bin/sd-tool

   1 #!/bin/bash
   2 #
   3 # sd-tool: Helper Tool for systemd
   4 # Copyright (c)2023,2024 Alexander Barton (alex@barton.de)
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11
  12 set -o pipefail
  13
  14 BIN_D=$(dirname "$0")
  15
  16 # Detect our "share" folder ...
  17 unset SHARE_D
  18 for d in "${BIN_D}" "${BIN_D}"/..; do
  19         for s in share share/sd-tool; do
  20                 if [[ -r "${d}/${s}/sd-tool-common.inc.sh" ]]; then
  21                         SHARE_D="${d}/${s}"
  22                         break
  23                 fi
  24         done
  25         [[ -n "${SHARE_D}" ]] && break
  26 done
  27
  28 if [[ -z "${SHARE_D}" || ! -d "${SHARE_D}" ]]; then
  29         echo "Oops, failed to detect \"share\" folder of $0! Aborting!" >&2
  30         exit 1
  31 fi
  32
  33 # shellcheck source=../share/sd-tool-common.inc.sh
  34 if ! . "${SHARE_D}/sd-tool-common.inc.sh"; then
  35         echo "Oops, failed to read \"${SHARE_D}/sd-tool-common.inc.sh\"! Aborting!" >&2
  36         exit 1
  37 fi
  38
  39 # Try to handle a subcommand.
  40 # NOTE: this function does NOT return!
  41 handle_subcommand_and_quit() {
  42         cmd="$1"
  43         cmd_file="${SHARE_D}/sdt-cmd-${cmd}.inc.sh"
  44         shift
  45         if [[ -r "${cmd_file}" ]]; then
  46                 # shellcheck source=../share/sd-tool-common.inc.sh
  47                 if ! . "${cmd_file}"; then
  48                         printf "Oops, failed to read \"%s\"! Aborting!\n" "${cmd_file}" >&2
  49                         exit 1
  50                 fi
  51                 # Call command:
  52                 sdt_cmd_"${cmd}" "$@"
  53                 exit $?
  54         else
  55                 if [[ -n "${cmd}" ]]; then
  56                         printf "Unknown subcommand \"%s\"! Available commands are:\n\n" "${cmd}" >&2
  57                 else
  58                         printf "No subcommand given! Available commands are:\n\n" >&2
  59                 fi
  60                 sdt_commands
  61                 exit 2
  62         fi
  63 }
  64
  65 while true; do
  66         case "$1" in
  67                 "--help")
  68                         sdt_version
  69                         sdt_usage
  70                         exit 0
  71                         ;;
  72                 "--quiet"|"-q")
  73                         unset VERBOSE
  74                         export QUIET=1
  75                         ;;
  76                 "--verbose"|"-v")
  77                         unset QUIET
  78                         export VERBOSE=1
  79                         ;;
  80                 "--version"|"-V")
  81                         sdt_version
  82                         exit 0
  83                         ;;
  84                 "-*")
  85                         printf "Unknown option \"%s\"!\n" "$1" >&2
  86                         exit 2
  87                         ;;
  88                 *)
  89                         # Subcommand?
  90                         handle_subcommand_and_quit "$@"
  91         esac
  92         shift
  93 done
  94 exit 1