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#!/bin/bash
TS_TOPDIR="${0%/*}/../.."
TS_DESC="drop page caches related to a file"
. "$TS_TOPDIR"/functions.sh
ts_init "$*"
ts_check_test_command "$TS_CMD_FADVISE"
ts_check_test_command "$TS_CMD_FINCORE"
ts_check_test_command "$TS_CMD_FINDMNT"
ts_check_prog "dd"
ts_check_prog "sleep"
ts_cd "$TS_OUTDIR"
FILE="ddtest"
BS=4k
COUNT=8
FILE_FS="$("$TS_CMD_FINDMNT" -nr -o FSTYPE -T "$PWD")"
if [[ "$FILE_FS" = "tmpfs" ]]; then
ts_skip "fincore does not work on tmpfs"
fi
create_file() {
dd if=/dev/zero of="$FILE" bs=$BS count=$COUNT conv=fsync >& /dev/null
}
{
create_file
"$TS_CMD_FINCORE" "$FILE"
echo
create_file
echo "whole file"
"$TS_CMD_FADVISE" "$FILE"
echo status: $?
"$TS_CMD_FINCORE" "$FILE"
echo
create_file
echo "offset: 8192"
"$TS_CMD_FADVISE" -o 8192 "$FILE"
echo status: $?
"$TS_CMD_FINCORE" "$FILE"
echo
create_file
echo "length: 16384"
"$TS_CMD_FADVISE" -l 16384 "$FILE"
echo status: $?
"$TS_CMD_FINCORE" "$FILE"
echo
create_file
echo "offset: 8192, length: 16384 fd: 42"
"$TS_CMD_FADVISE" -o 8192 -l 16384 --fd 42 42<"$FILE"
echo status: $?
"$TS_CMD_FINCORE" "$FILE"
echo
rm "$FILE"
} >> "$TS_OUTPUT" 2>> "$TS_ERRLOG"
ts_finalize
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