Refactor piscal_launcher.sh and piscal_manager.sh for improved quoting and error handling. Ensure proper handling of variables and directory paths to enhance script robustness.

piscal-manager/piscal_manager.sh

@@ -118,9 +118,9 @@ fi
 ## Process task
 if [ "$task" = "launch" ]; then
     # verify process isn't running yet
-    pid=$(head -n 1 $pid_path 2>/dev/null)
+    pid="$(head -n 1 "$pid_path" 2>/dev/null)"
     # if the pid exists, check the process status using ps
-    if ps -p $pid &>/dev/null; then
+    if [ -n "$pid" ] && ps -p "$pid" &>/dev/null; then
         # if it is in ps, then it's still running
         echo still running
         exit 1
@@ -143,10 +143,10 @@ if [ "$task" = "launch" ]; then
     fi
 
     # launch it, sending error output to file
-    nohup ${command} > $working_directory/$stderr_filename 2>&1 &
+    nohup ${command} > "$working_directory/$stderr_filename" 2>&1 &
 
     # write the PID to a temp file to check for completion later
-    echo $! > $pid_path
+    echo $! > "$pid_path"
     echo started
 elif [ "$task" = "get_status" ] || [ "$task" = "get_status_cleaned_input" ]; then
     # if the pid doesn't exist, then process hasn't started
@@ -155,9 +155,13 @@ elif [ "$task" = "get_status" ] || [ "$task" = "get_status_cleaned_input" ]; the
         exit
     fi
 
-    pid=$(head -n 1 $pid_path 2>/dev/null)
+    pid="$(head -n 1 "$pid_path" 2>/dev/null)"
+    if [ -z "$pid" ]; then
+        echo "not started"
+        exit
+    fi
     # if the pid exists, check the process status using ps
-    if ps -p $pid > /dev/null; then
+    if ps -p "$pid" > /dev/null; then
         # if it is in ps, then it's still running
         echo running
     else
@@ -197,9 +201,9 @@ elif [ "$task" = "cleanup" ]; then
         exit 0
     fi
 
-    pid=$(head -n 1 $pid_path 2>/dev/null)
+    pid="$(head -n 1 "$pid_path" 2>/dev/null)"
     # if the pid exists, check the process status using ps
-    if ps -p $pid > /dev/null; then
+    if [ -n "$pid" ] && ps -p "$pid" > /dev/null; then
         # if it is in ps, then it's still running
         echo still running
         exit 1
@@ -214,11 +218,14 @@ elif [ "$task" = "kill" ]; then
         exit 0
     fi
 
-    pid=$(head -n 1 $pid_path 2>/dev/null)
+    pid="$(head -n 1 "$pid_path" 2>/dev/null)"
+    if [ -z "$pid" ]; then
+        exit 0
+    fi
     # if the pid exists, check the process status using ps
-    if ps -p $pid > /dev/null; then
+    if ps -p "$pid" > /dev/null; then
         # if it is in ps, then it's still running
-        kill $pid
+        kill "$pid"
     fi
     echo killed
 fi