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