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# $FreeBSD: stable/11/bin/dd/tests/dd2_test.sh 321139 2017-07-18 17:35:29Z ngie $


atf_test_case max_seek
proc max_seek_head
{
	atf_set "descr" "dd(1) can seek by the maximum amount"
}
proc max_seek_body
{
	match $[df -T . | tail -n 1 | cut -wf 2] {
		with "ufs"
			atf_skip "UFS's maximum file size is too small"
		with "zfs"  # ZFS is fine
		with "tmpfs"
			atf_skip "tmpfs can't create arbitrarily large spare files"
		with * atf_skip "Unknown file system"
	}

	touch f.in
	setglobal 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
proc seek_overflow_head
{
	atf_set "descr" "dd(1) should reject too-large seek values"
}
proc seek_overflow_body
{
	touch f.in
	setglobal 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
}

proc atf_init_test_cases
{
	atf_add_test_case max_seek
	atf_add_test_case seek_overflow
}