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f99f0ee14e
This gives more permissions to services (e.g. network access to services which require this) when they are started as an automatic service jail. The sshd patch is important for the sshd-related functionality as described in the man-page in the service jails part. The location of the added env vars is supposed to allow overriding them in rc.conf, and to hard-disable the use of svcj for some parts where it doesn't make sense or will not work. Only a subset of all of the services are fully tested (I'm running this since more than a year with various services started as service jails). The untested parts should be most of the time ok, in some edge-cases more permissions are needed inside the service jail. Differential Revision: https://reviews.freebsd.org/D40371
158 lines
2.9 KiB
Bash
Executable file
158 lines
2.9 KiB
Bash
Executable file
#!/bin/sh
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#
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#
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# PROVIDE: random
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# REQUIRE: FILESYSTEMS
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# BEFORE: netif
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# KEYWORD: nojail shutdown
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. /etc/rc.subr
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name="random"
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desc="Harvest and save entropy for random device"
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start_cmd="random_start"
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stop_cmd="random_stop"
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extra_commands="saveseed"
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saveseed_cmd="${name}_stop"
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save_dev_random()
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{
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oumask=`umask`
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umask 077
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for f ; do
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debug "saving entropy to $f"
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dd if=/dev/random of="$f" bs=4096 count=1 status=none &&
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( chflags nodump "$f" 2>/dev/null || : ) &&
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chmod 600 "$f" &&
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fsync "$f" "$(dirname "$f")"
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done
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umask ${oumask}
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}
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feed_dev_random()
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{
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for f ; do
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if [ -f "$f" -a -r "$f" -a -s "$f" ] ; then
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if dd if="$f" of=/dev/random bs=4096 2>/dev/null ; then
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debug "entropy read from $f"
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rm -f "$f"
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fi
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fi
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done
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}
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random_start()
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{
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if [ -n "${harvest_mask}" ]; then
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echo -n 'Setting up harvesting: '
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${SYSCTL} kern.random.harvest.mask=${harvest_mask} > /dev/null
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${SYSCTL_N} kern.random.harvest.mask_symbolic
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fi
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echo -n 'Feeding entropy: '
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if [ ! -w /dev/random ] ; then
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warn "/dev/random is not writeable"
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return 1
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fi
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# Reseed /dev/random with previously stored entropy.
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case ${entropy_dir:=/var/db/entropy} in
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[Nn][Oo])
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;;
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*)
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if [ -d "${entropy_dir}" ] ; then
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feed_dev_random "${entropy_dir}"/*
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fi
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;;
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esac
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case ${entropy_file:=/entropy} in
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[Nn][Oo])
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;;
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*)
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feed_dev_random "${entropy_file}" /var/db/entropy-file
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save_dev_random "${entropy_file}"
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;;
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esac
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case ${entropy_boot_file:=/boot/entropy} in
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[Nn][Oo])
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;;
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*)
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save_dev_random "${entropy_boot_file}"
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;;
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esac
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echo '.'
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}
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random_stop()
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{
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# Write some entropy so when the machine reboots /dev/random
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# can be reseeded
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#
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case ${entropy_file:=/entropy} in
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[Nn][Oo])
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;;
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*)
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echo -n 'Writing entropy file: '
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rm -f ${entropy_file} 2> /dev/null
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oumask=`umask`
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umask 077
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if touch ${entropy_file} 2> /dev/null; then
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entropy_file_confirmed="${entropy_file}"
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else
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# Try this as a reasonable alternative for read-only
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# roots, diskless workstations, etc.
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rm -f /var/db/entropy-file 2> /dev/null
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if touch /var/db/entropy-file 2> /dev/null; then
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entropy_file_confirmed=/var/db/entropy-file
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fi
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fi
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case ${entropy_file_confirmed} in
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'')
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warn 'write failed (read-only fs?)'
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;;
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*)
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save_dev_random "${entropy_file_confirmed}"
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echo '.'
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;;
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esac
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umask ${oumask}
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;;
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esac
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case ${entropy_boot_file:=/boot/entropy} in
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[Nn][Oo])
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;;
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*)
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echo -n 'Writing early boot entropy file: '
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rm -f ${entropy_boot_file} 2> /dev/null
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oumask=`umask`
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umask 077
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if touch ${entropy_boot_file} 2> /dev/null; then
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entropy_boot_file_confirmed="${entropy_boot_file}"
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fi
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case ${entropy_boot_file_confirmed} in
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'')
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warn 'write failed (read-only fs?)'
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;;
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*)
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save_dev_random "${entropy_boot_file_confirmed}"
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echo '.'
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;;
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esac
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umask ${oumask}
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;;
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esac
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}
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load_rc_config $name
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# doesn't make sense to run in a svcj: config setting
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random_svcj="NO"
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run_rc_command "$1"
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