INFN wiki

#!/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."