV[0] " -F"; print "\n" t "\n"; system(t) # null FS
t = ARGV[0] " -F :"; print "\n" t "\n"; system(t) # field sep but no program
}