TA-unix/bin/selinuxChecker.sh
Michael Erdely 07122cafad
Use ip command to determine IP address ('hostname -I' does not work on all Linux systems)
Filter out multiple listing of the same btrfs volume
Use mktemp for temp files (for times when the TA may be run outside of Splunk)
If running rlog.sh outside of Splunk, use $HOME to store seek file
Debian also uses apt
Arch Linux uses pacman
Add use of sudo -n for 'apt update' and 'pacman -Syy'
vmstat uses "K paged out"
Replace the use of 'sar' with netstat and vm_stat for MacOS
2025-01-08 18:21:51 -05:00

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#!/bin/sh
# SPDX-FileCopyrightText: 2024 Splunk, Inc.
# SPDX-License-Identifier: Apache-2.0
# shellcheck disable=SC1091
. "$(dirname "$0")"/common.sh
TMP_ERROR_FILTER_FILE=$(mktemp) # For filtering out awk warning from stderr
PRINTF='END {printf "%s app=selinux %s %s %s %s\n", DATE, FILEHASH, SELINUX, SELINUXTYPE, SETLOCALDEFS}'
if [ "$KERNEL" = "Linux" ] ; then
if [ -f /etc/sysconfig/selinux ] ; then
SELINUX_FILE=/etc/sysconfig/selinux
elif [ -f /etc/selinux/config ] ; then
# shellcheck disable=SC2034
SELINUX_FILE=/etc/selinux/config
else
echo "SELinux not configured." >> "$TEE_DEST"
exit 1
fi
assertHaveCommand cat
# Get file hash
# shellcheck disable=SC2016
CMD='eval date ; eval LD_LIBRARY_PATH=$SPLUNK_HOME/lib $SPLUNK_HOME/bin/openssl sha256 $SELINUX_FILE ; cat $SELINUX_FILE'
# Get the date.
# shellcheck disable=SC2016
PARSE_0='NR==1 {DATE=$0}'
# Try to use cross-platform case-insensitive matching for text. Note
# that "match", "tolower", IGNORECASE and other common awk commands or
# options are actually nawk/gawk extensions so avoid them if possible.
# shellcheck disable=SC2016
PARSE_1='/^[Ss][Ee][Ll][Ii][Nn][Uu][Xx]\=/ { SELINUX="selinux=" substr($0,index($0,"=")+1,length($0)) } '
# shellcheck disable=SC2016
PARSE_2='/^[Ss][Ee][Ll][Ii][Nn][Uu][Xx][Tt][Yy][Pp][Ee]\=/ { SELINUXTYPE="selinuxtype=" substr($0,index($0,"=")+1,length($0)) } '
# shellcheck disable=SC2016
PARSE_3='/^[Ss][Ee][Tt][Ll][Oo][Cc][Aa][Ll][Dd][Ee][Ff][Ss]\=/ { SETLOCALDEFS="setlocaldefs=" substr($0,index($0,"=")+1,length($0)) } '
# shellcheck disable=SC2016
PARSE_4='/^SHA256/ {FILEHASH="file_hash=" $2}'
MESSAGE="$PARSE_0 $PARSE_1 $PARSE_2 $PARSE_3 $PARSE_4"
# shellcheck disable=SC2086
$CMD | tee "$TEE_DEST" | $AWK "$MESSAGE $PRINTF" 2> $TMP_ERROR_FILTER_FILE
# shellcheck disable=SC2086
grep -v "warning: regexp escape sequence" < $TMP_ERROR_FILTER_FILE 1>&2
# shellcheck disable=SC2086
rm $TMP_ERROR_FILTER_FILE 2>/dev/null
echo "Cmd = [$CMD]; | $AWK '$MESSAGE $PRINTF'" >> "$TEE_DEST"
fi