updateEA.sh

#!/bin/sh

# This is an example only, and is not a valid script

# Set the url and credentials
jssURL="https://tryitout.jamfcloud.com/JSSResource"
endPoint="/computers"
jssUser="admin"
jssPass="password"

# get the ids from a given endpoint
ids=$(curl -H "Content-Type: application/xml" -ksu "$jssUser":"$jssPass" "${jssURL}${endPoint}" -X GET | xpath "//id[not(ancestor::site)]" 2> /dev/null | sed s/'<id>'//g | sed s/'<\/id>'/','/g)
# parse those ids into an array
IFS=', ' read -r -a allIDs <<< ${ids}

# initialize a variable to read names into
gatherID="{"

# loop over each id
for curID in ${allIDs[@]};
do
    # get the name of each computer from each id
	value=$(curl -H "Accept : text/xml" -H "Content-Type: text/xml" -ksu "$jssUser":"$jssPass" "$jssURL/computers/id/$curID" -X GET | xpath //computer/general/name/text\(\) 2> /dev/null)
    
    # if the name isn't null then add it to the gatherID string.
	if [ "$value" != null ]; then
		gatherID+="$curID,"
	fi
	
done

# remove the final comma from the gatherID string
gatherID=$(echo $gatherID | sed 's/.$//')
gatherID+="}"

# update computers by id with an asset tag.
curl -H "Content-Type: text/xml" -ku "$jssUser:$jssPass" "${jssURL}""/computers/id/""${gatherID}" -X PUT -d "<computer><general><asset_tag>modme</asset_tag></general></computer>" &> /tmp/error.txt