A log viewer that allows viewing of log files in log folder. Particularly useful in situations where a user doesn't have root priviledges but requires to view logs

logviewer.sh

#!/bin/sh

if [ "$(id -u)" != "0" ]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi

usage="
Usage: $(basename "$0") -d LOG_DIRECTORY [-r LOG_FILE]

List and read log files in LOG_DIRECTORY
"


if [[ "$1" == "" ]]; then
    echo "${usage}"
    exit 1;
fi

dir=
file=

while getopts ":d:r:" opt; do

    #escape arguments
    arg=$(printf %q $OPTARG);

    case $opt in
        d)
            dir=$arg;
            ;;
        r)
            file=$arg;
            ;;
        \?)
            echo "Invalid option: -$OPTARG" >&2
            exit 1;
            ;;
        :)
            echo "Option -$OPTARG requires an argument." >&2
            exit 1;
            ;;
    esac
done

if [[ ! -d "${dir}" ]]; then
    echo "${dir} is not a directory";
    exit 1;
fi

if [[ ${dir} == */log* ]]; then
    CMD="ls ${dir}";

    if [[ "${file}" != "" ]]; then
        if [[ -f "${dir}/${file}" ]]; then
            CMD="cat ${dir}/${file}";
        else
            echo "Log file not found";
            exit 1;
        fi
    fi
    ${CMD}
else
    echo "Not a valid log directory"
    exit 1;
fi