2023-10-17 17:42:22 +00:00
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#!/bin/sh /etc/rc.common
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# MAC addresses of connected clients are stored in a sqlite database.
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# Having the database seems to be necessary for the device to be working properly.
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# We intent to have the device store the database in RAM rather than on flash.
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# We replace the directory with a memory-backed tmpfs which is as volatile as we can make it.
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2023-10-18 11:24:47 +00:00
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# We want to run ahead of "gl-tertf" which, currently, has a prioprity of 60.
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# We also want to run ahead of "gl_clients" which has 99.
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START=59
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2023-10-17 17:42:22 +00:00
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STOP=99
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start() {
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2023-10-18 12:27:55 +00:00
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tmpdir="$(mktemp -d)"
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# We mount a tmpfs so that the client database will be stored in memory only
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mount -t tmpfs / "$tmpdir"
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cp -a /etc/oui-tertf/client.db "$tmpdir"
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2023-10-18 19:06:46 +00:00
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shred --force --remove /etc/oui-tertf/client.db || rm -f /etc/oui-tertf/client.db
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2023-10-18 12:27:55 +00:00
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# If this script runs multiple times, we accumulate mounts; we try to avoid having mounts over mounts, so we unmount any existing tmpfs
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umount -t tmpfs -l /etc/oui-tertf
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mount -t tmpfs / /etc/oui-tertf
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cp -a "$tmpdir/client.db" /etc/oui-tertf/client.db
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umount -t tmpfs -l "$tmpdir"
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2023-10-17 17:42:22 +00:00
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}
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stop() {
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shred /etc/oui-tertf/client.db || rm -f /etc/oui-tertf/client.db
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}
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