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 BIN_D=$(dirname "$0")
  13
  14 # Detect our "share" folder ...
  15 unset SHARE_D
  16 for d in "${BIN_D}" "${BIN_D}"/..; do
  17         for s in share share/sd-tool; do
  18                 if [[ -r "${d}/${s}/sd-tool-common.inc.sh" ]]; then
  19                         SHARE_D="${d}/${s}"
  20                         break
  21                 fi
  22         done
  23         [[ -n "${SHARE_D}" ]] && break
  24 done
  25
  26 if [[ -z "${SHARE_D}" || ! -d "${SHARE_D}" ]]; then
  27         echo "Oops, failed to detect \"share\" folder of $0! Aborting!" >&2
  28         exit 1
  29 fi
  30
  31 # shellcheck source=../share/sd-tool-common.inc.sh
  32 if ! . "${SHARE_D}/sd-tool-common.inc.sh"; then
  33         echo "Oops, failed to read \"${SHARE_D}/sd-tool-common.inc.sh\"! Aborting!" >&2
  34         exit 1
  35 fi
  36
  37 # Try to handle a subcommand.
  38 # NOTE: this function does NOT return!
  39 handle_subcommand_and_quit() {
  40         cmd="$1"
  41         cmd_file="${SHARE_D}/sdt-cmd-${cmd}.inc.sh"
  42         shift
  43         if [[ -r "${cmd_file}" ]]; then
  44                 # shellcheck source=../share/sd-tool-common.inc.sh
  45                 if ! . "${cmd_file}"; then
  46                         printf "Oops, failed to read \"%s\"! Aborting!\n" "${cmd_file}" >&2
  47                         exit 1
  48                 fi
  49                 # Call command:
  50                 sdt_cmd_"${cmd}" "$@"
  51                 exit $?
  52         else
  53                 if [[ -n "${cmd}" ]]; then
  54                         printf "Unknown subcommand \"%s\"! Available commands are:\n\n" "${cmd}" >&2
  55                 else
  56                         printf "No subcommand given! Available commands are:\n\n" >&2
  57                 fi
  58                 sdt_commands
  59                 exit 2
  60         fi
  61 }
  62
  63 while true; do
  64         case "$1" in
  65                 "--help")
  66                         sdt_version
  67                         sdt_usage
  68                         exit 0
  69                         ;;
  70                 "--quiet"|"-q")
  71                         unset VERBOSE
  72                         export QUIET=1
  73                         ;;
  74                 "--verbose"|"-v")
  75                         unset QUIET
  76                         export VERBOSE=1
  77                         ;;
  78                 "--version"|"-V")
  79                         sdt_version
  80                         exit 0
  81                         ;;
  82                 "-*")
  83                         printf "Unknown option \"%s\"!\n" "$1" >&2
  84                         exit 2
  85                         ;;
  86                 *)
  87                         # Subcommand?
  88                         handle_subcommand_and_quit "$@"
  89         esac
  90         shift
  91 done
  92 exit 1