regex101: PCRE (Legacy) Substitution Workspace

Regular Expression

\$([^{("\\'\/])([a-zA-Z0-9_]*)([^}\/ \t'"\n.\]:]*)

#!/usr/bin/env bash

# version  0.1.0

function generate_secret()
{
  ( umask 0077 ; dd if=/dev/urandom bs=24 count=1 2>/dev/null | base64 -w0 > "$1" )
}

if [[ -n $SRS_DOMAINNAME ]]
then
  NEW_DOMAIN_NAME="$SRS_DOMAINNAME"
elif [[ -n $OVERRIDE_HOSTNAME ]]
then
  NEW_DOMAIN_NAME="${OVERRIDE_HOSTNAME#*.}"
elif [[ -n $DOMAINNAME ]]
then
  NEW_DOMAIN_NAME="$DOMAINNAME"
else
  NEW_DOMAIN_NAME=$(hostname -d)
fi

sed -i -e "s/localdomain/${NEW_DOMAIN_NAME}/g" /etc/default/postsrsd

POSTSRSD_SECRET_FILE='/etc/postsrsd.secret'
POSTSRSD_STATE_DIR='/var/mail-state/etc-postsrsd'
POSTSRSD_STATE_SECRET_FILE="${POSTSRSD_STATE_DIR}/postsrsd.secret"

if [[ -n $SRS_SECRET ]]
then
  ( umask 0077 ; echo "$SRS_SECRET" | tr ',' '\n' > "$POSTSRSD_SECRET_FILE" )
else
  if [[ $ONE_DIR -eq 1 ]]
  then
    if [[ ! -f $POSTSRSD_STATE_SECRET_FILE ]]
    then
      install -d -m 0775 "$POSTSRSD_STATE_DIR"
      generate_secret "$POSTSRSD_STATE_SECRET_FILE"
    fi

    install -m 0400 "$POSTSRSD_STATE_SECRET_FILE"

Extraction

#!/usr/bin/env bash

# version  0.1.0

function generate_secret()
{
  ( umask 0077 ; dd if=/dev/urandom bs=24 count=1 2>/dev/null | base64 -w0 > "$1" )
}

if [[ -n $SRS_DOMAINNAME ]]
then
  NEW_DOMAIN_NAME="$SRS_DOMAINNAME"
elif [[ -n $OVERRIDE_HOSTNAME ]]
then
  NEW_DOMAIN_NAME="${OVERRIDE_HOSTNAME#*.}"
elif [[ -n $DOMAINNAME ]]
then
  NEW_DOMAIN_NAME="$DOMAINNAME"
else
  NEW_DOMAIN_NAME=$(hostname -d)
fi

sed -i -e "s/localdomain/${NEW_DOMAIN_NAME}/g" /etc/default/postsrsd

POSTSRSD_SECRET_FILE='/etc/postsrsd.secret'
POSTSRSD_STATE_DIR='/var/mail-state/etc-postsrsd'
POSTSRSD_STATE_SECRET_FILE="${POSTSRSD_STATE_DIR}/postsrsd.secret"

if [[ -n $SRS_SECRET ]]
then
  ( umask 0077 ; echo "$SRS_SECRET" | tr ',' '\n' > "$POSTSRSD_SECRET_FILE" )
else
  if [[ $ONE_DIR -eq 1 ]]
  then
    if [[ ! -f $POSTSRSD_STATE_SECRET_FILE ]]
    then
      install -d -m 0775 "$POSTSRSD_STATE_DIR"
      generate_secret "$POSTSRSD_STATE_SECRET_FILE"
    fi

    install -m 0400 "$POSTSRSD_STATE_SECRET_FILE"