grep -E and sed -E
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			@ -91,7 +91,7 @@ dns_pleskxml_add() {
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  results="$(_api_response_split "$pleskxml_prettyprint_result" 'result' '<status>')"
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  if ! _value "$results" | grep '<status>ok</status>' | grep -qE '<id>[0-9]+</id>'; then
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  if ! _value "$results" | grep '<status>ok</status>' | egrep -q '<id>[0-9]+</id>'; then
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    # Error - doesn't contain expected string. Something's wrong.
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    _err 'Error when calling Plesk XML API.'
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    _err 'The result did not contain the expected <id>XXXXX</id> section, or contained other values as well.'
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			@ -100,7 +100,7 @@ dns_pleskxml_add() {
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    return 1
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  fi
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  recid="$(_value "$results" | grep -E '<id>[0-9]+</id>' | sed -E 's/^.*<id>([0-9]+)<\/id>.*$/\1/')"
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  recid="$(_value "$results" | egrep '<id>[0-9]+</id>' | sed -r 's/^.*<id>([0-9]+)<\/id>.*$/\1/')"
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  _info "Success. TXT record appears to be correctly added (Plesk record ID=$recid). Exiting dns_pleskxml_add()."
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			@ -136,7 +136,7 @@ dns_pleskxml_rm() {
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  # Reduce output to one line per DNS record, filtered for TXT records with a record ID only (which they should all have)
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  reclist="$(_api_response_split "$pleskxml_prettyprint_result" 'result' '<status>ok</status>' \
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    | grep "<site-id>${root_domain_id}</site-id>" \
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    | grep -E '<id>[0-9]+</id>' \
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    | egrep '<id>[0-9]+</id>' \
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    | grep '<type>TXT</type>'
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  )"
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			@ -150,12 +150,12 @@ dns_pleskxml_rm() {
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  recid="$(_value "$reclist" \
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    | grep "<host>$1.</host>" \
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    | grep "<value>$txtvalue</value>" \
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    | sed -E 's/(^.*<id>|<\/id>.*$)//g'
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    | sed -r 's/(^.*<id>|<\/id>.*$)//g'
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  )"
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  _debug "List of DNS TXT records for host:"'\n'"$(_value "$reclist" | grep "<host>$1.</host>")"
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  if ! _value "$recid" | grep -Eq '^[0-9]+$'; then
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  if ! _value "$recid" | egrep -q '^[0-9]+$'; then
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    _err "DNS records for root domain '${root_domain_name}' (Plesk ID ${root_domain_id}) + host '${sub_domain_name}' do not contain the TXT record '${txtvalue}'"
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    _err "Cannot delete TXT record. Exiting."
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    return 1
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			@ -176,7 +176,7 @@ dns_pleskxml_rm() {
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  results="$(_api_response_split "$pleskxml_prettyprint_result" 'result' '<status>')"
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  if ! _value "$results" | grep '<status>ok</status>' | grep -qE '<id>[0-9]+</id>'; then
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  if ! _value "$results" | grep '<status>ok</status>' | egrep -q '<id>[0-9]+</id>'; then
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    # Error - doesn't contain expected string. Something's wrong.
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    _err 'Error when calling Plesk XML API.'
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    _err 'The result did not contain the expected <id>XXXXX</id> section, or contained other values as well.'
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			@ -215,10 +215,10 @@ _countdots() {
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# $3 - regex to recognise useful return lines
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_api_response_split() {
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  printf '%s' "$1" \
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    | sed -E 's/(^[[:space:]]+|[[:space:]]+$)//g' \
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    | sed -r 's/(^[[:space:]]+|[[:space:]]+$)//g' \
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    | tr -d '\n\r' \
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    | sed -E "s/<\/?$2>/${NEWLINE}/g" \
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    | grep -E "$3"
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    | sed -r "s/<\/?$2>/${NEWLINE}/g" \
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    | egrep "$3"
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}
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####################  Private functions below (DNS functions) ##################################
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			@ -241,15 +241,15 @@ _call_api() {
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  # Detect any <status> that isn't "ok". None of the used calls should fail if the API is working correctly.
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  # Also detect if there simply aren't any status lines (null result?) and report that, as well.
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  statuslines="$(echo "$pleskxml_prettyprint_result" | grep -E '^[[:space:]]*<status>[^<]*</status>[[:space:]]*$')"
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  statuslines="$(echo "$pleskxml_prettyprint_result" | egrep '^[[:space:]]*<status>[^<]*</status>[[:space:]]*$')"
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  if _value "$statuslines" | grep -qv '<status>ok</status>'; then
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    # We have some status lines that aren't "ok". Get the details
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    errtext="$(_value "$pleskxml_prettyprint_result" \
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      | grep -E "(<status>|<errcode>|<errtext>)" \
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      | sed -E 's/^<(status|errcode|errtext)>/\1: /' \
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      | sed -E 's/(^[[:space:]]+|<\/(status|errcode|errtext)>$)//g'
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      | egrep "(<status>|<errcode>|<errtext>)" \
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      | sed -r 's/^<(status|errcode|errtext)>/\1: /' \
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      | sed -r 's/(^[[:space:]]+|<\/(status|errcode|errtext)>$)//g'
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    )"
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  elif ! _value "$statuslines" | grep -q '<status>ok</status>'; then
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			@ -357,7 +357,7 @@ _pleskxml_get_root_domain() {
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  # Output will be one line per known domain, containing 2 <name> tages and a single <id> tag
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  # We don't actually need to check for type, name, *and* id, but it guarantees only usable lines are returned.
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  output="$(_api_response_split "$pleskxml_prettyprint_result" 'domain' '<type>domain</type>' | sed -E 's/<(\/?)ascii-name>/<\1name>/g' | grep '<name>' | grep '<id>')"
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  output="$(_api_response_split "$pleskxml_prettyprint_result" 'domain' '<type>domain</type>' | sed -r 's/<(\/?)ascii-name>/<\1name>/g' | grep '<name>' | grep '<id>')"
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  _debug 'Domains managed by Plesk server are (ignore the hacked output):\n' "$output"
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			@ -368,13 +368,13 @@ _pleskxml_get_root_domain() {
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    _debug "Checking if '$root_domain_name' is managed by the Plesk server..."
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    root_domain_id="$(_value "$output" | grep "<name>$root_domain_name</name>" | _head_n 1 | sed -E 's/^.*<id>([0-9]+)<\/id>.*$/\1/')"
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    root_domain_id="$(_value "$output" | grep "<name>$root_domain_name</name>" | _head_n 1 | sed -r 's/^.*<id>([0-9]+)<\/id>.*$/\1/')"
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    if [ -n "$root_domain_id" ]; then
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      # Found a match
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      # SEE IMPORTANT NOTE ABOVE - THIS FUNCTION CAN RETURN HOST='', AND THAT'S OK FOR PLESK XML API WHICH ALLOWS IT.
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      # SO WE HANDLE IT AND DON'T PREVENT IT
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      sub_domain_name="$(_value "$original_full_domain_name" | sed -E "s/\.?${root_domain_name}"'$//')"
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      sub_domain_name="$(_value "$original_full_domain_name" | sed -r "s/\.?${root_domain_name}"'$//')"
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      _info "Success. Matched host '$original_full_domain_name' to: DOMAIN '${root_domain_name}' (Plesk ID '${root_domain_id}'), HOST '${sub_domain_name}'. Returning."
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      return 0
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    fi
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