+ [[ -z "$val" ]] && return
+ ;;
+ false|no)
+ ;;
+ *)
+ ret=-$E_GSU_BAD_BOOL
+ result="required: $required, name: $name, val: $val"
+ return
+ esac
+
+ eval ${gsu_config_var_prefix}_$name='"'${val:=$default_value}'"'
+ # Check option type. ATM, only num and string are supported
+ # Other types may be added without breaking compatibility
+ case "$option_type" in
+ string)
+ ;;
+ num)
+ gsu_is_a_number "$val"
+ [[ $ret -lt 0 ]] && return
+ ;;
+ *)
+ ret=-$E_GSU_BAD_OPTION_TYPE
+ result="$name/$option_type"
+ return
+ esac
+ done
+ ret=$GSU_SUCCESS
+}
+export -f _gsu_check_options
+
+# Wrapper for bash's getopts.
+#
+# Aborts on programming errors such as missing or invalid option string. On
+# success $result contains shell code that can be eval'ed. For each defined
+# option x, the local variable o_x will be created when calling eval "$result".
+# o_x contains true/false for options without an argument or the emtpy string/the
+# given argument, depending on whether this option was contained in the "$@"
+# array.
+#
+# Example:
+# gsu_getopts abc:x:y
+# eval "$result"
+# [[ $ret -lt 0 ]] && return
+#
+# [[ "$o_a" = "true ]] && echo "The -a flag was given"
+# [[ -n "$o_c" ]] && echo "The -c option was given with arg $o_c"
+gsu_getopts()
+{
+ local i c tab=' ' cr='
+'
+
+ gsu_check_arg_count $# 1 1
+ if [[ $ret -lt 0 ]]; then
+ gsu_err_msg
+ exit 1
+ fi
+
+ ret=-$E_GSU_GETOPTS
+ result="invalid optstring $1"
+ if [[ -z "$1" || "$1" =~ "::" ]]; then
+ gsu_err_msg
+ exit 1
+ fi
+
+ for ((i=0; i < ${#1}; i++)); do
+ c=${1:$i:1}
+ case "$c" in
+ [a-zA-Z:]);;
+ *)
+ ret=-$E_GSU_GETOPTS
+ result="invalid character $c in optstring"