gdata-info

#!/bin/bash

set -e

print_help() {
cat <<EOF
Print information about gdata mounts

Options:
    -P PROJ     Mount point of project PROJ
    -m MOUNT    Projects stored on MOUNT
    -M          List all available MOUNTs
EOF
}

# A list of (mount point, project) from 'mount'
mount_info=$(mount | sed -E -n 's|.*:/(\S+) on /g/data/(\S+) type lustre.*|\1 \2|p' | sort) 

optspec="hP:m:M"
while getopts "$optspec" optchar; do
    case "${optchar}" in
        h)
            print_help
            exit 2
            ;;
        P)
            # Find all occurrences of project in mount_info
            PROJ="${OPTARG}"
            grep "\s$PROJ\$" <<< "$mount_info" | cut -f 1 -d ' '
            exit
            ;;
        m)
            # Find all occurrences of mount in mount info
            MOUNT="${OPTARG}"
            avail=$(grep "^$MOUNT\s" <<< "$mount_info" | cut -f 2 -d ' ')

            # The projects current user is a member of
            member=$(id -Gn | tr ' ' '\n')

            # Find all projects listed twice (ie. both a member of and in the current mount search)
            both=$(cat <<EOF
$avail
$member
EOF
)
            sort <<< "$both" | uniq -c | sed -n 's/^\s*2\s\(\S\+\)$/\1/p'
            exit
            ;;
        M)
            # List of unique mount points
            cut -f 1 -d ' ' <<< "$mount_info" | sort -u
            exit
            ;;
        *)
            print_help
            exit 2
            ;;
    esac
done

echo "$mount_info"