448aa50d4c
rc.d/random_seed. The new dirname shell function provided by rc.subr will be used, so it should work before the /usr file system is mounted. This should fix a problem in which the fs_safe shell function failed when passed the name of a file that did not exist.
105 lines
1.7 KiB
Bash
Executable File
105 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
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#
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# $NetBSD: random_seed,v 1.5 2012/12/17 18:20:50 apb Exp $
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#
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# PROVIDE: random_seed
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# REQUIRE: mountcritlocal
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# BEFORE: securelevel
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# BEFORE: bootconf
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# KEYWORD: shutdown
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#
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# The "BEFORE: securelevel" is a real dependency, in that
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# this script won't work if run after the securelevel is changed.
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#
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# The "BEFORE: bootconf" is intended to cause this to
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# be the first script that runs after mountcritlocal.
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$_rc_subr_loaded . /etc/rc.subr
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name="random_seed"
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rcvar=$name
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start_cmd="random_load"
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stop_cmd="random_save"
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random_file=${random_file:-/var/db/entropy-file}
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fs_safe()
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{
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#
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# Enforce that the file's on a local filesystem.
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# Include only the types we can actually write.
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#
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fstype=$(df -G "$1" |
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while read line ; do
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set -- $line
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if [ "$2" = "fstype" ]; then echo "$1" ; break ; fi
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done )
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case $fstype in
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ffs)
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return 0
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;;
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lfs)
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return 0
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;;
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ext2fs)
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return 0;
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;;
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msdos)
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return 0;
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;;
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v7fs)
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return 0;
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;;
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esac
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return 1
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}
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random_load()
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{
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if [ -f $random_file ]; then
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if ! fs_safe "$(dirname "${random_file}")"; then
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return 1
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fi
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set -- $(ls -ldn "${random_file}")
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st_mode="$1" # should be "-rw-------"
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st_uid="$3" # should be "0" for root
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# The file must be owned by root,
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if [ "$st_uid" != "0" ]; then
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return 1
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fi
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# and root read/write only.
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if [ "$st_mode" != "-rw-------" ]; then
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return 1
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fi
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if rndctl -L "${random_file}"; then
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echo "Loaded entropy from disk."
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fi
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fi
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}
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random_save()
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{
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oum=$(umask)
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umask 077
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rm -Pf "${random_file}"
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if ! fs_safe "$(dirname "${random_file}")"; then
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return 1
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fi
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if rndctl -S "${random_file}"; then
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echo "Saved entropy to disk."
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fi
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}
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load_rc_config $name
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run_rc_command "$1"
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