Differential D19742 Diff 55568 libexec/save-entropy/save-entropy.sh

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libexec/save-entropy/save-entropy.sh

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	done			done

	umask 377			umask 377

	n=$(( ${entropy_save_num} - 1 ))			n=$(( ${entropy_save_num} - 1 ))
	while [ ${n} -ge 1 ]; do			while [ ${n} -ge 1 ]; do
	if [ -f "saved-entropy.${n}" ]; then			if [ -f "saved-entropy.${n}" ]; then
	mv "saved-entropy.${n}" "saved-entropy.$(( ${n} + 1 ))"			mv "saved-entropy.${n}" "saved-entropy.$(( ${n} + 1 ))"
				fsync .
				delphijUnsubmitted Not Done Inline Actions fsync'ing the directory node would result in more writes and I think we can tolerate if it failed to sync. delphij: fsync'ing the directory node would result in more writes and I think we can tolerate if it…
				cemAuthorUnsubmitted Done Inline Actions If a small number of additional writes is a problem, and we can tolerate losing every rotated file (by lost dirent reference), I propose that we can save even more writes by keeping only one entropy file. cem: If a small number of additional writes is a problem, and we can tolerate losing every rotated…
	elif [ -e "saved-entropy.${n}" -o -L "saved-entropy.${n}" ]; then			elif [ -e "saved-entropy.${n}" -o -L "saved-entropy.${n}" ]; then
	logger -is -t "$0" \			logger -is -t "$0" \
	"${entropy_dir}/saved-entropy.${n}" is not a regular file, and so \			"${entropy_dir}/saved-entropy.${n}" is not a regular file, and so \
	it will not be rotated. Entropy file rotation is aborted.			it will not be rotated. Entropy file rotation is aborted.
	exit 1			exit 1
	fi			fi
	n=$(( ${n} - 1 ))			n=$(( ${n} - 1 ))
	done			done

	dd if=/dev/random of=saved-entropy.1 bs=${entropy_save_sz} count=1 2>/dev/null			dd if=/dev/random of=saved-entropy.1 bs=${entropy_save_sz} count=1 2>/dev/null
				fsync saved-entropy.1
				delphijUnsubmitted Done Inline Actions This can be merged with the '.' (fsync saved-entropy.1 .). delphij: This can be merged with the '.' (fsync saved-entropy.1 .).
				cemAuthorUnsubmitted Done Inline Actions Ah, I did not realize fsync(1) took a list of files! Thank you, I'll fix it. cem: Ah, I did not realize fsync(1) took a list of files! Thank you, I'll fix it.
				fsync .

	exit 0			exit 0