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Get rid of chatter for failed commands if the filesystem is read-only.

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Include /var/db/entropy-file in the reseeding if present.  It is used for
last-ditch efforts to save entropy and thus should also be used to seed
the RNG when starting.  Print a warning instead of an error if writing the
file fails -- err() exits, preventing the umask from being restored.
Also, since there's not much that can be done about it, notifying the user
is all that's needed.

MFC after:	2 weeks
This commit is contained in:
Nate Lawson 2007-03-03 06:39:06 +00:00
parent d7f16299fc
commit 4fce38ec78
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=167185
1 changed files with 6 additions and 5 deletions
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11
etc/rc.d/random
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@ -45,6 +45,7 @@ random_start()
*)
if [ -w /dev/random ]; then
feed_dev_random "${entropy_file}"
feed_dev_random /var/db/entropy-file
fi
;;
esac
@ -60,22 +61,22 @@ random_stop()
;;
*)
echo -n 'Writing entropy file:'
rm -f ${entropy_file}
rm -f ${entropy_file} 2> /dev/null
oumask=`umask`
umask 077
if touch ${entropy_file}; then
if touch ${entropy_file} 2> /dev/null; then
entropy_file_confirmed="${entropy_file}"
else
# Try this as a reasonable alternative for read-only
# roots, diskless workstations, etc.
rm -f /var/db/entropy-file
if touch /var/db/entropy-file; then
rm -f /var/db/entropy-file 2> /dev/null
if touch /var/db/entropy-file 2> /dev/null; then
entropy_file_confirmed=/var/db/entropy-file
fi
fi
case ${entropy_file_confirmed} in
'')
err 1 'entropy file write failed.'
warn 'write failed (read-only fs?)'
;;
*)
dd if=/dev/random of=${entropy_file_confirmed} \