111 lines
2.2 KiB
Bash
111 lines
2.2 KiB
Bash
#! /bin/sh
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STATE_OK=0
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STATE_WARNING=1
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STATE_CRITICAL=2
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STATE_UNKNOWN=3
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STATE_DEPENDENT=4
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print_revision() {
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echo "$1 v$2 (@PACKAGE@ @VERSION@)"
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printf '%b' "@WARRANTY@"
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}
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support() {
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printf '%b' "@SUPPORT@"
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}
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#
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# check_range takes a value and a range string, returning successfully if an
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# alert should be raised based on the range. Range values are inclusive.
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# Values may be integers or floats.
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#
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# Example usage:
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#
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# Generating an exit code of 1:
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# check_range 5 2:8
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#
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# Generating an exit code of 0:
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# check_range 1 2:8
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#
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check_range() {
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local v range yes no err decimal start end cmp match
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v="$1"
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range="$2"
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# whether to raise an alert or not
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yes=0
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no=1
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err=2
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# regex to match a decimal number
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decimal="-?([0-9]+\.?[0-9]*|[0-9]*\.[0-9]+)"
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# compare numbers (including decimals), returning true/false
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cmp() { awk "BEGIN{ if ($1) exit(0); exit(1)}"; }
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# returns successfully if the string in the first argument matches the
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# regex in the second
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match() { echo "$1" | grep -E -q -- "$2"; }
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# make sure value is valid
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if ! match "$v" "^$decimal$"; then
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echo "${0##*/}: check_range: invalid value" >&2
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unset -f cmp match
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return "$err"
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fi
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# make sure range is valid
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if ! match "$range" "^@?(~|$decimal)(:($decimal)?)?$"; then
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echo "${0##*/}: check_range: invalid range" >&2
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unset -f cmp match
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return "$err"
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fi
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# check for leading @ char, which negates the range
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if match $range '^@'; then
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range=${range#@}
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yes=1
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no=0
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fi
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# parse the range string
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if ! match "$range" ':'; then
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start=0
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end="$range"
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else
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start="${range%%:*}"
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end="${range#*:}"
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fi
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# do the comparison, taking positive ("") and negative infinity ("~")
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# into account
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if [ "$start" != "~" ] && [ "$end" != "" ]; then
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if cmp "$start <= $v" && cmp "$v <= $end"; then
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unset -f cmp match
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return "$no"
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else
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unset -f cmp match
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return "$yes"
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fi
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elif [ "$start" != "~" ] && [ "$end" = "" ]; then
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if cmp "$start <= $v"; then
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unset -f cmp match
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return "$no"
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else
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unset -f cmp match
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return "$yes"
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fi
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elif [ "$start" = "~" ] && [ "$end" != "" ]; then
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if cmp "$v <= $end"; then
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unset -f cmp match
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return "$no"
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else
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unset -f cmp match
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return "$yes"
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fi
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else
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unset -f cmp match
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return "$no"
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fi
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}
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