80 lines
1.6 KiB
Bash
80 lines
1.6 KiB
Bash
#!/bin/bash
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list_users() {
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awk -F: '{print $1, $6}' /etc/passwd | sort
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}
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list_processes() {
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ps -eo pid,comm --sort=pid
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}
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show_help() {
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echo "Usage: $0 [options]."
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echo "Options:"
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echo " -u, --users Display a list of users and their home directories"
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echo " -p, --processes Display a list of running processes"
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echo " -l, --log PATH Redirect output to a specified file"
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echo " -e, --errors PATH Redirect error output to a specified file"
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echo " -h, --help Show this message and terminate"
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}
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check_path() {
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local path=$1
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if [ ! -w "$path" ]; then
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echo "Error: No access to write to $path" >&2
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exit 1
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fi
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}
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log_output() {
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local path=$1
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check_path "$path"
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exec >"$path"
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}
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log_errors() {
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local path=$1
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check_path "$path"
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exec 2>"$path"
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}
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ARGS=$(getopt -o upl:e:h --long users,processes,log:,errors:,help -n "$0" -- "$@")
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if [ $? -ne 0 ]; then
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echo "Error: Incorrect input" >&2
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exit 1
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fi
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eval set -- "$ARGS"
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while true; do
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case "$1" in
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-u|--users)
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list_users
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shift
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;;
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-p|--processes)
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list_processes
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shift
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;;
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-l|--log)
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log_output "$2"
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shift 2
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;;
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-e|--errors)
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log_errors "$2"
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shift 2
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;;
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-h|--help)
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show_help
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exit 0
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;;
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--)
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shift
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break
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;;
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*)
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echo "Unknown parameter $1" >&2
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exit 1
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;;
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esac
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done
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