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--- strutture:roma1:experiments:ams2:internal_note_naia:bash_script [2025/05/02 13:54] – created bartolon@infn.it
+++ strutture:roma1:experiments:ams2:internal_note_naia:bash_script [2025/05/02 13:56] (current) – bartolon@infn.it
@@ Line 1: / Line 1: @@
+  #!/bin/bash
+  # Directory path where .root files are located
+  DIR="/storage/gpfs_ams/ams/groups/AMS-Italy/ntuples/v1.1.0/ISS.B1236/pass8"
+  # Output file path (explicitly in current directory)
+  OUTPUT="$(pwd)/file_list.txt"
+  # Minimum and maximum Unix timestamps for filtering
+  MIN_TIME=1640994629
+  MAX_TIME=1646093960
+  # Debug: Show current directory and permissions
+  echo "Current directory: $(pwd)"
+  echo "Permissions of current directory: $(ls -ld .)"
+  # Remove the output file if it already exists
+  echo "Removing $OUTPUT if it exists..."
+  rm -f "$OUTPUT" || { echo "Error: Cannot remove $OUTPUT, check permissions"; exit 1; }
+  # Test write permission
+  echo "Testing write permission in $(pwd)..."
+  touch "$OUTPUT" || { echo "Error: Cannot create $OUTPUT, no write permission"; exit 1; }
+  rm -f "$OUTPUT"
+  # Change to the input directory
+  echo "Changing to $DIR..."
+  cd "$DIR" || { echo "Error: Cannot change to $DIR"; exit 1; }
+  # Use ls and awk to filter and sort files in one go
+  echo "Generating $OUTPUT..."
+  ls -1 *.root | awk -v dir="$DIR" -v min="$MIN_TIME" -v max="$MAX_TIME" '
+  {
+  # Extract timestamp by removing .root extension
+  timestamp = substr($0, 1, length($0)-5)
+  # Check if timestamp is numeric and within range
+  if (timestamp ~ /^[0-9]+$/ && timestamp > min && timestamp < max) {
+  print dir "/" $0
+  }
+  }' | sort -n > "$OUTPUT" || { echo "Error: Cannot write to $OUTPUT during sort"; exit 1; }
+  # Count the number of lines in the output file
+  count=$(wc -l < "$OUTPUT")
+  # Print completion message
+  echo "File $OUTPUT created successfully with $count entries."