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 export -f _gsu_init_errors
  34
  35 # check if $1 is a number
  36 gsu_is_a_number()
  37 {
  38         result="$1"
  39         if test "$1" -eq "$1" &> /dev/null; then
  40                 ret=$GSU_SUCCESS
  41         else
  42                 ret=-$E_GSU_NOT_A_NUMBER
  43         fi
  44 }
  45 export -f gsu_is_a_number
  46
  47 gsu_short_msg()
  48 {
  49         echo "$1" 1>&2
  50 }
  51 export -f gsu_short_msg
  52
  53 gsu_msg()
  54 {
  55         gsu_short_msg "$_gsu_self: $1"
  56 }
  57 export -f gsu_msg
  58
  59 gsu_date_msg()
  60 {
  61         gsu_short_msg "$_gsu_self $(date): $1"
  62 }
  63 export -f gsu_date_msg
  64
  65 gsu_err_msg()
  66 {
  67         local txt="$result" err
  68
  69         gsu_is_a_number "$ret"
  70         if test $ret -lt 0; then
  71                 gsu_msg "unknown error ($ret:$txt)"
  72                 exit 1
  73         fi
  74         if test $result -ge 0; then
  75                 gsu_msg "unknown error ($result:$txt)"
  76                 exit 1
  77         fi
  78         err=$((0 - $result))
  79         if test -n "$txt"; then
  80                 txt="$txt: ${gsu_error_txt[$err]}"
  81         else
  82                 txt="${gsu_error_txt[$err]}"
  83         fi
  84         gsu_msg "$txt"
  85 }
  86 export -f gsu_err_msg
  87
  88 _gsu_setup()
  89 {
  90         _gsu_self="$(basename $0)"
  91         gsu_name="${gsu_name:=$_gsu_self}"
  92         gsu_config_var_prefix="${gsu_config_var_prefix:=$gsu_name}"
  93         _gsu_init_errors
  94 }
  95 export -f _gsu_setup