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# Copyright (c) 2017 Spectra Logic Corporation
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atf_test_case max_seek
max_seek_head()
{
	atf_set "descr" "dd(1) can seek by the maximum amount"
}
max_seek_body()
{
	case `df -T . | tail -n 1 | cut -wf 2` in
		"ufs")
			atf_skip "UFS's maximum file size is too small";;
		"zfs") ;; # ZFS is fine
		"tmpfs")
			atf_skip "tmpfs can't create arbitrarily large spare files";;
		*) atf_skip "Unknown file system";;
	esac

	touch f.in
	seek=`echo "2^63 / 4096 - 1" | bc`
	atf_check -s exit:0 -e ignore dd if=f.in of=f.out bs=4096 seek=$seek
}

atf_test_case seek_overflow
seek_overflow_head()
{
	atf_set "descr" "dd(1) should reject too-large seek values"
}
seek_overflow_body()
{
	touch f.in
	seek=`echo "2^63 / 4096" | bc`
	atf_check -s not-exit:0 -e match:"seek offsets cannot be larger than" \
		dd if=f.in of=f.out bs=4096 seek=$seek
	atf_check -s not-exit:0 -e match:"seek offsets cannot be larger than" \
		dd if=f.in of=f.out bs=4096 seek=-1
}

atf_init_test_cases()
{
	atf_add_test_case max_seek
	atf_add_test_case seek_overflow
}