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https://github.com/ovh/debian-cis.git
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131 lines
3.3 KiB
Bash
131 lines
3.3 KiB
Bash
# CIS Debian 7 Hardening Utility functions
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#
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# Mounting point manipulation
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#
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# Verify $1 is a partition declared in fstab
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is_a_partition() {
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local PARTITION_NAME=$1
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FNRET=128
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if $(grep "[[:space:]]$1[[:space:]]" /etc/fstab | grep -vqE "^#"); then
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debug "$PARTITION found in fstab"
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FNRET=0
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else
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debug "Unable to find $PARTITION in fstab"
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FNRET=1
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fi
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}
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# Verify that $1 is mounted at runtime
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is_mounted() {
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local PARTITION_NAME=$1
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if $(grep -q "[[:space:]]$1[[:space:]]" /proc/mounts); then
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debug "$PARTITION found in /proc/mounts, it's mounted"
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FNRET=0
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else
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debug "Unable to find $PARTITION in /proc/mounts"
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FNRET=1
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fi
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}
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# Verify $1 has the proper option $2 in fstab
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has_mount_option() {
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local PARTITION=$1
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local OPTION=$2
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if $(grep "[[:space:]]$1[[:space:]]" /etc/fstab | grep -vE "^#" | awk {'print $4'} | grep -q "$2"); then
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debug "$OPTION has been detected in fstab for partition $PARTITION"
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FNRET=0
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else
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debug "Unable to find $OPTION in fstab for partition $PARTITION"
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FNRET=1
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fi
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}
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# Verify $1 has the proper option $2 at runtime
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has_mounted_option() {
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local PARTITION=$1
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local OPTION=$2
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if $(grep "[[:space:]]$1[[:space:]]" /proc/mounts | awk {'print $4'} | grep -q "$2"); then
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debug "$OPTION has been detected in /proc/mounts for partition $PARTITION"
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FNRET=0
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else
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debug "Unable to find $OPTION in /proc/mounts for partition $PARTITION"
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FNRET=1
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fi
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}
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# Setup mount option in fstab
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add_option_to_fstab() {
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local PARTITION=$1
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local OPTION=$2
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debug "Setting $OPTION for $PARTITION in fstab"
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backup_file "/etc/fstab"
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# For example :
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# /dev/sda9 /home ext4 auto,acl,errors=remount-ro 0 2
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# /dev/sda9 /home ext4 auto,acl,errors=remount-ro,nodev 0 2
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debug "Sed command : sed -ie \"s;\(.*\)\(\s*\)\s\($PARTITION\)\s\(\s*\)\(\w*\)\(\s*\)\(\w*\)*;\1\2 \3 \4\5\6\7,$OPTION;\" /etc/fstab"
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sed -ie "s;\(.*\)\(\s*\)\s\($PARTITION\)\s\(\s*\)\(\w*\)\(\s*\)\(\w*\)*;\1\2 \3 \4\5\6\7,$OPTION;" /etc/fstab
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}
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remount_partition() {
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local PARTITION=$1
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debug "Remounting $PARTITION"
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mount -o remount $PARTITION
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}
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#
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# Helper functions to work with apt
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#
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apt_update_if_needed()
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{
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if [ -e /var/cache/apt/pkgcache.bin ]
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then
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UPDATE_AGE=$(( $(date +%s) - $(stat -c '%Y' /var/cache/apt/pkgcache.bin) ))
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if [ $UPDATE_AGE -gt 21600 ]
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then
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# update too old, refresh database
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apt-get update -y >/dev/null 2>/dev/null
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fi
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else
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apt-get update -y >/dev/null 2>/dev/null
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fi
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}
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apt_check_updates()
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{
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local NAME="$1"
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local DETAILS="/dev/shm/${NAME}"
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apt-get upgrade -s 2>/dev/null | grep -E "^Inst" > $DETAILS || :
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local COUNT=$(wc -l < "$DETAILS")
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FNRET=128 # Unknown function return result
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RESULT="" # Result output for upgrade
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if [ $COUNT -gt 0 ]; then
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RESULT="There is $COUNT updates available :\n$(cat $DETAILS)"
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FNRET=1
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else
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RESULT="OK, no updates available"
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FNRET=0
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fi
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rm $DETAILS
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}
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#
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# Returns if a package is installed
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#
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is_installed()
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{
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PKG_NAME=$1
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if `dpkg -s $PKG_NAME 2> /dev/null | grep -q '^Status: install '` ; then
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FNRET=0
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fi
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FNRET=1
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}
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