26 lines
842 B
Bash
26 lines
842 B
Bash
#!/sbin/sh
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# Validate that the incoming OTA is compatible with an already-installed
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# system
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grep -q "Command:.*\"--wipe\_data\"" /tmp/recovery.log
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if [ $? -eq 0 ]; then
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echo "Data will be wiped after install; skipping signature check..."
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exit 0
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fi
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if [ -f /data/system/packages.xml -a -f /tmp/releasekey ]; then
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relCert=$(grep -A3 'package name="com.android.htmlviewer"' /data/system/packages.xml | grep "cert index" | head -n 1 | sed -e 's|.*"\([[:digit:]][[:digit:]]*\)".*|\1|g')
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# Tools missing? Err on the side of caution and exit cleanly
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if [ "z$relCert" == "z" ]; then exit 0; fi
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grep "cert index=\"$relCert\"" /data/system/packages.xml | grep -q `cat /tmp/releasekey`
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if [ $? -ne 0 ]; then
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echo "You have an installed system that isn't signed with this build's key, aborting..."
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exit 124
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fi
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fi
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exit 0
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