misc/gsu/common

   1 #!/bin/bash
   2 # (C) 2006-2011 Andre Noll
   3
   4 _gsu_init_errors()
   5 {
   6         gsu_errors="
   7 GSU_SUCCESS                     success
   8 E_GSU_BAD_COMMAND               invalid command
   9 E_GSU_NOT_A_NUMBER              not a number
  10 E_GSU_BAD_CONFIG_VAR            invalid config variable
  11 E_GSU_NEED_VALUE                value required but not given
  12 E_GSU_BAD_BOOL                  bad value for boolian option
  13 E_GSU_BAD_OPTION_TYPE           invalid option type
  14 E_GSU_BAD_ARG_COUNT             invalid number of arguments
  15 E_GSU_EDITOR                    failed to execute editor
  16 E_GSU_MKDIR                     failed to create directory
  17 E_GSU_GETOPTS                   getopts error
  18 $gsu_errors
  19 "
  20         local a b i=0
  21         while read a b; do
  22                 if test -z "$a"; then
  23                         continue
  24                 fi
  25                 #echo "a:$a,  b: $b"
  26                 gsu_error_txt[i]="$b"
  27                 eval $a=$i
  28                 i=$(($i + 1))
  29         done << EOF
  30         $gsu_errors
  31 EOF
  32 }
  33
  34 # check if $1 is a number
  35 gsu_is_a_number()
  36 {
  37         result="$1"
  38         if test "$1" -eq "$1" &> /dev/null; then
  39                 ret=$GSU_SUCCESS
  40         else
  41                 ret=-$E_GSU_NOT_A_NUMBER
  42         fi
  43 }
  44
  45 gsu_short_msg()
  46 {
  47         echo "$1" 1>&2
  48 }
  49
  50 gsu_msg()
  51 {
  52         gsu_short_msg "$_gsu_self: $1"
  53 }
  54
  55 gsu_date_msg()
  56 {
  57         gsu_short_msg "$_gsu_self $(date): $1"
  58 }
  59
  60 gsu_err_msg()
  61 {
  62         local txt="$result" err
  63
  64         gsu_is_a_number "$ret"
  65         if test $ret -lt 0; then
  66                 gsu_msg "unknown error ($ret:$txt)"
  67                 exit 1
  68         fi
  69         if test $result -ge 0; then
  70                 gsu_msg "unknown error ($result:$txt)"
  71                 exit 1
  72         fi
  73         err=$((0 - $result))
  74         if test -n "$txt"; then
  75                 txt="$txt: ${gsu_error_txt[$err]}"
  76         else
  77                 txt="${gsu_error_txt[$err]}"
  78         fi
  79         gsu_msg "$txt"
  80 }
  81
  82 _gsu_setup()
  83 {
  84         _gsu_self="$(basename $0)"
  85         gsu_name="${gsu_name:=$_gsu_self}"
  86         gsu_config_var_prefix="${gsu_config_var_prefix:=$gsu_name}"
  87         gsu_banner_txt="${gsu_banner_txt:-set \$gsu_banner_txt to customize this message}"
  88         _gsu_init_errors
  89 }