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Gleb Chesnokov
0aa6689c3a
Reject zero and nonnumeric sampling intervals before entering the monitor loops, avoiding division errors and repeated failed sleep calls.
30 lines
562 B
Bash
Executable File
30 lines
562 B
Bash
Executable File
#!/bin/bash
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interval="${1:-5}"
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if ! [[ "$interval" =~ ^0*[1-9][0-9]*$ ]]; then
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echo "Error: interval must be a positive integer." >&2
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exit 1
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fi
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interval="${interval#"${interval%%[!0]*}"}"
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echo "Interrupts per second:"
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while true
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do
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sum=0
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while read -r line
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do
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for word in $line
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do
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if [ "${word#[0-9]}" != "$word" ] && [ "${word%[0-9]}" != "$word" ]; then
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sum="$((sum + word))"
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fi
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done
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done </proc/interrupts
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if [ "$prev" != "" ]; then
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echo $(((sum-prev)/interval))
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fi
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prev="$sum"
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sleep "$interval"
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done
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