# $NetBSD: t_sizes.sh,v 1.7 2024/04/28 07:27:41 rillig Exp $
#
# Copyright (c) 2005, 2006, 2007, 2008 The NetBSD Foundation, Inc.
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#
# Verifies that the file system controls memory usage correctly.
#

atf_test_case small
small_head() {
       atf_set "descr" "Checks the status after creating a small file"
       atf_set "require.user" "root"
}
small_body() {
       test_mount -o -s10M

       echo a >a || atf_fail "Could not create file"
       eval $($(atf_get_srcdir)/h_tools statvfs .)
       f_bused=$((${f_blocks} - ${f_bfree}))
       [ ${f_bused} -gt 1 ] || atf_fail "Incorrect bused count"
       atf_check -s exit:0 -o empty -e empty rm a

       test_unmount
}

atf_test_case big
big_head() {
       atf_set "descr" "Checks the status after creating a big file"
       atf_set "require.user" "root"
}
big_body() {
       test_mount -o -s10M

       pagesize=$(sysctl -n hw.pagesize)
       eval $($(atf_get_srcdir)/h_tools statvfs . | sed -e 's|^f_|cf_|')
       cf_bused=$((${cf_blocks} - ${cf_bfree}))

       atf_check -s exit:0 -o ignore -e ignore \
           dd if=/dev/zero of=a bs=1m count=5
       eval $($(atf_get_srcdir)/h_tools statvfs .)
       f_bused=$((${f_blocks} - ${f_bfree}))
       [ ${f_bused} -ne ${cf_bused} ] || atf_fail "bused did not change"
       [ ${f_bused} -gt $((5 * 1024 * 1024 / ${pagesize})) ] || \
           atf_fail "bused too big"
       of_bused=${f_bused}
       atf_check -s exit:0 -o empty -e empty rm a
       eval $($(atf_get_srcdir)/h_tools statvfs .)
       f_bused=$((${f_blocks} - ${f_bfree}))
       [ ${f_bused} -lt ${of_bused} ] || \
           atf_fail "bused was not correctly restored"

       test_unmount
}

atf_test_case overflow
overflow_head() {
       atf_set "descr" "Checks the status after creating a big file that" \
                       "overflows the file system limits"
       atf_set "require.user" "root"
}
overflow_body() {
       test_mount -o -s10M

       atf_check -s exit:0 -o empty -e empty touch a
       atf_check -s exit:0 -o empty -e empty rm a
       eval $($(atf_get_srcdir)/h_tools statvfs .)
       of_bused=$((${f_blocks} - ${f_bfree}))
       atf_check -s exit:1 -o ignore -e ignore \
           dd if=/dev/zero of=a bs=1m count=15
       atf_check -s exit:0 -o empty -e empty rm a
       eval $($(atf_get_srcdir)/h_tools statvfs .)
       f_bused=$((${f_blocks} - ${f_bfree}))
       [ ${f_bused} -ge ${of_bused} -a ${f_bused} -le $((${of_bused} + 1)) ] \
           || atf_fail "Incorrect bused"

       test_unmount
}

atf_test_case overwrite
overwrite_head() {
       atf_set "descr" "Checks that writing to the middle of a file" \
                       "does not change its size"
       atf_set "require.user" "root"
}
overwrite_body() {
       test_mount -o -s10M

       atf_check -s exit:0 -o ignore -e ignore \
           dd if=/dev/zero of=a bs=1024 count=10
       sync
       atf_check -s exit:0 -o ignore -e ignore \
           dd if=/dev/zero of=a bs=1024 conv=notrunc seek=1 count=1
       sync
       eval $(stat -s a)
       [ ${st_size} -eq 10240 ] || atf_fail "Incorrect file size"

       test_unmount
}

atf_init_test_cases() {
       . $(atf_get_srcdir)/../h_funcs.subr
       . $(atf_get_srcdir)/h_funcs.subr

       atf_add_test_case small
       atf_add_test_case big
       atf_add_test_case overflow
       atf_add_test_case overwrite
}