B.8. Get the Value for Multiple Fields

The ha_get_multi_fields() function obtains the field values from a string, where $1 is the string and $2 is the field name. The string format is a series of name-value field pairs, where a name field is followed by the value of the name, separated by whitespace.

This function is typically used to extract dependency information. There may be multiple fields with the same name so the string returned in HA_FIELD_VALUE may contain multiple values separated by white space. This appears as follows:

ha_get_multi_fields() { HA_STR=$1 HA_FIELD_NAME=$2 ha_found=0; ha_field=1; for ha_i in $HA_STR do if [ $ha_field -eq 1 ]; then ha_field=0; if [ $ha_i = $HA_FIELD_NAME ]; then ha_found=1; fi else ha_field=1; if [ $ha_found -eq 1 ]; then if [ -z "$HA_FIELD_VALUE" ]; then HA_FIELD_VALUE=$ha_i; else HA_FIELD_VALUE="$HA_FIELD_VALUE $ha_i"; fi; ha_found=0; fi fi done if [ -z "$HA_FIELD_VALUE" ]; then return 1; else return 0; fi }