conf/79713: sysctl(1) in /usr/libexec/save-entropy is not in PATH

[Dirk-Willem van Gulik]

On Mon, 11 Apr 2005, Doug Barton wrote:

> Um, sysctl is not used in /usr/libexec/save-entropy.
> Can you send me the version of the script that you have?

Hmm - you are right - I did not notice that - so it is in someting which
gets called from this script, or while cron is setting up its environmnet,
or when cron sends the output or something.

In any case - attached below -- with PATH changed.

	# $FreeBSD: src/libexec/save-entropy/save-entropy.sh,v 1.2 2001/01/14 07:18:31 dougb Exp $

I'll take an action to sh -x/ktrace to see where the sysctl is coming
form.

Dw.

#!/bin/sh
#
# Copyright (c) 2001  The FreeBSD Project
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD: src/libexec/save-entropy/save-entropy.sh,v 1.2 2001/01/14
07:18:31 d
ougb Exp $

# This script is called by cron to store bits of randomness which are
# then used to seed /dev/random on boot.

# Originally developed by Doug Barton, DougB at FreeBSD.org

PATH=/bin:/usr/bin:/sbin

# If there is a global system configuration file, suck it in.
#
if [ -r /etc/defaults/rc.conf ]; then
        . /etc/defaults/rc.conf
        source_rc_confs
elif [ -r /etc/rc.conf ]; then
        . /etc/rc.conf
fi

case ${entropy_dir} in
[Nn][Oo])
        exit 0
        ;;
*)
        entropy_dir=${entropy_dir:-/var/db/entropy}
        ;;
esac

entropy_save_sz=${entropy_save_sz:-2048}
entropy_save_num=${entropy_save_num:-8}

if [ ! -d "${entropy_dir}" ]; then
        umask 077
        mkdir "${entropy_dir}" || {
            logger -is -t "$0" The entropy directory "${entropy_dir}" does
not \
exist, and cannot be created.  Therefore no entropy can be saved. ;
            exit 1;}
        /usr/sbin/chown operator:operator "${entropy_dir}"
        chmod 0700 "${entropy_dir}"
fi

umask 377

for file_num in `jot ${entropy_save_num} ${entropy_save_num} 1`; do
        if [ -e "${entropy_dir}/saved-entropy.${file_num}" ]; then
                if [ -f "${entropy_dir}/saved-entropy.${file_num}" ]; then
                        new_num=$(($file_num + 1))
                        if [ "${new_num}" -gt "${entropy_save_num}" ];
then
                                rm -f
"${entropy_dir}/saved-entropy.${file_num}"
                        else
                                mv
"${entropy_dir}/saved-entropy.${file_num}" \

"${entropy_dir}/saved-entropy.${new_num}"
                        fi
                else
                        logger -is -t "$0" \
"${entropy_dir}/saved-entropy.${file_num} is not a regular file, and
therefore \
it will not be rotated. Entropy file harvesting is aborted."
                        exit 1
                fi
        fi
done

dd if=/dev/random of="${entropy_dir}/saved-entropy.1" \
    bs=2048 count=1 2> /dev/null

exit 0