feat(job-regist): new version

ask for the solution to launch a script that will be monitored

sh/tests/job-regist_test.sh

@@ -2,7 +2,7 @@
 
 # create a function to be called everytime the process exit
 abort () {
-    rm exp.log job.log
+    rm exp.log job.log job.sh submitted expected
 }
 
 trap 'abort' EXIT
@@ -16,7 +16,11 @@ script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 SUBMITTED='student/job-regist.sh'
 EXPECTED='solutions/job-regist.sh'
 
-wait_bg_jobs () {
+create_random_job () {
+    echo "sleep $((1 + $RANDOM % 10))" > job.sh
+}
+
+wait_test_case () {
     while [ -n "$(jobs | grep -i running)" ]; do
         echo -n "."
         sleep 1
@@ -26,35 +30,26 @@ wait_bg_jobs () {
 
 # test cases
 one_process () {
-    sleep 2 &
-    source $script_dirS/$1 
+    create_random_job
+    bash $script_dirS/$1 job.sh 
 }
 
-two_processes () {
-    sleep 3 &
-    sleep 4 &
-    source $script_dirS/$1 
+wrong_numb_arguments () {
+    bash $script_dirS/$1
 }
 
-one_process_and_suspend () {
-    sleep 5 &
-    source $script_dirS/$1
-    kill -STOP %1
-    sleep 2
-    kill -CONT %1
-}
 # end of test cases
 
 challenge () {
     echo "testing $1 case"
-    $1 $SUBMITTED &
-    $1 $EXPECTED &
+    $1 $SUBMITTED > submitted &
+    $1 $EXPECTED > expected &
     
-    wait_bg_jobs
+    wait_test_case
 
     diff <(cat exp.log) <(cat job.log)
+    diff <(cat submitted) <(cat expected)
 }
 
 challenge one_process
-challenge two_processes
-challenge one_process_and_suspend
+challenge wrong_numb_arguments

sh/tests/solutions/job-regist.sh

@@ -2,10 +2,16 @@
 
 IFS='
 '
-PID=$(jobs -l %1 | grep -Eo '[\+\-] [0-9]+' | grep -Eo '[0-9]+')
+
+if [[ "$#" -ne 1 ]]; then
+    echo "Error: wrong number of arguments!"
+    exit 1
+fi
+
+bash "$1" &
 LOG_FILE="exp.log"
 
-while kill -0 "$PID" 2> /dev/null; do
+while [[ -n $(jobs | grep -iv done) ]]; do
     echo $(date +"%F %T") - $(jobs %1) >> "$LOG_FILE"
     sleep 1
 done

subjects/devops/job-regist/README.md

@@ -2,32 +2,26 @@
 
 ### Instruction
 
-Create a script, `job-regist.sh`, that will be able to monitor a specific background job.
+Create a script, `job-regist.sh`, that will be able to launch and monitor a specific job.
 
-The script needs to track the status of the first jobs spawned by the current terminal and save the status into a `job.log` file every second. It must append the new update without modifying the previous content.
+The script needs to launch a specific binary and track its status saving it into a `job.log` file every second. It must append the new update without modifying the previous content.
 
 Each update needs to be appended to the file with the current format: `YYYY-MM-DD hh:mm:ss - <job status>`
 
 The script should stop running as soon as the job it is tracking ends.
 
+If the script is used with a wrong number of argument it should exit with a status code `1` and print the following error message: `"Error: wrong number of arguments!"`.
+
 ### Usage
 
 Here an example of how the script should behave:
 
 ```console
-$ sleep 10 &
-$ sleep 12 &
-$ source job-regist.sh
-$ cat job.log
-2023-02-08 10:37:50 - [1]+  Running                 sleep 10 &
-2023-02-08 10:37:51 - [1]+  Running                 sleep 10 &
-2023-02-08 10:37:52 - [1]+  Running                 sleep 10 &
-2023-02-08 10:37:53 - [1]+  Running                 sleep 10 &
-2023-02-08 10:37:54 - [1]+  Running                 sleep 10 &
-2023-02-08 10:37:55 - [1]+  Running                 sleep 10 &
-2023-02-08 10:37:56 - [1]+  Running                 sleep 10 &
-2023-02-08 10:37:57 - [1]+  Running                 sleep 10 &
-2023-02-08 10:37:58 - [1]+  Running                 sleep 10 &
-2023-02-08 10:37:59 - [1]+  Running                 sleep 10 &
+$ cat job.sh
+sleep 2
+$ bash job-regist.sh job.sh
+$ cat exp.log
+2023-02-28 09:02:09 - [1]+  Running                 ...
+2023-02-28 09:02:10 - [1]+  Running                 ...
 $
 ```