Breaking bash script function after certain time [duplicate] - bash

Question

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Execute a shell function with timeout
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Elegant solution to implement timeout for bash commands and functions
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#!/usr/bin/env bash
exec 3>&1
fun_1(){
urlcount=$(wc -l < list.txt)
loopcount=0
for url in $(cat list.txt);
do
((loopcount++))
echo -e "\nProcessing URL #${loopcount} (of ${urlcount}) [ ${url} ]\n"
#the below curl command is the problem which i need to time it to maximum 5 minuts the continue the loop (because sometime it could take massive time to complete)
curl -s "http://localhost:5555/?url=$url"
# check for api status percentage
until [[ $(curl -s "http://localhost:5555/view/status" | jq -r '.status') == "100" ]]
do
echo -e "\n[-] Waiting for command $url\n"
sleep 5 || break
done
curl -s "http://localhost:5555/results" | jq -r '.results[]' >> results.txt
done
}
for domain in "$#"
do
fun_1 $domain 2>&1 >&3 | tee -a $WORKING_DIR/error_log.txt
done
This script has multiple functions like fun_1 which is execute one after another.
The problem is some functions which have a loop function using for loop or while loop could be running for very long time,
which is exhausting my server (VPS) and of course waste of time.
THE QUESTION is can I time this function to run for a certain time like one or two hour as maximum?

Answer 1

You could check how many seconds the script is running since start time, using the $SECONDS variable, and see if it's greater than some defined deadline.
I have replicated your execution flow while swapping something for dummy functionality.
#!/usr/bin/env bash
exec 3>&1
fun_1() {
domain="$1"
deadline="$2"
for i in {1..100}; do
echo "iteration $i"
# try until deadline is exceeded or curl succeeds
curl_success=0
until [ "$SECONDS" -gt "$deadline" ] || [ "$curl_success" -eq 1 ]; do
echo "retrying..."
sleep 5
done
# if deadline is exceeded, break out of the loop
if [ "$SECONDS" -gt "$deadline" ]; then
echo "Deadline exeeded"
break
fi
# curl results if deadline not exeeded
echo "curling results..."
done
}
deadline=$((SECONDS + 10))
for domain in "$#"; do
# if deadline is exceeded, break out of the loop
if [ "$SECONDS" -gt "$deadline" ]; then
echo "Deadline exeeded"
break
fi
fun_1 "$domain" "$deadline" 2>&1 >&3 | tee -a ./error_log.txt
done
You could also try to do some tricks with timeout. For example, if you can't modify your function to build a timeout into it.