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Fix cases where a CPU ucode version is not found in $procfs/cpuinfo. (#246)

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* Fix cases where a CPU ucode version is not found in $procfs/cpuinfo.

When running whithin a virtual machine, it seems like $procfs/cpuinfo doesn't contain
a 'microcode' line, which triggers a script runtime error.
Fall back to '0x0' in this case, as other part of the script seems to already this
as a default value anyway.

* Double quote to prevent globbing and word splitting.
This commit is contained in:
Nicolas Sauzede 2018-09-19 22:00:59 +02:00 committed by Stéphane Lesimple
parent 1571a56ce2
commit fbbb19f244
1 changed files with 2 additions and 1 deletions
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spectre-meltdown-checker.sh
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@ -1104,7 +1104,8 @@ parse_cpu_details()
cpu_family=$( grep '^cpu family' "$procfs/cpuinfo" | awk '{print $4}' | grep -E '^[0-9]+$' | head -1)
cpu_model=$( grep '^model' "$procfs/cpuinfo" | awk '{print $3}' | grep -E '^[0-9]+$' | head -1)
cpu_stepping=$(grep '^stepping' "$procfs/cpuinfo" | awk '{print $3}' | grep -E '^[0-9]+$' | head -1)
cpu_ucode=$( grep '^microcode' "$procfs/cpuinfo" | awk '{print $3}' | head -1)
# read CPU ucode from $procfs/cpuinfo. fall-back to 0x0 if not found (eg: with a virtual machine)
cpu_ucode=$( raw_cpu_ucode=$(grep '^microcode' "$procfs/cpuinfo") && echo "$raw_cpu_ucode" | awk '{print $3}' | head -1 || echo "0x0")
else
cpu_friendly_name=$(sysctl -n hw.model)
fi