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ENV now supports HOST SERVICE and CONTACT custom macro double-decode.

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This commit is contained in:
Eric Loyd
2024-08-07 13:17:09 -04:00
parent 7cada9d791
commit a83f240ed7
1 changed files with 62 additions and 16 deletions
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ENV
+60 -14
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@@ -1,26 +1,32 @@
#!/bin/bash
varName="novalue"
varName="servicedesc"
varDefault=""
myDelim=" "
myDelim="[ :-]"
myField=""
myHost=""
myService=""
myContact=""
doUpper=""
do_help() {
cat << HELP_EOF
This utility is designed to be called by the ARGx parameters of a Nagios configuration as follows:
\$\$(\$USER1\$/env -n <var> [-t <default>] [-f <field>] [-d <delim>]
\$\$(\$USER1\$/env -n <var> [-t <default>] [-f <field>] [-d <delim>] [-u] [-H|-S|-C <suffix>]
Where:
var is the name of a NAGIOS_variable (see https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/macrolist.html) (case insensitive)
default is a default value if \$NAGIOS_var\$ is blank (case sensitive)
word is an awk-compatible field number (potentially to use with <delim>)
delim is an awk-compatible field delimiter (defaults to space)
var the name of a case-insensitive NAGIOS_variable (defaults to "servicedesc")
default a default value if \$NAGIOS_var\$ is blank (case sensitive)
field an awk-compatible field number (potentially to use with <delim>)
delim an awk-compatible field delimiter (defaults to space, dash, and colon)
-u Convert the output to uppercase (useful for further levels of indirection)
suffix Take var result and use the it to get NAGIOS__[HOST|SERVICE|CONTACT]<result><suffix>
The value will always be trimmed of leading and/or trailing spaces/tabs.
If -f is used, then the result will be as if the request were:
If -f is used, then the result will be as if the request were as follows, unless the field starts with a negative, in which case it will read from the last word forward:
eche \$NAGIOS_var\$ | awk -F <delim> '{print $<field>}'
@@ -32,30 +38,70 @@ Examples:
Will return "localhost" (or whatever the name of the host is that ran the check)
.../env -n SERVICESTATE -t 0
Will return the current state of the service (0, 1, 2) or 0 if the state is not defined
.../env -n servicedesc -f 2
If the service name is "MySQL Check: myDatabase performance" then it will return "Check" (watch out for defaults!)
.../env -n servicedesc -f 4
If the service name is "MySQL Check: myDatabase performance" then it will return "myDatabase" (watch out for defaults!)
.../env -n servicedesc -d : -f 2
If the service name is "MySQL Check: myDatabase" then it will return "myDatabase" (trimmed)
If the service name is "MySQL Check: myDatabase performance" then it will return "myDatabase performance"
.../env -n servicedesc -d : -f -2
If the service name is "MySQL Check: myDatabase performance" then it will return "MySQL Check" (2nd field from right, split by :)*
.../env -n servicedesc -f -2 -H pass
If the service name is "MySQL Check: myDatabase performance" it will return the value of \$NAGIOS__HOSTNAGIOSXIPASS\$
see https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/macrolist.html for possible macro names.
*0 for this field will print the entire line
HELP_EOF
exit
}
while [ -n "$1" ]; do
case "$1" in
-n) varName=`echo "NAGIOS_$2" | tr "a-z" "A-Z"`; shift 2;;
-h|--help) do_help;;
-n) varName="$2"; shift 2;;
-t) varDefault="$2"; shift 2;;
-d) myDelim="$2"; shift 2;;
-f) myField="$2"; shift 2;;
-H) myHost="$2"; shift 2;;
-S) myService="$2"; shift 2;;
-C) myContact="$2"; shift 2;;
-u) doUpper="true"; shift 1;;
*) shift 1;;
esac
done
# If we don't have a config file, then we don't have variables
if [ -f "$NAGIOS_MAINCONFIGFILE" ]; then
varName=`echo "NAGIOS_$varName" | tr "a-z" "A-Z"`
varValue="${!varName}"
[ -n "$varValue" -a -n "$myField" ] && varValue=`echo "$varValue" | awk -F "$myDelim" --assign f="$myField" '{print $f}'`
if [ -n "$myField" ]; then
if [ "$myField" -lt 0 ]; then
varValue=`echo "$varValue" | rev | awk -F "$myDelim" -v f="${myField:1}" '{print $f}' | rev`
else
varValue=`echo "$varValue" | awk -F "$myDelim" -v f="$myField" '{print $(f)}'`
fi
fi
[ -z "$varValue" ] && varValue="$varDefault"
varValue=`echo $varValue | sed -e "s/^[ \t]*//" -e "s/[ \t]*$//"`
[ -n "$doUpper" ] && varValue=`echo "$varValue" | tr "a-z" "A-Z"`
# Check for myHost
if [ -n "$myHost" ]; then
myHost=`echo "NAGIOS__HOST${varValue}${myHost}" | tr "a-z" "A-Z"`
varValue=${!myHost}
fi
# Check for myService
if [ -n "$myService" ]; then
myService=`echo "NAGIOS__SERVICE${varValue}${myService}" | tr "a-z" "A-Z"`
varValue=${!myService}
fi
# Check for myContact
if [ -n "$myContact" ]; then
myContact=`echo "NAGIOS__CONTACT${varValue}${myContact}" | tr "a-z" "A-Z"`
varValue=${!myContact}
fi
[ -z "$varValue" ] && varValue="$varDefault"
echo "$varValue"
exit 0